COLUMBIA BANCORP
8-K, 1999-10-04
STATE COMMERCIAL BANKS
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                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549

                             _______________________

                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


      Date of Report (Date of earliest event reported): September 28, 1999


                                COLUMBIA BANCORP
               (Exact Name of Registrant as Specified in Charter)





         Maryland                      0-23402                    52-1545782
       (State or Other          (Commission File Number)        (IRS Employer
Jurisdiction of Incorporation)                               Identification No.)



             10480 Little Patuxent Parkway, Columbia, Maryland 21044
                  (Address of Principal Executive Offices) (ZIP Code)





        Registrant's telephone number, including area code (410) 465-4800



          (Former Name or Former Address, if Changed Since Last Report)

<PAGE>


Item 5.       Other Events.

     On September 28, 1999, Columbia Bancorp ("Columbia Bancorp") entered into a
Plan and Agreement to Merge (the "Agreement") with Suburban Bancshares,  Inc., a
Delaware  corporation  ("Suburban  Bancshares"),  which  provides  for  Suburban
Bancshares  to  merge  with  and  into  Columbia  Bancorp  (the  "Merger")  in a
pooling-of-interests  transaction.  Upon completion of the Merger, Suburban Bank
of Maryland, a wholly-owned  subsidiary of Suburban Bancshares,  will merge into
The Columbia  Bank, a  wholly-owned  subsidiary  of Columbia  Bancorp,  with The
Columbia Bank the surviving entity.  The Merger is conditioned upon, among other
things,  the  approvals  of  stockholders  of  Columbia  Bancorp and of Suburban
Bancshares and receipt of certain bank  regulatory  approvals.  The Agreement is
filed herewith as Exhibit 2.1 and is incorporated herein by reference.

     Under the Agreement,  each of the issued and outstanding shares of Suburban
Bancshares common stock will be converted into shares of Columbia Bancorp common
stock. In addition,  all Suburban Bancshares stock options will be exchanged for
options to purchase shares of Columbia Bancorp common stock.

     The actual number of shares of Columbia  Bancorp  common stock to be issued
in the Merger to the holders of Suburban  Bancshares  common stock will be based
on the  number  of  shares  of  Suburban  Bancshares  common  stock  outstanding
immediately  prior to the effective  date  multiplied  by a conversion  ratio of
0.2196.  The conversion  ratio may be increased to the extent necessary to cause
the average market value of shares of Columbia Bancorp common stock received for
each share of Suburban  Bancshares  common stock to be $3.00 per share,  however
the conversion ratio may not be increased above 0.2338.

     In connection  with the  execution of the  Agreement,  Suburban  Bancshares
granted to Columbia Bancorp an option (the "Suburban  Option") to purchase up to
2,807,668  shares of Suburban  Bancshares  common stock at an exercise  price of
$2.313  per share  upon the  occurrence  of certain  events,  including  but not
limited to a change in control of Suburban  Bancshares or the  acquisition  by a
third party of 15% of the voting  power of  Suburban  Bancshares  common  stock,
prior to the effective  date of the Merger or the  termination of the Agreement.
In addition,  Columbia  Bancorp  granted to Suburban  Bancshares  an option (the
"Columbia  Option") to purchase up to 497,140 shares of Columbia  Bancorp common
stock at an exercise  price of $13.063 per share upon the  occurrence of certain
events,  including but not limited to a change in control of Columbia Bancorp or
the acquisition by a third party of 15% of the voting power of Columbia  Bancorp
common stock,  prior to the effective  date of the Merger or the  termination of
the Agreement.

     The foregoing  descriptions  of the Agreement,  the Suburban Option and the
Columbia Option, and the transactions contemplated thereby, do not purport to be
complete  and are  qualified in their  entirety by  reference to the  Agreement,
attached as an exhibit hereto,  and the Suburban Option and the Columbia Option,
attached as  appendices to the  Agreement  and filed  herewith.  A press release

                                       2

<PAGE>

issued by the Company on  September  28, 1999  announcing  the  execution of the
Agreement is also attached hereto as Exhibit 99.1 and  incorporated by reference
herein.

Item 7. Financial Statements, Pro Forma Financial Information and Exhibits.

          (a) and (b) Not Applicable

          (c) Exhibits. The following exhibits are filed with this report:

          2.1 Plan and Agreement to Merge,  dated September 28, 1999,  among
          Columbia Bancorp and Suburban Bancshares, Inc.

          3.3  Amended  and  Restated  By-Laws of  Columbia  Bancorp,  restated
          as of September 27, 1999.

          99.1 Press  Release, dated  September 28, 1999  of Columbia  Bancorp,
          filed herewith.

                                       3
<PAGE>

                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                       COLUMBIA BANCORP



                                       By: /s/ John Scaldara
                                              ------------------------------
                                               John Scaldara
                                               Executive Vice President
                                               and Chief Financial Officer


Date:September 29, 1999

                                       4
<PAGE>


                                  EXHIBIT INDEX


Exhibit  Description                                                    Page No.

2.1      Plan and Agreement to Merge, dated September 28, 1999,
         among Columbia Bancorp and Suburban Bancshares, Inc.

3.3      Amended and Restated By-Laws of Columbia Bancorp, restated
         as of September 27, 1999.

99.1     Press Release, dated September 28, 1999 of Columbia Bancorp.


                                       5


                           PLAN AND AGREEMENT TO MERGE

                                TABLE OF CONTENTS

1.  Effective Date.............................................................2
2.  Events Preceding Effectiveness.............................................2
3.  Representations and Warranties of Suburban Bancshares......................4
    3.1. Organization, Standing, and Capitalization of
         Suburban Bancshares and the Suburban Subsidiaries.....................4
    3.2. Financial Statements..................................................5
    3.3. Taxes.................................................................5
    3.4. No Undisclosed Liabilities............................................6
    3.5. Absence of Certain Changes or Events..................................6
    3.6. Complete and Accurate Disclosure......................................6
    3.7. Title to Properties; Absence of Liens and Encumbrances;
         Compliance with Laws..................................................7
    3.8. Contracts.............................................................7
    3.9. Litigation, Etc.......................................................9
    3.10.   Environmental Matters..............................................9
    3.11.   Labor Matters.....................................................11
    3.12.   Pension and Welfare Matters.......................................11
    3.13.   Related Party Transactions........................................15
    3.14.   No Conflict with Other Documents..................................15
    3.15.   Compliance with Laws; Governmental Authorizations.................15
    3.16.   Authority; Enforceability.........................................16
    3.17.   Insurance.........................................................16
    3.18.   Financial Institutions Bond.......................................16
    3.19.   Brokers; Financial Advisor........................................16
    3.20.   Beneficial Ownership of Columbia Bancorp Common Stock.............17
    3.21.   Year 2000.........................................................17
4.  Representations and Warranties of Columbia Bancorp........................17
    4.1. Organization, Standing, and Capitalization of Columbia
         Bancorp and Columbia Subsidiaries....................................17
    4.2. Financial Statements.................................................19
    4.3. Taxes................................................................19
    4.4. No Undisclosed Liabilities...........................................19
    4.5. Absence of Certain Changes or Events.................................20

                                       i
<PAGE>

    4.6. Complete and Accurate Disclosure.....................................20
    4.7. Title to Properties; Absence of Liens and Encumbrances;
         Compliance with Laws.................................................20
    4.8. Contracts............................................................21
    4.9. Litigation, Etc......................................................22
    4.10.   Environmental Matters.............................................23
    4.11.   Labor Matters.....................................................24
    4.12.   Pension and Welfare Matters.......................................24
    4.13.   Related Party Transactions........................................28
    4.14.   No Conflict with Other Documents..................................28
    4.15.   Compliance with Laws; Governmental Authorizations.................28
    4.16.   Authority; Enforceability.........................................29
    4.17.   Insurance.........................................................29
    4.18.   Financial Institutions Bond.......................................29
    4.19.   Brokers; Financial Advisor........................................29
    4.20.   Beneficial Ownership of Suburban Bancshares Common Stock..........30
    4.21.   Year 2000.........................................................30
5.  Covenants of Suburban Bancshares..........................................30
    5.1. Information..........................................................30
    5.2. Events Preceding Effectiveness.......................................31
    5.3. Regulatory Approvals.................................................31
    5.4. Conduct of Business..................................................31
    5.5. Reservation of Shares................................................32
    5.6. Meeting of Stockholders of Suburban Bancshares;
         Document Preparation.................................................32
    5.7. Consents.............................................................33
    5.8. Current Information; Advice of Changes...............................33
    5.9. No Solicitation of Other Offers......................................34
    5.10.   Affiliate Agreements..............................................35
    5.11.   Pooling-of-Interests..............................................35
    5.12.   Taxes.............................................................35
    5.13.   Public Announcements..............................................36
6.  Covenants of Columbia Bancorp.............................................36
    6.1. Information..........................................................36
    6.2. Events Preceding Effectiveness.......................................37
    6.3. Applications to Governmental Regulatory Authorities..................37


                                       ii
<PAGE>

    6.4. Conduct of Business..................................................37
    6.5. Columbia Bancorp Common Stock........................................38
    6.6. Registration of Shares...............................................38
    6.7. Meeting of Stockholders of Columbia Bancorp; Document
         Preparation..........................................................39
    6.8. Consents.............................................................40
    6.9. Current Information; Advice of Changes...............................40
    6.10.   No Solicitation of Other Offers...................................40
    6.11.   Affiliate Agreements..............................................41
    6.12.   Pooling-of-Interests..............................................41
    6.13.   Taxes.............................................................41
    6.14.   Public Announcements..............................................42
7.  Conditions Precedent to Columbia Bancorp's Obligations....................42
    7.1. Representations, Warranties, and Covenants...........................42
    7.2. No Adverse Changes...................................................42
    7.3. Events Preceding the Effective Date..................................42
    7.4. Other Evidence.......................................................43
    7.5. No Adverse Proceedings, Events, or Regulatory Requirements...........43
    7.6. Consents, Etc........................................................43
    7.7. Opinion of Tax Counsel...............................................43
    7.8. Fairness Opinion.....................................................43
    7.9. Opinion of Counsel...................................................43
    7.10.   Pooling-of-Interests Accounting...................................43
8.  Conditions Precedent to Suburban Bancshares' Obligations..................44
    8.1. Representations, Warranties, and Covenants...........................44
    8.2. No Adverse Changes...................................................44
    8.3. Events Preceding the Effective Date..................................44
    8.4. Other Evidence.......................................................44
    8.5. No Adverse Proceedings, Events, or Regulatory Requirements...........45
    8.6. Consents, Etc........................................................45
    8.7. Opinion of Tax Counsel...............................................45
    8.8. Fairness Opinion.....................................................45
    8.9. Opinion of Counsel...................................................45
9.  Terms of the Holding Company Merger.......................................45
    9.1. Structure of the Holding Company Merger..............................45
    9.2. Conversion of Stock; Conversion Ratio................................46


                                       iii
<PAGE>

    9.3. Exchange Procedure...................................................46
    9.4. Stock Options........................................................47
    9.5. Charter of the Successor Corporation.................................47
    9.6. By-Laws of the Successor Corporation.................................47
    9.7. Anti-Dilution Provision..............................................47
    9.8. Restriction on Issuance or Repurchase of Securities..................48
10. Terms of the Bank Merger..................................................48
    10.1.   Structure of the Bank Merger......................................48
    10.2.   Conversion of Stock; Conversion Ratio.............................48
    10.3.   Exchange Procedure................................................48
    10.4.   Charter of the Successor Bank.....................................48
    10.5.   By-Laws of the Successor Bank.....................................48
    10.6.   Restriction on Issuance or Repurchase of Securities...............48
11. Boards of Directors and Employment Matters................................49
12. Amendment of this Plan....................................................50
13. Abandonment of this Plan; Effect Thereof..................................50
14. Expenses..................................................................52
15. Notices...................................................................52
16. Entire Agreement; Effect..................................................52
17. Representations, Warranties, and Agreements...............................52
18. Governing Law.............................................................53
19. General...................................................................53
APPENDIX I....................................................................54
APPENDIX II...................................................................57
APPENDIX III..................................................................66
APPENDIX IV...................................................................73
APPENDIX V....................................................................80
APPENDIX VI...................................................................84
APPENDIX VII..................................................................87
APPENDIX VIII.................................................................92
APPENDIX IX...................................................................97
APPENDIX X....................................................................99
APPENDIX XI..................................................................102
APPENDIX XII.................................................................106
APPENDIX XIII................................................................108
APPENDIX XIV.................................................................110


                                       iv
<PAGE>

APPENDIX XV..................................................................112
APPENDIX XVI.................................................................123





















                                       v
<PAGE>

                           PLAN AND AGREEMENT TO MERGE

     PLAN AND AGREEMENT TO MERGE (this  "Plan"),  dated as of September 28, 1999
by and between COLUMBIA BANCORP ("Columbia  Bancorp"),  a Maryland  corporation,
and SUBURBAN BANCSHARES, INC. ("Suburban Bancshares"), a Delaware corporation.

                              W I T N E S S E T H:

     WHEREAS,  Columbia  Bancorp is a bank holding company and the holder of all
of the issued and outstanding  capital stock of Columbia Bank ("Columbia Bank"),
a Maryland  commercial  bank; and Suburban  Bancshares is a bank holding company
and the holder of all of the issued and  outstanding  capital  stock of Suburban
Bank of Maryland ("Suburban Bank"), a Maryland commercial bank; and

     WHEREAS,  Columbia  Bancorp desires to have Suburban  Bancshares merge with
Columbia  Bancorp in such a manner  that,  upon the merger  becoming  effective,
Columbia  Bancorp will be the  surviving  Maryland  corporation,  and all of the
issued and outstanding shares of the Common Stock of Suburban Bancshares will be
converted  into shares of the Common Stock of Columbia  Bancorp,  subject to the
terms  and  conditions  and based  upon  Suburban  Bancshares'  representations,
warranties,  and  covenants  hereinafter  set  forth,  such  merger  hereinafter
referred to as the "Holding Company Merger;" and

     WHEREAS, Columbia Bancorp desires to have Suburban Bank merge with Columbia
Bank in such a manner that,  upon the merger becoming  effective,  Columbia Bank
will be the  surviving  Maryland  commercial  bank,  and all of the  issued  and
outstanding  shares of the Common Stock of Suburban Bank will be converted  into
shares of the  Common  Stock of  Columbia  Bank and owned by  Columbia  Bancorp,
subject  to the  terms  and  conditions  and  based  upon  Suburban  Bancshares'
representations,  warranties,  and covenants  hereinafter set forth, such merger
hereinafter  referred  to as the "Bank  Merger,"  and with the  Holding  Company
Merger, collectively, the "Mergers;" and

     WHEREAS,  Suburban  Bancshares  desires  that it be  merged  with  Columbia
Bancorp  in the  manner set forth  above,  and that the  issued and  outstanding
shares of the Common Stock of Suburban  Bancshares  be converted  into shares of
the Common Stock of Columbia  Bancorp,  subject to the terms and  conditions and
based  upon  Columbia  Bancorp's  representations,   warranties,  and  covenants
hereinafter set forth; and

     WHEREAS,  Suburban  Bancshares  desires that  Suburban  Bank be merged with
Columbia Bank in the manner set forth above, and that the issued and outstanding
shares of the Common  Stock of  Suburban  Bank be  converted  into shares of the
Common Stock of Columbia  Bank owned by Columbia  Bancorp,  subject to the terms
and conditions and based upon Columbia  Bancorp's  representations,  warranties,
and covenants hereinafter set forth; and




<PAGE>

     NOW,  THEREFORE,  in  consideration  of the mutual covenants and agreements
herein  contained and the mutual  benefits to be derived  herefrom,  the parties
agree as follows:

     1. Effective Date.  Pursuant to MD. GENERAL  CORPORATION LAW SS.  3-113(a),
MD. FIN. INS. CODE SS. 3-709(b), and DE. GENERAL CORPORATION LAW SS. 252(c), the
effective  date of this Plan and the Mergers  (the  "Effective  Date")  shall be
eitheR (a) the first day of the month  following  the month in which the last of
the events in Section 2, Section 7 and Section 8 occurs;  or (b) such other date
as Columbia Bancorp and Suburban Bancshares may agree upon. Columbia Bancorp and
Suburban Bancshares will prepare and execute an Agreement and Articles of Merger
in  substantially  the form  attached  as  Appendix  II which will set forth the
Effective  Date,  and will file the  Agreement  and  Articles of Merger with the
Maryland State Department of Assessments and Taxation and the Delaware Secretary
of State.  Columbia Bank and Suburban Bank will prepare and execute an Agreement
of Bank Merger in substantially  the form attached as Appendix II, and will file
the Agreement of Bank Merger and the  Certificate of Merger of the  Commissioner
of  Financial  Institutions  which  will set forth the  Effective  Date with the
Maryland State Department of Assessments and Taxation.

     2. Events  Preceeding  Effectiveness.  On or before the Effective  Date the
following shall have occurred:

          (a) A  majority  of the  Boards  of  Directors  of  each  of  Suburban
     Bancshares and Columbia Bancorp shall have approved and agreed to this Plan
     and the Mergers;

          (b) A  majority  of the  Boards  of  Directors  of  each  of  Suburban
     Bancshares and Columbia Bancorp shall have approved and agreed to the Stock
     Option Agreements (the "Stock Option  Agreements") in the forms attached as
     Appendix III and Appendix IV,  respectively;  and Suburban  Bancshares  and
     Columbia  Bancorp,  respectively,  shall have  authorized  and  reserved an
     adequate number of shares of its Common Stock for issuance upon exercise of
     the option granted by such Stock Option  Agreements,  and taken all actions
     necessary to fulfill its obligations thereunder;

          (c) the Board of Directors of Suburban Bancshares shall call a meeting
     of the stockholders of Suburban Bancshares. Notice of the time and place of
     the meeting shall be provided in accordance  with DE.  GENERAL  CORPORATION
     LAW ss.  252(c),  and this Plan and the Holding  Company  Merger shall have
     been  ratified  and  confirmed by the  affirmative  vote of not less than a
     majority of the issued and outstanding voting stock of Suburban  Bancshares
     at the meeting, in accordance with DE. GENERAL CORPORATION LAW ss. 252(c);

          (d) the Board of Directors of Columbia Bancorp shall call a meeting of
     the stockholders of Columbia  Bancorp.  Notice of the time and place of the
     meeting shall be provided in accordance  with MD. GENERAL  CORPORATION  LAW


                                       2
<PAGE>

     ss.  2-504,  and this Plan and the Holding  Company  Merger shall have been
     ratified and confirmed by the affirmative  vote of not less than two-thirds
     of the issued  and  outstanding  voting  stock of  Columbia  Bancorp at the
     meeting, in accordance with MD. GENERAL CORPORATION LAW ss. 3-105(d);

          (e) the Board of Directors and the  stockholder of Columbia Bank shall
     have approved the Bank Merger in accordance  with MD. FIN. INS. CODE ss.ss.
     3-701 et seq.;

          (f) the Board of  Directors  and the  stockholder  of ' Suburban  Bank
     shall have approved the Bank Merger in  accordance  with MD. FIN. INS. CODE
     ss.ss. 3-701 et seq.;

          (g)  Columbia  Bancorp  shall have  procured  the  required  approval,
     consent,  waiver, or other administrative  action with respect to this Plan
     and the transactions  contemplated  hereby by the Board of Governors of the
     Federal  Reserve System under Section  3(a)(5) of the Bank Holding  Company
     Act of 1956, as amended;

          (h) Columbia  Bank and Suburban  Bank shall have procured the required
     approval,  consent,  waiver, or other administrative action with respect to
     this  Plan  and  the  transactions  contemplated  hereby  by  the  Maryland
     Commissioner of Financial  Regulation under MD. FIN. INS. CODE ss.ss. 5-904
     and 3-705;

          (i) Columbia  Bank and Suburban  Bank shall have procured the required
     approval,  consent,  waiver, or other administrative action with respect to
     this Plan and the transactions  contemplated  hereby by the Federal Deposit
     Insurance Corporation under Sections 18(c) and 18(d) of the Federal Deposit
     Insurance Act;

          (j) the parties  shall have procured all other  regulatory  approvals,
     consents,  waivers, or administrative  actions of governmental  entities or
     other  persons  or  agencies  that  are  necessary  or  appropriate  to the
     consummation  of  the  transactions  contemplated  by  this  Plan,  and  no
     approval,  consent,  waiver, or  administrative  action referred to in this
     Section 2(j) shall have  included any condition or  requirement  that would
     (i) result in a materially  adverse effect on Columbia  Bancorp or Suburban
     Bancshares,  or (ii) so  materially  and  adversely  affect the economic or
     business  benefits  of the  Mergers  that  Columbia  Bancorp,  in the  sole
     judgment of Columbia  Bancorp,  would not have  entered  into this Plan had
     such conditions or requirements been known at the date hereof;

          (k) Columbia  Bancorp shall have filed a  Registration  Statement with
     the Securities and Exchange Commission (the "SEC") under the Securities Act


                                       3
<PAGE>

     of 1933,  as amended (the  "Securities  Act"),  pertaining to the shares of
     Common  Stock of  Columbia  Bancorp  to be  issued to the  stockholders  of
     Suburban  Bancshares  pursuant to this Plan and the Holding Company Merger,
     and such Registration Statement shall have become effective and there shall
     not be in effect a stop order with respect thereto; and

          (l) Columbia  Bancorp  shall have made such filings and obtained  such
     approvals as are  necessary  under the state  securities or "blue sky" laws
     pertaining  to the shares of Common Stock of Columbia  Bancorp to be issued
     to the  stockholders of Suburban  Bancshares  pursuant to this Plan and the
     Mergers.

     3.  Representations  and  Warranties  of  Suburban   Bancshares.   Suburban
Bancshares represents and warrants to Columbia Bancorp as follows:

          3.1. Organization, Standing, and Capitalization of Suburban Bancshares
and the Suburban  Subsidiaries.  (a) Suburban Bancshares is a duly organized and
validly existing corporation and is in good standing under the laws of the State
of Delaware.  Suburban  Bancshares has the corporate  power and authority to own
and hold its material properties and to carry on its business as it is now being
conducted.  Suburban  Bancshares is a registered  bank holding company under the
Bank  Holding  Company  Act of 1956,  as  amended.  Suburban  Bancshares  has no
subsidiaries or affiliated  companies and is not a party to any joint venture or
partnership other than as listed on Schedule 3.1(a) (collectively, the "Suburban
Subsidiaries").

          (b) Suburban Bank is a duly  organized and validly  existing  Maryland
commercial bank and is in good standing under the laws of the State of Maryland.
The deposits of Suburban  Bank are insured  under the  provisions of the Federal
Deposit Insurance Act, as amended.  Each of the other Suburban Subsidiaries is a
duly organized and validly  existing  corporation or other entity and is in good
standing under the laws of the jurisdiction of its incorporation or organization
as set forth on Schedule 3.1(a). Each of the Suburban Subsidiaries has the power
(corporate or other) and authority to own and hold its material  properties  and
to carry on its business as it is now being conducted. All outstanding shares of
capital stock or other equity interests of all of the Suburban  Subsidiaries are
validly issued, fully paid, and non-assessable.  Except as disclosed in Schedule
3.1(b), each of the Suburban  Subsidiaries is wholly owned by its parent.  There
are no  outstanding  options,  warrants,  rights,  or  obligations  of any  kind
entitling  the holder  thereof to acquire  shares of the capital  stock or other
equity  interests  of  any  of  the  Suburban  Subsidiaries,  and  there  are no
outstanding  securities or  instruments  of any kind that are  convertible  into
shares of the capital  stock or other  equity  interests  of any of the Suburban
Subsidiaries.  Except as  disclosed  in Schedule  3.1(b),  none of the  Suburban
Subsidiaries is a party to any joint venture or partnership.

          (c) Copies of all  organizational  documents  and  by-laws of Suburban
Bancshares  and each of the  Suburban  Subsidiaries  are  attached  as  Schedule
3.1(c),  and all such  copies are true and  correct as of the date  hereof.  The
minute books of Suburban Bancshares and each of the Suburban Subsidiaries, which


                                       4
<PAGE>

have been made available to Columbia Bancorp for inspection, are complete in all
material  respects and accurately  record the actions taken by the  stockholders
and directors of Suburban Bancshares and each of the Suburban Subsidiaries.

          (d) The  authorized  capital  stock of  Suburban  Bancshares  consists
exclusively  of  20,000,000  shares of Common  Stock,  par value $.01 per share,
11,301,218 of which shares are  outstanding at September 17, 1999, and 1,000,000
shares of Preferred  Stock,  par value $.01 per share,  none of which shares are
issued or outstanding.  All  outstanding  shares of Suburban  Bancshares  Common
Stock are validly issued,  fully paid, and non assessable.  Suburban  Bancshares
has reserved  500,000  shares of its Common  Stock for issuance  under its Stock
Option Plans. On September 17, 1999, there were outstanding  options to purchase
491,134  shares of Suburban  Bancshares'  Common  Stock at prices  ranging  from
$2.59375 to $5.625  pursuant to these Stock Option Plans.  Except for the option
to be  granted  to  Columbia  Bancorp  pursuant  to the Stock  Option  Agreement
attached as Appendix III and as disclosed in Schedule 3.1(d), there are no other
outstanding options,  warrants, rights, or obligations of any kind entitling the
holder thereof to acquire shares of the Common Stock of Suburban Bancshares, and
there  are no  outstanding  securities  or  instruments  of any  kind  that  are
convertible into shares of the Common Stock of Suburban Bancshares.

          3.2.  Financial  Statements.   Suburban  Bancshares  has  provided  in
Schedule  3.2  copies  of the  Consolidated  Financial  Statements  of  Suburban
Bancshares and the Suburban Subsidiaries at December 31, 1994, 1995, 1996, 1997,
and 1998 and for each of the years then  ended,  as  reported  upon by Stegman &
Company,  and at June 30,  1998 and 1999 and for each of the six  month  periods
then ended,  all of which are true and complete in all material  respects,  have
been  prepared in  accordance  with  generally  accepted  accounting  principles
consistently  followed  throughout  the  periods  covered  by such  consolidated
financial  statements  and present  fairly the  financial  position,  results of
operations,  cash  flows,  and  changes  in  stockholders'  equity  of  Suburban
Bancshares  and the  Suburban  Subsidiaries  at the dates of and for the periods
covered by such financial statements.

          3.3. Taxes. Schedule 3.3 sets forth the tax returns to federal, state,
county,  municipal,  or foreign  taxing  authorities  for the taxable year ended
December 31, 1994 and all taxable years through and including  December 31, 1998
for Suburban Bancshares and the Suburban  Subsidiaries.  Suburban Bancshares and
the Suburban  Subsidiaries have filed with appropriate  federal,  state, county,
municipal,  or foreign taxing  authorities all tax returns  required to be filed
(taking any applicable  extensions into consideration) and have paid or reserved
for all taxes shown to be due on such  returns and all  penalties  and  interest
payable in  respect  thereof.  Except as  disclosed  in  Schedule  3.3,  neither
Suburban Bancshares nor any of the Suburban  Subsidiaries have received from any
taxing  authority any notice of deficiency or assessment of additional taxes not
paid or any notice of an  intention to commence an  examination  or audit of its
tax returns, and no tax audits by any taxing authority are in process. Except as
disclosed on Schedule 3.3, neither  Suburban  Bancshares nor any of the Suburban
Subsidiaries  have granted any waiver of any statute of limitations or otherwise
agreed to any extension of a period for the  assessment  of any federal,  state,
county, municipal, or foreign income tax. The accruals and reserves reflected in
the consolidated  financial statements which Suburban Bancshares has provided to
Columbia  Bancorp as  described  in Section 3.2 are  adequate to cover all taxes


                                       5
<PAGE>

(including interest and penalties,  if any, thereon) that are payable or accrued
as  a  result  of  the  operations  of  Suburban  Bancshares  and  the  Suburban
Subsidiaries  for all periods prior to the date of such  consolidated  financial
statements.  For purposes of this  Section  3.3,  any  reference to the Suburban
Subsidiaries  shall be deemed to include any entity  listed on Schedules  3.1(a)
and 3.1 (b).

          3.4. No Undisclosed Liabilities. Except as and to the extent reflected
or reserved  against in the  consolidated  financial  statements  referred to in
Section 3.2, neither Suburban Bancshares nor any of the Suburban Subsidiaries at
the dates of such consolidated financial statements had any material liabilities
or  obligations  (whether  accrued,  absolute,  or  contingent)  required  under
generally  accepted  accounting  principles to be reflected  thereon which would
materially  and  adversely  affect  the  fair  presentation  of  such  financial
statements. Neither Suburban Bancshares nor any of the Suburban Subsidiaries has
incurred any liability since the date of the consolidated  financial  statements
referred to in Section  3.2  (including  any  liability  for taxes)  which would
materially and adversely affect the condition (financial or otherwise),  assets,
liabilities,  business,  or operations of Suburban  Bancshares  and the Suburban
Subsidiaries,  taken as a whole, other than liabilities which have been incurred
in the ordinary course of business.

          3.5. Except as setforth in Schedule 3.5, since December 31, 1998 there
has not been:

               (a) Any  materially  adverse  change in the  financial  position,
     results  of  operations,  assets,  liabilities,  or  business  of  Suburban
     Bancshares or the Suburban Subsidiaries, other than changes in the ordinary
     course of business;

               (b) any increase in salaries or wages of directors,  officers, or
     employees of Suburban Bancshares or the Suburban Subsidiaries other than in
     the ordinary course of business;  or any  establishment  or increase of any
     employment,  compensation,  bonus, pension,  option,  incentive or deferred
     compensation,  retirement payments, profit sharing, or similar agreement or
     benefit,  authorized,  granted, or accrued to any directors,  officers,  or
     employees of Suburban Bancshares or the Suburban Subsidiaries other than in
     the ordinary course of business; or

               (c) any declaration, payment, or set aside by Suburban Bancshares
     of any  dividend or  distribution  in respect of its Common  Stock,  or any
     purchase, issuance, or sale of any of its Common Stock.

          3.6. Complete and Accurate  Disclosure.  Neither this Plan (insofar as
it relates to Suburban  Bancshares  and the  Suburban  Subsidiaries,  the Common
Stock of Suburban Bancshares,  and the involvement of Suburban Bancshares in the
transactions  contemplated  hereby)  nor  any  financial  statement,   schedule,


                                       6
<PAGE>

certificate, or other statement or document set forth on a schedule delivered by
Suburban  Bancshares  to Columbia  Bancorp in  connection  with this Plan,  when
considered in the aggregate,  contains any statement  which,  at the time and in
light of the  circumstances  under which it is made, is false or misleading with
respect to any material  fact or omits to state any material  fact  necessary to
make the statements contained herein or therein not false or misleading.

          3.7.  Title  to  Properties;   Absence  of  Liens  and   Encumbrances;
Compliance with Laws. Except as disclosed on Schedule 3.7,  Suburban  Bancshares
and each of the Suburban  Subsidiaries  has good and marketable  title to all of
their  respective  properties  and  assets,  including  those  reflected  in the
consolidated  financial statements referred to in Section 3.2, except as sold or
otherwise  disposed  of for  fair  value  and  only in the  ordinary  course  of
business, free and clear of all liens and encumbrances,  except (i) with respect
to property as to which they are lessees, (ii) with respect to real estate owned
by Suburban Bancshares or the Suburban  Subsidiaries,  for use,  occupancy,  and
similar  restrictions  of public record that may be observed by an inspection of
the property,  and such other utility and other easements and encumbrances as do
not materially adversely affect the fair market value of such real property, and
(iii) liens to secure borrowings,  liens to secure  governmental  deposits,  and
liens for current taxes not yet due and payable. Neither Suburban Bancshares nor
any of the  Suburban  Subsidiaries  owns  or  leases  real  property  except  as
disclosed  on Schedule  3.7, and is not in default  under any material  lease of
real or personal property to which it is a party. As of the date hereof,  except
as  disclosed  on Schedule  3.7,  the real  properties,  structures,  buildings,
equipment,  and the tangible  personal  property owned,  operated,  or leased by
Suburban Bancshares or any of the Suburban  Subsidiaries are (x) in good repair,
order, and condition, except for depletion,  depreciation, and ordinary wear and
tear, (y) suitable for the uses for which they were intended,  and (z) free from
any  known  structural  defects.  As of the  date  hereof,  there  are no  laws,
conditions of record, or other  impediments which materially  interfere with the
intended uses by Suburban Bancshares or any of the Suburban  Subsidiaries of the
real property or tangible personal property owned or leased by it, except as set
forth in Schedule  3.7.  Neither  Suburban  Bancshares  nor any of the  Suburban
Subsidiaries  have received any notice of any violation of any  applicable  law,
building code, zoning ordinance,  or other similar law. Suburban  Bancshares and
the  Suburban  Subsidiaries  own or have the rights to use all real and personal
properties  and assets that are  material to the conduct of the  business as now
conducted  of Suburban  Bancshares  and the  Suburban  Subsidiaries,  taken as a
whole.

          3.8.  Contracts.  Except for the plans,  contracts,  and agreements of
Suburban Bancshares and the Suburban  Subsidiaries (or of any plan under Section
3.8(b))  disclosed on Schedule 3.8, neither  Suburban  Bancshares nor any of the
Suburban Subsidiaries(nor any plan under Section 3.8(b))is a party to or subject
to:

               (a) Any employment,  consultation,  or  compensation  contract or
     arrangement  (other  than  those  terminable  at will)  with  any  officer,
     consultant,  director,  or  employee;



                                       7
<PAGE>

               (b) any plan,  contract,  program,  understanding,  or  agreement
     providing for bonuses,  pensions,  severance pay,  executive  compensation,
     options,  stock  purchases,  or any other form of retirement,  incentive or
     deferred compensation, retirement payments, death benefits, profit sharing,
     branch closing benefits,  workers'  compensation,  tuition reimbursement or
     scholarship  program, any plans providing benefits or payments in the event
     of a change in  control,  change  in  ownership,  or sale of a  substantial
     portion  (including  all or  substantially  all) of the assets of  Suburban
     Bancshares or any of the Suburban  Subsidiaries,  or any health,  accident,
     disability,  sick leave,  vacation  pay, life  insurance,  or other welfare
     benefit,  or any other  employee or retired  employee  benefit  (including,
     without limitation,  any "employee benefit plan" as defined in Section 3(3)
     of the  Employee  Retirement  Income  Security  Act  of  1974,  as  amended
     ("ERISA")) in which any current or former employee,  director, or agent (or
     beneficiary  of any of them) of Suburban  Bancshares or any of the Suburban
     Subsidiaries is or was, within the last six years, entitled to participate;

               (c) any contract or agreement with any labor union;

               (d) any lease of real or personal property with annual rentals in
     excess of $5,000;

               (e) any  agreement  for services in excess of $10,000 per year or
     for the  purchase  or  disposition  of any  equipment  or  supplies  except
     individual  purchase  orders for office  supplies  incurred in the ordinary
     course of business of $10,000 or less;

               (f) any  instrument  evidencing or relating to  indebtedness  for
     borrowed  money except for customer  accounts,  deposits,  certificates  of
     deposit,  federal funds  purchased,  and the like which may be construed as
     borrowings  and  except for loans  made by  Suburban  Bank as lender in the
     ordinary course of its business;

               (g) any lease or other contract containing covenants not to enter
     into or consummate the transactions  contemplated  hereby or which provides
     for payments in excess of $2,000 and will be  terminated or violated by the
     Mergers  or in  respect  of which the  Mergers  would  cause a  default  or
     acceleration of obligations; or

               (h) any other  contract or  agreement  not of the type covered by
     any of the other  specific  terms of this Section 3.8  obligating  Suburban
     Bancshares or any Suburban Subsidiary to expenditures in excess of $25,000.

Each of the instruments disclosed on Schedule 3.8 is valid and in full force and
effect.  Neither Suburban Bancshares nor any of the Suburban Subsidiaries are in


                                       8
<PAGE>

default nor have any of them  received any notice that they are in default,  nor
to their  actual  knowledge  is any other party in default,  under any  material
agreements,  instruments,  or obligations to which Suburban Bancshares or any of
the Suburban Subsidiaries is a party or by which they are bound.

          3.9.  Litigation,  Etc. Except as disclosed on Schedule 3.9, (a) there
is no litigation,  proceeding,  or investigation pending or, to the knowledge of
Suburban  Bancshares,  threatened  against  Suburban  Bancshares  or  any of the
Suburban Subsidiaries which would result in any materially adverse change in the
condition (financial or otherwise),  assets, liabilities,  business, operations,
or future prospects of Suburban Bancshares and the Suburban Subsidiaries,  taken
as a whole; (b) there are no outstanding orders, writs, injunctions,  judgments,
decrees, directives, consent agreements, or memoranda of understanding issued by
any federal,  state,  or local court or  governmental  authority or  arbitration
tribunal issued against or with the consent of Suburban Bancshares or any of the
Suburban  Subsidiaries  that  materially  and  adversely  affect  the  condition
(financial or otherwise),  assets, liabilities,  business, operations, or future
prospects or that in any manner restrict Suburban  Bancshares' right to carry on
its  business or that of the Suburban  Subsidiaries  as now  conducted;  and (c)
Suburban  Bancshares  is aware of no fact or condition  now existing  that might
give rise to any litigation,  investigation,  or proceeding which, if determined
adversely  to Suburban  Bancshares  or any of the Suburban  Subsidiaries,  would
materially and adversely affect the condition (financial or otherwise),  assets,
liabilities,  business,  operations,  or future prospects of Suburban Bancshares
and the Suburban Subsidiaries, taken as a whole, or would restrict in any manner
Suburban  Bancshares'  right to carry on its  business  or that of the  Suburban
Subsidiaries as now conducted. Suburban Bancshares has disclosed on Schedule 3.9
all litigation in which Suburban Bancshares or any of the Suburban  Subsidiaries
is involved as a party  (other than  bankruptcy  proceedings  in which  Suburban
Bancshares  or any of the  Suburban  Subsidiaries  has filed  proofs of claim or
routine  collection and  foreclosure  suits  initiated in the ordinary course of
business).

          3.10.  Environmental  Matters.  (a) The following terms shall have the
indicated meaning:

               "Property" or "Properties"  means all branch  properties now
     or formerly  owned or operated,  all other real  property now owned or
     operated,  and any real properties  owned or operated on or after July
     1, 1991 and subsequently disposed of.

               "Environmental Law" means (i) any applicable federal, state,
     or local statute,  law, ordinance,  rule,  regulation,  code, license,
     permit,  authorization,  approval,  consent, order, judgment,  decree,
     directive,  requirement,  or  agreement  with any court,  governmental
     authority, or other regulatory or administrative agency or commission,
     domestic or foreign ("Governmental Entity") now existing,  relating to
     the use, storage, treatment, generation,  transportation,  processing,
     handling,  labeling,  production,  release,  or disposal of  Hazardous


                                       9
<PAGE>

     Substances,  each as  amended,  or (ii) any common law that may impose
     liability or  obligations  for injuries or damages due to the presence
     of or exposure to any Hazardous Substance.

               "Hazardous  Substance" means any substance,  whether liquid,
     solid,  or  gas,  listed,  defined,   designated,   or  classified  as
     hazardous,  toxic,  radioactive,  or  dangerous  under any  applicable
     Environmental Law, whether by type or by quantity. Hazardous Substance
     includes,  without limitation, any "hazardous substance" as defined in
     the Comprehensive  Environmental Response,  Compensation and Liability
     Act, as amended,  and any other substance  regulated or subject to any
     federal environmental statute, including, but not limited to the Toxic
     Substance  Control Act,  Clean Water Act, Clean Air Act, Oil Pollution
     Act and Resource  Conservation  and Recovery  Act, or a similar  state
     statute, regardless of the amount of the Hazardous Substance.

          (b) Except as disclosed on Schedule 3.10 or as would not  individually
or in the aggregate have a materially adverse effect on the condition (financial
or  otherwise),  assets,  liabilities,   business,  or  operations  of  Suburban
Bancshares and the Suburban Subsidiaries, taken as a whole:

               (i)  neither  Suburban  Bancshares  nor any of the  Suburban
     Subsidiaries  has received any written  notices,  demand  letters,  or
     written requests for information  from any Governmental  Entity or any
     third  party  indicating  that  Suburban  Bancshares  or any  Suburban
     Subsidiary may be in violation of, or liable under, any  Environmental
     Law;

               (ii)  there  are  no  civil,   criminal,  or  administrative
     actions,  suits,  demands,   claims,  hearings,   investigations,   or
     proceedings  pending  or  to  the  knowledge  of  Suburban  Bancshares
     threatened  against  Suburban  Bancshares  or any Suburban  Subsidiary
     alleging  that  they may be in  violation  of, or  liable  under,  any
     Environmental Law;

               (iii) no  reports  have  been  filed  with any  Governmental
     Entity,  nor to the knowledge of Suburban  Bancshares  are any reports
     required  to be  filed  with  any  Governmental  Entity,  by  Suburban
     Bancshares or any of the Suburban Subsidiaries  concerning the release
     of any Hazardous  Substance or the violation of any  Environmental Law
     on or at any of the  Properties  of Suburban  Bancshares or any of the
     Suburban Subsidiaries;

               (iv) to the  knowledge of Suburban  Bancshares  or except as
     disclosed on Schedule 3.10, there are no underground storage tanks on,
     in, or under any of the  Properties  of Suburban  Bancshares or any of
     the Suburban Subsidiaries,  and no underground storage tanks have been
     closed or removed from any Property of Suburban  Bancshares  or any of


                                       10
<PAGE>

     the Suburban Subsidiaries while such Property was owned or operated by
     Suburban Bancshares or any of the Suburban Subsidiaries;

               (v) to the  knowledge  of Suburban  Bancshares  or except as
     disclosed on Schedule 3.10, no Hazardous Substance has been generated,
     used, stored, processed,  disposed of, or discharged on or into any of
     the  Properties  of  Suburban   Bancshares  or  any  of  the  Suburban
     Subsidiaries,  except for such hazardous  substances as may be used in
     the everyday business of a bank office; and

               (vi) to the  knowledge of Suburban  Bancshares  or except as
     disclosed on Schedule 3.10, no materials containing asbestos have been
     used or incorporated in any building or other structure or improvement
     located on any of the Properties of Suburban  Bancshares or any of the
     Suburban Subsidiaries.

          (c) There are no  permits  or  licenses  or agency  filings or reports
required under any  Environmental Law in respect of any of the Properties now or
formerly  owned  or  operated  by  Suburban  Bancshares  or any of the  Suburban
Subsidiaries that the absence of which could,  individually or in the aggregate,
have a materially  adverse  effect on the condition  (financial  or  otherwise),
assets,  liabilities,  business,  or operations of Suburban  Bancshares  and the
Suburban Subsidiaries, taken as a whole.

          (d) Suburban  Bancshares  has disclosed on Schedule 3.10 a copy of its
current policy regarding compliance with Environmental Laws.

          3.11.   Labor  Matters.   To  Suburban   Bancshares'   knowledge,   no
organization  effort with respect to any of the employees of Suburban Bancshares
or any of the  Suburban  Subsidiaries  is  pending or  threatened,  and no labor
dispute, strike, work stoppage, employee action, or labor relation problem which
may materially  affect Suburban  Bancshares or any of the Suburban  Subsidiaries
currently is pending or threatened. Suburban Bancshares and each of the Suburban
Subsidiaries  have at all  times  in all  material  respects  complied  with all
applicable employee termination notice and similar laws. Suburban Bancshares and
each of the  Suburban  Subsidiaries  have at all times  complied in all material
respects  with  all  applicable  family  medical  leave  and  similar  laws.  If
applicable,  Suburban  Bancshares and each of the Suburban  Subsidiaries have at
all times complied in all material respects with all applicable  requirements of
the Worker  Adjustment  and  Retraining  Notification  Act and all similar state
laws.

          3.12.  Pension  and  Welfare  Matters.  With  respect  to  the  plans,
contracts,  programs,  understandings,  or  agreements  identified  pursuant  to
Sections 3.8(a) and (b) (for purposes of this Section 3.12, the "plans"):

               (a) Schedule 3.12 clearly  identifies all of the plans which
     are (i) Multiemployer  Plans (as defined in (l) below),  (ii) multiple
     employer  plans subject to Sections 4063 and 4064 of ERISA  ("Multiple


                                       11
<PAGE>

     Employer  Plans"),  (iii)  plans  other than  Multiemployer  Plans and
     Multiple  Employer  Plans  that  are  subject  to  Section  412 of the
     Internal  Revenue Code of 1986,  as amended (the  "Code"),  (iv) plans
     intended to qualify  under  Section 401 of the Code,  and (v) "welfare
     benefit  plans"  within the  meaning of  Section  3(1) of ERISA  which
     provide for continuing benefits or coverage for any participant or any
     beneficiary of a participant after such  participant's  termination of
     employment  except  coverage or benefits  required by Section 4980B of
     the Code if paid 100% by the participant;

               (b) true,  correct  and  complete  copies  of the  following
     documents,  with respect to each of the plans have been made available
     or delivered to Columbia  Bancorp:  (i) all plan documents,  including
     trust  agreements,  insurance  policies,  loan documents,  and service
     agreements and amendments thereto, (ii) the most recent Forms 5500 and
     any  financial  statements  attached  thereto  and those for the prior
     three years,  (iii) the last Internal  Revenue  Service  determination
     letter and the  application  with respect  thereto,  (iv) summary plan
     descriptions,  (v) the most recent actuarial  statements and those for
     the prior three years,  (vi) written  descriptions  of all non-written
     agreements  relating to any such plan,  as  applicable,  for  Suburban
     Bancshares  and  each of the  Suburban  Subsidiaries,  and  (vii)  all
     filings  with a  governmental  agency or entity  within the last three
     years, including,  without limitation,  filings under the voluntary or
     other  compliance  programs  of the  U.S.  Department  of Labor or the
     Internal Revenue Service;

               (c) each of the  plans  has been  operated  in all  material
     respects  in  accordance  with its  terms and in  accordance  with all
     applicable  laws including,  but not limited to, the ERISA,  the Code,
     the Consolidated Omnibus Budget Reconciliation Act of 1985, the Health
     Insurance Portability and Accountability Act of 1996, and state health
     care continuation laws;

               (d) all  reporting  and  disclosure  requirements  of  ERISA
     imposed  upon each such plan have been  complied  with in all material
     respects,  and all required  governmental  filings have been made with
     respect to the plans;

               (e) none of (i) the plans,  (ii) the Suburban  Subsidiaries,
     and (iii) Suburban Bancshares,  and to Suburban Bancshares' knowledge,
     (x) no  current  or former  director,  officer,  employee,  agent,  or
     representative   of  Suburban   Bancshares  or  any  of  the  Suburban
     Subsidiaries, and (y) no fiduciary, "party in interest" (as defined in
     Section  3(14) of ERISA)  or  "disqualified  person"  (as  defined  in
     Section 4975 of the Code) with respect to any of the plans has engaged
     in any non-exempt  "prohibited  transaction" in connection with any of
     the plans  within the meaning of Section  4975 of the Code or Title I,
     Part 4 of ERISA;

               (f) none of the plans has any accumulated funding deficiency
     (as  defined in  Section  302 of ERISA and  Section  412 of the Code),


                                       12
<PAGE>

     whether or not waived, with respect to the latest five plan years, nor
     any liability to the Pension Benefit Guaranty Corporation (the "PBGC")
     (other than normal premium payments);

               (g) with  respect  to plans  which  are  pension  plans  (as
     defined in Section  3(2) of ERISA)  subject to Title IV of ERISA,  the
     assets of each such funded plans equal or exceed the  liabilities  (as
     defined in Section  4001(a)(16)  of ERISA)  under such plans when such
     liabilities are valued on a termination  basis using PBGC interest and
     other assumptions;

               (h) no  contributions  to any of  the  plans  from  Suburban
     Bancshares or any of the Suburban  Subsidiaries are currently past due
     and, if applicable,  all past service and other liabilities  currently
     existing  but  payable in the future,  if any,  are  reflected  in the
     latest actuarial report in accordance with sound actuarial principles;

               (i) no  audits,  proceedings,  investigations,  filings,  or
     other matters (excluding any determination letter application that has
     been or may be filed prior to the Effective  Date) are pending  before
     the IRS,  the  Department  of  Labor,  the  PBGC,  or other  public or
     quasi-public body in connection with any such plans;

               (j) each plan intended to qualify  under  Section  401(a) of
     the Code is so qualified and the trust maintained  pursuant thereto is
     exempt  from  taxation  under  Section 501 of the Code and nothing has
     occurred with respect to the operation or  administration of such plan
     which would cause the loss of such  qualification  or exemption or the
     imposition of any liability,  penalty,  or tax under ERISA or the Code
     that could reasonably be expected to have a material adverse effect on
     the condition (financial or otherwise), assets, liabilities, business,
     or operations of Suburban  Bancshares  and the Suburban  Subsidiaries,
     taken as a whole, or on such plan;

               (k)  except as  disclosed  in  Schedule  3.12,  through  the
     Effective Date, there will be no changes in the operation of the plans
     or in the  documents  constituting  or affecting  the plans except for
     amendments and operational changes required by applicable law which do
     not materially increase the cost of such plans;

               (l) no employees,  former employees, or retired employees of
     Suburban Bancshares or any of the Suburban  Subsidiaries,  as a result
     of their  employment  with Suburban  Bancshares or any of the Suburban
     Subsidiaries,  are participants in any "multiemployer plan" which is a
     "pension  plan," as such terms are defined in Sections  3(37) and 3(2)
     of ERISA,  respectively,  ("Multiemployer  Plan") and neither Suburban
     Bancshares  nor any of the  Suburban  Subsidiaries  has  any  current,
     contingent or potential liability with respect to any such plan;



                                       13
<PAGE>

               (m) no  "reportable  event,"  as  such  term is  defined  in
     Section 4043(c) of ERISA,  has occurred with respect to any plan since
     the effective date of ERISA,  other than a reportable  event for which
     the 30 days notice  requirement under regulations of the PBGC has been
     waived;

               (n) there are no pending or threatened claims by or disputes
     with any  participants  or  beneficiaries  of the plans,  except  plan
     benefit  claims  arising in the normal course of the operations of the
     plans (other than terminated plans) and as to which no dispute exists;

               (o) Suburban  Bancshares has no knowledge of any facts which
     could give rise to any claims against any plan or any fiduciary of any
     plan,  except for plan benefit  claims arising in the normal course of
     the operations of the plans (other than terminated plans);

               (p)  neither  Suburban  Bancshares  nor any of the  Suburban
     Subsidiaries  nor any  fiduciary  of any plan has given  notice to any
     fiduciary  liability  insurer  of any  claims or  potential  claims in
     connection with any of the plans;

               (q) except as disclosed in Schedule 3.12,  each of the plans
     which benefit retired  employees of Suburban  Bancshares or any of the
     Suburban Subsidiaries may effectively be terminated or amended, in any
     manner and at any time, without further liability to its participants,
     by its sponsoring employer;

               (r)  neither  Suburban  Bancshares  nor any of the  Suburban
     Subsidiaries has provided, nor is required to provide, security to any
     pension  plan  or to any  single-employer  plan  pursuant  to  Section
     401(a)(29) of the Code or Section 307 of ERISA;

               (s)  there  has  been no  announcement  or  legally  binding
     commitment by Suburban Bancshares or any of the Suburban  Subsidiaries
     to create an additional plan, or to amend a plan except for amendments
     required by applicable law which do not  materially  increase the cost
     of such plan;

               (t) as to any terminated  plans,  all  obligations  for plan
     benefits or other liabilities have been satisfied in full;

               (u) none of the plans  contains  any  provision  which would
     prohibit the transactions  contemplated by this Plan or which,  except
     as  disclosed  in  Schedule  3.12,  would give rise to any  severance,
     termination,  or other payments or liabilities,  or any forgiveness of
     indebtedness,   vesting,   distribution,   increase  in  benefits,  or
     obligations  to  fund  benefits  as  a  result  of  the   transactions


                                       14
<PAGE>

     contemplated  by this Plan;  no payment that is owed or may become due
     any director,  officer,  employee,  or agent of Suburban Bancshares or
     any of the Suburban  Subsidiaries  in  connection  with a plan will be
     non-deductible  to the payor under Section 280G of the Code,  and none
     of  the  Suburban  Subsidiaries,   Columbia   Subsidiaries,   Suburban
     Bancshares,  and  Columbia  Bancorp  will be required to "gross up" or
     otherwise  compensate any person in connection  with a plan because of
     the imposition of any excise tax under Section 4999 of the Code; and

               (v) no plan is funded by,  associated  with, or related to a
     "voluntary employees'  beneficiary  association" within the meaning of
     Section 501(c)(9) of the Code.

          3.13.  Related  Party  Transactions.  Except as  disclosed on Schedule
3.13, neither Suburban  Bancshares nor any of the Suburban  Subsidiaries has any
contract,  extension of credit,  business arrangement,  or other relationship of
any  kind  with any of the  following  persons:  (a) any  executive  officer  or
director of Suburban  Bancshares  or any of the Suburban  Subsidiaries;  (b) any
stockholder  owning  five  percent or more of the  outstanding  Common  Stock of
Suburban Bancshares;  or (c) any "affiliate" (as defined in the SEC Rule 405) of
the foregoing  persons or any business in which any of the foregoing  persons is
an officer, director, employee, or five percent or greater equity owner.

          3.14.  No  Conflict  with  Other  Documents.  Except as  disclosed  on
Schedule 3.14,  neither the execution and delivery of this Plan nor the carrying
out of the  transactions  contemplated  hereunder  will result in any violation,
termination, or default or acceleration of, or be in conflict with, any terms of
any contract or other  instrument  to which  Suburban  Bancshares  or any of the
Suburban  Subsidiaries  is a  party,  or  of  any  judgment,  decree,  or  order
applicable to Suburban Bancshares or any of the Suburban Subsidiaries, or result
in the creation of any lien, charge, or encumbrance upon any of their properties
or  assets,  except  for any of the  foregoing  which  would not have a material
adverse effect upon the condition (financial or otherwise), assets, liabilities,
business,  or operations of Suburban  Bancshares and the Suburban  Subsidiaries,
taken as a whole.

          3.15. Compliance with Laws;  Governmental  Authorizations.  (a) Except
where  noncompliance  would not have a  material  and  adverse  effect  upon the
condition (financial or otherwise), assets, liabilities, business, or operations
of Suburban  Bancshares  and the Suburban  Subsidiaries,  taken as a whole,  (i)
Suburban Bancshares and each of the Suburban Subsidiaries are in compliance with
all statutes, laws, ordinances, rules, regulations,  judgments, orders, decrees,
directives,   consent   agreements,   memoranda   of   understanding,   permits,
concessions, grants franchises,  licenses, and other governmental authorizations
or approvals applicable to Suburban Bancshares,  the Suburban  Subsidiaries,  or
any of their properties; and (ii) all permits, concessions,  grants, franchises,
licenses, and other governmental  authorizations and approvals necessary for the


                                       15
<PAGE>

conduct of the business of Suburban Bancshares and the Suburban  Subsidiaries as
now  conducted  have been duly  obtained  and are in full force and effect,  and
there  are  no  proceedings  pending  or,  to  Suburban  Bancshares'  knowledge,
threatened  which may result in the  revocation,  cancellation,  suspension,  or
materially adverse modification of any thereof.

          (b) Suburban  Bancshares has filed all reports that it was required to
file with the SEC under the  Securities  Exchange  Act of 1934,  as amended (the
"Exchange  Act"),  all of  which  complied  in all  material  respects  with all
applicable  requirements  of the  Exchange  Act and the  rules  and  regulations
adopted thereunder.  As of their respective dates, each such report,  statement,
form, or other document,  including without limitation, any financial statements
or  schedules  included  therein,  did not  contain  any untrue  statement  of a
material fact or omit to state a material fact required to be stated  therein or
necessary to make the statements  therein,  in light of the circumstances  under
which they were made, not misleading,  provided,  that information as of a later
date shall be deemed to modify information as of an earlier date.

          3.16.  Auathority;   Enforceability.   The  execution,  delivery,  and
performance  of this Plan by  Suburban  Bancshares  have  been duly and  validly
authorized by its Board of Directors,  subject only to requisite approval by the
stockholders  of Suburban  Bancshares and  appropriate  governmental  regulatory
authorities.  This Plan is a valid and binding agreement of Suburban Bancshares,
enforceable  against it in accordance with its terms,  subject as to enforcement
to bankruptcy, insolvency, fraudulent transfer, reorganization,  moratorium, and
similar laws of general applicability relating to or affecting creditors' rights
and to general equity principles.

          3.17.  Insurance.  All insurance policies held by Suburban  Bancshares
and the Suburban  Subsidiaries  relating to their  operations  (except for title
insurance  policies),  including without  limitation all financial  institutions
bonds,  are set forth on Schedule  3.17. All such policies are in full force and
effect.  Neither  Suburban  Bancshares nor any of the Suburban  Subsidiaries has
received any notice of cancellation with respect to any such policies and has no
reason to expect that it will receive a notice of  cancellation  from any of its
present insurance carriers; provided, however, that Suburban Bancshares makes no
representation  as to the  effect of this  Plan or the  Mergers  on its  present
financial institutions bond or bonds.

          3.18.  Financial  Institutions  Bond. Since January 1, 1993,  Suburban
Bancshares and the Suburban  Subsidiaries have  continuously  maintained in full
force and effect one or more  financial  institutions  bonds  insuring  Suburban
Bancshares and the Suburban  Subsidiaries  against acts of dishonesty by each of
their employees. No claim has been made under any such bond since such date, and
Suburban  Bancshares  is not aware of any fact or condition  now existing  which
forms the basis of a claim  under any such  bond.  Suburban  Bancshares  and the
Suburban  Subsidiaries  have no reason to expect  that their  present  financial
institutions bond or bonds will not be renewed by their carrier on substantially
the  same  terms  as those  now in  effect;  provided,  however,  that  Suburban
Bancshares makes no  representation as to the effect of this Plan or the Mergers
on its present financial institutions bond or bonds.

          3.19. Brokers;  Financial Advisor.  All negotiations  relating to this
Plan  and the  transactions  contemplated  hereunder  have  been  carried  on by


                                       16
<PAGE>

Suburban  Bancshares  directly or through its counsel or financial advisor,  and
there has been no  intervention  of any  person as the  result of any  action of
Suburban  Bancshares  (and,  so  far  as  known  to  Suburban   Bancshares,   no
intervention  of any other  person) in such  manner as to give rise to any valid
claim  against any of the parties  hereto for a brokerage  commission,  finder's
fee, or other like  payment  (other  than to its  financial  advisor,  Danielson
Associates  Inc.).  Schedule  3.19 is a copy  of the  agreement  with  Danielson
Associates Inc., which has been engaged by Suburban  Bancshares as its financial
advisor  and to  deliver  an  opinion  as to the  fairness  of the  transactions
contemplated by this Plan to Suburban Bancshares.

          3.20. Beneficial ownership of Columbia Bancorp Common Stock. As of the
date  hereof,  Suburban  Bancshares  does not  beneficially  own any  shares  of
Columbia Bancorp Common Stock or have any option,  warrant, or right of any kind
to acquire the beneficial ownership of any Columbia Bancorp Common Stock, except
pursuant  to the terms of this  Plan,  the terms of the Stock  Option  Agreement
attached as Appendix IV, or in a fiduciary capacity.

          3.21.  Year 2000.  Suburban  Bancshares  has  carried  out a review to
evaluate the extent to which the business or operations  of Suburban  Bancshares
or any of the  Suburban  Subsidiaries  will be affected by the Year 2000 Problem
(as defined  below).  As a result of such  review,  Suburban  Bancshares  has no
reason to believe, and does not believe,  that the Year 2000 Problem will have a
material  adverse  effect on the  condition  (financial or  otherwise),  assets,
liabilities,  business,  or operations of Suburban  Bancshares  and the Suburban
Subsidiaries, taken as a whole. Suburban Bancshares reasonably believes that the
suppliers,  vendors, customers or other material third parties used or served by
Suburban Bancshares and the Suburban Subsidiaries are addressing or will address
the Year 2000 Problem in a timely manner.  Suburban  Bancshares is in compliance
with all applicable requirements of any Governmental Entity relating to the Year
2000  Problem and has not  received  any  correspondence  from or  provided  any
written information to any Governmental Entity relating to the Year 2000 Problem
except as  disclosed  in Schedule  3.21.  Suburban  Bancshares  has  provided in
Schedule 3.21 copies of all of its internal  plans,  including  estimates of the
anticipated associated costs, for addressing the Year 2000 Problem as it relates
to Suburban Bancshares and the Suburban Subsidiaries.  "Year 2000 Problem" means
the risk that computer hardware or software applications will not record, store,
process,  calculate and present  calendar  dates falling on and after January 1,
2000, and calculate information dependent upon or relating to such dates, in the
same manner and with the same  functionality,  data integrity and performance as
such products  record,  store,  process,  calculate and present  calendar  dates
falling on or before December 31, 1999, and calculate  information  dependent on
or relating to such dates.

     4.  Representations  and Warranties of Columbia  Bancorp.  Columbia Bancorp
represents and warrants to Suburban Bancshares as follows:

          4.1.  Organization,  Standing,  and Capitalization of Columbia Bancorp
and Columbia Subsidiaries.  (a) Columbia Bancorp is a duly organized and validly
existing  corporation  in good  standing  es.  under  the  laws of the  State of
Maryland. Columbia Bancorp has the corporate power and authority to own and hold


                                       17
<PAGE>

its  properties  and to  carry on its  business  as it is now  being  conducted.
Columbia  Bancorp is a registered  bank holding  company  under the Bank Holding
Company  Act of 1956,  as  amended.  Columbia  Bancorp  has no  subsidiaries  or
affiliated  companies  and is not a party to any joint  venture  or  partnership
other  than  as  listed  on  Schedule   4.1(a)   (collectively,   the  "Columbia
Subsidiaries").

          (b) Columbia Bank is a duly  organized and validly  existing  Maryland
commercial bank and is in good standing under the laws of the State of Maryland.
The deposits of Columbia  Bank are insured  under the  provisions of the Federal
Deposit Insurance Act, as amended.  Each of the other Columbia Subsidiaries is a
duly organized and validly  existing  corporation or other entity and is in good
standing under the laws of the jurisdiction of its incorporation or organization
as set forth on Schedule 4.1(a). Each of the Columbia Subsidiaries has the power
(corporate or other) and authority to own and hold its material  properties  and
to carry on its business as it is now being conducted. All outstanding shares of
capital stock or other equity interests of all of the Columbia  Subsidiaries are
validly issued, fully paid, and non-assessable.  Except as disclosed in Schedule
4.1(b), each of the Columbia  Subsidiaries is wholly owned by its parent.  There
are no  outstanding  options,  warrants,  rights,  or  obligations  of any  kind
entitling  the holder  thereof to acquire  shares of the capital  stock or other
equity  interests  of  any  of  the  Columbia  Subsidiaries,  and  there  are no
outstanding  securities or  instruments  of any kind that are  convertible  into
shares of the capital  stock or other  equity  interests  of any of the Columbia
Subsidiaries.  Except as  disclosed  in Schedule  4.1(b),  none of the  Columbia
Subsidiaries is a party to any joint venture or partnership.

          (c) Copies of all  organization  documents  and  by-laws  of  Columbia
Bancorp and each of the Columbia  Subsidiaries  are attached as Schedule 4.1(c),
and all such copies are true and correct as of the date hereof. The minute books
of Columbia Bancorp and each of the Columbia Subsidiaries,  which have been made
available to Suburban  Bancshares for  inspection,  are complete in all material
respects  and  accurately  record  the  actions  taken by the  stockholders  and
directors of Columbia Bancorp and each of the Columbia Subsidiaries.

          (d)  The  authorized   capital  stock  of  Columbia  Bancorp  consists
exclusively  of  9,994,000  shares of Common  Stock,  par value  $.01 per share,
4,506,035  of which shares are  outstanding  on  September  17, 1999,  and 6,000
shares of Series A Convertible  Preferred Stock, par value $.01 per share,  none
of which shares are outstanding on September 17, 1999. All outstanding shares of
Columbia   Bancorp   Common   Stock  are  validly   issued,   fully  paid,   and
non-assessable. Columbia Bancorp has reserved 300,000 shares of its Common Stock
for issuance under its Dividend Reinvestment and Stock Purchase Plan and 300,000
shares of its  Common  Stock for  issuance  under its  Stock  Option  Plans.  On
September 17, 1999, there were outstanding options to purchase 292,310 shares of
Columbia Bancorp's Common Stock at prices ranging from $4.545 to $17.00 pursuant
to these  Stock  Option  Plans.  Except for the option to be granted to Suburban
Bancshares pursuant to the Stock Option Agreement attached as Appendix IV and as
disclosed in Schedule 4.1(d), there are no other outstanding options,  warrants,
rights,  or  obligations  of any kind  entitling  the holder  thereof to acquire
shares of the Common  Stock of Columbia  Bancorp,  and there are no  outstanding
securities or  instruments of any kind that are  convertible  into shares of the


                                       18
<PAGE>

Common  Stock  of  Columbia  Bancorp.  The  Common  Stock  of  Columbia  Bancorp
deliverable  pursuant  to  this  Plan  will  be,  prior  to its  issuance,  duly
authorized for issuance and will,  when issued and delivered in accordance  with
this Plan, be duly and validly issued, fully paid, and nonassessable.

          4.2. Financial  Statements.  Columbia Bancorp has provided in Schedule
4.2 copies of the Consolidated  Financial Statements of Columbia Bancorp and the
Columbia  Subsidiaries at December 31, 1994,  1995, 1996, 1997, and 1998 and for
each of the years then ended, as reported upon by KPMG LLP, and at June 30, 1998
and 1999 and for each of the six month periods then ended, all of which are true
and complete in all material  respects,  have been prepared in  accordance  with
generally accepted accounting  principles  consistently  followed throughout the
periods covered by such consolidated financial statements and present fairly the
financial  position,   results  of  operations,   cash  flows,  and  changes  in
stockholders'  equity of Columbia  Bancorp and the Columbia  Subsidiaries at the
dates of and for the periods covered by such financial statements.

          4.3. Taxes. Schedule 4.3 sets forth the tax returns to federal, state,
county,  municipal,  or foreign  taxing  authorities  for the taxable year ended
December 31, 1994 and all taxable years through and including  December 31, 1998
for Columbia  Bancorp and the Columbia  Subsidiaries.  Columbia  Bancorp and the
Columbia  Subsidiaries  have  filed with  appropriate  federal,  state,  county,
municipal,  or foreign taxing  authorities all tax returns  required to be filed
(taking any applicable  extensions into consideration) and have paid or reserved
for all taxes shown to be due on such  returns and all  penalties  and  interest
payable in  respect  thereof.  Except as  disclosed  in  Schedule  4.3,  neither
Columbia  Bancorp nor any of the Columbia  Subsidiaries  have  received from any
taxing  authority any notice of deficiency or assessment of additional taxes not
paid or any notice of an  intention to commence an  examination  or audit of its
tax returns, and no tax audits by any taxing authority are in process. Except as
disclosed  on Schedule  4.3,  neither  Columbia  Bancorp nor any of the Columbia
Subsidiaries  have granted any waiver of any statute of limitations or otherwise
agreed to any extension of a period for the  assessment  of any federal,  state,
county, municipal, or foreign income tax. The accruals and reserves reflected in
the  consolidated  financial  statements  which Columbia Bancorp has provided to
Suburban  Bancshares as described in Section 4.2 are adequate to cover all taxes
(including interest and penalties,  if any, thereon) that are payable or accrued
as a result of the operations of Columbia Bancorp and the Columbia  Subsidiaries
for all periods prior to the date of such consolidated financial statements. For
purposes of this Section 4.3, any reference to the Columbia  Subsidiaries  shall
be deemed to include any entity listed on Schedules 4.1(a) and 4.1 (b).

          4.4 No Undisclosed Liabilities.  Except as and to the extent reflected
or reserved  against in the  consolidated  financial  statements  referred to in
Section 4.2, neither  Columbia  Bancorp nor any of the Columbia  Subsidiaries at
the dates of such consolidated financial statements had any material liabilities
or  obligations  (whether  accrued,  absolute,  or  contingent)  required  under
generally  accepted  accounting  principles to be reflected  thereon which would
materially  and  adversely  affect  the  fair  presentation  of  such  financial


                                       19
<PAGE>

statements.  Neither Columbia  Bancorp nor any of the Columbia  Subsidiaries has
incurred any liability since the date of the consolidated  financial  statements
referred to in Section  4.2  (including  any  liability  for taxes)  which would
materially and adversely affect the condition (financial or otherwise),  assets,
liabilities,  business,  or  operations  of Columbia  Bancorp  and the  Columbia
Subsidiaries,  taken  as  a  whole,  other  than  liabilities  which  have  been
reasonably incurred in the ordinary course of business.

          4.5.  Absence  of Certain  Changes  or Events.  Except as set forth in
Schedule 4.5, since December 31, 1998 there has not been:

               (a) Any materially adverse change in the financial position,
     results of operations,  assets,  liabilities,  or business of Columbia
     Bancorp  or the  Columbia  Subsidiaries,  other  than  changes  in the
     ordinary course of business;

               (b)  any  increase  in  salaries  or  wages  of   directors,
     officers,   or   employees   of  Columbia   Bancorp  or  the  Columbia
     Subsidiaries  other than in the ordinary  course of  business;  or any
     establishment  or increase  of any  employment,  compensation,  bonus,
     pension,  option,  incentive  or  deferred  compensation,   retirement
     payments, profit sharing, or similar agreement or benefit, authorized,
     granted,  or accrued  to any  directors,  officers,  or  employees  of
     Columbia  Bancorp  or the  Columbia  Subsidiaries  other  than  in the
     ordinary course of business; or

               (c) except with respect to the three cash dividend  payments
     aggregating  $.24 per share paid to date and the cash dividend payment
     of $.08 per share of Common Stock  declared on September  27, 1999, to
     be paid on October 29, 1999, any declaration, payment, or set aside by
     Columbia  Bancorp of any  dividend or  distribution  in respect of its
     Common Stock, or any purchase,  issuance, or sale of any of its Common
     Stock.

          4.6. Complete and Accurate  Disclosure.  Neither this Plan (insofar as
it relates to Columbia Bancorp and the Columbia  Subsidiaries,  the Common Stock
of Columbia Bancorp, and the involvement of Columbia Bancorp in the transactions
contemplated  hereby) nor any financial  statement,  schedule,  certificate,  or
other  statement  or  document  set forth on a schedule  delivered  by  Columbia
Bancorp to Suburban  Bancshares in connection with this Plan, when considered in
the  aggregate,  contains any statement  which,  at the time and in light of the
circumstances under which it is made, is false or misleading with respect to any
material  fact or  omits  to  state  any  material  fact  necessary  to make the
statements contained herein or therein not false or misleading.

          4.7.  Title  to  Properties;   Absence  of  Liens  and   Encumbrances;
Compliance with Laws.  Except as disclosed on Schedule 4.7, Columbia Bancorp and
each of the Columbia  Subsidiaries has good and marketable title to all of their
respective properties and assets,  including those reflected in the consolidated
financial  statements  referred to in Section  4.2,  except as sold or otherwise
disposed of for fair value and only in the ordinary course of business, free and


                                       20
<PAGE>

clear of all liens and  encumbrances,  except (i) with respect to property as to
which they are  lessees,  (ii) with  respect to real  estate  owned by  Columbia
Bancorp  or  the  Columbia  Subsidiaries,   for  use,  occupancy,   and  similar
restrictions  of public  record  that may be observed  by an  inspection  of the
property,  and such other utility and other easements and encumbrances as do not
materially  adversely  affect the fair market value of such real  property,  and
(iii) liens to secure borrowings,  liens to secure  governmental  deposits,  and
liens for current taxes not yet due and payable.  Neither  Columbia  Bancorp nor
any of the  Columbia  Subsidiaries  owns  or  leases  real  property  except  as
disclosed  on Schedule  4.7, and is not in default  under any material  lease of
real or personal property to which it is a party. As of the date hereof,  except
as  disclosed  on Schedule  4.7,  the real  properties,  structures,  buildings,
equipment,  and the tangible  personal  property owned,  operated,  or leased by
Columbia  Bancorp or any of the  Columbia  Subsidiaries  are (x) in good repair,
order, and condition, except for depletion,  depreciation, and ordinary wear and
tear, (y) suitable for the uses for which they were intended,  and (z) free from
any  known  structural  defects.  As of the  date  hereof,  there  are no  laws,
conditions of record, or other  impediments which materially  interfere with the
intended  uses by Columbia  Bancorp or any of the Columbia  Subsidiaries  of the
real property or tangible personal property owned or leased by it, except as set
forth  in  Schedule  4.7.  Neither  Columbia  Bancorp  nor  any of the  Columbia
Subsidiaries  have received any notice of any violation of any  applicable  law,
building code, zoning ordinance,  or other similar law. Columbia Bancorp and the
Columbia  Subsidiaries  own or have the  rights  to use all  real  and  personal
properties  and assets that are  material to the conduct of the  business as now
conducted of Columbia Bancorp and the Columbia Subsidiaries, taken as a whole.

          4.8.  Contracts.  Except for the plans,  contracts,  and agreements of
Columbia  Bancorp and the Columbia  Subsidiaries  (or of any plan under  Section
4.8(b))  disclosed  on Schedule  4.8,  neither  Columbia  Bancorp nor any of the
Columbia  Subsidiaries  (nor any plan  under  Section  4.8(b))  is a party to or
subject to:

               (a) Any employment,  consultation,  or compensation contract
     or arrangement (other than those terminable at will) with any officer,
     consultant, director, or employee;

               (b) any plan, contract, program, understanding, or agreement
     providing   for   bonuses,   pensions,    severance   pay,   executive
     compensation,   options,  stock  purchases,   or  any  other  form  of
     retirement,  incentive or deferred compensation,  retirement payments,
     death benefits,  profit  sharing,  branch closing  benefits,  workers'
     compensation,  tuition reimbursement or scholarship program, any plans
     providing  benefits  or  payments in the event of a change in control,
     change in ownership,  or sale of a substantial  portion (including all
     or substantially  all) of the assets of Columbia Bancorp or any of the
     Columbia  Subsidiaries,  or any  health,  accident,  disability,  sick
     leave, vacation pay, life insurance,  or other welfare benefit, or any
     other  employee  or  retired  employee  benefit  (including,   without
     limitation,  any "employee benefit plan" as defined in Section 3(3) of
     ERISA) in which any current or former employee, director, or agent (or


                                       21
<PAGE>

     beneficiary of any of them) of Columbia Bancorp or any of the Columbia
     Subsidiaries  is or was,  within  the  last  six  years,  entitled  to
     participate;

               (c) any contract or agreement with any labor union;

               (d) any  lease  of real or  personal  property  with  annual
     rentals in excess of $5,000;

               (e) any agreement for services in excess of $10,000 per year
     or for the purchase or disposition of any equipment or supplies except
     individual  purchase  orders  for  office  supplies  incurred  in  the
     ordinary course of business of $10,000 or less;

               (f) any  instrument  evidencing or relating to  indebtedness
     for   borrowed   money  except  for   customer   accounts,   deposits,
     certificates of deposit,  federal funds purchased,  and the like which
     may be construed as  borrowings  and except for loans made by Columbia
     Bank as lender in the ordinary course of its business;

               (g) any lease or other contract containing  covenants not to
     enter into or consummate the transactions contemplated hereby or which
     provides  for payments in excess of $2,000 and will be  terminated  or
     violated by the Mergers or in respect of which the Mergers would cause
     a default or acceleration of obligations; or

               (h) any other  contract or agreement not of the type covered
     by any of the other  specific  terms of this  Section  4.8  obligating
     Columbia Bancorp or any Columbia  Subsidiary to expenditures in excess
     of $25,000.

Each of the instruments disclosed on Schedule 4.8 is valid and in full force and
effect.  Neither  Columbia  Bancorp nor any of the Columbia  Subsidiaries are in
default nor have any of them  received any notice that they are in default,  nor
to their  actual  knowledge  is any other party in default,  under any  material
agreements,  instruments, or obligations to which Columbia Bancorp or any of the
Columbia Subsidiaries is a party or by which they are bound.

          4.9. Litigation.  Except as disclosed on Schedule 4.9, (a) there is no
litigation,  proceeding,  or  investigation  pending  or,  to the  knowledge  of
Columbia  Bancorp,  threatened  against  Columbia Bancorp or any of the Columbia
Subsidiaries  which  would  result  in  any  materially  adverse  change  in the
condition (financial or otherwise),  assets, liabilities,  business, operations,
or future prospects of Columbia Bancorp and the Columbia Subsidiaries,  taken as
a whole; (b) there are no outstanding  orders,  writs,  injunctions,  judgments,
decrees, directives, consent agreements, or memoranda of understanding issued by
any federal,  state,  or local court or  governmental  authority or  arbitration


                                       22
<PAGE>

tribunal  issued  against or with the consent of Columbia  Bancorp or any of the
Columbia  Subsidiaries  that  materially  and  adversely  affect  the  condition
(financial or otherwise),  assets, liabilities,  business, operations, or future
prospects or that in any manner  restrict  Columbia  Bancorp's right to carry on
its  business or that of the Columbia  Subsidiaries  as now  conducted;  and (c)
Columbia  Bancorp is aware of no fact or condition  now existing that might give
rise to any  litigation,  investigation,  or  proceeding  which,  if  determined
adversely  to  Columbia  Bancorp  or  any of the  Columbia  Subsidiaries,  would
materially and adversely affect the condition (financial or otherwise),  assets,
liabilities,  business,  operations, or future prospects of Columbia Bancorp and
the Columbia  Subsidiaries,  taken as a whole,  or would  restrict in any manner
Columbia  Bancorp's  right  to  carry on its  business  or that of the  Columbia
Subsidiaries  as now conducted.  Columbia  Bancorp has disclosed on Schedule 4.9
all litigation in which Columbia Bancorp or any of the Columbia  Subsidiaries is
involved as a party (other than bankruptcy proceedings in which Columbia Bancorp
or any of the  Columbia  Subsidiaries  has  filed  proofs  of claim  or  routine
collection and foreclosure suits initiated in the ordinary course of business).

          4.10.  Environmental Matters. (a) Except as disclosed on Schedule 4.10
or as would not  individually  or in the  aggregate  have a  materially  adverse
effect on the condition (financial or otherwise), assets, liabilities, business,
or  operations  of Columbia  Bancorp and the Columbia  Subsidiaries,  taken as a
whole:

               (i)  neither  Columbia  Bancorp  nor  any  of  the  Columbia
     Subsidiaries  has received any written  notices,  demand  letters,  or
     written requests for information  from any Governmental  Entity or any
     third  party   indicating  that  Columbia   Bancorp  or  any  Columbia
     Subsidiary may be in violation of, or liable under, any  Environmental
     Law;

               (ii)  there  are  no  civil,   criminal,  or  administrative
     actions,  suits,  demands,   claims,  hearings,   investigations,   or
     proceedings pending or to the knowledge of Columbia Bancorp threatened
     against Columbia Bancorp or any Columbia Subsidiary alleging that they
     may be in violation of, or liable under, any Environmental Law;

               (iii) no  reports  have  been  filed  with any  Governmental
     Entity,  nor to the  knowledge  of  Columbia  Bancorp  are any reports
     required to be filed with any Governmental Entity, by Columbia Bancorp
     or any of the  Columbia  Subsidiaries  concerning  the  release of any
     Hazardous Substance or the violation of any Environmental Law on or at
     any of the  Properties  of  Columbia  Bancorp  or any of the  Columbia
     Subsidiaries;

               (iv) to the  knowledge  of  Columbia  Bancorp  or  except as
     disclosed on Schedule 4.10, there are no underground storage tanks on,
     in, or under any of the  Properties of Columbia  Bancorp or any of the
     Columbia  Subsidiaries,  and no  underground  storage  tanks have been
     closed or removed from any Property of Columbia  Bancorp or any of the
     Columbia  Subsidiaries  while such  Property  was owned or operated by
     Columbia Bancorp or any of the Columbia Subsidiaries;



                                       23
<PAGE>

               (v) to the  knowledge  of  Columbia  Bancorp  or  except  as
     disclosed on Schedule 4.10, no Hazardous Substance has been generated,
     used, stored, processed,  disposed of, or discharged on or into any of
     the   Properties   of  Columbia   Bancorp  or  any  of  the   Columbia
     Subsidiaries,  except for such hazardous  substances as may be used in
     the everyday business of a bank office; and

               (vi) to the  knowledge  of  Columbia  Bancorp  or  except as
     disclosed on Schedule 4.10, no materials containing asbestos have been
     used or incorporated in any building or other structure or improvement
     located on any of the  Properties  of  Columbia  Bancorp or any of the
     Columbia Subsidiaries.

          (b) There are no  permits  or  licenses  or agency  filings or reports
required under any  Environmental Law in respect of any of the Properties now or
formerly  owned  or  operated  by  Columbia  Bancorp  or  any  of  the  Columbia
Subsidiaries that the absence of which could,  individually or in the aggregate,
have a materially  adverse  effect on the condition  (financial  or  otherwise),
assets,  liabilities,  business,  or  operations  of  Columbia  Bancorp  and the
Columbia Subsidiaries, taken as a whole.

          (c)  Columbia  Bancorp has  disclosed  on Schedule  4.10 a copy of its
current policy regarding compliance with Environmental Laws.

          4.11. Labor Matters. To Columbia Bancorp's knowledge,  no organization
effort with respect to any of the  employees  of Columbia  Bancorp or any of the
Columbia  Subsidiaries is pending or threatened,  and no labor dispute,  strike,
work stoppage,  employee action,  or labor relation problem which may materially
affect Columbia Bancorp or any of the Columbia Subsidiaries currently is pending
or threatened.  Columbia Bancorp and each of the Columbia  Subsidiaries  have at
all  times  in all  material  respects  complied  with all  applicable  employee
termination  notice and similar laws.  Columbia Bancorp and each of the Columbia
Subsidiaries  have at all  times  complied  in all  material  respects  with all
applicable  family  medical  leave and similar  laws.  If  applicable,  Columbia
Bancorp and each of the Columbia  Subsidiaries have at all times complied in all
material respects with all applicable  requirements of the Worker Adjustment and
Retraining Notification Act and all similar state laws.

          4.12.  Pension  and  Welfare  Matters.  With  respect  to  the  plans,
contracts,  programs,  understandings,  or  agreements  identified  pursuant  to
Sections 4.8(a) and (b) (for purposes of this Section 4.12, the "plans"):

               (a) Schedule 4.12 clearly  identifies all of the plans which
     are (i) Multiemployer Plans, (ii) Multiple Employer Plans, (iii) plans
     other than  Multiemployer  Plans and Multiple  Employer Plans that are
     subject to Section  412 of the Code,  (iv) plans  intended  to qualify
     under Section 401 of the Code, and (v) "welfare  benefit plans" within
     the  meaning of Section  3(1) of ERISA which  provide  for  continuing
     benefits or  coverage  for any  participant  or any  beneficiary  of a


                                       24
<PAGE>

     participant after such participant's  termination of employment except
     coverage  or benefits  required  by Section  4980B of the Code if paid
     100% by the participant;

               (b) true,  correct  and  complete  copies  of the  following
     documents,  with respect to each of the plans have been made available
     or delivered to Suburban Bancshares: (i) all plan documents, including
     trust  agreements,  insurance  policies,  loan documents,  and service
     agreements and amendments thereto, (ii) the most recent Forms 5500 and
     any  financial  statements  attached  thereto  and those for the prior
     three years,  (iii) the last Internal  Revenue  Service  determination
     letter and the  application  with respect  thereto,  (iv) summary plan
     descriptions,  (v) the most recent actuarial  statements and those for
     the prior three years,  (vi) written  descriptions  of all non-written
     agreements  relating to any such plan,  as  applicable,  for  Columbia
     Bancorp and each of the Columbia  Subsidiaries,  and (vii) all filings
     with a  governmental  agency or entity  within the last  three  years,
     including,  without  limitation,  filings under the voluntary or other
     compliance  programs of the U.S.  Department  of Labor or the Internal
     Revenue Service;

               (c) each of the  plans  has been  operated  in all  material
     respects  in  accordance  with its  terms and in  accordance  with all
     applicable  laws including,  but not limited to, the ERISA,  the Code,
     the Consolidated Omnibus Budget Reconciliation Act of 1985, the Health
     Insurance Portability and Accountability Act of 1996, and state health
     care continuation laws;

               (d) all  reporting  and  disclosure  requirements  of  ERISA
     imposed  upon each such plan have been  complied  with in all material
     respects,  and all required  governmental  filings have been made with
     respect to the plans;

               (e) none of (i) the plans,  (ii) the Columbia  Subsidiaries,
     and (iii) Columbia Bancorp, and to Columbia Bancorp's  knowledge,  (x)
     no  current  or  former  director,   officer,   employee,   agent,  or
     representative   of   Columbia   Bancorp   or  any  of  the   Columbia
     Subsidiaries, and (y) no fiduciary, "party in interest" (as defined in
     Section  3(14) of ERISA)  or  "disqualified  person"  (as  defined  in
     Section 4975 of the Code) with respect to any of the plans has engaged
     in any non-exempt  "prohibited  transaction" in connection with any of
     the plans  within the meaning of Section  4975 of the Code or Title I,
     Part 4 of ERISA;

               (f) none of the plans has any accumulated funding deficiency
     (as  defined in  Section  302 of ERISA and  Section  412 of the Code),
     whether or not waived, with respect to the latest five plan years, nor
     any liability to the PBGC (other than normal premium payments);

               (g) with  respect  to plans  which  are  pension  plans  (as
     defined in Section  3(2) of ERISA)  subject to Title IV of ERISA,  the
     assets of each such funded plans equal or exceed the  liabilities  (as


                                       25
<PAGE>

     defined in Section  4001(a)(16)  of ERISA)  under such plans when such
     liabilities are valued on a termination  basis using PBGC interest and
     other assumptions;

               (h) no  contributions  to any of  the  plans  from  Columbia
     Bancorp or any of the Columbia  Subsidiaries  are  currently  past due
     and, if applicable,  all past service and other liabilities  currently
     existing  but  payable in the future,  if any,  are  reflected  in the
     latest actuarial report in accordance with sound actuarial principles;

               (i) no  audits,  proceedings,  investigations,  filings,  or
     other matters (excluding any determination letter application that has
     been or may be filed prior to the Effective  Date) are pending  before
     the IRS,  the  Department  of  Labor,  the  PBGC,  or other  public or
     quasi-public body in connection with any such plans;

               (j) each plan intended to qualify  under  Section  401(a) of
     the Code is so qualified and the trust maintained  pursuant thereto is
     exempt  from  taxation  under  Section 501 of the Code and nothing has
     occurred with respect to the operation or  administration of such plan
     which would cause the loss of such  qualification  or exemption or the
     imposition of any liability,  penalty,  or tax under ERISA or the Code
     that could reasonably be expected to have a material adverse effect on
     the condition (financial or otherwise), assets, liabilities, business,
     or operations of Columbia Bancorp and the Columbia Subsidiaries, taken
     as a whole, or on such plan;

               (k)  except as  disclosed  in  Schedule  4.12,  through  the
     Effective Date, there will be no changes in the operation of the plans
     or in the  documents  constituting  or affecting  the plans except for
     amendments and operational changes required by applicable law which do
     not materially increase the cost of such plans;

               (l) no employees,  former employees, or retired employees of
     Columbia Bancorp or any of the Columbia  Subsidiaries,  as a result of
     their  employment  with  Columbia  Bancorp  or  any  of  the  Columbia
     Subsidiaries,  are participants in any Multiemployer  Plan and neither
     Columbia Bancorp nor any of the Columbia Subsidiaries has any current,
     contingent, or potential liability with respect to any such plan;

               (m) no  "reportable  event,"  as  such  term is  defined  in
     Section 4043(c) of ERISA,  has occurred with respect to any plan since
     the effective date of ERISA,  other than a reportable  event for which
     the 30 days notice  requirement under regulations of the PBGC has been
     waived;



                                       26
<PAGE>

               (n) there are no pending or threatened claims by or disputes
     with any  participants  or  beneficiaries  of the plans,  except  plan
     benefit  claims  arising in the normal course of the operations of the
     plans (other than terminated plans) and as to which no dispute exists;

               (o)  Columbia  Bancorp has no  knowledge  of any facts which
     could give rise to any claims against any plan or any fiduciary of any
     plan,  except for plan benefit  claims arising in the normal course of
     the operations of the plans (other than terminated plans);

               (p)  neither  Columbia  Bancorp  nor  any  of  the  Columbia
     Subsidiaries  nor any  fiduciary  of any plan has given  notice to any
     fiduciary  liability  insurer  of any  claims or  potential  claims in
     connection with any of the plans;

               (q) except as disclosed in Schedule 4.12,  each of the plans
     which  benefit  retired  employees  of Columbia  Bancorp or any of the
     Columbia Subsidiaries may effectively be terminated or amended, in any
     manner and at any time, without further liability to its participants,
     by its sponsoring employer;

               (r)  neither  Columbia  Bancorp  nor  any  of  the  Columbia
     Subsidiaries has provided, nor is required to provide, security to any
     pension  plan  or to any  single-employer  plan  pursuant  to  Section
     401(a)(29) of the Code or Section 307 of ERISA;

               (s)  there  has  been no  announcement  or  legally  binding
     commitment by Columbia Bancorp or any of the Columbia  Subsidiaries to
     create an additional  plan,  or to amend a plan except for  amendments
     required by applicable law which do not  materially  increase the cost
     of such plan;

               (t) as to any terminated  plans,  all  obligations  for plan
     benefits or other liabilities have been satisfied in full;

               (u) none of the plans  contains  any  provision  which would
     prohibit the transactions  contemplated by this Plan or which,  except
     as  disclosed  in  Schedule  4.12,  would give rise to any  severance,
     termination,  or other payments or liabilities,  or any forgiveness of
     indebtedness,   vesting,   distribution,   increase  in  benefits,  or
     obligations  to  fund  benefits  as  a  result  of  the   transactions
     contemplated  by this Plan;  no payment that is owed or may become due
     any director,  officer,  employee, or agent of Columbia Bancorp or any
     of the  Columbia  Subsidiaries  in  connection  with a  plan  will  be
     non-deductible  to the payor under Section 280G of the Code,  and none
     of  the  Suburban  Subsidiaries,   Columbia   Subsidiaries,   Suburban


                                       27
<PAGE>

     Bancshares,  and  Columbia  Bancorp  will be required to "gross up" or
     otherwise  compensate any person in connection  with a plan because of
     the imposition of any excise tax under Section 4999 of the Code; and

               (v) no plan is funded by,  associated  with, or related to a
     "voluntary employees'  beneficiary  association" within the meaning of
     Section 501(c)(9) of the Code.

          4.13.  Related  Party  Transactions.  Except as  disclosed on Schedule
4.13,  neither  Columbia  Bancorp nor any of the Columbia  Subsidiaries  has any
contract,  extension of credit,  business arrangement,  or other relationship of
any  kind  with any of the  following  persons:  (a) any  executive  officer  or
director  of  Columbia  Bancorp  or any of the  Columbia  Subsidiaries;  (b) any
stockholder  owning  five  percent or more of the  outstanding  Common  Stock of
Columbia Bancorp; or (c) any "affiliate" (as defined in the SEC Rule 405) of the
foregoing  persons or any business in which any of the  foregoing  persons is an
officer, director, employee, or five percent or greater equity owner.

          4.14.  No  Conflict  with  Other  Documents.  Except as  disclosed  on
Schedule 4.14,  neither the execution and delivery of this Plan nor the carrying
out of the  transactions  contemplated  hereunder  will result in any violation,
termination,  or  modification  of,  or be in  conflict  with,  any terms of any
contract or other  instrument to which  Columbia  Bancorp or any of the Columbia
Subsidiaries  is a party,  or of any judgment,  decree,  or order  applicable to
Columbia Bancorp or any of the Columbia Subsidiaries,  or result in the creation
of any lien,  charge,  or  encumbrance  upon any of their  properties or assets,
except for any of the foregoing  which would not have a material  adverse effect
upon the condition (financial or otherwise),  assets, liabilities,  business, or
operations of Columbia Bancorp and the Columbia Subsidiaries, taken as a whole.

          4.15. Compliance with Laws;  Governmental  Authorizations.  (a) Except
where  noncompliance  would not have a  material  and  adverse  effect  upon the
condition (financial or otherwise), assets, liabilities, business, or operations
of  Columbia  Bancorp  and the  Columbia  Subsidiaries,  taken as a  whole,  (i)
Columbia  Bancorp and each of the Columbia  Subsidiaries  are in compliance with
all statutes, laws, ordinances, rules, regulations,  judgments, orders, decrees,
directives,   consent   agreements,   memoranda   of   understanding,   permits,
concessions, grants franchises,  licenses, and other governmental authorizations
or approvals applicable to Columbia Bancorp, the Columbia  Subsidiaries,  or any
of their  properties;  and (ii) all permits,  concessions,  grants,  franchises,
licenses, and other governmental  authorizations and approvals necessary for the
conduct of the business of Columbia Bancorp and the Columbia Subsidiaries as now
conducted  have been duly  obtained and are in full force and effect,  and there
are no proceedings pending or, to Columbia Bancorp's knowledge, threatened which
may result in the revocation,  cancellation,  suspension,  or materially adverse
modification of any thereof.

          (b)  Columbia  Bancorp has filed all reports  that it was  required to
file with the SEC under the Exchange Act, all of which  complied in all material
respects with all applicable  requirements of the Exchange Act and the rules and


                                       28
<PAGE>

regulations adopted thereunder.  As of their respective dates, each such report,
statement, form, or other document,  including without limitation, any financial
statements or schedules  included therein,  did not contain any untrue statement
of a  material  fact or omit to state a  material  fact  required  to be  stated
therein  or  necessary  to  make  the  statements   therein,  in  light  of  the
circumstances  under  which  they were  made,  not  misleading;  provided,  that
information  as of a later date shall be deemed to modify  information  as of an
earlier date.

          4.16.  Authority;   Enforceability.   The  execution,   delivery,  and
performance  of this  Plan  by  Columbia  Bancorp  has  been  duly  and  validly
authorized by its Board of Directors,  subject only to requisite approval by the
stockholders  of  Columbia  Bancorp  and  appropriate   governmental  regulatory
authorities.  This Plan is a valid and binding  agreement  of Columbia  Bancorp,
enforceable  against it in accordance with its terms,  subject as to enforcement
to bankruptcy, insolvency, fraudulent transfer, reorganization,  moratorium, and
similar laws of general applicability relating to or affecting creditors' rights
and to general equity principles.

          4.17.  Insurance.  All insurance policies held by Columbia Bancorp and
the  Columbia  Subsidiaries  relating  to their  operations  (except  for  title
insurance  policies),  including without  limitation all financial  institutions
bonds,  are set forth on Schedule  4.17. All such policies are in full force and
effect.  Neither  Columbia  Bancorp  nor any of the  Columbia  Subsidiaries  has
received any notice of cancellation with respect to any such policies and has no
reason to expect that it will receive a notice of  cancellation  from any of its
present insurance carriers;  provided,  however,  that Columbia Bancorp makes no
representation  as to the  effect of this  Plan or the  Mergers  on its  present
financial institutions bond or bonds.

          4.18.  Financial  Institution  Bond.  Since January 1, 1993,  Columbia
Bancorp and the Columbia Subsidiaries have continuously maintained in full force
and effect one or more financial  institutions  bonds insuring  Columbia Bancorp
and the  Columbia  Subsidiaries  against  acts of  dishonesty  by each of  their
employees.  No claim has been made  under any such bond  since  such  date,  and
Columbia  Bancorp is not aware of any fact or condition now existing which forms
the basis of a claim  under any such bond.  Columbia  Bancorp  and the  Columbia
Subsidiaries have no reason to expect that their present financial  institutions
bond or bonds  will not be renewed by their  carrier on  substantially  the same
terms as those now in effect; provided,  however, that Columbia Bancorp makes no
representation  as to the  effect of this  Plan or the  Mergers  on its  present
financial institutions bond or bonds.

          4.19. Brokers;  Financial Advisor.  All negotiations  relating to this
Plan  and the  transactions  contemplated  hereunder  have  been  carried  on by
Columbia Bancorp directly or through its counsel or financial  advisor and there
has been no  intervention  of any person as the result of any action of Columbia
Bancorp (and, so far as known to Columbia Bancorp,  no intervention of any other
person) in such  manner as to give rise to any valid  claim  against  any of the
parties hereto for a brokerage  commission,  finder's fee, or other like payment
(other than to its financial advisor, Austin Financial Services, Inc.). Schedule


                                       29
<PAGE>

4.19 is a copy of the agreement with Austin Financial Services,  Inc., which has
been  engaged by  Columbia  Bancorp as its  financial  advisor and to deliver an
opinion as to the  fairness  of the  transactions  contemplated  by this Plan to
Columbia Bancorp.

          4.20.  Beneficial Ownership of Suburban Bancshares Common Stock. As of
the date  hereof,  Columbia  Bancorp  does not  beneficially  own any  shares of
Suburban  Bancshares Common Stock or have any option,  warrant,  or right of any
kind to acquire the  beneficial  ownership  of any  Suburban  Bancshares  Common
Stock,  except pursuant to the terms of this Plan, the terms of the Stock Option
Agreement attached as Appendix III, or in a fiduciary capacity.

          4.21. Year 2000. Columbia Bancorp has carried out a review to evaluate
the extent to which the business or operations of Columbia Bancorp or any of the
Columbia  Subsidiaries will be affected by the Year 2000 Problem. As a result of
such review,  Columbia  Bancorp has no reason to believe,  and does not believe,
that the Year 2000 Problem will have a material  adverse effect on the condition
(financial  or  otherwise),  assets,  liabilities,  business,  or  operations of
Columbia  Bancorp  and the  Columbia  Subsidiaries,  taken as a whole.  Columbia
Bancorp  reasonably  believes that the  suppliers,  vendors,  customers or other
material  third  parties  used or served by Columbia  Bancorp  and the  Columbia
Subsidiaries  are  addressing  or will address the Year 2000 Problem in a timely
manner.  Columbia  Bancorp is in compliance with all applicable  requirements of
any  Governmental  Entity relating to the Year 2000 Problem and has not received
any correspondence  from or provided any written information to any Governmental
Entity  relating to the Year 2000 Problem  except as disclosed in Schedule 4.21.
Columbia  Bancorp has  provided in Schedule  4.21 copies of all of its  internal
plans,  including estimates of the anticipated  associated costs, for addressing
the Year 2000  Problem  as it  relates  to  Columbia  Bancorp  and the  Columbia
Subsidiaries.

     5. Covenants of Suburban  Bancshares.  Except as otherwise  consented to in
writing by Columbia  Bancorp  after the date of this Plan,  Suburban  Bancshares
covenants to and agrees with Columbia Bancorp as follows:

          5.1.  Information.  (a) Suburban  Bancshares  shall,  upon  reasonable
notice,  give to Columbia  Bancorp and to its  officers,  accountants,  counsel,
financial advisors, and other representatives, reasonable access during Suburban
Bancshares' and the Suburban  Subsidiaries' normal business hours throughout the
period prior to the Effective Date to all of their properties, books, contracts,
commitments,  reports of examination (consistent with applicable law), depositor
and  stockholder  lists,  and  records.  Suburban  Bancshares  and the  Suburban
Subsidiaries  will, at their own expense,  furnish  Columbia Bancorp during such
period with all such  information  concerning  their affairs as Columbia Bancorp
may  reasonably  request,  including  information  for use in determining if the
conditions of Section 7.1 through Section 7.10 have been satisfied, necessary to
prepare the regulatory  filings or  applications  to be filed with  governmental
regulatory authorities to obtain the approvals referred to in Section 2, and for
use in any other  necessary  filings  to be made with  appropriate  governmental
regulatory authorities.



                                       30
<PAGE>

          (b) Suburban Bancshares  acknowledges that information  received by it
concerning  Columbia Bancorp and the Columbia  Subsidiaries and their operations
is subject to the  Confidentiality  Agreement  dated  September 16, 1999 between
Columbia  Bancorp and Suburban  Bancshares  (the  "Confidentiality  Agreement").
Without limiting the foregoing, Suburban Bancshares will not, and will cause its
representatives not to, use any information obtained pursuant to Section 6.1 for
any purpose  unrelated to the consummation of the  transactions  contemplated by
this Plan.  Subject to the  requirements of law,  Suburban  Bancshares will keep
confidential,  and will  cause its  representatives  to keep  confidential,  all
information  and  documents   obtained  pursuant  to  Section  6.1  unless  such
information (i) was already known to Suburban Bancshares, (ii) becomes available
to Suburban Bancshares from other sources not known by Suburban Bancshares to be
bound by a  confidentiality  obligation,  (iii) is disclosed  with prior written
approval  of  Columbia  Bancorp  and the  Columbia  Subsidiaries,  or (iv) is or
becomes readily  ascertainable from published  information or trade sources.  In
the event that this Plan is terminated or the transactions  contemplated by this
Plan shall otherwise fail to be consummated,  Suburban Bancshares shall promptly
cause all copies of documents or extracts  thereof  containing  information  and
data as to Columbia Bancorp and the Columbia Subsidiaries to be returned. In the
event that this Plan has been terminated or the transactions contemplated hereby
shall have failed to be consummated and Suburban Bancshares or any of its agents
or   representatives   are   requested   or   required   (by   oral   questions,
interrogatories,  requests for information,  or documents in legal  proceedings,
subpoena,  civil investigative demand, or other similar process) to disclose any
of the  materials  delivered  or obtained  pursuant  to the Plan (the  "Columbia
Documentation"),  Suburban Bancshares shall provide Columbia Bancorp with prompt
written notice of any such request or  requirement so that Columbia  Bancorp may
seek a protective  order or other  appropriate  remedy.  If, in the absence of a
protective  order or other remedy,  Suburban  Bancshares or any of its agents or
representatives are compelled to disclose any of such Columbia  Documentation to
any  tribunal  or else stand  liable for  contempt  or suffer  other  censure or
penalty,  Suburban  Bancshares  or its agents or  representatives  may,  without
liability hereunder, disclose to such tribunal only that portion of the Columbia
Documentation which Suburban  Bancshares' counsel advises Suburban Bancshares is
legally  required to be  disclosed,  provided,  that Suburban  Bancshares  shall
exercise  its best  efforts to  preserve  the  confidentiality  of the  Columbia
Documentation,  including,  without  limitation,  by  cooperating  with Columbia
Bancorp to obtain an appropriate  protective  order or other reliable  assurance
that confidential  treatment will be accorded the Columbia Documentation by such
tribunal.

          5.2.  Events  Preceding  Effectiveness.  Suburban  Bancshares  and the
Suburban  Subsidiaries will use commercially  reasonable  efforts to assure that
each of the events specified in Section 2 which require action on its part shall
occur on or before the Effective Date.

          5.3.  Regulatory  Approvals.  Suburban  Bancshares  and  the  Suburban
Subsidiaries will, where necessary, cooperate with Columbia Bancorp's efforts to
obtain all necessary  regulatory  approvals of the transactions  contemplated by
this Plan.

          5.4. Conduct of Business.  After the date of this Plan and pending the
Effective  Date,  (a) Suburban  Bancshares  and the Suburban  Subsidiaries  will


                                       31
<PAGE>

conduct their business only in the ordinary course; (b) Suburban  Bancshares and
the  Suburban  Subsidiaries  shall not effect any change or  amendment  in their
respective  charters or by-laws;  (c) except with respect to Suburban Bancshares
stock  options  outstanding  on the date of this Plan  which  are or may  become
subject to exercise, Suburban Bancshares and the Suburban Subsidiaries shall not
change their  authorized,  issued,  or outstanding  capital stock;  (d) Suburban
Bancshares  shall not declare cash dividends in respect of its Common Stock; (e)
except as disclosed in Schedule  5.4(e),  Suburban  Bancshares  and the Suburban
Subsidiaries shall not increase employee  compensation or benefit levels (except
for annual  increases not in excess of amounts  established  by its regular past
practices),  shall  not  establish  or  make  any  increase  in any  employment,
compensation,  bonus,  pension,  option,  incentive  or  deferred  compensation,
retirement,  death,  profit sharing, or similar agreements or benefits of any of
its past,  present,  or future  officers  or  employees,  other than  additional
premiums to obtain an extension of directors' and officers'  liability  coverage
for six years (which Suburban Bancshares is authorized to obtain), and except as
provided in this Agreement,  shall not modify the existing employment agreements
with any  officers  or  employees;  (f)  Suburban  Bancshares  and the  Suburban
Subsidiaries  shall not make any change in any of their  accounting  policies or
practices unless required by generally  accepted  accounting  principles or take
any  action  which  would  cause  the  Mergers  not  to be  accounted  for  as a
pooling-of-interests  (and will  provide and cause  Stegman & Company to provide
the letters  contemplated  by Section  7.10);  (g) Suburban  Bancshares  and the
Suburban Subsidiaries shall not incur any liability for borrowed money except in
the ordinary  course of their banking  business  (i.e.,  may only incur variable
rate  loans with  terms not  greater  than one year) or place upon or permit any
lien or encumbrance  upon any of their  properties or assets except liens of the
type  permitted in the  exceptions to Section 3.7; and (h)  notwithstanding  the
foregoing,  upon Columbia Bancorp's request, Suburban Bancshares shall terminate
the Suburban Bancshares,  Inc. 401(k) Plan, effective as of the date immediately
preceding the Effective Date.  Pending the Effective Date,  Suburban  Bancshares
and the Suburban  Subsidiaries shall (x) use commercially  reasonable efforts to
preserve  their  business  organization  and  assets and to keep  available  the
services of their full-time  officers and employees,  (y) continue in effect the
present  method of  conducting  their  business,  and (z) consult with  Columbia
Bancorp as to making decisions or actions in matters (i) other than those in the
ordinary course of business, or (ii) except as disclosed in Schedule 5.4(z)(ii),
involving any capital expenditures in excess of $25,000.

          5.5. Reservation of Shares.  Suburban Bancshares shall have reserved a
sufficient  number of shares of its Common Stock for issuance  upon  exercise of
the option granted pursuant to the Stock Option  Agreement  attached as Appendix
III, which is to be executed by Columbia  Bancorp and Suburban  Bancshares,  and
shall  have  taken  all other  actions  necessary  to  fulfill  its  obligations
thereunder.

          5.6.  Meeting  of  Stockholders  of  Suburban   Bancshares;   Document
Preparation. (a) Suburban Bancshares will duly call and convene a meeting of its
stockholders  to act  upon  the  transactions  contemplated  hereby  as  soon as
practicable.  Except to the extent  legally  required  for the  discharge by the
board of directors of its fiduciary duties,  Suburban  Bancshares will recommend


                                       32
<PAGE>

approval of this Plan and the Holding  Company Merger to its  stockholders,  and
will use commercially reasonable efforts to obtain a favorable vote thereon. The
calling and holding of such  meeting and all notices,  transactions,  documents,
and  information  related  thereto  will  be in  material  compliance  with  all
applicable laws.

          (b)  Suburban  Bancshares  shall  furnish  Columbia  Bancorp with such
information  concerning Suburban Bancshares and the Suburban  Subsidiaries as is
necessary  in order to cause  the  Proxy  Statement/Prospectus  (as  defined  in
Section 6.6), insofar as it relates to such corporations, to comply with Section
6.6.  Suburban  Bancshares  agrees promptly to advise Columbia Bancorp if at any
time prior to the Suburban  Bancshares  stockholders'  meeting,  any information
provided  by  Suburban  Bancshares  in the  Proxy  Statement/Prospectus  becomes
incorrect or incomplete in any material  respect and to provide Columbia Bancorp
with the  information  needed to correct such  inaccuracy or omission.  Suburban
Bancshares shall furnish Columbia Bancorp with such supplemental  information as
may be necessary in order to cause the Proxy Statement/Prospectus, insofar as it
relates to Suburban  Bancshares  and the Suburban  Subsidiaries,  to comply with
Section 6.6 after the mailing thereof to Suburban Bancshares  stockholders.  The
information  provided and the  representations  made by Suburban  Bancshares  to
Columbia  Bancorp in connection  with the  Registration  Statement  described in
Section 6.6, both at the time such information and  representations are provided
and made and at the  Effective  Date,  will be true and accurate in all material
respects and will not contain any false or misleading  statement with respect to
any  material  fact or omit to state any  material  fact  required  to be stated
therein or necessary in order (i) to make the statements  made therein not false
or  misleading,  or  (ii) to  correct  any  statement  contained  in an  earlier
communication  with respect to such  information  or  representations  which has
become false or misleading.  Suburban  Bancshares may rely upon all  information
provided to it by Columbia Bancorp and its representatives in the preparation of
the Proxy  Statement/Prospectus and shall not be liable for any untrue statement
of a  material  fact or any  omission  to  state a  material  fact in the  Proxy
Statement/Prospectus, if such statement is made in reliance upon any information
provided  to it by  Columbia  Bancorp or by any of its  officers  or  authorized
representatives.

          (c) Suburban  Bancshares  shall promptly furnish Columbia Bancorp with
such  information  regarding the Suburban  Bancshares  stockholders  as Columbia
Bancorp  requires to enable it to  determine  what  filings are  required  under
applicable  state  securities  laws.  Suburban  Bancshares  authorizes  Columbia
Bancorp  to  utilize  in  such  filings  the  information   concerning  Suburban
Bancshares  and the  Suburban  Subsidiaries  provided  to  Columbia  Bancorp  in
connection  with,  or  contained  in, the Proxy  Statement/Prospectus.  Suburban
Bancshares shall promptly notify Columbia Bancorp of all  communications,  oral,
or written,  with the SEC  concerning the  Registration  Statement and the Proxy
Statement/Prospectus.

          5.7. Consents.  Suburban Bancshares and the Suburban Subsidiaries will
use  commercially  reasonable  efforts to obtain  any  consents,  approvals,  or
waivers  from  third  parties  required  in  connection  with  the  transactions
contemplated hereunder.

          5.8.  Current  Information;  Advice of Changes.  (a) During the period
from the date of this Plan to the Effective Date, Suburban Bancshares will cause


                                       33
<PAGE>

one or more of its  designated  representatives  to confer on a monthly  or more
frequent basis with  representatives of Columbia Bancorp regarding its business,
operations,  properties,  assets,  and condition  (financial  or otherwise)  and
matters relating to the completion of the transactions  contemplated  herein. As
soon as reasonably available, but in no event more than 45 days after the end of
each calendar  quarter  (other than the last  calendar  quarter of each calendar
year) ending after the date of this Plan,  Suburban  Bancshares  will deliver to
Columbia Bancorp its quarterly reports on Form 10-Q, as filed with the SEC under
the Exchange Act. As soon as reasonably available,  but in no event more than 90
days after the  calendar  year,  Suburban  Bancshares  will  deliver to Columbia
Bancorp its Annual  Report on Form 10-K as filed with the SEC under the Exchange
Act.

          (b) Between  the date of this Plan and the  Effective  Date,  Suburban
Bancshares  shall promptly advise Columbia Bancorp in writing of any fact which,
if  existing  or known at the date  hereof,  would have been  required to be set
forth or disclosed in or pursuant to this Plan or of any fact which, if existing
or known as of the  date  hereof,  would  have  made any of the  representations
contained herein untrue in any material respect.

          5.9. No Solicitation of Other Offers.  Suburban Bancshares agrees that
neither  it nor any of the  Suburban  Subsidiaries  nor any of their  respective
officers,  directors,  and employees shall, and Suburban Bancshares shall direct
and use its best efforts to cause its and the Suburban  Subsidiaries' agents and
representatives (including, without limitation, any investment banker, attorney,
or  accountant  retained  by it or any of the  Suburban  Subsidiaries)  not  to,
directly or indirectly,  take any action to solicit or initiate any inquiries or
the making of any offer or proposal  (including  without limitation any proposal
to stockholders of Suburban Bancshares) with respect to a merger, consolidation,
business combination, liquidation,  reorganization, sale or other disposition of
any significant portion of assets (except problem assets shown on Schedule 5.9),
sale of shares of capital  stock,  or similar  transactions  involving  Suburban
Bancshares  or any of the Suburban  Subsidiaries  (any such inquiry,  offer,  or
proposal,  a  "Suburban  Acquisition  Proposal"),  or,  except in the opinion of
outside counsel to Suburban Bancshares as may be legally required to comply with
the duties the Board of Directors of Suburban  Bancshares  under  applicable law
and upon receipt of a  confidentially  agreement with terms not materially  less
favorable to Suburban  Bancshares  than those  contained in the  Confidentiality
Agreement,  engage in any negotiations  concerning,  or provide any confidential
information or data to, or have any  discussions  with, any person relating to a
Suburban Acquisition Proposal. As of the time hereof, Suburban Bancshares is not
engaged in any  negotiations or discussions  relating to a Suburban  Acquisition
Proposal.  Suburban Bancshares shall promptly notify Columbia Bancorp orally and
in  writing  of,  and keep it fully and  currently  informed  on,  any  Suburban
Acquisition  Proposal  or any  inquiries  with  respect  thereto,  such  written
notification  to include  the  identity  of the Person  making  such  inquiry or
Suburban Acquisition Proposal and such other information with respect thereto as
is reasonably  necessary to apprise  Columbia  Bancorp of the material  terms of
such Suburban  Acquisition  Proposal.  Suburban  Bancshares  shall give Columbia
Bancorp   contemporaneous   written  notice  upon  engaging  in  discussions  or
negotiations with, or providing any information regarding Suburban Bancshares or
any of the  Suburban  Subsidiaries  to,  any such  person  regarding  a Suburban
Acquisition Proposal.



                                       34
<PAGE>

          5.10. Affiliate  Agreements.  Within 10 days of the date of this Plan,
Suburban  Bancshares  shall deliver or cause to be delivered to Columbia Bancorp
memoranda  substantially  in the form  attached as Appendix V (the  "Affiliates'
Memoranda")  and agreements  substantially  in the form attached as Appendix VII
(the "Support  Agreements")  from each of its  executive  officers and directors
(and  shall use  commercially  reasonable  efforts to obtain  and  deliver  such
memoranda and agreements  from each  stockholder of Suburban  Bancshares who (a)
may be deemed  to be an  "affiliate"  of  Suburban  Bancshares,  as that term is
defined  for  purposes  of the SEC Rules 145 and 405,  or (b) may be  restricted
under the  accounting  rules  applicable to a  pooling-of-interests).  Under the
terms of the Affiliates' Memoranda,  each such officer,  director or stockholder
shall  acknowledge  and agree  (i) to abide by all  limitations  imposed  by the
Securities  Act  and  by  all  rules,  regulations,   and  releases  promulgated
thereunder  by the SEC with  respect  to the sale or  other  disposition  of the
shares of the Common  Stock of  Columbia  Bancorp to be  received by such person
pursuant to the Holding  Company  Merger,  and (ii) to abide by all  limitations
imposed  by the  accounting  rules  for the  Mergers  to be  accounted  for as a
pooling-of-interests.  Under  the  terms of the  Support  Agreements,  each such
officer,  director, or stockholder shall agree to support and vote the shares of
Common Stock of Suburban  Bancshares owned or controlled by him or her to ratify
and confirm this Plan and the Holding Company Merger.

          5.11.  Pooling-of-Interests.  Suburban  Bancshares  shall use its best
efforts not to permit any of the directors,  officers, employees,  stockholders,
agents,  consultants,  or other representatives of Suburban Bancshares or any of
the  Suburban  Subsidiaries  to take any  action  that would  preclude  Columbia
Bancorp  from  treating  the  Mergers as a  pooling-of-interests  for  financial
reporting purposes.

          5.12.  Taxes.  Suburban  Bancshares  shall have filed with appropriate
federal, state, county, municipal, or foreign taxing authorities all tax returns
required to be filed (taking any applicable extensions into consideration) on or
before  the  Effective  Date and shall  have paid (or shall  have made  adequate
provision  or set up an  adequate  actual  reserve on the  financial  statements
referred to in Section  3.2 for the payment of) all taxes  imposed by any taxing
authority with respect to any Pre-Closing  Tax Period (as hereinafter  defined),
together with any interest,  additions,  or penalties related to any such taxes.
For purposes of this Section 5.12, any reference to Suburban Bancshares shall be
deemed to include any corporation more than 50% of the outstanding capital stock
(by vote or value) of which is owned by Suburban  Bancshares.  "Pre-Closing  Tax
Period" shall mean (i) each taxable  period that ends on or before the Effective
Date,  and (ii) any  taxable  period  that  includes  (but  does not end on) the
Effective  Date (the  period  described  in this  clause  (ii)  being  hereafter
referred  to as a  "Straddle  Period").  In the  case of any tax for a  Straddle
Period,  the covenant in this  Section 5.12 shall be limited to the  Pre-Closing
Tax Amount determined as follows:

               (a) In the  case of a  periodic  tax  that is not  based  on
     income  or  receipts   (e.g.,   an  ad  valorem   property  tax),  the
     "Pre-Closing  Tax  Amount"  shall be an amount  equal to the amount of
     such tax for the entire Straddle  Period  multiplied by a fraction the


                                       35
<PAGE>

     numerator of which is the number of days elapsed between the beginning
     of the Straddle  Period and the Effective Date, and the denominator of
     which is the total number of days in the Straddle Period; and

               (b) in the  case of any  other  tax,  the  "Pre-Closing  Tax
     Amount" shall be the amount of such tax for which Suburban  Bancshares
     would  have been  liable if the  Straddle  Period  had ended as of the
     close of business on the day of the Effective Date.

          5.13.  Public  Announcements.  Between  the date of this  Plan and the
Effective Date, Suburban  Bancshares and the Suburban  Subsidiaries will consult
with Columbia  Bancorp before issuing any press release or otherwise  making any
public  statements with respect to this Plan and the  transactions  contemplated
hereby  and  shall  not issue any such  press  release  or make any such  public
statement prior to such  consultation,  except as counsel may advise is required
by law.

     6.  Covenants  of Columbia  Bancorp.  Except as  otherwise  consented to in
writing by Suburban  Bancshares  after the date of this Plan,  Columbia  Bancorp
covenants to and agrees with Suburban Bancshares as follows:

          6.1. Information.  (a) Columbia Bancorp shall, upon reasonable notice,
give to Suburban Bancshares and to its officers, accountants, counsel, financial
advisors, and other representatives, reasonable access during Columbia Bancorp's
and the Columbia Subsidiaries' normal business hours throughout the period prior
to the Effective Date to all of their properties, books, contracts, commitments,
reports of examination  (consistent with applicable  law),  depositor lists, and
records.  Columbia  Bancorp and the  Columbia  Subsidiaries  will,  at their own
expense,   furnish  Suburban   Bancshares  during  such  period  with  all  such
information  concerning  their  affairs as Suburban  Bancshares  may  reasonably
request,  including  information  for use in  determining  if the  conditions of
Section  8.1  through  Section  8.09  have  been  satisfied  and  for use in any
necessary filings to be made by Suburban Bancshares or the Suburban Subsidiaries
with appropriate governmental regulatory authorities.

          (b) Columbia  Bancorp  acknowledges  that  information  received by it
concerning  Suburban   Bancshares  and  the  Suburban   Subsidiaries  and  their
operations is subject to the  Confidentiality  Agreement.  Without  limiting the
foregoing, Columbia Bancorp will not, and will cause its representatives not to,
use any information  obtained  pursuant to Section 5.1 for any purpose unrelated
to the  consummation of the transactions  contemplated by this Plan.  Subject to
the requirements of law, Columbia Bancorp will keep confidential, and will cause
its representatives to keep confidential, all information and documents obtained
pursuant  to Section  5.1  unless  such  information  (i) was  already  known to
Columbia Bancorp,  (ii) becomes available to Columbia Bancorp from other sources
not known by Columbia Bancorp to be bound by a confidentiality obligation, (iii)
is disclosed with prior written approval of Suburban Bancshares and the Suburban
Subsidiaries,  or  (iv)  is or  becomes  readily  ascertainable  from  published
information or trade  sources.  In the event that this Plan is terminated or the
transactions  contemplated  by this Plan shall otherwise fail to be consummated,
Columbia  Bancorp  shall  promptly  cause all copies of  documents  or  extracts
thereof  containing  information  and  data as to  Suburban  Bancshares  and the


                                       36
<PAGE>

Suburban  Subsidiaries  to be  returned.  In the  event  that this Plan has been
terminated  or the  transactions  contemplated  hereby  shall have  failed to be
consummated  and Columbia  Bancorp or any of its agents or  representatives  are
requested  or  required  (by  oral  questions,  interrogatories,   requests  for
information,  or documents in legal proceedings,  subpoena,  civil investigative
demand, or other similar process) to disclose any of the materials  delivered or
obtained  pursuant  to  the  Plan  (the  "Suburban  Bancshares  Documentation"),
Columbia Bancorp shall provide Suburban Bancshares with prompt written notice of
any  such  request  or  requirement  so  that  Suburban  Bancshares  may  seek a
protective order or other appropriate remedy. If, in the absence of a protective
order or other remedy,  Columbia Bancorp or any of its agents or representatives
are compelled to disclose any of such Suburban  Bancshares  Documentation to any
tribunal or else stand liable for  contempt or suffer other  censure or penalty,
Columbia  Bancorp  or its  agents  or  representatives  may,  without  liability
hereunder,  disclose  to  such  tribunal  only  that  portion  of  the  Suburban
Bancshares  Documentation  which Columbia  Bancorp's  counsel  advises  Columbia
Bancorp is legally  required to be disclosed,  provided,  that Columbia  Bancorp
shall exercise its best efforts to preserve the  confidentiality of the Suburban
Bancshares  Documentation,  including,  without limitation,  by cooperating with
Suburban Bancshares to obtain an appropriate  protective order or other reliable
assurance that confidential  treatment will be accorded the Suburban  Bancshares
Documentation by such tribunal.

          6.2.  Events  Preceeding  Effectiveness.   Columbia  Bancorp  and  the
Columbia  Subsidiaries will use commercially  reasonable  efforts to assure that
each of the events specified in Section 2 which require action on its part shall
occur on or before the Effective Date.

          6.3.  Applications  to  Government  Regulatory  Authorities.  Columbia
Bancorp and the Columbia  Subsidiaries  will promptly  prepare and file with the
appropriate  governmental  regulatory  authorities an application requesting the
regulatory approvals referred to in Sections 2(g), 2(h), 2(i), and 2(j) and will
use  commercially   reasonable  efforts  to  secure  favorable  action  on  such
applications,  including without limitation  commercially  reasonable efforts to
pursue an appeal of a denial of a regulatory approval.

          6.4. Conduct of Business.  After the date of this Plan and pending the
Effective Date, (a) Columbia Bancorp and the Columbia  Subsidiaries will conduct
their  business  only in the  ordinary  course;  (b)  Columbia  Bancorp  and the
Columbia  Subsidiaries  shall  not  effect  any  change  or  amendment  in their
respective  charters or by-laws;  (c) except  with  respect to Columbia  Bancorp
stock  options  outstanding  on the date of this Plan  which  are or may  become
subject to exercise,  Columbia Bancorp and the Columbia  Subsidiaries  shall not
change their  authorized,  issued,  or outstanding  capital stock;  (d) Columbia
Bancorp shall declare regular  quarterly cash dividends in respect of its Common
Stock at the rate of not in excess of $.10 per share; (e) except as disclosed in
Schedule  6.4(e),  Columbia  Bancorp  and the  Columbia  Subsidiaries  shall not
increase  employee  compensation or benefit levels (except for annual  increases
not in excess of amounts  established by its regular past practices),  shall not


                                       37
<PAGE>

establish or make any increase in any employment,  compensation, bonus, pension,
option, incentive or deferred compensation,  retirement,  death, profit sharing,
or  similar  agreements  or  benefits  of any of its  past,  present,  or future
officers or employees,  and shall not modify the existing employment  agreements
with  any  officers  or  employees;   (f)  Columbia  Bancorp  and  the  Columbia
Subsidiaries  shall not make any change in any of their  accounting  policies or
practices unless required by generally  accepted  accounting  principles or take
any  action  which  would  cause  the  Mergers  not  to be  accounted  for  as a
pooling-of-interests;  and (g) Columbia  Bancorp and the  Columbia  Subsidiaries
shall not incur any liability for borrowed  money except in the ordinary  course
of their banking  business (i.e.,  may only incur variable rate loans with terms
not greater than one year) or place upon or permit any lien or encumbrance  upon
any of their  properties  or assets  except  liens of the type  permitted in the
exceptions to Section 4.7. Pending the Effective Date,  Columbia Bancorp and the
Columbia Subsidiaries shall (x) use commercially  reasonable efforts to preserve
their  business  organization  and assets and to keep  available the services of
their  full-time  officers  and  employees,  (y)  continue in effect the present
method of conducting their business, and (z) consult with Suburban Bancshares as
to making  decisions  or actions in matters (i) other than those in the ordinary
course  of  business,  or (ii)  except  as  disclosed  in  Schedule  6.4(z)(ii),
involving any capital expenditures in excess of $25,000.

          6.5.  Columbia  Bancorp Common Stock.  (a) At the Effective  Date, the
Columbia  Bancorp  Common  Stock  to be  issued  in  exchange  for the  Suburban
Bancshares  Common  Stock  pursuant  to the  terms  of this  Plan  shall be duly
authorized,  validly issued, fully paid, and non-assessable,  free of preemptive
rights and free and clear of all liens, encumbrances, or restrictions created by
or  through  Columbia  Bancorp,  with no  personal  liability  attaching  to the
ownership thereof.  The Columbia Bancorp Common Stock to be issued upon exchange
for the Suburban Bancshares Common Stock pursuant to the terms of this Plan will
be issued in all  material  respects in  accordance  with  applicable  state and
federal laws, rules, and regulations.

          (b) Columbia Bancorp shall have reserved a sufficient number of shares
of its Common Stock for issuance upon exercise of the option granted pursuant to
the Stock Option  Agreement  attached as Appendix IV, which is to be executed by
Columbia Bancorp and Suburban Bancshares, and shall have taken all other actions
necessary to fulfill its obligations thereunder.

          6.6. Registration of Shares.  Columbia Bancorp, with the assistance of
Suburban Bancshares and its  representatives,  will promptly file a Registration
Statement with the SEC which shall include a joint proxy  statement for Columbia
Bancorp  and  Suburban  Bancshares  and a  prospectus  which  shall  satisfy all
applicable  requirements  of applicable  state and federal  laws,  including the
Securities Act, the Exchange Act, and applicable  state  securities laws and the
rules and  regulations  thereunder  (such joint proxy  statement and prospectus,
together  with any and all  amendments  or  supplements  thereto,  being  herein
referred to as the "Proxy Statement/Prospectus," and the various documents to be
filed by Columbia  Bancorp under the Securities Act with the SEC to register the
Columbia  Bancorp Common Stock into which shares of the Common Stock of Suburban
Bancshares  held  by  stockholders  will  be  converted,   including  the  Proxy


                                       38
<PAGE>

Statement/Prospectus,  are referred to herein as the "Registration  Statement").
The number of shares to be registered will be an amount  sufficient to allow all
of the shares of the Common Stock of Columbia  Bancorp  issued to holders of the
Common Stock of Suburban Bancshares pursuant to this Plan to be registered under
the Securities Act. Columbia Bancorp will use commercially reasonable efforts to
secure  the   effectiveness  of  the  Registration   Statement  and,  after  the
Registration  Statement  has been declared  effective,  will issue the shares so
registered  to the  holders of the Common  Stock of Suburban  Bancshares  on the
Effective Date. Columbia Bancorp may rely upon all information provided to it by
Suburban   Bancshares  and  its   representatives  in  the  preparation  of  the
Registration  Statement,  any  post-effective  amendment  thereto  and the Proxy
Statement and shall not be liable for any untrue statement of a material fact or
any  omission  to  state a  material  fact in the  Registration  Statement,  the
post-effective  amendment,  or the Proxy Statement, if such statement is made in
reliance upon any information provided to it by Suburban Bancshares or by any of
its officers or authorized representatives. Columbia Bancorp shall promptly take
all such actions as may be necessary  or  appropriate  in order to comply in all
material  respects  with all  applicable  securities  laws of any  state  having
jurisdiction  over the  transactions  contemplated  by this Plan and the Holding
Company Merger.  Columbia Bancorp shall furnish Suburban  Bancshares with copies
of all such filings and keep Suburban  Bancshares advised of the status thereof.
Columbia   Bancorp   shall   promptly   notify   Suburban   Bancshares   of  all
communications,  oral or  written,  with  the SEC  concerning  the  Registration
Statement  and the  Proxy  Statement/Prospectus.  Prior to the  Effective  Date,
Columbia  Bancorp will cause the listing of the Common Stock of Columbia Bancorp
deliverable  pursuant  to  this  Plan on The  National  Market  of The  National
Association of Securities Dealers, Inc. ("NASDAQ").

          6.7.   Meeting  of   Stockholders   of  Columbia   Bancorp;   Document
Preparation.  (a) Columbia  Bancorp shall duly call and convene a meeting of its
stockholders  to act  upon  the  transactions  contemplated  hereby  as  soon as
practicable.  Except to the extent  legally  required  for the  discharge by the
board of directors of its  fiduciary  duties,  Columbia  Bancorp will  recommend
approval of this Plan and the Holding  Company  Merger to its  stockholders  and
will use commercially reasonable efforts to obtain a favorable vote thereon. The
calling and holding of such  meeting and all notices,  transactions,  documents,
and information related thereto will be in compliance with all applicable laws.

          (b)  Columbia  Bancorp  shall  furnish  such  information   concerning
Columbia Bancorp and the Columbia Subsidiaries as is necessary in order to cause
the Proxy Statement/Prospectus,  insofar as it relates to such corporations,  to
comply with Section 6.6.  Columbia  Bancorp agrees  promptly to advise  Suburban
Bancshares if at any time prior to the Columbia Bancorp  stockholders'  meeting,
any information  provided by Columbia Bancorp in the Proxy  Statement/Prospectus
becomes  incorrect or incomplete in any material respect and to provide Suburban
Bancshares with the  information  needed to correct such inaccuracy or omission.
Columbia  Bancorp  shall  furnish  Suburban  Bancshares  with such  supplemental
information    as   may   be   necessary   in   order   to   cause   the   Proxy
Statement/Prospectus, insofar as it relates to Columbia Bancorp and the Columbia
Subsidiaries,  to comply with Section 6.6 after the mailing  thereof to Columbia


                                       39
<PAGE>

Bancorp  stockholders.  The information provided and the representations made by
Columbia   Bancorp  to  Suburban   Bancshares  in  connection   with  the  Proxy
Statement/Prospectus,  both at the time such information and representations are
provided and made and at the  Effective  Date,  will be true and accurate in all
material  respects and will not contain any false or misleading  statement  with
respect to any material  fact or omit to state any material  fact required to be
stated therein or necessary in order (i) to make the statements made therein not
false or  misleading,  or (ii) to correct any statement  contained in an earlier
communication  with respect to such  information  or  representations  which has
become  false or  misleading.  Columbia  Bancorp  may rely upon all  information
provided to it by Suburban Bancshares and its representatives in the preparation
of the  Proxy  Statement/Prospectus  and  shall  not be  liable  for any  untrue
statement  of a material  fact or any  omission to state a material  fact in the
Proxy  Statement/Prospectus,  if such  statement  is made in  reliance  upon any
information  provided to it by Suburban  Bancshares or by any of its officers or
authorized representatives.

          6.8. Consents. Columbia Bancorp and the Columbia Subsidiaries will use
commercially  reasonable efforts to obtain any consents,  approvals,  or waivers
from third parties  required in connection  with the  transactions  contemplated
hereunder.

          6.9.  Current  Information;  Advice of Changes.  (a) During the period
from the date of this Plan to the Effective  Date,  Columbia  Bancorp will cause
one or more of its  designated  representatives  to confer on a monthly  or more
frequent  basis  with  representatives  of  Suburban  Bancshares  regarding  its
business, operations, properties, assets, and condition (financial or otherwise)
and matters relating to the completion of the transactions  contemplated herein.
As soon as reasonably available, but in no event more than 45 days after the end
of each calendar  quarter (other than the last calendar quarter of each calendar
year)  ending  after the date of this Plan,  Columbia  Bancorp  will  deliver to
Suburban  Bancshares  its quarterly  reports on Form 10-Q, as filed with the SEC
under the Exchange  Act. As soon as reasonably  available,  but in no event more
than 90 days after the calendar year,  Columbia Bancorp will deliver to Suburban
Bancshares  its  Annual  Report  on Form  10-K as filed  with the SEC  under the
Exchange Act.

          (b) Between  the date of this Plan and the  Effective  Date,  Columbia
Bancorp shall promptly advise Suburban  Bancshares in writing of any fact which,
if  existing  or known at the date  hereof,  would have been  required to be set
forth or disclosed in or pursuant to this Plan or of any fact which, if existing
or known as of the  date  hereof,  would  have  made any of the  representations
contained herein untrue in any material respect.

          6.10. No  Solicitation of Other Offers.  Columbia  Bancorp agrees that
neither  it nor any of the  Columbia  Subsidiaries  nor any of their  respective
officers,  directors, and employees shall, and Columbia Bancorp shall direct and
use its best  efforts  to cause its and the  Columbia  Subsidiaries'  agents and
representatives (including, without limitation, any investment banker, attorney,
or  accountant  retained  by it or any of the  Columbia  Subsidiaries)  not  to,
directly or indirectly,  take any action to solicit or initiate any inquiries or
the making of any offer or proposal  (including  without limitation any proposal
to  stockholders of Columbia  Bancorp) with respect to a merger,  consolidation,


                                       40
<PAGE>

business combination, liquidation,  reorganization, sale or other disposition of
any  significant  portion of assets  (except  problem  assets  shown on Schedule
6.10),  sale of shares of  capital  stock,  or  similar  transactions  involving
Columbia Bancorp or any of the Columbia  Subsidiaries (any such inquiry,  offer,
or proposal, a "Columbia  Acquisition  Proposal"),  or, except in the opinion of
outside  counsel to Columbia  Bancorp as may be legally  required to comply with
the duties the Board of Directors of Columbia  Bancorp under  applicable law and
upon  receipt  of a  confidentially  agreement  with terms not  materially  less
favorable  to  Columbia  Bancorp  than those  contained  in the  Confidentiality
Agreement,  engage in any negotiations  concerning,  or provide any confidential
information or data to, or have any  discussions  with, any person relating to a
Columbia Acquisition  Proposal.  As of the time hereof,  Columbia Bancorp is not
engaged in any  negotiations or discussions  relating to a Columbia  Acquisition
Proposal.  Columbia Bancorp shall promptly notify Suburban Bancshares orally and
in  writing  of,  and keep it fully and  currently  informed  on,  any  Columbia
Acquisition  Proposal  or any  inquiries  with  respect  thereto,  such  written
notification  to include  the  identity  of the Person  making  such  inquiry or
Columbia Acquisition Proposal and such other information with respect thereto as
is reasonably  necessary to apprise Suburban Bancshares of the material terms of
such  Columbia  Acquisition  Proposal.  Columbia  Bancorp  shall  give  Suburban
Bancshares  contemporaneous  written  notice  upon  engaging in  discussions  or
negotiations  with, or providing any information  regarding  Columbia Bancorp or
any of the  Columbia  Subsidiaries  to,  any such  person  regarding  a Columbia
Acquisition Proposal.

          6.11. Affiliate  Agreements.  Within 10 days of the date of this Plan,
Columbia  Bancorp shall deliver or cause to be delivered to Suburban  Bancshares
memoranda  substantially  in the form attached as Appendix VI (the  "Affiliates'
Memoranda") and agreements  substantially  in the form attached as Appendix VIII
(the "Support  Agreements")  from each of its  executive  officers and directors
(and  shall use  commercially  reasonable  efforts to obtain  and  deliver  such
memoranda and agreements  from each  stockholder of Columbia  Bancorp who may be
restricted  under the accounting  rules  applicable to a  pooling-of-interests).
Under the terms of the  Affiliates'  Memoranda,  each such officer,  director or
stockholder shall  acknowledge and agree to abide by all limitations  imposed by
the   accounting   rules   for   the   Mergers   to  be   accounted   for  as  a
pooling-of-interests.  Under  the  terms of the  Support  Agreements,  each such
officer,  director, or stockholder shall agree to support and vote the shares of
Common Stock of Columbia Bancorp owned or controlled by him or her to ratify and
confirm this Plan and the Holding Company Merger.

          6.12.  Pooling-of-Interests.  Columbia  Bancorp  shall  use  its  best
efforts not to permit any of the directors,  officers, employees,  stockholders,
agents,  consultants, or other representatives of Columbia Bancorp or any of the
Columbia  Subsidiaries to take any action that would preclude  Columbia  Bancorp
from  treating the Mergers as a  pooling-of-interests  for  financial  reporting
purposes.

          6.13.  Taxes.  Columbia  Bancorp  shall have  filed  with  appropriate
federal, state, county, municipal, or foreign taxing authorities all tax returns
required to be filed (taking any applicable extensions into consideration) on or
before  the  Effective  Date and shall  have paid (or shall  have made  adequate
provision  or set up an  adequate  actual  reserve on the  financial  statements


                                       41
<PAGE>

referred to in Section  4.2 for the payment of) all taxes  imposed by any taxing
authority with respect to any Pre-Closing  Tax Period (as hereinafter  defined),
together with any interest,  additions,  or penalties related to any such taxes.
For purposes of this Section 6.13,  any  reference to Columbia  Bancorp shall be
deemed to include any corporation more than 50% of the outstanding capital stock
(by vote or  value)  of which is owned by  Columbia  Bancorp.  "Pre-Closing  Tax
Period"  shall mean each  taxable  period  that ends on or before the  Effective
Date.

          6.14.  Public  Announcements.  Between  the date of this  Plan and the
Effective Date, Columbia Bancorp and the Columbia Subsidiaries will consult with
Suburban  Bancshares  before  issuing any press release or otherwise  making any
public  statements with respect to this Plan and the  transactions  contemplated
hereby  and  shall  not issue any such  press  release  or make any such  public
statement prior to such  consultation,  except as counsel may advise is required
by law.

     7. Conditions Precedent to Columbia Bancorp's Obligations. Unless waived in
writing by Columbia Bancorp in its sole discretion,  all obligations of Columbia
Bancorp  hereunder  shall  be  subject  to the  fulfillment  prior  to or at the
Effective Date of the following conditions:

          7.1. Representations,  Warranties,  and Covenants. The representations
and  warranties of Suburban  Bancshares  herein  contained  shall be true in all
material respects as of the date hereof, shall be deemed made again at and as of
the Effective Date, and shall be true in all material respects as so made again;
Suburban  Bancshares and the Suburban  Subsidiaries  shall have performed in all
material  respects all obligations and agreements,  and complied in all material
respects with all covenants and conditions required by this Plan to be performed
or complied with by them on or prior to the Effective Date; and Columbia Bancorp
shall have received from Suburban  Bancshares an officers'  certificate to their
knowledge,  information,  and  belief in such  detail as  Columbia  Bancorp  may
reasonably  request,  dated the Effective Date and signed by its Chief Executive
Officer and its Secretary, to the foregoing effect.

          7.2.  No Adverse  Changes.  There  shall not have been any  materially
adverse change in the condition (financial or otherwise), results of operations,
assets,  liabilities,  or  business  of  Suburban  Bancshares  and the  Suburban
Subsidiaries,  taken as a whole,  from December 31, 1998 to the Effective  Date.
For purposes of this Section 7.2, a "materially  adverse  change" shall include,
without  limitation,  (a) a reduction  of the  stockholders'  equity of Suburban
Bancshares to less than $19,366,000 (plus such additions to stockholders' equity
as a result of the  issuance  of any Common  Stock after the date of this Plan),
(b) a decrease in the net income of Suburban  Bancshares  for calendar year 1999
and  through the  Effective  Date to less than  $625,000,  or (c) an increase in
Suburban  Bancshares'  ratio of  non-performing  assets to total assets to above
1.5%,  and a  "materially  adverse  change"  shall not  include  expenses of the
transactions under this Plan.

          7.3.  Events  Preceeding  the Effective  Date.  Each of the events set
forth in  Section  2 shall  have  occurred  and any  other  required  regulatory
approvals shall have been obtained.



                                       42
<PAGE>

          7.4.  Other  Evidence.  Suburban  Bancshares  shall have  delivered to
Columbia Bancorp such further  certificates and documents  evidencing due action
in  accordance  with this Plan,  including  certified  copies of all  applicable
proceedings of  stockholders  and directors of Suburban  Bancshares and Suburban
Bank pertaining to the  transactions  under this Plan, as Columbia Bancorp shall
reasonably request.

          7.5. No Adverse Proceedings,  Events, or Regulatory  Requirements.  No
action  or  proceeding   against   Columbia  Bancorp  or  any  of  the  Columbia
Subsidiaries or against Suburban Bancshares or any of the Suburban  Subsidiaries
shall  be  pending  which  seeks to  prevent  consummation  of the  transactions
contemplated  by this Plan;  and no order of any court  shall have been  entered
which prohibits consummation of the Mergers and the transactions contemplated by
this Plan. No approval,  consent,  waiver, or  administrative  action shall have
included  any  condition  or  requirement  that would (i) result in a materially
adverse effect on Columbia Bancorp or Suburban Bancshares, or (ii) so materially
and  adversely  affect the  economic  or business  benefits of the Mergers  that
Columbia  Bancorp,  in the sole  judgment  of Columbia  Bancorp,  would not have
entered into this Plan had such  conditions  or  requirements  been known at the
date hereof.

          7.6.  Consents,  Etc.  All  requisite  consents,  approvals,  waivers,
undertakings,  memoranda,  agreements,  exercises,  and  terminations  by  third
parties which Suburban Bancshares and the Suburban  Subsidiaries have covenanted
to use commercially  reasonable  efforts to obtain under Sections 5.7, 5.10, and
5.11 shall have been  obtained  by  Suburban  Bancshares  or waived by  Columbia
Bancorp.

          7.7.  Opinion of Tax Counsel.  Columbia Bancorp shall have received an
opinion from its tax counsel,  dated the  Effective  Date, in form and substance
reasonably  satisfactory to Columbia Bancorp,  covering the matters set forth in
Appendix IX. In rendering  such opinion,  tax counsel shall require  delivery of
and rely upon certain  representation  letters  delivered  by Columbia  Bancorp,
Suburban  Bancshares,  and certain  stockholders of Suburban  Bancshares,  which
letters shall be in form and substance satisfactory to tax counsel.

          7.8. Fairness Opinion.  Columbia Bancorp shall have received a written
opinion  from  Austin  Financial  Services,   Inc.  (or  such  other  recognized
investment firm as Columbia Bancorp may select),  dated  contemporaneously  with
the date of the Proxy  Statement,  to the effect  that the  consideration  to be
received in the Holding  Company Merger is fair to the  stockholders of Columbia
Bancorp from a financial point of view.

          7.9.  Opinion of  Counsel.  Columbia  Bancorp  shall have  received an
opinion of counsel to Suburban Bancshares, dated the Effective Date, in form and
substance reasonably satisfactory to Columbia Bancorp,  covering the matters set
forth in Appendix X.

          7.10.  Pooling-of-Interests  Accounting.  Columbia  Bancorp shall have
received  a letter  from KPMG LLP to the effect  that the  Mergers  qualify  for
pooling-of-interests accounting treatment if consummated in accordance with this


                                       43
<PAGE>

Plan;  provided,  that such condition  shall be void and of no further force and
effect if Columbia Bancorp has not received such letter because of any action or
inaction of Columbia Bancorp.  In rendering such letter,  KPMG LLP shall require
delivery of and rely upon certain  representation  letters delivered by Columbia
Bancorp and  Suburban  Bancshares  and a pooling  letter  delivered by Stegman &
Company, which letters shall be in form and substance satisfactory to KPMG LLP.

     8. Conditions Precedent to Suburban Bancshares' Obligations.  Unless waived
in writing by Suburban  Bancshares in its sole  discretion,  all  obligations of
Suburban Bancshares hereunder shall be subject to the fulfillment prior to or at
the Effective Date of the following conditions:

          8.1. Representations,  Warranties,  and Covenants. The representations
and  warranties  of  Columbia  Bancorp  herein  contained  shall  be true in all
material respects as of the date hereof, shall be deemed made again at and as of
the Effective Date, and shall be true in all material respects as so made again;
Columbia  Bancorp and the  Columbia  Subsidiaries  shall have  performed  in all
material  respects all obligations and agreements,  and complied in all material
respects with all covenants and conditions required by this Plan to be performed
or  complied  with by them on or  prior  to the  Effective  Date;  and  Suburban
Bancshares shall have received from Columbia Bancorp an officers' certificate to
their  knowledge,  information and belief in such detail as Suburban  Bancshares
may  reasonably  request,  dated  the  Effective  Date and  signed  by its Chief
Executive Officer and its Secretary, to the foregoing effect.

          8.2.  No Adverse  Changes.  There  shall not have been any  materially
adverse change in the condition (financial or otherwise), results of operations,
assets,   liabilities,   or  business  of  Columbia  Bancorp  and  the  Columbia
Subsidiaries,  taken as a whole,  from December 31, 1998 to the Effective  Date.
For purposes of this Section 8.2, a "materially  adverse  change" shall include,
without  limitation,  (a) a reduction  of the  stockholders'  equity of Columbia
Bancorp to less than $38,000,000 (plus such additions to stockholders' equity as
a result of the issuance of any Common Stock after the date of this Plan), (b) a
decrease  in the net  income of  Columbia  Bancorp  for  calendar  year 1999 and
through  the  Effective  Date to less than  $3,400,000,  or (c) an  increase  in
Columbia Bancorp's ratio of non-performing assets to total assets to above 1.5%,
and a "materially adverse change" shall not include expenses of the transactions
under this Plan.

          8.3. Events Preceding the Effective Date. Each of the events set forth
in Section 2 shall have  occurred and any other  required  regulatory  approvals
shall have been obtained.

          8.4. Other Evidence. Columbia Bancorp shall have delivered to Suburban
Bancshares  such further  certificates  and documents  evidencing  due action in
accordance  with  this  Plan,  including  certified  copies  of  all  applicable
proceedings of stockholders  and directors of Columbia Bancorp and Columbia Bank
pertaining to the  transactions  under this Plan, as Suburban  Bancshares  shall
reasonably request.



                                       44
<PAGE>

          8.5. No Adverse Proceedings,  Events, or Regulatory  Requirements.  No
action  or  proceeding   against   Columbia  Bancorp  or  any  of  the  Columbia
Subsidiaries or against Suburban Bancshares or any of the Suburban  Subsidiaries
shall  be  pending  which  seeks to  prevent  consummation  of the  transactions
contemplated  by this Plan;  and no order of any court  shall have been  entered
which prohibits consummation of the Mergers and the transactions contemplated by
this Plan. No approval,  consent,  waiver, or  administrative  action shall have
included  any  condition  or  requirement  that would (i) result in a materially
adverse effect on Columbia Bancorp or Suburban Bancshares, or (ii) so materially
and  adversely  affect the  economic  or business  benefits of the Mergers  that
Suburban Bancshares, in the sole judgment of Suburban Bancshares, would not have
entered into this Plan had such  conditions  or  requirements  been known at the
date hereof.

          8.6. Consents,  Etc. All requisite  consents,  approvals,  or waivers,
undertakings,  memoranda,  agreements,  exercises,  and  terminations  by  third
parties which  Columbia  Bancorp has covenanted to use  commercially  reasonable
efforts to obtain under Sections 6.8, 6.11, and 6.12 shall have been obtained by
Columbia Bancorp or waived by Suburban Bancshares.

          8.7. Opinion of Tax Counsel.  Suburban  Bancshares shall have received
an opinion from tax counsel to Columbia  Bancorp,  dated the Effective  Date, in
form and substance reasonably satisfactory to Suburban Bancshares,  covering the
matters set forth in Appendix IX. In rendering  such opinion,  tax counsel shall
require delivery of and rely upon certain  representation  letters  delivered by
Columbia  Bancorp,  Suburban  Bancshares,  and certain  stockholders of Suburban
Bancshares,  which letters shall be in form and  substance  satisfactory  to tax
counsel.

          8.8.  Fairness  Opinion.  Suburban  Bancshares  shall have  received a
written  opinion  from  Danielson  Associates  Inc.  (or such  other  recognized
investment firm as Suburban Bancshares may select), dated contemporaneously with
the date of the Proxy  Statement,  to the effect  that the  consideration  to be
received in the Holding  Company Merger is fair to the  stockholders of Suburban
Bancshares from a financial point of view.

          8.9.  Opinion of Counsel.  Suburban  Bancshares shall have received an
opinion of counsel to Columbia  Bancorp,  dated the Effective  Date, in form and
substance reasonably  satisfactory to Suburban Bancshares,  covering the matters
set forth in Appendix XI.

     9. Terms of the Holding Company Merger.

          9.1.  Structure of the Holding Company Merger.  At the Effective Date,
subject to the terms and conditions of this Plan, Suburban Bancshares will merge
with and into Columbia  Bancorp,  the separate  corporate  existence of Suburban
Bancshares  shall cease,  and Columbia  Bancorp shall  continue as the successor
corporation  (the "Successor  Corporation").  From and after the Effective Date,
the Holding  Company  Merger  shall have the  effects  set forth in MD.  GENERAL
CORPORATION LAW SS. 3-114 and DE. GENERAL CORPORATION LAW SS.SS. 259 - 261.



                                       45
<PAGE>

          9.2.  Conversion  of Stock;  Conversion  Ration.  (a) On the Effective
Date, each share of the Suburban Bancshares Common Stock outstanding immediately
prior to the Effective Date, shall, without any action on the part of the holder
thereof,  be  canceled  and  converted  into the  number of shares of  Successor
Corporation Common Stock (rounded to the nearest 0.01 share) which results after
multiplication  by the Conversion  Ratio.  The Conversion Ratio shall be 0.2196;
provided,  however,  that  the  Conversion  Ratio  shall be  increased  (but not
decreased) to the extent  necessary to cause the average  market value (based on
the mean of the daily high and low trade prices,  or, if none, of the daily high
bid and low asked prices,  reported on NASDAQ) of Columbia  Bancorp Common Stock
(for each of the 10 trading  days ending on the trading  date that is three days
before the Effective Date) received for each share of Suburban Bancshares Common
Stock to be $3.00 per share;  provided,  further  that such  adjustment  may not
increase the Conversion Ratio above 0.2338.

          (b) No  certificates  for fractional  shares of Successor  Corporation
Common Stock shall be issued; in lieu thereof, each holder otherwise entitled to
a fractional  interest shall receive an amount in cash based on the market value
of Columbia  Bancorp Common Stock as determined in Section 9.2. Each such holder
shall have no other rights with respect to such fractional interest.

          9.3. Exchange  Procedure.  (a) After the Effective Date,  certificates
representing such shares of Common Stock of Suburban  Bancshares shall represent
the  right to  receive  certificates  representing  shares  of  Common  Stock of
Successor  Corporation  determined in accordance with Section 9.2; such Suburban
Bancshares certificates at any time after the Effective Date may be exchanged by
the holders thereof for new certificates for the appropriate number of shares of
Common Stock of Successor  Corporation  by forwarding  such Suburban  Bancshares
Common Stock  certificates  and the letter of transmittal  provided by Successor
Corporation to the transfer agent for Successor  Corporation  Common Stock,  and
the payment of cash in lieu of fractions,  dividends, and other distributions on
said  stock may be  withheld  until the  Suburban  Bancshares  certificates  are
surrendered for exchange to the transfer agent for Successor  Corporation Common
Stock;  when such new  certificates  are issued,  the holders  thereof  shall be
entitled  to be paid the  amount  (without  any  interest  thereon)  of all such
withheld cash in lieu of fractions, dividends, or other distributions which have
theretofore  become  payable  with  respect  to such  shares of Common  Stock of
Successor Corporation.

          (b) As soon as possible  after the Effective  Date, the transfer agent
for Successor  Corporation  Common Stock shall send or cause to be sent a notice
and  transmittal  form  to  each  record  holder  of a  certificate  theretofore
evidencing shares of the Suburban Bancshares Common Stock.

          (c) All shares of Successor Corporation Common Stock into which shares
of Suburban Bancshares Common Stock shall have been converted shall be deemed to
have been issued in full satisfaction of all rights pertaining to such shares of
Suburban Bancshares Common Stock.



                                       46
<PAGE>

          9.4. Stock Options.  (a) At the Effective Date, all options granted by
Suburban   Bancshares  which  are  outstanding  under  all  Stock  Option  Plans
previously  adopted  by  Suburban  Bancshares  to  purchase  shares of  Suburban
Bancshares Common Stock, which are outstanding and unexercised immediately prior
thereto (each,  an  "Outstanding  Option"),  shall be converted as to each whole
share  subject to such  Outstanding  Option into an option  (each,  an "Exchange
Option") to purchase a number of shares of  Successor  Corporation  Common Stock
equal to the number of shares of Suburban  Bancshares  Common  Stock which could
have been purchased  under the Outstanding  Option  multiplied by the Conversion
Ratio,  with the total for each holder's  Exchange  Options with the same option
price and expiration date rounded down to the next whole share.

          (b) The per share  exercise  price of each  Exchange  Option  shall be
equal to the price per share set forth in the Outstanding  Option divided by the
Conversion Ratio, rounded up to the nearest whole cent.

          (c) The Exchange  Option shall  otherwise  have the same  duration and
other terms as the Outstanding Option.

          (d) The adjustments  provided herein with respect to any options which
are  "incentive  stock options" (as defined in Section 422 of the Code) shall be
effected in a manner consistent with Section 424(a) of the Code.

          9.5.  Charter of the  Successor  Corporation.  The Charter of Columbia
Bancorp,  as in effect  immediately  prior to the Effective  Date,  shall be the
Charter of the Successor  Corporation  until  thereafter  amended as provided by
law.

          9.6.  By-Laws of the  Successor  Corporation.  The By-Laws of Columbia
Bancorp,  as in  effect  immediately  prior  to the  Effective  Date  (with  the
amendments  set forth in Appendix  XII),  shall be the By-Laws of the  Successor
Corporation until thereafter amended as provided by law.

          9.7.  Anti-Dilution  Provision.  If Columbia  Bancorp takes any action
which establishes,  prior to the Effective Date, a record date or effective date
for a stock dividend on its Common Stock, a split or reverse split of its Common
Stock or any  distribution  on all  shares of its Common  Stock  other than cash
dividends, Columbia Bancorp will take such action as shall be necessary in order
that each share of Common Stock of Suburban  Bancshares  will be converted  into
the same number of shares of the Common Stock of Successor  Corporation (whether
such number is greater or less than the number  otherwise  provided  for herein)
that the owner of such shares would have owned immediately after the record date
or effective  date of such event had the  Effective  Date  occurred  immediately
before such record date or effective date, and the Conversion Ratio set forth in
Section 9.2 shall be adjusted accordingly.  Suburban Bancshares hereby agrees to
any revision in the exchange ratio pursuant to this Section 9.7.



                                       47
<PAGE>

          9.8.  Restriction  on Issuance or  Repurchase  of  Securities.  Except
transactions that would preclude the issuance of the pooling-of-interest  letter
under  Section  7.10,  nothing  in this Plan shall  limit the right of  Columbia
Bancorp to amend its Charter and By-Laws and to issue or  repurchase  any of its
stock or other securities in any manner and for any  consideration  permitted by
law either in connection with acquisitions of new affiliates or otherwise, prior
to or after the Effective Date.

     10. Terms of the Bank Merger.

          10.1.  Structure of the Bank Merger. At the Effective Date, subject to
the terms and  conditions  of this Plan,  Suburban Bank will merge with and into
Columbia  Bank, the separate  corporate  existence of Suburban Bank shall cease,
and Columbia  Bank shall  continue as the  successor  banking  institution  (the
"Successor Bank"). From and after the Effective Date, the Bank Merger shall have
the effects set forth in MD. FIN. INS. CODE SS. 3-712.

          10.2.  Conversion of Stock;  Conversion  Ratio. On the Effective Date,
each share of the Suburban Bank Common Stock  outstanding  immediately  prior to
the Effective Date, shall, without any action on the part of the holder thereof,
be canceled.

          10.3. Exchange Procedure.  (a) After the Effective Date,  certificates
representing  such shares of Common Stock of Suburban  Bank shall  represent the
right to receive  certificates  representing shares of Common Stock of Successor
Bank determined in accordance with Section 10.2; such Suburban Bank certificates
at any time after the  Effective  Date may be exchanged by Columbia  Bancorp for
new  certificates  for the  appropriate  number of  shares  of  Common  Stock of
Successor Bank.

          (b) All shares of  Successor  Bank Common  Stock into which  shares of
Suburban  Bank Common  Stock shall have been  converted  shall be deemed to have
been  issued in full  satisfaction  of all rights  pertaining  to such shares of
Suburban Bank Common Stock.

          10.4.  Charter of the Successor Bank. The Charter of Columbia Bank, as
in effect  immediately  prior to the Effective Date, shall be the Charter of the
Successor Bank until thereafter amended as provided by law.

          10.5.  By-Laws of the Sucessor  Bank. The By-Laws of Columbia Bank, as
in effect immediately prior to the Effective Date (with the amendments set forth
in Appendix XIII),  shall be the By-Laws of the Successor Bank until  thereafter
amended as provided by law.

          10.6. Restriction on Issuance or Repurchase of Securities.  Nothing in
this Plan  shall  limit  the right of  Columbia  Bank to amend its  Charter  and
By-Laws and to issue or repurchase  any of its stock or other  securities in any
manner and for any  consideration  permitted  by law either in  connection  with
acquisitions  of new  affiliates or  otherwise,  prior to or after the Effective
Date.



                                       48
<PAGE>

     11. Boards of Directors and Employment Matters.  Upon the Effective Date or
as otherwise indicated:

               (a) At Effective  Date,  the Board of Directors of Successor
     Corporation will be increased by five members. All of the directors of
     Columbia  Bancorp  immediately  prior  to  the  Effective  Date  shall
     continue as  directors of Successor  Corporation  after the  Effective
     Date,  and five of the  directors  of Suburban  Bancshares  before the
     Effective Date will become directors of Successor Corporation as shown
     on Appendix XIV.

               (b) At Effective  Date,  the Board of Directors of Successor
     Bank  will be  increased  by five  members.  All of the  directors  of
     Columbia Bank  immediately  prior to the Effective Date shall continue
     as directors of Successor  Bank after the Effective  Date, and five of
     the directors of Suburban  Bank before the Effective  Date will become
     directors of Successor Bank as shown on Appendix XIII.

               (c) The members the Boards of Directors  having board titles
     and the persons serving as executive officers of Successor Corporation
     and Successor  Bank at the Effective  Date are listed on Appendix XIV.
     The  employment of all officers and employees of Suburban  Bancshares,
     other than the officer with an  employment  agreement  from  Successor
     Corporation  and  listed  on  Appendix  XIV  (the  "Bancorp   Contract
     Employee"),  will terminate  without  compensation  or benefits of any
     kind or form  immediately  prior to the Effective  Date, and none will
     become officers or employees of Successor Corporation except as listed
     on Appendix XIV. The chief executive officer/board  chairman's service
     agreement of the Bancorp Contract Employee will terminate  immediately
     prior to the Effective Date without payment or benefits of any kind or
     form, and the Bancorp Contract  Employee will be offered an employment
     agreement with Successor  Corporation in the form attached as Appendix
     IX.

               (d) The officers and employees of Suburban Bank,  other than
     the officers and employees with an employment agreement from Successor
     Bank and listed on Appendix XIV (the "Bank Contract Employees"),  will
     continue  as  officers  and  employees  of  Successor  Bank as at-will
     employees. The severance agreements of officers listed on Appendix XIV
     will be assumed by Successor Bank, and the other officers or employees
     of Suburban  Bank (other than the Bank  Contract  Employees)  becoming
     officers or employees of Successor Bank upon termination of employment
     by  Successor  Bank  within  four  months of the  Effective  Date will
     receive a severance  payment  equal to one week's pay  (rounded to the
     nearest  one-tenth of a week) for each year's  service  with  Suburban
     Bank (with a minimum  payment of four weeks' pay and a maximum payment
     of 12  weeks'  pay).  The  chief  executive  officer/board  chairman's


                                       49
<PAGE>

     service  agreement and the  employment  agreement of the Bank Contract
     Employees  (whether  with Suburban  Bancshares or Suburban  Bank) will
     terminate  immediately  prior to the Effective Date without payment or
     benefits of any kind or form, and the Bank Contract  Employees will be
     offered  employment  agreements  with the Successor  Bank in the forms
     attached as Appendix XV and Appendix XVI.

               (e)  Successor  Corporation  will  provide the  employees of
     Suburban  Bank who continue as at-will  employees  of  Successor  Bank
     after the Effective Date with benefits under  Successor  Corporation's
     employee  benefit plans to the extent they are eligible to do so under
     the terms of such plans or programs  as are in force on the  Effective
     Date, with credit given for their prior service with Suburban Bank for
     purposes of allocation,  eligibility, and vesting. In that connection,
     Successor Corporation may, in its sole discretion, freeze or terminate
     the employee benefit plans of Suburban Bancshares, merge them with one
     or more employee benefit plans of Successor  Corporation,  or continue
     to maintain them.

     12.  Amendment of this Plan.  This Plan may be amended at any time prior to
the  Effective  Date  in  response  to  comments  of   governmental   regulatory
authorities,  or otherwise;  provided, that any such amendment is in writing and
is approved by the Board of Directors of each of the parties hereto.

     13.  Abandonment  of this  Plan;  Effect  Thereof.  Anything  herein to the
contrary notwithstanding,  and notwithstanding any stockholder vote or approval,
this Plan may be terminated and abandoned:

               (a) by mutual consent of the Boards of Directors of Suburban
     Bancshares and Columbia Bancorp;

               (b) by Columbia Bancorp or Suburban Bancshares, if its Board
     of  Directors  so  determines,  in the  event  of the  failure  of the
     stockholders  of  Columbia  Bancorp or the  stockholders  of  Suburban
     Bancshares  to approve  this Plan at the  meetings  called to consider
     such  approval,  unless in each case the  failure  of such  occurrence
     shall be due to the  failure of the party  seeking to  terminate  this
     Plan to  perform  or  observe  its  agreement  set forth  herein to be
     performed or observed by such party at or before the Effective Date;

               (c) by Columbia Bancorp or Suburban Bancshares, if its Board
     of Directors so determines,  in the event of a material  breach by the
     other  party  hereto of any  representation,  warranty,  covenant,  or
     agreement contained herein which is not cured or not curable within 60
     days  after  written  notice  of such  breach  is given  to the  party
     committing such breach by the other party;

               (d) by  Columbia  Bancorp  by  written  notice  to  Suburban
     Bancshares  if prior to June 30, 2000 (i) any  approval,  consent,  or


                                       50
<PAGE>

     waiver of any Governmental  Entity required to permit  consummation of
     the transactions  contemplated hereby shall have been denied, (ii) any
     approval,  consent,  or waiver of any Governmental  Entity required to
     permit  consummation  of the  transactions  contemplated  hereby shall
     include  any  condition  or  requirement  that  would (i)  result in a
     materially adverse effect on Columbia Bancorp or Suburban  Bancshares,
     or (ii) so materially  and  adversely  affect the economic or business
     benefits of the Mergers that Columbia Bancorp, in the sole judgment of
     Columbia  Bancorp,  would  not have  entered  into  this Plan had such
     conditions or  requirements  been known at the date hereof,  (iii) any
     action or proceeding  against  Columbia Bancorp or any of the Columbia
     Subsidiaries  or against  Suburban  Bancshares  or any of the Suburban
     Subsidiaries  shall be pending which seeks to prevent  consummation of
     the  transactions  contemplated  by this Plan, or (iv) any court shall
     have entered an order which prohibits  consummation of the Mergers and
     the transactions contemplated by this Plan;

               (e) by Columbia Bancorp or Suburban Bancshares, by action of
     the Board of  Directors  of either  party and the  delivery of written
     notice by either party to the other, in the event that the Mergers are
     not consummated by June 30, 2000,  unless the failure to so consummate
     by such  time is due to the  breach of any  representation,  warranty,
     agreement,  or covenant contained in this Plan by the party seeking to
     terminate,  or if prior to June 30, 2000, any  Governmental  Entity of
     competent  jurisdiction shall have issued a final,  unappealable order
     or ruling  enjoining  or  otherwise  prohibiting  consummation  of the
     transactions contemplated by this Plan;

               (f)  by  action  of  the  Board  of  Directors  of  Suburban
     Bancshares in their sole  discretion if they  determine to negotiate a
     Suburban Acquisition Proposal under Section 5.9;

               (g) by action of the Board of Directors of Columbia  Bancorp
     in their sole  discretion  if they  determine  to negotiate a Columbia
     Acquisition Proposal under Section 6.10; or

               (h) by Columbia Bancorp or Suburban Bancshares, by action of
     the Board of Directors of either  party in their sole  discretion  and
     the delivery of written  notice by either party to the other within 10
     business days of the date hereof,  in the event that Columbia  Bancorp
     or Suburban Bancshares,  as the case may be, is not satisfied with the
     results of its review of the loan and related files and reports of the
     other (as to which full access will be given  under  Sections  5.1 and
     6.1).

Except as provided in Section 17, in the event of the  termination  of this Plan
by either Columbia Bancorp or Suburban Bancshares,  as provided above, this Plan
shall thereafter become void, and there shall be no liability on the part of any


                                       51
<PAGE>

party hereto or their  respective  officers or  directors,  except that any such
termination shall be without prejudice to the rights of any party hereto arising
out of the  willful  breach  of any  other  party  of any  covenant  or  willful
misrepresentation contained in this Plan.

     14. Expenses.  Whether or not the  transactions  hereunder are consummated,
each party to the Plan shall pay its own  expenses  relating  hereto,  including
fees and  disbursements  of its counsel and  accountants  and one half of filing
fees in respect of bank regulatory approvals required in order to consummate the
Mergers; provided, however, that Columbia Bancorp shall pay (a) the registration
fee of the SEC,  filing  fees in respect of state  "blue sky" laws,  and the fee
payable to The National  Association of Securities  Dealers,  Inc. in respect of
the  listing  on NASDAQ of the shares of  Columbia  Bancorp  Common  Stock to be
issued  pursuant  to this Plan,  and (b) the costs of  printing  and mailing the
Proxy Statement/Prospectus. The foregoing shall not be construed as a limitation
of damages in the event of breach.

     15. Notices. All notices, requests, demands, and other communications under
or connected with this Plan shall be in writing, and (a) if to Columbia Bancorp,
shall be addressed to Columbia Bancorp,  9171 Baltimore National Pike,  Ellicott
City,  Maryland  21042,  attention  of John M. Bond,  Jr.,  President  and Chief
Executive Officer, with a copy to its counsel,  Piper & Marbury L.L.P., 36 South
Charles Street, Baltimore, Maryland 21201-3010, attention of James J. Winn, Jr.,
Esquire;  or (b) if to  Suburban  Bancshares,  shall be  addressed  to  Suburban
Bancshares,  Inc.,  7505  Greenway  Center  Drive,  Greenbelt,  Maryland  20768,
attention of Winfield M. Kelly,  Jr.,  Chairman of the Board and Chief Executive
Officer, with a copy to its counsel,  McNamee, Hosea, Jernigan & Kim, P.A., 6411
Ivy Lane, Suite 200, Greenbelt,  Maryland 20770,  attention of Stephen C. Hosea,
Esquire. Any such notices, requests,  demands, and other communications shall be
mailed,  postage prepaid, first class mail, or delivered personally and shall be
sufficient  and  effective  when  delivered  to or  received  at the  address as
specified.  Each of the parties may change the address at which it is to receive
communications by like written notice to the other.

     16. Entire Agreement;  Effect.  Subject to Sections 5.1(b) and 6.1(b), this
Plan  (including  the  financial  statements,  lists,  schedules,  and documents
delivered  pursuant  hereto,  which are made a part  hereof) is  intended by the
parties to and does constitute the entire  agreement of the parties with respect
to the  transaction  contemplated  hereunder.  This Plan  supersedes any and all
prior  understandings,  including  prior  letters of  intent,  and it may not be
changed,  waived,  discharged,  or terminated  orally,  but only in writing by a
party against which enforcement of the change, waiver, discharge, or termination
is sought.

     17.  Representations,  Warranties,  and Agreements.  Except as set forth in
this Section 17, all  representations,  warranties,  and  agreements of Columbia
Bancorp  and  Suburban  Bancshares  made  in  this  Plan,  or in any  instrument
delivered  by  Columbia  Bancorp or Suburban  Bancshares  pursuant to this Plan,
shall expire at the  Effective  Date.  In the event of the  consummation  of the
transactions  contemplated hereby, the agreements contained in or referred to in
Sections 9, 10, and 11 shall  survive the  Effective  Date.  In the event of the
termination of this Plan in accordance with its terms, the agreements  contained
in or referred to in Sections 5.1(b),  5.5, 5.9, 6.1(b),  6.5(b),  6.10, and 14,


                                       52
<PAGE>

the Stock  Option  Agreements,  and the  Support  Agreements  (which  shall only
terminate  in  accordance  with  their  respective  terms)  shall  survive  such
termination.  Except  to  the  extent  that  representations,   warranties,  and
agreements of Columbia Bancorp and Suburban  Bancshares made in this Plan, or in
any instrument  delivered by Columbia Bancorp or Suburban Bancshares pursuant to
this Plan, shall expire at the Effective Date, nothing contained herein shall be
construed to limit the liability of a party to another party for damages  caused
by a breach of this Plan.

     18. Governing Law. This Plan shall be governed by, and shall be interpreted
in  accordance  with,  the  laws of the  State of  Maryland  or,  to the  extent
applicable,  the federal laws of the United States of America or the laws of the
State of Delaware.

     19. General.  The section headings contained in this Plan are for reference
purposes only and shall not affect in any way the meaning or  interpretations of
this Plan. This Plan may be executed simultaneously in two or more counterparts,
each of which  shall be  deemed an  original,  but all of which  together  shall
constitute one and the same instrument.  This Plan shall inure to the benefit of
and be binding upon the parties hereto and their respective successors but shall
not be assigned to and shall not create any rights in favor of any other  party.
Any purported assignment in violation of this Section 19 shall be void.

     IN WITNESS WHEREOF,  Columbia  Bancorp and Suburban  Bancshares have caused
this Plan to be duly executed by their  respective  chairmen or presidents,  and
their  respective  seals to be hereunto affixed and attested by their respective
secretaries, thereunto duly authorized as of the date first above written.


ATTEST:      [SEAL]                     COLUMBIA BANCORP



- ---------------------------             By:-------------------------------------
John A. Scaldara, Jr.                      John M. Bond, Jr.
Secretary                                  President and Chief Executive Officer


ATTEST:      [SEAL]                        SUBURBAN BANCSHARES, INC.


- ---------------------------             By:-------------------------------------
                                           Winfield M. Kelly, Jr.
Secretary                                  Chairman of the Board
                                           and Chief Executive Officer


                                       53
<PAGE>
                                                                      APPENDIX I

                                LIST OF SCHEDULES


A.   Schedules to be Provided by Suburban Bancshares to Columbia Bancorp.

Schedule 3.1(a).     List  of  subsidiaries  of  Suburban  Bancshares  and their
                     places of incorporation.

Schedule 3.1(b).     Ownership of Suburban  Subsidiaries,  Joint  Ventures,  and
                     Partnerships.

Schedule 3.1(c).     Charters  and By-Laws of  Suburban  Bancshares  and each of
                     the Suburban Subsidiaries.

Schedule 3.1(d).     List of  outstanding  options, warrants, rights, restricted
                     stock  or  obligations of  any  kind  entitling  the holder
                     thereof to  acquire shares of the Common Stock of  Suburban
                     Bancshares  or  outstanding securities  or instruments that
                     are convertible into shares of the Common Stock of Suburban
                     Bancshares.

Schedule 3.2.        Consolidated  Financial Statements  of Suburban  Bancshares
                     and the  Suburban Subsidiaries at  December 31, 1994, 1995,
                     1996, 1997,  and  1998  and  for  each  of  the  years then
                     ended, as reported  upon by Stegman & Company, and  at June
                     30,  1998  and 1999  and for  each of the six month periods
                     then ended.

Schedule 3.3.        Tax  Returns  of  Suburban  Bancshares  to  Federal, State,
                     County,  Municipal, or Foreign  Taxing  Authorities for the
                     taxable years  Decembet 31,  1994, 1995,  1996,  1997, and
                     1998.

Schedule 3.5.        Increase of  Salaries  or Benefits  to Directors, Officers,
                     or Employees since December 31, 1998.

Schedule 3.7.        List of Liens and Encumbrances on Property, Etc.

Schedule 3.8.        Plans, Contracts, and Agreements.

Schedule 3.9.        Litigation, Etc.

Schedule 3.10.       Environmental Matters.

Schedule 3.12.       Pension and Welfare Matters.

Schedule 3.13.       Related Party Transactions.



                                       54
<PAGE>

Schedule 3.14.       No Conflicts with Other Documents.

Schedule 3.17.       Insurance Policies, including Financial Institutions Bonds.

Schedule 3.19.       Agreement   between   Suburban   Bancshares  and  Danielson
                     Associates Inc.

Schedule 3.21.       Year 2000.

Schedule 5.4(e).     Increases in Employee Compensation or Benefit Levels.

Schedule 5.4(z)(ii). Capital Expenditures In Excess of $25,000.

Schedule 5.9.        Schedule  of  Suburban   Bancshares'  loans  classified  as
                     substandard,  doubtful,  or loss;  and  real  estate owned;
                     Suburban Bancshares' Allowance for Possible Losses.


B.   Schedules to be Provided by Columbia Bancorp to Suburban Bancshares.

Schedule 4.1(a).     List of subsidiaries of Columbia Bancorp.

Schedule 4.1(b).     Joint  Ventures or  Partnerships  Not  Wholly Owned  by its
                     Parent Corporation

Schedule 4.1(c).     Charters and By-Laws of Columbia Bancorp, Columbia Bank.

Schedule 4.1(d).     List of outstanding options,  warrants, rights,  restricted
                     stock,  or  obligations of any  kind  entitling  the holder
                     thereof to acquire shares of  the Common Stock of  Columbia
                     Bancorp  or outstanding securities or instruments that  are
                     convertible  into  shares  of the  Common Stock of Columbia
                     Bancorp.

Schedule 4.2.        Consolidated  Financial Statements of Columbia  Bancorp and
                     the Columbia Subsidiaries at December 31, 1994, 1995, 1996,
                     1997, and 1998 and for each  of the  years  then ended,  as
                     reported  upon by KPMG  LLP,  and at June 30, 1998 and 1999
                     and for each of the six month periods then ended.

Schedule 4.3.        Tax Returns of Columbia  Bancorp to Federal, State, County,
                     Municipal, or Foreign Taxing  Authorities  for the  taxable
                     years December 31, 1994, 1995, 1996, 1997, and 1998.

Schedule 4.5.        Increase of Salaries or Benefits to Directors, Officers, or
                     Employees since December 31, 1998.

Schedule 4.7.        List of Liens and Encumbrances on Property, Etc.



                                       55
<PAGE>

Schedule 4.8.        Plans, Contracts, and Agreements.

Schedule 4.9.        Litigation, Etc.

Schedule 4.10.       Environmental Matters.

Schedule 4.12.       Pension and Welfare Matters.

Schedule 4.13.       Related Party Transactions.

Schedule 4.14.       No Conflicts with Other Documents.

Schedule 4.17.       Insurance Policies, including Financial Institutions Bonds.

Schedule 4.19.       Agreement  between  Columbia Bancorp  and  Austin Financial
                     Services, Inc.

Schedule 4.21.       Year 2000.

Schedule 6.4(e).     Increases in Employee Compensation or Benefit Levels.

Schedule 6.4(z)(ii). Capital Expenditures In Excess of $25,000.

Schedule 6.10.       Schedule  of  Columbia   Bancorp's   loans   classified  as
                     substandard,  doubtful,  or loss; and    real estate owned;
                     Columbia Bancorp's Allowance for Possible Losses.




                                       56
<PAGE>

                                                                     APPENDIX II

                        AGREEMENT AND ARTICLES OF MERGER

                                     BETWEEN

                                COLUMBIA BANCORP
                            (a Maryland Corporation)

                                       AND

                            SUBURBAN BANCSHARES, INC.
                            (a Delaware Corporation)



     COLUMBIA BANCORP,  a corporation duly organized and existing under the laws
of the State of Maryland ("Columbia Bancorp") and SUBURBAN  BANCSHARES,  INC., a
corporation  duly organized and existing under the laws of the State of Delaware
("Suburban Bancshares"), do hereby certify that:

     FIRST: Columbia Bancorp and Suburban Bancshares agree to merge.

     SECOND: The name and place of incorporation of each party to this Agreement
and  Articles  of Merger  are  Columbia  Bancorp,  a Maryland  corporation,  and
Suburban  Bancshares,  Inc.,  a Delaware  corporation.  Columbia  Bancorp  shall
survive the merger and shall  continue  under the name  "Columbia  Bancorp" as a
corporation of the State of Maryland.

     THIRD: The date of incorporation of Suburban Bancshares was March 26, 1985.
Suburban  Bancshares is incorporated under the Delaware General Corporation Law.
Suburban  Bancshares  was  registered or qualified to do business in Maryland on
May 2, 1993.

     FOURTH:  Columbia  Bancorp  has its  principal  office  in  Howard  County,
Maryland.  Suburban  Bancshares  has its principal  office in Maryland in Prince
George's  County  and  owns  an  interest  in land in  Prince  George's  County,
___________ County, and _________ County, Maryland.

     FIFTH:  The  terms and  conditions  of the  transaction  set forth in these
Articles were advised,  authorized,  and approved by each  corporation  party to
this  Agreement and Articles of Merger in the manner and by the vote required by
its  Charter  and the laws of the  state of its  incorporation.  The  manner  of
approval was as follows:

               (a) The Boards of Directors of Columbia Bancorp and Suburban
     Bancshares at meetings duly held on September 27, 1999,  and September
     27,  1999,  respectively,  adopted a  resolution  which  approved  the


                                    57
<PAGE>

     Agreement and Articles of Merger,  declared  that the proposed  merger
     was advisable on  substantially  the terms and conditions set forth or
     referred to in the resolution and directed that the proposed merger be
     submitted for consideration at special meetings of the stockholders of
     the respective parties.

               (b) Notice which stated that a purpose of the  stockholders'
     meeting  was to act on the  proposed  merger  was  given  by  Columbia
     Bancorp and Suburban Bancshares as required by law.

               (c) The proposed merger was approved by the  stockholders of
     each of Columbia  Bancorp and Suburban  Bancshares at special meetings
     of  stockholders  held  ___________,   1999  and  ___________,   1999,
     respectively,  by the affirmative  vote of two-thirds of all the votes
     entitled to be cast on the matter.

     SIXTH: No amendment to the Charter of Columbia Bancorp is to be effected as
a part of the merger.

     SEVENTH:  The total number of shares of stock of all classes which Columbia
Bancorp has authority to issue is  10,000,000  shares of Common Stock (par value
$.01 per  share).  The  aggregate  par  value of all the  shares of stock of all
classes of Columbia Bancorp is $100,000.  The total number of shares of stock of
all classes  which  Suburban  Bancshares  has  authority to issue is  21,000,000
shares, of which 1,000,000 shares are Preferred Stock (par value $.01 per share)
and 20,000,000 shares are Common Stock (par value $.01 per share). The aggregate
par value of all the shares of stock of all  classes of Suburban  Bancshares  is
$210,000.

     EIGHTH:  The merger  does not  increase  the  authorized  stock of Columbia
Bancorp.

     NINTH:  The terms and  conditions  of the merger,  the mode of carrying the
same into effect and the manner and basis of converting or exchanging  shares of
Common  Stock of Suburban  Bancshares  into  shares of Common  Stock of Columbia
Bancorp are as follows:

               (a) Each  issued and  outstanding  share of Common  Stock of
     Columbia  Bancorp on the effective date of the merger shall  continue,
     without change,  to be an issued and outstanding share of Common Stock
     of Columbia Bancorp.

               (b) Each  issued and  outstanding  share of Common  Stock of
     Suburban  Bancshares on the effective  date of the merger,  shall upon
     effectiveness  and without  further  act, be  automatically  converted
     into, and become ________ shares of Common Stock of Columbia  Bancorp.
     Cash will be paid in lieu of fractional  shares at the rate of $______
     per share. There will be no issued and outstanding shares of Preferred
     Stock of Suburban Bancshares on the effective date of the merger.

               (c) After the  effective  date of the  merger,  certificates
     representing  shares  of Common  Stock of  Suburban  Bancshares  shall


                                    58
<PAGE>

     represent  the right to receive  certificates  representing  shares of
     Common   Stock  of  Columbia   Bancorp;   such   Suburban   Bancshares
     certificates at any time after the effective date of the merger may be
     exchanged  by  the  holders  thereof  for  new  certificates  for  the
     appropriate  number of shares of Common  Stock of Columbia  Bancorp by
     forwarding such Suburban  Bancshares Common Stock certificates and the
     letter of  transmittal  provided by Columbia  Bancorp to the  transfer
     agent for Columbia  Bancorp  Common Stock,  and the payment of cash in
     lieu of fractions,  dividends,  and other  distributions on said stock
     may  be  withheld  until  the  Suburban  Bancshares  certificates  are
     surrendered  for exchange to the transfer  agent for Columbia  Bancorp
     Common Stock; and when such new  certificates are issued,  the holders
     thereof shall be entitled to be paid the amount  (without any interest
     thereon) of all such withheld cash in lieu of fractions, dividends, or
     other distributions which have theretofore become payable with respect
     to such shares of Common Stock of Columbia Bancorp.

     TENTH:  The merger  shall  become  effective at _____ _.m. EST on ________,
_____.

     ELEVENTH:  Columbia  Bancorp  agrees that it may be served with  process in
Delaware  in any  proceeding  for  enforcement  of any  obligation  of  Suburban
Bancshares,  as well as for  enforcement of any  obligation of Columbia  Bancorp
arising from the merger,  including any suit or other  proceeding to enforce the
right of any stockholder as determined in appraisal  proceedings pursuant to the
provisions  of  section  262 of  Title  8 of the  Delaware  Code  of  1953,  and
irrevocably  appoints  the  Secretary  of State of the State of  Delaware as its
agent to accept  service of process in any such suit or other  proceedings.  The
address  to which a copy of such  process  shall be mailed by the  Secretary  of
State of the State of Delaware is 9171 Baltimore  National Pike,  Ellicott City,
Maryland  21042,  Attention  John M. Bond,  Jr.,  President and Chief  Executive
Officer.



                                       59
<PAGE>

     IN WITNESS  WHEREOF,  COLUMBIA BANCORP and SUBURBAN  BANCSHARES,  INC. have
caused this  Agreement  and Articles of Merger to be signed in their  respective
names  and on their  respective  behalves  by  their  respective  presidents  or
chairmen and  witnessed by their  respective  secretaries  on  ________________,
______.

ATTEST:      [SEAL]                     COLUMBIA BANCORP



- ---------------------------             By:-------------------------------------
John A. Scaldara, Jr.                      John M. Bond, Jr.
Secretary                                  President and Chief Executive Officer


ATTEST:      [SEAL]                        SUBURBAN BANCSHARES, INC.


- ---------------------------             By:-------------------------------------
                                           Winfield M. Kelly, Jr.
Secretary                                  Chairman of the Board
                                           and Chief Executive Officer


                                       60
<PAGE>



     THE UNDERSIGNED, President and Chief Executive Officer of COLUMBIA BANCORP,
a Maryland corporation,  who executed on behalf of the Corporation the foregoing
Agreement  and  Articles  of Merger of which  this  certificate  is made a part,
hereby  acknowledges in the name and on behalf of said Corporation the foregoing
Agreement and Articles of Merger to be the corporate act of said Corporation and
hereby  certifies that to the best of his knowledge,  information and belief the
matters  and facts set forth  therein  with  respect  to the  authorization  and
approval  thereof  are true in all  material  respects  under the  penalties  of
perjury.



                                           -------------------------------------
                                           John M. Bond, Jr.
                                           President and Chief Executive Officer


     THE  UNDERSIGNED,  Chairman  of the Board and Chief  Executive  Officer  of
SUBURBAN BANCSHARES, INC., a Delaware corporation, who executed on behalf of the
Corporation  the  foregoing  Agreement  and  Articles  of Merger  of which  this
certificate  is made a part,  hereby  acknowledges  in the name and on behalf of
said  Corporation  the  foregoing  Agreement  and  Articles  of Merger to be the
corporate act of said  Corporation and hereby  certifies that to the best of his
knowledge,  information  and belief the matters and facts set forth therein with
respect to the  authorization  and  approval  thereof  are true in all  material
respects under the penalties of perjury.



                                           -------------------------------------
                                           Winfield M. Kelly, Jr.
                                           Chairman of the Board
                                           and Chief Executive Officer



     THE  UNDERSIGNED,  Secretary  of  SUBURBAN  BANCSHARES,  INC.,  a  Delaware
corporation,  hereby  certifies that,  pursuant to the  requirements of Sections
251(c) and 252(c) of the  Delaware  General  Corporation  Law, a majority of the
outstanding  stock of Suburban  Bancshares,  Inc.  entitled to vote voted in the
affirmative for the adoption of the Agreement and Articles of Merger.



                                           -------------------------------------

                                           Secretary

                                       61
<PAGE>


                            AGREEMENT OF BANK MERGER

                                     BETWEEN

                                THE COLUMBIA BANK
                           (a Maryland Trust Company)

                                       AND

                            SUBURBAN BANK OF MARYLAND
                           (a Maryland Trust Company)



     AGREEMENT OF BANK MERGER made by and between THE COLUMBIA  BANK, a Maryland
trust company ("Columbia Bank") and SUBURBAN BANK OF MARYLAND,  a Maryland trust
company ("Suburban Bank"), do hereby certify that:

     1. The Bank Merger. As of the effective date hereof, Suburban Bank shall be
merged  into  Columbia  Bank  under the  Charter  of  Columbia  Bank (the  "Bank
Merger"),  and Columbia Bank shall be the resulting trust company under the name
"The  Columbia  Bank".  The By-Laws of Columbia Bank shall be the By-Laws of the
resulting trust company.  The directors of Columbia Bank at the time of the Bank
Merger  (together  with the  following  five  directors of Suburban  Bank) shall
become the  directors of the resulting  trust company  following the Bank Merger
(Winfield  M. Kelly,  Jr.,  Albert W.  Turner,  Kenneth H.  Michael,  Vincent D.
Palumbo, and Lawrence A. Shulman).

     2. Location of Principal Banking Offices.

               (a) The principal banking office of Columbia Bank is located
     at 10480 Little Patuxent Parkway, Columbia, Maryland 21044.

               (b) The principal banking office of Suburban Bank is located
     at 7505 Greenway Center Drive, Greenbelt, Maryland 20768.

     3. The Resulting Trust Company.

               (a) The  principal  banking  office of the  resulting  trust
     company will be located at 10480 Little  Patuxent  Parkway,  Columbia,
     Maryland 21044.

               (b)  Upon  the  effective  date  of  the  Bank  Merger,  the
     authorized  capital stock of the resulting trust company shall consist
     of 270,000 shares of Common Stock, par value of $10.00 per share.



                                    62
<PAGE>

               (c) No  preferred  stock  shall be issued  by the  resulting
     trust company  pursuant to this  Agreement or in  connection  with the
     Bank Merger.

               (d) No  amendments  to the  Charter  or the  By-Laws  of the
     resulting trust company shall be made pursuant to this Agreement or in
     connection with the Bank Merger.

     4. Terms of the  Exchange.  The terms of the  exchange of shares of capital
stock of the constituent trust company and commercial bank shall be as follows:

               (a) Each  issued and  outstanding  share of Common  Stock of
     Columbia  Bank  immediately  prior to the  effective  date of the Bank
     Merger shall continue, without change, to be an issued and outstanding
     share of Common Stock of Columbia Bank.

               (b) Each  issued and  outstanding  share of Common  Stock of
     Suburban  Bank  immediately  prior to the  effective  date of the Bank
     Merger,   shall  upon   effectiveness  and  without  further  act,  be
     automatically cancelled.

               (c)  There  will be no  issued  and  outstanding  shares  of
     Preferred  Stock of Suburban  Bank on the  effective  date of the Bank
     Merger.

     5. Approval of the Agreement. This Agreement has been declared advisable by
the  respective  Boards of Directors of each of Columbia  Bank and Suburban Bank
and is  subject  to the  approval  of the  Maryland  Commissioner  of  Financial
Institutions;   Columbia  Bancorp,  the  sole  stockholder  of  the  issued  and
outstanding capital stock of Columbia Bank; and Suburban  Bancshares,  Inc., the
sole stockholder of the issued and outstanding capital stock of Suburban Bank.

     6.  Effective  Date.  The Bank Merger shall become on the date specified by
the Maryland Commissioner of Financial Institutions in the Certificate of Merger
attached hereto.



                                       63
<PAGE>

     IN WITNESS  WHEREOF,  COLUMBIA  BANK and  SUBURBAN  BANK have  caused  this
Agreement  of Bank Merger to be duly  executed on their  respective  behalves by
their respective  proper officers and witnessed by their respective  secretaries
on ________________, ______.


ATTEST:      [SEAL]                     COLUMBIA BANCORP



- ---------------------------             By:-------------------------------------
John A. Scaldara, Jr.                      John M. Bond, Jr.
Secretary                                  President and Chief Executive Officer


ATTEST:      [SEAL]                        SUBURBAN BANCSHARES, INC.


- ---------------------------             By:-------------------------------------
                                           Winfield M. Kelly, Jr.
Secretary                                  Chairman of the Board


                                       64
<PAGE>

                              CERTIFICATE OF MERGER



     I,  the  undersigned  Mary  Louise  Preis,  the  Maryland  Commissioner  of
Financial  Institutions,  do hereby  certify that Suburban  Bank of Maryland,  a
trust  company  existing  under  the  laws of the  State of  Maryland,  with its
principal  office located in Greenbelt,  Maryland,  prior  approval  having been
given by the  Federal  Deposit  Insurance  Corporation,  has been  merged in The
Columbia Bank, a trust company existing under the laws of the State of Maryland,
with  its  principal  office  located  in  Columbia  Maryland,  the  name of the
resulting institution being The Columbia Bank and the merger shall be and become
effective as of __:__ _.m., _____________,_____, and I hereby give my formal and
complete approval to said Agreement of Bank Merger between these two constituent
institutions.

     WITNESS  my hand  and  official  seal  this  _____  day of  ______________,
_______.




                                            ------------------------------------
                                            Maryland Commissioner
                                            of Financial Institutions

                                       65
<PAGE>

                                                                    APPENDIX III

                         FORM OF STOCK OPTION AGREEMENT

     This STOCK OPTION AGREEMENT (this "Option Agreement") dated as of September
28, 1999, between SUBURBAN BANCSHARES, INC. ("Suburban Bancshares"),  a Delaware
corporation,  and COLUMBIA BANCORP ("Columbia Bancorp"), a Maryland corporation,
recites and provides:

     A. The Board of Directors of Suburban  Bancshares and Columbia Bancorp have
approved a Plan and  Agreement  to Merge dated  September  28, 1999 (the "Plan")
providing for the merger (the "Holding Company  Merger") of Suburban  Bancshares
with and into Columbia Bancorp.

     B. As a condition to and as consideration for Columbia Bancorp's entry into
the Plan and to induce such entry,  Suburban  Bancshares  has agreed to grant to
Columbia Bancorp the option set forth herein to purchase authorized but unissued
shares of Suburban Bancshares Common Stock.

     NOW, THEREFORE, the parties agree as follows:

     1. Definitions. Capitalized terms defined in the Plan and used herein shall
have the same meanings as in the Plan.

     2. Grant of Option.  Subject to the terms and  conditions set forth herein,
Suburban  Bancshares  hereby grants to Columbia Bancorp an option (the "Option")
to purchase up to  2,807,668  shares of Suburban  Bancshares  Common Stock at an
exercise  price of $2.313 per share  payable in cash as  provided  in Section 4;
provided,  however,  that in the event Suburban  Bancshares  issues or agrees to
issue any shares of Suburban  Bancshares  Common  Stock (other than as permitted
under the Plan) at a price less than $2.313 per share (as  adjusted  pursuant to
Section 6), the exercise price shall be such lesser price.

     3. Exercise of Option.  (a) Unless Columbia  Bancorp shall have breached in
any material  respect any covenant or  representation  contained in the Plan and
such breach has not been cured,  Columbia  Bancorp may exercise  the Option,  in
whole or part, at any time or from time to time if a Purchase  Event (as defined
below) shall have occurred and be continuing;  provided,  that to the extent the
Option shall not have been  exercised,  it shall  terminate and be of no further
force and effect  upon the  earliest to occur of (i) the  Effective  Date of the
Holding Company  Merger,  or (ii) the termination of the Plan in accordance with
the  provisions  thereof prior to the occurrence of a Purchase Event (other than
as a result of a willful breach by Suburban Bancshares of any Specified Covenant
or as a result of failure of Suburban  Bancshares'  stockholders  to approve the
Plan by the vote required under  applicable  law or under  Suburban  Bancshares'


                                       66
<PAGE>

Charter),  or (iii) 12  months  after  termination  of the Plan due to a willful
breach by Suburban  Bancshares of any Specified  Covenant or failure of Suburban
Bancshares'  stockholders  to  approve  the  Plan  by the  vote  required  under
applicable law or under Suburban Bancshares' Charter;  provided,  however,  that
any  purchase  of  shares  upon  exercise  of the  Option  shall be  subject  to
compliance with applicable law, including,  without limitation, the Bank Holding
Company Act of 1956, as amended.  Any exercise of the Option shall be subject to
compliance with applicable provisions of law.

     (b) As used  herein,  a "Purchase  Event"  shall mean any of the  following
events or transactions occurring after the date hereof:

               (i)  Suburban   Bancshares  or  Suburban  Bank  of  Maryland
     ("Suburban  Bank"),  without having received Columbia  Bancorp's prior
     written consent,  shall have entered into an agreement with any person
     (x) to merge or  consolidate,  or enter into any similar  transaction,
     except  as  contemplated  in the  Plan,  (y) to  purchase,  lease,  or
     otherwise  acquire all or substantially  all of the assets of Suburban
     Bancshares or Suburban  Bank, or (z) to purchase or otherwise  acquire
     (including by way of merger,  consolidation,  share  exchange,  or any
     similar transaction) securities representing 15% or more of the voting
     power of Suburban Bancshares or Suburban Bank;

               (ii) any person (other than Suburban  Bancshares or Suburban
     Bank in a fiduciary capacity,  or Columbia Bancorp or Columbia Bank in
     a fiduciary capacity) shall have acquired beneficial  ownership or the
     right  to  acquire  beneficial   ownership  of  15%  or  more  of  the
     outstanding shares of Suburban  Bancshares Common Stock after the date
     hereof (the term  "beneficial  ownership"  for purposes of this Option
     Agreement  having the meaning assigned thereto in Section 13(d) of the
     Securities   Exchange  Act  of  1934  (the  "Exchange  Act")  and  the
     regulations promulgated thereunder);

               (iii) any  person  shall have made a bona fide  proposal  to
     Suburban  Bancshares by public  announcement or written  communication
     that is or  becomes  the  subject  of  public  disclosure  to  acquire
     Suburban  Bancshares  or  Suburban  Bank  by  merger,   consolidation,
     purchase  of all or  substantially  all of its  assets,  or any  other
     similar  transaction,  and  following  such  bona  fide  proposal  the
     stockholders of Suburban Bancshares vote not to adopt the Plan; or

               (iv) Suburban  Bancshares shall have willfully  breached any
     Specified   Covenant  following  a  bona  fide  proposal  to  Suburban
     Bancshares or Suburban Bank to acquire Suburban Bancshares or Suburban
     Bank by merger, consolidation, purchase of all or substantially all of
     its assets,  or any other  similar  transaction,  which  breach  would
     entitle  Columbia Bancorp to terminate the Plan (without regard to the
     cure periods provided for therein) and such breach shall not have been
     cured prior to the Notice Date (as defined below).

If more than one of the transactions  giving rise to a Purchase Event under this
Section 3(b) is undertaken or effected,  then all such  transactions  shall give
rise only to one Purchase Event, which Purchase Event shall be deemed continuing


                                    67
<PAGE>

for all purposes hereunder until all such transactions are abandoned. As used in
this Option  Agreement,  "person" shall have the meanings  specified in Sections
3(a)(9) and 13(d)(3) of the Exchange Act.

     (c) In the event Columbia  Bancorp wishes to exercise the Option,  it shall
send to Suburban  Bancshares  a written  notice (the date of which being  herein
referred to as the "Notice  Date")  specifying (i) the total number of shares it
will purchase  pursuant to such exercise,  and (ii) a place and date not earlier
than three  business  days nor later than 60 business days after the Notice Date
for the  closing of such  purchase  ("Closing  Date");  provided,  that if prior
notification  to or  approval  of any  federal  or state  regulatory  agency  is
required in connection with such purchase,  Columbia Bancorp shall promptly file
the required notice or application for approval and shall expeditiously  process
the same and the  period  of time that  otherwise  would  run  pursuant  to this
sentence  shall run  instead  from the date on which any  required  notification
period has expired or been terminated or such approval has been obtained and any
requisite waiting period shall have passed.

     (d) As  used  herein,  "Specified  Covenant"  means  any  covenant  made by
Suburban Bancshares and contained in Section 5 of the Plan.

     4. Payment and Delivery of Certificates.  (a) At the closing referred to in
Section 3,  Columbia  Bancorp  shall pay to Suburban  Bancshares  the  aggregate
purchase  price for the shares of Suburban  Bancshares  Common  Stock  purchased
pursuant to the exercise of the Option in immediately  available funds by a wire
transfer to a bank account designated by Suburban Bancshares.

     (b) At such closing,  simultaneously with the delivery of funds as provided
in subsection  (a),  Suburban  Bancshares  shall  deliver to Columbia  Bancorp a
certificate  or  certificates  representing  the  number of  shares of  Suburban
Bancshares  Common Stock  purchased by Columbia  Bancorp,  and Columbia  Bancorp
shall deliver to Suburban  Bancshares a letter  agreeing  that Columbia  Bancorp
will not offer to sell or  otherwise  dispose  of such  shares in  violation  of
applicable law or the provisions of this Option Agreement.

     (c)  Certificates  for  Suburban  Bancshares  Common  Stock  delivered at a
closing  hereunder shall be endorsed with a restrictive  legend which shall read
substantially as follows:

     "THE TRANSFER OF THE SHARES REPRESENTED BY THIS CERTIFICATE IS SUBJECT
     TO  CERTAIN  PROVISIONS  OF  A  STOCK  OPTION  AGREEMENT  BETWEEN  THE
     REGISTERED  HOLDER  HEREOF AND SUBURBAN  BANCSHARES,  INC.  ("SUBURBAN
     BANCSHARES") AND TO RESALE  RESTRICTIONS  ARISING UNDER THE SECURITIES
     ACT OF 1933, AS AMENDED,  A COPY OF WHICH  AGREEMENT IS ON FILE AT THE
     PRINCIPAL OFFICE OF SUBURBAN BANCSHARES. A COPY OF SUCH AGREEMENT WILL
     BE  PROVIDED  TO THE HOLDER  HEREOF  WITHOUT  CHARGE  UPON  RECEIPT BY
     SUBURBAN BANCSHARES OF A WRITTEN REQUEST."



                                    68
<PAGE>

     It is  understood  and  agreed  that the above  legend  shall be removed by
delivery of substitute  certificate(s)  without such legend if Columbia  Bancorp
shall have delivered to Suburban Bancshares a copy of a letter from the staff of
the Securities and Exchange  Commission,  or an opinion of counsel,  in form and
substance satisfactory to Suburban Bancshares, to the effect that such legend is
not  required  for  purposes  of the  Securities  Act of 1933,  as amended  (the
"Securities Act").

     5. Representations. Suburban Bancshares represents, warrants, and covenants
to Columbia Bancorp as follows:

          (a)  Suburban  Bancshares  shall  at  all  times  maintain  sufficient
authorized but unissued shares of Suburban  Bancshares  Common Stock so that the
Option may be exercised  without  authorization of additional shares of Suburban
Bancshares Common Stock.

          (b) The shares to be issued upon due exercise, in whole or in part, of
the Option, when paid for as provided herein,  will be duly authorized,  validly
issued, fully paid, and nonassessable.

     6. Adjustment Upon Changes in Capitalization. In the event of any change in
Suburban  Bancshares  Common  Stock by  reason  of stock  dividends,  split-ups,
mergers, recapitalizations,  combinations, exchanges of shares, or the like, the
type and number of shares  subject to the  Option,  and the  purchase  price per
share,  as the case may be, shall be adjusted  appropriately.  In the event that
any  additional  shares  of  Suburban  Bancshares  Common  Stock  are  issued or
otherwise become outstanding after the date of this Option Agreement (other than
pursuant to this Option Agreement),  the number of shares of Suburban Bancshares
Common  Stock  subject  to the  Option  shall be  adjusted  so that,  after such
issuance,  it equals 19.9% of the number of shares of Suburban Bancshares Common
Stock then issued and outstanding without giving effect to any shares subject or
issued  pursuant to the Option.  Nothing  contained  in this  Section 6 shall be
deemed to authorize Suburban Bancshares to breach any provision of the Plan.

     7.  Registration  Rights.  If  requested  by  Columbia  Bancorp,   Suburban
Bancshares shall as expeditiously as possible file a registration statement on a
form of general use under the Securities Act if necessary in order to permit the
sale or other disposition of the shares of Suburban Bancshares Common Stock that
have been acquired  upon exercise of the Option in accordance  with the intended
method of sale or other  disposition  requested  by Columbia  Bancorp.  Columbia
Bancorp  shall  provide  all  information   reasonably   requested  by  Suburban
Bancshares for inclusion in any  registration  statement to be filed  hereunder.
Suburban  Bancshares  will  use its best  efforts  to  cause  such  registration
statement first to become effective and then to remain effective for such period
not in excess of 270 days from the day such registration statement first becomes
effective  as  may be  reasonably  necessary  to  effect  such  sales  or  other
dispositions.  Only one  registration  may be effected  under this  Section 7 at
Suburban   Bancshares'   expense,  and  which  shall  not  include  underwriting


                                       69
<PAGE>

commissions  and the  fees  and  disbursements  of  Columbia  Bancorp's  counsel
attributable to the registration of such Suburban  Bancshares  Common Stock. The
filing of any registration statement hereunder may be delayed for such period of
time as may  reasonably be required to  facilitate  any public  distribution  by
Suburban  Bancshares  of Suburban  Bancshares  Common  Stock.  If  requested  by
Columbia Bancorp, in connection with any such registration,  Suburban Bancshares
will become a party to any underwriting  agreement  relating to the sale of such
shares,   but  only  to  the   extent  of   obligating   itself  in  respect  of
representations,  warranties,  indemnities,  and  other  agreements  customarily
included in such  underwriting  agreements.  Upon  receiving  any  request  from
Columbia Bancorp or assignee  thereof under this Section 7, Suburban  Bancshares
agrees to send a copy thereof to Columbia  Bancorp and to any  assignee  thereof
known to Suburban Bancshares, in each case by promptly mailing the same, postage
prepaid,  to the  address of record of the  persons  entitled  to  receive  such
copies.

     8. Severability. If any term, provision, covenant, or restriction contained
in this  Option  Agreement  is held by a court or a federal or state  regulatory
agency of competent  jurisdiction  to be invalid,  void, or  unenforceable,  the
remainder of the terms, provisions, and covenants, and restrictions contained in
this Option Agreement shall remain in full force and effect, and shall in no way
be  affected,  impaired,  or  invalidated.  If for  any  reason  such  court  or
regulatory  agency  determines  that the  Option  will not  permit the holder to
acquire the full number of shares of Suburban  Bancshares  Common Stock provided
in Section 2 (as adjusted pursuant to Section 6), it is the express intention of
Suburban  Bancshares to allow the holder to acquire such lesser number of shares
as may be permissible, without any amendment or modification hereof.

     9. Miscellaneous.

          (a) Expenses. Except as otherwise provided herein, each of the parties
hereto shall bear and pay all costs and expenses incurred by it or on its behalf
in connection with the transactions  contemplated hereunder,  including fees and
expenses of its own financial consultants,  investment bankers, accountants, and
counsel.

          (b) Entire Agreement.  Except as otherwise  expressly provided herein,
this Option  Agreement  contains the entire  agreement  between the parties with
respect to the  transactions  contemplated  hereunder and  supersedes  all prior
arrangements or understandings with respect thereto,  written or oral. The terms
and  conditions  of this Option  Agreement  shall inure to the benefit of and be
binding upon the parties  hereto and their  respective  successors  and assigns.
Nothing in this Option  Agreement,  expressed or implied,  is intended to confer
upon any party, other than the parties hereto,  and their respective  successors
and assigns, any rights, remedies, obligations or liabilities under or by reason
of this Option Agreement, except as expressly provided herein.

          (c)  Assignment.  Neither of the parties  hereto may assign any of its
rights  or  obligations  under  this  Option  Agreement  or the  Option  created
hereunder to any other person,  without the express written consent of the other
party,  except  that in the event a Purchase  Event shall have  occurred  and be
continuing  Columbia  Bancorp  may  assign  in whole or in part its  rights  and
obligations  hereunder;  provided,  however,  that  to the  extent  required  by


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<PAGE>

applicable  regulatory  authorities,  Columbia Bancorp may not assign its rights
under the Option except in (i) a widely  dispersed public  distribution,  (ii) a
private placement in which no one party acquires the right to purchase in excess
of 2% of the voting  shares of Suburban  Bancshares,  (iii) an  assignment  to a
single party (e.g., a broker or investment banker) for the purpose of conducting
a widely dispersed public distribution on Columbia Bancorp's behalf, or (iv) any
other manner approved by applicable regulatory authorities.

          (d) Notices. All notices or other communications which are required or
permitted  hereunder  shall be in writing and  sufficient  if  delivered  in the
manner and to the address provided for in or pursuant to Section 15 of the Plan.

          (e) Counterparts.  This Option Agreement may be executed in any number
of  counterparts,  and each such  counterpart  shall be deemed to be an original
instrument,  but  all  such  counterparts  together  shall  constitute  but  one
agreement.

          (f) Specific  Performance.  The parties agree that damages would be an
inadequate  remedy for a breach of the  provisions  of this Option  Agreement by
either  party  hereto and that this Option  Agreement  may be enforced by either
party hereto through injunctive or other equitable relief.

          (g)  Governing  Law.  This Option  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Maryland  applicable  to
agreements made and entirely to be performed  within such state and such federal
laws as may be applicable.



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<PAGE>

     IN WITNESS  WHEREOF,  each of the parties  hereto has executed  this Option
Agreement as of the day and year first written above.

                                        SUBURBAN BANCSHARES, INC.



                                        By:-------------------------------------
                                           Winfield M. Kelly, Jr.
                                           Chairman of the Board
                                           and Chief Executive Officer


                                        COLUMBIA BANCORP


                                        By:-------------------------------------
                                           John M. Bond, Jr.
                                           President and Chief Executive Officer



                                       72
<PAGE>

                                                                     APPENDIX IV

                         FORM OF STOCK OPTION AGREEMENT

     This STOCK OPTION AGREEMENT (this "Option Agreement") dated as of September
28, 1999, between SUBURBAN BANCSHARES, INC. ("Suburban Bancshares"),  a Delaware
corporation,  and COLUMBIA BANCORP ("Columbia Bancorp"), a Maryland corporation,
recites and provides:

     A. The Board of Directors of Suburban  Bancshares and Columbia Bancorp have
approved a Plan and  Agreement  to Merge dated  September  28, 1999 (the "Plan")
providing for the merger (the "Holding Company  Merger") of Suburban  Bancshares
with and into Columbia Bancorp.

     B. As a condition to and as consideration  for Suburban  Bancshares'  entry
into the Plan and to induce such entry,  Columbia Bancorp has agreed to grant to
Suburban  Bancshares  the option set forth  herein to  purchase  authorized  but
unissued shares of Columbia Bancorp Common Stock.

     NOW, THEREFORE, the parties agree as follows:

     1. Definitions. Capitalized terms defined in the Plan and used herein shall
have the same meanings as in the Plan.

     2. Grant of Option.  Subject to the terms and  conditions set forth herein,
Columbia  Bancorp hereby grants to Suburban  Bancshares an option (the "Option")
to purchase up to 497,140 shares of Columbia Bancorp Common Stock at an exercise
price of $13.063 per share  payable in cash as provided in Section 4;  provided,
however, that in the event Columbia Bancorp issues or agrees to issue any shares
of Columbia  Bancorp Common Stock (other than as permitted  under the Plan) at a
price less than  $13.063  per share (as  adjusted  pursuant  to Section  6), the
exercise price shall be such lesser price.

     3. Exercise of Option.  (a) Unless Suburban  Bancshares shall have breached
in any material respect any covenant or representation contained in the Plan and
such breach has not been cured,  Suburban Bancshares may exercise the Option, in
whole or part, at any time or from time to time if a Purchase  Event (as defined
below) shall have occurred and be continuing;  provided,  that to the extent the
Option shall not have been  exercised,  it shall  terminate and be of no further
force and effect  upon the  earliest to occur of (i) the  Effective  Date of the
Holding Company  Merger,  or (ii) the termination of the Plan in accordance with
the  provisions  thereof prior to the occurrence of a Purchase Event (other than
as a result of a willful breach by Columbia Bancorp of any Specified Covenant or
as a result of failure of Columbia Bancorp's stockholders to approve the Plan by
the vote required under applicable law or under Columbia Bancorp's Charter),  or


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<PAGE>

(iii)  12  months  after  termination  of the Plan due to a  willful  breach  by
Columbia  Bancorp of any  Specified  Covenant or failure of  Columbia  Bancorp's
stockholders  to approve the Plan by the vote required  under  applicable law or
under Columbia Bancorp's Charter; provided, however, that any purchase of shares
upon exercise of the Option shall be subject to compliance  with applicable law,
including, without limitation, the Bank Holding Company Act of 1956, as amended.
Any  exercise  of the  Option  shall be subject to  compliance  with  applicable
provisions of law.

          (b) As used herein, a "Purchase Event" shall mean any of the following
events or transactions occurring after the date hereof:

               (i) Columbia Bancorp or The Columbia Bank ("Columbia Bank"),
     without having received  Suburban  Bancshares'  prior written consent,
     shall have entered  into an agreement  with any person (x) to merge or
     consolidate,  or  enter  into  any  similar  transaction,   except  as
     contemplated in the Plan, (y) to purchase, lease, or otherwise acquire
     all or substantially all of the assets of Columbia Bancorp or Columbia
     Bank,  or (z) to purchase or otherwise  acquire  (including  by way of
     merger,  consolidation,  share exchange,  or any similar  transaction)
     securities  representing  15% or more of the voting  power of Columbia
     Bancorp or Columbia Bank;

               (ii) any person  (other  than  Columbia  Bancorp or Columbia
     Bank in a fiduciary capacity,  or Suburban Bancshares or Columbia Bank
     in a fiduciary capacity) shall have acquired  beneficial  ownership or
     the  right  to  acquire  beneficial  ownership  of 15% or  more of the
     outstanding  shares of Columbia  Bancorp  Common  Stock after the date
     hereof (the term  "beneficial  ownership"  for purposes of this Option
     Agreement  having the meaning assigned thereto in Section 13(d) of the
     Securities   Exchange  Act  of  1934  (the  "Exchange  Act")  and  the
     regulations promulgated thereunder);

               (iii) any  person  shall have made a bona fide  proposal  to
     Columbia Bancorp by public announcement or written  communication that
     is or becomes the  subject of public  disclosure  to acquire  Columbia
     Bancorp or Columbia Bank by merger, consolidation,  purchase of all or
     substantially all of its assets, or any other similar transaction, and
     following such bona fide proposal the stockholders of Columbia Bancorp
     vote not to adopt the Plan; or

               (iv)  Columbia  Bancorp  shall have  willfully  breached any
     Specified  Covenant following a bona fide proposal to Columbia Bancorp
     or  Columbia  Bank to acquire  Columbia  Bancorp or  Columbia  Bank by
     merger,  consolidation,  purchase of all or  substantially  all of its
     assets, or any other similar  transaction,  which breach would entitle
     Suburban  Bancshares to terminate the Plan (without regard to the cure
     periods  provided  for  therein)  and such breach  shall not have been
     cured prior to the Notice Date (as defined below).

               If  more  than  one of the  transactions  giving  rise  to a
     Purchase Event under this Section 3(b) is undertaken or effected, then
     all such  transactions  shall  give rise only to one  Purchase  Event,


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<PAGE>

     which  Purchase  Event  shall be deemed  continuing  for all  purposes
     hereunder until all such  transactions are abandoned.  As used in this
     Option  Agreement,  "person"  shall  have the  meanings  specified  in
     Sections 3(a)(9) and 13(d)(3) of the Exchange Act.

          (c) In the event Suburban Bancshares wishes to exercise the Option, it
shall send to Columbia  Bancorp a written notice (the date of which being herein
referred to as the "Notice  Date")  specifying (i) the total number of shares it
will purchase  pursuant to such exercise,  and (ii) a place and date not earlier
than three  business  days nor later than 60 business days after the Notice Date
for the  closing of such  purchase  ("Closing  Date");  provided,  that if prior
notification  to or  approval  of any  federal  or state  regulatory  agency  is
required in connection with such purchase,  Suburban  Bancshares  shall promptly
file the required  notice or  application  for approval and shall  expeditiously
process  the same and the period of time that  otherwise  would run  pursuant to
this sentence shall run instead from the date on which any required notification
period has expired or been terminated or such approval has been obtained and any
requisite waiting period shall have passed.

          (d) As used herein,  "Specified  Covenant"  means any covenant made by
Columbia Bancorp and contained in Section 6 of the Plan.

     4. Payment and Delivery of Certificates.  (a) At the closing referred to in
Section 3,  Suburban  Bancshares  shall pay to Columbia  Bancorp  the  aggregate
purchase  price for the  shares  of  Columbia  Bancorp  Common  Stock  purchased
pursuant to the exercise of the Option in immediately  available funds by a wire
transfer to a bank account designated by Columbia Bancorp.

          (b) At such  closing,  simultaneously  with the  delivery  of funds as
provided  in  subsection  (a),   Columbia  Bancorp  shall  deliver  to  Suburban
Bancshares a certificate or  certificates  representing  the number of shares of
Columbia  Bancorp Common Stock  purchased by Suburban  Bancshares,  and Suburban
Bancshares  shall  deliver to Columbia  Bancorp a letter  agreeing that Suburban
Bancshares  will not  offer  to sell or  otherwise  dispose  of such  shares  in
violation of applicable law or the provisions of this Option Agreement.

          (c)  Certificates  for Columbia  Bancorp  Common Stock  delivered at a
closing  hereunder shall be endorsed with a restrictive  legend which shall read
substantially as follows:

     "THE TRANSFER OF THE SHARES REPRESENTED BY THIS CERTIFICATE IS SUBJECT
     TO  CERTAIN  PROVISIONS  OF  A  STOCK  OPTION  AGREEMENT  BETWEEN  THE
     REGISTERED HOLDER HEREOF AND COLUMBIA BANCORP ("COLUMBIA BANCORP") AND
     TO RESALE  RESTRICTIONS  ARISING UNDER THE  SECURITIES ACT OF 1933, AS
     AMENDED,  A COPY OF WHICH AGREEMENT IS ON FILE AT THE PRINCIPAL OFFICE
     OF COLUMBIA BANCORP.  A COPY OF SUCH AGREEMENT WILL BE PROVIDED TO THE


                                    75
<PAGE>

     HOLDER  HEREOF  WITHOUT  CHARGE UPON RECEIPT BY COLUMBIA  BANCORP OF A
     WRITTEN REQUEST."

          It is understood  and agreed that the above legend shall be removed by
delivery of substitute certificate(s) without such legend if Suburban Bancshares
shall have  delivered  to Columbia  Bancorp a copy of a letter from the staff of
the Securities and Exchange  Commission,  or an opinion of counsel,  in form and
substance  satisfactory to Columbia  Bancorp,  to the effect that such legend is
not  required  for  purposes  of the  Securities  Act of 1933,  as amended  (the
"Securities Act").

     5. Representations. Columbia Bancorp represents, warrants, and covenants to
Suburban Bancshares as follows:

          (a) Columbia Bancorp shall at all times maintain sufficient authorized
but unissued  shares of Columbia  Bancorp Common Stock so that the Option may be
exercised without  authorization of additional shares of Columbia Bancorp Common
Stock.

          (b) The shares to be issued upon due exercise, in whole or in part, of
the Option, when paid for as provided herein,  will be duly authorized,  validly
issued, fully paid, and nonassessable.

     6. Adjustment Upon Changes in Capitalization. In the event of any change in
Columbia Bancorp Common Stock by reason of stock dividends,  split-ups, mergers,
recapitalizations,  combinations, exchanges of shares, or the like, the type and
number of shares subject to the Option, and the purchase price per share, as the
case may be, shall be adjusted  appropriately.  In the event that any additional
shares  of  Columbia  Bancorp  Common  Stock  are  issued  or  otherwise  become
outstanding after the date of this Option Agreement (other than pursuant to this
Option Agreement), the number of shares of Columbia Bancorp Common Stock subject
to the Option shall be adjusted so that,  after such issuance,  it equals 9.936%
of the  number of shares of  Columbia  Bancorp  Common  Stock  then  issued  and
outstanding  without giving effect to any shares  subject or issued  pursuant to
the Option.  Nothing  contained  in this  Section 6 shall be deemed to authorize
Columbia Bancorp to breach any provision of the Plan.

     7.  Registration  Rights.  If  requested by Suburban  Bancshares,  Columbia
Bancorp shall as  expeditiously  as possible file a registration  statement on a
form of general use under the Securities Act if necessary in order to permit the
sale or other  disposition  of the shares of Columbia  Bancorp Common Stock that
have been acquired  upon exercise of the Option in accordance  with the intended
method of sale or other disposition  requested by Suburban Bancshares.  Suburban
Bancshares  shall  provide  all  information  reasonably  requested  by Columbia
Bancorp for  inclusion  in any  registration  statement  to be filed  hereunder.
Columbia Bancorp will use its best efforts to cause such registration  statement
first to become  effective  and then to remain  effective for such period not in
excess  of 270 days  from  the day such  registration  statement  first  becomes


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<PAGE>

effective  as  may be  reasonably  necessary  to  effect  such  sales  or  other
dispositions.  Only one  registration  may be effected  under this  Section 7 at
Columbia Bancorp's expense, and which shall not include underwriting commissions
and the fees and disbursements of Suburban  Bancshares' counsel  attributable to
the  registration  of such  Columbia  Bancorp  Common  Stock.  The filing of any
registration  statement  hereunder may be delayed for such period of time as may
reasonably be required to facilitate any public distribution by Columbia Bancorp
of Columbia  Bancorp  Common  Stock.  If  requested by Suburban  Bancshares,  in
connection with any such  registration,  Columbia Bancorp will become a party to
any underwriting  agreement relating to the sale of such shares, but only to the
extent  of  obligating  itself  in  respect  of   representations,   warranties,
indemnities,  and other  agreements  customarily  included in such  underwriting
agreements.  Upon  receiving  any request from  Suburban  Bancshares or assignee
thereof under this Section 7, Columbia  Bancorp agrees to send a copy thereof to
Suburban  Bancshares and to any assignee thereof known to Columbia  Bancorp,  in
each case by  promptly  mailing  the same,  postage  prepaid,  to the address of
record of the persons entitled to receive such copies.

     8. Severability. If any term, provision, covenant, or restriction contained
in this  Option  Agreement  is held by a court or a federal or state  regulatory
agency of competent  jurisdiction  to be invalid,  void, or  unenforceable,  the
remainder of the terms, provisions, and covenants, and restrictions contained in
this Option Agreement shall remain in full force and effect, and shall in no way
be  affected,  impaired,  or  invalidated.  If for  any  reason  such  court  or
regulatory  agency  determines  that the  Option  will not  permit the holder to
acquire the full number of shares of Columbia  Bancorp  Common Stock provided in
Section 2 (as  adjusted  pursuant to Section 6), it is the express  intention of
Columbia  Bancorp to allow the holder to acquire such lesser number of shares as
may be permissible, without any amendment or modification hereof.

     9. Miscellaneous.

          (a) Expenses. Except as otherwise provided herein, each of the parties
hereto shall bear and pay all costs and expenses incurred by it or on its behalf
in connection with the transactions  contemplated hereunder,  including fees and
expenses of its own financial consultants,  investment bankers, accountants, and
counsel.

          (b) Entire Agreement.  Except as otherwise  expressly provided herein,
this Option  Agreement  contains the entire  agreement  between the parties with
respect to the  transactions  contemplated  hereunder and  supersedes  all prior
arrangements or understandings with respect thereto,  written or oral. The terms
and  conditions  of this Option  Agreement  shall inure to the benefit of and be
binding upon the parties  hereto and their  respective  successors  and assigns.
Nothing in this Option  Agreement,  expressed or implied,  is intended to confer
upon any party, other than the parties hereto,  and their respective  successors
and assigns, any rights, remedies, obligations or liabilities under or by reason
of this Option Agreement, except as expressly provided herein.

          (c)  Assignment.  Neither of the parties  hereto may assign any of its
rights  or  obligations  under  this  Option  Agreement  or the  Option  created
hereunder to any other person,  without the express written consent of the other


                                       77
<PAGE>

party,  except  that in the event a Purchase  Event shall have  occurred  and be
continuing  Suburban  Bancshares  may  assign in whole or in part its rights and
obligations  hereunder;  provided,  however,  that  to the  extent  required  by
applicable regulatory authorities, Suburban Bancshares may not assign its rights
under the Option except in (i) a widely  dispersed public  distribution,  (ii) a
private placement in which no one party acquires the right to purchase in excess
of 2% of the voting shares of Columbia Bancorp,  (iii) an assignment to a single
party  (e.g.,  a broker or  investment  banker) for the purpose of  conducting a
widely dispersed public distribution on Suburban Bancshares' behalf, or (iv) any
other manner approved by applicable regulatory authorities.

          (d) Notices. All notices or other communications which are required or
permitted  hereunder  shall be in writing and  sufficient  if  delivered  in the
manner and to the address provided for in or pursuant to Section 15 of the Plan.

          (e) Counterparts.  This Option Agreement may be executed in any number
of  counterparts,  and each such  counterpart  shall be deemed to be an original
instrument,  but  all  such  counterparts  together  shall  constitute  but  one
agreement.

          (f) Specific  Performance.  The parties agree that damages would be an
inadequate  remedy for a breach of the  provisions  of this Option  Agreement by
either  party  hereto and that this Option  Agreement  may be enforced by either
party hereto through injunctive or other equitable relief.

          (g)  Governing  Law.  This Option  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Maryland  applicable  to
agreements made and entirely to be performed  within such state and such federal
laws as may be applicable.



                                       78
<PAGE>

     IN WITNESS  WHEREOF,  each of the parties  hereto has executed  this Option
Agreement as of the day and year first written above.

                                        SUBURBAN BANCSHARES, INC.



                                        By:-------------------------------------
                                           Winfield M. Kelly, Jr.
                                           Chairman of the Board
                                           and Chief Executive Officer


                                        COLUMBIA BANCORP



                                        By:-------------------------------------
                                           John M. Bond, Jr.
                                           President and Chief Executive Officer


                                       79
<PAGE>


                                                                      APPENDIX V

                       MEMORANDUM TO PERSONS DEEMED TO BE
                               AFFILIATED PERSONS


                                                              September 28, 1999

     This memorandum  summarizes  certain technical  requirements of the federal
securities  laws  and  of  the  accounting  rules  relating  to  treatment  as a
pooling-of-interests which will apply following completion of the combination of
SUBURBAN BANCSHARES, INC. ("Suburban Bancshares") by COLUMBIA BANCORP ("Columbia
Bancorp") by effecting the merger of Suburban  Bancshares with and into Columbia
Bancorp (the "Holding Company Merger").

     Pursuant to the Plan and  Agreement to Merge dated as of September 28, 1999
(the "Plan"),  shares of the Common Stock of Columbia  Bancorp will be issued to
the stockholders of Suburban Bancshares for each issued and outstanding share of
Common Stock of Suburban  Bancshares.  Columbia Bancorp will file a Registration
Statement  under the Securities Act of 1933, as amended (the  "Securities  Act")
with the Securities and Exchange  Commission  (the "SEC") to register  shares of
its Common Stock to be issued in connection with the Holding Company Merger.

     Under Section 5.10 of the Plan,  Suburban  Bancshares has agreed to deliver
to Columbia Bancorp written letter agreements (the "Affiliate  Agreements") from
each of the officers and directors of Suburban Bancshares (and has agreed to use
its best  efforts  to  obtain  and  deliver  an  Affiliate  Agreement  from each
stockholder of Suburban  Bancshares who may be deemed to be an "affiliate" under
the rules of the SEC).  Under the terms of the Affiliate  Agreements,  each such
officer,  director or stockholder  is to  acknowledge  and agree to abide by all
limitations  imposed by the  Securities  Act and by all rules,  regulations  and
releases  promulgated  thereunder  by the SEC with  respect to the sale or other
disposition of the shares of the Common Stock of Columbia Bancorp to be received
by such person  pursuant to the Plan.  Under Section 5.11 of the Plan,  Suburban
Bancshares  has  agreed  to  use  its  best  efforts  not to  permit  any of the
directors,  officers,  employees,  stockholders,  agents,  consultants  or other
representatives  of Suburban  Bancshares,  Suburban Bank of Maryland,  or any of
Suburban  Bancshares' other  subsidiaries to take any action that would preclude
Columbia  Bancorp  from  treating  the Mergers as a  "pooling-of-interests"  for
financial  reporting  purposes.  The purpose of this memorandum is to more fully
describe the resale restrictions imposed by the Securities Act and by all rules,
regulations  and  releases  promulgated  thereunder  and  the  accounting  rules
relating   to   the   treatment   of   the   Holding   Company   Merger   as   a
pooling-of-interests.

Resale Restrictions Imposed by Subparagraph (d) of SEC Rule 145.

     For the one-year period following the effective date of the Holding Company
Merger,  a person who is an affiliate of Suburban  Bancshares at the time of the


                                       80
<PAGE>

Holding Company Merger may dispose of his shares of the Common Stock of Columbia
Bancorp only pursuant to SEC Rule 145. The limitations are as follows:

          1. Such sale must be effected (a) in transactions directly with a
     market  maker  or (b) in  unsolicited  brokerage  transactions  (i.e.,
     neither  you nor the  broker  handling  the  sale of your  shares  may
     solicit a purchaser for the shares being sold). As there are usually a
     number of market makers for the Common Stock of Columbia Bancorp, this
     requirement  should not impair your  ability to find a  purchaser.  In
     each case it is quite  important to let your broker know that the sale
     is to be made  under  SEC Rule  145;  otherwise,  compliance  with the
     restrictions will not be assured.

          2. The rule also restricts the number of shares which may be sold
     during any three-month  period.  The rule would permit up to 1% of the
     outstanding  shares of the Common Stock of Columbia Bancorp to be sold
     by each affiliate during any three-month period.

          3. The rule  requires  current  public  information  on  Columbia
     Bancorp to be available at the time of your sales. Columbia Bancorp is
     required  by law to file with the SEC  reports  which are  designed to
     present on a current basis the affairs of Columbia Bancorp. The filing
     of  these  reports  will  satisfy  the  current   public   information
     requirements.  Since it is possible,  however,  that a required filing
     may be  late,  at the  time of any  sale  you  should  check  with the
     Secretary of Columbia Bancorp to ascertain whether public  information
     on  Columbia  Bancorp is then  available.  The  Secretary  of Columbia
     Bancorp is Mr. John A. Scaldara,  Jr., whose telephone number is (401)
     418-8656.

     After the one-year  period has run, so long as (a) you are not an affiliate
of Columbia Bancorp (that is, not a major  stockholder,  director,  or principal
officer of  Columbia  Bancorp)  at the time of the sale,  (b)  Columbia  Bancorp
continues to be required to file certain  periodic reports with the SEC, and (c)
all such  reports  required to be filed in the 12 months prior to your sale have
been filed, there will be no restriction on the sale of the shares of the Common
Stock of Columbia  Bancorp.  Prior to a contemplated  sale you should check with
the General Counsel of Columbia Bancorp to determine if requirements (b) and (c)
have been met. In the unlikely event that the three requirements set forth above
are not met at the time of your  sale,  the  procedures  for  sales  consummated
before the end of the one-year period would still apply.

     After two years from the Effective Date of the Holding Company  Merger,  so
long as you are not, at the time of sale, and have not been during the preceding
three months, an affiliate of Columbia Bancorp,  you may sell your shares of the
Common Stock of Columbia Bancorp with no restrictions.



                                    81
<PAGE>

Restrictions Imposed by Accounting Rules Regarding Treatment as a
Pooling-of-Interests.

     In order  for the  Mergers  to be  treated  as a  pooling-of-interests  for
accounting  purposes,  affiliates of Columbia Bancorp and affiliates of Suburban
Bancshares are required to observe certain  restrictions on disposition of their
shares of the  Common  Stock of  Columbia  Bancorp  and of the  Common  Stock of
Suburban  Bancshares.  Specifically,  such  affiliates  must  agree not to sell,
pledge,  transfer  or  otherwise  dispose of any  shares of the Common  Stock of
Columbia Bancorp or any shares of the Common Stock of Suburban Bancshares during
the 30-day period prior to the effective date of the Holding  Company Merger and
until  after  such  time as  results  covering  at  least  30  days of  combined
operations of Columbia Bancorp and Suburban  Bancshares after the effective date
of the  Mergers  have  been  published  by  Columbia  Bancorp  in the  form of a
quarterly  earnings report, an effective  registration  statement filed with the
SEC,  a report  to the SEC on  Forms  10-K,  10-Q or 8-K,  or any  other  public
issuance which includes such combined results or operations.

     To signify your consent to these  restrictions a copy of an Undertaking and
Agreement  is  attached  hereto and is to be executed by you (and where any such
shares are owned jointly, by the joint owner or owners) and returned to Suburban
Bancshares,  Inc.,  7505  Greenway  Center  Drive,  Greenbelt,  Maryland  20768,
attention of Winfield M. Kelly,  Jr.,  Chairman of the Board and Chief Executive
Officer.


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<PAGE>

                            UNDERTAKING AND AGREEMENT


     The  undersigned  has received a copy of a memorandum  dated  September 28,
1999  concerning  the  provisions  of the  federal  securities  laws and certain
accounting rules which relate to the Common Stock of SUBURBAN  BANCSHARES,  INC.
("Suburban Bancshares") and to resales of shares of the Common Stock of Columbia
Bancorp to be received by the undersigned in connection with the Holding Company
Merger of Suburban  Bancshares into Columbia  Bancorp.  The  undersigned  hereby
undertakes to comply fully with the provisions of the federal securities laws as
outlined in the memorandum and hereby agrees to the additional  restrictions  on
sales of the Common  Stock of  Suburban  Bancshares  and resale of shares of the
Common  Stock  of  Columbia   Bancorp   outlined  in  the   paragraph   entitled
"Restrictions   Imposed  by   Accounting   Rules   Regarding   Treatment   as  a
Pooling-of-Interests."

     In Witness  Whereof,  I have  hereunto  signed my name as of September  28,
1999.



                                      --------------------------, as joint owner



                                      --------------------------, as joint owner



                                      --------------------------, as joint owner




                                       83
<PAGE>

                                                                     APPENDIX VI

                       MEMORANDUM TO PERSONS DEEMED TO BE
                               AFFILIATED PERSONS


                                                              September 28, 1999

     This memorandum  summarizes  certain technical  requirements of the federal
securities  laws  and  of  the  accounting  rules  relating  to  treatment  as a
pooling-of-interests which will apply following completion of the combination of
SUBURBAN  BANCSHARES  ("Suburban  Bancshares") and COLUMBIA  BANCORP  ("Columbia
Bancorp") by effecting the merger of Suburban  Bancshares with and into Columbia
Bancorp (the "Holding Company Merger").

     Pursuant to the Plan and  Agreement to Merge dated as of September 28, 1999
(the "Plan"),  shares of the Common Stock of Columbia  Bancorp will be issued to
the stockholders of Suburban Bancshares for each issued and outstanding share of
Common Stock of Suburban  Bancshares.  Columbia Bancorp will file a Registration
Statement  under the Securities Act of 1933, as amended (the  "Securities  Act")
with the Securities and Exchange  Commission  (the "SEC") to register  shares of
its Common Stock to be issued in connection with the Holding Company Merger.

     Under Section 6.10 of the Plan,  Columbia  Bancorp has agreed to deliver to
Suburban Bancshares written letter agreements (the "Affiliate  Agreements") from
each of the  officers and  directors of Columbia  Bancorp (and has agreed to use
its best  efforts  to  obtain  and  deliver  an  Affiliate  Agreement  from each
stockholder of Columbia Bancorp who may be deemed to be an "affiliate" under the
rules of the SEC).  Under Section 6.11 of the Plan,  Columbia Bancorp has agreed
to use its best efforts not to permit any of the directors, officers, employees,
stockholders,  agents, consultants or other representatives of Columbia Bancorp,
The Columbia Bank, or any of Columbia  Bancorp's other  subsidiaries to take any
action that would  preclude  Columbia  Bancorp  from  treating  the Mergers as a
"pooling-of-interests"  for financial  reporting  purposes.  The purpose of this
memorandum  is to more fully  describe  the  accounting  rules  relating  to the
treatment of the Mergers as a pooling-of-interests.

Restrictions Imposed by Accounting Rules Regarding Treatment as a
Pooling-of-Interests.

     In order  for the  Mergers  to be  treated  as a  pooling-of-interests  for
accounting  purposes,  affiliates of Columbia Bancorp and affiliates of Suburban
Bancshares are required to observe certain  restrictions on disposition of their
shares of the  Common  Stock of  Columbia  Bancorp  and of the  Common  Stock of
Suburban  Bancshares.  Specifically,  such  affiliates  must  agree not to sell,
pledge,  transfer  or  otherwise  dispose of any  shares of the Common  Stock of
Columbia Bancorp or any shares of the Common Stock of Suburban Bancshares during
the 30-day  period  prior to the  effective  date of the Mergers and until after


                                       84
<PAGE>

such  time as  results  covering  at least  30 days of  combined  operations  of
Columbia Bancorp and Suburban Bancshares after the effective date of the Mergers
have been  published  by Columbia  Bancorp in the form of a  quarterly  earnings
report, an effective  registration statement filed with the SEC, a report to the
SEC on Forms 10-K, 10-Q or 8-K, or any other public issuance which includes such
combined results or operations.

     To signify your consent to these  restrictions a copy of an Undertaking and
Agreement  is  attached  hereto and is to be executed by you (and where any such
shares are owned jointly, by the joint owner or owners) and returned to Columbia
Bancorp, 9171 Baltimore National Pike, Ellicott City, Maryland 21042,  attention
of John A. Scaldara, Jr., Secretary.


                                       85
<PAGE>


                            UNDERTAKING AND AGREEMENT


     The  undersigned  has received a copy of a memorandum  dated  September 28,
1999 concerning the provisions of certain  accounting  rules which relate to the
Common Stock of COLUMBIA  BANCORP in connection  with the Holding Company Merger
of Suburban Bancshares into Columbia Bancorp.  The undersigned hereby undertakes
and agrees to comply  fully to the  restrictions  on sales of the  Common  Stock
outlined in the paragraph  entitled  "Restrictions  Imposed by Accounting  Rules
Regarding Treatment as a Pooling-of-Interests."

     In Witness  Whereof,  I have  hereunto  signed my name as of September  28,
1999.



                                      --------------------------, as joint owner



                                      --------------------------, as joint owner



                                      --------------------------, as joint owner


                                       86
<PAGE>

                                                                    APPENDIX VII

                            FORM OF SUPPORT AGREEMENT

     THIS SUPPORT AGREEMENT (this  "Agreement")  dated as of September 28, 1999,
between  COLUMBIA  BANCORP,  a Maryland  corporation and registered bank holding
company ("Columbia  Bancorp"),  and each of the individuals listed on Schedule A
attached hereto (collectively, the "Suburban Bancshares Stockholders").

                              W I T N E S S E T H:

     WHEREAS, the Suburban Bancshares  Stockholders (i) collectively possess the
sole or  joint  right to  vote,  or  direct  the  voting  of,  an  aggregate  of
___________ shares of common stock, par value $.01 per share (the "Shares"),  of
Suburban  Bancshares,  Inc., a Delaware  corporation and registered bank holding
company ("Suburban  Bancshares"),  which constitute approximately _____ % of the
outstanding capital stock of Suburban Bancshares,  and (ii) individually possess
the right to vote,  or to direct  the  voting of, the number of Shares set forth
opposite such Suburban Bancshares Stockholder's name on Schedule A hereto; and

     WHEREAS, the Suburban Bancshares  Stockholders (i) collectively possess the
sole or joint power to dispose of, or to direct the disposition of, an aggregate
of ___________ Shares, which constitute approximately _____ % of the outstanding
capital stock of Suburban Bancshares, and (ii) individually possess the power to
dispose  of,  or direct  the  disposition  of,  the  number of Shares  set forth
opposite such Suburban Bancshares Stockholder's name on Schedule A hereto; and

     WHEREAS,  Columbia  Bancorp has entered into a Plan and  Agreement to Merge
with Suburban Bancshares,  dated as of the business day immediately prior to the
date hereof (the "Plan"), pursuant to which Suburban Bancshares would merge with
and into Columbia  Bancorp (the "Holding  Company  Merger"),  with shares of the
Common Stock of Columbia  Bancorp to be issued to the  stockholders  of Suburban
Bancshares; and

     WHEREAS,  pursuant to Section  5.10 of the Plan,  Suburban  Bancshares  has
covenanted to obtain  agreements from each of its officers and directors (and to
use  commercially  reasonable  efforts to obtain  agreements from any such other
person  identified  herein as a Suburban  Bancshares  Stockholder)  in which the
officers and  directors of Suburban  Bancshares  (in their  capacity as Suburban
Bancshares Stockholders) and the Suburban Bancshares Stockholders would agree to
support the Holding Company  Merger;  and the Suburban  Bancshares  Stockholders
have in  accordance  with such  covenant  agreed to support the Holding  Company
Merger.

     NOW,  THEREFORE,  to induce Columbia  Bancorp to enter into the Plan and in
consideration of the mutual covenants and agreements set forth herein and in the
Plan and the mutual benefits to be derived  herefrom and therefrom,  the parties
agree as follows:



                                       87
<PAGE>

     1.  Representations of the Suburban  Bancshares  Stockholders.  Each of the
Suburban Bancshares Stockholders, severally, and not jointly, represents that:

          (a)(1) such Suburban Bancshares Stockholder possesses the sole or
     joint  right to vote,  or direct  the voting of, all of the Shares set
     forth on Schedule A opposite  the  Suburban  Bancshares  Stockholder's
     name,  (2) such  number of Shares  constitutes  all of the Shares with
     respect to which the Suburban  Bancshares  Stockholder  possesses  the
     sole or joint right to vote,  or direct the voting of, as the case may
     be, and (3) except as to Shares held only under a power of attorney or
     as guardian or custodian,  such Suburban  Bancshares  Stockholder  has
     good and  merchantable  title to all of the Shares  indicated  on said
     list opposite the Suburban Bancshares  Stockholder's name, free of all
     restrictions and  encumbrances of every kind and character,  except as
     indicated on Schedule A.

          (b)(1) such Suburban Bancshares Stockholder possesses the sole or
     joint  power to dispose of, or direct the  disposition  of, the Shares
     set forth on Schedule A opposite the Suburban Bancshares Stockholder's
     name,  (2) such  number of Shares  constitutes  all of the Shares with
     respect to which the Suburban Bancshares Stockholder possesses or will
     possess  the  sole  or  joint  power  to  dispose  of  or  direct  the
     disposition of, and (3) except as to Shares held only under a power of
     attorney,   such  Suburban   Bancshares   Stockholder   has  good  and
     merchantable  title  to all of  the  Shares  indicated  on  said  list
     opposite  the  Suburban  Bancshares  Stockholder's  name  free  of all
     restrictions  and  encumbrances  of any kind or  character  except  as
     indicated on Schedule A.

          (c) such Suburban Bancshares  Stockholder does not own, of record
     or beneficially,  any Shares that are not reflected on Schedule A. For
     the purposes of this Agreement,  beneficial  ownership has the meaning
     set forth in Rule 13d-3 of the  Securities  Exchange  Act of 1934,  as
     amended.

          (d) such Suburban  Bancshares  Stockholder has full right, power,
     and authority to enter into, deliver and perform this Agreement;  this
     Agreement  has been  duly  executed  and  delivered  by such  Suburban
     Bancshares  Stockholder;  and this  Agreement  constitutes  the legal,
     valid, and binding obligation of the Suburban Bancshares  Stockholder,
     and is enforceable in accordance with its terms.

     2. Covenants of the Suburban Bancshares Stockholders.  Each of the Suburban
Bancshares Stockholders, severally and not jointly, covenants as follows:

          (a)  Restrictions  on Transfer.  With respect to Shares listed on
     Schedule  A,  during  the  term  of  this  Agreement,   such  Suburban
     Bancshares  Stockholder  shall not  voluntarily  pledge,  hypothecate,
     grant a security interest in, sell, transfer,  or otherwise dispose of


                                       88
<PAGE>

     or encumber any of such Shares and will not enter into any  agreement,
     arrangement,  or understanding  (other than a proxy for the purpose of
     voting his or her Shares in accordance with  Subparagraph 2(c) hereof)
     which would, during that term (i) restrict,  (ii) establish a right of
     first refusal to, or (iii) otherwise  relate to the transfer or voting
     of such Shares; provided, however, this restriction shall not apply to
     a transfer of any of the Shares by the Suburban Bancshares Stockholder
     to his or her  spouse,  children,  or  grandchildren,  subject  to the
     conditions  that any transferee,  recipient,  or custodian of any such
     transferee or recipient must execute an agreement substantially in the
     form of this Agreement in a form satisfactory to Columbia Bancorp, and
     Schedule A hereto may be revised by Columbia  Bancorp to reflect  such
     transfer.

          (b) Other Restrictions.  During the term of this Agreement,  such
     Suburban Bancshares Stockholder, as a Suburban Bancshares Stockholder,
     shall not,  directly or indirectly,  solicit,  initiate,  or encourage
     inquiries or proposals  from, or  participate  in any  discussions  or
     negotiations  with,  or provide any  information  to, any  individual,
     corporation,  partnership,  or other person,  entity,  or group (other
     than Columbia Bancorp,  any of its subsidiaries,  and their respective
     officers, employees,  representatives, and agents) concerning any sale
     of assets,  sale of shares of capital  stock,  merger,  consolidation,
     share exchange, or similar transactions involving Suburban Bancshares.
     Such Suburban  Bancshares  Stockholder  shall promptly advise Columbia
     Bancorp of, and communicate to Columbia Bancorp the terms of, any such
     inquiry  or  proposal  addressed  either to such  Suburban  Bancshares
     Stockholder or to Suburban  Bancshares  that such Suburban  Bancshares
     Stockholder receives or of which such Suburban Bancshares  Stockholder
     has knowledge.

          (c) Holding Company Merger.  With respect to the Shares listed on
     Schedule A pursuant to Subparagraph 1(a) hereof,  each of the Suburban
     Bancshares  Stockholders  shall vote such Shares to ratify and confirm
     the  Plan  and  the  Holding  Company  Merger  and  the   transactions
     contemplated thereby. Each of the Suburban Bancshares Stockholders, as
     a  Suburban  Bancshares   Stockholder,   further  agrees  to  use  all
     commercially reasonable efforts to cause the Mergers to be effected.

          (d) Additional  Shares.  The provisions of subparagraphs  (a) and
     (c) above  shall  apply to all Shares  currently  owned and  hereafter
     acquired,  of  record  or  beneficially,   by  each  of  the  Suburban
     Bancshares Stockholders.

     3. Termination.  This Agreement shall terminate upon the termination of the
Plan.

     4. Governing  Law. This Agreement  shall in all respects be governed by and
construed under the laws of Maryland,  all rights and remedies being governed by
such laws.



                                       89
<PAGE>

     5. Benefit of Agreement.  This Agreement shall be binding upon and inure to
the  benefit  of,  and shall be  enforceable  by, the  parties  hereto and their
respective  personal  representatives,  successors,  and  assigns,  except  that
neither party may transfer or assign any of its respective rights or obligations
hereunder  without  the  prior  written  consent  of the  other  party or, if by
Columbia Bancorp, in accordance with the Plan.

     6. Counterparts.  For convenience of the parties hereto, this Agreement may
be executed in several counterparts,  each of which shall be deemed an original,
all of which together shall constitute one and the same instrument.

     IN  WITNESS  WHEREOF,   Columbia   Bancorp  and  the  Suburban   Bancshares
Stockholders  have caused this  Agreement to be duly  executed as of the day and
year first above written.

                                        COLUMBIA BANCORP


                                        By:-------------------------------------
                                           John M. Bond, Jr.
                                           President and Chief Executive Officer


                                        SUBURBAN BANCSHARES STOCKHOLDERS:



                                        ----------------------------------------



                                        ----------------------------------------



                                        ----------------------------------------



                                        ----------------------------------------



                                       90
<PAGE>

                                   SCHEDULE A



<TABLE>

<CAPTION>
<S>        <C>                  <C>                 <C>                      <C>                       <C>

Name       Number of Shares     Number of Shares    Number of Shares As      Number of Shares As       Encumbrance
           As to which          As to which         to which Holder Has      to Which Holder Has
           Holder has Sole      Holder  has Joint   Direct or Indirect       Sole or Shared Power to
           Power to Vote        Power to Vote       Control of Power to      Dispose or Direct
                                                    Vote                     Disposition






*    Pending confirmation on __________.

</TABLE>


                                       91
<PAGE>


                                                                   APPENDIX VIII

                            FORM OF SUPPORT AGREEMENT

     THIS SUPPORT AGREEMENT (this  "Agreement")  dated as of September 28, 1999,
between  SUBURBAN  BANCSHARES  INC., a Delaware  corporation and registered bank
holding company ("Suburban  Bancshares"),  and each of the individuals listed on
Schedule A attached hereto (collectively, the "Columbia Bancorp Stockholders").

                              W I T N E S S E T H:

     WHEREAS,  the Columbia Bancorp  Stockholders  (i) collectively  possess the
sole or  joint  right to  vote,  or  direct  the  voting  of,  an  aggregate  of
___________ shares of common stock, par value $.01 per share (the "Shares"),  of
Columbia  Bancorp,  a Maryland  corporation  and registered bank holding company
("Columbia Bancorp"),  which constitute approximately _____ % of the outstanding
capital stock of Columbia Bancorp,  and (ii)  individually  possess the right to
vote,  or to direct the voting of, the number of Shares set forth  opposite such
Columbia Bancorp Stockholder's name on Schedule A hereto; and

     WHEREAS,  the Columbia Bancorp  Stockholders  (i) collectively  possess the
sole or joint power to dispose of, or to direct the disposition of, an aggregate
of ___________ Shares, which constitute approximately _____ % of the outstanding
capital stock of Columbia Bancorp,  and (ii)  individually  possess the power to
dispose  of,  or direct  the  disposition  of,  the  number of Shares  set forth
opposite such Columbia Bancorp Stockholder's name on Schedule A hereto; and

     WHEREAS,  Columbia  Bancorp has entered into a Plan and  Agreement to Merge
with Suburban Bancshares,  dated as of the business day immediately prior to the
date hereof (the "Plan"), pursuant to which Suburban Bancshares would merge with
and into Columbia  Bancorp (the "Holding  Company  Merger"),  with shares of the
Common Stock of Columbia  Bancorp to be issued to the  stockholders  of Suburban
Bancshares; and

     WHEREAS,  pursuant  to  Section  6.10 of the  Plan,  Columbia  Bancorp  has
covenanted to obtain  agreements from each of its officers and directors (and to
use  commercially  reasonable  efforts to obtain  agreements from any such other
person  identified  herein  as a  Columbia  Bancorp  Stockholder)  in which  the
officers  and  directors  of  Columbia  Bancorp  (in their  capacity as Columbia
Bancorp  Stockholders)  and the  Columbia  Bancorp  Stockholders  would agree to
support the Holding Company Merger;  and the Columbia Bancorp  Stockholders have
in accordance with such covenant agreed to support the Holding Company Merger.

     NOW,  THEREFORE,  to induce Columbia  Bancorp to enter into the Plan and in
consideration of the mutual covenants and agreements set forth herein and in the
Plan and the mutual benefits to be derived  herefrom and therefrom,  the parties
agree as follows:

     1.  Representations  of the  Columbia  Bancorp  Stockholders.  Each  of the
Columbia Bancorp Stockholders, severally, and not jointly, represents that:



                                       92
<PAGE>

          (a)(1) such Columbia  Bancorp  Stockholder  possesses the sole or
     joint  right to vote,  or direct  the voting of, all of the Shares set
     forth on Schedule A opposite the Columbia Bancorp  Stockholder's name,
     (2) such number of Shares  constitutes  all of the Shares with respect
     to which the Columbia Bancorp Stockholder  possesses the sole or joint
     right to vote,  or direct  the  voting of, as the case may be, and (3)
     except as to Shares held only under a power of attorney or as guardian
     or  custodian,   such  Columbia  Bancorp   Stockholder  has  good  and
     merchantable  title  to all of  the  Shares  indicated  on  said  list
     opposite  the  Columbia  Bancorp   Stockholder's  name,  free  of  all
     restrictions and  encumbrances of every kind and character,  except as
     indicated on Schedule A.

          (b)(1) such Columbia  Bancorp  Stockholder  possesses the sole or
     joint  power to dispose of, or direct the  disposition  of, the Shares
     set forth on Schedule A opposite  the Columbia  Bancorp  Stockholder's
     name,  (2) such  number of Shares  constitutes  all of the Shares with
     respect to which the Columbia  Bancorp  Stockholder  possesses or will
     possess  the  sole  or  joint  power  to  dispose  of  or  direct  the
     disposition of, and (3) except as to Shares held only under a power of
     attorney,  such Columbia Bancorp Stockholder has good and merchantable
     title  to all of the  Shares  indicated  on  said  list  opposite  the
     Columbia  Bancorp  Stockholder's  name  free of all  restrictions  and
     encumbrances of any kind or character  except as indicated on Schedule
     A.

          (c) such Columbia Bancorp  Stockholder does not own, of record or
     beneficially, any Shares that are not reflected on Schedule A. For the
     purposes of this Agreement,  beneficial  ownership has the meaning set
     forth  in Rule  13d-3  of the  Securities  Exchange  Act of  1934,  as
     amended.

          (d) such Columbia Bancorp  Stockholder has full right, power, and
     authority  to enter into,  deliver and perform  this  Agreement;  this
     Agreement  has been  duly  executed  and  delivered  by such  Columbia
     Bancorp Stockholder;  and this Agreement constitutes the legal, valid,
     and binding  obligation of the Columbia  Bancorp  Stockholder,  and is
     enforceable in accordance with its terms.

     2.  Covenants of the Columbia  Bancorp  Stockholders.  Each of the Columbia
Bancorp Stockholders, severally and not jointly, covenants as follows:

          (a)  Restrictions  on Transfer.  With respect to Shares listed on
     Schedule A, during the term of this Agreement,  such Columbia  Bancorp
     Stockholder  shall  not  voluntarily  pledge,  hypothecate,   grant  a
     security  interest in,  sell,  transfer,  or  otherwise  dispose of or
     encumber  any of such  Shares and will not enter  into any  agreement,
     arrangement,  or understanding  (other than a proxy for the purpose of
     voting his or her Shares in accordance with  Subparagraph 2(c) hereof)
     which would, during that term (i) restrict,  (ii) establish a right of


                                       93
<PAGE>

     first refusal to, or (iii) otherwise  relate to the transfer or voting
     of such Shares; provided, however, this restriction shall not apply to
     a transfer of any of the Shares by the Columbia Bancorp Stockholder to
     his  or  her  spouse,  children,  or  grandchildren,  subject  to  the
     conditions  that any transferee,  recipient,  or custodian of any such
     transferee or recipient must execute an agreement substantially in the
     form of this Agreement in a form satisfactory to Columbia Bancorp, and
     Schedule A hereto may be revised by Columbia  Bancorp to reflect  such
     transfer.

          (b) Other Restrictions.  During the term of this Agreement,  such
     Columbia Bancorp Stockholder, as a Columbia Bancorp Stockholder, shall
     not, directly or indirectly, solicit, initiate, or encourage inquiries
     or proposals  from, or participate in any  discussions or negotiations
     with,  or provide any  information  to, any  individual,  corporation,
     partnership,  or other person,  entity,  or group (other than Suburban
     Bancshares,  any of its subsidiaries,  and their respective  officers,
     employees, representatives, and agents) concerning any sale of assets,
     sale  of  shares  of  capital  stock,  merger,  consolidation,   share
     exchange,  or similar  transactions  involving Columbia Bancorp.  Such
     Columbia Bancorp Stockholder shall promptly advise Suburban Bancshares
     of, and  communicate  to  Suburban  Bancshares  the terms of, any such
     inquiry  or  proposal   addressed  either  to  such  Columbia  Bancorp
     Stockholder  or  to  Columbia   Bancorp  that  such  Columbia  Bancorp
     Stockholder receives or of which such Columbia Bancorp Stockholder has
     knowledge.

          (c) Holding Company Merger.  With respect to the Shares listed on
     Schedule A pursuant to Subparagraph 1(a) hereof,  each of the Columbia
     Bancorp  Stockholders shall vote such Shares to ratify and confirm the
     Plan and the Holding Company Merger and the transactions  contemplated
     thereby.  Each of the  Columbia  Bancorp  Stockholders,  as a Columbia
     Bancorp Stockholder, further agrees to use all commercially reasonable
     efforts to cause the Holding Company Merger to be effected.

          (d) Additional  Shares.  The provisions of subparagraphs  (a) and
     (c) above  shall  apply to all Shares  currently  owned and  hereafter
     acquired,  of record or beneficially,  by each of the Columbia Bancorp
     Stockholders.

     3. Termination.  This Agreement shall terminate upon the termination of the
Plan.

     4. Governing  Law. This Agreement  shall in all respects be governed by and
construed under the laws of Maryland,  all rights and remedies being governed by
such laws.

     5. Benefit of Agreement.  This Agreement shall be binding upon and inure to
the  benefit  of,  and shall be  enforceable  by, the  parties  hereto and their
respective  personal  representatives,  successors,  and  assigns,  except  that
neither party may transfer or assign any of its respective rights or obligations
hereunder  without  the  prior  written  consent  of the  other  party or, if by
Columbia Bancorp, in accordance with the Plan.



                                       94
<PAGE>

     6. Counterparts.  For convenience of the parties hereto, this Agreement may
be executed in several counterparts,  each of which shall be deemed an original,
all of which together shall constitute one and the same instrument.

     IN WITNESS  WHEREOF,  Suburban  Bancshares,  Inc. and the Columbia  Bancorp
Stockholders  have caused this  Agreement to be duly  executed as of the day and
year first above written.

                                        SUBURBAN BANCSHARES, INC.



                                        By:-------------------------------------
                                           Winfield M. Kelly, Jr.
                                           Chairman of the Board
                                           and Chief Executive Officer


                                        COLUMBIA BANCORP STOCKHOLDERS:



                                        ----------------------------------------



                                        ----------------------------------------



                                        ----------------------------------------



                                        ----------------------------------------



                                        ----------------------------------------


                                       95
<PAGE>

                                   SCHEDULE A



<TABLE>

<CAPTION>
<S>        <C>                  <C>                 <C>                      <C>                       <C>

Name       Number of Shares     Number of Shares    Number of Shares As      Number of Shares As       Encumbrance
           As to which          As to which         to which Holder Has      to Which Holder Has
           Holder has Sole      Holder  has Joint   Direct or Indirect       Sole or Shared Power to
           Power to Vote        Power to Vote       Control of Power to      Dispose or Direct
                                                    Vote                     Disposition






*    Pending confirmation on __________.

</TABLE>



                                       96
<PAGE>

                                                                     APPENDIX IX

                         FORM OF OPINION OF TAX COUNSEL


          (1) The  transfer  of all of the  assets  of  Suburban  Bancshares  to
Columbia  Bancorp,  and the assumption by Columbia Bancorp of the liabilities of
Suburban  Bancshares  pursuant  to the  terms of the  Plan,  will  constitute  a
reorganization  within the meaning of Section 368(a)(1)(A) of the Code. Suburban
Bancshares  and Columbia  Bancorp  will each be a "party to the  reorganization"
within the meaning of Section 368(b) of the Code.

          (2) A holder of Suburban  Bancshares  Common Stock who receives solely
shares of Columbia Bancorp Common Stock in exchange for his Suburban  Bancshares
Common  Stock  (including  fractional  shares of Columbia  Bancorp  Common Stock
deemed  issued as described  below) will not recognize any gain or loss upon the
exchange.

          (3) A holder of Suburban  Bancshares Common Stock who receives cash in
lieu of a fractional  share of Columbia  Bancorp Common Stock will be treated as
if he received a fractional  share of Columbia  Bancorp Common Stock pursuant to
the Holding  Company Merger and Columbia  Bancorp then redeemed such  fractional
share for the cash received.  Such a holder will recognize  capital gain or loss
on the constructive redemption of the fractional share in an amount equal to the
difference  between the cash received and the adjusted  basis of the  fractional
share.

          (4) The basis of the Columbia  Bancorp  Common  Stock  received by the
Suburban  Bancshares  stockholders  (including  fractional  shares  of  Columbia
Bancorp  Common Stock deemed issued as described  above) will be the same as the
basis of the Suburban Bancshares Common Stock surrendered in exchange therefor.

          (5) The holding  period of the Columbia  Bancorp Common Stock received
by the Suburban Bancshares stockholders will include the period during which the
Suburban  Bancshares  Common Stock  surrendered  in exchange  therefor was held,
provided that the Suburban Bancshares Common Stock is held as a capital asset in
the hands of the Suburban Bancshares stockholders on the date of the exchange.

          (6) No gain or loss will be recognized by Suburban Bancshares upon the
transfer of all of its assets to Columbia  Bancorp in exchange for shares of the
Common Stock of Columbia  Bancorp and the assumption by Columbia  Bancorp of the
liabilities of Suburban Bancshares.

          (7) No gain or loss will be  recognized  by Columbia  Bancorp upon the
receipt  by  Columbia  Bancorp of all of the assets of  Suburban  Bancshares  in
exchange for shares of the Common Stock of Columbia  Bancorp and the  assumption
by Columbia Bancorp of the liabilities of Suburban Bancshares.



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<PAGE>

          (8) The basis of each  asset of  Suburban  Bancshares  in the hands of
Columbia  Bancorp  will be the same as the  basis of such  asset in the hands of
Suburban Bancshares immediately prior to the Holding Company Merger; the holding
period of each such asset in the hands of  Columbia  Bancorp  will  include  the
periods during which such asset was held by Suburban Bancshares.

          (9) No gain or loss will be recognized to the stockholders of Columbia
Bancorp as a result of the transactions contemplated by the Plan.

          (10) The  accumulated  earnings and profits of Suburban  Bancshares on
the  Effective  Date will be added to the  accumulated  earnings  and profits of
Columbia Bancorp and will be available for subsequent distributions of dividends
within the meaning of Section 316 of the Code.



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                                                                      APPENDIX X

                FORM OF OPINION OF COUNSEL TO SUBURBAN BANCSHARES

          (a)  Suburban  Bancshares  has  been  duly  organized  and is  validly
existing as a corporation under the laws of the State of Delaware,  and Suburban
Bank has been duly  organized and is validly  existing as a banking  institution
under the laws of the State of Maryland.

          (b) The  execution  and  delivery  of the  Plan and the  Stock  Option
Agreement by Suburban  Bancshares and the consummation of Suburban Bancshares of
the transactions provided for therein have been duly authorized by all requisite
corporate and stockholder  action on the part of Suburban  Bancshares.  Suburban
Bancshares  has the  corporate  power and  corporate  authority  to execute  and
deliver  the  Plan  and  the  Stock  Option  Agreement  and  to  consummate  the
transactions contemplated thereby.

          (c) The Plan and the Stock  Option  Agreement  have been  executed and
delivered  by  Suburban  Bancshares  and are valid and  binding  obligations  of
Suburban Bancshares,  enforceable against Suburban Bancshares in accordance with
their terms, except to the extent that enforcement thereof may be limited by (i)
bankruptcy,     insolvency,    moratorium,     reorganization,     receivership,
conservatorship  or other similar laws now or hereinafter in effect  relating to
or affecting the  enforcement  of creditors'  rights  generally or the rights of
creditors of insured depository institutions or their holding companies and (ii)
general  principles  of equity,  regardless  of whether such  enforceability  is
considered in a proceeding at law or in equity.

          (d) The execution and delivery and performance by Suburban  Bancshares
of the Plan and the Stock Option  Agreement will not violate the  Certificate of
Incorporation or By Laws of Suburban Bancshares.

          (e) No consent or approval of, or other action by or filing with,  any
court or administrative or governmental body which has not been obtained,  taken
or made is required  under the Subject  Laws (as  defined  below),  or any court
order or judgment  specifically  applicable to Suburban  Bancshares and actually
known to such counsel,  for Suburban  Bancshares to execute and deliver the Plan
and the Stock Option Agreement and to consummate the  transactions  provided for
therein. Such counsel need express no opinion,  however, as to any such consent,
approval,  action or filing  which may be  required  as the  result of  Columbia
Bancorp's involvement in the transactions contemplated by the Plan and the Stock
Option Agreement because of such entities' legal or regulatory status or because
of other facts specifically pertaining to Columbia Bancorp.

          (f)  Assuming  due  authorization  of the  Holding  Company  Merger by
Columbia  Bancorp and the Columbia Bancorp  stockholders,  upon the filing of an
Agreement  and  Articles  of  Merger  with  the  Maryland  State  Department  of
Assessments and Taxation and the Delaware  Secretary of State in accordance with
the Plan, the Holding  Company  Merger will be effective in accordance  with the
laws of the State of Maryland and of the State of Delaware.



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          (g) Assuming due authorization of the Bank Merger by Columbia Bank and
the Columbia Bank stockholders,  upon issuance of a Certificate of Merger by the
Maryland  Commissioner of Financial  Institutions and the filing of an Agreement
of Bank Merger and the  Certificate  of Merger with and acceptance for record by
the Maryland State Department of Assessments and Taxation in accordance with the
Plan, the Bank Merger will be effective in accordance with the laws of the State
of Maryland.

          (h) The Proxy Statement/Prospectus,  insofar as it constituted a proxy
statement  for  the  special   meeting  (the  "Special   Meeting")  of  Suburban
Bancshares'  stockholders held on  _____________,  1999, as of the date thereof,
complied as to form in all material respects to the requirements of the Exchange
Act,  and the rules and  regulations  promulgated  thereunder,  except that such
counsel need express no opinion as to (i) the  financial  statements,  schedules
and other  financial,  statistical  and tabular data included in or incorporated
into the Proxy Statement/Prospectus, (ii) any document incorporated by reference
into  the  Proxy  Statement/Prospectus,  (iii)  the  exhibits  to  any  document
incorporated  by  reference  into  the  Proxy  Statement/Prospectus,   (iv)  the
description of the analyses  performed by the investment banker in rendering its
fairness  opinion,  or (v)  information  relating  to  Columbia  Bancorp  or the
Columbia Subsidiaries which was included in the Proxy Statement/Prospectus. Such
counsel need not assume any  responsibility  for the accuracy,  completeness  of
fairness of the statements  contained in the Proxy  Statement/Prospectus  or any
documents incorporated by reference therein except as set forth in the paragraph
immediately following this one.

     In  connection  with  the  Mergers,   such  counsel  shall  state  that  it
participated in conferences with certain officers and other  representatives  of
Suburban  Bancshares  and  Suburban  Bank at which  the  contents  of the  Proxy
Statement/Prospectus  and related  matters were  discussed  and,  although  such
counsel  is not  passing  upon and does not assume  any  responsibility  for the
accuracy,  fairness or  completeness  of the  statements  contained in the Proxy
Statement/Prospectus  and  made no  independent  check  or  verification  of the
existence  or  absence  of any  matter  set forth  therein,  on the basis of the
foregoing,  such  counsel  shall state that no facts have come to its  attention
that leads it to believe that the Proxy  Statement/Prospectus  as of the date it
was mailed to Suburban  Bancshares'  stockholders and on the date of the Special
Meeting contemplated  thereby,  contained an untrue statement of a material fact
or omitted to state a material fact  required to be stated  therein or necessary
to make the statements  therein,  in light of the circumstances under which they
were made, not misleading,  except that such counsel need not express any belief
with respect to (i) the financial  statements,  schedules  and other  financial,
statistical  and  tabular  data  included  in or  incorporated  into  the  Proxy
Statement/Prospectus, (ii) the exhibits thereto and the exhibits to any document
incorporated  by  reference  into  the  Proxy  Statement/Prospectus,  (iii)  the
documents  incorporated  by  reference  therein,  (iv)  the  description  of the
analyses  performed by the investment  banker in rendering its fairness opinion,
or (v) any information relating to Columbia Bancorp or the Columbia Subsidiaries
contained therein.  In rendering such statement,  such counsel may state that it
has served only as special  counsel to Suburban  Bancshares  and Suburban  Bank,
that such  representation  of such  entities has been limited to acting as their
special  counsel  with  respect to the  Mergers and on certain  other  unrelated


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matters on which such counsel has been  consulted by the  management of Suburban
Bancshares  or Suburban  Bank,  and that such counsel has relied solely upon the
examination and inquiries stated therein.

     In  rendering  such  opinion,   such  counsel  may,   without   independent
verification, assume: (i) the genuineness of all signatures and the authenticity
of all  documents  submitted to such counsel as  originals,  the  conformity  to
original  documents of all  documents  submitted  to such counsel as  certified,
conformed or reproduction copies, and the authenticity of such originals of such
latter  documents;  (ii) the  execution  of such  documents,  acknowledgment  as
indicated thereon and receipt of the  consideration  recited therein by Columbia
Bancorp,  (iii) that  Columbia  Bancorp has the full power,  authority and legal
right under its articles of  incorporation  and other  governing  documents  and
applicable  laws, as the case may be, to execute and to perform its  obligations
under  all  documents  executed  by  it  in  connection  with  the  transactions
contemplated by the Plan and the Stock Option Agreement; (iv) that the foregoing
documents,  in the forms  submitted  to such  counsel for review,  have not been
altered or amended in any respect  material to such counsel's  opinion as stated
herein;  (v) that  there are no other  agreements  or  understandings  among the
parties  that  would  modify  the  terms  of the  proposed  transactions  or the
respective rights or obligations of the parties thereunder; (vi) the accuracy of
the  representations  and warranties of Suburban Bancshares and Suburban Bank as
set forth in the Plan; (vii) the accuracy of all  certifications  made available
to such counsel from public  officials and officers of Suburban  Bancshares  and
Suburban  Bank on which such  counsel is relying in  rendering  the opinions set
forth above;  and (viii) the validity of all laws and regulations  applicable to
the transactions contemplated by the Plan and the Stock Option Agreement.

     Furthermore,  to the extent not  inconsistent  with the other  assumptions,
qualifications  and  limitations  set  forth  in such  counsel's  opinion,  such
counsel's  opinion shall be governed by, and shall be  interpreted in accordance
with, the Legal Opinion  Accord (the  "Accord") of the American Bar  Association
Section of Business Law (1991). As a consequence,  such opinion shall be subject
to a number of qualifications,  exceptions, definitions, limitations on coverage
and other  limitations,  all as more particularly  described in the Accord,  and
such counsel's opinion should be read in conjunction therewith. The term "actual
knowledge" when used in such counsel's  opinion shall have the meaning set forth
in the Accord. For purposes of the opinion in (e) above, Subject Laws shall mean
the Maryland General  Corporation Law, the Delaware General Corporation Law, the
Financial  Institutions  Article  of the  Annotated  Code of  Maryland,  and the
Exchange Act, and the rules and regulations promulgated thereunder.


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                                                                     APPENDIX XI

                 FORM OF OPINION OF COUNSEL TO COLUMBIA BANCORP

          (a) Columbia  Bancorp has been duly organized and is validly  existing
as a corporation under the laws of the State of Maryland,  and Columbia Bank has
been duly organized and is validly existing as a banking  institution  under the
laws of the State of Maryland.

          (b) The  execution  and  delivery  of the  Plan and the  Stock  Option
Agreement by Columbia  Bancorp and the  consummation by Columbia  Bancorp of the
transactions  provided for therein have been duly  authorized  by all  requisite
corporate  (including  stockholder)  action  on the  part of  Columbia  Bancorp.
Columbia Bancorp has the corporate power and corporate  authority to execute and
deliver  the  Plan  and  the  Stock  Option  Agreement  and  to  consummate  the
transactions contemplated thereby.

          (c) The Plan and the Stock  Option  Agreement  have been  executed and
delivered by Columbia Bancorp and are valid and binding  obligations of Columbia
Bancorp,  enforceable  against  Columbia Bancorp in accordance with their terms,
except to the extent that enforcement  thereof may be limited by (i) bankruptcy,
insolvency, moratorium, reorganization,  receivership,  conservatorship or other
similar  laws  now  or  hereinafter  in  effect  relating  to or  affecting  the
enforcement of creditors' rights generally or the rights of creditors of insured
depository  institutions or their holding companies and (ii) general  principles
of  equity,  regardless  of  whether  such  enforceability  is  considered  in a
proceeding at law or in equity.

          (d) The execution, delivery and performance by Columbia Bancorp of the
Plan and the Stock  Option  Agreement  do not  violate the Charter or By-Laws of
Columbia Bancorp.

          (e) No consent or approval of, or other action by or filing with,  any
court or administrative or governmental body which has not been obtained,  taken
or made is required  under the Subject  Laws (as  defined  below),  or any court
order or judgment specifically  applicable to Columbia Bancorp and known to such
counsel,  for  Columbia  Bancorp to execute  and  deliver the Plan and the Stock
Option Agreement and to consummate the transactions  provided for therein.  Such
counsel  need express no opinion,  however,  as to any such  consent,  approval,
action or filing  which may be required  as the result of  Suburban  Bancshares'
involvement in the  transactions  contemplated  by the Plan and the Stock Option
Agreement  because of such  entities'  legal or regulatory  status or because of
other facts specifically pertaining to Suburban Bancshares.

          (f)  Assuming  due  authorization  of the  Holding  Company  Merger by
Suburban Bancshares and the Suburban Bancshares stockholders, upon the filing of
an  Agreement  and  Articles  of Merger  with and  acceptance  for record by the
Maryland State Department of Assessments and Taxation and the Delaware Secretary
of State in  accordance  with the  Plan,  the  Holding  Company  Merger  will be
effective in accordance  with the laws of the State of Maryland and of the State
of Delaware.



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          (g) Assuming due authorization of the Bank Merger by Suburban Bank and
the Suburban Bank stockholders,  upon issuance of a Certificate of Merger by the
Maryland  Commissioner of Financial  Institutions and the filing of an Agreement
of Bank Merger and the  Certificate  of Merger with and acceptance for record by
the Maryland State Department of Assessments and Taxation in accordance with the
Plan, the Bank Merger will be effective in accordance with the laws of the State
of Maryland.

          (h) The Columbia  Bancorp Common Stock to be issued in connection with
the Holding  Company  Merger in accordance  with Section 9.2 of the Plan is duly
reserved for issuance,  and when so issued,  will be duly authorized and validly
issued,  fully paid and non-assessable,  free of preemptive rights, and free and
clear of all liens,  encumbrances or restrictions created by or through Columbia
Bancorp.

          (i) The  Registration  Statement of Columbia Bancorp has been declared
effective by the SEC under the  Securities  Act and, to our  knowledge,  no stop
order suspending the effectiveness of the Registration Statement has been issued
under the Securities Act or proceedings  therefor initiated or threatened by the
SEC.

          (j) The terms and  provisions  of the  Columbia  Bancorp  Common Stock
conform to the description thereof contained in the Proxy  Statement/Prospectus.
The form of stock certificate used to evidence the Columbia Bancorp Common Stock
is in due and proper form.

          (k) The Proxy Statement/Prospectus,  insofar as it constitutes a final
prospectus  under the Securities Act and a definitive  proxy statement under the
Exchange  Act for the  special  meeting  (the  "Special  Meeting")  of  Columbia
Bancorp's  stockholders held on ________________,  1999, as of the date thereof,
complied  as to  form  in  all  material  respects  to the  requirements  of the
Securities Act and the Exchange Act, and the rules and  regulations  promulgated
thereunder,  except  that such  counsel  need  express  no opinion as to (i) the
financial  statements,  schedules and other  financial,  statistical and tabular
data included in or incorporated  into the Registration  Statement and the Proxy
Statement/Prospectus,  (ii) any  document  incorporated  by  reference  into the
Registration Statement and the Proxy Statement/Prospectus, (iii) the exhibits to
any document  incorporated by reference into the Registration  Statement and the
Proxy Statement/Prospectus,  or (iv) information relating to Suburban Bancshares
or the Suburban  Subsidiaries  which was included in the Registration  Statement
and the Proxy  Statement/Prospectus.  In addition,  such counsel need not assume
any responsibility for the accuracy,  completeness or fairness of the statements
contained in the Registration  Statement and the Proxy  Statement/Prospectus  or
any  documents  incorporated  by  reference  therein  except as set forth in the
paragraph immediately following this one.

     In  connection  with  the  Mergers,   such  counsel  shall  state  that  it
participated in conferences with certain officers and other  representatives  of
Columbia  Bancorp and the  Columbia  Subsidiaries  at which the  contents of the
Registration  Statement and the Proxy  Statement/Prospectus  and related matters
were  discussed  and,  although  such  counsel is not passing  upon and does not
assume any  responsibility  for the accuracy,  fairness or  completeness  of the


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statements   contained   in   the   Registration   Statement   and   the   Proxy
Statement/Prospectus  and has made no independent  check or  verification of the
existence  or  absence  of any  matter  set forth  therein,  on the basis of the
foregoing,  such  counsel  shall state that no facts have come to its  attention
which  leads  it to  believe  that  the  Registration  Statement  and the  Proxy
Statement/Prospectus  as of the date of the  effectiveness  of the  Registration
Statement  and through the  Effective  Date  contained an untrue  statement of a
material fact or omitted to state a material fact required to be stated  therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading,  except that such counsel need not express
any belief with respect to (i) the  financial  statements,  schedules  and other
financial,  statistical  and tabular data included in or  incorporated  into the
Registration  Statement  and the Proxy  Statement/Prospectus,  (ii) the exhibits
thereto and the exhibits to any  document  incorporated  by  reference  into the
Registration Statement and the Proxy  Statement/Prospectus,  (iii) the documents
incorporated by reference therein, or (iv) any information  relating to Suburban
Bancshares or the Suburban  Subsidiaries  contained  therein.  In rendering such
statement,  such counsel may state that it has served only as special counsel to
Columbia Bancorp and the Columbia Subsidiaries, that such representation of such
entities has been limited to acting as their special counsel with respect to the
Mergers and on certain  other  unrelated  matters on which such counsel has been
consulted by the  management of Columbia  Bancorp or the Columbia  Subsidiaries,
and that such  counsel has relied  solely  upon the  examination  and  inquiries
stated therein.

     In  rendering  such  opinion,   such  counsel  may,   without   independent
verification, assume: (i) the genuineness of all signatures and the authenticity
of all  documents  submitted to such counsel as  originals,  the  conformity  to
original  documents of all  documents  submitted  to such counsel as  certified,
conformed or reproduction copies, and the authenticity of such originals of such
latter  documents;  (ii) the  execution  of such  documents,  acknowledgment  as
indicated thereon and receipt of the  consideration  recited therein by Suburban
Bancshares,  (iii) that Suburban  Bancshares  has the full power,  authority and
legal right under its articles of  incorporation  and other governing  documents
and  applicable  laws,  as the  case  may be,  to  execute  and to  perform  its
obligations  under  all  documents   executed  by  it  in  connection  with  the
transactions  contemplated by the Plan and the Stock Option Agreement; (iv) that
the foregoing documents, in the forms submitted to such counsel for review, have
not been altered or amended in any respect material to such counsel's opinion as
stated herein;  (v) that there are no other agreements or  understandings  among
the parties  that would  modify the terms of the  proposed  transactions  or the
respective rights or obligations of the parties thereunder; (vi) the accuracy of
the  representations  and  warranties  of  Columbia  Bancorp  and  the  Columbia
Subsidiaries as set forth in the Plan; (vii) the accuracy of all  certifications
made  available to such counsel from public  officials  and officers of Columbia
Bancorp  and the  Columbia  Subsidiaries  on which  such  counsel  is relying in
rendering the opinions set forth above;  and (viii) the validity of all laws and
regulations  applicable  to the  transactions  contemplated  by the Plan and the
Stock Option Agreement.

     Furthermore,  to the extent not  inconsistent  with the other  assumptions,
qualifications  and  limitations  set  forth  in such  counsel's  opinion,  such
counsel's  opinion shall be governed by, and shall be  interpreted in accordance


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with, the Legal Opinion  Accord (the  "Accord") of the American Bar  Association
Section of Business Law (1991). As a consequence,  such opinion shall be subject
to a number of qualifications,  exceptions, definitions, limitations on coverage
and other  limitations,  all as more particularly  described in the Accord,  and
such counsel's opinion should be read in conjunction therewith. The term "actual
knowledge" when used in such counsel's  opinion shall have the meaning set forth
in the Accord. For purposes of the opinion in (e) above, Subject Laws shall mean
the Bank Holding  Company Act of 1956, the General  Corporation Law of Maryland,
the Financial  Institutions  Article of the Annotated Code of Maryland,  and the
Exchange Act, and the rules and regulations promulgated thereunder.



                                      105
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                                                                    APPENDIX XII

     AMENDMENTS TO THE BY-LAWS OF COLUMBIA BANCORP


     SECTION  2.04  Qualification.  No  person  shall  stand for  election  as a
director  who  would be 70 years of age on or  before  the date of the  election
(with no age limit in the case of any person who is serving as the  Chairman  of
the  Board,  the  Vice-Chairman  of the  Board,  the  chairman  of any  standing
committee of the Board of Directors or the President  just prior to his election
or in the case of Albert W. Turner).

     SECTION 4.01.  Executive and Other Officers.  The Corporation  shall have a
President,  a Secretary,  and a Treasurer who shall be the executive officers of
the  Corporation.  It may also have a Chairman of the Board; the Chairman of the
Board  shall be an  executive  officer if he or she is  designated  as the chief
executive officer of the Corporation. Provided the Corporation has a Chairman of
the Board it may also have a Vice  Chairman of the Board.  The Vice  Chairman of
the Board shall not be an executive officer of the Corporation.  The Corporation
may also  have a  Chairman  of the  Executive  Committee.  The  Chairman  of the
Executive  Committee shall not be an executive  officer of the Corporation.  The
Board of Directors  may designate  who shall serve as chief  executive  officer,
having general supervision of the business and affairs of the Corporation, or as
chief  operating   officer,   having   supervision  of  the  operations  of  the
Corporation;  in the absence of designation  the President  shall serve as chief
executive  officer  and chief  operating  officer.  It may also have one or more
Vice-Presidents,   assistant  officers,  and  subordinate  officers  as  may  be
established by the Board of Directors. A person may hold more than one office in
the Corporation  except that no person may serve  concurrently as both President
and  Vice-President  nor Chairman of the Board and Vice Chairman of the Board of
the Corporation.  The Chairman of the Board, the Vice Chairman of the Board, the
Chairman of the Executive  Committee and the President  shall be directors;  the
other officers may be directors.

     SECTION  4.04.  Chairman of the  Executive  Committee.  The Chairman of the
Executive  Committee,  if one be elected,  shall  preside at all meetings of the
Executive  Committee  of the  Board of  Directors  at  which he or she  shall be
present;  and, in general,  he or she shall  perform all such duties as are from
time to time assigned to him or her by the Board of Directors.

     [The remaining sections in Article IV shall be renumbered.]

     SECTION  4.11 4.10.  Election,  Tenure and  Removal of the  Chairman of the
Board,  and the Vice  Chairman of the Board and the  Chairman  of the  Executive
Committee. The Board of Directors shall elect the Chairman of the Board, and the
Vice Chairman of the Board and the Chairman of the Executive  Committee,  if any
be elected.  The Chairman of the Board,  and the Vice  Chairman of the Board and
the  Chairman  of the  Executive  Committee  shall be  appointed  to hold  their
offices,  respectively,  for two years, but not beyond their respective terms as
directors.  The Board of Directors may remove the Chairman of the Board, and the


                                      106
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Vice  Chairman of the Board and the  Chairman of the  Executive  Committee  from
their  respective  office at any time.  The removal of the Chairman of the Board
and/or the Vice  Chairman  of the Board  and/or the  Chairman  of the  Executive
Committee does not prejudice  his/their  rights as a director and stockholder of
the Corporation  conveyed by the Charter and By-Laws of the Corporation or under
any employment agreement.



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                                                                   APPENDIX XIII

                   AMENDMENTS TO THE BY-LAWS OF COLUMBIA BANK


     SECTION 2.04. Qualification.  Each of the directors shall own in good faith
and of record  unencumbered  shares of capital  stock of the Trust  Company or a
corporation  that owns more than 80% of the capital stock of the Trust  Company.
The unencumbered capital stock which the director owns shall be in the amount of
at least $500.  To determine the amount of capital stock owned by a director the
par  value,  market  value or book  value of Common  Stock and  Preferred  Stock
(determined  at the  date of  purchase  or the  date  of  becoming  a  director,
whichever  value is the greater) may be considered  and debt  instruments of the
Trust  Company may not be  considered.  No person  shall stand for  election who
would be 70  years of age on or  before  the date of the  election  (WITH NO AGE
LIMIT IN THE CASE OF ANY PERSON WHO IS SERVING AS THE CHAIRMAN OF THE BOARD, THE
VICE-CHAIRMAN OF THE BOARD, THE CHAIRMAN OF ANY STANDING  COMMITTEE OF THE BOARD
OF  DIRECTORS  OR THE  PRESIDENT  JUST PRIOR TO HIS  ELECTION  OR IN THE CASE OF
ALBERT W. TURNER).

     SECTION 4.01. Executive and Other Officers.  The Trust Company shall have a
President,  a Secretary,  and a Treasurer who shall be the executive officers of
the Trust Company. It may also have a Chairman of the Board; the Chairman of the
Board shall be an executive  officer if he is designated as the chief  executive
officer of the Trust  Company.  Provided the Trust Company has a Chairman of the
Board it may also have a Vice  Chairman of the Board.  The Vice  Chairman of the
Board shall not be an executive officer of the Trust Company.  The Trust Company
may also  have a  Chairman  of the  Executive  Committee.  The  Chairman  of the
Executive Committee shall not be an executive officer of the Trust Company.  The
Board of Directors  may designate  who shall serve as chief  executive  officer,
having general  supervision of the business and affairs of the Trust Company, or
as chief operating  officer,  having  supervision of the operations of the Trust
Company;  in the  absence of  designation  the  President  shall  serve as chief
executive officer and chief operating officer. It may also have one or more Vice
Presidents,  assistant officers,  and subordinate officers as may be established
by the Board of  Directors.  A person may hold more than one office in the Trust
Company but may not serve  concurrently as both President and Vice President nor
Chairman of the Board and Vice Chairman of the Board of the Trust  Company.  The
Chairman  of the Board,  the Vice  Chairman  of the Board,  the  Chairman of the
Executive Committee and the President shall be directors; the other officers may
be directors.

     SECTION  4.04.  Chairman of the  Executive  Committee.  The Chairman of the
Executive  Committee,  if one be elected,  shall  preside at all meetings of the
Executive  Committee  of the  Board of  Directors  at  which he or she  shall be
present;  and, in general,  he or she shall  perform all such duties as are from
time to time assigned to him or her by the Board of Directors.

     [The remaining sections in Article IV shall be renumbered.]



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     SECTION  4.11 4.10.  Election,  Tenure and  Removal of the  Chairman of the
Board,  and the Vice  Chairman of the Board and the  Chairman  of the  Executive
Committee. The Board of Directors shall elect the Chairman of the Board, and the
Vice Chairman of the Board and the Chairman of the Executive  Committee,  if any
be elected.  The Chairman of the Board,  and the Vice  Chairman of the Board and
the  Chairman  of the  Executive  Committee  shall be  appointed  to hold  their
offices,  respectively,  for two years, but not beyond their respective terms as
directors.  The Board of Directors may remove the Chairman of the Board, and the
Vice  Chairman of the Board and the  Chairman of the  Executive  Committee  from
their  respective  office at any time.  The removal of the Chairman of the Board
and/or the Vice  Chairman  of the Board  and/or the  Chairman  of the  Executive
Committee does not prejudice  his/their  rights as a director and stockholder of
the Trust  Company  conveyed by the Charter and By-Laws of the Trust  Company or
under any employment agreement.


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                                                                    APPENDIX XIV

                       COLUMBIA BANCORP AND COLUMBIA BANK
                   BOARD AND EXECUTIVE OFFICER ASSIGNMENTS AT
                               THE EFFECTIVE DATE



Designated Directors of Columbia Bancorp:

     Name                           Class           Designated by

     Winfield M. Kelly, Jr.         2002            Suburban Bancshares
     Albert W. Turner               2002            Suburban Bancshares
     Lawrence A. Shulman            2001            Suburban Bancshares
     Vincent D. Palumbo             2001            Suburban Bancshares
     Kenneth H. Michael             2000            Suburban Bancshares

     The other 17  directors  will  be  those  persons  serving  as directors of
     Columbia  Bancorp at the time of  the Effective Date  and will  continue to
     serve in their respective classes.

Designated Directors of Columbia Bank:

     Name                           Class           Designated by

     Winfield M. Kelly, Jr.         2000            Suburban Bancshares
     Albert W. Turner               2000            Suburban Bancshares
     Lawrence A. Shulman            2000            Suburban Bancshares
     Vincent D. Palumbo             2000            Suburban Bancshares
     Kenneth H. Michael             2000            Suburban Bancshares

     The  other  17  directors  will be  those  persons  serving as directors of
     Columbia Bank at the time of the  Effective Date and will continue to serve
     until 2000.

Designated  titles  (director  titles and executive  officer titles) of Columbia
Bancorp:

     Name                             Title

     Director Titles:
     Winfield M. Kelly, Jr.           Chairman of the Board
     James R. Moxley, Jr.             Vice Chairman of the Board
     Herschel L. Langenthal           Chairman of the Executive Committee

     Executive Officer Titles:
     John M. Bond, Jr.                President, Chief Executive Officer, and
                                      Treasurer
     John A. Scaldara, Jr.            Executive Vice President, Chief Financial
                                      Officer, and Secretary



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<PAGE>

Designated  titles  (director  titles and executive  officer titles) of Columbia
Bank:

     Name                             Title

     Director Titles:
     Winfield M. Kelly, Jr.           Chairman of the Board
     Herschel L. Langenthal           Chairman of the Executive Committee

     Executive Officer Titles:
     John M. Bond, Jr.                President, Chief Executive Officer, and
                                      Treasurer
     John A. Scaldara, Jr.            Executive Vice President, Chief Financial
                                      Officer, and Secretary
     Michael T. Galeone               Executive Vice President
     Robert W. Locke                  Executive Vice President
     Stephen A. Horvath               Executive Vice President/Washington Region
     Head

Additional Contract Employee of Columbia Bancorp:

     Name

     New Employment Agreement:
     Winfield M. Kelly, Jr.

Additional Contract Employees of Columbia Bank:

     Name

     New Employment Agreement:
     Winfield M. Kelly, Jr.
     Stephen A Horvath

     Assumption of Existing Severance Agreement:
     Harold J. Koch
     Joseph E. Burnett
     Cesar O. Cabrejas
     Sibyl S. Malatras


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                                                                     APPENDIX XV

                       BOARD CHAIRMAN'S SERVICES AGREEMENT


     THIS SERVICE  AGREEMENT  (hereinafter  this "Agreement") is entered into on
this ____ day of ____________________, by and between:

     (1)  Winfield M. Kelly, Jr.
          12404 Pleasant Prospect Road
          Mitchellville, Maryland 20721

(hereinafter "Kelly") and

     (2)  Columbia Bancorp
          9171 Baltimore National Pike
          Ellicott City, Maryland  21042

(hereinafter  "Columbia  Bancorp"),  and  its  subsidiary,   The  Columbia  Bank
(hereinafter "Columbia Bank").

                              W I T N E S S E T H:

     WHEREAS,  Columbia Bancorp desires to provide to Kelly and Kelly desires to
receive from Columbia  Bancorp a continuing  services  agreement so as to retain
and secure  Kelly's  services as Chairman of the Board of  Directors of Columbia
Bancorp and Chairman of the Board of Directors of Columbia Bank,  upon the terms
and conditions set forth in this Agreement.

     NOW  THEREFORE,  the  parties,  intending  to be  legally  bound,  agree as
follows:

     1.  Definitions.  As used in this  Agreement,  the following terms have the
meanings set forth below:

          (a) Commencement Date. _________________.

          (b)  Bank  Regulatory  Agency.  As  used  in  this  Agreement,   "Bank
Regulatory  Agency" shall mean any governmental  authority,  regulatory  agency,
ministry, department,  statutory corporation,  central bank or other body of the
United  States  or of any  other  country  or of any  state or  other  political
subdivision  of any of them having  jurisdiction  over  Columbia  Bancorp or any
transaction  contemplated,  undertaken  or proposed to be undertaken by Columbia
Bancorp hereunder or otherwise.  Bank Regulatory  Agency shall include,  but not
necessarily be limited to:

               (1) The Federal Deposit  Insurance  Corporation or any other
     federal or state depository insurance organization or fund; and



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<PAGE>

               (2) The  Federal  Reserve  System,  the  Comptroller  of the
     Currency, The Maryland Division of Financial Regulation,  or any other
     federal or state bank regulatory or commissioner's office; and

               (3) The Resolution Trust Corporation, the Resolution Funding
     Corporation,  the Financing  Corporation  or any other entity  created
     pursuant  to  The   Financial   Institutions   Reform,   Recovery  and
     Enforcement Act of 1989, as amended from time to time; and

               (4) Any corporation, bridge bank, fund association, or other
     entity  established,  organized,  owned  (in  whole  or  in  part)  or
     controlled by any of the foregoing; and

               (5) Any predecessor, successor or assignee of the foregoing.

     2. Term.

          (a)  Initial  Term.  Except as  provided  for below  under  "Rights to
Terminate  Agreement",  the Initial Term of this Agreement shall expire upon the
expiration of Kelly's current term as a director of Columbia Bancorp.

               (1) Renewals and Extensions;  Subsequent Annual Terms. After
     the Initial Term of this Agreement, this Agreement shall automatically
     renew with the  reelection  of Kelly as BOARD  CHAIRMAN in  accordance
     with  Columbia  Bancorp's  and  Columbia  Bank's  By-Laws and Charter,
     unless:

                    (A) Kelly provides notice to Columbia  Bancorp and
          Columbia Bank at least on or before the end of any term that
          he does not wish to renew  the  contract  for an  additional
          annual term,  in which event this  Agreement  will expire at
          the end of the  contract  term in  which  Kelly  gives  such
          notice to Columbia Bancorp and Columbia Bank; or

                    (B) Kelly fails to be reelected as BOARD  CHAIRMAN
          in accordance  with Columbia  Bancorp's and Columbia  Bank's
          By-Laws and Charter.

     3. Duties and Authority of Kelly.

          (a) Performance of Services. Kelly shall discharge his duties as Board
Chairman to the best of his  ability  for and on behalf of Columbia  Bancorp and
Columbia Bank. Kelly shall comply with all laws, statutes, ordinances, rules and
regulations  relating  to his  services  and  duties.  During  the  term of this
Agreement, Kelly shall not at any time or place directly or indirectly engage or
agree to engage in any business or practice related to the banking business with
or for any other  person or entity to any extent  whatsoever,  other than to the
extent required by the terms and conditions of this Agreement.



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<PAGE>

          (b)  Constructive  Termination.  Excepting any action  precipitated by
reason of regulatory requirements as provided in Section 5(b) below, substantial
curtailment of the duties and authority of Kelly as Board Chairman  hereunder by
Columbia Bancorp and Columbia Bank shall constitute a termination  without cause
in breach of this Agreement.

     4. Payment Amount; Terms. As full compensation for all services rendered to
Columbia  Bancorp and Columbia Bank pursuant to this Agreement and the covenants
contained  herein,  Columbia  Bancorp and  Columbia  Bank shall pay to Kelly the
following:

          (a)  Base   Compensation.   Kelly's  base   compensation   (the  "Base
Compensation")  shall be $60,000 per annum.  The Board of Directors shall review
such base  compensation  at least  annually  and may grant such raises as in its
discretion are deemed warranted.

               (1) Base  Compensation  Rate.  Compensation  to begin on the
     Commencement Date at the above annual rate.

               (2) Method of Payment. Columbia Bancorp and/or Columbia Bank
     shall pay Kelly's said base compensation in equal monthly installments
     or ----------------- more frequently.

          (b) Vacation and Leave.  Kelly shall be entitled to such  vacation and
leave as may be provided  for under the current  and future  leave and  vacation
policies of Columbia Bancorp and Columbia Bank for executive officers.

          (c) Office Space.  Columbia Bancorp will provide  customary  executive
office space and executive office support to Kelly beginning on the Commencement
Date.

          (d) D & O Insurance.  Columbia  Bancorp and Columbia Bank will provide
Kelly  with  directors  and  officers  liability  insurance  coverage  on  terms
comparable  to that  provided to Columbia  Bancorp's  and Columbia  Bank's other
officers and directors.

          (e) Additional Compensation. Upon the earlier to occur of (i) any sale
or exchange of stock in Columbia Bancorp with any third party which results in a
change in a controlling  interest of Columbia  Bancorp,  or (ii) five years from
the Commencement Date, Columbia Bancorp shall thereupon immediately pay to Kelly
the sum of  $200,000  as  additional  compensation  to  Kelly or his  heirs.  In
addition, in the event Columbia is required to pay such additional  compensation
as a result of a change in a controlling interest of Columbia Bancorp and such a
change in a controlling  interest occurs prior to the time when Kelly shall have
become fully vested in any stock option plan established for his benefit,  Kelly
shall thereupon also become immediately vested in all options theretofore issued
to him or accrued to his benefit. For purposes of construing the foregoing,  the
term  "change  in a  controlling  interest"  shall be  defined  as  provided  in
applicable Federal Reserve Board regulations.



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<PAGE>

     5. Rights to Terminate Agreement.

          (a) Breach or Default Under Agreement. Either party may terminate this
Agreement for breach or default as provided hereinbelow.

          (b)  Termination  Without  Cause/Severance.  Kelly may terminate  this
Agreement in accordance with Paragraph  2(a)(1)(A),  above. Columbia Bancorp and
Columbia  Bank  may  terminate  this  Agreement  in  accordance  with  Paragraph
2(a)(l)(B),  above.  Otherwise,  if Kelly is not in  breach or  default  of this
Agreement and Columbia Bancorp or Columbia Bank terminates  Kelly's services for
any reason and under any procedures other than those specified in paragraph (c),
below, then Columbia Bancorp or Columbia Bank shall thereupon immediately pay to
Kelly the sum of $120,000 as  severance  compensation  to Kelly;  being equal to
twice his Base  Compensation  for a 12 month  period.  In addition,  should such
termination occur prior to the time when Kelly shall have become fully vested in
any stock option plan  established  for his benefit,  Kelly shall thereupon also
become immediately vested in all options theretofore issued to him or accrued to
his benefit.

          (c) Termination of Kelly With Cause; Procedure.

               (1)  Termination of  Compensation.  If Columbia  Bancorp and
     Columbia  Bank  terminates  Kelly  for  cause  as set  forth  in  this
     paragraph,  then the compensation  payments  provided for herein shall
     cease.

               (2) Definition of Cause. Under this Agreement, "cause" shall
     be defined to be:

                    (A) Any willful act or action on the part of Kelly
          done in  connection  with or  associated  with the  services
          rendered by Kelly under this  Agreement for which a criminal
          prosecution (other than traffic and misdemeanor  actions) is
          commenced by the prosecuting authorities in the jurisdiction
          in which such act or action  occurred.  For the  purposes of
          this Agreement,  the commencement of a criminal  prosecution
          shall  be  deemed  to have  occurred  upon the  filing  of a
          criminal  information  against  Kelly or the  indictment  of
          Kelly by any local, state or federal authority.

                    (B)  Any act of  theft,  fraud,  deceit,  material
          misrepresentation,  assault  or  battery  done by  Kelly  in
          connection with or associated with the services  rendered by
          Kelly to  Columbia  Bancorp  or  Columbia  Bank  under  this
          Agreement.

                    (C) Any act,  action,  failure to act or  omission
          which  constitutes  gross  misconduct or gross negligence in
          connection with or associated with the services  rendered by
          Kelly under this Agreement,  provided that the procedures of
          paragraph 5(c)(3) are followed.



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<PAGE>

                    (D) Any  termination  following  a default of this
          Agreement by Kelly,  pursuant to the provisions of Paragraph
          10 below.

                    (E) Any Bank Regulatory Agency action with respect
          to this  Agreement,  or any  failure  of this  Agreement  to
          comply with any Bank Regulatory Agency requirements.

               (3) Procedure for Termination  With Cause. The procedure for
     termination with cause shall be as follows:

                    (A)  For  any  reason   specified   in   paragraph
          5(c)(2)(A),  Kelly shall be terminated upon the commencement
          of  prosecution,  as of the  date of the act to  which  that
          paragraph applies.

                    (B)  For  any  reason   specified  in   Paragraphs
          5(c)(2)(B),  5(c)(2)(C),  5(c)(2)(D) or  5(c)(2)(E),  unless
          ordered by or agreed to differently between Columbia Bancorp
          and/or  Columbia  Bank,  and a Bank  Regulatory  Agency,  or
          unless a criminal  prosecution  has commenced as provided in
          Paragraphs 5(c)(2)(A) and 5(c)(3)(A) above, Columbia Bancorp
          and/or  Columbia Bank shall give Kelly written notice of the
          cause alleged to be the basis for Kelly's termination. Kelly
          shall  thereafter  have a period of 30 days from the date of
          the receipt of Columbia  Bancorp's  and/or  Columbia  Bank's
          written  notice  in  which to  dispute  and/or  explain  the
          situation(s)   referred  to  in  Columbia  Bancorp's  and/or
          Columbia Bank's written noticed,  including, if appropriate,
          a response to Bank  Regulatory  Agencies.  If Kelly does not
          respond to Columbia Bancorp's and/or Columbia Bank's notice,
          Kelly shall be deemed to have  agreed to Columbia  Bancorp's
          and/or Columbia  Bank's and/or the Bank Regulatory  Agency's
          allegations and the termination shall be effective as of the
          date of Columbia  Bancorp's  and/or  Columbia Bank's written
          notice.  If Kelly  disputes  the  allegations  contained  in
          Columbia  Bancorp's  and/or  Columbia Bank's and/or the Bank
          Regulatory  Agency's  notice,  Kelly shall  notify  Columbia
          Bancorp  and/or  Columbia  Bank in  writing  within the time
          period set forth above and Columbia  Bancorp and/or Columbia
          Bank and Kelly  shall set a meeting to discuss a  resolution
          of the dispute.  If the parties  and/or any Bank  Regulatory
          Agency do not reach  agreement  as to  Kelly's  termination,
          within 45 days of Columbia  Bancorp's and/or Columbia Bank's
          notice, Columbia Bancorp and/or Columbia Bank, by a majority
          of its Board of Directors, shall have the right to terminate
          Kelly and to discontinue the compensation payments to Kelly.
          If Kelly  nevertheless  still disagrees that his termination
          was proper under the terms of this  Agreement,  both parties
          hereto by their  execution  hereof agree,  unless  otherwise
          ordered  by  or  agreed  to  differently  between  any  Bank
          Regulatory Agency and Columbia Bancorp and/or Columbia Bank,
          to  submit  to   binding   arbitration   under  the   rules,
          regulations  and  procedures  of  the  American  Arbitration
          Association.



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<PAGE>

          (d) Termination of Agreement by Kelly for Cause.  If Columbia  Bancorp
and/or  Columbia  Bank shall  become in breach or default of any of the material
provisions  hereof,   including  especially  any  constructive  termination  [as
provided in Paragraph 3(b),  above] and fails to cure such breach as provided in
Paragraph 10, below, then Kelly may, at his option at any time thereafter, elect
to  terminate  this  Agreement  for cause,  in which event  Columbia  Bancorp or
Columbia  Bank shall  thereupon  immediately  pay to Kelly the sum of $60,000 as
severance  compensation to Kelly;  being equal to his Base Compensation for a 12
month period. In addition,  should such termination occur prior to the time when
Kelly shall have become fully vested in any stock  option plan  established  for
his benefit, Kelly shall thereupon also become immediately vested in all options
theretofore issued to him or accrued to his benefit.

          (e) Death or  Disability.  If Kelly  should be unable to  perform  his
professional  duties  due to  disability,  then the  compensation  provided  for
hereinabove shall continue at its full level for a period not to exceed 120 days
and, if the  disability  is temporary,  shall resume upon Kelly's  return to his
duties  hereunder.  In the event of Kelly's death,  such  compensation  payments
shall cease.

          (f) Survival of  Restrictions.  In the event of a  termination  of the
offer set forth in this  Agreement,  or in the  event of a  termination  of this
Agreement  after  acceptance  hereof by Kelly,  all covenants  and  restrictions
contained  herein shall survive the termination and shall continue in full force
and effect as provided for herein.

     6.  Representations  and Warranties of Kelly. Kelly represents and warrants
to Columbia Bancorp and Columbia Bank the following:

          (a)  Information  Supplied to Columbia  Bancorp and Columbia Bank. All
information  and  data,  including  but not  limited  to,  personal  data,  work
histories,  salaries and responsibilities,  represented and provided to Columbia
Bancorp and Columbia Bank by Kelly in his application for the position  provided
for  herein  are true and  correct in all  material  respects  and Kelly has not
stated any facts or  circumstances,  nor has he failed to disclose  any facts or
circumstances to Columbia Bancorp and Columbia Bank the statement or omission of
which would cause Kelly's  application to be false or misleading in any material
respect.

          (b)  Prior  Agreements.  Kelly  is not now a party  to or bound by any
employment, consulting or other type of agreement, nor has he been a party to or
bound by any such agreement, which would be breached by, or of which Kelly would
be in default,  by virtue of any  provision  contained  in this  Agreement  with
Columbia  Bancorp and Columbia  Bank, nor is Kelly a party to any such agreement
which  would  compete  with or  constitute  a  conflict  of  interest  with this
Agreement and Kelly's duties and  obligations  to Columbia  Bancorp and Columbia
Bank.

          (c) Bank Regulatory Agency Approval. To the best of Kelly's knowledge,
information and belief, there are no facts or circumstances contained in Kelly's
personal  or  professional  history  which are likely to, or which in fact will,
cause any Bank Regulatory  Agency having  jurisdiction  over Columbia Bancorp or


                                      117
<PAGE>

Columbia Bank to withdraw, suspend or substantially modify its approval of Kelly
as BOARD CHAIRMAN of Columbia Bancorp or Columbia Bank.

     7. Representations and Warranties of Columbia Bancorp and Columbia Bank.

          To the best of  Columbia  Bancorp's  and  Columbia  Bank's  knowledge,
information and belief,  there are no facts or  circumstances  to which Columbia
Bancorp or Columbia  Bank is privy,  which are likely to, or which in fact will,
cause any Bank Regulatory  Agency having  jurisdiction  over Columbia Bancorp or
Columbia Bank to withdraw, suspend or substantially modify its approval of Kelly
as BOARD CHAIRMAN of Columbia Bancorp and Columbia Bank.

     8. Restrictive Covenants.

          (a) Proprietary  Information.  Kelly acknowledges that upon acceptance
of this Agreement, Kelly will be making use of, acquiring and adding to Columbia
Bancorp's and Columbia  Bank's  confidential  and  proprietary  information of a
special and unique nature and value relating to such matters as, but not limited
to  Columbia  Bancorp's  and  Columbia  Bank's  business  operations,   internal
structure, financial affairs, programs, software, systems, procedures,  manuals,
confidential  reports,  and sales and marketing methods,  as well as the amount,
nature  and type of  services,  equipment  and  methods  used and  preferred  by
Columbia  Bancorp's and Columbia Bank's suppliers,  and customers,  all of which
shall be deemed to be confidential  information.  Kelly  acknowledges  that such
confidential  information has been and will continue to be of central importance
to the business of Columbia  Bancorp and Columbia Bank and that disclosure of it
or its use by others  could  cause  substantial  loss to  Columbia  Bancorp  and
Columbia Bank. In  consideration  of his  anticipated  and thereafter  continued
contract with Columbia Bancorp and Columbia Bank, upon acceptance hereof,  Kelly
agrees that during the entire term of this Agreement,  and upon and for a period
of two years  after such term,  Kelly  shall not,  for any  purpose  whatsoever,
directly or indirectly,  divulge, reveal, report, publish, transfer, or disclose
to any person or entity any of such confidential  information which was obtained
by Kelly as a result of Kelly's  services to Columbia Bancorp and Columbia Bank,
nor shall  Kelly  reveal to any person or entity any trade  secrets of  Columbia
Bancorp or Columbia Bank, but Kelly shall hold all of the same  confidential and
inviolate. For purposes of construing the foregoing,  "proprietary  information"
shall not be construed to include information  generally available in the public
domain through sources other than Kelly.

          (b)  Property of Columbia  Bancorp or Columbia  Bank.  All  contracts,
agreements, forms, financial books, records, instruments and documents, supplier
lists, memoranda, data, reports, programs, software, tapes, rolodexes, telephone
and address  books,  letters,  research,  listings,  programming,  and any other
instruments,  records or documents relating or pertaining to Columbia Bancorp or
Columbia Bank  (hereinafter  referred to as "Records") shall at all times be and
remain the property of Columbia  Bancorp and Columbia Bank. Upon  termination or
expiration of the term of this Agreement for any reason whatsoever,  Kelly shall
return to Columbia  Bancorp or Columbia Bank all Records  (whether  furnished by


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<PAGE>

Columbia Bancorp,  by Columbia Bank, by a third party or prepared by Kelly), and
Kelly shall  neither make nor retain any copies of any such  Records  after such
termination.

          (c)  Inventions and  Creations.  All  inventions and other  creations,
whether or not  patentable or  copyrightable,  and all ideas,  reports and other
creative works,  including,  without limitation,  innovations,  manuals or other
materials,  made or  conceived  in whole or in part by Kelly  during the term of
this Agreement, which relate in any manner whatsoever to the business,  existing
or proposed of Columbia Bancorp, Columbia Bank or any other business or research
development  effort in which  Columbia  Bancorp  or any of its  subsidiaries  or
affiliates engages during the term of this Agreement, will be disclosed promptly
by  Kelly to  Columbia  Bancorp  and  Columbia  Bank  and  shall be the sole and
exclusive property of Columbia Bancorp and Columbia Bank.

          (d)  Non-Solicitation of Customers and Employees.  Kelly agrees during
the term of this Agreement and for a period of two years  immediately  following
the  expiration  of the term  hereof,  that he shall not for his  account  or on
behalf of any other person or legal entity, hire or solicit to hire any employee
of Columbia  Bancorp (or any of its affiliates or  subsidiaries)  or solicit the
banking  business  of any  person or  entity  known to him to be a  customer  of
Columbia Bancorp (or any of its affiliates or subsidiaries).

     9.  Indemnification.  Kelly agrees to indemnify and hold harmless  Columbia
Bancorp and  Columbia  Bank from and  against  any and all claims  made  against
Columbia  Bancorp  and  Columbia  Bank by any party by virtue  of  Kelly's  past
employment,  whether such claims are made by a past employer or by another party
with whom Kelly has dealt in the past.  Columbia Bancorp and Columbia Bank agree
to indemnify  and hold  harmless  Kelly from and against any and all claims made
against  Kelly  arising  directly or  indirectly  from any fact or matter  which
contradicts (or as alleged would  contradict) any  representation or warranty of
Columbia  Bancorp and Columbia  Bank  hereunder.  Promptly  after receipt of any
party hereto (the  "Indemnitee") of notice of any demand,  claim or circumstance
which,  or which with the lapse of time,  would or might give rise to a claim or
the  commencement  (or  threatened  commencement)  of any action,  proceeding pr
investigation  (an  "Asserted  Liability")  that  may  result  in  a  loss,  the
Indemnitee  shall give notice  thereof (the "Claims  Notice") to the other party
(the  "Indemnifying  Party").  The Claims  Notice  shall  describe  the Asserted
Liability in reasonable  detail,  and shall indicate the amount  (estimated,  if
necessary  and to the  extent  feasible)  of the  loss  that  has been or may be
suffered  by  the  Indemnitee.  The  Indemnifying  Party  may  elect  to  assume
responsibility  for and to compromise  or defend,  at its own expense and by its
own counsel (which counsel shall be reasonably  satisfactory to the Indemnitee),
any Asserted  Liability,  unless in the  reasonable  judgment of the  Indemnitee
there may be one or more legal defenses  available to it that are different from
or in addition to those available to the Indemnifying Party and,  therefore,  it
is advisable for the Indemnitee to be represented by separate counsel.  Then, in
such event,  the Indemnitee  shall have the right to employ separate  counsel to
represent it (which shall be reasonably satisfactory to the Indemnifying Party),
in which event the fees and  disbursements  of such counsel  shall be subject to
indemnification  hereunder.  If such Indemnifying  Party elects to compromise or
defend such  Asserted  Liability,  it shall  within 30 days (or  sooner,  if the
nature of the  Asserted  Liability  so requires)  notify the  Indemnitee  of its
intent to do so, and the  Indemnitee  shall have no further  liability  for such


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Asserted  Liability  but shall  cooperate,  at the  expense of the  Indemnifying
Party, in the compromise of, or defense against, such Asserted Liability. If the
Indemnifying  Party elects not to compromise  or defend the Asserted  Liability,
fails to notify the Indemnitee of its election as herein  provided,  or contests
its  obligation  to indemnify  under this  Agreement,  the  Indemnitee  may pay,
compromise or defend such Asserted  Liability.  Notwithstanding  the  foregoing,
neither the  Indemnifying  Party nor the Indemnitee may settle or compromise any
claim  over the  objection  of the other;  provided,  however,  that  consent to
settlement or compromise shall not be unreasonably  withheld.  In any event, the
Indemnitee and the Indemnifying Party may participate,  at their own expense, in
the defense of such Asserted  Liability.  If the  Indemnifying  Party chooses to
defend any claim, the Indemnitee shall make available to the Indemnifying  Party
any books,  records or other documents  within its control that are necessary or
appropriate for such defense.

     10. Right to Cure;  Default.  In the event either party shall be alleged to
be in breach of this Agreement, written notice shall be given by the other party
and a 10 day  opportunity  to cure  shall be  provided.  After  such 10 day cure
period,  if the breach is not cured and remains as alleged,  the breaching party
shall be deemed in default and this  Agreement  may be  terminated in the manner
provided in Paragraph 5, above.

     11. Entire Agreement. This Agreement represents the entire agreement of the
parties  relating to the services of Kelly. All prior  negotiations  between the
parties  are  merged  into this  Agreement  and there are no  understandings  or
agreements other than those incorporated herein.

     12. Miscellaneous.

          (a) Severability;  Court Enforcement.  The parties hereto covenant and
agree that to the extent any  provisions or portion of this  Agreement  shall be
held,  found or deemed to be  unreasonable,  unlawful or  unenforceable,  by any
Court of law, then the parties hereto expressly covenant and agree that any such
provision or portion thereof shall be modified to the extent  necessary in order
that any such provision or portion  thereof shall be legally  enforceable to the
fullest  extent  permitted  by  applicable  law and that any court of  competent
jurisdiction  shall,  and the parties hereto do hereby  expressly  authorize any
court of  competent  jurisdiction  to,  enforce  any such  provision  or portion
thereof or to modify any such provision  thereof shall be enforced by such court
to the fullest extent permitted by applicable law.

          (b) Waiver.  Columbia Bancorp and Columbia Bank and Kelly each reserve
the right to waive any of the terms of this  Agreement  which benefits the party
waiving same.  Any such waiver must be in a writing  signed by the party waiving
the same.

          (c) Choice of Law. It is the intention of the parties hereto that this
Agreement shall be governed by the laws of the State of Maryland. --------- ---



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<PAGE>

          (d) Successors. The terms of this Agreement shall inure to the benefit
of and be binding upon Columbia  Bancorp and Columbia Bank, their successors and
assigns,   and  upon  Kelly,  his  heirs,   guardians  and  personal  and  legal
representatives.

          (e) Gender.  The use of the masculine gender herein shall be deemed to
be or include the feminine gender, wherever appropriate.

          (f) Notices. All notices,  demands and other communications  hereunder
shall be in  writing  and shall be deemed to have been duly  given if  delivered
personally or if sent  registered or certified mail,  return receipt  requested,
properly addressed and postage prepaid to the addresses set forth hereinabove.

          (g)  Counterparts.  This  Agreement  may be  executed  in one or  more
counterparts,  each of which shall be deemed to be an original, but all of which
together shall constitute one and the same instrument.

          (h) Headings.  The Section and paragraph  headings used herein are for
convenience  and  reference  only and shall not  enter  into the  interpretation
hereof.

          (i)  Representation  by Counsel.  The parties hereto  acknowledge that
James J. Winn,  Jr.,  of the law firm of Piper & Marbury,  L.L.P.,  has acted as
counsel to Columbia Bancorp and Columbia Bank in this matter.



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     IN WITNESS  WHEREOF this Agreement has been executed by the  undersigned as
of the day and year first above written.

ATTEST/WITNESS:                         COLUMBIA BANCORP



- --------------------------------        By:------------------------------------
                                           President


                                        THE COLUMBIA BANK



- --------------------------------        By:-------------------------------------
                                           President




- --------------------------------        ----------------------------------------
                                           Winfield M. Kelly, Jr.


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                                                                    APPENDIX XVI

                              EMPLOYMENT AGREEMENT


     EMPLOYMENT AGREEMENT, dated as of __________________,  between THE COLUMBIA
BANK, a Maryland trust company and a principal subsidiary of COLUMBIA BANCORP, a
Maryland  corporation,  (the "Bank"), and Stephen A. Horvath. (the "Executive").
The  Employment  Agreement  dated as of  December  9, 1996,  between the Bank as
successor in interest to Suburban Bank of Maryland and the Executive,  is hereby
terminated effective with the execution of this Employment Agreement.

                              W I T N E S S E T H:

     The  Executive  will serve as the  Executive  Vice  President -  Washington
Region of the Bank and will  possess an intimate  knowledge  of the business and
affairs of the Bank. The Bank  recognizes the  Executive's  contribution  to the
organization  and its predecessor by merger,  Suburban Bank of Maryland,  growth
and success of the Bank and desire to enter into an  employment  agreement  with
the  Executive  in order to assure to the Bank the  benefits of the  Executive's
expertise and knowledge. The Executive, in turn, desires to enter into full-time
employment with the Bank on the terms provided herein.

     Accordingly,  in consideration of the mutual covenants and  representations
contained  herein and the mutual benefits derived  herefrom,  the parties hereto
agree as follows:

              1.      Full-Time Employment of Executive.

              1.1.Duties and Status.

                      (a) The Bank hereby  engages the  Executive as a full-time
              executive  employee  for  the  period  (the  "Employment  Period")
              specified  in  paragraph  4.1,  and  the  Executive  accepts  such
              employment,  on  the  terms  and  conditions  set  forth  in  this
              Agreement.  During the  Employment  Period,  the  Executive  shall
              exercise  authority and perform  executive  duties as an Executive
              Vice President of the Bank.

                      (b) During the Employment  Period, the Executive shall (i)
              not engage in consulting work or any trade or business for his own
              account  or  for  or on  behalf  of  any  other  person,  firm  or
              corporation  which  competes,  conflicts or materially  interferes
              with the  performance of his duties  hereunder in any way and (ii)
              accept  such  additional  office  or  offices  to  which he may be
              elected by the Board of Directors of the Bank,  provided  that the
              performance  of the  duties  of such  office or  offices  shall be
              consistent  with the scope of the duties provided for in paragraph
              1.1(a).

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                      (c)  The  Executive  shall  be  required  to  perform  the
              services and duties  provided for in paragraph  1.1(a) only at the
              principal  office of the Bank in  Columbia,  Maryland,  or at such
              other locations  acceptable to the Executive.  The Executive shall
              be entitled to vacation,  leave of absence,  and leave for illness
              or  temporary  disability  in  accordance  with the policies to be
              established for the Bank, which shall be similar to those commonly
              offered  at  comparable  banking  institutions,  and any  leave on
              account of illness or temporary  disability shall not constitute a
              breach by the Executive of his agreements hereunder.

              1.2.  Compensation and General  Benefits.  As compensation for his
services under this Agreement, the Executive shall be compensated as follows:

                    (a) The Bank shall pay the  Executive an annual salary which
              is not less than the greater of (i) a base  salary of  $150,000.00
              per annum, or (ii) any subsequently established higher annual base
              salary.   Such  salary   shall  be  payable  in   periodic   equal
              installments which are no less frequent than monthly.  Such salary
              shall be subject to normal  periodic  review at least annually for
              increases   based  on  the  salary   policies   of  the  Bank  and
              contributions to the enterprises.

                    (b) The Executive  shall be entitled to  participate in such
              pension,  profit sharing,  stock  incentive,  stock option,  stock
              purchase,  incentive,  group and individual disability,  group and
              individual life,  survivor  income,  sickness,  accident,  dental,
              medical or health  insurance and other plans of the Bank which are
              in  effect  immediately  prior  to  the  effective  date  of  this
              Agreement or in any other or additional benefit programs, plans or
              arrangements  of the Bank which may be established by the Bank, as
              and to the extent any such benefit programs, plans or arrangements
              are or may from time to time be in effect,  as  determined  by the
              Bank and terms  hereof.  The Bank shall  neither (i)  terminate or
              amend  any  benefit  program,  plan  or  arrangement  of the  Bank
              pursuant to which the Executive, or his dependents,  beneficiaries
              or estate, is or shall be entitled to benefits, nor (ii) terminate
              or amend any formula or method set forth in any  benefit  program,
              plan or  arrangement  of the Bank pursuant to which the amount and
              type of  benefits  to  which  the  Executive,  or his  dependents,
              beneficiaries  or estate,  is or shall be entitled  thereunder are
              determined,  if such  termination  or  amendment  would in any way
              modify or deprive the Executive, or his dependents,  beneficiaries
              or  estate,  of any  benefits  to  which  he,  or his  dependents,
              beneficiaries or estate, is or shall be entitled under any benefit
              program, plan or arrangement of the Bank, unless (a) the Executive
              expressly  consents in writing to such termination or amendment or
              (B) the  amendment is required by law or  regulation  and the Bank
              shall,  to the  extent  necessary,  provide,  pay or  provide  for
              payment of amounts  equal to any benefits  lost or reduced by such
              amendment.  Throughout the period of his employment hereunder, the
              Executive  shall  be  entitled  to the  receipt  of  any  personal
              benefits from the Bank at the Bank's  expense  including,  but not
              limited  to,  any  other  perquisites  provided  by  the  Bank  to
              executives with comparable  authority or duties. The term "benefit

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              programs,  plans,  or  arrangements  of the  Bank" as used in this
              Agreement refers to the matters in this paragraph 1.2(b).

              2. Competition;  Confidential  Information.  The Executive and the
Bank  recognize that due to the nature of his  association  with the Bank and of
his engagements  hereunder,  and the  relationship of the Executive to the Bank,
both in the past as an organizer and in the future hereunder,  the Executive has
had access to and has acquired,  will have access to and will  acquire,  and has
assisted  in  and  may  assist  in  developing,   confidential  and  proprietary
information  relating  to the  business  and  operations  of the  Bank  and  its
affiliates,  including,  without  limiting  the  generality  of  the  foregoing,
information  with  respect to its present and  prospective  systems,  customers,
agents,  accounts,  deposits,  loans,  and  sales  and  marketing  methods.  The
Executive acknowledges that such information has been and will continue to be of
central  importance  to the  business  of the Bank and its  affiliates  and that
disclosure  of it to or its use by others  could cause  substantial  loss to the
Bank.  The Executive and the Bank also  recognize  that an important part of the
Executive's  duties will be to develop  goodwill for the Bank and its affiliates
through his personal  contact with customers,  agents and others having business
relationships with the Bank and its affiliates,  and that there is a danger that
this goodwill,  a proprietary  asset of the Bank and its affiliates,  may follow
the  Executive if and when his  relationship  with the Bank is  terminated.  The
Executive accordingly agrees as follows:

              2.1.Non-Competition.

                      (a) During the Non-Competition  Period, the Executive will
              not,  directly or  indirectly,  either  individually  or as owner,
              partner, agent, employee,  consultant or otherwise, except for the
              account   of  and  on  behalf  of  the  Bank  or  its   affiliates
              ("affiliates"  is defined  solely for purposes of this paragraph 2
              as  "Columbia  Bancorp  and  its  subsidiaries"),  engage  in  any
              activity  competitive  with  the  business  of  the  Bank  or  its
              affiliates,  nor during  the  Non-Competition  Period  will he, in
              competition with the Bank or its affiliates,  solicit or otherwise
              attempt to  establish  for  himself or any other  person,  firm or
              entity,  any  business  relationships  with  any  person,  firm or
              corporation  which was,  at any time  during  the  Non-Competition
              Period, (i) a state or national bank, (ii) a bank holding company,
              or (iii) a direct or  indirect  subsidiary  of a state or national
              bank  or a bank  holding  company,  in  each  case  which  has its
              principal  operations located in Howard County,  Montgomery County
              and Prince George's County, Maryland or within a 15 mile radius of
              the principal  office of the  Corporation  in Columbia,  Maryland,
              excepting both the City of Baltimore and Washington, D.C.

                      (b) The Non-Competition  Period shall commence on the date
              of this Agreement and shall terminate on:

                           (i)   The date of the termination of the Employment
                    Period; or

                           (ii) If the Executive resigns in circumstances  other
                    than those  described in paragraph  4.3(a)(ii),  two years

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<PAGE>

                    after  the date of such  resignation;  provided,  however,
                    that if the Executive  resigns  during a Change in Control
                    Period in  circumstances  other  than those  described  in
                    paragraph  4.3(a)(ii),  the  Non-Competition  Period shall
                    terminate on the date of such resignation; or

                           (iii) If the  Executive is  terminated  for cause (as
                    defined in paragraph  4.3(b)),  two years after the date of
                    such termination for cause.

                      (c)  Nothing in this  paragraph  2 shall be  construed  to
              prevent the Executive from owning, as an investment, not more than
              1% of a class  of  equity  securities  issued  by any  issuer  and
              publicly traded and registered  under Section 12 of the Securities
              Exchange Act of 1934.

              2.2. Trade Secrets. The Executive will keep confidential any trade
              secrets or confidential or proprietary information of the Bank and
              its affiliates  which are now known to him or which  hereafter may
              become known to him as a result of his  employment or  association
              with the Bank and shall  not at any time  directly  or  indirectly
              disclose any such information to any person,  firm or corporation,
              or use the  same in any way  other  than in  connection  with  the
              business  of the Bank or its  affiliates  during  and at all times
              after the  expiration of the  Employment  Period.  For purposes of
              this  Agreement,  "trade  secrets or  confidential  or proprietary
              information"  means  information  unique to the Bank or any of its
              affiliates  which has a  significant  business  purpose and is not
              known or generally  available from sources outside the Bank or any
              of its affiliates or typical of industry practice.

              3. Bank's  Remedies for Breach.  It is recognized  that damages in
the event of breach of paragraph 2 by the Executive  would be difficult,  if not
impossible,  to ascertain, and it is therefore agreed that the Bank, in addition
to and without  limiting any other  remedy or right it may have,  shall have the
right to an injunction or other  equitable  relief in any federal or state court
of competent  jurisdiction in the State of Maryland,  enjoining any such breach,
and the  Executive  hereby waives any and all defenses he may have on the ground
of lack of  jurisdiction  or competence of the court to grant such an injunction
or other  equitable  relief.  The existence of this right shall not preclude any
other rights and  remedies at law or in equity  which the Bank may have.  In the
event the Bank seeks an injunction against the Executive and lose, then the Bank
shall be liable for damages and for any legal fees  incurred by the Executive in
defending the action.

              4.      Employment Period.

              4.1. Duration. The Employment Period shall commence on the date of
              this Agreement (the "Effective Date") and shall continue until the
              earlier  of (i) the  close of  business  on the date  which is two
              years after the date on which,  during the Employment  Period, the
              Bank gives written  notice of  termination to the Executive or the
              Executive  gives written notice of termination to the Bank but not
              later  than  the  close  of  business  on  [65th   Birthday]  (ii)

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<PAGE>

              termination  of this  Agreement (as defined in paragraph  4.3(a)),
              (iii)  death  of  the  Executive,  (iv)  total  disability  of the
              Executive (as defined in paragraph 4.3(c)), (v) resignation of the
              Executive  in  circumstances  other  than  those  described  under
              paragraph 4.3(a)(ii), or (vi) discharge of the Executive for cause
              (as defined in paragraph 4.3(b)).

              4.2.    Payments after Employment Period.

                      (a) In the event of a termination of this Agreement  under
                  paragraph  4.1(ii),  the Bank shall pay to the  Executive  and
                  provide him with the following:

                           (i) During the  remainder  of the  Employment  Period
                      (determined without regard to paragraph 4.1(ii)),  but not
                      less than one year  following the  occurrence of any event
                      of termination  under  paragraph  4.1(ii),  the Bank shall
                      continue to pay the  Executive  his salary at the rate and
                      as required by paragraph 1.2(a) and in effect  immediately
                      prior to the date of  termination  plus (in any year after
                      the first  year) an annual  bonus  payable  at the time or
                      times customary during the Employment Period,  which bonus
                      shall be equivalent to a certain  percentage of his salary
                      paid to him by the Bank  for each  such  year  during  the
                      remainder of the  Employment  Period  (determined  without
                      regard to paragraph  4.1(ii) but with regard to paragraphs
                      4.1(iii)  and (iv)),  such  percentage  to be equal to the
                      average of the  percentage  of his salary which his annual
                      bonus   represented   during   each  of  the  three  years
                      immediately preceding termination of this Agreement.

                           (ii) During the  remainder of the  Employment  Period
                      (determined  without regard to paragraph  4.1(ii) but with
                      regard to  paragraphs  4.1(iii) and (iv)),  the  Executive
                      shall continue to be treated as an executive (at the level
                      provided for in paragraph 1.1(a)) under all of the benefit
                      programs,  plans or  arrangements of the Bank described in
                      paragraph  1.2(b).   In  addition,   the  Executive  shall
                      continue  to be  entitled  to  all  benefits  and  service
                      credits for  benefits  under all of the benefit  programs,
                      plans or  arrangements  of the Bank described in paragraph
                      1.2(d) as if he were still  employed  during  such  period
                      under this Agreement.

                           (iii) If, despite the provisions of subparagraph (ii)
                      above,  benefits,  service credits, or the right to accrue
                      further  benefits  or service  credits  under any  benefit
                      programs,  plans or  arrangements of the Bank described in
                      paragraph  1.2(b)  shall not be payable or provided to the
                      Executive,  or his dependents,  beneficiaries  and estate,
                      because he is not longer an employee of one or both of the
                      Bank, the Bank shall,  to the extent  necessary,  provide,
                      pay or provide for payment of equivalent benefits, service
                      credits and rights to accrue  further  benefits or service
                      credits  to or  for  the  benefit  of the  Executive,  his
                      dependents, beneficiaries and estate.

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<PAGE>


                      (b) In the event of a termination of this Agreement  under
                  paragraph 4.1(ii),  the Executive in his discretion may elect,
                  within 60 days after such  termination,  to be paid a lump sum
                  or other agreed  severance  allowance  in lieu of  termination
                  payments provided for in paragraph 4.2(a) in an amount of cash
                  which shall be negotiated  and agreed upon in writing  between
                  the  Executive  and  the  Bank.  Among  the  forms  which  the
                  severance allowance may take, if negotiated and agreed upon in
                  writing  between the Executive and the Bank,  shall be payment
                  of equal  installments  to the  Executive the present value of
                  which,  computed at the time  required by Section  4999 of the
                  Internal  Revenue  Code of 1986  (the  "Code"),  is below  the
                  threshold  necessary to trigger  applicability of Section 4999
                  of the Code which  imposes a  nondeductible  excise tax on any
                  recipient of an "excess parachute payment" equal to 20% of the
                  amount of such payment.  In the event that the Executive makes
                  an election pursuant to this paragraph  4.2(b),  the severance
                  allowance shall represent the present fair market value of the
                  amount of salary, bonuses and all benefit programs,  plans and
                  arrangements of the Bank which the Executive would be entitled
                  to during the Employment Period (determined  without regard to
                  paragraph  4.1(iii)) under this Agreement.  Upon the date that
                  the Bank and the  Executive  enter  into a  written  agreement
                  providing for a severance  payment,  the Bank's obligations to
                  the Executive pursuant to paragraph 4.2(a) shall terminate. In
                  the  event  that the  Executive  and the Bank  are  unable  to
                  negotiate a mutually  satisfactory  agreement  concerning  the
                  amount  of a  severance  payment  pursuant  to this  paragraph
                  4.2(b), then the Executive shall receive termination  payments
                  and benefits as provided in paragraphs  4.2(a).  Payments made
                  under this paragraph 4.2(b) shall continue notwithstanding the
                  subsequent death or disability of the Executive.

                      (c) In the event of a termination of this Agreement  under
                  paragraph  4.1(iii),  (i) the Bank  shall pay the  Executive's
                  estate an amount  equal to six months'  salary at the rate and
                  as  required  by  paragraph  1.2(a) and in effect  immediately
                  prior to the date of  death,  (ii)  the  Bank  shall  continue
                  benefits  under  the  Bank's  sickness,   accident  or  health
                  insurance  for a period of six months  following  death of the
                  Executive  for  those  dependents  and  beneficiaries  of  the
                  Executive  who  were  covered  by  such  programs,   plans  or
                  arrangements at the date of the Executive's  death,  and (iii)
                  the Executive's  dependents,  beneficiaries and estate, as the
                  case may be, will receive such survivor and other  benefits as
                  they may be entitled under the terms of the benefit  programs,
                  plans,  and  arrangements  described in paragraph 1.2(b) which
                  provide benefits upon death of the Executive.

                      (d) In the event of a termination of this Agreement  under
                  paragraph  4.1(iv),  (i) the Bank shall pay the  Executive  an
                  amount equal to six months' salary at the rate and as required
                  by  paragraph  1.2(a) and in effect  immediately  prior to the
                  date  of  total  disability,  (ii)  the  Bank  shall  continue
                  benefits  under  the  Bank's  sickness,  accident  and  health
                  insurance for two years following the date of total disability

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                  for the Executive and his dependents and beneficiaries who are
                  covered by such programs,  plans and  arrangements  during the
                  two-year period; and (iii) the Executive,  and his dependents,
                  beneficiaries  and estate,  as the case may be,  will  receive
                  such  benefits as they may be entitled  under the terms of the
                  benefit  programs,   plans,  and  arrangements   described  in
                  paragraph 1.2(b) which provided benefits upon total disability
                  of the Executive.

                      (e) In the event of a termination of this Agreement  under
                  paragraph  4.1(v) or (vi), the Executive,  and his dependents,
                  beneficiaries  and estate,  as the case may be,  will  receive
                  such  benefits as they may be entitled  under the terms of the
                  benefit   programs,   plans,  and  arrangements  of  the  Bank
                  described in  paragraph  1.2(b) which  provide  benefits  upon
                  retirement,  resignation  or discharge for cause,  as the case
                  may be.

                      (f) The  Executive  shall not be required to mitigate  the
                  amount of any payment  provided for in this  paragraph  4.2 by
                  seeking  employment or otherwise,  nor shall the amount of any
                  payment  provided for in this  paragraph 4.2 be reduced by any
                  compensation  or  remuneration  earned by the Executive as the
                  result of employment by another employer,  or self-employment,
                  or as a partner,  after the date of  termination or otherwise.
                  Any payment provided for in this paragraph 4.2 shall be deemed
                  "liquidated damages" rather than a "penalty."

              4.3.    Definitions.  The following words shall have the specified
              meanings when used in the paragraphs specified:

                      (a) In paragraphs 4.1(ii),  4.2(a) and (b) and 5, the term
                  "termination"  means  termination  (i)  by  the  Bank  of  the
                  employment of the Executive with the Bank for any reason other
                  than death or total  disability of the Executive or other than
                  for cause,  or (ii) by  resignation  of the Executive due to a
                  significant  change in the nature or scope of his  authorities
                  or  duties  from  those   contemplated  in  paragraph  1.1,  a
                  reduction  in  total   compensation   from  that  provided  in
                  paragraph  1.2,  or the  breach  by  the  Bank  of  any  other
                  provision of this Agreement.

                      (b) In paragraphs 4.1(vi) and 4.3(a)(i),  the term "cause"
                  means    (i)    substantiated    fraud,    or    substantiated
                  misappropriation  resulting in material damage to the property
                  or  business  of the  Bank;  conviction  for  commission  of a
                  felony;  (ii)  continuance  of  either  willful  and  repeated
                  failure  or  grossly  negligent  and  repeated  failure by the
                  Executive  to  perform  his  duties  in  compliance  with this
                  Agreement  after written  notice to the Executive by the Board
                  of  Directors  specifying  such  failure,  provided  that such
                  "cause"  shall have been found by a majority vote of the Board
                  of Directors of the Bank (who are not serving as a designee of
                  a  person   having  an  interest  in  excess  of  25%  of  the
                  outstanding stock of Columbia Bancorp) after at least 10 days'
                  written notice to the Executive  specifying the cause proposed
                  to be claimed and after an opportunity for the Executive to be

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                  heard  at  meetings  of such  Board of  Directors;  or (iii) a
                  continued violation of paragraph 2 after written notice to the
                  Executive by the Board of Directors  specifying such violation
                  and  providing the  Executive  the  opportunity  to cease such
                  violation  within  20 days  from  the date of  receipt  by the
                  Executive of such notice.

                      (c) In paragraphs 1.1(c),  4.1(iv),  4.2(d) and 4.3(a)(i),
                  the term "total  disability" means total disability as defined
                  in the Bank's group and individual  disability plans. If there
                  is  no  such  plan,  then  "total   disability"   means  total
                  disability as defined in the Executive's individual disability
                  policy,  and if there is no such  policy,  as  defined  in the
                  group  disability  plan for the law  firm of  Piper &  Marbury
                  L.L.P., 36 South Charles Street, Baltimore, Maryland 21201.

              4.4. (a) If prior to the first anniversary date of this Agreement,
              the Executive resigns for any reason,  the Bank will pay, or cause
              to be paid,  to the  Executive  an  amount  equal to one times the
              Executive's  annual base salary immediately before the Executive's
              resignation.

                   (b) Such  payment  shall be made in one lump sum within 15
              business days after the Executive's resignation.

              5.  Payments  for  Termination  or  Resignation  after a Change in
Control.

              5.1.    Definitions.

                      (a) A  "Change  in  Control,"  as used in this  Agreement,
              shall be deemed to have occurred when:

                      (i)  Any  person (as such term is used in  Sections  13(d)
              and 14(d) of the  Securities  Exchange  Act  of  1934, as amended,
              and  the regulations  promulgated  thereunder) is or becomes the
              beneficial  owner, directly  or indirectly, of  25% or more of the
              voting equity stock of Columbia Bancorp,  or any   person (as such
              term is used in Sections 13(d) and 14(d)of the Securities Exchange
              Act  of  1934, as  amended,  and  the  regulations  promulgated
              thereunder) other than Columbia Bancorp is or becomes the
              beneficial  owner,  directly or indirectly, of 25% or more of the
              Common Stock of the Bank; or

                      (ii) Any  person (as such term is used in  Sections  13(d)
              and 14(d) of the Securities Exchange Act of 1934, as amended,  and
              the  regulations  promulgated  thereunder)  gains  control  of the
              election  of a  majority  of the Board of  Directors  of  Columbia
              Bancorp, or any person (as such term is used in Sections 13(d) and
              14(d) of the Securities Exchange Act of 1934, as amended,  and the
              regulations  promulgated  thereunder)  other than Columbia Bancorp
              gains  control  of the  election  of a  majority  of the  Board of
              Directors of the Bank; or

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<PAGE>

                      (iii) Any person (as such term is used in  Sections  13(d)
              and 14(d) of the Securities Exchange Act of 1934, as amended,  and
              the  regulations  promulgated  thereunder)  gains  control  of the
              management or policies of the Bank; or

                      (iv) the Bank  consolidates  with, or merges with or into,
              another entity (including a corporation, bank, partnership, trust,
              association,  joint venture, pool, syndicate, sole proprietorship,
              unincorporated  organization  or any  other  form  of  entity  not
              specifically listed herein) or sells, assigns, conveys, transfers,
              leases or otherwise  disposes of all or  substantially  all of its
              assets, or another such entity  consolidates  with, or merges with
              or into,  the Bank, in any such event pursuant to a transaction in
              which the issued and outstanding shares of the voting equity stock
              of the Bank are converted  into or exchanged for cash,  securities
              or other property; or

                      (v) during any consecutive  two-year  period,  individuals
              who at the  beginning  of such  period  constituted  the  Board of
              Directors of the Bank (together with any directors who are members
              of the Board of Directors on the date hereof and any new directors
              whose election by such Board of Directors or whose  nomination for
              election by the stockholders of the Bank was approved by a vote of
              66-2/3% of the  directors  then  still in office  who were  either
              directors  at the  beginning  of such period of whose  election or
              nomination for election was previously so approved)  cease for any
              reason to  constitute  a majority of the Board of Directors of the
              Bank then in office.

                      (b) A "Change in  Control Period"  shall mean  the period
              commencing  90 days before a Change in Control and ending 365 days
              after such Change in Control.

              5.2. Amount of Payments.  Except as provided in paragraph  5.2(e),
         and in lieu of amounts payable under paragraph 4, the Bank will pay the
         Executive the following amounts in the following circumstances:

                      (a) (i) If the  Executive is terminated by the Bank in the
              circumstances  described  under  paragraph  4.3(a)(i),  or if  the
              Executive  resigns  during  a  Change  in  Control  Period  in the
              circumstances described under paragraph 4.3(a)(ii), or if during a
              Change in Control  Period the Executive  resigns in  circumstances
              other than those  described  under  paragraph  4.3(a)(ii)  without
              having been offered an employment agreement the terms of which are
              comparable to those of this Agreement, the Bank will pay, or cause
              to be paid, to the Executive:  (a) if the Executive's  termination
              or resignation occurs before the Executive has attained the age of
              63  years,  an  amount  equal  to two  times  the  sum of (i)  the
              Executive's  annual base salary  immediately  before the Change in
              Control and (ii) the average of the bonuses paid to the  Executive
              over the past three years  (including  years in which no bonus was
              awarded);  or (b) if the  Executive's  termination  or resignation
              occurs on or after the Executive has attained the age of 63 years,
              an amount equal to the amount set forth in paragraph  5.2(a)(i)(a)


                                      131
<PAGE>

              multiplied  by a  fraction,  the  numerator  of which shall be 730
              minus the number of days which have passed  since the  Executive's
              63rd birthday, and the denominator of which shall be 730.

                          (ii)   Such  payment  shall be made  in  one lump  sum
              within 15  business days  after the  Executive's  termination  or
              resignation.

                      (b) (i) If the  Executive  resigns  during  a  Change  in
              Control Period in  circumstances  other than those described under
              paragraph  4.3(a)(ii)  after  having  been  offered an  employment
              agreement  the  terms of  which  are  comparable  to those of this
              Agreement,  the  Bank  will  pay,  or  cause  to be  paid,  to the
              Executive:  (a) if the Executive's  resignation  occurs before the
              Executive has attained the age of 64 years, an amount equal to the
              sum of (i) the Executive's  annual base salary  immediately before
              the Change in Control and (ii) the average of the bonuses  paid to
              the Executive over the past three years  (including years in which
              no  bonus  was  awarded);  or (b) if the  Executive's  resignation
              occurs on or after the Executive has attained the age of 64 years,
              an amount equal to the amount set forth in paragraph  5.2(b)(i)(a)
              multiplied  by a  fraction,  the  numerator  of which shall be 365
              minus the number of days which have passed  since the  Executive's
              64th birthday, and the denominator of which shall be 365.

                          (ii) Such  payment  shall be made in one lump sum
              within 15 business days after the Executive's resignation.

                      (c)  Except  as  provided  in  paragraph  5.2(e),  if  the
              Executive  is  terminated  by the Bank or resigns as  described in
              paragraph 5.2(a), or resigns as described in paragraph 5.2(b), the
              Executive  shall  continue  to  receive  all  health,   life,  and
              disability   insurance  benefits  available  to  him  pursuant  to
              paragraph  1.2(b)  of  this  Agreement   immediately  before  such
              termination  or  resignation.  The  Executive  shall  continue  to
              receive such  benefits  until the earliest of (a) such time as the
              Executive   shall  have  been  receiving   substantially   similar
              insurance benefits for six months under subsequent employment, (b)
              24 months after the date of a termination or resignation described
              in paragraph  5.2(a) or 12 months after the date of a  resignation
              described in paragraph  5.2(b),  or (c) such date as the Executive
              shall have attained the age of 65 years.

                      (d) All options  granted to the Executive under the Bank's
              stock  option  award  arrangements  providing  for the granting of
              options to acquire  common  stock to founders,  directors  and key
              employees shall immediately  become fully vested in the event of a
              Change in Control.

                      (e)  The  Executive  is  to  receive  no  payments   under
              paragraph  5.2(a) or (b) and no benefits under paragraph 5.2(c) if
              the  Executive  is  terminated  during a Change in Control  Period
              after  having  already  attained  the age of 65  years,  or if the
              Executive  is  terminated  by the Bank  during a Change in Control

                                      132
<PAGE>

              Period upon the death or total  disability of the Executive or for
              cause.  In an  instance  of  death  or  total  disability  of  the
              Executive,    however,   the   Executive   and   his   dependents,
              beneficiaries  and estate shall  receive any  benefits  payable to
              them under paragraphs 4.2 (c) and 4.2 (d).

                      (f) Notwithstanding  the foregoing,  in the event that any
              of the amounts payable to the Executive under paragraph 5.2 would,
              if made, cause the Executive to have tax under Section 4999 of the
              Code, the Executive may elect,  at his  discretion,  to reduce the
              amount payable to him under  paragraph  5.2(a) or (b) by an amount
              such that the  aggregate  after-tax  amounts  the  Executive  will
              receive  under  paragraph  5.2  will  be  equal  to the  aggregate
              after-tax   amounts  the  Executive   would  receive  without  the
              reduction  he  elected  (i.e.,  the  aggregate  amounts  after the
              application  of the tax under  Section  4999 of the Code and other
              taxes)."

                  6. Legal  Costs.  If (i) the Bank shall fail to pay or provide
for payment of any amounts  required to be paid or provided for hereunder at any
time,  (ii) the  Executive  desires to consult with or retain  counsel as to any
possible  breach by the Bank of this  Agreement or as to any of his rights under
this  Agreement,  or (iii) the Executive  desires to retain counsel to review or
negotiate  the  terms  of this  Agreement  prior to the  effective  date of this
Agreement, the Executive shall be entitled to consult with counsel, and the Bank
agree to pay the  reasonable  fees and expenses of  independent  counsel for the
Executive  in  reviewing  or  negotiating  this  Agreement,  advising  him or in
bringing  any  proceedings,  or in  defending  any  proceedings,  involving  the
Executive's  rights  under this  Agreement,  such right to  reimbursement  to be
immediate  upon the  presentment  by  Executive  of  written  billings  for such
reasonable  fees and  expenses.  The  Executive  shall be  entitled  to  receive
interest  (at the prime rate of  interest  established  from time to time at The
First National Bank of Maryland) on any payments of such expenses,  or any other
payments under this Agreement, that are overdue.

                  7.   Notices.   Any  notice,   requests,   demands  and  other
communications  provided for by this Agreement shall be sufficient if in writing
and if sent by registered or certified  mail/return  receipt to the Executive at
the last address he has filed in writing with either of the Bank or, in the case
of the Bank, at its principal executive offices.

                  8. Binding Agreement.  This Agreement shall be effective as of
the date  hereof  and  shall be  binding  upon and inure to the  benefit  of the
Executive,  his  executors,  administrators  and personal  representatives.  The
rights and  obligations of the  Corporation and of the Bank under this Agreement
shall inure to the benefit of and shall be binding  upon the Bank,  and shall be
transferred to and be binding upon any successor of the Bank including,  but not
limited  to,  any  successor  of the  Bank  pursuant  to a  merger,  conversion,
consolidation,  or transfer of assets;  provided, that this Agreement may not be
assigned by the Bank without the consent of the Executive,  and in the case of a
successor by transfer of all or substantially  all of the assets of the Bank, or
any other  successor  in which the Bank does not cease to exist by  operation of
the  transaction  in question as a matter of law, the Bank shall not be relieved
of its obligations hereunder;  provided further, that in the case of dissolution

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<PAGE>

and winding up of the business of the Bank,  this Agreement and the  obligations
hereunder shall be binding upon the trustee of the Bank's assets.

                  9. Entire  Agreement.  This Agreement  constitutes  the entire
understanding  of the Executive and the Bank with respect to the subject  matter
hereof  and  supersedes  any and all  prior  understandings,  written  or  oral,
including any prior  employment  agreements  between the Bank and the Executive.
This Agreement may not be changed,  modified,  or discharged orally, but only by
an instrument in writing signed by the parties. This Agreement shall be governed
by the laws of the State of Maryland and the invalidity or  unenforceability  of
any provisions  hereof shall in no way affect the validity or  enforceability of
any other provision.


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<PAGE>



                  IN WITNESS  WHEREOF,  the parties have  executed and delivered
this Agreement on ____________ _____.

ATTEST:                                    THE COLUMBIA BANK


- -------------------------                  ------------------------
                                           John M. Bond, Jr.
                                           President and Chief Executive Officer


WITNESS:


- -------------------------                  ------------------------
                                           Stephen A. Horvath


                                      135



                                                                     Exhibit 3.3


                                COLUMBIA BANCORP

                        1999 AMENDED AND RESTATED BY-LAWS


             (Amended through and Restated as of September 27, 1999)



                                   ARTICLE I.

                                  STOCKHOLDERS

     SECTION 1.01.  Annual   Meeting.  The  Corporation  shall  hold  an  annual
meeting of its  stockholders  to elect directors and transact any other business
within its  powers,  either at 3:00 p.m.  on the third  Tuesday of April in each
year if not a legal holiday,  or at such other time on such other day falling on
or before  the 30th day  thereafter  as shall be set by the Board of  Directors.
Except as the  Charter  or  statute  provides  otherwise,  any  business  may be
considered at an annual  meeting  without the purpose of the meeting having been
specified in the notice.  Failure to hold an annual  meeting does not invalidate
the Corporation's existence or affect any otherwise valid corporate acts.

     SECTION 1.02.  Special Meeting.  At any time in the interval between annual
meetings, a special meeting of the stockholders may be called by the Chairman of
the Board or the President or by a majority of the Board of Directors by vote at
a meeting or in writing  (addressed to the Secretary of the Corporation) with or
without a meeting.  Special meetings of the stockholders  shall be called by the
Secretary  at the  request  of  stockholders  only  on the  written  request  of
stockholders  entitled to cast at least a majority of all the votes  entitled to
be cast at the meeting.  A request for a special meeting shall state the purpose
of the  meeting and the  matters  proposed  to be acted on at it. The  Secretary
shall inform the stockholders  who make the request of the reasonably  estimated
costs of preparing  and mailing a notice of the meeting and, on payment of these
costs to the  Corporation,  notify  each  stockholder  entitled to notice of the
meeting.  The Board of Directors  shall have sole power to fix the date and time
of the special meeting.

     SECTION 1.03.  Place  of Meetings.  Unless  the Charter provides otherwise,
meetings of stockholders shall be held at such place as is set from time to time
by the Board of Directors.

     SECTION 1.04.  Notice of Meetings; Waiver of Notice.  Not less than ten nor
more than 90 days before each  stockholders'  meeting,  the Secretary shall give
written  notice  of the  meeting  to each  stockholder  entitled  to vote at the
meeting and each other stockholder entitled to notice of the meeting. The notice
shall state the time and place of the  meeting  and, if the meeting is a special


<PAGE>

meeting or notice of the  purpose is  required  by  statute,  the purpose of the
meeting. Notice is given to a stockholder when it is personally delivered to him
or her,  left at his or her  residence or usual place of business,  or mailed to
him or her at his or her address as it appears on the records of the Corporation
or transmitted  to the  stockholder  by electronic  mail to any electronic  mail
address of the stockholder or by any other electronic means. Notwithstanding the
foregoing provisions,  each person who is entitled to notice waives notice if he
or she before or after the meeting  signs a waiver of the notice  which is filed
with the  records of  stockholders'  meetings,  or is present at the  meeting in
person or by proxy.

     SECTION 1.05.  Quorum;  Voting.  Unless any statute or the Charter provides
otherwise,  at a meeting of  stockholders  the presence in person or by proxy of
stockholders entitled to cast a majority of all the votes entitled to be cast at
the  meeting  constitutes  a quorum,  and a majority  of all the votes cast at a
meeting at which a quorum is present is  sufficient  to approve any matter which
properly comes before the meeting, except that a plurality of all the votes cast
at a meeting at which a quorum is present is sufficient to elect a director.

     SECTION 1.06.  Adjournments.  Whether or not a quorum is present, a meeting
of  stockholders  convened on the date for which it was called may be  adjourned
from time to time without further notice by a majority vote of the  stockholders
present  in  person  or by  proxy to a date not  more  than 120 days  after  the
original  record date.  Any  business  which might have been  transacted  at the
meeting as  originally  notified  may be  deferred  and  transacted  at any such
adjourned meeting at which a quorum shall be present.

     SECTION 1.07.  General Right to Vote; Proxies.  Unless the Charter provides
for a  greater  or lesser  number of votes per share or limits or denies  voting
rights, each outstanding share of stock, regardless of class, is entitled to one
vote on each matter submitted to a vote at a meeting of stockholders; however, a
share is not  entitled to be voted if any  installment  payable on it is overdue
and unpaid. In all elections for directors, each share of stock may be voted for
as many  individuals as there are directors to be elected and for whose election
the  share is  entitled  to be  voted.  A  stockholder  may vote the  stock  the
stockholder  owns of record either in person or by proxy. A stockholder may sign
a  writing  authorizing  another  person  to  act  as  proxy.   Signing  may  be
accomplished by the stockholder or the  stockholder's  authorized  agent signing
the writing or causing the stockholder's  signature to be affixed to the writing
by any  reasonable  means,  including  facsimile  signature.  A stockholder  may
authorize  another person to act as proxy by  transmitting,  or authorizing  the
transmission of, an authorization by a telegram, cablegram, datagram, electronic
mail or any other electronic or telephonic means to the person authorized to act
as proxy or to any other person authorized to receive the proxy authorization on
behalf  of  the  person  authorized  to  act as the  proxy,  including  a  proxy
solicitation firm or proxy support service organization. Unless a proxy provides
otherwise,  it is not  valid  more than 11  months  after  its date.  A proxy is
revocable by a stockholder at any time without condition or qualification unless
the  proxy  states  that it is  irrevocable  and the  proxy is  coupled  with an
interest.  A proxy may be made  irrevocable for so long as it is coupled with an
interest. The interest with which a proxy may be coupled includes an interest in
the  stock to be voted  under  the  proxy or  another  general  interest  in the
Corporation or its assets or liabilities.

                                       2
<PAGE>


     SECTION 1.08.  List  of Stockholders.  At  each meeting of stockholders,  a
full,  true  and  complete  list of all  stockholders  entitled  to vote at such
meeting,  showing the number and class of shares held by each and  certified  by
the transfer agent for such class or by the Secretary, shall be furnished by the
Secretary.

     SECTION 1.09.  Conduct of Business.  Nominations of persons for election to
the Board of  Directors  and the  proposal of business to be  considered  by the
stockholders  may be made at an annual meeting of  stockholders  (a) pursuant to
the Corporation's  notice of meeting, (b) by or at the direction of the Board of
Directors or (c) by any stockholder of the Corporation (i) who was a stockholder
of record at the time of  giving  notice(s)  provided  for in  Section  1.11 and
Section 1.12, (ii) who is entitled to vote at the meeting and (iii) who complied
with the  notice(s)  procedures  set forth in  Section  1.11 and  Section  1.12.
Nominations  of persons for election to the Board of Directors  and the proposal
of  business  to be  considered  by the  stockholders  may be made at a  special
meeting of stockholders (a) only pursuant to the Corporation's notice of meeting
and (b),  in the case of  nominations  of persons  for  election to the Board of
Directors,  (i) by or at the  direction of the Board of Directors or (ii) by any
stockholder of the  Corporation  (A) who was a stockholder of record at the time
of giving notice  provided for in Section  1.11,  (B) who is entitled to vote at
the meeting and (C) who complied with the notice procedures set forth in Section
1.11.  The  chairman of the meeting  shall have the power and duty to  determine
whether a nomination or any business  proposed to be brought  before the meeting
was made in accordance  with the procedures  set forth in Section 1.11,  Section
1.12 and this  Section  and, if any  proposed  nomination  or business is not in
compliance  with Section 1.11,  Section 1.12 and this  Section,  to declare that
such defective nomination or proposal be disregarded.

     SECTION 1.10.  Conduct of Voting.  At all meetings of stockholders,  unless
the  voting is  conducted  by  inspectors,  the  proxies  and  ballots  shall be
received,  and all  questions  touching  the  qualification  of  voters  and the
validity of proxies, the acceptance or rejection of votes and procedures for the
conduct of business not  otherwise  specified by these  By-Laws,  the Charter or
law, shall be decided or determined by the chairman of the meeting.  If demanded
by stockholders,  present in person or by proxy,  entitled to cast 10% in number
of votes entitled to be cast, or if ordered by the chairman of the meeting,  the
vote upon any election or question shall be taken by ballot.  Before any meeting
of the  stockholders,  the Board of  Directors  may  appoint  persons  to act as
inspectors  of  election  at the  meeting  and any  adjournment  thereof.  If no
inspectors of election are so appointed, the chairman of the meeting may, and on
the request of stockholders, present in person or by proxy, entitled to cast 10%
in number of votes entitled to be cast, shall, appoint inspectors of election at
the  meeting.  The  number  of  inspectors  shall be  either  one or  three.  If
inspectors  are  appointed  at a meeting  on the  request of  stockholders,  the
holders of a majority of shares  present in person or by proxy  shall  determine
whether one or three  inspectors are to be appointed.  No candidate for election
as a director at a meeting  shall serve as an inspector  thereat.  If any person
appointed as inspector  fails to appear or fails or refuses to act, the chairman
of the meeting may,  and upon the request of any  stockholder  shall,  appoint a
person to fill that vacancy. The inspectors shall determine the number of shares
outstanding and the voting power of each, the shares represented at the meeting,
the existence of a quorum, and the authenticity, validity and effect of proxies;


                                       3
<PAGE>

receive  votes,  ballots or consents;  hear and  determine  all  challenges  and
questions  in any way arising in  connection  with the right to vote;  count and
tabulate all votes or consents;  determine when polls shall close; determine the
result; and do any other acts that may be proper to conduct the election or vote
with fairness to all stockholders.  Unless so demanded or ordered,  no vote need
be by ballot and voting need not be conducted by inspectors.

     SECTION 1.11.  Advance  Notice Provisions for Election of  Directors.  Only
persons who are nominated in accordance with the following  procedures  shall be
eligible for election as directors of the  Corporation.  Nominations  of persons
for  election  to the Board of  Directors  may be made at any annual  meeting of
stockholders,  or at any special meeting of stockholders  called for the purpose
of electing directors,  (a) by or at the direction of the Board of Directors (or
any  duly  authorized  committee  thereof)  or  (b) by  any  stockholder  of the
Corporation  (i) who is a stockholder of record on the date of the giving of the
notice provided for in this Section and on the record date for the determination
of stockholders  entitled to vote at such meeting and (ii) who complies with the
notice  procedures  set forth in this Section.  A  stockholder's  notice must be
delivered to or mailed and received by the Secretary at the principal  executive
offices of the Corporation  (a) in the case of an annual meeting,  not less than
60 days nor more than 90 days prior to the first  anniversary  of the  preceding
year's annual meeting; provided, however, that in the event that the date of the
annual  meeting is advanced by more than 30 days or delayed by more than 60 days
from such anniversary  date,  notice by the stockholder must be so delivered not
earlier  than the 90th day prior to such  annual  meeting and not later than the
close of business  on the later of the 60th day prior to such annual  meeting or
the tenth day following the day on which public announcement of the date of such
meeting is first made; and (b) in the case of a special  meeting of stockholders
called  for the  purpose  of  electing  directors,  not later  than the close of
business on the tenth day  following  the day on which notice of the date of the
special  meeting  was  mailed or public  disclosure  of the date of the  special
meeting  was  made,  whichever  first  occurs.  A  stockholder's  notice  to the
Secretary  must be in  writing  and set  forth  (a) as to each  person  whom the
stockholder  proposes to nominate  for election as a director,  all  information
relating to such person that is required  to be  disclosed  in  connection  with
solicitations of proxies for election of directors pursuant to Regulation 14A of
the Exchange Act, and the rules and regulations promulgated thereunder;  and (b)
as to the  stockholder  giving  the  notice  (i) the  name and  address  of such
stockholder  as they  appear on the  Corporation's  books and of the  beneficial
owner,  if any, on whose behalf the nomination is made, (ii) the class or series
and  number  of  shares  of  capital  stock of the  Corporation  which are owned
beneficially or of record by such stockholder and such beneficial owner, (iii) a
description of all arrangements or  understandings  between such stockholder and
each proposed  nominee and any other person or persons  (including  their names)
pursuant to which the nomination(s)  are to be made by such stockholder,  (iv) a
representation  that such stockholder intends to appear in person or by proxy at
the  meeting  to  nominate  the  persons  named in its  notice and (v) any other
information  relating to such stockholder that would be required to be disclosed
in a proxy  statement or other filings  required to be made in  connection  with
solicitations of proxies for election of directors pursuant to Regulation 14A of
the  Exchange Act and the rules and  regulations  promulgated  thereunder.  Such

                                       4
<PAGE>

notice must be accompanied by a written  consent of each proposed  nominee to be
named as a nominee  and to serve as a director if  elected.  No person  shall be
eligible  for  election as a director of the  Corporation  unless  nominated  in
accordance with the procedures set forth in this Section. If the chairman of the
meeting  determines  that a  nomination  was not  made in  accordance  with  the
foregoing  procedures,  the chairman of the meeting shall declare to the meeting
that the  nomination  was  defective  and  such  defective  nomination  shall be
disregarded.  No adjournment or postponement of a meeting of stockholders  shall
commence  a new  period  for the  giving  of notice  of a  stockholder  proposal
hereunder.

     SECTION 1.12.  Advance  Notice  Provisions for Business to be Transacted at
Annual  Meeting.  No  business  may  be  transacted  at  an  annual  meeting  of
stockholders,  other than business that is either (a) specified in the notice of
meeting (or any supplement thereto) given by or at the direction of the Board of
Directors (or any duly authorized  committee  thereof),  (b) otherwise  properly
brought  before  the  annual  meeting  by or at the  direction  of the  Board of
Directors (or any duly authorized  committee  thereof) or (c) otherwise properly
brought before the annual meeting by any  stockholder of the Corporation (i) who
is stockholder of record on the date of the giving of the notice provided for in
this  Section  and on the  record  date for the  determination  of  stockholders
entitled to vote at such annual  meeting and (ii) who  complies  with the notice
procedures set forth in this Section.  A stockholder's  notice must be delivered
to or mailed and received by the Secretary at the principal executive offices of
the  Corporation  not less than 60 days nor more than 90 days prior to the first
anniversary of the preceding year's annual meeting;  provided,  however, that in
the event that the date of the annual  meeting is  advanced by more than 30 days
or  delayed  by more  than 60 days  from such  anniversary  date,  notice by the
stockholder  must be so  delivered  not earlier  than the 90th day prior to such
annual meeting and not later than the close of business on the later of the 60th
day prior to such  annual  meeting or the tenth day  following  the day on which
public  announcement  of the date of such meeting is first made. A stockholder's
notice to the  Secretary  must in writing  and set forth as to each  matter such
stockholder  proposes to bring before the annual meeting (i) a brief description
of the business  desired to be brought before the annual meeting and the reasons
for conducting such business at the annual meeting, (ii) the name and address of
such stockholder as they appear on the Corporation's books and of the beneficial
owner,  if any, on whose behalf the proposal is made,  (iii) the class or series
and  number  of  shares  of  capital  stock of the  Corporation  which are owned
beneficially or of record by such stockholder and such beneficial  owner, (iv) a
description of all arrangements or  understandings  between such stockholder and
any other  person or persons  (including  their  names) in  connection  with the
proposal of such business by such stockholder and any material  interest of such
stockholder  in such  business and (v) a  representation  that such  stockholder
intends  to appear in person or by proxy at the  annual  meeting  to bring  such
business  before the  meeting.  No  business  shall be  conducted  at the annual
meeting of  stockholders  except  business  brought before the annual meeting in

                                       5
<PAGE>

accordance  with the  procedures  set forth in Section 1.11 or in this  Section,
provided,  however,  that once  business has been  properly  brought  before the
annual meeting in accordance with such  procedures,  nothing in Section 1.11 nor
in this Section shall be deemed to preclude discussion by any stockholder of any
such business. If the chairman of an annual meeting determines that business was
not properly  brought before the annual meeting in accordance with the foregoing
procedures,  the chairman of the meeting  shall  declare to the meeting that the
business was not properly brought before the meeting and such business shall not
be transacted. No adjournment or postponement of a meeting of stockholders shall
commence  a new  period  for the  giving  of notice  of a  stockholder  proposal
hereunder.


                                   ARTICLE II.

                               BOARD OF DIRECTORS

     SECTION 2.01.  Function  of  Directors.  The  business  and  affairs of the
Corporation shall be managed under the direction of its Board of Directors.  All
powers of the Corporation may be exercised by or under authority of the Board of
Directors,  except as conferred on or reserved to the stockholders by statute or
by the Charter or By-Laws.

     SECTION 2.02.  Number  of  Directors.  The  Corporation shall have at least
three directors;  provided that, if there is no stock outstanding, the number of
directors  may be less than three but not less than one,  and, if there is stock
outstanding and so long as there are less than three stockholders, the number of
directors  may be less than three but not less than the number of  stockholders.
The Corporation shall have the number of directors provided in the Charter until
changed as herein  provided.  A majority of the entire  Board of  Directors  may
alter the number of  directors  set by the Charter to not  exceeding 30 nor less
than the minimum number then permitted herein, but the action may not affect the
tenure of office of any director.

     SECTION 2.03.  Election  and Tenure of  Directors.  The  directors shall be
divided  into  three  classes  as nearly  equal in number as  possible.  At each
successive  annual  meeting of  stockholders,  the  holders of stock  present in
person or by proxy at such  meeting  and  entitled to vote  thereat  shall elect
members of each  successive  class to serve for three year terms and until their
successors are elected and qualify.  If the number of directors is changed,  any
increase or decrease  shall be  apportioned  among the classes so as to maintain
the number of  directors  in each  class as nearly  equal as  possible,  and any
additional director of any class shall, subject to Section 2.05, hold office for
a term that shall coincide with the remaining term of that class, but in no case
shall a decrease in the number of  directors  shorten the term of any  incumbent
director.

     SECTION 2.04.  Qualification.  No  person  shall  stand for  election  as a
director who would be 70 years of age on or before the date of the election.

     SECTION 2.05.  Removal  of  Director.  Subject to the rights of the holders
of any class or series separately  entitled to elect one or more directors,  any
director,  or the entire Board of  Directors,  may be removed from office at any
time, but only for cause and then only by the  affirmative  vote of at least 80%
of the votes entitled to be cast  generally for the election for directors.  For
purposes of the foregoing,  "cause," shall mean only (i) conviction of a felony,
(ii) declaration of unsound mind by order of a court, (iii) gross dereliction of
duty,  (iv) conviction of any act involving moral turpitude or (v) commission of
an act that constitutes  intentional misconduct or a knowing violation of law if

                                       6

<PAGE>

such action in either  event  results both in an improper  substantial  personal
benefit to the director and in a material injury to the Corporation.

     SECTION 2.06.  Vacancy on Board of Directors.  Subject to the rights of the
holders  of any  class  of  stock  separately  entitled  to  elect  one or  more
directors, the stockholders may elect a successor to fill a vacancy on the Board
of Directors which results from the removal of a director. A director elected by
the  stockholders to fill a vacancy which results from the removal of a director
serves  for the  balance  of the term of the  removed  director.  Subject to the
rights of the holders of any class of stock separately  entitled to elect one or
more directors, a majority of the remaining directors, whether or not sufficient
to  constitute  a quorum,  may fill a vacancy  on the Board of  Directors  which
results  from any cause  except an  increase in the number of  directors,  and a
majority of the entire Board of Directors  may fill a vacancy which results from
an  increase  in the number of  directors.  A  director  elected by the Board of
Directors to fill a vacancy serves until the next annual meeting of stockholders
and until his or her successor is elected and qualifies.

     SECTION 2.07.  Regular  Meetings.  After  each meeting of  stockholders  at
which  directors  shall have been elected,  the Board of Directors shall meet as
soon  thereafter  as  practicable  for  the  purpose  of  organization  and  the
transaction  of other  business.  In the event  that no other time and place are
specified by  resolution of the Board of Directors or announced by the President
or the  Chairman  of the  Board  at such  stockholders  meeting,  the  Board  of
Directors  shall meet  immediately  following the close of, and at the place of,
such stockholders  meeting.  Any other regular meeting of the Board of Directors
shall be held on such date and time and at such place as may be designated  from
time to time by the Board of  Directors.  No notice of such meeting  following a
stockholders  meeting or any other regular meeting shall be necessary if held as
hereinabove provided.

     SECTION 2.08.  Special   Meetings.  Special   meetings   of  the  Board  of
Directors  may be  called  at any  time  by the  Chairman  of the  Board  or the
President or by a majority of the Board of Directors by vote at a meeting, or in
writing with or without a meeting.  A special  meeting of the Board of Directors
shall be held on such  date and at any place as may be  designated  from time to
time by the Board of Directors. In the absence of designation such meeting shall
be held at such place as may be designated in the call.

     SECTION 2.09.  Notice  of Meeting.  Except as provided in Section 2.07, the
Secretary shall give notice to each director of each regular and special meeting
of the Board of  Directors.  The  notice  shall  state the time and place of the
meeting. Notice is given to a director when it is delivered personally to him or
her,  left at his or her  residence  or  usual  place  of  business,  or sent by
telegraph,  facsimile  transmission  or telephone,  at least 24 hours before the
time of the meeting or, in the  alternative  by mail to his or her address as it
shall  appear on the records of the  Corporation,  at least 72 hours  before the
time of the  meeting.  Unless  these  By-Laws  or a  resolution  of the Board of
Directors  provides  otherwise,  the notice  need not state the  business  to be
transacted at or the purposes of any regular or special  meeting of the Board of
Directors.  No notice of any meeting of the Board of Directors  need be given to
any  director  who  attends  except  where a director  attends a meeting for the

                                       7
<PAGE>

express  purpose of objecting  to the  transaction  of any business  because the
meeting is not lawfully  called or convened,  or to any director who, in writing
executed  and filed with the records of the meeting  either  before or after the
holding  thereof,  waives such  notice.  Any meeting of the Board of  Directors,
regular or special,  may adjourn  from time to time to  reconvene at the same or
some other  place,  and no notice  need be given of any such  adjourned  meeting
other than by announcement.

     SECTION 2.10.  Quorum; Action by Directors.  A majority of the entire Board
of Directors shall  constitute a quorum for the transaction of business.  In the
absence of a quorum,  the directors  present by majority vote and without notice
other than by  announcement  may adjourn  the meeting  from time to time until a
quorum shall attend.  At any such  adjourned  meeting at which a quorum shall be
present,  any business may be transacted which might have been transacted at the
meeting  as  originally  notified.  Unless  statute  or the  Charter  or By-Laws
requires a greater proportion, the action of a majority of the directors present
at a meeting at which a quorum is  present is action of the Board of  Directors.
Any  action  required  or  permitted  to be taken at a  meeting  of the Board of
Directors may be taken without a meeting,  if an unanimous written consent which
sets forth the  action is signed by each  member of the Board of  Directors  and
filed with the minutes of proceedings of the Board of Directors.

     SECTION 2.11.  Meeting  by Conference  Telephone.  At the discretion of the
chairman of the meeting,  members of the Board of Directors may participate in a
meeting by means of a conference telephone or similar  communications  equipment
if all  persons  participating  in the  meeting  can hear each other at the same
time.  Participation in a meeting by these means constitutes  presence in person
at a meeting.

     SECTION 2.12.  Compensation.  By  resolution  of the Board of  Directors  a
fixed sum and  expenses,  if any,  for  attendance  at each  regular  or special
meeting  of  the  Board  of  Directors  or  of  committees  thereof,  and  other
compensation  for  their  services  as such or on  committees  of the  Board  of
Directors,  may be paid to directors.  Directors who are full-time  employees of
the  Corporation  need not be paid for  attendance  at  meetings of the Board of
Directors or committees  thereof for which fees are paid to other  directors.  A
director  who serves the  Corporation  in any other  capacity  also may  receive
compensation for such other services, pursuant to a resolution of the directors.

     SECTION 2.13.  Resignation.  Any director may resign at any time by sending
a  written  notice of such  resignation  to the home  office of the  Corporation
addressed  to the  Chairman  of the  Board or the  President.  Unless  otherwise
specified therein such resignation shall take effect upon receipt thereof by the
Chairman of the Board or the President.

     SECTION 2.14.  Presumption of Assent.  A director of the Corporation who is
present at a meeting of the Board of Directors at which action on any  corporate
matter is taken shall be presumed to have  assented to the action  taken  unless
his or her dissent or abstention  shall be entered in the minutes of the meeting
or unless he or she shall file his or her  written  dissent to such  action with
the person acting as the secretary of the meeting before the adjournment thereof

                                       8
<PAGE>

or shall  forward  such  dissent  by  registered  mail to the  Secretary  of the
Corporation  immediately  after the  adjournment  of the meeting.  Such right to
dissent shall not apply to a director who votes in favor of such action or fails
to make his dissent known at the meeting.

     SECTION 2.15.  Advisory   Directors.  The   Board  of   Directors   may  by
resolution  appoint advisory  directors to the Board of Directors,  who may also
serve as  directors  emeriti,  and shall have such  authority  and receive  such
compensation and reimbursement as the Board of Directors shall provide. Advisory
directors or directors  emeriti shall not have the authority to  participate  by
vote in the transaction of business.


                                  ARTICLE III.

                                   COMMITTEES

     SECTION 3.01.  Committees.  The  Board of Directors  may appoint from among
its members an Executive  Committee and other committees composed of one or more
directors  and  delegate to these  committees  any of the powers of the Board of
Directors,  except the power to authorize  dividends on stock,  elect directors,
issue  stock  other than as  provided  in the next  sentence,  recommend  to the
stockholders  any  action  which  requires  stockholder  approval,  amend  these
By-Laws,  or  approve  any  merger  or share  exchange  which  does not  require
stockholder approval.  The Chairman of the Board and Vice Chairman of the Board,
if any, shall be members of all  Committees  appointed with the exception of the
Audit  Committee.  The President  shall be a member of all Committees  appointed
with the exception of the Audit Committee and Personnel,  Compensation and Stock
Option Committee.  If the Board of Directors has given general authorization for
the issuance of stock  providing for or  establishing  a method or procedure for
determining the maximum number of shares to be issued,  a committee of the Board
of Directors,  in accordance with that general authorization or any stock option
or other plan or program adopted by the Board of Directors, may authorize or fix
the terms of stock subject to classification or  reclassification  and the terms
on which any stock may be issued, including all terms and conditions required or
permitted to be established or authorized by the Board of Directors.

     SECTION 3.02.  Committee   Procedure.  Each  committee  may  fix  rules  of
procedure  for its  business.  A majority of the  members of a  committee  shall
constitute a quorum for the transaction of business and the act of a majority of
those  present at a meeting at which a quorum is present shall be the act of the
committee.  The members of a committee  present at any  meeting,  whether or not
they  constitute  a quorum,  may  appoint a  director  to act in the place of an
absent  member.  Any action  required or permitted to be taken at a meeting of a
committee may be taken without a meeting,  if an unanimous written consent which
sets forth the action is signed by each member of the  committee  and filed with
the minutes of the committee. The members of a committee may conduct any meeting
thereof by  conference  telephone in accordance  with the  provisions of Section
2.11.

                                       9
<PAGE>

     SECTION 3.03.  Emergency.  In   the  event  of  a  state  of   disaster  of
sufficient  severity to prevent the  conduct and  management  of the affairs and
business of the Corporation by its directors and officers as contemplated by the
Charter  and  these  By-Laws,  any two or more  available  members  of the  then
incumbent  Executive  Committee shall  constitute a quorum of that Committee for
the full conduct and  management of the affairs and business of the  Corporation
in  accordance  with  the  provisions  of  Section  3.01.  In the  event  of the
unavailability,  at such time, of a minimum of two members of the then incumbent
Executive Committee,  the available directors shall elect an Executive Committee
consisting of any two members of the Board of Directors,  whether or not they be
officers of the  Corporation,  which two members shall  constitute the Executive
Committee for the full conduct and management of the affairs of the  Corporation
in accordance with the foregoing provisions of this Section.  This Section shall
be subject to implementation by resolution of the Board of Directors passed from
time to time for that purpose,  and any  provisions of these By-Laws (other than
this Section) and any  resolutions  which are contrary to the provisions of this
Section  or to the  provisions  of any such  implementary  resolutions  shall be
suspended until it shall be determined by any interim Executive Committee acting
under this  Section  that it shall be to the  advantage  of the  Corporation  to
resume the conduct and  management  of its  affairs and  business  under all the
other provisions of these By-Laws.


                                   ARTICLE IV.

                                    OFFICERS

     SECTION 4.01.  Executive  and Other Officers.  The Corporation shall have a
President,  a Secretary,  and a Treasurer who shall be the executive officers of
the  Corporation.  It may also have a Chairman of the Board; the Chairman of the
Board  shall be an  executive  officer if he or she is  designated  as the chief
executive officer of the Corporation. Provided the Corporation has a Chairman of
the Board it may also have a Vice  Chairman of the Board.  The Vice  Chairman of
the Board shall not be an  executive  officer of the  Corporation.  The Board of
Directors  may  designate  who shall serve as chief  executive  officer,  having
general supervision of the business and affairs of the Corporation,  or as chief
operating officer,  having supervision of the operations of the Corporation;  in
the absence of designation the President shall serve as chief executive  officer
and  chief  operating  officer.  It may also  have one or more  Vice-Presidents,
assistant officers,  and subordinate officers as may be established by the Board
of Directors.  A person may hold more than one office in the Corporation  except
that no person may serve  concurrently as both President and  Vice-President nor
Chairman  of the Board and Vice  Chairman of the Board of the  Corporation.  The
Chairman of the Board, the Vice Chairman of the Board and the President shall be
directors; the other officers may be directors.

     SECTION 4.02.  Chairman of the Board.  The Chairman of the Board, if one be
elected,  shall  preside at all  meetings of the Board of  Directors  and of the
stockholders  at which he or she shall be present;  and,  in general,  he or she
shall perform all such duties as are from time to time assigned to him or her by
the Board of Directors.

                                       10
<PAGE>

     SECTION 4.03.  Vice Chairman of the Board.  The Vice Chairman of the Board,
if one be elected, in the absence of the Chairman of the Board, shall preside at
all meetings of the Board of Directors  and of the  stockholders  at which he or
she shall be present;  and, in general,  he or she shall perform all such duties
as are from time to time assigned to him or her by the Board of Directors.

     SECTION 4.04.  President.  Unless  otherwise  provided by resolution of the
Board of Directors,  the President,  in the absence of the Chairman of the Board
and the  Vice-Chairman of the Board,  shall preside at all meetings of the Board
of Directors and of the stockholders at which he or she shall be present;  he or
she may sign and execute, in the name of the Corporation,  all authorized deeds,
mortgages,  bonds, contracts or other instruments,  except in cases in which the
signing and execution thereof shall have been expressly  delegated to some other
officer or agent of the  Corporation.  In general,  he or she shall perform such
other duties  customarily  performed by a president of a  corporation  and shall
perform  such other  duties and have such other  powers as are from time to time
assigned to him or her by the Board of Directors or the chief executive  officer
of the Corporation.

     SECTION 4.05.  Vice-Presidents.  The  Vice-President or Vice-Presidents, at
the  request  of  the  chief  executive  officer  or  the  President,  or in the
President's  absence or during his or her  inability to act,  shall  perform the
duties and exercise the  functions  of the  President,  and when so acting shall
have the powers of the President. If there be more than one Vice-President,  the
Board of Directors may determine which one or more of the Vice-Presidents  shall
perform  any of  such  duties  or  exercise  any of such  functions,  or if such
determination  is not  made by the  Board  of  Directors,  the  chief  executive
officer,  or the  President  may make such  determination;  otherwise any of the
Vice-Presidents  may  perform  any of  such  duties  or  exercise  any  of  such
functions.  Each  Vice-President  shall  perform such other duties and have such
other powers, and have such additional descriptive  designations in their titles
(if any),  as are from time to time  assigned to them by the Board of Directors,
the chief executive officer, or the President.

     SECTION 4.06.  Secretary.  The  Secretary  shall  keep the  minutes  of the
meetings of the  stockholders,  of the Board of Directors and of any committees,
in books provided for the purpose; he or she shall see that all notices are duly
given in accordance  with the provisions of these By-Laws or as required by law;
he or she shall be  custodian of the records of the  Corporation;  he or she may
witness any  document on behalf of the  Corporation,  the  execution of which is
duly  authorized,  see that the corporate seal is affixed where such document is
required or desired to be under its seal,  and, when so affixed,  may attest the
same.  In  general,  he or she  shall  perform  such  other  duties  customarily
performed by a secretary of a  corporation,  and shall perform such other duties
and have such other  powers as are from time to time  assigned  to him or her by
the Board of Directors, the chief executive officer, or the President.

     SECTION 4.07.  Treasurer.  The  Treasurer  shall  have  charge  of  and be
responsible  for  all  funds,  securities,  receipts  and  disbursements  of the
Corporation,  and shall  deposit,  or cause to be deposited,  in the name of the
Corporation, all moneys or other valuable effects in such banks, trust companies

                                       11
<PAGE>

or other  depositories as shall,  from time to time, be selected by the Board of
Directors;  he or she  shall  render  to the  President  and  to  the  Board  of
Directors,  whenever  requested,  an account of the  financial  condition of the
Corporation.  In general,  he or she shall perform such other duties customarily
performed by a treasurer of a  corporation,  and shall perform such other duties
and have such other  powers as are from time to time  assigned  to him or her by
the Board of Directors, the chief executive officer, or the President.

     SECTION 4.08.  Assistant   and  Subordinate  Officers.  The  assistant  and
subordinate  officers of the  Corporation  are all officers  below the office of
Vice-President,  Secretary, or Treasurer.  The assistant or subordinate officers
shall have such duties as are from time to time assigned to them by the Board of
Directors, the chief executive officer, or the President.

     SECTION 4.09.  Election,  Tenure  and  Removal of  Officers.  The  Board of
Directors  shall elect the officers of the  Corporation.  The Board of Directors
may from time to time  authorize any  committee or officer to appoint  assistant
and  subordinate  officers.  Election or appointment of an officer,  employee or
agent  shall  not of  itself  create  contract  rights.  All  officers  shall be
appointed to hold their offices, respectively,  during the pleasure of the Board
of Directors.  The Board of Directors  (or, as to any  assistant or  subordinate
officer,  any committee or officer  authorized  by the Board of  Directors)  may
remove an officer at any time.  The removal of an officer does not prejudice any
of his or her contract  rights.  The Board of Directors (or, as to any assistant
or  subordinate  officer,  any  committee or officer  authorized by the Board of
Directors)  may fill a vacancy  which  occurs in any  office  for the  unexpired
portion of the term.

     SECTION 4.10.  Election,  Tenure and  Removal of the  Chairman of the Board
and the Vice  Chairman of the  Board.  The  Board of  Directors  shall elect the
Chairman of the Board and the Vice Chairman of the Board, if any be elected. The
Chairman of the Board and the Vice  Chairman of the Board shall be  appointed to
hold their offices, respectively, for two years, but not beyond their respective
terms as directors.  The Board of Directors may remove the Chairman of the Board
and the Vice Chairman of the Board from their respective office at any time. The
removal of the Chairman of the Board and/or the Vice  Chairman of the Board does
not prejudice  his/their rights as a director and stockholder of the Corporation
conveyed by the Charter and By-Laws of the Corporation.

     SECTION 4.11.  Compensation.  The  Board of  Directors  shall have power to
fix the salaries and other  compensation and remuneration,  of whatever kind, of
all officers of the  Corporation.  No officer shall be prevented  from receiving
such  salary  by reason  of the fact  that he or she is also a  director  of the
Corporation. The Board of Directors may authorize any committee or officer, upon
whom the power of appointing  assistant and  subordinate  officers may have been
conferred, to fix the salaries,  compensation and remuneration of such assistant
and subordinate officers.

                                       12
<PAGE>


                                   ARTICLE V.

                                      STOCK

     SECTION 5.01.  Certificates  for  Stock.  Each  stockholder  is entitled to
certificates  which represent and certify the shares of stock he or she holds in
the Corporation.  Each stock  certificate  shall include on its face the name of
the  Corporation,  the name of the  stockholder  or other  person  to whom it is
issued, and the class of stock and number of shares it represents. It shall also
include  on  its  face  or  back  (a)  a  statement  of  any   restrictions   on
transferability  and a  statement  of  the  designations  and  any  preferences,
conversion  and other rights,  voting  powers,  restrictions,  limitations as to
dividends,  qualifications,  and terms and conditions of redemption of the stock
of each class which the  Corporation is authorized to issue,  of the differences
in the relative  rights and  preferences  between the shares of each series of a
preferred or special  class in series which the  Corporation  is  authorized  to
issue,  to the extent they have been set,  and of the  authority of the Board of
Directors to set the relative rights and  preferences of subsequent  series of a
preferred  or  special  class of  stock or (b) a  statement  which  provides  in
substance that the Corporation will furnish a full statement of such information
to any  stockholder on request and without  charge.  Such request may be made to
the  Secretary  or to its  transfer  agent.  Except as provided in the  Maryland
Uniform  Commercial  Code  -  Investment  Securities,  the  fact  that  a  stock
certificate does not contain or refer to a restriction on  transferability  that
is adopted  after the date of  issuance  does not mean that the  restriction  is
invalid or unenforceable. It shall be in such form, not inconsistent with law or
with the Charter,  as shall be approved by the Board of Directors or any officer
or officers designated for such purpose by resolution of the Board of Directors.
Each  stock  certificate  shall be  signed by the  Chairman  of the  Board,  the
President, or a Vice-President, and countersigned by the Secretary, an Assistant
Secretary,  the Treasurer,  or an Assistant  Treasurer.  Each certificate may be
sealed with the actual  corporate seal or a facsimile of it or in any other form
and the signatures may be either manual or facsimile  signatures.  A certificate
is valid and may be issued  whether or not an officer  who signed it is still an
officer  when it is  issued.  A  certificate  may not be issued  until the stock
represented by it is fully paid.

     SECTION 5.02.  Transfers.  The  Board of  Directors  shall  have  power and
authority to make such rules and regulations as it may deem expedient concerning
the issue,  transfer and  registration of certificates of stock; and may appoint
transfer  agents  and  registrars  thereof.  The  duties of  transfer  agent and
registrar may be combined.

     SECTION 5.03.  Record  Dates or Closing of  Transfer  Books.  The  Board of
Directors  may,  and shall have the sole  power to, set a record  date or direct
that the stock  transfer  books be closed for a stated period for the purpose of
making any proper  determination  with respect to stockholders,  including which
stockholders are entitled to request a special meeting of  stockholders,  notice
of a meeting  of  stockholders,  vote at a meeting  of  stockholders,  receive a
dividend,  or be allotted other rights.  The record date may not be prior to the
close of business  on the day the record  date is fixed nor,  subject to Section
1.06,  more than 90 days  before  the date on which  the  action  requiring  the
determination  will be taken;  the transfer books may not be closed for a period
longer than 20 days; and, in the case of a meeting of  stockholders,  the record

                                       13
<PAGE>

date or the closing of the transfer  books shall be at least ten days before the
date of the meeting.  Any shares of the  Corporation's own stock acquired by the
Corporation  between the record date for  determining  stockholders  entitled to
notice of or to vote at a meeting of  stockholders  and the time of the  meeting
may be voted at the  meeting by the  holder of record as of the record  date and
shall be counted in determining the total number of outstanding  shares entitled
to be voted at the meeting.

     SECTION 6.04.  Stock Ledger.  The Corporation shall maintain a stock ledger
which contains the name and address of each stockholder and the number of shares
of stock of each class which the stockholder  holds.  The stock ledger may be in
written  form or in any other form which can be  converted  within a  reasonable
time into written form for visual inspection. The original or a duplicate of the
stock ledger shall be kept at the offices of a transfer agent for the particular
class of stock, or, if none, at the principal office in the State of Maryland or
the principal executive offices of the Corporation.

     SECTION 5.05.  Certification  of Beneficial Owners.  The Board of Directors
may adopt by  resolution a procedure by which a stockholder  of the  Corporation
may certify in writing to the Corporation that any shares of stock registered in
the name of the stockholder are held for the account of a specified person other
than the  stockholder.  The resolution shall set forth the class of stockholders
who may certify;  the purpose for which the  certification may be made; the form
of certification and the information to be contained in it; if the certification
is with  respect to a record date or closing of the stock  transfer  books,  the
time after the record date or closing of the stock  transfer  books within which
the certification must be received by the Corporation;  and any other provisions
with respect to the procedure which the Board of Directors  considers  necessary
or desirable.  On receipt of a  certification  which complies with the procedure
adopted by the Board of Directors in accordance  with this  Section,  the person
specified  in  the   certification   is,  for  the  purpose  set  forth  in  the
certification,  the  holder  of record  of the  specified  stock in place of the
stockholder who makes the certification.

     SECTION 5.06.  Lost   Stock   Certificates.  The  Board  of  Directors  may
determine the  conditions  for issuing a new stock  certificate  in place of one
which is  alleged  to have been  lost,  stolen,  or  destroyed,  or the Board of
Directors may delegate such power to any officer or officers of the Corporation.
In their  discretion,  the Board of  Directors  or such  officer or officers may
require the owner of the certificate to give bond, with  sufficient  surety,  to
indemnify the  Corporation  against any loss or claim arising as a result of the
issuance of a new certificate.  In their  discretion,  the Board of Directors or
such officer or officers may refuse to issue such new certificate  save upon the
order of some court having jurisdiction in the premises.

                                       14
<PAGE>


                                   ARTICLE VI.

                                     FINANCE

     SECTION 6.01.  Checks,  Drafts, Etc.  All checks, drafts and orders for the
payment of money, notes and other evidences of indebtedness,  issued in the name
of the Corporation,  shall, unless otherwise provided by resolution of the Board
of  Directors,  be  signed  by the  Chairman  of the  Board,  the  President,  a
Vice-President,  an  Assistant  Vice-President,   the  Treasurer,  an  Assistant
Treasurer, the Secretary or an Assistant Secretary.

     SECTION 6.02.  Annual   Statement  of  Affairs.  The   President  or  chief
accounting  officer shall prepare  annually a full and correct  statement of the
affairs of the Corporation, to include a balance sheet and a financial statement
of operations  for the preceding  fiscal year. The statement of affairs shall be
submitted at the annual meeting of the  stockholders  and,  within 20 days after
the meeting, placed on file at the Corporation's principal office.

     SECTION 6.03.  Fiscal Year. The fiscal year of the Corporation shall be the
12calendar  months  period  ending  December 31 in each year,  unless  otherwise
provided by the Board of Directors.

     SECTION 6.04.  Dividends.  If  declared  by the Board of  Directors  at any
meeting  thereof,  the  Corporation  may pay  dividends  on its  shares in cash,
property,  or in shares of the  capital  stock of the  Corporation,  unless such
dividend is contrary to law or to a restriction contained in the Charter.

     SECTION 6.05.  Loans.  No  loans  shall  be  contracted  on  behalf  of the
Corporation and no evidence of  indebtedness  shall be issued in its name unless
authorized by the Board of Directors.  Such authority may be general or confined
to specific instances.

     SECTION 6.06.  Deposits.  All   funds  of  the  Corporation  not  otherwise
employed shall be deposited  from time to time to the credit of the  Corporation
in any of its duly authorized depositories as the Board of Directors may select.


                                  ARTICLE VII.

                                 INDEMNIFICATION

     SECTION 7.01.  Procedure.  Any  indemnification,  or payment of expenses in
advance of the final disposition of any proceeding,  shall be made promptly, and
in any event within 60 days, upon the written request of the director or officer
entitled  to seek  indemnification  (the  "Indemnified  Party").  The  right  to
indemnification  and advances  hereunder shall be enforceable by the Indemnified
Party in any court of competent jurisdiction, if (i) the Corporation denies such
request,  in whole or in part, or (ii) no disposition  thereof is made within 60
days. The  Indemnified  Party's costs and expenses  incurred in connection  with

                                       15
<PAGE>

successfully  establishing his or her right to  indemnification,  in whole or in
part, in any such action shall also be reimbursed by the  Corporation.  It shall
be a defense to any action for advance for expenses that (a) a determination has
been made that the facts then  known to those  making  the  determination  would
preclude  indemnification  or (b) the  Corporation  has not received both (i) an
undertaking  as  required  by law to repay such  advances  in the event it shall
ultimately be determined  that the standard of conduct has not been met and (ii)
a written  affirmation by the Indemnified Party of such Indemnified Party's good
faith belief that the standard of conduct necessary for  indemnification  by the
Corporation has been met.

     SECTION 7.02.  Exclusivity,   Etc.  The   indemnification  and  advance  of
expenses provided by the Charter and these By-Laws shall not be deemed exclusive
of any other  rights to which a person  seeking  indemnification  or  advance of
expenses may be entitled under any law (common or statutory),  or any agreement,
vote of  stockholders  or  disinterested  directors or other  provision  that is
consistent with law, both as to action in his or her official capacity and as to
action in another  capacity  while holding office or while employed by or acting
as agent for the Corporation,  shall continue in respect of all events occurring
while a person was a director  or officer  after such  person has ceased to be a
director  or  officer,  and shall  inure to the  benefit of the  estate,  heirs,
executors and administrators of such person. The Corporation shall not be liable
for any payment under this By-Law in connection  with a claim made by a director
or  officer to the extent  such  director  or  officer  has  otherwise  actually
received payment under insurance policy,  agreement,  vote or otherwise,  of the
amounts otherwise  indemnifiable  hereunder.  All rights to indemnification  and
advance of expenses under the Charter of the  Corporation and hereunder shall be
deemed to be a contract  between the Corporation and each director or officer of
the  Corporation  who serves or served in such  capacity  at any time while this
By-Law is in effect.  Nothing herein shall prevent the amendment of this By-Law,
provided  that no  such  amendment  shall  diminish  the  rights  of any  person
hereunder with respect to events occurring or claims made before its adoption or
as to claims made after its adoption in respect of events  occurring  before its
adoption.  Any  repeal  or  modification  of this  By-Law  shall  not in any way
diminish any rights to  indemnification  or advance of expenses of such director
or officer or the obligations of the Corporation  arising hereunder with respect
to events  occurring,  or claims made, while this By-Law or any provision hereof
is in force.

     SECTION 7.03.  Severability;      Definitions.  The      invalidity      or
unenforceability  of any  provision  of this  Article  VII shall not  affect the
validity or  enforceability  of any other  provision  hereof.  The phrase  "this
By-Law" in this Article VII means this Article VII in its entirety.


                                  ARTICLE VIII.

                                SUNDRY PROVISIONS

     SECTION 8.01.  Books  and Records.  The  Corporation shall keep correct and
complete books and records of its accounts and  transactions  and minutes of the
proceedings of its  stockholders  and Board of Directors and of any executive or


                                       16
<PAGE>

other committee when exercising any of the powers of the Board of Directors. The
books and records of the Corporation may be in written form or in any other form
which can be  converted  within a  reasonable  time into written form for visual
inspection.  Minutes  shall be recorded in written form but may be maintained in
the form of a  reproduction.  The original or a certified  copy of these By-Laws
shall be kept at the principal office of the Corporation.

     SECTION 8.02.  Corporate  Seal.  The  Board of  Directors  shall  provide a
suitable seal, bearing the name of the Corporation, which shall be in the charge
of the  Secretary.  The Board of Directors may  authorize one or more  duplicate
seals and provide for the custody  thereof.  If the  Corporation  is required to
place its corporate seal to a document, it is sufficient to meet the requirement
of any law,  rule, or regulation  relating to a corporate seal to place the word
"(seal)" adjacent to the signature of the person authorized to sign the document
on behalf of the Corporation.

     SECTION 8.03.  Bonds.  The  Board of  Directors  may require  any  officer,
agent  or  employee  of the  Corporation  to  give a  bond  to the  Corporation,
conditioned upon the faithful  discharge of his or her duties,  with one or more
sureties and in such amount as may be satisfactory to the Board of Directors.

     SECTION 8.04.  Voting   Stock  in  Other   Corporations.  Stock   of  other
corporations or associations,  registered in the name of the Corporation, may be
voted by the  President,  a  Vice-President,  or a proxy  appointed by either of
them.  The Board of Directors,  however,  may by  resolution  appoint some other
person to vote such shares,  in which case such person shall be entitled to vote
such shares upon the production of a certified copy of such resolution.

     SECTION 8.05.  Mail.  Any  notice or other  document  which is  required by
these  By-Laws  to be mailed  shall be  deposited  in the United  States  mails,
postage prepaid.

     SECTION 8.06.  Contracts   and  Agreements.  To  the  extent  permitted  by
applicable  law,  and except as  otherwise  prescribed  by the  Charter or these
By-Laws, the Board of Directors may authorize any officer,  employee or agent of
the Corporation to enter into any contract or execute and deliver any instrument
in the name of and on behalf of the  Corporation.  Such authority may be general
or confined to  specific  instances.  A person who holds more than one office in
the Corporation  may not act in more than one capacity to execute,  acknowledge,
or  verify  an  instrument  required  by law to be  executed,  acknowledged,  or
verified by more than one officer.

     SECTION 8.07.  Reliance.  Each  director,  officer,  employee and agent of
the  Corporation  shall, in the performance of his or her duties with respect to
the  Corporation,  be entitled  to rely on any  information,  opinion  report or
statement,  including  financial  statement or other financial data, prepared or
presented  by an officer  or  employee  of the  Corporation  whom the  director,
officer,  employee or agent reasonably  believes to be reliable and competent in
the matters presented, by a lawyer,  certified public accountant or other person
as to a matter  which  the  director,  officer,  employee  or  agent  reasonably
believes to be within the person's  professional  or expert  competence  or by a
committee of the Board on which the director,  officer,  employee and agent does

                                       17
<PAGE>

not serve,  as to a matter  within its  designated  authority,  if the director,
officer, employee or agent believes the committee to merit confidence.

     SECTION 8.08.  Amendments.  These By-Laws may be repealed, altered, amended
or  rescinded  and new  by-laws may be adopted  (a) by the  stockholders  of the
Corporation  (considered for this purpose as one class) by the affirmative  vote
of not less than 80% of all the  votes  entitled  to be cast by the  outstanding
shares  of  capital  stock  of the  Corporation  generally  in the  election  of
directors which are cast on the matter at any meeting of the stockholders called
for that  purpose  (provided  that  notice of such  proposal  is included in the
notice of such meeting) or (b) by the Board of Directors by the affirmative vote
of not less than  two-thirds  of the  Board of  Directors  at a meeting  held in
accordance with the provisions of these By-Laws.











                                       18


                                                                    Exhibit 99.1

                                  PRESS RELEASE

                   For Immediate Release - September 28, 1999


FOR MORE INFORMATION, CONTACT:

John M. Bond, Jr. - President and Chief Executive Officer, Columbia Bancorp
(410) 465-4800

Stephen A. Horvath - President and Chief Operating Officer, Suburban Bancshares
(301) 474-6694


                 COLUMBIA BANCORP AND SUBURBAN BANCSHARES, INC.
                      ANNOUNCE DEFINITIVE MERGER AGREEMENT

Columbia,  Maryland,  September  28,  1999 - Columbia  Bancorp  (Nasdaq - CBMD),
headquartered in Columbia,  Maryland,  and Suburban  Bancshares,  Inc. (Nasdaq -
SBNK)  headquartered in Greenbelt,  Maryland,  announced jointly today that they
have signed a definitive merger agreement.

     The definitive  merger  agreement  provides for the merger of Suburban into
Columbia.  Columbia will exchange between  2,482,000 and 2,642,000 shares of its
common  stock for all  outstanding  shares of  Suburban.  Based upon the closing
price of Columbia shares on September 27, 1999 of $12.875, the transaction has a
value of approximately  2.63 million Columbia common shares worth $33.9 million,
or $3.00 per share of  Suburban.  The deal  value  represents  a 37%  premium to
market for  shareholders  of Suburban  based on the  closing  price of $2.188 at
September  27,  1999.  The  merger is  intended  to be a tax-free  exchange  for
Suburban shareholders and will be accounted for as a pooling of interests.

     Upon completion of the merger, which is subject to approval by shareholders
of both companies and by regulatory agencies,  Suburban's  subsidiary,  Suburban
Bank of Maryland,  will merge into  Columbia's  subsidiary,  The Columbia  Bank.
Although  the two banks serve  adjoining  counties  in the  Baltimore-Washington
Corridor,  there is very little  market  overlap and all branch  locations  will
remain open.  Following the merger, The Columbia Bank will operate  twenty-three
branches  (nine in  Howard  County,  six in  Baltimore  County,  five in  Prince
George's County, and three in Montgomery County).

     "We are very pleased to be joining  forces with  Suburban,  an  institution
with deep roots in the suburban  Washington markets of Maryland"  commented John
M. Bond, Jr.,  President and CEO of Columbia.  "This merger will further enhance


<PAGE>

our  presence  in  the  prosperous  Baltimore-Washington  Corridor  and  provide
excellent  opportunities  for continued  rapid  growth."  Since opening in 1988,
Columbia has maintained a compound annual growth rate of 30%.

     Winfield Kelly,  Chairman and CEO of Suburban,  noted,  "The combination of
Suburban's  strong  commercial  banking  franchise  coupled with the  additional
capabilities  of Columbia  in consumer  banking  and  residential  lending  will
provide  the  foundation  for  continued  aggressive  growth  in the  Washington
suburban market."

     Following  the merger,  Mr. Kelly will serve as Chairman,  James R. Moxley,
Jr. as Vice  Chairman,  Herschel L.  Langenthal  as  Chairman  of the  Executive
Committee and Mr. Bond as President and CEO of Columbia. Mr. Stephen A. Horvath,
President  and Chief  Operating  Officer of Suburban  Bancshares,  will serve as
Executive Vice President of the Washington Region for The Columbia Bank.

     Columbia and Suburban anticipate  substantial merger cost savings resulting
from combined  operations and increased revenue from offering Columbia's broader
product line in markets served by Suburban.

     The  following  chart  compares  Columbia  and  Suburban at June 30,  1999.
Pro-forma (Dollars in thousands) Columbia Suburban Combined


<TABLE>
<S>                        <C>                <C>                     <C>

Total Assets               $457,255           $222,575                $679,830
Loans                       293,959            135,195                 429,154
Deposits                    356,627            186,578                 543,205
Equity                       39,021             20,354                  59,555

</TABLE>

     This news release  contains,  among other things,  certain  forward-looking
statements   regarding  the  combined   company   following  the  merger.   Such
forward-looking statements involve certain risks and uncertainties,  including a
variety of  factors  that may cause the  combined  company's  actual  results to
differ materially from the anticipated  results or other expectations  expressed
in such forward-looking statements.

     Columbia Bancorp,  headquartered in Columbia,  Maryland,  is a bank holding
company and parent company of The Columbia Bank, a commercial bank. The Columbia
Bank  currently  operates  fourteen  banking  offices  and will open a fifteenth
banking  office in the fourth  quarter  1999.  The Columbia Bank provides a full

                                       2
<PAGE>

range of financial  services to consumers  and  businesses.  Columbia  Bancorp's
Common Stock is traded on the National  Market tier of The Nasdaq Stock MarketSM
under the symbol "CBMD".

     Suburban  Bancshares,  headquartered  in  Greenbelt,  Maryland,  is a  bank
holding  company and parent  company of Suburban Bank of Maryland,  a commercial
bank.  Suburban  Bank of  Maryland  operates  eight  banking  offices.  Suburban
Bancshares'  Common  Stock is traded on the Small Cap tier of The  Nasdaq  Stock
MarketSM under the symbol "SBNK".

























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