VALLEY SYSTEMS INC
DEFM14C, 1998-12-15
SANITARY SERVICES
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                            SCHEDULE 14C INFORMATION

             INFORMATION STATEMENT PURSUANT TO SECTION 14(C) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

Check the appropriate box:

/ /  Preliminary Information Statement
/ /  Confidential, for use of the Commission only (as permitted by Rule 14c-5(d)
     (2)
/X/  Definitive Information Statement

                              VALLEY SYSTEMS, INC.
                (Name of Registrant As Specified In Its Charter)

Payment of Filing Fee (Check the appropriate box):

/ /  No fee required.
/X/  Fee computed on table below per Exchange Act Rules 14c-5(g) and 0-11.

1)   Title of each class of  securities  to which  transaction  applies:  Common
     Stock; Series C Preferred Stock

2)   Aggregate  number of securities  to which  transaction  applies:  7,906,617
     shares of Common Stock; 55,000 shares of Series C Preferred Stock

3)   Per unit price or other underlying value of transaction  computed  pursuant
     to Exchange  Act Rule 0-11 (Set forth the amount on which the filing fee is
     calculated  and state  how it was  determined):  $29,800,771  consideration
     received for sale of assets

4)   Proposed maximum aggregate value of transaction: $29,800,771

5)   Total Fee Paid: $5,960.15

/X/  Fee paid previously with preliminary materials.

/ /  Check box if any  part  of the fee is offset as provided  by  Exchange  Act
     Rule 0-11(a) (2) and identify the filing for which the  offsetting  fee was
     paid  previously.  Identify the previous filing by  registration  statement
     number, or the Form or Schedule and the date of its filing.

1)   Amount Previously Paid: N/A

2)   Form, Schedule or Registration Statement No.: N/A

3)   Filing Party: N/A

4)   Date Filed: N/A


<PAGE>



                              INFORMATION STATEMENT

                              VALLEY SYSTEMS, INC.
                            11580 Lafayette Drive, NW
                            Canal Fulton, Ohio 44614


                  WE ARE NOT ASKING YOU FOR A PROXY AND YOU ARE
                        REQUESTED NOT TO SEND US A PROXY

         THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
AND  EXCHANGE  COMMISSION  NOR HAS THE  COMMISSION  PASSED UPON THE  FAIRNESS OR
MERITS OF SUCH  TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY OF THE INFORMATION
CONTAINED IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

         This  Information  Statement  is furnished by the Board of Directors of
Valley  Systems,  Inc.,  a Delaware  corporation  ("Valley"),  to the holders of
record at the close of  business on  November,  23,  1998 (the  "Consent  Record
Date") of  Valley's  outstanding  Common  Stock,  par value  $.01 per share (the
"Common  Stock"),  pursuant  to Rule  14c-2  promulgated  under  the  Securities
Exchange  Act of 1934,  as amended  (the  "Exchange  Act").  The purpose of this
Information  Statement is to inform Valley's stockholders of certain action that
has been taken by Valley  pursuant to approval of its Board of Directors  and by
the written  consent of the holders of a majority of the  outstanding  shares of
Common Stock and Series C Preferred Stock of Valley, voting together as a single
class. This Information  Statement is being mailed on or about December 14, 1998
to the stockholders of record of Valley as of the Consent Record Date.

         As described in more detail in this Information Statement, the proposed
actions involve (1) the sale (the "Sale") of substantially  all of the assets of
Valley and of its wholly-owned subsidiary, Valley Systems of Ohio, Inc., an Ohio
corporation  (the  "Subsidiary")  (Valley  and the  Subsidiary  are  hereinafter
collectively  referred to as the "Company"),  to HydroChem  Industrial Services,
Inc.  ("HydroChem"),  a  Delaware  corporation,  (2) the  approval  of a Plan of
Liquidation and Dissolution  (the "Plan") for the Company,  and (3) the approval
of an amendment (the  "Amendment") to Valley's  Certificate of  Incorporation to
change  Valley's name to VSI Liquidation  Corp. if the Sale is consummated.  The
Board of Directors believes that the Sale and the Plan are fair to the Company's
stockholders.  The Sale, the Plan and the Amendment are described in more detail
below under the captions "THE SALE",  "PLAN OF LIQUIDATION AND  DISSOLUTION" and
"AMENDMENT TO CERTIFICATE OF INCORPORATION OF VALLEY SYSTEMS, INC."

         The Company is not seeking the consent,  authorization  or proxy of its
stockholders  with respect to approval of the Sale or the Plan.  Pursuant to the
Company's  Certificate of  Incorporation,  there are 12 million shares of Common
Stock and 2 million shares of Preferred Stock authorized for issuance. As of the
Consent  Record Date,  the Company had  outstanding  7,906,617  shares of Common
Stock and 55,000  shares of Series C Preferred  Stock.  The Common Stock and the
Series C  Preferred  Stock are the only  outstanding  classes  of the  Company's
authorized securities.

<PAGE>

         The Sale and the Plan are each subject to the approval of a majority of
the shares of Common  Stock and a majority  of the shares of Series C  Preferred
Stock,  voting together as a single class. Each share of Common Stock and Series
C  Preferred  Stock will have one vote.  The Sale was  approved  by the Board of
Directors  on  September  8,  1998  and the Plan was  approved  by the  Board of
Directors on December 11, 1998.  The Sale and the Plan were each approved by the
written  consent of Rollins  Investment  Fund,  the holder of a majority  of the
outstanding  shares of Common Stock,  and Rollins  Holding  Company,  Inc.,  the
holder of all of the outstanding shares of Series C Preferred Stock, on December
11, 1998. This  Information  Statement  serves as notice of such approval to the
Company's stockholders pursuant to Delaware General Corporation Law ss. 228.

         This  Information  Statement is  accompanied by a copy of the Company's
Form 10-K, as amended,  for the fiscal year ended June 30, 1998,  filed with the
Securities and Exchange  Commission ("SEC") on September 28, 1998, and a copy of
the Company's Form 10-Q for the quarter ended September 30, 1998, filed with the
SEC on October 29, 1998.

         The date of this Information Statement is December 14, 1998.



<PAGE>


                           FORWARD-LOOKING INFORMATION

         Statements  contained  in  this  Information  Statement  that  are  not
historical  facts are  forward-looking  statements  within  the  meaning  of the
Private  Securities  Litigation  Reform Act of 1995.  In addition,  the Company,
through its senior management,  from time to time makes  forward-looking  public
statements  concerning  expected  future  operations and  performance  and other
developments.   Such  forward-looking   statements  are  necessarily   estimates
reflecting  the  Company's  best  judgment  based upon current  information  and
involve a number of  significant  risks and  uncertainties,  and there can be no
assurance   that  other   factors   will  not  affect  the   accuracy   of  such
forward-looking statements. While it is impossible to identify all such factors,
factors  which  could  cause  actual  results  to differ  materially  from those
estimated  by the  Company  include,  but  are not  limited  to,  the  Company's
incurring   expenses  in  connection  with  its  winding  up,   liquidation  and
dissolution which are greater than those anticipated,  changes in the regulation
of the industrial  cleaning  industry at either or both of the federal and state
levels,  competitive  pressures  in the  industrial  cleaning  industry  and the
Company's  response thereto,  the general  conditions in the economy and capital
markets,  and other  factors  which may be  identified  from time to time in the
Company's SEC filings and in other public announcements of the Company.

                    BENEFICIAL OWNERSHIP OF VOTING SECURITIES

         The following  table sets forth certain  information as of November 15,
1998 with respect to the beneficial  ownership of the Common Stock and Preferred
Stock of the Company by each beneficial owner of more than 5% of the outstanding
shares of each class. In addition,  this table includes the  outstanding  voting
securities  beneficially  owned by the executive  officers and Directors and the
number of shares owned by Directors  and executive  officers as a group.  Unless
otherwise  indicated,  the owners  have sole  voting and  investment  power with
respect to their respective shares.
<TABLE>
<CAPTION>
Name and Address of                                           Number of Shares         Percentage of
Beneficial Owner                         Position            Beneficially Owned        Class Owned
- -------------------                      --------            ------------------        -------------
<S>                                      <C>                    <C>                      <C>    
COMMON STOCK:
Rollins Investment Fund(1)               Stockholder            8,003,945 (2)(3)
                                                                                          75.3%
R. Randall Rollins (1)                   Stockholder            8,003,945 (2)(3)          75.3%
Gary W. Rollins(1)                       Stockholder            8,003,945 (2)(3)          75.3%
Ed Strickland(4) (8)                     President/CEO            192,000                  1.8%
Dennis D. Sheets (4) (9)                 Vice President/CFO        60,000                 --(5)
Joe M. Young(1) (6) (10)                 Director                  24,000                 --(5)
Allen O. Kinzer(4) (11)                  Director                  17,800                 --(5)
All officers and directors as a                                 8,287,745 (2)(3)(6)       78.1%
      group (4 persons)

SERIES C PREFERRED STOCK:
Rollins Holding Company, Inc.(1)(7)      Stockholder               55,000                100.0%
</TABLE>

(1)  Addresses are c/o Rollins  Investment Fund, P.O. Box 647, Atlanta,  Georgia
     30301.

(2)  Includes  2,314,000  shares  that  are  subject  to  outstanding   warrants
     currently exercisable by Rollins Investment Fund (RIF).
<PAGE>

(3)  RIF  beneficially  owns  an  aggregate   8,003,945  shares  (including  the
     2,314,000 shares subject to outstanding  warrants currently  exercisable by
     RIF) of the  Company's  Common  Stock  with  respect  to which RIF has sole
     voting and  dispositive  power.  Given his respective  interest in RIF as a
     general manager  thereof,  as co-executor of the Estate of O. Wayne Rollins
     (the "Estate") (with the power to control the Estate in its entirety),  and
     as  sole   trustee  of  five  trusts  of  which  his  five   children   are
     beneficiaries,  R. Randall Rollins has shared voting and dispositive  power
     with  respect  to the  entire  8,003,945  shares  held  by RIF.  Given  his
     respective  interest in RIF as a general partner thereof, as co-executor of
     the Estate (with the power to control the Estate in its  entirety),  and as
     sole trustee of four trusts of which his four  children are  beneficiaries,
     Gary W. Rollins has shared voting and dispositive power with respect to the
     entire  8,003,945  shares held by RIF. Given each  individual's  ability to
     influence the  disposition  of all of RIF's  holdings,  they have deemed it
     appropriate to report beneficial ownership on a shared basis for the entire
     number of shares held by RIF.

(4)  Addresses are c/o Valley Systems,  Inc.,  P.O. Box 603, Canal Fulton,  Ohio
     44614.

(5)  Owns less than 1% of the Company's Common Stock.

(6)  Joe M. Young, a director of the Company,  is General Manager of RIF and was
     appointed  to the Board of  Directors  of the  Company  pursuant to a right
     guaranteed  to RIF in  connection  with its purchase of Common Stock of the
     Company in December 1991. Mr. Young disclaims  beneficial  ownership of the
     shares held by RIF,  although  due to his  affiliation  with RIF, and RIF's
     right to name a director of the  Company,  those shares are included in the
     total reported for all officers and directors as a group.

(7)  Rollins Holding Company, Inc. is an affiliate of RIF.

(8)  Includes  80,000 shares subject to options which are presently  exercisable
     or  will  become  exercisable  within  60  days  after  the  date  of  this
     Information Statement.  Excludes 20,000 shares subject to options which are
     not presently  exercisable and will not become  exercisable  within 60 days
     after the date of this Information Statement.

(9)  Includes  20,000 shares subject to options which are presently  exercisable
     or  will  become  exercisable  within  60  days  after  the  date  of  this
     Information  Statement.  Excludes 5,000 shares subject to options which are
     not presently  exercisable and will not become  exercisable  within 60 days
     after the date of this Information Statement.

(10) Includes  24,000 shares subject to options which are presently  exercisable
     or  will  become  exercisable  within  60  days  after  the  date  of  this
     Information  Statement.  Excludes 6,000 shares subject to options which are
     not presently  exercisable and will not become  exercisable  within 60 days
     after the date of this Information Statement.

(11) Includes  16,000 shares subject to options which are presently  exercisable
     or  will  become  exercisable  within  60  days  after  the  date  of  this
     Information  Statement.  Excludes 4,000 shares subject to options which are
     not presently  exercisable and will not become  exercisable  within 60 days
     after the date of this Information Statement.



<PAGE>


                             SELECTED FINANCIAL DATA

     Dollars in thousands, except per share data. Information is presented as of
or for years ended June 30, as appropriate,
<TABLE>
<CAPTION>
                                               1998         1997          1996           1995           1994
                                             ---------    ---------     ----------     --------       ---------
<S>                                       <C>          <C>           <C>            <C>            <C> 
Sales                                     $    24,431  $    23,088   $     21,875   $     24,231   $   27,494
Gross profit                                    9,040        8,559          6,853          8,562        6,291
Selling,   general  and   administrative        7,145        7,268          7,254          7,155        8,830
   expenses
Litigation settlements and related fees             -         (752)             -              -        1,351
Restructuring charges                               -            -              -              -        3,548
Interest expense                                  593          592            572            895        1,506
Net income (loss)                               1,302        1,451           (973)           512       (8,539)
Earnings (loss) per common share:  basic         0.12         0.13          (0.16)          0.02        (1.31)
   and diluted
Total assets                                   15,934       14,568         15,123         15,704       19,740
Total long-term debt                            7,585        7,235          7,021          5,858       10,194
Book value per common share               $       .68  $       .56   $        .48   $        .64   $     (.03)
Ratio of earnings to fixed charges               3.20         3.45              *              *            *
</TABLE>

*This information is not required to be included herein.

                 MARKET AND MARKET PRICE FOR VALLEY COMMON STOCK

         Valley  Common  Stock is listed  under the  symbol  VALE on The  Nasdaq
SmallCap Market.  Set forth below are the high and low reported sales prices per
share of Valley Common Stock on The Nasdaq  SmallCap  Market on (i) September 8,
1998,  the last business date  preceding the  announcement  of the signing of an
agreement between the Company and HydroChem, and (ii) December 9, 1998, the most
recent practicable date such information could be obtained:

                                       Per Share of
                                      Valley Common Stock
                                      -------------------  
Date                                   High            Low
- ----                                   ----            ---
September 8, 1998..................... $31/32          $31/32    
December 9, 1998...................... $2              $2              
                                     

         The following  table sets forth certain  information as to the high and
low  reported  sale  prices  per share of Valley  Common  Stock for the  periods
indicated.  The prices for Valley  Common  Stock are as  reported  on The Nasdaq
SmallCap Market.  Valley has never paid dividends on its capital stock. Valley's
credit  agreements  include  provisions  which  restrict  the  payment  of  such
dividends.

                                                     Per Share of
                                                  Valley Common Stock
                                                  -------------------  
Quarter Ended                                 High                     Low
- -------------                                 ----                     ---
9/30/96....................................  $ 1 9/16                $  5/8    
12/31/96...................................  $ 1 7/16                $ 15/16   
3/31/97....................................  $ 1 9/16                $ 15/16
6/30/97....................................  $ 1 11/16               $ 7/8
9/30/97....................................  $ 1 3/4                 $ 1 15/32
12/31/97...................................  $ 1 3/4                 $  3/4
3/31/98....................................  $ 1 3/16                $  7/8
6/30/98....................................  $ 1 1/2                 $ 15/16
9/30/98....................................  $ 2 11/16               $ 15/16
12/31/98 (through December 9, 1998) .......  $ 2                     $ 2
<PAGE>

         As of the Consent  Record  Date,  there were  approximately  222 record
holders of Valley Common Stock, including depository companies which hold shares
for certain beneficial owners.

                            COMMON STOCK REPURCHASES

         Since July 1, 1996, Valley has repurchased 500,000 shares of its Common
Stock on the open market.  The purchase prices paid by Valley for the securities
purchased  ranged  from $1.00 per share to $1.25 per share.  All such  purchases
were made during the fiscal year ended June 30, 1997,  and the average  purchase
price  paid for such  shares  of  Common  Stock  during  each  quarterly  period
beginning on or after July 1, 1996 during which such  purchases were made is set
forth below:

Quarter Ended                        Average Purchase Price
9/30/96..........................           $1.078
12/31/96.........................           $1.146
3/31/97..........................           $1.151
6/30/97..........................           $1.051

                                    THE SALE

General

         On  September  8, 1998,  the  Company  entered  into an Asset  Purchase
Agreement with HydroChem. This Asset Purchase Agreement was amended and restated
on December 11, 1998 (the "Agreement"). Pursuant to the Agreement, HydroChem has
agreed  to  purchase  substantially  all  of the  Company's  assets  and  assume
substantially  all of  the  Company's  outstanding  liabilities.  A copy  of the
Agreement  is attached to this  Information  Statement as Appendix A. The stated
purchase  price to be paid by HydroChem is  approximately  $29.8  million,  with
$25.8 million  payable in cash at the closing (the  "Closing") and the remaining
$4 million to be deposited into escrow and held pursuant to an Escrow  Agreement
(the  "Escrow  Agreement").  A copy of the Escrow  Agreement is attached to this
Information  Statement as Appendix B. In the event that the net assets reflected
on the Company's  balance  sheet at Closing are greater or less than  $5,353,593
(which was the amount of net assets at June 30, 1998),  any excess or deficiency
shall be paid to the Company (in the case of an excess) or to HydroChem  (in the
case of a deficiency)  as an adjustment  to the purchase  price.  See "THE ASSET
PURCHASE AGREEMENT - Purchase Price Adjustment."

         As of October 31, 1998, the Company's net assets were $6,503,224.
<PAGE>

The Escrow Agreement

         Prior to the  Closing,  the Company and  HydroChem  will enter into the
Escrow Agreement,  pursuant to which HydroChem will, at the Closing,  deposit $4
million into an escrow  account.  The escrowed funds held pursuant to the Escrow
Agreement will secure HydroChem's rights to indemnification under the Agreement,
including  indemnification  with  respect  to  certain  potential  environmental
expenses  and  remediation  cost  and the  collectibility  of  certain  accounts
receivable the  collectibility  of which are guaranteed by the Company.  At such
time as the Company  delivers to HydroChem a certificate  to the effect that the
Company has completed environmental remediation as required by the Agreement (if
any), an amount equal to $1 million,  less the sum of (i) the aggregate  cost of
such environmental  remediation and (ii) the aggregate amount of other claims of
HydroChem  subject  to  indemnification  under  the  Agreement  in  excess of $3
million,  shall be released to the Company  from  escrow.  If (i) and (ii) above
exceed $1 million,  the excess will result in claims  against the  remaining  $3
million held in escrow. In addition, provided that any disputes existing on each
of the first and second  anniversaries  of the Agreement,  respectively,  do not
exceed  specified  amounts,  then an additional $1 million of the escrowed funds
will be released  following each such  anniversary,  reduced in each instance by
payments  previously  made  in  satisfaction  of the  Company's  indemnification
obligation.  If there are no claims by HydroChem against all or a portion of the
escrowed funds on the third  anniversary  of the  Agreement,  then the remaining
escrowed funds will be released to the Company. To the extent disputed claims do
exist, an amount equal to the disputed amount will continue to be held in escrow
until the claim is fully resolved.  The escrowed funds will be HydroChem's  sole
recourse in connection with claims (other than fraud) under the Agreement.

Estimated Expenses; Distribution of Sale Proceeds

         The  Company  currently   estimates  that  expenses  of  effecting  the
transaction and  liquidating the Company over the next several years,  including
legal  and   accounting   fees,   income  taxes  (net  of  net  operating   loss
carryforwards),  and liabilities not assumed by HydroChem, will be approximately
$4.2 million.  As a result, the Company  anticipates there will be approximately
$21.6 million (exclusive of escrowed funds) available  following payment of such
expenses and liabilities. Of this amount,  approximately $380,000 is expected to
be utilized to redeem outstanding employee stock options. Each stock option will
be redeemed at a price the Board  estimates  to be the fair market  value of one
share of Common Stock less the exercise  price of the option.  As of the Consent
Record Date, options to purchase 377,280 shares were outstanding,  at a weighted
average  exercise  price of  $1.50  per  share.  All such  options,  vested  and
unvested,  are  expected to be  redeemed.  In  addition,  certain  officers  and
employees  will  receive  a  retention  bonus,  estimated  to  be  approximately
$165,000.  Also,  in  addition,  approximately  $5.5 million will be paid to the
Company's  sole  preferred   stockholder,   Rollins  Holding  Company,  Inc.  to
repurchase  all of the Company's  outstanding  preferred  stock.  This amount is
equal to the  aggregate  liquidation  preference  of the  Company's  outstanding
preferred stock plus accrued,  unpaid dividends thereon (assuming a Closing date
of January 5, 1999).  Rollins Holding  Company,  Inc. is an affiliate of Rollins
Investment Fund, the Company's largest common  stockholder,  and of Joe Young, a
Director of the Company.  The remaining  funds,  anticipated to be approximately
$16.8  million  (which  includes  approximately  $1.25  million  of  anticipated

<PAGE>

earnings  subsequent to June 30,  1998),  will be  distributed  to the Company's
common  stockholders  as soon  after the  Closing  as is  practicable.  Based on
7,906,617  shares of Common Stock  outstanding  on the Consent  Record Date, the
initial amount to be distributed to shareholders is expected to be approximately
$2.13 per share.  Because of the duration of the Escrow  Agreement,  the Company
will not dissolve formally until all escrowed funds have either been released to
the Company or paid to HydroChem.  As a result,  the Company expects to maintain
its corporate  existence  for at least three years  following the Closing of the
transaction.  As escrowed funds, if any, are released to the Company,  they will
be utilized to pay any unpaid expenses,  with the remainder to be distributed to
the  common  stockholders.  After all  escrowed  funds  have been  released  and
distributed,  the Company will dissolve and cease its corporate  existence.  See
"PLAN OF LIQUIDATION AND DISSOLUTION."


                                 SPECIAL FACTORS

Principal Reasons for the Sale

         The Board of Directors of the Company has unanimously approved the sale
of  substantially  all of the assets of the Company and unanimously  recommended
the proposed sale transaction  with HydroChem to the Company's  stockholders for
their approval as required under the Exchange Act.

         The Board's conclusion to approve the Sale was based on the collective,
subjective  judgments of its  individual  members.  The Board of  Directors  has
considered  the terms and  conditions of the Agreement and the Escrow  Agreement
and has determined that the Agreement and the Escrow  Agreement are fair to, and
in the  best  interest  of,  the  Company  and  its  stockholders.  The  Board's
determination   of  fairness  is  a  subjective   and  not  solely  an  economic
determination.  In making their respective determinations,  which determinations
were the product of the business  judgment of the  respective  members  thereof,
exercised in light of their fiduciary duties to the Company and the stockholders
of the Company,  the Board of Directors reviewed and considered  information and
documentation  relating to the Agreement and the Escrow Agreement and considered
the following additional factors,  each of which influenced the Board to approve
the Sale: (i) the recent delisting of the Company's Common Stock from The Nasdaq
National Market and its subsequent  listing on The Nasdaq SmallCap Market,  (ii)
the recent  trading price of the Company's  Common Stock on The Nasdaq  SmallCap
Market,  (iii) the Board's  belief that the Sale  maximizes  the per share price
obtainable  by the Company's  common  stockholders,  given the Company's  recent
financial  performance  and the  Board's  expectations  that,  given  reasonably
expected revenue growth, it would take the Company  approximately  five years to
reach price to earnings ratio levels comparable to those expected to be obtained
in the Sale,  and (iv) that the purchase  price to be received by the Company in
the Sale exceeds the purchase  price  discussed  with another  interested  third
party.  The Board of  Directors  did not find it  practicable  to,  and did not,
quantify or otherwise attempt to assign relative weights to the specific factors
considered in making their determination.  No additional factors were considered
by the Board, nor did the Company retain the services of a financial  advisor or
any third party to evaluate the terms of the proposed transaction, and no formal
analysis with respect to the value of the assets to be sold was performed.
<PAGE>


History of the Sale

         In November  1997,  Joe Young, a Director of the Company and an officer
of Rollins Investment Fund, the Company's largest common stockholder, received a
telephone  call  from Mr.  Pelham  H. A.  Smith,  Vice  President  of  Corporate
Development for HydroChem.  Mr. Smith asked Mr. Young whether or not the Company
might have an interest in being acquired by HydroChem.  Mr. Young told Mr. Smith
that the Company had no interest  in such a  transaction  at that time.  Between
January 1998 and March 17, 1998,  Mr.  Smith called Mr. Young  several  times to
determine  whether or not the  Company's  position had  changed.  In view of the
Company's  Common Stock  trading price during the first three months of 1998 and
the Company's  being delisted from The Nasdaq National Market and its subsequent
listing on The Nasdaq  SmallCap  Market,  Mr. Young and Rollins  Investment Fund
determined that a transaction such as that proposed by HydroChem could be in the
best interests of the Company and its  stockholders.  As a result,  on March 17,
1998, Mr. Young informed Mr. Smith of the Company's potential interest in such a
transaction and forwarded certain limited  information  regarding the Company to
HydroChem.  Between  March 18, 1998 and April 29, 1998,  Mr. Young and Mr. Smith
had several additional discussions and Mr. Young provided additional information
regarding the Company to Mr. Smith.  On April 29, 1998, Mr. Young sent a memo to
Mr. Smith informing him that due to  unavailability of the principals of Rollins
Investment  Fund, he would be unable to have further  discussions with Mr. Smith
regarding  the  proposed  transaction  prior to May 18,  1998.  On May 27, 1998,
Rollins  Investment Fund authorized Mr. Young to proceed with  negotiations with
HydroChem.   On  June  10,  1998,  both  parties  entered  into  confidentiality
agreements with respect to information disclosed in performing due diligence. On
each of July 13 and 29, 1998, Mr. Young forwarded additional limited Company due
diligence  materials to Mr. Smith. On August 13, 1998, Mr. Young,  Mr. Smith, Ed
Strickland,  President and Chief  Executive  Officer of the Company,  and B. Tom
Carter,  Jr., Chairman and Chief Executive Officer of HydroChem,  met in Atlanta
to discuss the Sale. On August 25, 1998,  Mr. Young,  Mr. Smith,  Mr. Carter and
their  respective  attorneys  met in Atlanta to negotiate  the Sale.  During the
approximately two-week period following August 25, several conference calls were
held among the above referenced parties to finalize the Sale negotiations.

         The purchase  price was  negotiated  extensively  throughout the entire
negotiating  process,  and the Board believes that the price obtained is fair to
the Company's stockholders. Initially, HydroChem offered to purchase the Company
for a purchase price of approximately $23.7 million. This offer was not accepted
by the Company.  HydroChem was then allowed to begin its due diligence review in
order to determine  whether it could justify  increasing its offer. As a result,
HydroChem  increased its proposed purchase price to approximately  $25.7 million
and then to approximately  $27.6 million.  Neither of these offers were accepted
by the  Company.  Finally,  after due  diligence  review,  HydroChem  offered to
purchase the Company for approximately $29.8 million.

           On  September 8, 1998,  the Board of  Directors  of the  Company,  by
unanimous consent, approved the Sale, and the original form of the Agreement. On
December  11,  1998,  the Board of  Directors  of the Company  approved  certain
amendments  to the original  form of the  Agreement  adding the  Subsidiary as a
party to the Agreement and pertaining to the liquidation of the Company, certain
employee benefit plan issues, a change in the date of the Closing, the exclusion

<PAGE>

from the assets acquired of prepaid  expenses of the Company,  the assumption of
all liabilities  and obligations of the Company  incurred in the ordinary course
of  business on or after  January 1, 1999  through the Closing and the change in
the date by which the  Agreement  would  terminate  if the  Closing had not been
consummated, among other things.

         The Company did not consider  mergers,  acquisitions  or joint ventures
with  other  third  parties  in  the  industrial  cleaning  industry  due to the
Company's belief that it could not obtain terms more favorable than those of the
Sale, coupled with the Board's concern that if it became publicly known that the
Company was for sale, the Company's  competitors might successfully hire a large
number of the Company's key employees.

Interests of Certain Persons in the Sale

         Stockholders of the Company should be aware that certain members of the
management of the Company and its Board of Directors  have certain  interests in
the Sale in addition to the interests of stockholders  generally.  Joe M. Young,
presently a director of the Company,  is General  Manager of Rollins  Investment
Fund, the Company's largest common  stockholder,  and was appointed to the Board
of Directors of the Company pursuant to a right guaranteed to Rollins Investment
Fund in connection  with its purchase of Common Stock of the Company in December
1991.  Approximately  $8.3  million  dollars of debt of the Company is currently
guaranteed by Rollins  Investment Fund. At the Closing,  HydroChem will repay or
assume this $8.3 million and Rollins  Investment  Fund will be released from its
guaranty.  Ed Strickland,  President and Chief Executive  Officer of the Company
since October 1993, is an officer of LOR, Inc.,  which is owned by affiliates of
Rollins Investment Fund.

         Rollins Holding Company,  Inc., an affiliate of Rollins Investment Fund
and Mr. Young, are the holders of all of the outstanding shares of the Company's
Series C Preferred  Stock.  Following the Closing,  the Series C Preferred Stock
held by Rollins Holding  Company,  Inc. will receive a liquidating  distribution
from the Company of  approximately  $5.5 million dollars,  plus unpaid,  accrued
dividends,  estimated  to be  approximately  $5,500,  assuming a Closing Date of
January 5, 1999.

         Also, executive officers and directors of the Company listed below have
options to purchase an aggregate of 175,000 shares of the Company's Common Stock
which are  expected to be redeemed at a price of $2.50 per option share less the
exercise price thereof ($1.50 per share in each instance) in connection with the
consummation of the transactions  contemplated by the Agreement,  as follows: Ed
Strickland,  President and Chief Executive  Officer,  100,000 shares,  Dennis D.
Sheets, Vice President and Chief Financial Officer, 25,000 shares, Joe M. Young,
Director,  30,000 shares, Allen O. Kinzer, Director, 20,000 shares. In addition,
it is  anticipated  that Messrs.  Strickland  and Sheets will receive  retention
bonuses  following  the  Closing  in  the  following   respective  amounts:  Mr.
Strickland, $50,000 and Mr. Sheets, $12,500.

         Finally,  all  executive  officers  of the  Company  have been  offered
employment with HydroChem, except Mr. Ed Strickland.

<PAGE>

Stockholder Approval

         The Company is a Delaware  corporation.  The Company  believes that the
Sale constitutes a sale of substantially  all of the assets of the Company under
Delaware law and therefore requires stockholder approval by the affirmative vote
of a majority of the votes cast by the Company's Common  stockholders and Series
C Preferred stockholders,  voting together as a group, with each share of Common
Stock and Series C Preferred  Stock  having one vote.  As of the Consent  Record
Date, Rollins Investment Fund owned  approximately 76% of the outstanding Common
Stock  of the  Company  and  Rollins  Holding  Company,  Inc.  owned  all of the
Company's  outstanding  Series C Preferred  Stock. On December 11, 1998, each of
Rollins  Investment  Fund and Rollins  Holding  Company,  Inc.  signed a written
consent  voting  their  shares  to  approve  the  Sale in  accordance  with  the
Agreement.  These votes,  by themselves,  are sufficient to achieve  stockholder
approval of the Sale.  Since  stockholder  approval has been obtained by written
consent rather than at a meeting of the  stockholders of the Company,  under the
rules of the Exchange Act, such approval will not be effective until 20 calendar
days from the date of this Information Statement.

No Rights of Dissenting Stockholders

         Under Delaware law, dissenting stockholders will not have any rights of
appraisal upon the approval or consummation of the transaction.

Accounting Treatment

         In accordance with generally accepted accounting  principles,  any gain
or loss on the sale will be recognized as of the date the Sale is closed.

Regulatory Requirements

         Under  the  Hart-Scott-Rodino-Antitrust  Improvements  Act of 1976,  as
amended ("HSR Act"), and the rules  promulgated  thereunder by the Federal Trade
Commission ("FTC"), certain transactions,  including the sale of assets, may not
be consummated  unless certain filing and waiting period  requirements have been
satisfied.  On October 6, 1998,  the  Company  and  HydroChem  filed  applicable
documents with the FTC and requested  early  termination of the waiting  period.
The  request   for  early   termination   was  granted  on  October  19,   1998.
Notwithstanding  such termination,  at any time before or after the Closing, the
FTC, the  Department  of Justice or others could take action under the antitrust
laws with respect to the Sale,  including  seeking to enjoin the consummation of
the Sale or  seeking  the  divestiture  by  HydroChem  of all or any part of the
assets acquired.

Certain Federal Income Tax Considerations

         The following describes the material federal income tax consequences of
the proposed Sale to the Company and to its stockholders. It does not attempt to
provide tax advice to any particular  stockholder.  It does not address state or
local tax consequences nor does it address tax consequences to specialized types

<PAGE>
of  stockholders  such as foreign  investors or  tax-exempt  stockholders.  Each
stockholder is urged to discuss the tax consequences of the proposed transaction
with his or her own tax advisor.

         Tax  consequences at the corporate  level. On the sale of the assets of
the Company,  the  consolidated  group of corporations of which Valley is common
parent (the  "Group")  generally  will  recognize  gain for  federal  income tax
purposes to the extent that the amount  realized on such sale of assets  exceeds
the Group's basis in any assets being sold. Net operating loss  carryforwards of
the Group will be used to offset a portion of such gain.

         Tax consequences at the stockholder  level.  Under current tax law, the
Sale will not have any federal income tax  consequences  to the  stockholders of
the Company;  however, the subsequent  liquidation of the Company under the Plan
will have such consequences.  See "Plan of Liquidation and Dissolution - Federal
Income Tax Consequences of any Liquidating Distributions to Stockholders."

Delisting from The Nasdaq SmallCap Market

         Following the Closing, the Company anticipates that it will be delisted
from The Nasdaq  SmallCap  Market.  Following such  delisting,  there will be no
trading market for the Company's Common Stock. As a result,  stockholders may be
unable to buy or sell shares of the  Company's  Common Stock and may be required
to maintain their investment in the Company until it has been dissolved.

Reporting obligations under the Securities Exchange Act of 1934, as amended

         Following the Closing,  the Company will continue to remain  subject to
the reporting  requirements of the Exchange Act. Although the Company intends to
request  reporting  relief from the SEC with respect to certain of its reporting
obligations,  there is no guarantee that such reporting  relief will be granted.
If such  relief is not  granted,  and if the  Company is required to continue to
make all required filings under the Exchange Act following the Closing, then the
expenses of such reporting  compliance will reduce the funds otherwise available
for distribution to the Company's stockholders following the Closing.


                          THE ASSET PURCHASE AGREEMENT

         The  following  is a brief  summary of the material  provisions  of the
Agreement.  Such  summary is  qualified  in its  entirety  by  reference  to the
Agreement, a copy of which is attached to this Information Statement as Appendix
A.

Assets to be Sold and Liabilities to be Assumed

         The  assets to be sold by the  Company  to  HydroChem  pursuant  to the
Agreement  ("Assets")  constitute  substantially all of the assets of Valley and
Subsidiary of every kind, nature and description (wherever located), as the same
shall  exist on the  Closing  date  ("Closing  Date"),  except  as  specifically
<PAGE>

excluded.  The assets to be acquired  under the Agreement  include the following
except  as  specifically  excluded:  (i) all real  property,  interests  in real
property   (including,   without   limitation,   leases),   and  structures  and
improvements  located on real  property,  and all the  easements  and uses which
benefit any such real property;  (ii) all notes and accounts  receivable;  (iii)
all  machinery,   inventories,   inventories  of  parts,  computers,  furniture,
furnishings,  fixtures,  office  supplies and  equipment,  automobiles,  trucks,
vehicles,  returnable containers, tools and parts, and work in process; (iv) all
technology,   know-how,  designs,  devices,  processes,   methods,   inventions,
drawings,  schematics,  specifications,   standards,  trade  secrets  and  other
proprietary  information,  and all patents  and  applications  therefor  and all
trademarks  and trade names,  trademark  and trade name  registrations,  service
marks and service mark  registrations,  copyrights and copyright  registrations,
the applications  therefor and the licenses thereto,  together with the goodwill
and  the  business   appurtenant   thereto;   (v)  all   drawings,   blueprints,
specifications, designs and data of the Company (including drawings, blueprints,
specifications,  designs and data of the Company used by or in the possession of
any third party); (vi) all catalogues, brochures, sales literature,  promotional
material and other selling material of the Company;  (vii) all books and records
and all files, documents, papers, agreements, books of account and other records
pertaining  to the assets or to the business of the Company which are located at
the offices,  plants,  warehouses or other locations used in connection with the
assets;  (viii)  all  rights,  title  and  interest  of the  Company  under  all
contracts, agreements, licenses, leases, sales orders, purchase orders and other
commitments HydroChem will assume pursuant to the Agreement; (ix) all laboratory
equipment  (including  laboratory notes and supplies) and chemical  inventories;
(x) all  lists of past,  present  and  qualified  prospective  customers  of the
business of the  Company;  (xi) all  goodwill  relating  to the  business of the
Company as a going  concern,  together  with the right to  represent  oneself to
third  parties as the new owner of such  business;  (xii) all  governmental  and
product  licenses and permits,  approvals,  license and permit  applications and
license  and permit  amendment  applications;  (xiii) all claims  against  third
parties,  whether or not asserted and whether now existing or hereafter arising,
related  to the  business  of the  Company  or the  assets  (including,  without
limitation,  all claims based on any  indemnities  or warranties in favor of the
Company  relating to any of the  assets);  (xiv) all other  assets and rights of
every kind and nature, real or personal, tangible or intangible, of the Company;
(xv) all cash on hand,  including  bank accounts  (other than the purchase price
depository account) and temporary cash investments; (xvi) all claims for refunds
of taxes and other  governmental  charges for periods  ending on or prior to the
Closing Date;  and (xvii) all safe deposit boxes and  lockboxes,  as well as the
contents thereof.

         The specifically  excluded assets include: (i) claims or rights against
third parties  relating to liabilities or obligations  not expressly  assumed by
HydroChem;  (ii)  rights  under  insurance  policies,  including  rights  to any
cancellation  value on the Closing Date;  (iii) the Company stock books,  minute
books and other  corporate  and  financial  books and  records  (but the Company
shall,  upon request by HydroChem and, after  Closing,  at HydroChem's  expense,
provide  copies of such  financial  books and  records to  HydroChem);  (iv) all
shares of  capital  stock of the  Subsidiary;  (v) funds  held in respect of the
Company's 401(k) plan; and (vi) any pre-paid expenses of the Company incurred in
connection with the  negotiation,  preparation,  execution or performance of the
Agreement or the transactions contemplated by the Agreement.

         Substantially  all  liabilities  of the  Company  will  be  assumed  by
HydroChem  ("Assumed  Liabilities").  The  Assumed  Liabilities  are:  (i) those
liabilities  or obligations of the Company which are listed on the balance sheet

<PAGE>
included in the Company's financial  statements dated June 30, 1998 and included
in its Form 10-K for the fiscal year ended June 30, 1998,  such balance sheet to
be updated to the Closing Date;  (ii) those  liabilities  and obligations of the
Company which arise under the terms of a contract,  agreement,  license,  lease,
sales  order,  purchase  order  or  other  commitments  which  are  listed  on a
disclosure  schedule to the  Agreement  or are not  required by the terms of the
Agreement to be so listed;  and (iii) all  liabilities  and  obligations  of the
Company  incurred in the ordinary course of business on or after January 1, 1999
through the Closing Date.

         The Assumed  Liabilities  do not include any liability or obligation of
the Company:  (i) under any employee  benefit plan of the Company other than any
accrued liabilities specifically assumed by HydroChem pursuant to the Agreement;
(ii) with respect to any sales, use or excise taxes,  income taxes,  taxes based
on or measured by income or franchise  taxes  attributable  to periods or events
prior to or ending on the Closing Date or any sales, use or excise taxes, income
taxes, or any other taxes, legal, accounting, brokerage, finder's fees, or other
expenses of whatsoever  kind or nature incurred by the Company or any affiliate,
stockholder,  director,  employee  or officer of the  Company as a result of the
consummation of the transactions  contemplated by the Agreement (other than such
taxes,  fees and expenses  which are accrued in the ordinary  course of business
prior  to  Closing);  (iii)  arising  out  of any  action,  condition,  suit  or
proceeding  based upon an event  occurring  or a claim  arising (a) prior to the
Closing  Date or (b) after the Closing  Date in the case of claims in respect of
products sold or services  provided by the Company prior to the Closing Date and
attributable  to acts  performed or omitted by the Company  prior to the Closing
Date;  provided,  however,  that  HydroChem  shall assume any such  liability or
obligation to the extent it has been reserved  against on the Company's June 30,
1998  balance  sheet,  updated  to  Closing;  (iv)  pursuant  to  existing  loan
agreements (other than payment  obligations  assumed pursuant to the Agreement),
and all  agreements  executed  in  connection  therewith;  (v) to any present or
former  stockholder,  officer,  director or employee of the Company  (including,
without limitation, for bonuses, fringe benefits, vacation or holiday pay, wages
or severance pay, but excluding any accrued liabilities  specifically assumed by
HydroChem  pursuant to the  Agreement);  or (vi) incurred in connection with the
negotiation,  preparation,  execution or  performance  of this  Agreement or the
transactions contemplated by the Agreement.

         The  Closing  of the Sale  shall  occur (i) at the office of Haynes and
Boone,  LLP, 901 Main Street,  Suite 3100,  Dallas,  Texas 75202, at 10:00 a.m.,
local time,  on January 5, 1999, or (ii) at such other time and place or on such
other date as the Company and  HydroChem may mutually  agree.  Regardless of the
actual Closing Date for accounting purposes, the Closing shall be deemed to have
occurred as of 12:01 a.m. January 1, 1999.

Purchase Price Adjustment

         In the event that the net assets  reflected  on the  Company's  balance
sheet at Closing  are greater or less than  $5,353,593  (which was the amount of
net  assets at June 30,  1998),  any excess or  deficiency  shall be paid to the
Company (in the case of an excess) or to HydroChem (in the case of a deficiency)
as an adjustment to the purchase price.  This purchase price  adjustment will be
made upon  agreement  between  the  Company and  HydroChem  with  respect to the
Company's  balance sheet as of Closing.  The  Agreement  provides that within 45
<PAGE>

days  following the Closing,  the Company shall prepare and deliver to HydroChem
the  Closing  balance  sheet  from the  books  and  records  of the  Company  in
accordance with generally accepted  accounting  principles on a basis consistent
with that used in the preparation of the balance sheet included in the financial
statements of the Company dated June 30, 1998.  HydroChem,  with the  reasonable
assistance  and  cooperation  of the  Company,  shall have 30 days to review the
Closing  balance  sheet,  and on or before the expiration of such 30-day period,
HydroChem  shall  deliver  to the  Company  a  written  statement  accepting  or
objecting to the Closing balance sheet.  In the event that HydroChem  objects to
the Closing balance sheet,  such statement shall include a detailed  itemization
of  HydroChem's  objections  and its reasons  therefor,  and if no  statement is
delivered by HydroChem to the Company within such 30-day period, HydroChem shall
be deemed to have accepted the Closing balance sheet.

         After all of  HydroChem's  objections,  if any, to the Closing  balance
sheet shall have been resolved,  the amount of any excess or deficiency shall be
paid to the  Company (in the case of an excess) or  HydroChem  (in the case of a
deficiency) by the other by wire transfer of immediately available United States
funds within three  business  days of such  resolution,  receipt of  HydroChem's
written  acceptance of the Closing  balance  sheet or expiration of  HydroChem's
30-day period for objection to the Closing balance sheet.

         In addition to the net asset  adjustment set forth above,  in the event
that the Closing  balance  sheet  reflects  assets  which are not  purchased  by
HydroChem  or  reflects  liabilities  which are not  assumed by  HydroChem,  the
excess,  if any, of the  aggregate  amount of any such assets over the aggregate
amount of any such  liabilities  shall be paid to HydroChem  or, as the case may
be, the aggregate  amount of any such  liabilities  over the aggregate amount of
any such assets shall be paid to the Company, in either case by wire transfer of
immediately  available  United States funds within three business days following
the resolution of HydroChem's  objections to the Closing balance sheet set forth
above, receipt of HydroChem's written acceptance of the Closing balance sheet or
expiration of HydroChem's  30-day period for  objections to the Closing  balance
sheet.

<PAGE>
Representations and Warranties of the Company

         The Agreement  contains certain  representations  and warranties of the
Company,  including  without  limitation,  representations  and warranties  with
respect to (i) the  Company's  due  organization,  qualification,  and corporate
authority for the sale of the Assets;  (ii) possession of all required  material
licenses,  permits  and other  authorizations  required  by  applicable  laws or
governmental regulations in connection with its business as now conducted; (iii)
compliance with both the Company's  certificate of incorporation  and bylaws and
applicable laws; (iv) the Company's good and marketable title to the Assets; (v)
compliance  with all real  property  leases of the Company;  (vi) the  Company's
possession  of rights with respect to  registered  trademarks,  copyrights,  and
patents,  and the absence of  undisclosed  claims or  infringement  with respect
thereto; (vii) the absence of undisclosed  liabilities;  (viii) the identity and
enforceability  of and  the  Company's  compliance  with  all  contracts  of the
Company;   (ix)  the  accuracy  and  completeness  of  the  Company's  financial
statements  for all periods  required to be provided by the  Agreement;  (x) due
payment of all taxes; (xi) the absence of undisclosed  litigation  involving the
Company;  (xii) that the Company is in compliance in all material  respects with
all applicable laws respecting employment and employment  practices;  (xiii) the
Company's insurance  policies;  (xiv) the absence of undisclosed adverse changes
in the  business  relationships  of the  Company  with any of its  customers  or
suppliers;  (xv) that all trade accounts  receivable of the Company reflected on
its June 30, 1998 balance sheet and all trade accounts receivable of the Company
arising  between  June 30, 1998 and the Closing Date have arisen in the ordinary
course of business and represent bona fide, undisputed indebtedness;  (xvi) that
the  inventories  and  supplies  of the Company  reflected  on the June 30, 1998
balance sheet of the Company,  or acquired by the Company between June 30, 1998,
and the date of the Agreement, are carried at not in excess of the lower of cost
or fair market value,  and do not include any  inventory  which is not usable or
saleable  in the  ordinary  course  of  business  of the  Company  as  presently
conducted net of reserves;  (xvii)  compliance  with laws  regulating  hazardous
materials and other  environmental  laws;  (xviii) the Company's  conduct of the
business in the ordinary  course  consistent  with past practices since June 30,
1998;  (xix) the  absence  of  undisclosed  obligations  to pay  finder's  fees,
brokerage or agent's  commissions or other like payments in connection  with the
consummation of the transactions  contemplated  thereby; and (xx) the absence of
any material  misstatements  or omissions by either the Company in the Agreement
or any document  furnished to HydroChem in connection  with the execution of the
Agreement.

Representations, Warranties and Covenants of HydroChem

         The Agreement also contains certain  representations  and warranties by
HydroChem  including,  without  limitation,  representations and warranties with
respect to (i) its due organization and corporate  authority for the acquisition
of the Assets; (ii) possession of all required consents on the part of HydroChem
and approvals of governmental authorities; and (iii) compliance with HydroChem's
articles of incorporation and bylaws and applicable laws.

<PAGE>
         Additionally,  pursuant to the Agreement,  HydroChem covenants to offer
employment to all of the Company's  employees as of the Closing Date, other than
as otherwise reasonably determined by HydroChem.

Covenants of the Company

         The Agreement contains customary  covenants by the Company,  including,
without limitation,  the following:  (i) the Company will conduct its operations
according  to its ordinary  and usual  course of business  consistent  with past
practice;  (ii) the Company  will use its  reasonable  best  efforts to preserve
intact its business organization and goodwill, to keep available the services of
its officers and  directors,  and to maintain  satisfactory  relationships  with
suppliers,  distributors,  licensors, licensees, customers, employees and others
having  business  relationships  with it; (iii)  afford to HydroChem  and to its
officers, employees,  accountants,  counsel and other authorized representatives
reasonable  access,  throughout  the period  prior to the earlier of the Closing
Date or the date of  termination  of the  Agreement,  to the  Company's  plants,
properties,  equipment, personnel, books and records (including, but not limited
to, audit and tax work papers and surveys, reports, studies, evaluations and the
like  pertaining  to the  environment  at the  Company's  facilities  or  former
facilities  (during  the time of  ownership  or  operation  by the Company or to
activities of the Company);  (iv) use its  reasonable  best efforts to cause its
representatives  to furnish to HydroChem and to its  authorized  representatives
such  additional  financial and operating  data and other  information as to its
respective  businesses  and  properties  as  HydroChem  or its  duly  authorized
representatives  may from  time to time  reasonably  request;  (v)  provide  all
authorizations  reasonably  necessary  for  HydroChem  to review  records of any
governmental   body  with   jurisdiction;   (vi)   afford   HydroChem   and  its
representatives reasonable access, throughout the period prior to the earlier of
the Closing Date or the date of termination of the Agreement, to its present and
potential customers, and HydroChem and its authorized representatives shall have
the right to contact such customers and conduct such due diligence investigation
relating to customer  relations  as  HydroChem  deems  reasonably  necessary  or
appropriate;   (vii)  the  Company  shall  unconditionally  guarantee  that  all
indebtedness  represented  by the accounts  receivable  of the Company as of the
Closing Date (less the reserve for doubtful  accounts not to exceed an aggregate
of $125,000) will be received by HydroChem; (viii) the Company shall discontinue
all use of the name "Valley Systems,  Inc." and any and all derivations  thereof
within 30 days after the Closing  Date (other than in respect of the name of the
Company's  401(k) plan prior to its  termination);  (ix) the  Company  shall not
dissolve  until the entire Escrow Fund has been released  pursuant to the Escrow
Agreement;  (x) the  Company  shall  deliver to  HydroChem  unaudited  financial
statements  (including a consolidated balance sheet,  consolidated  statement of
operations,  consolidated statement of cash flows, and consolidated statement of
stockholders'  equity) and other operating reports for each month beginning with
July 1998 and ending with the month preceding the month during which the Closing
occurs; (xi) on or after the date of the Agreement, and until the earlier of the
Closing Date or the date of termination of the Agreement,  the Company shall not
furnish any written communication (other than this Information Statement) to its
stockholders,  customers,  creditors  or to the public  generally if the subject
matter thereof relates to the transactions contemplated by the Agreement without
the prior approval of HydroChem; provided, however, that the foregoing shall not
be deemed to prohibit any  disclosure  required by any  applicable law or by any
governmental body having jurisdiction over such matters; (xii) the Company shall
give prompt notice to HydroChem,  and HydroChem  shall give prompt notice to the
Company, of (a) the occurrence, or failure to occur, of any event the occurrence
<PAGE>

or failure of which would be likely to cause any  representation  or warranty of
such party contained in the Agreement to be untrue or inaccurate in any material
respect at any time from the date of the Agreement to the Closing Date,  and (b)
any material failure of the Company, or of HydroChem,  as the case may be, or of
any officer, director,  employee or agent thereof, to comply with or satisfy any
covenant,  condition or  agreement to be complied  with or satisfied by it under
the Agreement; and (xiii) the Company agrees to use its best efforts to take, or
cause to be  taken,  all  actions,  and to do, or cause to be done,  all  things
reasonably  necessary,  proper or advisable to consummate and make effective the
transactions  contemplated  by  the  Agreement,  including  without  limitation,
obtaining all authorizations, consents, waivers and approvals as may be required
in connection  with the  assignment of those  contracts,  agreements,  licenses,
leases,  sales orders,  purchase  orders and other  commitments to be assumed by
HydroChem; provided that the Company shall not be obligated to make any payments
in order to obtain any such authorizations, consents, waivers or approvals.

Negative Covenants of the Company

         The Company has agreed that,  prior to the Closing,  except as provided
in the  Agreement  or pursuant to the prior  consent of  HydroChem,  neither the
Company nor any subsidiary thereof, will do any of the following: (i) other than
dividends  that would be paid to the holders of the Series C Preferred  Stock in
the ordinary course, declare or pay any cash dividends on its outstanding shares
of capital  stock;  (ii) merge  with,  consolidate  with,  sell its assets to or
acquire  substantially all the assets or capital stock of, any other corporation
or person,  or enter into any other  transaction  not in the  ordinary and usual
course of its  business;  (iii) incur any  indebtedness  for  borrowed  money or
guarantee  any  such  indebtedness  or issue  or sell  any  debt  securities  or
guarantee any debt securities of others,  except that it may incur  indebtedness
in the ordinary course of business consistent with prior practice; (iv) make any
direct or  indirect  redemption,  purchase  or other  acquisition  of any of its
capital stock;  (v) create or amend any pension or profit  sharing plan,  bonus,
deferred  compensation,  death benefit, or retirement plan, or any other benefit
plan or program;  (vi) amend its certificate of incorporation or bylaws,  except
as may be  necessary  to carry out the  Agreement  or as required by law;  (vii)
issue any share of its capital stock, effect any stock split or otherwise change
its  capitalization  as it exists on the date of the  Agreement;  (viii)  grant,
confer or award any options,  warrants,  conversion rights or other rights,  not
existing  on the date of the  Agreement,  to acquire  any shares of its  capital
stock;  (ix) enter into any  agreement  or make any  undertaking  which could be
violated,  or create  obligations  which  could be  accelerated,  as a result of
changes or  developments  or the  absence of  changes  or  developments  in, the
business, assets, earnings, operations or condition,  financial or otherwise, of
any other party to the Agreement or any of its  subsidiaries  or affiliates;  or
(x) make any material changes in any of their respective  management  employment
arrangements.

Indemnification

         Pursuant to the Agreement, the Company has agreed to indemnify, defend,
protect,  save and hold harmless HydroChem against, and will reimburse HydroChem
for, any and all losses made or incurred by or asserted  against  HydroChem,  at
any time after the Closing Date, directly or indirectly, arising out of, related
to,  caused  by,  or  resulting  from  any of the  following:  (i)  any  and all
liabilities  or  obligations  of the  Company  or claims  against  or imposed on
HydroChem, of any nature, including,  without limitation,  those relating to the
<PAGE>

respective  business  activities of the Company or to conditions existing on any
of the  facilities  prior  to the  Closing  Date  not  specifically  assumed  by
HydroChem; (ii) any inaccuracy, omission, misrepresentation,  breach of warranty
or  representation,  or  nonfulfillment  of any  term,  provision,  covenant  or
agreement  on the  part  of the  Company  contained  in  the  Agreement,  or any
inaccuracy or  misrepresentation  in, or omission from, any certificate or other
instrument  furnished or to be furnished by the Company to HydroChem pursuant to
the  Agreement;  (iii) the  Company's  failure to comply with any bulk  transfer
provisions which may be in effect in the state or states in which the assets are
located;  (iv)  any  breach  by  the  Company  of  the  Company's  environmental
representation  and  warranty  contained in the  Agreement;  and (v) any and all
items  listed  on the  schedules  delivered  subsequent  to the  Closing  timely
objected to by HydroChem and determined not to be items assumed by HydroChem.

         The  Company  will  not be  obligated  to  indemnify  or hold  harmless
HydroChem  from or against  losses  arising  out of or  resulting  from  matters
described  above,  until  the  amount  of  such  losses  individually  or in the
aggregate exceed the amount of $200,000 (the "Floor Amount"), which Floor Amount
shall be deemed to have been  reached by the  Company  when  HydroChem's  losses
exceed the amount of $200,000. Upon reaching the Floor Amount, the Company shall
be required to indemnify  HydroChem  for losses  comprising  the Floor Amount as
well as all losses occurring thereafter only from the escrow fund and only up to
(except in the cases of losses  resulting from fraud) an aggregate  amount equal
to the  amount of the  escrow  fund then  outstanding  (the  "Company's  Ceiling
Amount"). The Company will be obligated to indemnify and hold harmless HydroChem
from or against losses directly or indirectly arising out of, related to, caused
by, or resulting from any inaccuracy,  omission or  misrepresentation  contained
in,  or  breach  of  warranty  or  representation   respecting,   the  Company's
representations in the Agreement with respect to trade accounts receivable up to
the  Company's  Ceiling  Amount  without  regard to the Floor  Amount and,  with
respect  to certain  of the  Company's  representations  in the  Agreement  with
respect to  contracts  and leases,  without  regard to the  materiality  of such
inaccuracy,   omission,   misrepresentation,    or   breach   of   warranty   or
representation.  There shall be no monetary limit on the Company's obligation to
indemnify and hold harmless  HydroChem  from or against  losses  resulting  from
fraud.

         HydroChem agrees to indemnify,  defend, protect, save and hold harmless
the Company  against,  and will reimburse the Company on demand for, any and all
losses made or incurred by or asserted  against the  Company,  at any time after
the Closing Date, directly or indirectly, arising out of, related to, caused by,
or resulting from (i) any  inaccuracy,  omission,  misrepresentation,  breach of
warranty, or nonfulfillment of any term, provision, covenant or agreement on the
party  of  HydroChem  contained  in  the  Agreement;  (ii)  any  inaccuracy,  or
misrepresentation  in, or omission  from, any  certificate  or other  instrument
furnished  or to be  furnished  by  HydroChem  to the  Company  pursuant  to the
Agreement;  or (iii)  operation of business  activities  of HydroChem  after the
Closing  Date  involving  the  Assets.   Within  45  days  following  the  first
anniversary  of the  Closing  Date,  HydroChem  shall  deliver to the  Company a
certificate of HydroChem  certifying which of those  liabilities and obligations
of HydroChem  assumed from the Company  pursuant to the Agreement had become due
<PAGE>

and  payable  but  had  not  been  paid in  full  or  resolved  as of the  first
anniversary of the Closing Date. With respect to the liabilities and obligations
listed  in such  certificate  (or  which  were  erroneously  omitted  from  such
certificate),  HydroChem's obligations pursuant to the Agreement shall terminate
upon the payment or resolution of such liability or obligation.  With respect to
those liabilities and obligations of HydroChem assumed from the Company pursuant
to the  Agreement  which by their  respective  terms in effect at  Closing  will
become due and payable  later than the first  anniversary  of the Closing  Date,
HydroChem's  obligations  pursuant to the  Agreement  shall  terminate  upon the
payment or resolution of such liability or obligation. With respect to all other
liabilities  and obligations of HydroChem  assumed from the Company  pursuant to
the Agreement, HydroChem's obligations pursuant to the Agreement shall terminate
upon the third  anniversary  of the Closing Date.  In the event the  certificate
referenced above is not timely delivered,  HydroChem's  obligations  pursuant to
the Agreement  shall terminate upon the payment or resolution of all liabilities
assumed pursuant to the Agreement.

         HydroChem  will not be  obligated  to  indemnify  or hold  harmless the
Company  from  or  against  losses  arising  out of or  resulting  from  matters
described  above  (other than  losses  directly  or  indirectly  arising out of,
related to, caused by, or resulting from any  nonfulfillment  of any covenant on
the part of HydroChem  contained in the Agreement with respect to the assumption
of Company liabilities or any certificate related thereto),  until the amount of
such losses  individually  or in the  aggregate  exceed the Floor  Amount.  Upon
reaching the Floor Amount,  HydroChem shall be required to indemnify the Company
for  losses  comprising  the  Floor  Amount  as  well  as all  losses  occurring
thereafter  only up to (except in the cases of losses  resulting  from fraud) an
aggregate amount equal to $12 million ("HydroChem's Ceiling Amount").  HydroChem
will be  obligated to  indemnify  and hold  harmless the Company from or against
losses  directly  or  indirectly  arising  out of,  related  to,  caused  by, or
resulting  from any  nonfulfillment  of any  covenant  on the part of  HydroChem
contained in the Agreement with respect to the assumption of Company liabilities
up to HydroChem's  Ceiling  Amount,  without  regard to the Floor Amount.  There
shall be no monetary  limit on  HydroChem's  obligation  to  indemnify  and hold
harmless the Company from or against losses resulting from fraud.

         Notwithstanding  anything to the contrary  contained in the  Agreement,
the  parties  agree  that  HydroChem's  sole  remedy  for any claim for  damages
(excluding  equitable remedies and those resulting from fraud) arising under the
Agreement  (including the disclosure  schedules) or any other agreement  between
HydroChem and the Company  entered into in connection  therewith  (including any
claim  based  upon  the  Company's  warranties,  representations  and  covenants
contained in the  Agreement)  shall be limited to the  remedies  provided in the
indemnification  provisions of the  Agreement  and the  provisions of the Escrow
Agreement. Further, HydroChem waives all other statutory or common law rights to
recover   against  the  Company  for  any  matter   relating  to   environmental
contamination, environmental liabilities or hazardous materials.

Company's Conditions To Closing

         The  Company's  obligations  under the  Agreement  are  subject  to the
satisfaction at Closing of each of the following conditions:  (i) the holders of
shares of the issued and  outstanding  capital  stock of the Company  shall have
duly  adopted and  approved  the  Agreement  and all  transactions  contemplated
thereby in accordance  with the  requirements  of Delaware law and the Company's
Certificate  of  Incorporation  and  Bylaws,  as  amended  to the  date  of such
adoption;  (ii) all representations and warranties of HydroChem contained in the
Agreement  shall  be  true  and  correct  at and as of the  Closing  Date in all

<PAGE>

material  respects  and  HydroChem  shall  have  performed  all  agreements  and
covenants in all material  respects and satisfied all  conditions on its part to
be  performed  or  satisfied  by the Closing  Date  pursuant to the terms of the
Agreement, and the Company shall have received a certificate of HydroChem signed
by its Chief Executive Officer and dated the Closing Date, to both such effects;
(iii)  HydroChem  shall have  effected  payment of the purchase  price (less the
escrow funds) in accordance with the prior written  instructions of the Company;
(iv)  HydroChem  shall have  executed and delivered  the Escrow  Agreement;  (v)
HydroChem  shall have effected  payment of the escrow funds to the escrow agent;
(vi) the escrow  agent shall have  acknowledged  receipt of the escrow funds and
accepted the same subject to the terms and  conditions of the Escrow  Agreement;
(vii) HydroChem shall have executed and delivered a bill of sale, assignment and
assumption  agreement;  (viii)  HydroChem  shall have delivered to the Company a
certificate,   dated  the  Closing  Date,  of  HydroChem's  corporate  Secretary
certifying: (a) resolutions of its board of directors adopting and approving the
Agreement and all transactions contemplated thereby and authorizing execution of
the Agreement and the  execution,  performance  and delivery of all  agreements,
documents and transactions  contemplated  thereby; and (b) the incumbency of its
officers  executing the Agreement and all agreements and documents  contemplated
thereby;  (ix) the  Company  shall have  received  from  Haynes and Boone,  LLP,
counsel of  HydroChem,  an opinion,  dated the Closing  Date, as specified in an
exhibit to the Agreement; (x) the approval and all consents from any third party
or governmental body required to consummate the transactions contemplated by the
Agreement  shall have been  obtained  and the waiting  period and any  statutory
extension   thereof   applicable  to  the   consummation  of  the   transactions
contemplated  by the  Agreement  under the HSR Act shall  have  expired  or been
terminated;  (xi) no proceeding  shall have been instituted or threatened  which
questions  the  validity  or legality of the  transactions  contemplated  by the
Agreement or any governmental consent,  approval or authorization  necessary for
the consummation of the transactions contemplated by the Agreement;  (xii) as of
the  Closing,  there  shall  be  no  effective  injunction,   writ,  preliminary
restraining  order or any order of any  nature  issued  by a court of  competent
jurisdiction  directing that the  transactions  provided for in the Agreement or
any of them not be  consummated as so provided or imposing any conditions on the
consummation of the transactions contemplated thereby which is unduly burdensome
on the Company;  (xiii) the Company and all guarantors of any bank  indebtedness
of the  Company  shall have  received a written  release  therefrom  in form and
substance satisfactory to the Company and such guarantors.

HydroChem's Conditions To Closing

         The obligations of HydroChem are subject to the satisfaction at Closing
of each of the following conditions: (i) the holders of shares of the issued and
outstanding  capital  stock of the Company  shall have duly adopted and approved
the Agreement and all transactions  contemplated  thereby in accordance with the
requirements  of applicable  law, and the Company's  Articles or  Certificate of
Incorporation  and Bylaws, as amended to the date of such adoption and approval;
(ii)  all  representations  and  warranties  of  the  Company  contained  in the
Agreement  shall be true and correct in all  material  respects at and as of the
Closing Date and the Company shall have  performed all  agreements and covenants
in all  material  respects  and  satisfied  all  conditions  on its  part  to be
performed  or  satisfied  by the Closing  Date  pursuant to the  Agreement,  and

<PAGE>

HydroChem  shall  have  received a  certificate  of the  Company,  signed by its
President  and dated the Closing  Date,  to both such  effects;  (iii) as of the
Closing, there shall have been no material adverse changes since the date of the
most recent financial  statements in the Company, and the Company shall not have
suffered any material loss (whether or not insured) by reason of physical damage
caused by fire,  earthquake,  accident  or other  calamity  which  substantially
affects  the value of their  respective  assets,  properties  or  business,  and
HydroChem  shall  have  received a  certificate  of the  Company,  signed by its
principal financial officer and dated the Closing Date, to such effect; (iv) the
Company shall have executed and delivered a receivables  guaranty in the form of
an exhibit to the Agreement; (v) the Company shall have delivered to HydroChem a
Certificate of the Secretary of State (or other  authorized  public official) of
the Company's  jurisdiction of incorporation  certifying as of a date reasonably
close to the Closing Date that the Company has filed all required reports,  paid
all  required  fees and taxes,  and is, as of such date,  in good  standing  and
authorized  to transact  business as a domestic or foreign  corporation,  as the
case may be; (vi) the  Company  shall have  executed  and  delivered  the Escrow
Agreement;  (vii) the escrow agent shall have acknowledged receipt of the escrow
funds and accepted the same  subject to the terms and  conditions  of the Escrow
Agreement;  (viii)  HydroChem  shall have received from Arnall Golden & Gregory,
LLP, counsel for the Company, an opinion dated the Closing Date, as specified on
an  exhibit  to  the  Agreement;  (ix)  the  Company  shall  have  obtained  all
authorizations, consents, waivers and approvals as may be required in connection
with the assignment of those contracts,  agreements,  licenses,  leases,  sales,
orders,  purchase  orders and other  commitments  to be  assigned  to  HydroChem
pursuant to the  Agreement;  (x) the Company shall have executed and delivered a
bill of sale, assignment and assumption  agreement;  (xi) the Company shall have
delivered to HydroChem a  certificate,  dated the Closing Date, of the Company's
corporate  Secretary  certifying:  (a)  resolutions  of the Company's  Board and
stockholders   approving  and  adopting  the  Agreement  and  all   transactions
contemplated  thereby  and  authorizing  execution  of  the  Agreement  and  the
execution,   performance   and  delivery  of  all   agreements,   documents  and
transactions  contemplated  thereby;  and (b)  the  incumbency  of its  officers
executing the Agreement and all agreements and documents  contemplated  thereby;
(xii) the approval and all consents  from any third party or  governmental  body
required to consummate the transactions contemplated by the Agreement shall have
been  obtained  and the  waiting  period  and any  statutory  extension  thereof
applicable to the consummation of the transactions contemplated by the Agreement
under the HSR Act shall have expired or been  terminated;  (xiii) no  proceeding
shall have been  instituted  or  threatened  which  questions  the  validity  or
legality of the  transactions  contemplated by the Agreement or any governmental
consent,  approval  or  authorization  necessary  for  the  consummation  of the
transactions contemplated by the Agreement; (xiv) as of the Closing, there shall
be no effective injunction,  writ, preliminary restraining order or any order of
any  nature  issued  by a court of  competent  jurisdiction  directing  that the
transactions  provided for in the Agreement or any of them not be consummated as
so provided or imposing any conditions on the  consummation of the  transactions
contemplated  by the Agreement  which is unduly  burdensome  on HydroChem;  (xv)
HydroChem  shall have received from each of LOR, Inc.,  Rollins  Investment Fund
and Rollins Holding Company,  Inc., an executed  agreement whereby each of them,
on their own behalf and on behalf of their respective  affiliates,  agrees to be
bound by certain restrictive covenants substantially similar to those imposed on
the Company under the heading --  "Restrictive  Covenants";  provided,  however,
that no such  provision  shall  prohibit an  investment  in any  publicly-traded
entity that does not require the filing of a Schedule  13D or Schedule 13G under
the Exchange Act; and (xvi) HydroChem shall have reasonably concluded, following
its environmental due diligence  review,  that there are no "material  breaches"
(as  defined  in the  Agreement)  of the  Company's  warranties  with  regard to
environmental  matters,  provided,  however,  that  such  conclusion  shall  not
preclude  the  remedies of HydroChem  provided  for in the  Agreement  regarding
material breaches.
<PAGE>

No Sale Negotiations

         The  Agreement  provides that neither the Company nor any person acting
on its  behalf  will take any  action  (i) to  solicit,  initiate  or  encourage
submission  of  inquiries,  proposals  or offers from any third party other than
HydroChem  relating  to any  acquisition  or purchase of all or a portion of the
assets of, or any equity interest in, the Company,  or (ii) unless the Company's
Board of  Directors  has  determined  that such third party has made a "Superior
Takeover  Proposal"  (as  defined  below),  participate  in any  discussions  or
negotiations  regarding,  or furnish  to any third  party any  information  with
respect to, or otherwise cooperate in any way with, or assist or participate in,
facilitate or encourage,  any effort or attempt by any third party to do or seek
any of the  foregoing.  In the event that (a) the Closing shall fail to occur as
the result of the Company  violating the  provisions  set forth above or (b) the
Company shall have determined that a Superior  Takeover  Proposal exists,  shall
have  elected  to  accept  such  Superior   Takeover  Proposal  and  either  the
transaction  contemplated  thereby is consummated or the Company  terminates the
Agreement as a result of such election,  the Company shall  promptly,  but in no
event  later  than one day after  the  first of such  events  shall  occur,  pay
HydroChem an aggregate fee of $2,000,000,  which amount shall be payable in same
day funds, plus all reasonable out-of-pocket expenses and fees actually incurred
by HydroChem or incurred by banks or other  financial  institutions on behalf of
HydroChem.  A  "Superior  Takeover  Proposal"  means a bona  fide (a)  tender or
exchange offer; (b) proposal for a merger to which the Company would be a party;
(c) consolidation or other business  combination  involving the Company;  or (d)
any other  arrangement  to acquire,  directly or indirectly,  for  consideration
consisting of cash, securities or a combination thereof, all of the Common Stock
of the Company then outstanding or all or substantially all of the assets of the
Company on terms that the Board determines in its good faith reasonable judgment
(after   consultation  with  a  financial   advisor  of  nationally   recognized
reputation)  to be more  favorable to the  stockholders  of the Company than the
transactions contemplated by the Agreement.

Termination Provisions

         The  Agreement  provides that it may be terminated at any time prior to
Closing (i) by mutual  consent of the  parties,  (ii) by either  party if one or
more of the  conditions to such party's  obligations  to proceed to Closing have
not been fulfilled or waived by January 8, 1999,  (iii) by HydroChem at any time
prior  to the  fifteenth  business  day  after  the  delivery  of  exhibits  and
preliminary  schedules  (in a form  reasonably  satisfactory  to  HydroChem)  if
HydroChem's  general due diligence  investigation of the Company discloses facts
or circumstances which reflect in a material adverse way on the Company, (iv) by
HydroChem at any time if there has been a material adverse change in the Company
following  the date of the  Agreement,  (v) by  either  party  as a result  of a
material breach in any representations and warranties made by the other party or
the  failure  to perform  covenants  and  agreements  required  to be  performed
pursuant to the  Agreement,  (vi) by either party if there has been any statute,
rule  or  regulation   enacted  or  promulgated  or  deemed  applicable  to  the
transactions contemplated by the Agreement by any governmental body that, in the
reasonable  judgment of either party,  as the case may be, might (a) result in a
significant  delay in the ability of the parties to consummate  the  transaction
contemplated  by the Agreement;  (b) render the parties unable to consummate the
transactions  contemplated by the Agreement; (c) make such consummation illegal;
or (d) otherwise materially adversely affect the Company, and (vii) by HydroChem
if the Company shall fail to deliver one or more of the preliminary schedules to
the  Agreement  in  accordance  with  the  Agreement  or if one or  more  of the
preliminary  schedules,  as delivered,  differs  materially from the information

<PAGE>
concerning  the  Company  provided  by the  Company  to  HydroChem  prior to the
execution of the Agreement.  In the event of any termination of the Agreement as
set forth above,  there shall by no liability on the part of either HydroChem or
the Company to the other,  except for the material breach of any representation,
warranty or  covenant  contained  in the  Agreement  which is in the  reasonable
control of the party in breach.  If the  Agreement is  terminated by the Company
for any reason whatsoever other than a failure of any condition set forth in the
Agreement and HydroChem is not in material breach of its material  covenants and
agreements,  then the Company shall  reimburse  HydroChem  (including  banks and
other financial  institutions that incurred expenses on behalf of HydroChem) for
all  reasonable  out-of-pocket  expenses  and fees  actually  incurred  by it in
connection with the negotiation,  preparation,  execution and performance of the
Agreement.  Such expenses and fees are currently  estimated to be  approximately
$450,000.

Restrictive Covenants

         The Agreement  provides that the Company will not, for a period of five
years  following  the  Closing  Date,  compete,  directly  or  indirectly,   for
compensation  or not,  with  HydroChem (i) with regard to any product or service
which is the same as or similar  to that  offered  by the  Company  prior to the
Closing,  (ii) induce or attempt to induce any customer to withdraw,  curtail or
cancel its business with HydroChem, (iii) recruit or otherwise solicit or induce
any person or entity who is, on the Closing Date or  thereafter,  an employee or
vendor of the Company or any subsidiary to terminate his or her employment with,
or  otherwise  cease  his  or her  relationship  with,  HydroChem  or any of its
subsidiaries or affiliates,  (iv) hire,  recruit or otherwise solicit any person
or entity who, within the six months immediately preceding the Closing Date, had
been an employee or vendor of the Company,  or (v) permit the Company's  name to
be used by or engage in or carry on,  directly or indirectly,  either for itself
or as a member of a partnership or as a stockholder,  investor, agent, associate
or consultant of any person, partnership or corporation (other than HydroChem or
a subsidiary or affiliate of HydroChem),  any business in  competition  with the
business as carried on by the Company on the Closing Date.

                       PLAN OF LIQUIDATION AND DISSOLUTION

         The following  discussion of the  liquidation  and  dissolution  of the
Company is a summary of material  information  contained  in the Plan. A copy of
the Plan is  attached  to this  Information  Statement  as  Appendix  C, and the
Company's stockholders are urged to read the Plan carefully in its entirety. The
following summary is qualified in its entirety by reference to the complete text
of the Plan.

Overview

         The Plan is  contingent  upon the Closing of the Sale and  provides for
the  complete  liquidation  and  dissolution  of  the  Company  pursuant  to the
provisions of the Delaware General  Corporation Law (the "DGCL").  The effective
date of the  Plan  (the  "Effective  Date")  shall  be the  first  business  day
following the Closing Date.  After the Effective  Date,  the Company shall begin
<PAGE>

the  process  of  liquidating  the  Company  in  accordance  with the  terms and
conditions  of the  Plan;  provided,  however  that  the  Company  shall  not be
dissolved  until the first  business day following the third  anniversary of the
Closing Date; provided,  further,  however,  that if on the third anniversary of
the Closing Date any pending  disputes exist  affecting the  disbursement of any
amounts  held  pursuant  to the  Escrow  Agreement,  the  dissolution  shall  be
postponed  until such  disputes have been fully  resolved.  The Company will not
engage in any business  activities  after the  Effective  Date of the Plan other
than (i)  prosecuting or defending any lawsuits by or against the Company,  (ii)
enabling the Company to gradually settle and close its business,  dispose of and
convey its property,  discharge  liabilities  and wind up its business  affairs,
(iii)  complying with applicable  laws,  (iv) performing  pursuant to the Escrow
Agreement and the Agreement,  and (v) distributing its remaining assets, if any,
in accordance with the Plan.

         Substantially  all of the Company's  assets shall be sold in accordance
with the terms of the  Agreement.  After the Effective  Date,  the Company shall
cause the liquidation of its remaining  assets to cash as soon as is practicable
consistent  with the terms of the Plan,  upon such terms and  conditions  as the
Board  deems  expedient  and in  the  best  interests  of the  Company  and  its
stockholders, without any further vote or action by the Company's stockholders.

         As  determined  by  the  Board  of  Directors,   prior  to  making  any
distribution  to the holders of the Company's  Common  Stock,  the Company shall
pay, or make  reasonable  provision  to pay, all claims and  obligations  of the
Company,  including  contingent,  conditional  or unmatured  claims known to the
Company.  Further,  the  Company  shall make  reasonable  provision  to pay,  as
determined by the Board of Directors, claims that are not currently known to the
Company but that the Board of Directors  reasonably believes are likely to arise
or become  known to the Company  within 10 years after the date of  dissolution.
The Plan also provides that the Company  shall  establish a contingency  reserve
(the "Contingency  Reserve"),  which will contain  approximately $3.8 million in
cash, to account for unknown events, claims, contingencies and expenses incurred
in connection  with the Company's  liquidation  and  dissolution.  Following the
payment,   satisfaction  or  other  resolution  of  all  such  events,   claims,
contingencies  and expenses,  any amounts  remaining in the Contingency  Reserve
shall be distributed as set forth below.

Distributions

         The Plan provides  that  following the payment or provision for payment
of (i) the Company's claims and obligations,  including the establishment of the
Contingency Reserve,  (ii) the liquidation  preference on the 55,000 outstanding
shares of Series C Preferred  Stock plus any accrued,  unpaid  dividends on such
shares,  (iii) the  redemption  of the  outstanding  stock  options,  and (iv) a
retention bonus (the "Retention Bonus") to certain officers and employees of the
Company  who remain as such  through  the  Effective  Date,  the  Company  shall
distribute pro rata to its common stockholders all of its remaining property and
assets,  if any, through one  distribution or a series of  distributions  out of
funds legally  available  therefor.  The expenses of administering  the Company,
winding up the Company's affairs,  preparing all reports and filings required by
federal and state law in connection with the Company's continued existence,  the
negotiation and completion of payment of any claims against the Company, and all
expenses and liabilities that continue to arise or be incurred during the course
of the liquidation  process will reduce the proceeds  available for distribution

<PAGE>
to the Company's  stockholders.  As of November 30, 1998, the Company  estimates
that the initial  amount  available for  distribution  to  stockholders  will be
approximately   $16.8   million   ($2.13  per  share)  which   amount   includes
approximately  $1.0  million of first  quarter  income  earned.  See "THE SALE -
Estimated Expenses; Distribution of Sale Proceeds" and "-The Escrow Agreement."

         In  addition,  as escrowed  funds,  if any, are released to the Company
pursuant to the Escrow Agreement, and following payment or provision for payment
of items  (i)-(iv)  above,  such  amounts  shall be  distributed  to the  common
stockholders as provided in the Plan. See "THE SALE - The Escrow Agreement."

Procedure For Dissolution

         At such  time  as the  Board  of  Directors  has  determined  that  all
necessary  requirements  for dissolution have been satisfied under Delaware law,
the Agreement and the Plan (including any disputes affecting the disbursement of
any amounts held pursuant to the Escrow Agreement),  the appropriate officers of
the Company  shall execute and cause to be filed with the Secretary of the State
of  Delaware,  and  elsewhere  as may be  required or deemed  appropriate,  such
documents  as may be required to  effectuate  the  dissolution  of the  Company,
including a Certificate of Dissolution conforming to the requirements of Section
275 of the DGCL.  From and after the date such  documents are filed and accepted
by the  Secretary  of the State of  Delaware,  the Company  will be deemed to be
completely  dissolved,  but will  continue to exist under  Delaware  law for the
purposes  of  paying,   satisfying  and   discharging   any  existing  debts  or
obligations,  collecting and distributing  its assets,  and doing all other acts
required to liquidate and wind up the Company's  affairs.  Due to the three year
term of the Escrow  Agreement,  the Company is not expected to dissolve until at
least three years from the Effective Date.

Surrender Of Stock Certificates

         The final  distribution  made  under the Plan to the  Company's  Common
stockholders  shall be in complete  redemption  and  cancellation  of all of the
Company's  outstanding  Common Stock. As a condition to the  disbursement of the
final  distribution  to Common  stockholders  which is  expected  to occur on or
around the first  business day  following the third  anniversary  of the Closing
Date,  the Board of  Directors  may  require  stockholders  to  surrender  their
certificates  evidencing the Company's  Common Stock to the Company or its agent
for cancellation. If a stockholder's certificate for Common Stock has been lost,
stolen or destroyed,  such  stockholder  may be required,  as a condition to the
disbursement of the final distribution under the Plan, to furnish to the Company
satisfactory evidence of the loss, theft or destruction thereof, together with a
surety  bond or other  security  or  indemnity  reasonably  satisfactory  to the
Company.  The  Company  will cause a notice and  transmittal  form to be sent to
stockholders advising them of the procedures to be followed for the surrender of
stock  certificates  once the Board of Directors  determines  the date that such
surrender should occur.

<PAGE>
Liquidating Trust

         Under  the  Plan,  the Board of  Directors  may at any time,  if deemed
advisable for any reason to complete the  liquidation  and  distribution  of the
Company's  assets,  transfer the remaining  assets of the Company,  if any, to a
liquidating trust (the "Trust"). The Trust thereupon shall succeed to all of the
then remaining assets of the Company, including the Contingency Reserve, and any
remaining  liabilities and  obligations of the Company.  The sole purpose of the
Trust  would be to  prosecute  and defend  suits and  claims by or  against  the
Company,  to settle and close the  business  of the  Company,  to dispose of and
convey the assets of the  Company,  to satisfy  the  remaining  liabilities  and
obligations  of the  Company  and to  distribute  the  remaining  assets  of the
Company, if any, to its stockholders. Any distribution made from the Trust shall
be made in accordance  with the terms of the Plan concerning  distributions,  as
summarized  above. The Board of Directors may appoint one or more individuals or
entities  to act as trustee or trustees of the Trust and to cause the Company to
enter into a liquidating  trust  agreement with such trustee or trustees on such
terms  and  conditions  as the  Board  determines.  Approval  of the Plan by the
stockholders  also  will  constitute   approval  of  the  trustees  and  of  the
liquidating trust agreement between the Company and such trustees.

Record Date

         Upon  the  filing  and  acceptance  of  the  Company's  Certificate  of
Dissolution  by the Secretary of the State of Delaware,  the Company shall close
its stock transfer books and discontinue recording transfers of its Common Stock
at the close of business on the date the  Certificate of Dissolution is accepted
(the "Record  Date") and  thereafter  certificates  representing  the  Company's
Common Stock shall not be assignable or transferable on the books of the Company
except by will,  intestate  succession  or operation  of law. The  proportionate
interests of all of the  stockholders of the Company shall be fixed on the basis
of their  respective  stockholdings at the close of business on the Record Date,
and, after the Record Date, any distributions  made by the Company shall be made
solely to the stockholders of record at the close of business on the Record Date
except as may be necessary to reflect  subsequent  transfers by will,  intestate
succession or operation of law.

Management of the Company; Powers of Board and Officers

         The Board of  Directors  of the  Company  and  certain  officers of the
Company, at the pleasure of the directors,  will continue to serve following the
Effective Date of the Plan.  These  directors and officers will remain in office
until a successor  is duly  elected and  qualified  or until their  resignation,
death or other  disability;  provided,  however,  that after the  Certificate of
Dissolution is filed with the Secretary of State of Delaware,  the  resignation,
death or other  disability  of any director or officer of the Company  shall not
impair the authority of the surviving or remaining  director(s) or officer(s) to
exercise any of the powers  provided for in the Plan. The Company may pay to the
Company's  directors and  officers,  or any of them,  compensation  for services
rendered in connection with the implementation of the Plan. Approval of the Plan
by the Company's  stockholders also shall constitute  approval of the payment of
any such compensation.

<PAGE>
         The Board and the  officers of the Company  are  authorized  to approve
such changes to the terms of any of the transactions referred to in the Plan, to
interpret any of the  provisions of the Plan,  and to make,  execute and deliver
such other agreements,  conveyances,  assignments,  transfers,  certificates and
other  documents and take such other action as the Board and the officers of the
Company deem  necessary or desirable in order to carry out the provisions of the
Plan and effect the  complete  liquidation  and  dissolution  of the  Company in
accordance  with the Agreement,  the Internal  Revenue Code of 1986, as amended,
and the DGCL and any rules and  regulations  of the SEC or any state  securities
commission,  including,  without  limitation,  any instruments of dissolution or
other  documents,  and withdrawing any  qualification to conduct business in any
state in which the  Company  is so  qualified,  as well as the  preparation  and
filing of any tax returns.

         Also,  under the Plan,  after the  Certificate  of Dissolution is filed
with the  Secretary  of the State of  Delaware,  the Company  shall  continue to
indemnify its officers,  directors,  employees and agents in accordance with its
Certificate  of  Incorporation,  by-laws  and any  contractual  arrangements  as
therein or elsewhere provided,  and such indemnification  shall apply to acts or
omissions of such persons in connection with the  implementation of the Plan and
the  winding up of the  affairs of the  Company.  The  Company's  obligation  to
indemnify such persons may be satisfied out of assets  transferred to the Trust,
if any.  The Board of  Directors  and the  trustees of any Trust are  authorized
under the terms of the Plan to obtain and maintain insurance as may be necessary
to cover the Company's indemnification obligations.

Vote Required; No Appraisal Rights

         Under the Company's Certificate of Incorporation,  the affirmative vote
of the  holders  of at least a  majority  of the  shares  of  Common  Stock  and
Preferred Stock, voting together as a group, with each share of Common Stock and
Preferred  Stock  having one vote,  is required  to approve the Plan.  As of the
Consent Record Date,  Rollins  Investment  Fund owned  approximately  76% of the
outstanding Common Stock of the Company and Rollins Holding Company,  Inc. owned
all of the Company's outstanding Series C Preferred Stock. On December 11, 1998,
each of Rollins  Investment  Fund and Rollins  Holding  Company,  Inc.  signed a
written  consent  voting  their  shares to approve the Sale and the Plan.  These
votes,  by  themselves,  are sufficient to achieve  stockholder  approval of the
Plan.

         Under Delaware law, the stockholders of the Company are not entitled to
any appraisal  rights or dissenters'  rights in connection  with the approval or
the transactions contemplated by the Plan.

Federal Income Tax Consequences of Any Liquidating Distributions to Stockholders

         The   liquidation   of  the  Company  will  have  federal   income  tax
consequences  for  the  stockholders  of  the  Company.  The  following  summary
discusses the material federal income tax consequences. It is not intended to be
exhaustive  and does not address  state,  municipal or foreign tax laws. It also
<PAGE>

does  not  address  the   circumstances   of  special   classes  or   individual
circumstances  of taxpayers,  including,  without  limitation,  foreign persons.
Stockholders  are advised to consult with their own tax advisers  regarding  the
particular  consequences  to them as a result of the liquidation and dissolution
of the Company.

         Provided  Valley  properly  adopts the Plan and follows  the  necessary
formalities of liquidating,  Valley may make  liquidating  distributions  to its
stockholders  of the proceeds from the sale of its assets.  These  distributions
will be tax-free to a stockholder  to the extent of the  stockholder's  basis in
the Valley stock owned by the stockholder. Aggregate distributions received by a
stockholder  in excess of basis will be taxable as capital gain to a stockholder
who holds his Valley stock as a capital  asset and who has held these shares for
more than one year. If aggregate liquidating  distributions to a stockholder are
less than the basis of such  stockholder's  shares,  any loss  recognized by the
stockholder will be recognized in the year in which the stockholder receives the
final liquidating distribution to which such stockholder is entitled.

                    AMENDMENT TO CERTIFICATE OF INCORPORATION
                             OF VALLEY SYSTEMS, INC.

         Under the  DGCL,  the  affirmative  vote of the  holders  of at least a
majority of the shares of Common Stock and Preferred Stock, voting together as a
group,  with each share of Common Stock and Preferred  Stock having one vote, is
required to approve the amendment to Valley's  Certificate of Incorporation.  On
December 11, 1998, each of Rollins  Investment Fund, the holder of a majority of
the Company's  outstanding Common Stock, and Rollins Holding Company,  Inc., the
holder  of all of the  Company's  Series C  Preferred  Stock,  signed a  written
consent voting their shares to approve the amendment to Valley's  Certificate of
Incorporation,  subject to the Sale being consummated pursuant to the Agreement.
These votes, by themselves,  are sufficient to achieve  stockholder  approval of
the amendment to Valley's Certificate of Incorporation.

         Pursuant to the  Agreement,  Valley and the  Subsidiary are required to
discontinue use of the name "Valley  Systems" or any derivations  thereof within
30 days after the Closing. In order to accomplish this, Valley's  Certificate of
Incorporation  must  be  amended.  The  amendment  pertains  only  to the  first
paragraph  of the  Certificate  of  Incorporation  of Valley.  As amended,  such
paragraph would be as follows:

           "First - The name of the Corporation is VSI Liquidation Corp.
      (the "Corporation")"

         In the event  the Sale is not  consummated,  the  change in the name of
Valley and the Subsidiary will not be effectuated.


                    UNAUDITED PRO FORMA FINANCIAL INFORMATION

         The following pro forma consolidated balance sheet of the Company as of
September  30, 1998,  and the pro forma  consolidated  income  statement for the
three months then ended, and the pro forma consolidated income statement for the
year ended June 30, 1998,  give effect to the sale of  substantially  all of the
assets,  except cash, of the Company for approximately $29.8 million in cash and
the  assumption of certain  liabilities.  In connection  with the Sale,  the pro
<PAGE>

forma financial statements also give effect to the Company's intention to pay an
initial  distribution  of $2.13  per share  for a total of  approximately  $16.8
million  (which  amount  includes  approximately  $1.0 million of first  quarter
income earned) on a pro rata basis.

         The  following  pro forma  unaudited  consolidated  balance sheet as of
September  30, 1998,  reflects the Sale as if it occurred on that date,  and the
consolidated income statements for the three months ended September 30, 1998 and
the year ended June 30, 1998 each reflect the Sale as if it were  consummated at
the beginning of the respective periods presented.

         The Company  expects to maintain its  corporate  existence for at least
three years following the Sale during which time it will collect portions of the
escrowed funds and will incur administrative  expenses.  The pro forma unaudited
financial information is not necessarily indicative of what the actual financial
position of the Company  would have been had the Sale  occurred at September 30,
1998 or the results of operations had the transaction  occurred at the beginning
of the three months ended  September  30, 1998,  or the year ended June 30, 1998
nor does it purport to  represent  the future  financial  position or results of
operations of the Company.

         The pro forma financial  information should be read in conjunction with
the Company's  Form 10-K, as amended,  for the year ended June 30, 1998 and Form
10-Q for the quarter ended  September 30, 1998 as filed with the SEC.  Copies of
these documents accompany this Information Statement.


<PAGE>

<TABLE>
<CAPTION>
                                               Valley Systems, Inc.
                                       Pro Forma Consolidated Balance Sheet
                                             As of September 30, 1998

                                          Unaudited
                                          Historical
                                          September        Adjustments          Actions taken       Pro Forma,
                                          30, 1998         to record sale       after sale          as adjusted
                                          -----------      --------------       -------------       -----------
<S>                                      <C>               <C>                   <C>                <C>    
ASSETS

Current assets:
     Cash                                $       48,916    $   26,731,805  [1]   $  (1,090,000) [3]  $    3,300,711
                                                                 (48,916)  [1]      (5,500,000) [4]
                                                                                   (16,841,094) [5]
     Accounts receivable                       7,163,059       (7,163,059) [1]                                   -- 
     Prepaid supplies                            550,833         (550,833) [1]                                   --
     Prepaid expenses                            265,064         (265,064) [1]                                   --
                                           -------------     -------------        -------------       -------------                
        Total current assets                   8,027,872        18,703,933         (23,431,094)           3,300,711
Property and equipment, net                    9,794,261       (9,794,261) [1]                                   --
Intangible assets                                376,750         (376,750) [1]
Escrow deposits                                                  4,000,000 [1]                            4,000,000
                                           -------------     -------------        -------------       -------------  
        Total assets                      $   18,198,883    $   12,532,922       $ (23,431,094)      $    7,300,711
                                           =============     =============        =============       =============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
     Accounts payable                     $      722,304    $    (722,304) [1]                       $           --
     Accrued expenses                          1,756,807       (1,756,807) [1]      (1,090,000) [3]              --
                                                                 1,090,000 [1]
     Current portion of long-term debt           845,425         (845,425) [1]                                   --
                                                      --
     Income tax payable                                          2,822,871 [2]                            2,822,871
                                           -------------     -------------        -------------        ------------  
        Total current liabilities              3,324,536           588,335          (1,090,000)           2,822,871
                                                                                                              --
Long-term debt                                 8,589,720       (8,589,720) [1]
Commitments and contingencies
Stockholders' Equity:
     Preferred stock                               5,500                                (5,500) [4]              --
     Common stock                                 85,121                                                     85,121
     Paid-in capital                          26,786,040                            (5,494,500) [4]       5,075,727
                                                                                   (16,215,813) [5]
     Accumulated deficit                    (19,909,026)        23,357,178 [1]        (625,281) [5]              --
                                                               (2,822,871) [2]
     Treasury stock - at cost                  (683,008)                                                  (683,008)
                                            ------------      ------------        -------------        ------------
                                               6,284,627        20,534,307         (22,341,094)           4,477,840
                                            ------------      -------------       -------------        ------------   

      Total liabilities and stockholders' $   18,198,883    $   12,532,922       $ (23,431,094)      $    7,300,711
      equity
                                           =============    ==============       ===============     ===============

</TABLE>

<PAGE>

<TABLE>
<CAPTION>

                                               Valley Systems, Inc.
                                      Pro Forma Consolidated Income Statement
                                   For the Three Months Ended September 30, 1998

                                                     Unaudited   Historical                           
                                                     Three   months   ended     Adjustments           Pro Forma, as
                                                     September 30, 1998        to record sale         adjusted
                                                     -----------------------    ------------------    ---------------
<S>                                                   <C>                    <C>                      <C>  
Sales                                                 $       7,597,337      $  (7,597,337)           $      --   
Cost of sales                                                 4,643,927         (4,643,927)                  --
                                                       ----------------        ------------            ---------                   
    Gross profit                                              2,953,410         (2,953,410)                  --
Selling, general and administrative expenses                  1,785,594         (1,757,594) [6]          28,000  [6]
Interest expense                                                140,532           (140,532)                  --
                                                       ----------------        ------------            ---------
Income (loss) from operations before income taxes             1,027,284         (1,055,284)             (28,000)
Income taxes                                                         --            (11,000)             (11,000)
                                                       ----------------        ------------            ---------
     Net income (loss)                                $       1,027,284       $ (1,044,284)           $ (17,000)
                                                       ================        ============            ==========
Earnings per share:
Net earnings per common share - basic                 $            0.12       $      (0.12)           $      .00
                                                       ================        ============            ==========
Net earnings per common share - assuming dilution     $            0.12              (0.12)           $      .00
                                                       ================        ============            ========== 
</TABLE>                           



<PAGE>

<TABLE>
<CAPTION>
                                                Valley System, Inc.
                                      Pro Forma Consolidated Income Statement
                                         For the Year Ended June 30, 1998


                                                      Historical                            
                                                      Year ended                Adjustments                 Pro Forma,
                                                      June 30, 1998             to record sale              as adjusted
                                                      --------------            ---------------          ----------------
<S>                                                   <C>                       <C>                    <C>    
Sales                                                 $       24,431,385        $ (24,431,385)         $
Cost of sales                                                 15,391,490          (15,391,490)                     --
                                                       -----------------         -------------          -------------
     Gross profit                                              9,039,895           (9,039,895)                     --
Selling, general and administrative expenses                   7,144,739           (7,032,739)[6]             112,000 [6]
Interest expense                                                 593,127             (593,127)                     --
                                                       -----------------         -------------          ------------- 
Income (loss) from operations before income taxes     $        1,302,029           (1,414,029)              (112,000)
Income taxes                                                          --              (44,000)               (44,000)
                                                       -----------------         -------------          -------------

     Net income (loss)                                $        1,302,029        $  (1,370,029)         $     (68,000)
                                                       =================         =============          =============
Earnings per share:

Net earnings per common share - basic                 $             0.12        $       (0.13)         $        (.01)
                                                       =================         =============          =============
Net earnings per common share - assuming dilution     $             0.12        $       (0.13)         $        (.01)
                                                       =================         =============          =============
</TABLE>



<PAGE>


                              Valley Systems, Inc.
                        Notes to Pro Forma Balance Sheet
               As of September 30, 1998 and Notes to the Pro Forma
               Consolidated Income Statement for the Three Months
            Ended September 30, 1998 and the Year Ended June 30, 1998



[1]  Adjustment  to reflect the sale of  substantially  all of the assets of the
     Company and assumption of substantially all of the Company's liabilities by
     HydroChem Industrial  Services,  Inc. for $29.8 million. The purchase price
     has been  adjusted  for the  change in net  assets  from  June 30,  1998 to
     September 30, 1998.  Expected expenses of the sale, and other non-recurring
     items in connection with the transaction are as follows:


                  Legal fees                             $   300,000
                  Accounting and auditing fees                60,000
                  Severance pay                              160,000
                  Termination of stock options               570,000
                                                           ---------  
                           Total                          $1,090,000

[2]  To reflect income taxes on the Sale.


[3]  To reflect payment of liabilities not assumed as part of the Sale.

[4]      To reflect redemption of the Series C Preferred Stock.


[5]  To reflect a distribution of $2.13 per share to owners of common stock.

[6]  Reflects  estimated  administrative  expenses that will continue  until the
     Company is dissolved.


<PAGE>


                AVAILABLE INFORMATION AND SOURCES OF INFORMATION

         The  Company  is  subject  to  the  information   requirements  of  the
Securities  Exchange Act of 1934, as amended (the  "Exchange  Act")  (Commission
File No. 0-19343),  and in accordance  therewith files periodic  reports,  proxy
statements  and  other  information  with  the  SEC  relating  to its  business,
financial statements and other matters. Such reports, proxy statements and other
information  may be  inspected  and  copied at the public  reference  facilities
maintained by the SEC at Room 1024,  450 Fifth Street,  N.W.,  Judiciary  Plaza,
Washington,  D.C. 20549 and at the public reference facilities maintained by the
SEC at its regional offices located at Seven World Trade Center, Suite 1300, New
York, New York, 10048; and Citicorp Center, 500 West Madison Street,  Room 1400,
Chicago,  Illinois  60661-2511.  Copies  of such  material  can be  obtained  at
prescribed  rates by writing to the SEC,  Public  Reference  Section,  450 Fifth
Street,  N.W.,  Washington,  D.C. 20549.  The SEC also maintains a web site that
contains  reports,  proxy  and  information  statements  and  other  information
regarding the Company and the  Registration  Statement.  The address of that web
site is  http://www.sec.gov.  The Company's Common Stock is listed on The Nasdaq
SmallCap Market,  and other information with respect to the Company is available
for inspection at 1735 K Street, NW Washington,  D.C. 20006-1500.  The Company's
executive  offices are located at 11580 Lafayette Drive, NW, Canal Fulton,  Ohio
44616, telephone: (330) 854-4526.

         No persons have been  authorized to give any information or to make any
representation,  other than those contained in this  Information  Statement,  in
connection with the  information  contained  herein,  and if given or made, such
information or representation  must not be relied upon as having been authorized
by the Company or any other person.  The delivery of this Information  Statement
shall not, under any circumstances, create an implication that there has been no
change  in the  affairs  of the  Company  since  the  date  hereof  or that  the
information herein is correct as of any time subsequent to the date hereof.

                INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

         The  information in the following  documents  filed by the Company with
the Securities  Exchange  Commission (File No. 0-19343) pursuant to the Exchange
Act is incorporated by reference in this Information Statement:

1.   The Company's  Annual Report on Form 10-K, as amended,  for the fiscal year
     ended June 30, 1998;

2.   The Company's Quarterly Report on Form 10-Q for the quarter ended September
     30, 1998;

3.   All  documents  filed by the Company  pursuant to Section 13(a) or 15(d) of
     the Exchange Act after the date of this Information  Statement and prior to
     the closing of the Sale shall be deemed  incorporated  by reference in this
     Information  Statement  and to be a part  hereof from the date of filing of
     such documents.

         Any  statement  contained  herein  or in a  previously  filed  document
incorporated or deemed to be incorporated by reference herein shall be deemed to
<PAGE>


be modified or  superseded  for  purposes of this  Information  Statement to the
extent  that a statement  contained  herein or in any other  subsequently  filed
document  which also is or was deemed to be  incorporated  by  reference  herein
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Information Statement.

         The information  relating to the Company  contained in this Information
Statement   should  be  read  together  with  the   information   and  documents
incorporated by reference. The Company's Annual Report on Form 10-K, as amended,
for the fiscal year ended June 30, 1998,  and Quarterly  Report on Form 10-Q for
the quarter ended September 30, 1998, accompany this Information Statement.

         This Information  Statement  incorporates  documents by reference which
are not  presented  herein or delivered  herewith.  Such  documents  (other than
Exhibits to such documents,  unless such Exhibits are specifically  incorporated
by  reference)  are  available  without  charge  to any  person,  including  any
beneficial owner, to whom this Information Statement is delivered,  upon written
or oral  request.  Request  for such  documents  should be directed to Dennis D.
Sheets, Secretary of the Company, telephone: (330) 854-4526.


<PAGE>

                                   APPENDIX A

                           SECOND AMENDED AND RESTATED
                            ASSET PURCHASE AGREEMENT

         This Second Amended and Restated  Asset  Purchase  Agreement is entered
into as of the 8th day of  September  1998,  by and among  HydroChem  Industrial
Services,  Inc.,  a Delaware  corporation  ("Buyer"),  Valley  Systems,  Inc., a
Delaware   corporation  ("VSI")  and  Valley  Systems  of  Ohio,  Inc.  an  Ohio
corporation and wholly-owned subsidiary of VSI ("Seller").

         WHEREAS,  Buyer and VSI have entered into that certain  Asset  Purchase
Agreement dated September 8, 1998,  subsequently amended by that certain Amended
and  Restated  Asset  Purchase  Agreement  dated as of  September 8, 1998 (as so
amended and restated, the "Purchase Agreement"); and

         WHEREAS,  the assets intended to be purchased  pursuant to the Purchase
Agreement  (other than certain  assets which are owned by VSI) are the assets of
Seller  and the  obligations  and  liabilities  intended  to be assumed by Buyer
pursuant to the Purchase Agreement are the obligations and liabilities of Seller
as well as VSI; and

         WHEREAS,  VSI is willing to be jointly and severally  responsible  with
Seller for any  obligations  of Seller  which have arisen or may arise under the
Purchase Agreement; and

         WHEREAS,  the parties  hereto  desire to further  amend and restate the
Purchase Agreement to modify the provisions relating to the determination of the
Closing Date and to make such other modifications as are provided for herein.

         NOW, THEREFORE, in consideration of the foregoing,  the mutual promises
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency of which are hereby  acknowledged by the parties hereto, the parties
hereto agree as follows:

                                   Definitions

         For purposes of this Agreement,  the following terms have the following
meanings.

         "affiliate"--as defined in Section 4.1.

         "Agreement"--this Second Amended and Restated Asset Purchase Agreement.

         "Assets"--as defined in Section 1.1.1.

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         "Bill of Sale,  Assignment  and  Assumption  Agreement"--as  defined in
Section 1.1.3.

         "Board"--as defined in Section 1.5.

         "Business Property Rights"--as defined in Section 2.16.2.

         "Buyer"--HydroChem Industrial Services, Inc., a Delaware corporation.

         "Buyer Indemnitees"--as defined in Section 4.1.

         "Buyer's Ceiling Amount"--as defined in Section 4.4.2.

         "CERCLA"--the Comprehensive Environmental Response,  Compensation,  and
Liability Act of 1980 or any  successor  law, and  regulations  and rules issued
pursuant to that Act or any successor law.

         "Claim"--as defined in Section 4.3.

         "Closing"--as defined in Section 1.6.

         "Closing Balance Sheet"--as defined in Section 2.8.5.

         "Closing Date"--as defined in Section 1.6.

         "Closing Financial Statements"--as defined in Section 2.8.5.

         "Closing Schedules"--as defined in Section 1.7.
 .
         "Code"--the  Internal  Revenue  Code  of  1986,  as  amended,  and  the
regulations and rules issued pursuant thereto, as amended.

         "control"--as defined in Section 4.1.

         "Customer"--as defined in Section 5.2.1.

         "Delivery Date"--as defined in Section 1.7.

         "Employee"--any employee of VSI or Seller.

         "Encumbrances"--options,   indentures,   mortgages,  leases,  licenses,
restrictions (other than restrictions under applicable  securities laws), liens,
charges,  assessments,  pledges,  security interests,  adverse claims, equities,
limitations,  community property  interests,  conditions,  equitable  interests,
rights of first  refusal,  easements,  servitudes or other  encumbrances  of any
kind, including any restriction on use, voting, transfer,  receipt of income, or
exercise of any other attribute of ownership.
<PAGE>

         "Environment"--soil,  land surface or subsurface strata, surface waters
(including navigable water, ocean waters,  streams,  ponds, drainage basins, and
wetlands), ground water, sediments, ambient air and natural resources.

         "Environmental Contamination"--as defined in Section 4.5.1.

         "Environmental Due Diligence Review"--as defined in Section 5.5.2.

         "Environmental  Law"--any  federal,  state,  or local law that  governs
protection  of  the  Environment,  including,  without  limitation,  those  laws
relating  to the  Release,  storage or handling of  Hazardous  Materials;  those
relating to the treatment, storage, transport,  disposal, or other management of
waste   materials  of  any  kind,  and  those  relating  to  the  protection  of
Environmentally sensitive areas.

         "Environmental   Liabilities"--any   costs,  damages,   expense,  fine,
penalty,  costs of investigation  and remediation or any other liability arising
from or under any Environmental Law.

         "Environmental Remediation"--as defined in Section 4.5.2.

         "ERISA"--the  Employee  Retirement  Income  Security Act of 1974 or any
successor  law, and  regulations  and rules  issued  pursuant to that Act or any
successor law.

         "Escrow Agent"--as defined in Section 5.3.1

         "Escrow Agreement"--as defined in Section 5.3.1.

         "Escrow Fund"--as defined in Section 1.2.

         "Exchange Act"--as defined in Section 2.8.1.

         "Expenses"--as defined in Section 5.11.

         "Facilities"--any  real  property,   leaseholds,   or  other  interests
currently  owned or  operated  by VSI or  Seller  and any  buildings,  plants or
structures currently owned or operated by VSI or Seller.

         "Former Facilities"--any real property,  leaseholds, or other interests
formerly  owned or  operated  by VSI or  Seller  and any  buildings,  plants  or
structures formerly owned or operated by VSI or Seller.

         "Financial Statements"--as defined in Section 2.8.4.

<PAGE>

         "Floor Amount"--as defined in Section 4.4.

         "fraud"--fraud  perpetrated  or alleged to have been  perpetrated by an
Indemnifying Party against an Indemnified Party.

         "GAAP"--United States generally accepted accounting principles, applied
on a consistent basis.

         "Governmental Body"--any:

         (a) nation,  state,  county,  city, town, village,  district,  or other
jurisdiction of any nature;

         (b) federal, state, local, municipal, foreign, or other government;

         (c)  governmental  authority of any nature  (including any governmental
agency, branch, department, or entity and any court or other tribunal);

         (d) multi-national organization or body; or

         (e) body  exercising,  or entitled  to  exercise,  any  administrative,
executive,  judicial,  legislative,  police,  regulatory, or taxing authority or
power of any nature.

         "Hazardous   Materials"--any   "hazardous   substance,"  "pollutant  or
contaminant,"  and  "petroleum"  and "natural  gas  liquids," as those terms are
defined or used in Section  101 of CERCLA,  and any other  substances  regulated
because  of their  effect  or  potential  effect  on public  health  and/or  the
Environment  including,  without limitation,  PCB's, lead paint,  asbestos,  and
radioactive materials.

         "HSR Act"--the  Hart-Scott-Rodino Antitrust Improvements Act of 1976 or
any successor law, and  regulations and rules issued pursuant to that Act or any
successor law.

         "Indemnified Party"--as defined in Section 4.3.

         "Indemnifying Party"--as defined in Section 4.3.

         "knowledge"--the  actual knowledge of any director,  officer,  regional
manager, or branch manager of VSI or Seller.

         "Leases"--as defined in Section 2.12.2.

         "Legal  Requirement"--any  applicable federal, state, local, municipal,
foreign,   international,   multinational,   or  other   administrative   order,
constitution,  law, ordinance, principle of common law, regulation,  statute, or
treaty.
<PAGE>
         "Losses"--as defined in Section 4.1.

         "material"--an  item is  "material"  if its  presence  or  absence,  as
required by the context,  would have a material  adverse effect upon the assets,
financial condition, results of operations,  business or affairs of a Person and
any  affiliates of such Person with whom such Person,  in accordance  with GAAP,
consolidates financial statements, taken as a whole.

         "Order"--any award, decision,  injunction,  judgment, order, ruling, or
verdict entered, issued, made, or rendered by any court,  administrative agency,
or other Governmental Body or by any arbitrator.

         "Person"--any   individual,   corporation   (including  any  non-profit
corporation),  general or limited partnership,  limited liability company, joint
venture, estate, trust, association,  organization, labor union, or other entity
or Governmental Body.

         "Preliminary Schedules"--as defined in Section 1.7.
 .
         "Proceeding"--any action, arbitration,  audit, hearing,  investigation,
inquiry,   litigation,   or  suit  (whether  civil,  criminal,   administrative,
investigative,  or  informal)  commenced,  brought,  conducted,  or  heard by or
before, or otherwise involving, any Governmental Body or arbitrator.

         "Proxy Materials"--as defined in Section 1.5.

         "Purchase Price"--as defined in Section 1.2.

         "Receivables Guaranty"--as defined in Section 5.1.

         "Release"--any spilling,  leaking, emitting,  discharging,  depositing,
escaping,  leaching,  dumping, pumping, pouring, emptying, or injecting into the
Environment, whether intentional or unintentional.

         "Rules"--as defined in Section 5.15.

         "Schedules"--all Schedules to this Agreement, including the Preliminary
Schedules and the Closing Schedules.

         "SEC"--as defined in Section 2.8.2.
 .
         "SEC Reports"--as defined in Section 2.8.2.

         "Securities Act"--as defined in Section 2.8.1.
<PAGE>

         "Seller"--Valley  Systems of Ohio, Inc., an Ohio corporation (including
all prior subsidiaries).

         "Seller's Ceiling Amount"--as defined in Section 4.4.1.

         "Stockholders"--Rollins Investment Fund; Rollins Holding Company, Inc.;
and their respective affiliates.

         "Superior Takeover Proposal"--as defined in Section 5.6.

         "Termination Date"--as defined in Section 5.4.1.

         "Third Party"--as defined in Section 5.6.

         "Third Party Claim"--as defined in Section 4.3.

         "Threatened"--a  claim,  Proceeding,  dispute,  action, or other matter
will be deemed to have been "Threatened" if any demand,  notice or statement has
been made (orally, to the knowledge of Seller, or in writing).

          "VSI"--Valley  Systems,  Inc., a Delaware  corporation  (including all
prior subsidiaries).

         "WARN"--as defined in Section 2.18.7.

          1. Purchase and Sale of Assets; Assumption of Specified Liabilities.

                  1.1      Agreement to Purchase and Sell.

                           1.1.1 Upon the terms and  subject  to the  conditions
                  set forth herein and upon the  representations  and warranties
                  made herein by each of the parties hereto,  at the Closing (as
                  such  term is  hereinafter  defined),  each of VSI and  Seller
                  respectively shall sell, grant, convey,  assign,  transfer and
                  deliver to Buyer,  and Buyer shall  purchase  and acquire from
                  each of VSI and  Seller  respectively,  all of the  respective
                  assets and properties of each of VSI and Seller of every kind,
                  nature and description  (wherever located),  as the same shall
                  exist on the Closing Date,  except those assets and properties
                  specifically  excluded  pursuant to Section 1.1.2 hereof (said
                  assets  and  properties  so to  be  sold,  granted,  conveyed,
                  transferred, assigned and delivered to Buyer being hereinafter
                  collectively  referred to as the "Assets").  Without  limiting
                  the generality of the foregoing, the Assets shall include, but
                  shall not be limited to, the following  respective  assets and
                  properties of each of VSI and Seller:

<PAGE>
                                    (i) all  real  property,  interests  in real
                           property (including, without limitation, leases), and
                           structures and improvements located on real property,
                           and all the easements and uses which benefit any such
                           real property;

                                    (ii)    all notes and accounts receivable;

                                    (iii)    all     machinery,     inventories,
                           inventories   of   parts,    computers,    furniture,
                           furnishings, fixtures, office supplies and equipment,
                           automobiles, trucks, vehicles, returnable containers,
                           tools and parts, and work in process;

                                    (iv)  all  technology,   know-how,  designs,
                           devices, processes,  methods,  inventions,  drawings,
                           schematics, specifications,  standards, trade secrets
                           and other  proprietary  information,  and all patents
                           and  applications  therefor  and all  trademarks  and
                           trade names,  trademark and trade name registrations,
                           service   marks  and  service   mark   registrations,
                           copyrights   and   copyright    registrations,    the
                           applications   therefor  and  the  licenses  thereto,
                           together   with  the   goodwill   and  the   business
                           appurtenant thereto;

                                    (v)      all      drawings,      blueprints,
                           specifications, designs and data of Seller (including
                           drawings,  blueprints,  specifications,  designs  and
                           data of Seller  used by or in the  possession  of any
                           Third Party);

                                    (vi)  all   catalogues,   brochures,   sales
                           literature,  promotional  material and other  selling
                           material of Seller;

                                    (vii) all books and  records  and all files,
                           documents,  papers, agreements,  books of account and
                           other  records  pertaining  to the  Assets  or to the
                           business of Seller  which are located at the offices,
                           plants,   warehouses  or  other   locations  used  in
                           connection with the Assets;

                                    (viii) all  rights,  title and  interest  of
                           Seller  under all  contracts,  agreements,  licenses,
                           leases,  sales  orders,  purchase  orders  and  other
                           commitments Buyer will assume pursuant to Section 1.3
                           hereof;

                                    (ix)  all  laboratory  equipment  (including
                           laboratory   notes   and   supplies)   and   chemical
                           inventories;

<PAGE>
                                    (x) all lists of past, present and qualified
                           prospective  customers of the business of Seller;

                                    (xi) all  goodwill  relating to the business
                           of Seller as a going concern, together with the right
                           to  represent  oneself  to third  parties  as the new
                           owner of such business;

                                    (xii) all  governmental and product licenses
                           and   permits,   approvals,    license   and   permit
                           applications   and  license   and  permit   amendment
                           applications;

                                    (xiii) all  claims  against  third  parties,
                           whether or not  asserted  and whether now existing or
                           hereafter arising,  related to the business of Seller
                           or the Assets  (including,  without  limitation,  all
                           claims  based on any  indemnities  or  warranties  in
                           favor of Seller relating to any of the Assets);

                                    (xiv) all other  assets  and rights of every
                           kind  and  nature,  real  or  personal,  tangible  or
                           intangible, of Seller;

                                    (xv)  all  cash  on  hand,   including  bank
                           accounts  (other than the Purchase  Price  depository
                           account) and temporary cash investments;

                                    (xvi) all  claims  for  refunds of taxes and
                           other  governmental  charges for periods ending on or
                           prior to the Closing Date; and

                                    (xvii) all safe deposit boxes and lockboxes,
                           as well as the contents thereof.

                           Without limiting the generality of the foregoing, the
                  Assets  shall,  except as set forth in Section  1.1.2  hereof,
                  include  all  assets  set  forth in a  detailed  list of fixed
                  assets  as of June 30,  1998,  prepared  from  the  accounting
                  records of VSI and Seller, indicating the respective assets of
                  VSI and Seller, and attached hereto as Schedule 1.1.1, and all
                  such assets as may have been  acquired by VSI or Seller  which
                  would be included on a list  prepared in like manner from such
                  accounting  records as of the  Closing  Date,  except any such
                  assets which may have been disposed of since June 30, 1998, in
                  the  ordinary  course of business on a basis  consistent  with
                  past practice.

                           1.1.2  Anything  herein  contained  to  the  contrary
                  notwithstanding,   the   following   respective   assets   and
<PAGE>

                  properties of each of VSI and Seller are specifically excluded
                  from the Assets and shall be retained  respectively  by VSI or
                  Seller:

                                  (i)  claims or rights  against  third  parties
                         relating to liabilities  or  obligations  which are not
                         expressly  assumed by Buyer  pursuant  to  Section  1.3
                         hereof;

                                  (ii)   rights   under    insurance    policies
                         (including directors and officers liability insurance),
                         including  rights  to  any  cancellation  value  on the
                         Closing Date;

                                  (iii) the stock books,  minute books and other
                         corporate  and  financial  books and records of each of
                         VSI and Seller (but each of VSI and Seller shall,  upon
                         request  by  Buyer  and,  after  Closing,   at  Buyer's
                         expense,  provide  copies of such  financial  books and
                         records to Buyer);

                                  (iv) all shares of capital stock of Seller;

                                  (v)  funds held in respect  of  the VSI 401(k)
                         plan; and

                                  (vi) any  prepaid  expenses  of VSI or  Seller
                         incurred   in   connection   with   the    negotiation,
                         preparation, execution or performance of this Agreement
                         or the transactions contemplated hereby.

                         1.1.3 Subject to Section 1.1.4 hereof,  at the Closing,
                each of VSI and Seller shall  execute and deliver to Buyer (i) a
                Bill of Sale, Assignment and Assumption  Agreement,  in the form
                attached  hereto as Exhibit  "A" (the "Bill of Sale,  Assignment
                and Assumption Agreement"), under the terms of which each of VSI
                and Seller  shall sell,  grant,  convey,  assign,  transfer  and
                deliver their  respective  portions of the Assets to Buyer,  and
                (ii) such other bills of sale, deeds,  instruments of assignment
                and other appropriate  documents as may be reasonably  requested
                by  Buyer in order to  carry  out the  intentions  and  purposes
                hereof.

                         1.1.4 Nothing in this  Agreement  shall be construed as
                an attempt or agreement to assign (i) any  contract,  agreement,
                license,  lease, sales order, purchase order or other commitment
                which is nonassignable without the consent of the other party or
                parties  thereto  unless such  consent  shall have been given or
                (ii) any  contract or claim as to which all the remedies for the
                enforcement  thereof  enjoyed by VSI or Seller would not pass to
                Buyer as an incident of the assignments  provided for hereby. In
                order,  however, that the full value of every contract and claim
                of the  character  described  in  clauses  (i) and  (ii) of this
                Section  1.1.4 and all claims and demands on such  contracts may
                be realized,  each of VSI and Seller shall,  by itself or by its
                agents,  at the request and expense and under the  direction  of
<PAGE>

                Buyer,  until the entire Escrow Fund has been released  pursuant
                to Section 5.3 hereof, in the name of VSI or Seller or otherwise
                as Buyer shall  specify and as shall be permitted  by law,  take
                all such  action  and do or cause to be done all such  things as
                shall in the reasonable  opinion of Buyer be necessary or proper
                (x) in order that the rights and  obligations of each of VSI and
                Seller under such contracts  shall be preserved and (y) for, and
                to facilitate, the collection of the monies due and payable, and
                to become due and  payable,  to VSI or Seller in and under every
                such  contract  and claim and in respect of every such claim and
                demand,  and each of VSI and Seller  shall hold the same for the
                benefit of and pay the same over promptly to Buyer.

         1.2  Purchase  Price;  payment.  Upon  the  terms  and  subject  to the
conditions set forth herein, in reliance upon the  representations,  warranties,
covenants and  agreements  of each of VSI and Seller  contained  herein,  and in
exchange for the sale, grant, conveyance,  assignment,  transfer and delivery of
the Assets,  Buyer  agrees,  subject to Section  1.9  hereof,  to pay to VSI and
Seller the sum of $29,800,771 (the "Purchase Price"),  payable at the Closing as
follows:  (i) by wire transfer of $25,800,771 in immediately  available funds to
VSI and Seller in such bank accounts as designated by Seller in writing to Buyer
at least 24 hours prior to the Closing;  and (ii) by depositing  $4,000,000 (the
"Escrow  Fund") with the Escrow Agent to be held and disposed of pursuant to the
Escrow Agreement.

         1.3  Asumption  of  Specified  Liabilities.  At  the  Closing,  and  as
additional consideration for the sale, grant, conveyance,  assignment,  transfer
and delivery of the Assets, subject,  however, to Sections 1.1.4 and 1.4 hereof,
Buyer shall  assume and agree to pay,  perform and  discharge  when due only the
following:

                         (i) those  liabilities  or  obligations of Seller which
                are listed on Schedule 1.3A hereof (which shall be the detail of
                the  liabilities  reflected in the balance sheet included in the
                Financial  Statements  dated  June 30,  1998 as  updated  to the
                Closing  Date  pursuant  to Section 1.9  hereof)  which  updated
                Schedule 1.3A shall  prevail in the event of a conflict  between
                the  Closing  Balance  Sheet  and  such  updated  Schedule  1.3A
                (depending  upon the category of the liability  being assumed by
                Buyer,  the parties shall mutually agree (as denoted in Schedule
                1.3A) whether (i) Buyer will pay the liability to the obligee on
                behalf of Seller up to the amount of the accrued liability, (ii)
                Buyer will pay the amount of the accrued  liability  directly to
                Seller and Seller  will pay the  liability  to the  obligee,  or
                (iii)  Buyer  will pay the  liability  to the  obligee up to the
                amount of the accrued liability) and

                         (ii) those liabilities and obligations of either of VSI
                or Seller which arise under the terms of a contract,  agreement,
                license,  lease, sales order, purchase order or other commitment

<PAGE>
                which is listed on  Schedule  1.3B  hereof  (as  updated  to the
                Closing Date  pursuant to Section 1.9 hereof) or is not required
                by the last  sentence of this  Section  1.3(ii) to be so listed.
                Schedule 1.3B shall only list (x) master  service  agreements of
                Seller assumed by Buyer (y) agreements under which either VSI or
                Seller have indemnified or provided a guaranty to any Person and
                (z)  contracts,  agreements,  licenses,  leases,  sales  orders,
                purchase orders or other  commitments of Seller assumed by Buyer
                which involve  services or annual  payments to or from either of
                VSI or Seller in excess of $10,000; and

                         (iii) all liabilities and obligations of VSI and Seller
                incurred in the ordinary  course of business on or after January
                1, 1999 through the Closing Date.

                Subject to Sections 1.1.4 and 1.4 hereof, at the Closing,  Buyer
        shall  execute  and deliver to Seller the Bill of Sale,  Assignment  and
        Assumption  Agreement assuming the liabilities and obligations of Seller
        referred to in this Section 1.3.

         1.4 Non-Assumption of Certain Liabilities.  Buyer is not assuming,  and
shall not be deemed to have assumed, any liabilities or obligations of Seller or
VSI of any kind or nature  whatsoever,  except as expressly  provided in Section
1.3 hereof.  Anything in Section 1.3 hereof or elsewhere  herein to the contrary
notwithstanding  and without  limiting the  generality of the  foregoing,  it is
hereby  agreed  that  Buyer is not  assuming,  and  shall  not be deemed to have
assumed,  any liability and shall not have any obligation for or with respect to
any liability or obligation of VSI or Seller:

                         (i) under any  employee  benefit  plan of VSI or Seller
                other than any accrued liabilities specifically assumed by Buyer
                pursuant to Section 1.3 above;

                         (ii) in respect of (x) any sales,  use or excise taxes,
                income taxes,  taxes based on or measured by income or franchise
                taxes  attributable  to periods or events  prior to or ending on
                the Closing Date or (y) any sales,  use or excise taxes,  income
                taxes,  or  any  other  taxes,  legal,  accounting,   brokerage,
                finder's  fees, or other  expenses of whatsoever  kind or nature
                incurred  by  VSI  or  Seller  or  any  affiliate,  stockholder,

<PAGE>
                director,  Employee  or  officer of VSI or Seller as a result of
                the consummation of the transactions  contemplated hereby (other
                than such  taxes,  fees and  expenses  which are  accrued in the
                ordinary course of business prior to Closing);

                         (iii)  arising  out of any action,  condition,  suit or
                proceeding  based upon an event occurring or a claim arising (x)
                prior to the Closing  Date or (y) after the Closing  Date in the
                case of claims in respect of products sold or services  provided
                by VSI or Seller prior to the Closing Date and  attributable  to
                acts  performed or omitted by VSI or Seller prior to the Closing
                Date,  provided,  however,  that  Buyer  shall  assume  any such
                liability  or  obligation  to the  extent  it has been  reserved
                against on the Closing Balance Sheet;

                         (iv) pursuant to existing loan  agreements  (other than
                payment  obligations assumed pursuant to Section 1.3 above), and
                all agreements executed in connection therewith;

                         (v) to any  present  or  former  shareholder,  officer,
                director  or  Employee  of VSI  or  Seller  (including,  without
                limitation,  for bonuses,  fringe benefits,  vacation or holiday
                pay,   wages  or  severance   pay,  but  excluding  any  accrued
                liabilities  specifically  assumed by Buyer  pursuant to Section
                1.3 above); or

                         (vi)  incurred  in  connection  with  the  negotiation,
                preparation,  execution or  performance of this Agreement or the
                transactions contemplated hereby.

         1.5 Stockholder Approval;  Voting.  Seller, acting through its board of
directors,  shall, unless there exists a Superior Takeover Proposal,  as soon as
practicable  after the date  hereof  (i) seek the  written  consent  of its sole
stockholder,  VSI,  approving this Agreement and all  transactions  contemplated
hereby. VSI, acting through its board of directors (the "Board"),  shall, unless
there exists a Superior Takeover Proposal, as soon as practicable after the date
hereof (i) seek to obtain the written  consent of  stockholders  owning not less
than that number of shares of VSI capital stock required under applicable law in
order to approve the transactions  contemplated hereby; (ii) recommend that such
stockholders  of VSI consent to the approval and adoption of this  Agreement and
all transactions  contemplated  hereby; (iii) distribute to its stockholders the
definitive  information  statement  materials  with  respect  to the sale of the
Assets  in  accordance  with  Regulation  14C  under  the  Exchange  Act,  other
applicable  federal  and  state  laws,  (the  "Proxy  Materials");  (iv) use its
reasonable  efforts to obtain the necessary  approvals by VSI's  stockholders of
this Agreement and all transactions  contemplated  hereby;  and (v) will, as the
sole stockholder of Seller,  consent in writing, with respect to all outstanding
shares of  capital  stock of  Seller,  to the  execution  and  delivery  of, and
consummation  of the  transactions  contemplated  by, this  Agreement by Seller.
Contemporaneously  herewith, each of Rollins Investment Fund and Rollins Holding
Company,  Inc.,  has  executed an  agreement  whereby each of them has agreed to
consent  in  writing,  with  respect  to all  shares  of  capital  stock  of VSI
respectively  beneficially  owned by them, to the execution and delivery of, and
consummation of the  transactions  contemplated by, this Agreement by VSI unless
there exists a Superior Takeover Proposal.

         1.6  Closing.  The  closing  of the  purchase  and  sale of the  Assets
provided  herein  (the  "Closing")  shall  occur (i) at the office of Haynes and
Boone,  LLP, 901 Main Street,  Suite 3100,  Dallas,  Texas 75202, at 10:00 a.m.,

<PAGE>
local time,  on January 5, 1999, or (ii) at such other time and place or on such
other date as VSI,  Seller and Buyer may  mutually  agree (such date and time of
Closing being herein referred to collectively as the "Closing Date"). Regardless
of the actual  Closing Date,  the Closing shall be deemed to have occurred as of
12:01 a.m. January 1, 1999.

         1.7 Delivery of Schedules and Exhibits.  Within twenty business days of
the date of this Agreement,  VSI and Seller shall deliver to Buyer all schedules
(other than Schedule 2.9, which shall be delivered within  twenty-five  business
days of the date of this  Agreement) and exhibits to this Agreement (the date of
delivery of the last such schedule or exhibit,  including  Schedule  2.9,  being
referred  to herein as the  "Delivery  Date"),  such  schedules  being  true and
correct in all  material  respects at and as of the  Delivery  Date  (except for
Schedules 1.1.1 and 1.3A,  which shall be true and correct at and as of June 30,
1998) (collectively,  the "Preliminary  Schedules").  The Preliminary  Schedules
shall be updated as required  pursuant to Section  1.3 hereof and  otherwise  as
necessary  so  as to be  true  and  correct  at  and  as  of  the  Closing  Date
(collectively,  as so updated, the "Closing  Schedules").  The Closing Schedules
shall be delivered in  accordance  with  Section 1.9 hereof;  provided  that any
objection  by Buyer to any of the  Closing  Schedules  delivered  not later than
fifteen  days prior to Closing  must be made by Buyer prior to Closing.  Each of
the  Preliminary  Schedules  and  the  Closing  Schedules  shall  be  in a  form
reasonably satisfactory to Buyer.

         1.8  Allocation of Purchase  Price.  The  consideration  given by Buyer
under this Agreement  (including  without limitation the payment of the Purchase
Price and the assumption of liabilities pursuant to Section 1.3 hereof) shall be
allocated  among the Assets in  accordance  with  section  1060 of the  Internal
Revenue Code of 1986, as amended,  and the  regulations  thereunder.  A schedule
setting forth such proposed allocations shall be prepared by Buyer and delivered
to Seller  within 120 days  following the Closing  Date.  The  allocation as set
forth on such  schedule  shall be  reasonably  determined  by Buyer and shall be
reasonably  satisfactory  to Seller.  Buyer,  VSI and Seller  agree to make such
allocation in filing their respective tax returns or declarations for applicable
United States income tax purposes.

         1.9 Closing Balance Sheet Adjustment

                         1.9.1 Within 45 days  following the Closing  Date,  VSI
                and Seller,  with the reasonable  assistance and  cooperation of
                Buyer (including use of employees of Buyer who were employees of
                Seller immediately prior to Closing at no cost to Seller), shall
                prepare and deliver to Buyer the Closing  Balance  Sheet and the
                Closing  Schedules.  The Closing  Balance  Sheet and the Closing
                Schedules  shall be  prepared  from the books and records of VSI

<PAGE>

               and Seller  concerning their respective  businesses in accordance
               with GAAP on a basis consistent with that used in the preparation
               of the balance sheet included in the Financial  Statements  dated
               June  30,  1998.  Buyer,  with  the  reasonable   assistance  and
               cooperation  of VSI and Seller,  shall have 30 days to review the
               Closing  Balance  Sheet and the Closing  Schedules  after receipt
               thereof from VSI and Seller.  On or before the expiration of such
               30-day  period,  Buyer shall  deliver to VSI and Seller a written
               statement accepting or objecting to the Closing Balance Sheet and
               the Closing  Schedules.  In the event that Buyer shall  object to
               the Closing  Balance Sheet,  the Closing  Schedules or both, such
               statement  shall  include  a  detailed   itemization  of  Buyer's
               objections and its reasons therefor. If no statement is delivered
               by Buyer to VSI and Seller within such 30-day period, Buyer shall
               be deemed to have  accepted  the  Closing  Balance  Sheet and the
               Closing Schedules.

                         1.9.2 In the event that Buyer  shall  timely  object to
                the Closing Balance Sheet,  Buyer, VSI and Seller shall promptly
                meet and in good  faith  attempt to resolve  such  objection  or
                objections.  Any of such  objections  which  cannot be  resolved
                between Buyer, VSI and Seller within 30 days following VSI's and
                Seller's  receipt of Buyer's  statement of  objections  shall be
                submitted to binding  arbitration  conducted by the  independent
                accounting  firm of Arthur Andersen LLP. In the event that Buyer
                shall  timely  object  to  any of the  Closing  Schedules,  such
                objection  shall be resolved in  accordance  with  Section  5.15
                hereof.

                         1.9.3 In the event that the net assets reflected on the
                Closing Balance Sheet,  after all of Buyer's  objections thereto
                shall  have been  resolved  in  accordance  with  Section  1.9.2
                hereof,  are greater or less than $5,353,593 (i.e. the amount of
                the net assets  reflected on the balance  sheet  included in the
                Financial  Statements  dated June 30, 1998),  then the amount of
                any such  excess or  deficiency  shall be paid to VSI and Seller
                (in  the  case  of  an  excess)  or  Buyer  (in  the  case  of a
                deficiency)  by  the  other  by  wire  transfer  of  immediately
                available United States funds within three business days of such
                resolution, receipt of Buyer's written acceptance of the Closing
                Balance  Sheet  or  expiration  of  Buyer's  30-day  period  for
                objection to the Closing Balance Sheet.

                           1.9.4 In  addition  to the net asset  adjustment  set
                forth in Section  1.9.3  hereof,  in the event that the  Closing
                Balance Sheet  reflects  assets which are not purchased by Buyer
                or  reflects  liabilities  which are not  assumed by Buyer,  the
                excess,  if any, of the aggregate amount of any such assets over
                the aggregate  amount of any such  liabilities  shall be paid to
                Buyer or, as the case may be, the  aggregate  amount of any such
                liabilities  over the aggregate  amount of any such assets shall
                be paid to VSI and Seller,  in either  case by wire  transfer of
                immediately  available United States funds within three business
                days  following  the  resolution  of Buyer's  objections  to the
                Closing  Balance Sheet referred in Section 1.9.3 above,  receipt
                of Buyer's  written  acceptance of the Closing  Balance Sheet or
                expiration  of  Buyer's  30-day  period  for  objections  to the
                Closing Balance Sheet.

<PAGE>

         2. Subject to  attachment  of the  Schedules as provided in Section 1.7
hereof,  VSI and Seller hereby  jointly and  severally  represent and warrant to
Buyer as follows  (Seller and VSI  reserving the right to attach at the Delivery
Date and update at and as of the  Closing  Date  Schedules  in addition to those
called for herein and to add references thereto in the following  warranties and
representations as appropriate):

         2.1 Existence; Good Standing; Corporate Authority; Compliance With Law.
Each of VSI and Seller (i) is a corporation duly incorporated,  validly existing
and in good standing under the laws of its jurisdiction of  incorporation;  (ii)
is duly licensed or qualified to do business as a foreign  corporation and is in
good standing under the laws of any other  jurisdictions  in which the character
of the properties  owned or leased by it therein or in which the  transaction of
its business makes such  qualification  necessary except where the failure to be
so qualified would not be material;  (iii) has all requisite corporate power and
authority to own its properties and carry on its business as now conducted; (iv)
is not in material default with respect to any Order of any Governmental Body or
arbitration  board; (v) is not in material violation of any Legal Requirement to
which it is subject;  and (vi) has obtained all material  licenses,  permits and
other  authorizations  and has taken all actions  required by applicable laws or
governmental regulations in connection with its business as now conducted.

         2.2 Authorization, Validity and Effect of Agreements

                         2.2.1 The execution and delivery of this  Agreement and
                all agreements and documents  contemplated  hereby by Seller and
                VSI,  and the  consummation  by each  of  Seller  and VSI of the
                transactions  contemplated  hereby, have been duly authorized by
                the Board and the board of directors  of Seller and,  except for
                the  approval of the  stockholders  of VSI and Seller,  no other
                corporate proceedings on the part of Seller or VSI are necessary
                to authorize  this Agreement and the  transactions  contemplated
                hereby.

                         2.2.2 This  Agreement  constitutes,  and all agreements
                and  documents  contemplated  hereby when executed and delivered
                pursuant  hereto for value received will  constitute,  the valid
                and legally binding obligations of Seller and VSI enforceable in
                accordance with their terms,  except that  enforceability may be
                limited by applicable  bankruptcy,  insolvency,  reorganization,
                fraudulent  transfer,   moratorium,   bulk  sales,   preference,
                equitable  subordination,  marshalling  or other similar laws of
                general  application  now or hereafter in effect relating to the
                enforcement of creditors'  rights  generally and except that the
                remedies of specific performance,  injunction and other forms of
                equitable   relief  are  subject  to  certain  tests  of  equity
                jurisdiction, equitable defenses and the discretion of the court
                before which any proceeding therefor may be brought.

<PAGE>

                         2.2.3 The execution  and delivery of this  Agreement by
                each of Seller  and VSI does not,  and the  consummation  of the
                transactions  contemplated hereby by each of Seller and VSI will
                not,  except as set forth in Schedule 2.2 hereof (which Schedule
                2.2 will include  reference to compliance with the HSR Act), (i)
                require  the   consent,   approval  or   authorization   of,  or
                declaration,  filing or registration with, any Governmental Body
                or any Third  Party;  (ii)  result in the  breach of any term or
                provision  of, or constitute a default  under,  or result in the
                acceleration  of or  entitle  any party to  accelerate  (whether
                after  the  giving  of  notice or the lapse of time or both) any
                obligation under, or result in the creation or imposition of any
                Encumbrance  upon  any part of the  property  of  Seller  or VSI
                pursuant to any  provision of, any Order,  indenture,  mortgage,
                lease, license,  lien, or other agreement or instrument to which
                VSI or Seller is a party or by which either of them is bound; or
                (iii)  violate or conflict  with any  provision of the bylaws or
                the Certificate of  Incorporation of VSI or Seller as amended to
                the date hereof.

               2.3 Capitalization and Ownership. The authorized capital stock of
          VSI consists  solely of (i)  12,000,000  shares of common  stock,  par
          value  $.01 per  share,  of  which  7,906,617  shares  and no more are
          presently  issued and  outstanding  and (ii) 55,000 shares of Series C
          preferred stock, par value $0.10 per share, of which 55,000 shares and
          no  more  are  presently  issued  and  outstanding.   All  issued  and
          outstanding  shares of capital stock of Seller are owned  beneficially
          and of record by VSI. All of such  capital  stock of VSI and of Seller
          has been duly  authorized  and  validly  issued  and is fully paid and
          nonassessable.  Except as set forth in Schedule 2.3B hereof, there are
          no outstanding rights, warrants, options, subscriptions, agreements or
          commitments  giving  anyone any right to require VSI or Seller to sell
          or issue,  or to require VSI or the  Stockholders to sell or otherwise
          transfer, any capital stock or other securities of VSI or Seller.

               2.4  Affiliated  Entities.  Neither VSI nor Seller owns,  nor has
          either of them owned since September 4, 1998,  directly or indirectly,
          a majority  or  controlling  interest in any  corporation  (other than
          VSI's  ownership  of Seller),  business  trust,  joint stock  company,
          partnership or other business  organization or association relating to
          the business operations of Seller.

               2.5  Jurisdictions;  Schedule 2.5. Schedule 2.5 hereof contains a
          list of all jurisdictions in which each of VSI and Seller is presently
          licensed or qualified to do business. To the best knowledge of VSI and
          Seller, VSI and Seller has each complied in all material respects with
          all applicable laws of each such jurisdiction and all applicable rules
          and  regulations of each regulatory  agency  therein.  Neither VSI nor
          Seller (i) has been denied  admission  to conduct any type of business
          in any jurisdiction in which it is not presently admitted as set forth
          in such Schedule 2.5,  (ii) has had its license or  qualifications  to
          conduct  business in any jurisdiction  revoked or suspended,  or (iii)
          has been involved in any  Proceeding to revoke or suspend a license or
          qualification.
<PAGE>

               2.6 Records.  Each of VSI and Seller shall have delivered or made
          available  to Buyer and its counsel on or prior to the  Delivery  Date
          true and complete copies of its respective  Certificate or Articles of
          Incorporation,  bylaws,  minutes  of all  meetings  of  directors  and
          shareholders  and  certificates  reflecting  all actions  taken by the
          directors or shareholders  without a meeting,  partnership  agreements
          and  certificates,  and  other  organizational  documents,  of VSI and
          Seller,  and such  documents  are in full force and effect on the date
          hereof.

               2.7 Bank  Accounts.  Schedule  2.7 hereof  sets forth the name of
          each  bank,  savings  institution  or other  Person  with which VSI or
          Seller has an account,  lockbox or safe  deposit box and the names and
          identification  of all Persons  authorized to drawn thereon or to have
          access thereto.

                2.8      Financial Statements.

                         2.8.1 Since June 30, 1996,  the filings  required to be
                made by each of VSI and Seller under the Securities Act of 1933,
                as amended (the  "Securities  Act"), or the Securities  Exchange
                Act of 1934, as amended (the  "Exchange  Act"),  have been filed
                with  the  SEC as  required  by  each  such  law or  regulation,
                including all forms,  statements,  reports,  agreements  and all
                documents,  exhibits,  amendments and  supplements  appertaining
                thereto,  and  each  of VSI  and  Seller  have  complied  in all
                material  respects  with  all  applicable  requirements  of  the
                appropriate act and the rules and regulations thereunder.

                         2.8.2 VSI and Seller shall have made available to Buyer
                on or prior to the  Delivery  Date a true and  complete  copy of
                each report,  schedule,  registration  statement and  definitive
                proxy  statement  filed by VSI or Seller with the Securities and
                Exchange  Commission  (the  "SEC")  since  June 30,  1996  (such
                documents as filed,  and any and all amendments  thereto,  being
                collectively referred to herein as the "SEC Reports").

                         2.8.3 The SEC Reports, including without limitation any
                financial  statements or schedules included therein, at the time
                filed,  and all forms,  reports or other documents filed by each
                of VSI and Seller  with the SEC after the date  hereof,  did not
                and will 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.

                         2.8.4 The audited consolidated financial statements and
                unaudited  interim  financial   statements  of  VSI  and  Seller
                included  in  the  SEC  Reports  (collectively,  the  "Financial
                Statements")  have been prepared,  and the audited  consolidated

<PAGE>
                financial  statements and unaudited interim financial statements
                of VSI and Seller as  included  in all  forms,  reports or other
                documents  filed  with the SEC  after  the date  hereof  will be
                prepared in  accordance  with GAAP  (except as may be  indicated
                therein  or in the notes  thereto  and  except  with  respect to
                unaudited  statements  as  permitted  by Form  10-Q) and  fairly
                present in all material  respects the financial  position of VSI
                and Seller as of the respective  dates thereof or the results of
                operations and cash flows for the respective periods then ended,
                as the  case  may be,  subject,  in the  case  of the  unaudited
                interim  financial  statements,   to  normal,   recurring  audit
                adjustments.

                         2.8.5 As soon as  reasonably  practical  following  the
                Closing Date, VSI and Seller (with the reasonable assistance and
                cooperation  of Buyer and employees of Buyer who were  employees
                of Seller immediately prior to Closing, such assistance to be at
                no cost to VSI or Seller) will cause to be prepared  each of the
                following  with  respect  to VSI  and  Seller,  as at and of the
                Closing  Date:  an  audited   consolidated  balance  sheet  (the
                "Closing Balance Sheet"), an audited  consolidated  statement of
                operations,  an audited consolidated statement of cash flows and
                an  audited  consolidated   statement  of  stockholders'  equity
                (collectively  with the  Closing  Balance  Sheet,  the  "Closing
                Financial Statements"),  which Closing Financial Statements will
                be prepared in accordance  with GAAP on a basis  consistent with
                the Financial Statements. In addition, the Closing Balance Sheet
                shall  be in the  form  of the  balance  sheet  included  in the
                Financial  Statements  dated June 30, 1998. One half of the fees
                paid to independent accounting firms incurred in connection with
                the audit and  preparation of the Closing  Financial  Statements
                shall be paid by VSI and Seller and the other half shall be paid
                by Buyer.

                    2.9 Undisclosed Liabilities.  Neither VSI nor Seller has any
               liabilities or obligations (whether absolute, accrued, contingent
               or otherwise)  of a nature  required by GAAP to be reflected in a
               consolidated  balance sheet, except  liabilities,  obligations or
               contingencies  (i) that are  accrued or  reserved  against in the
               audited  consolidated  financial  statements of VIS and Seller or
               reflected in the notes  thereto for the year ended June 30, 1998,
               (ii) have been accrued or been  reserved  against  since June 30,
               1998,  and are  disclosed  on  Schedule  2.9 or (iii)  that  were
               incurred after June 30, 1998, in the ordinary  course of business
               and would not have a material effect on VSI or Seller.



<PAGE>


               2.10 Absence of Certain  Changes of Events.  Since June 30, 1998,
          neither VSI nor Seller has:ts

                         (i) incurred  any  obligation  or  liability  (fixed or
                contingent),   except  normal  trade  or  business   obligations
                incurred in the ordinary  course of business and consistent with
                past practice,  none of which is materially adverse,  and except
                in  connection   with  this   Agreement  and  the   transactions
                contemplated hereby;

                         (ii)  discharged or satisfied any  Encumbrance  or paid
                any obligation or liability (fixed or contingent), other than in
                the  ordinary  course  of  business  and  consistent  with  past
                practice;

                         (iii)   mortgaged,   pledged   or   subjected   to  any
                Encumbrance any of its assets or properties (other than inchoate
                real  estate  tax  liens  not  due  and   payable,   mechanic's,
                materialman's   and  similar  statutory  liens  arising  in  the
                ordinary   course  of  business  and  purchase   money  security
                interests  arising  as a  matter  of law  between  the  date  of
                delivery and payment);

                         (iv) transferred,  leased or otherwise  disposed of any
                of its assets or properties  except for a fair  consideration in
                the  ordinary  course  of  business  and  consistent  with  past
                practice  or,  except in the  ordinary  course of  business  and
                consistent   with  past   practice,   acquired   any  assets  or
                properties;

                         (v) cancelled or compromised any debt or claim,  except
                in the  ordinary  course of business  and  consistent  with past
                practice;

                          (vi) waived or released any rights of material value;

                         (vii) except pursuant to those contracts  listed on the
                Schedules  hereof,  transferred  or granted any rights under any
                concessions,  leases, licenses, agreements, patents, inventions,
                trademarks,  trade names,  service  marks or  copyrights or with
                respect to any know-how;

                         (viii)  made or  granted  any wage or  salary  increase
                applicable   to  any  group  or   classification   of  Employees
                generally,  entered into any  employment  contract with, or made
                any loan to, or entered  into any  material  transaction  of any
                other  nature  with,  any  officer  or  Employee,  except in the
                ordinary  course  of  business  or as  listed  on the  Schedules
                hereof;

                         (ix)   entered  into  any   transaction,   contract  or
                commitment,  except (a) contracts listed on the Schedules hereof
                and (b) this Agreement and the transactions contemplated hereby;
                or

<PAGE>

                         (x) suffered any  casualty  loss or damage  (whether or
                not such loss or damage  shall have been  covered by  insurance)
                which  affects in any  material  respect  its ability to conduct
                business.

               2.11 Taxex.  Each of VSI and Seller (i) has duly and timely filed
          or caused to be filed  all  federal,  state,  local  and  foreign  tax
          returns (including,  without limitation,  consolidated and/or combined
          tax returns) required to be filed by it prior to the date hereof which
          relate to it or with  respect  to which it or the Assets are liable or
          otherwise in any way subject;  (ii) has paid or fully  accrued for all
          taxes shown to be due and payable on such returns (which taxes are all
          the taxes due and payable under the laws and  regulations  pursuant to
          which such returns were filed); and (iii) has properly accrued for all
          such  taxes  accrued  in  respect  of it or  the  Assets  for  periods
          subsequent to the periods  covered by such  returns.  No deficiency in
          payment of taxes for any period has been  asserted  by any taxing body
          and remains  unsettled at the date hereof and no audits are in process
          and no  notification  of audit to begin  has been  received  for which
          claims are unasserted.  The consolidated tax returns of VSI and Seller
          for tax year 1995 have been audited by the Internal  Revenue  Service.
          Copies of all federal,  state, local and foreign income (or franchise)
          tax returns of VSI and Seller for tax years 1996 and  thereafter  have
          been made available for inspection by Buyer.

               2.12 Real Property

                         2.12.1  Schedule  2.12A  hereof   identifies  the  real
                property  owned,  either in whole or in part, by each of VSI and
                Seller.

                         2.12.2  Schedule  2.12B  hereof   identifies  the  real
                property  leased or  subleased  by each of VSI and  Seller  (the
                "Leases").  Neither  VSI nor Seller  has  received  any  written
                notification  that it is in default  with  respect to any of the
                Leases nor are there any  disputes  between any landlord and VSI
                or Seller with respect to the Leases that would affect the right
                of VSI or Seller, as the case may be, to remain in possession or
                otherwise affect the current use of the property leased.  Except
                as set forth in Schedule  2.12B  hereof,  each of VSI and Seller
                has performed all material  obligations required to be performed
                by it to date under,  and is not in material  default in respect
                of, any Lease, and no event has occurred which,  with due notice
                or lapse  of time or  both,  would  constitute  such a  material
                default. To the best of each of VSI's and Seller's knowledge, no
                other  party to any  Lease is in  material  default  in  respect
                thereof,  and no event has  occurred  which,  with due notice or
                lapse of time or both, would constitute such a default.

                         2.12.3 True and  complete  copies of all Leases and all
                title  reports,  surveys and other  leases  relating to the real
                property  owned by VSI or Seller shall have been made  available
                to Buyer  or its  representatives  on or  prior to the  Delivery
                Date.
<PAGE>

               2.13 Personal  Property.  The  machinery,  equipment,  furniture,
          fixtures and other tangible personal property owned, leased or used by
          each of VSI and Seller are  sufficient  and adequate to carry on their
          respective businesses as presently conducted and are in good operating
          condition  and repair and are suitable for the purposes for which they
          are used, normal "wear and tear" excepted.

               2.14 Title to  Property;  Encumbrances.  Either VSI or Seller has
          good, valid and, in the case of real  properties,  marketable title to
          all the  properties  and assets shown on the  Financial  Statements or
          thereafter  acquired,  including the Assets  (except for (i) inventory
          subsequently  sold or  otherwise  disposed  of for  fair  value in the
          ordinary  course  of  business  consistent  with past  practice,  (ii)
          accounts receivable  subsequently  collected in the ordinary course of
          business consistent with past practice and (iii) immaterial amounts of
          inventory,  machinery  and equipment  that have been  determined to be
          obsolete or otherwise  not  necessary and have been disposed of in the
          ordinary course of business  consistent  with past practice),  in each
          case free and clear of all  Encumbrances  except  for any  Encumbrance
          reflected  in  Schedule  2.14  hereof.   All  buildings,   structures,
          improvements  and fixtures  owned,  leased or used by VSI or Seller in
          the conduct of their  respective  businesses  conform in all  material
          respects to all applicable  codes, and rules adopted by any applicable
          Governmental  Body or national  and local  associations  and boards of
          insurance   underwriters;   and  all   such   buildings,   structures,
          improvements and fixtures are in good operating  condition and repair,
          normal "wear and tear" excepted.

               2.15  Insurance.  Schedule 2.15 hereof sets forth a complete list
          of  all  policies  of  or  binders  for  fire,   liability,   worker's
          compensation and other forms of insurance owned or held by each of VSI
          and Seller. All such policies,  or binders thereof,  are in full force
          and effect,  all premiums with respect thereto covering all periods up
          to and  including  the  respective  dates set forth in  Schedule  2.15
          hereof have been paid,  and no notice of  cancellation  or termination
          has been  received  with  respect to any such  policy or binder.  Such
          policies  or  binders  (i) are  sufficient  for  compliance  with  all
          requirements of law currently applicable to each of VSI and Seller and
          of all  agreements  to which  each of VSI and  Seller is a party or by
          which  any of them is  bound;  (ii) are in such  amounts  and types of
          coverage as are  customarily  maintained by businesses of the size and
          type as VSI's and Seller's;  (iii) provide insurance coverage adequate
          for the Assets and present  operations  of VSI and  Seller;  (iv) will
          remain in full force and effect through the respective dates set forth
          in Schedule 2.15 hereof  without the payment of  additional  premiums;
          and (v) will not in any way be affected  by, or  terminate or lapse by
          reason of, the transactions  contemplated by this Agreement.  Schedule
          2.15 hereof also identifies all risks which each of VSI and Seller has
          designated  as being  self-insured.  Neither  VSI nor  Seller has been
          refused any insurance  with respect to its assets or  operations,  nor
          has its coverage  been limited,  by any insurance  carrier to which it
          has  applied  for any such  insurance  or with  which  it has  carried
          insurance during the last five years.

<PAGE>
               2.16 Business Property Rights

                         2.16.1 Schedule 2.16 hereof sets forth (i) all computer
                software,  patents,  and  registrations  for  trademarks,  trade
                names,  service marks and  copyrights  which are unexpired as of
                the  date  hereof  and  which  are used in  connection  with the
                operation of each of VSI's and Seller's business, as well as all
                applications  pending on said date for patents or for trademark,
                trade name,  service  mark or copyright  registrations,  and all
                other trade  secrets and  proprietary  rights,  owned or held by
                each of VSI and Seller and which are reasonably necessary to, or
                used in connection with, the business of each of VSI and Seller;
                and (ii) all licenses (other than shrink wrap licenses)  granted
                by or to VSI or Seller and all other  agreements to which VSI or
                Seller is a party and which relate,  in whole or in part, to any
                items of the  categories  mentioned in (i) above or to any trade
                secret or other  proprietary  rights of VSI or Seller  which are
                reasonably  necessary  to,  or  used  in  connection  with,  the
                business of VSI or Seller.

                         2.16.2  The  property  referred  to in  Section  2.16.1
                hereof,  together  with (i) all  designs,  methods,  inventions,
                know-how, related thereto and (ii) all trademarks,  trade names,
                service marks,  and copyrights  claimed or used by either VSI or
                Seller which have not been  registered  (collectively  "Business
                Property Rights"),  constitute all such proprietary rights owned
                or held  by  either  VSI or  Seller  and  which  are  reasonably
                necessary  to, or used in the conduct of the  business of either
                VSI or Seller.  All of those items  designated  as trade secrets
                and  all  related  designs,  methods,  inventions  and  know-how
                constitute  trade secrets of VSI or Seller within the meaning of
                all  applicable  laws,  and each of VSI and Seller has taken all
                necessary  steps  required by law to protect these trade secrets
                as  such.   With  respect  to  each  such  trade   secret,   the
                documentation   relating  to  such  trade   secret  is  current,
                accurate,  and  sufficient  in detail and content to identify it
                and to allow its full and proper use. No such trade  secrets are
                part of the public  knowledge or literature,  nor have they been
                used,  divulged,  or  appropriated  for the benefit of any Third
                Party or otherwise to the detriment of VSI or Seller.

                         2.16.3 Each of VSI and Seller, as the case may be, owns
                or has valid  rights to use all such  Business  Property  Rights
                without conflict with the rights of others.  Except as set forth
                in Schedule 2.21 hereof,  no Person or corporation  has made or,
                to the  knowledge of each of VSI and Seller,  Threatened to make
                any claims that the  operation  of the business of VSI or Seller
                is in violation of or infringes any other  proprietary  or trade
                rights of any Third Party.  To the  knowledge of each of VSI and
                Seller,  no Third Party is in violation of or is infringing upon
                any Business Property Rights.
<PAGE>

               2.17 There are no collective  bargaining  agreements which relate
          to either VSI or Seller or to which either VSI or Seller is a party or
          which cover one or more Employees.

 .       2.18    Employees

                         2.18.1  Schedule  2.18.  to this  Agreement  contains a
                complete and accurate list of the following information for each
                Employee,  including each Employee on leave of absence or layoff
                status:  (i) name; (ii) address;  (iii) telephone  number;  (iv)
                social security number; (v) date of birth; (vi) job title; (vii)
                date of hire;  (viii)  hourly  or  weekly  compensation  rate in
                effect on June 30, 1998,  and a comparison  of such rate to that
                in effect  on June 30,  1997;  (ix)  vacation  accrued;  and (x)
                service  credited  for  purposes of vesting and  eligibility  to
                participate  under  any  pension,  retirement,   profit-sharing,
                thrift-savings,   deferred  compensation,   stock  bonus,  stock
                option,   cash  bonus,   employee  stock  ownership   (including
                investment  credit or payroll stock  ownership),  severance pay,
                insurance,  medical,  welfare,  or vacation  plan,  or any other
                employee benefit plan. To the best of each of VSI's and Seller's
                knowledge,  during  the past four years  neither  VSI nor Seller
                has,  directly or indirectly,  purchased,  leased,  acquired any
                property  or  obtained  any  services  from,  or  sold,  leased,
                disposed  of any  property  or  furnished  any  services  to, or
                otherwise  dealt  with  any  Employee  or any  Person,  firm  or
                corporation  which,  directly or  indirectly,  alone or together
                with  others,  controls,  is  controlled  by or is under  common
                control with any Employee,  except with respect to  remuneration
                for services rendered as a director,  officer or employee of VSI
                or Seller.

                         2.18.2  To the  best  of  each of  VSI's  and  Seller's
                knowledge,  no part of the property or assets of any Employee or
                any Person,  individual or  organization  directly or indirectly
                related to any Employee is used by VSI or Seller.

                         2.18.3  Neither  VSI nor  Seller  has  encountered  any
                actual or threatened Employee strike, work stoppage, slowdown or
                lockout,  or had  any  material  change  in its  relations  with
                Employees,  agents,  customers or suppliers  for the three years
                prior  to the date of this  Agreement.  No  question  concerning
                representation  has been raised or is threatened with respect to
                the Employees.

                         2.18.4 No  "leased  employee",  as that term is defined
                within  the  meaning  of  Section  414(n) of the Code,  performs
                services for VSI or Seller other than temporary employees.
<PAGE>

                         2.18.5  Except as  disclosed  in Schedule  2.18 to this
                Agreement, the consummation of the transactions  contemplated by
                this  Agreement  will not (i)  entitle  any  current  or  former
                Employee  or current or former  officer  or  director  of VSI or
                Seller to severance pay, unemployment  compensation or any other
                payment,  except as expressly  provided in this Agreement;  (ii)
                accelerate  the time or  payment or  vesting,  or  increase  the
                amount  of  compensation  due  any  such  Employee,  officer  or
                director;   or  (iii)  result  in  any  prohibited   transaction
                described  in Section  406 of ERISA or Section  4975 of the Code
                for which an exemption is not available.

                         2.18.6  Each of VSI and  Seller  is  currently  and has
                always been in  compliance  in all  material  respects  with all
                applicable laws respecting  employment and employment practices,
                terms and  conditions of wages and hours,  and is not engaged in
                any unfair labor practice.

                         2.18.7  Neither VSI nor Seller (i) has taken any action
                which,  alone or in conjunction with actions committed by VSI or
                Seller  prior to the  Closing  Date to be  taken in the  future,
                would  constitute a "plant  closing" or "mass layoff" within the
                meaning of the Worker Adjustment and Retraining Notification Act
                ("WARN")  or  applicable  state  law;  or (ii)  has  issued  any
                notification of a "plant  closing" or "mass layoff"  required by
                WARN or by applicable state law.

               2.19  Other  Contracts.  Schedule  2.19  hereof  sets  forth  all
          contracts,   understandings   and  commitments   (including,   without
          limitation, mortgages, indentures and loan agreements) to which either
          VSI or Seller is a party,  or to which  either of them or any of their
          respective  assets  or  properties  are  subject,  and  which  are not
          specifically  referred  to in the other  Schedules  hereof  other than
          those which are exempted by the terms of Section  1.3(ii)  hereof from
          being  listed  on  Schedule  1.3B.  True and  complete  copies  of all
          documents and complete  descriptions  of all oral  understandings,  if
          any,  referred to in the Schedules  will be provided or made available
          to Buyer and its counsel on or prior to the Delivery Date.

               2.20 No Breach or Default.  Neither VSI nor Seller is in material
          default  under any  contract  to which it is a party or by which it is
          bound, nor has any event occurred which, after the giving of notice or
          the passage of time or both, would constitute a material default under
          any such  contract.  Neither  VSI nor Seller has any reason to believe
          that the parties to such contracts will not fulfill their  obligations
          under such contracts in all material  respects or are threatened  with
          insolvency.



<PAGE>


               2.21 Litigation

                         2.21.1  Schedule  2.21  hereof  sets forth a list and a
                summary description of all pending or Threatened  Proceedings in
                respect of each of VSI and Seller,  setting forth,  with respect
                to each action or suit,  (i) the reserves  reflected in the most
                recent Financial Statements and (ii) the existence and extent of
                insurance coverage.

                         2.21.2  Except as set forth in  Schedule  2.21  hereof,
                there are no claims or Proceedings  pending or Threatened before
                any  Governmental  Body or before any  arbitrator of any nature,
                brought by or against  VSI or Seller or any of their  respective
                officers, directors,  Employees, agents or affiliates involving,
                affecting or relating to any assets, properties or operations of
                VSI  or  Seller  or  the   transactions   contemplated  by  this
                Agreement,  nor does there exist any fact which might reasonably
                be expected to give rise to any such suit,  Proceeding,  dispute
                or investigation.

                         2.21.3   Neither  VSI  nor  Seller  nor  any  of  their
                respective  assets or  properties is subject to any Order of any
                Governmental  Body or  arbitrator,  which  adversely  affects or
                might reasonably be expected to affect their respective  assets,
                properties,   business  operation,   prospects,  net  income  or
                financial  condition  or  which  would or  might  reasonably  be
                expected to interfere with the transactions contemplated hereby.

                         2.21.4  Other than as  provided  in  Section  1.4(iii),
                Buyer is not assuming any  liabilities  or obligations of VSI or
                Seller set forth on Schedule 2.21.  Schedule 2.21 is provided to
                Buyer solely for informational  purposes.  Buyer does,  however,
                agree to cooperate,  at Seller's  expense,  with the  reasonable
                requests of Seller to make available certain witnesses and other
                evidence  during  the  pendency  of the  matters  set  forth  in
                Schedule 2.21.

               2.22 Accounts  Receivable.  All trade accounts receivable of each
          of VSI and Seller reflected in the Financial  Statements and all trade
          accounts receivable of each of VSI and Seller arising between June 30,
          1998 and the  Closing  Date  have  arisen  in the  ordinary  course of
          business and represent bona fide, undisputed  indebtedness (subject to
          no counterclaim,  right of setoff or warranty claim other than as will
          be reserved  against in the  Closing  Balance  Sheet)  incurred by the
          applicable   account   debtor  for  goods  held  subject  to  delivery
          instructions or shipped or delivered pursuant to a contract of sale or
          for  services  performed  by VSI or  Seller.  

               2.23  Inventories and Supplies.  The  inventories and supplies of
          each of VSI and  Seller  reflected  in the  Financial  Statements,  or
          acquired by VSI or Seller  between June 30, 1998, and the date hereof,
          are  carried  at not in  excess  of the  lower of cost or fair  market
          value,  and do not  include  any  inventory  which  is not  usable  or
          saleable  in the  ordinary  course of  business  of VSI and  Seller as
          heretofore  conducted,  in each case net of reserves provided therefor
          in such Financial Statements in accordance with GAAP.
<PAGE>

               2.24 Environmental Matters.  Except as set forth in Schedule 2.24
          hereof,

                         2.24.1 Each of VSI and Seller is in compliance with and
                neither is liable under any  Environmental  Law. Neither VSI nor
                Seller  has  received  any  Order  or  written  notice  from any
                Governmental  Body or other Person  alleging any violation of or
                failure to comply with any  Environmental  Law, or any actual or
                Threatened  obligation  to  undertake  or bear  the  cost of any
                Environmental Liabilities with respect to any of the Facilities,
                or with respect to any property at, to, or from which  Hazardous
                Materials were generated,  manufactured,  refined,  transferred,
                imported,   used,  processed,   transported,   treated,  stored,
                handled, disposed, recycled, or received by VSI or Seller or any
                of their respective Employees.

                         2.24.2   There  are  no  Claims   resulting   from  any
                Environmental  Liabilities  that have been asserted with respect
                to or  affecting  any  of  the  Facilities  or  that  relate  to
                ownership or operation by VSI or Seller.

                         2.24.3 There are no Hazardous  Materials  present on or
                in the  Environment at the  Facilities,  including any Hazardous
                Materials  contained in barrels,  above or  underground  storage
                tanks,  landfills,  land  deposits,  dumps,  equipment  (whether
                moveable  or fixed) or other  containers,  either  temporary  or
                permanent,  and deposited or located in land,  water,  sumps, or
                any  other  part of the  Facilities,  or  incorporated  into any
                structure   therein  or  thereon   except  in  compliance   with
                Environmental  Laws and with regard to which no remedial  action
                would be required if brought to the attention of a  Governmental
                Body with jurisdiction.

                         2.24.4  Either  VSI or  Seller  has  delivered  or made
                available to Buyer true and  complete  copies and results of any
                reports,  studies,  analyses,  tests, or monitoring possessed by
                VSI or Seller  pertaining  to  Hazardous  Materials  in,  on, or
                under, or to Environmental issues relating to, the Facilities or
                Former Facilities.

               2.25  Customers  and  Suppliers.  Except as set forth in Schedule
          2.25 hereof,

                         (i) neither VSI nor Seller has  received  notice  that,
                nor does VSI or Seller have any knowledge  that, any customer of
                VSI or Seller has, will or plans to  discontinue  doing business
                with VSI or Seller;
<PAGE>
                         (ii)  neither  VSI  nor  Seller  has  any   outstanding
                purchase contracts or commitments or unaccepted  purchase orders
                which  are  in  excess  of  the  normal,   ordinary   and  usual
                requirements;

                         (iii) no supplier or subcontractor to VSI or Seller has
                reduced  its  shipments  of orders  issued by VSI or Seller,  or
                threatened to  discontinue,  supplying such items or services to
                VSI or Seller on reasonable terms; and

                         (iv) neither VSI nor Seller has  received  notice that,
                nor  does  VSI nor  Seller  have any  knowledge  that,  any such
                supplier  or  subcontractor  has,  will or plans to  discontinue
                doing  business  with VSI or  Seller on  substantially  the same
                terms as are consistent with its past practices.

               2.26 No  Brokers.  Neither  VSI nor Seller has  entered  into any
          contract,  arrangement or understanding  with any Person or firm which
          may  result  in the  obligation  of  Buyer,  VSI or  Seller to pay any
          finder's fees, brokerage or agent's commissions or other like payments
          in connection with the  negotiations  leading to this Agreement or the
          consummation of the transactions  contemplated hereby, and neither VSI
          nor Seller is aware of any claim or basis for any claim for payment of
          any  finder's  fees,  brokerage or agent's  commissions  or other like
          payments in connection with the negotiations leading to this Agreement
          or the consummation of the transactions contemplated hereby.

               2.27  Indemnities  and  Guaranties.  Neither  VSI nor  Seller has
          indemnified  or  provided a guaranty  to any Person  except (i) as set
          forth and  described in Schedule  1.3B hereof and (ii) to customers of
          either in the ordinary course of business.

               2.28 No  Misrepresentation  or  Omission.  No  representation  or
          warranty by VSI or Seller in this Section 2 or in any other Section of
          this Agreement,  or in any certificate or other document  furnished or
          to be furnished  by VSI or Seller  pursuant  hereto,  contains or will
          contain any untrue  statement of a material fact or omits or will omit
          to state a material fact  necessary to make the  statements  contained
          therein not misleading or will omit to state a material fact necessary
          in order to provide  Buyer  with  accurate  information  as to VSI and
          Seller.

               2.29   Survival   of   Representations   and   Warranties.    All
          representations  and  warranties  by each of VSI  and  Seller  in this
          Section 2 or in any other Section  hereof,  or in any  certificate  or
          other document  furnished or to be furnished by VSI or Seller pursuant
          hereto,  shall survive  delivery by Buyer of the  consideration  to be
          given by it  hereunder  and  delivery by each of VSI and Seller of the
          consideration  to be given by each  hereunder,  and shall  survive the
          execution  hereof,   the  Closing  hereunder  and  the  Closing  Date;
          provided,  however,  that no  claim  based on any  breach  of any such
          warranty or any  misrepresentation may be made by any Buyer Indemnitee
          unless written  notice with respect  thereto is given on or before the
          third anniversary of the Closing Date.
<PAGE>

     3.  Representations  and  Warranties of Buyer Buyer hereby  represents  and
warrants to Seller and VSI as follows  (Buyer  reserving  the right to attach at
the Delivery Date and update at and as of the Closing Date Schedules in addition
to those  called  for  herein and to add  references  thereto  in the  following
warranties and representations as appropriate):

          3.1 Existence;  Good Standing;  Corporate  Authority;  Compliance With
     Law. Buyer (i) is a corporation duly incorporated, validly existing in good
     standing under the laws of its jurisdiction of incorporation;  (ii) is duly
     licensed or  qualified  to do business as a foreign  corporation  and is in
     good  standing  under  the laws of all  other  jurisdictions  in which  the
     character of the  properties  owned or leased by it therein or in which the
     transaction of its business makes such qualification necessary except where
     the  failure  to be so  qualified  would  not be  material;  (iii)  has all
     requisite  corporate power and authority to own its properties and carry on
     its business as now conducted; (iv) is not in material default with respect
     to any Order of any Governmental  Body or arbitration  board to which Buyer
     is a party or is  subject;  (v) is not in material  violation  of any laws,
     ordinances,  governmental rules or regulations to which it is subject;  and
     (vi) has obtained all material licenses,  permits and other  authorizations
     and has taken all  actions  required  by  applicable  laws or  governmental
     regulations in connection with its business as now conducted.

                3.2      Authorization, Validity and Effect of Agreements.

                         3.2.1 The execution and delivery of this  Agreement and
                all agreements and documents  contemplated  hereby by Buyer, and
                the consummation by it of the transactions  contemplated hereby,
                have been duly authorized by all requisite corporate action.

                         3.2.2 This  Agreement  constitutes,  and all agreements
                and  documents  contemplated  hereby when executed and delivered
                pursuant  hereto for value received will  constitute,  the valid
                and  legally  binding   obligations  of  Buyer   enforceable  in
                accordance with their terms,  except that  enforceability may be
                limited by applicable  bankruptcy,  insolvency,  reorganization,
                fraudulent  transfer,   moratorium,   bulk  sales,   preference,
                equitable  subordination,  marshalling  or other similar laws of
                general  application  now or hereafter in effect relating to the
                enforcement of creditors'  rights  generally and except that the
                remedies of specific performance,  injunction and other forms of
                equitable   relief  are  subject  to  certain  tests  of  equity
                jurisdiction, equitable defenses and the discretion of the court
                before which any proceeding therefor may be brought.
<PAGE>
                         3.2.3 The execution  and delivery of this  Agreement by
                Buyer  does  not,  and  the  consummation  of  the  transactions
                contemplated  hereby  will  not,  (i)  except  as set  forth  on
                Schedule   3.2  hereof,   require  the   consent,   approval  or
                authorization of, or declaration,  filing or registration  with,
                any  Governmental  Body or any Third  Party,  (ii) result in the
                breach  of any term or  provision  of, or  constitute  a default
                under, or result in the  acceleration of or entitle any party to
                accelerate  (whether  after the giving of notice or the lapse of
                time or both) any obligation under, or result in the creation or
                imposition of any  Encumbrance  upon any part of the property of
                Buyer  pursuant  to any  provision  of,  any  Order,  indenture,
                mortgage, lease, license, lien, or other agreement or instrument
                to which  Buyer is a party or by which it is  bound,  and  (iii)
                violate  or  conflict  with  any  provision  of  the  bylaws  or
                Certificate  of  Incorporation  of Buyer as  amended to the date
                hereof.

          3.3 Survival of Representations  and Warranties.  All  representations
     and  warranties by Buyer in this Section 3 or in any other Section  hereof,
     or in any  certificate  or other  document  furnished or to be furnished by
     Buyer pursuant hereto, shall survive delivery by Buyer of the consideration
     to be given by it  hereunder  and delivery by each of VSI and Seller of the
     consideration  to be  given  by  each  hereunder,  and  shall  survive  the
     execution  hereof,  the Closing  hereunder and the Closing Date;  provided,
     however,  that,  other than as set forth in Section  4.2  hereof,  no claim
     based on any breach of any such  warranty or any  misrepresentation  may be
     made by VSI or Seller unless written  notice with respect  thereto is given
     on or before the third anniversary of the Closing Date.

 .       4.      Indemnification

          4.1  Indemnification  by Seller and VSI.  Subject to the provisions of
     Section  5.15 below and upon the terms and  subject to the  conditions  set
     forth in Sections 4.3 and 4.5 hereof and this Section 4.1,  Seller and VSI,
     jointly and severally,  agree to indemnify,  defend, protect, save and hold
     harmless the Buyer Indemnitees (or any Buyer Indemnitee)  against, and will
     reimburse the Buyer  Indemnitees (or any Buyer Indemnitee) for, any and all
     Losses made or incurred by or asserted  against the Buyer  Indemnitees  (or
     any Buyer  Indemnitee),  at any time after the  Closing  Date,  directly or
     indirectly, arising out of, related to, caused by, or resulting from any of
     the following (in each case regardless of by whom asserted):

                         4.1.1 any and all  liabilities or obligations of Seller
                or VSI or claims against or imposed on the Buyer Indemnitees (or
                any  Buyer  Indemnitee),  of  any  nature,  including,   without
                limitation, those relating to the respective business activities
                of  Seller  or  VSI  or to  conditions  existing  on  any of the
                Facilities prior to the Closing Date (whether accrued, absolute,
                contingent  or  otherwise  and  whether  a   contractual,   tax,
                statutory or other type of  liability,  obligation or claim) not
                specifically   assumed  by  Buyer  pursuant  hereto  (including,
                without  limitation,  those liabilities or obligations of VSI or
                Seller specifically referred to in Section 1.4 hereof);
<PAGE>
                         4.1.2  any  inaccuracy,  omission,   misrepresentation,
                breach of warranty or  representation,  or nonfulfillment of any
                term, provision,  covenant or agreement on the part of Seller or
                VSI contained herein, or any inaccuracy or misrepresentation in,
                or omission from, any certificate or other instrument  furnished
                or to be furnished by Seller or VSI to Buyer pursuant hereto;

                         4.1.3 Seller's or VSI's failure to comply with any bulk
                transfer  provisions  which  may be in  effect  in the  state or
                states in which the Assets are located;

                         4.1.4 (i) any  Breach by Seller or VSI of  Seller's  or
                VSI's   environmental   representation  and  warranty  contained
                herein;  (this indemnity is intended to allocate  responsibility
                between VSI, Seller and Buyer and any other Indemnified Party as
                contemplated by Section 107(e)(1) of CERCLA or similar law);

                         4.1.5  any  and  all  items  listed  on  the  Schedules
                delivered  subsequent  to the Closing,  objected to by Buyer and
                determined  in  accordance  with  Section  5.15 hereof not to be
                items assumed by Buyer pursuant hereto.

                As used herein,  the term "Losses"  shall mean,  with respect to
        any Person or party, any payment,  loss, liability,  obligation,  damage
        (including,  without  limitation,  consequential,  punitive,  special or
        otherwise),  deficiency,  lien, claim, suit, cause of action,  judgment,
        cost or expense (including,  without limitation,  reasonable  attorneys'
        fees and  court  costs  and  costs  of  cleanup,  containment,  or other
        remediation of the Environment) of any kind, nature or description.

         As used herein,  the term "Buyer  Indemnitees" shall mean Buyer and any
affiliate of Buyer;

                As used herein, the term "affiliate" shall mean, with respect to
        any Person or party, (i) any Person or party controlling,  controlled by
        or  under  common  control  with any  such  Person  or party or (ii) any
        director  or  executive  officer  of any such  Person or party or of any
        Person or party  referred  to in clause (i) of this  paragraph.  As used
        herein,  the term  "control"  shall  mean the  possession,  directly  or
        indirectly,  of the  power to  direct  or  cause  the  direction  of the
        management  and  policies  of a Person or  party,  whether  through  the
        ownership  of voting  securities  or voting  interests,  by  contract or
        otherwise.

<PAGE>
               Notwithstanding  anything to the contrary  contained herein,  the
          parties  agree that any Buyer  Indemnitee's  sole remedy for any claim
          for damages  (excluding  equitable  remedies and those  resulting from
          fraud) arising under this  Agreement  (including the Schedules) or any
          other  agreement  between  Buyer  and VSI or  Seller  entered  into in
          connection   herewith   (including   any  claim  based  upon  Seller's
          warranties,  representations  and covenants contained herein) shall be
          limited to the remedies provided in the indemnification  provisions of
          this  Section 4 and the Escrow  Agreement.  Further,  Buyer waives all
          other  statutory or common law rights to recover against VSI or Seller
          for any matter relating to Environmental Contamination,  Environmental
          Liabilities  or  Hazardous  Materials.  There  shall  be no  limit  on
          Seller's or VSI's  obligation to indemnify and hold harmless any Buyer
          Indemnitee from or against Losses resulting from fraud.

               4.2  Indemnification  by Buyer. Upon the terms and subject to the
          conditions set forth in Section 4.3 hereof and this Section 4.2, Buyer
          agrees to indemnify,  defend,  protect,  save and hold harmless Seller
          and VSI against,  and will reimburse Seller and VSI on demand for, any
          and all Losses made or incurred by or asserted against Seller,  at any
          time after the Closing Date,  directly or indirectly,  arising out of,
          related to, caused by, or resulting from (i) any inaccuracy, omission,
          misrepresentation,  breach of warranty, or nonfulfillment of any term,
          provision,  covenant  or  agreement  on the  part of  Buyer  contained
          herein, (ii) any inaccuracy or misrepresentation in, or omission from,
          any  certificate or other  instrument  furnished or to be furnished by
          Buyer to  Seller  pursuant  hereto  or  (iii)  operation  of  business
          activities  of Buyer  after the  Closing  Date  involving  the Assets.
          Within 45 days  following the first  anniversary  of the Closing Date,
          Buyer  shall  deliver  to  VSI  and  Seller  a  certificate  of  Buyer
          certifying which of those liabilities and obligations of Buyer assumed
          from VSI or Seller  pursuant to this  Agreement and listed on Schedule
          1.3A or Schedule  1.3B (each as updated to Closing) had become due and
          payable  but had not been  paid in full or  resolved  as of the  first
          anniversary of the Closing Date.  With respect to the  liabilities and
          obligations  listed in such  certificate  (or which  were  erroneously
          omitted from such certificate),  Buyer's obligations  pursuant to this
          Section 4.2 shall  terminate  upon the payment or  resolution  of such
          liability  or  obligation.  With  respect  to  those  liabilities  and
          obligations  of Buyer  assumed  from VSI or  Seller  pursuant  to this
          Agreement  and  listed on  Schedule  1.3A or  Schedule  1.3B  (each as
          updated  to  Closing)  which by their  respective  terms in  effect at
          Closing will become due and payable  later than the first  anniversary
          of the Closing Date, Buyer's obligations  pursuant to this Section 4.2
          shall  terminate  upon the payment or resolution of such  liability or
          obligation.  In the event the  certificate  is not  timely  delivered,
          Buyer's  obligation  pursuant to this Section 4.2 shall terminate upon
          the  payment or  resolution  of all  liabilities  assumed  pursuant to
          Section 1.3. With respect to all other  liabilities and obligations of
          Buyer assumed from VSI or Seller pursuant to this  Agreement,  Buyer's
          obligations  pursuant  to this  Section 4.2 shall  terminate  upon the
          third  anniversary  of the  Closing  Date.  There shall be no limit on
          Buyer's  obligation to indemnify and hold harmless Seller and VSI from
          or against Losses resulting from fraud.
<PAGE>
               4.3 Conditions of Indemnification.  With respect to any actual or
          potential claim,  any written demand,  the commencement of any action,
          or the  occurrence  of any other  event which  involves  any matter or
          related series of matters (a "Claim")  against which a party hereto is
          indemnified  (the  "Indemnified   Party")  by  any  other  party  (the
          "Indemnifying Party") under Section 4.1 or 4.2 hereof:

                         4.3.1  Promptly  after  the  Indemnified   Party  first
                receives written  documents  pertaining to the Claim, or if such
                Claim  does not  involve a Third  Party  Claim (a  "Third  Party
                Claim"),  promptly after the Indemnified  Party first has actual
                knowledge of such Claim, the Indemnified Party shall give notice
                to the Indemnifying Party of such Claim in reasonable detail and
                stating the amount involved,  if known,  together with copies of
                any such written documents.

                         4.3.2  The  obligation  of the  Indemnifying  Party  to
                indemnify the Indemnified  Party with respect to any Claim shall
                not be affected by the failure of the Indemnified  Party to give
                the notice with respect thereto in accordance with Section 4.3.1
                hereof unless the Indemnifying Party shall establish that it has
                been materially prejudiced thereby.

                         4.3.3 If the Claim  involves a Third Party Claim,  then
                the  Indemnifying  Party  shall,  at its sole cost,  expense and
                ultimate  liability  regardless  of  the  outcome,  and  through
                counsel  of  its  choice  (which  counsel  shall  be  reasonably
                satisfactory to the Indemnified Party), litigate, defend, settle
                or  otherwise   attempt  to  resolve  such  Third  Party  Claim;
                provided, however, that if in the Indemnified Party's reasonable
                judgment a conflict  of interest  may exist with  respect to the
                Third Party Claim,  then the Indemnified Party shall be entitled
                to select counsel of its own choosing,  reasonably  satisfactory
                to the Indemnifying Party, in which event the Indemnifying Party
                shall be obligated to pay the fees and expenses of such counsel.
                Notwithstanding  the preceding  sentence,  the Indemnified Party
                may elect, at any time and at the Indemnified Party's sole cost,
                expense and ultimate  liability,  regardless  of the outcome (in
                the case of reasons other than the Indemnifying  Party's failure
                or refusal to provide a defense to such Third Party Claim),  and
                through counsel of its choice,  to litigate,  defend,  settle or
                otherwise  attempt to resolve  such Third  Party  Claim.  If the
                Indemnified   Party  so  elects  (for  reasons  other  than  the
                Indemnifying  Party's failure or refusal to provide a defense to
                such Third Party Claim),  then the Indemnifying Party shall have
                no obligation to indemnify the Indemnified Party with respect to
                such Third Party  Claim,  but such  disposition  will be without
                prejudice to any other right the  Indemnified  Party may have to
                indemnification  under Section 4.1 or 4.2 hereof,  regardless of
                the outcome of such Third Party Claim. If the Indemnifying Party
                fails or refuses to provide a defense to any Third Party  Claim,

<PAGE>
                then the Indemnified Party shall have the right to undertake the
                defense,  compromise  or  settlement  of such Third Party Claim,
                through counsel of its choice,  on behalf of and for the account
                and at the risk of the Indemnifying  Party, and the Indemnifying
                Party  shall  be  obligated  to  pay  the  costs,  expenses  and
                attorney's fees incurred by the Indemnified  Party in connection
                with such Third Party Claim. In any event,  Seller and the Buyer
                Indemnitees  shall  fully  cooperate  with each  other and their
                respective  counsel  in  connection  with any  such  litigation,
                defense, settlement or other attempted resolution.

                4.4      Monetary Limits of Indemnification

                         4.4.1  Notwithstanding  the  provisions  of Section 4.1
                hereof,  Seller and VSI will not be  obligated  to  indemnify or
                hold  harmless  any  Buyer  Indemnitee  from or  against  Losses
                arising out of or resulting  from  matters  described in Section
                4.1, (other than Losses  directly or indirectly  arising out of,
                related  to,  caused  by,  or  resulting  from  any  inaccuracy,
                omission  or  misrepresentation   contained  in,  or  breach  of
                warranty or representation respecting,  Section 2.22), until the
                amount of such Losses  individually  or in the aggregate  exceed
                the amount of $200,000 (the "Floor Amount"), it being understood
                and agreed  that the Floor  Amount  shall be deemed to have been
                reached as to each of VSI and Seller when Buyer's  Losses exceed
                the amount of $200,000.  Upon reaching the Floor Amount,  Seller
                and VSI shall be  required to  indemnify  the  applicable  Buyer
                Indemnitee for Losses comprising the Floor Amount as well as all
                Losses  occurring  thereafter only from the Escrow Fund and only
                up to (except in the cases of Losses  resulting  from  fraud) an
                aggregate  amount  equal to the amount of the  Escrow  Fund then
                outstanding (the "Seller's Ceiling Amount"). Seller and VSI will
                be obligated to indemnify and hold harmless any Buyer Indemnitee
                from or against  Losses  directly or indirectly  arising out of,
                related  to,  caused  by,  or  resulting  from  any  inaccuracy,
                omission  or  misrepresentation   contained  in,  or  breach  of
                warranty or  representation  respecting,  Section 2.22 up to the
                Seller's  Ceiling  Amount  without  regard to the Floor  Amount.
                Seller and VSI will be obligated to indemnify  and hold harmless
                any  Buyer   Indemnitee  from  or  against  Losses  directly  or
                indirectly  arising out of,  related to, caused by, or resulting
                from any inaccuracy, omission or misrepresentation contained in,
                or breach of warranty  or  representation  respecting,  Sections
                2.12.2  or  2.20  without  regard  to the  materiality  of  such
                inaccuracy, omission,  misrepresentation,  or breach of warranty
                or representation. Notwithstanding the provisions of Section 4.1
                hereof and except in the cases of Losses  resulting  from fraud,
                Seller  and VSI  will  not be  obligated  to  indemnify  or hold
                harmless  any Buyer  Indemnitee  from or  against  Losses to the
                extent such Losses are in excess of the Seller's Ceiling Amount.
                There shall be no monetary limit on Seller's or VSI's obligation
                to  indemnify  and hold  harmless any Buyer  Indemnitee  from or
                against Losses resulting from fraud.

<PAGE>
                         4.4.2  Notwithstanding  the  provisions  of Section 4.2
                hereof,  Buyer  will  not be  obligated  to  indemnify  or  hold
                harmless  Seller or VSI from or against Losses arising out of or
                resulting  from matters  described  in Section 4.2,  (other than
                Losses directly or indirectly arising out of, related to, caused
                by, or resulting from any  nonfulfillment of any covenant on the
                part of Buyer contained in Section 1.3 hereof or any certificate
                related thereto),  until the amount of such Losses  individually
                or in the aggregate  exceed the Floor Amount.  Upon reaching the
                Floor  Amount,  Buyer shall be required to indemnify  Seller and
                VSI for Losses comprising the Floor Amount as well as all Losses
                occurring  thereafter  only up to (except in the cases of Losses
                resulting  from fraud) an aggregate  amount equal to $12,000,000
                (the  "Buyer's  Ceiling  Amount").  Buyer will be  obligated  to
                indemnify  and hold  harmless  Seller  and VSI  from or  against
                Losses directly or indirectly arising out of, related to, caused
                by, or resulting from any  nonfulfillment of any covenant on the
                part of Buyer  contained in Section 1.3 hereof up to the Buyer's
                Ceiling   Amount   without   regard   to   the   Floor   Amount.
                Notwithstanding  the provisions of Section 4.2 hereof and except
                in the cases of Losses  resulting from fraud,  Buyer will not be
                obligated to indemnify  or hold  harmless  Seller or VSI from or
                against  Losses to the extent  such  Losses are in excess of the
                Buyer's  Ceiling  Amount.  There shall be no  monetary  limit on
                Buyer's  obligation to indemnify and hold harmless Seller or VSI
                from or against Losses resulting from fraud.

                4.5      Environmental Remediation

                         4.5.1.  The term  "Environmental  Contamination"  shall
                mean  the  presence  of  Hazardous   Materials  at  any  of  the
                Facilities.  Environmental  Contamination  is indemnifiable as a
                Loss under Section 4.1 hereof if it has resulted in the issuance
                of  a  final  Order  or  legally  enforceable   directive  by  a
                Governmental  Body or if it  triggers a Legal  Requirement  that
                imposes  an  obligation  to act,  or, for  Facilities  on leased
                property,  when  brought to the  attention  of the landlord as a
                result of a legal  requirement or a requirement  under the lease
                to so  notify,  results in a legally  enforceable  demand by the
                landlord for remediation.

<PAGE>       
                       4.5.2  The  addressing of  Environmental  Contamination,
                (whether   by   assessment,   negotiation,    compromise,   risk
                assessment,  cleanup  or  otherwise)  (hereafter  "Environmental
                Remediation")  identified  by the  Environmental  Due  Diligence
                Review shall be  performed by VSI and Seller,  to the extent the
                cost of the Environmental Remediation of such contamination does
                not exceed the funds  available in the Escrow Fund.  If and when
                funds from the Escrow fund are  exhausted,  VSI and Seller shall
                have no obligation to perform any  Environmental  Remediation or
                otherwise   address   any   Environmental   Contamination.   The
                remediation of Environmental  Contamination identified after the
                Closing  shall be the  responsibility  of Buyer unless Buyer can
                establish  that such  contamination  arose prior to the Closing.
                Buyer  acknowledges that VSI and Seller shall have no obligation
                to  perform   Environmental   Remediation  unless  Environmental
                Contamination  is discovered  (i) during the  Environmental  Due
                Diligence review set forth in Section 5.5.2; or (ii) by, or as a
                result of a third party claim or demand; or (iii) due to a Legal
                Requirement under any  Environmental  Law.  Notwithstanding  any
                other  provision  of this Section  4.5.2,  if, after the Closing
                Date,   Buyer  is  informed  of,  or   inadvertently   discovers
                Environmental  Contamination that does not require the giving of
                notice to either a Governmental Body or to the landlord pursuant
                to the applicable lease,  Buyer shall give notice of same to VSI
                and  Seller  and  VSI and  Seller  shall  perform  Environmental
                Remediation to the standards set forth in Section 4.5.4.

                         4.5.3  Seller and VSI have the right to  undertake  any
                Environmental Remediation for which they are responsible subject
                to reasonable  agreement of Buyer and VSI  regarding  access to,
                and   non-interference   with   activities   of  Buyer  on,  the
                Facilities.  Seller and VSI shall be entitled to receive monthly
                reimbursement  from  the  Escrow  Fund  for  the  costs  of that
                Environmental Remediation to the extent funds are available.

                         4.5.4 The extent to which  Environmental  Contamination
                must be  remediated,  if at all,  shall be to the highest levels
                allowed  by  law  that  do  not   require  the   imposition   of
                institutional  controls  unless those  controls would not impair
                the  value,  or  interfere  with  the  reasonable  use,  of  the
                property,  and,  if  the  Facility  is on  leased  property,  to
                whatever level the landlord ultimately agrees; provided however,
                institutional  controls  that impair value may be allowed if VSI
                or Seller pays Buyer for the diminution in value attributable to
                that impairment.

<PAGE>
 .       5.      Other Covenants and Agreements

               5.1 Guaranty of Receivables. At the Closing, Seller and VSI shall
          execute  and  deliver  to Buyer a  Guaranty  in the form set  forth as
          Exhibit "B" hereto (the  "Receivables  Guaranty"),  under the terms of
          which Seller and VSI,  jointly and  severally,  shall  unconditionally
          guarantee that all indebtedness represented by the accounts receivable
          of VSI and  Seller  as of the  Closing  Date  (less  the  reserve  for
          doubtful  accounts not to exceed an  aggregate  of  $125,000)  will be
          received by Buyer.  Within 160 days following the Closing Date,  Buyer
          shall  prepare  and  deliver  to  VSI  and  Seller  an  accounting  of
          collections  on such  receivables  on or before 150 days following the
          Closing  Date,  certified  as true and correct by the Chief  Financial
          Officer of Buyer.  In the event such net  indebtedness is not received
          by Buyer on or before 150 days after the Closing Date,  VSI and Seller
          shall within ten business  days  following  receipt from Buyer of such
          accounting giving notice to such effect cause the Escrow Agent to make
          payment  from the  Escrow  Fund to Buyer of an amount in cash equal to
          the difference  between such net  indebtedness and the amount received
          by Buyer for such accounts receivable,  whereupon Buyer shall promptly
          assign or cause to be assigned  to VSI or Seller all  rights,  claims,
          actions  or causes of action  which  Buyer may have  relating  to such
          unpaid receivables. In the event that the amount received by Buyer for
          such accounts  receivable shall be in excess of such net indebtedness,
          the amount of such excess  will be paid by Buyer to VSI (from  Buyer's
          own funds and not from the Escrow  Fund)  within such ten business day
          period.  During the 150 days  following the Closing Date,  Buyer shall
          use reasonable and customary  efforts to collect such receivables (but
          shall  not be  obligated  to  initiate  litigation)  and  any  amounts
          received  by Buyer in respect  of such  accounts  receivable  shall be
          applied first to the oldest such account  receivable of the respective
          account  debtor  unless  the  account  debtor   specifically   directs
          otherwise in writing without any direction from Buyer.

                 5.2 Restrictive Covenants

                         5.2.1  Customer  Restriction.  Each of  Seller  and VSI
                covenants  and agrees  that it shall  not,  for a period of five
                years  from and  after the  Closing  Date,  working  alone or in
                conjunction  with one or more  other  Persons or  entities,  for
                compensation  or not,  (i)  provide  or offer to  provide to any
                Customer  (as such term is  hereinafter  defined) any product or
                service  the same or  similar  to that  offered by VSI or Seller
                prior to the  Closing,  or (ii)  induce or attempt to induce any
                Customer to withdraw,  curtail or cancel its business with Buyer
                or in any  manner  modify  or fail to enter  into any  actual or
                potential business  relationship with Buyer. As used herein, the
                term  "Customer"  means any  Person  or  entity  for whom VSI or
                Seller  provided  services on or prior to the Closing Date or to
                whom VSI or Seller provided a product on or prior to the Closing
                Date.
<PAGE>
                         5.2.2  Non-Raid.  Each  Seller  and VSI  covenants  and
                agrees  that it shall  not,  for a period of five years from and
                after the Closing Date, working alone or in conjunction with one
                or more other Persons or entities,  for compensation or not, (i)
                recruit or otherwise  solicit or induce any Person or entity who
                is, on the Closing Date or thereafter,  an employee or vendor of
                VSI or Seller to terminate their  employment  with, or otherwise
                cease their  relationship with, Buyer or any of its subsidiaries
                or affiliates,  or (ii) hire,  recruit or otherwise  solicit any
                Person  or  entity  who,  within  the  six  months   immediately
                preceding  the Closing  Date,  had been an employee or vendor of
                VSI or Seller.

                         5.2.3 Noncompetition.  Each of Seller and VSI covenants
                and agrees  that it shall  not,  for a period of five years from
                and after the Closing Date, working alone or in conjunction with
                one or more other Persons or entities,  for compensation or not,
                permit  VSI's or  Seller's  name to be used by or  engage  in or
                carry on,  directly  or  indirectly,  either  for itself or as a
                member of a partnership  or as a stockholder,  investor,  agent,
                associate  or   consultant   of  any  Person,   partnership   or
                corporation  (other than Buyer or a  subsidiary  or affiliate of
                Buyer), any business in competition with the business as carried
                on by VSI or Seller on the Closing Date, but only for as long as
                such like business is carried on by (i) Buyer or any  subsidiary
                or  affiliate  of  Buyer,  or  (ii)  any  Person,   corporation,
                partnership,  trust or other  organization  or  entity  deriving
                title  from Buyer to the assets  and  goodwill  of the  business
                being  carried on by VSI or Seller on the Closing  Date,  in any
                county in any state of the United  States in which  Buyer or any
                subsidiary or affiliate of Buyer  conducts  business,  or in any
                other  county  in any  state  of the  United  States,  or in any
                country  or  political  subdivision  of the world.  The  parties
                intend that the covenants  contained in this Section 5.2.3 shall
                be  deemed to be a series of  separate  covenants,  one for each
                county in each state of the United  States and for each  country
                and  political   subdivision  of  the  world  and,   except  for
                geographic  coverage,  each  such  separate  covenant  shall  be
                identical  in terms to the  covenant  contained  in this Section
                5.2.3.

                         5.2.4 Tolling.  The term of the covenants  contained in
                Section  5.2.1,  5.2.2 or 5.2.3  hereof  shall be tolled for the
                period commencing on the date any successful action is filed for
                injunctive  relief or damages  arising out of a breach by VSI or
                Seller of Section  5.2.1,  5.2.2 or 5.2.3 hereof and ending upon
                final adjudication (including appeals) of such action.

                         5.2.5 Reformation.  If, in any judicial proceeding, the
                court  shall  refuse to enforce  all of the  separate  covenants
                contained in Section  5.2.1,  5.2.2 or 5.2.3 hereof  because the
                time limit is too long,  it is expressly  understood  and agreed
                between the parties hereto that for purposes of such  proceeding
                such time  limitation  shall be  deemed  reduced  to the  extent

<PAGE>
                necessary to permit  enforcement of such  covenants.  If, in any
                judicial  proceeding,  the court shall  refuse to enforce all of
                the  separate  covenants  contained in Section  5.2.1,  5.2.2 or
                5.2.3  hereof  because  it  is  more  extensive  (whether  as to
                geographic  area, scope of business or otherwise) than necessary
                to protect the business  and goodwill of Buyer,  it is expressly
                understood  and  agreed  between  the  parties  hereto  that for
                purposes  of such  proceeding  the  geographic  area,  scope  of
                business or other aspect  shall be deemed  reduced to the extent
                necessary to permit enforcement of such covenants.

                         5.2.6  Injunctive  Relief.   Each  of  VSI  and  Seller
                acknowledges  that a breach  of  Section  5.2.1,  5.2.2 or 5.2.3
                hereof would cause irreparable damage to Buyer, and in the event
                of its actual or threatened  breach of the provisions of Section
                5.2.1,  5.2.2 or 5.2.3  hereof,  Buyer  shall be  entitled  to a
                temporary  restraining order and an injunction  restraining each
                of VSI and Seller  from  breaching  such  covenants  without the
                necessity  of posting  bond or proving  irreparable  harm,  such
                being conclusively admitted by VSI and Seller.  Nothing shall be
                construed as prohibiting Buyer from pursuing any other available
                remedies for such breach or  threatened  breach,  including  the
                recovery of damages from each of VSI and Seller. Each of VSI and
                Seller  acknowledges that the restrictions set forth in Sections
                5.2.1,  5.2.2  and  5.2.3  hereof  are  reasonable  in scope and
                duration, given the nature of the business of Buyer.

                         5.2.7  Use of  Name.  Each  of  Seller  and  VSI  shall
                discontinue all use of the name "Valley Systems" and any and all
                derivations thereof within 30 days after the Closing Date (other
                than in  respect of the name of VSI's  401(k)  plan prior to its
                termination).

                         5.2.8 No  Dissolution.  Neither  VSI nor  Seller  shall
                dissolve until the entire Escrow Fund has been released pursuant
                to Section 5.3 hereof.

                5.3      Escrow

                         5.3.1 The Escrow Fund shall be the exclusive  source of
                recovery   in   respect   of  each   of   VSI's   and   Seller's
                indemnification  obligations  pursuant  to  Section  4 hereof or
                otherwise arising under this Agreement  (including the Schedules
                hereto) or any other  agreement  between Buyer and VSI or Seller
                entered into in connection  herewith,  including any claim based
                upon each of VSI's and Seller's warranties,  representations and
                covenants  contained herein including those contained in Section
                5.1 hereof. The Escrow Fund shall be held and distributed,  with
                interest, by Bank One Texas, N.A. (the "Escrow Agent"), pursuant
                to an  Escrow  Agreement  in the form set forth as  Exhibit  "C"
                hereto (the  "Escrow  Agreement"),  which shall be executed  and
                delivered by VSI, Seller and Buyer at the Closing.

<PAGE>
                         5.3.2  Buyer  shall be  entitled  to  receive  from the
                Escrow Fund a payment equal to the amount,  if any, provided for
                in Section 5.1 hereof without regard to the Floor Amount.

                         5.3.3  Subject  to  Sections  4.5.2 and  5.3.6  hereof,
                Seller and VSI shall be entitled to receive from the Escrow Fund
                the costs of  Environmental  Remediation  at all  Facilities not
                excluded  by Buyer from the  Assets  pursuant  to Section  5.5.2
                hereof and in accordance with the terms of the Escrow Agreement.

                         5.3.4 In the event  that any Buyer  Indemnitee  has any
                claim for  damages  based  upon VSI's and  Seller's  warranties,
                representations  and  covenants  contained  herein or  otherwise
                arising  hereunder or any other agreement  between Buyer and VSI
                or Seller entered into in connection  herewith (other than VSI's
                and Seller's obligations under Section 5.1 hereof),  Buyer shall
                give written  notice of same to VSI and Seller and shall forward
                a copy of such notice to the Escrow Agent.  If VSI or Seller has
                not   corrected  or  remedied   such  failure  of   performance,
                representation,  warranty or covenant  within 30 days  following
                receipt of such notice, then VSI and Seller acknowledge, subject
                to the  provisions  of Section 5.15 hereof,  that Buyer shall be
                entitled to receive from the Escrow Fund, in accordance with the
                terms of the Escrow  Agreement,  the  amount of  indemnification
                that Buyer is due pursuant to this Agreement.

                         5.3.5  Provided  no dispute or disputes in excess of an
                aggregate  of  $3,000,000  (or  $2,000,000,  if that part of the
                Escrow Fund subject to Section 5.3.6 hereof has been released to
                VSI or Seller), less the amount of any payments theretofore made
                in  satisfaction  of  Seller's  or  VSI's   indemnification  and
                guaranty obligations hereunder,  exist as to any Claim or Claims
                by any Buyer  Indemnitee  against all or a portion of the Escrow
                Fund  on  the  first  anniversary  of  the  Closing  Date,  then
                $1,000,000,  less the amount of any payments in  satisfaction of
                VSI's  or  Seller's  indemnification  and  guaranty  obligations
                hereunder,  will  be  released  to  Seller  or VSI on the  first
                business day  following  such first  anniversary  of the Closing
                Date.  To the extent such a dispute or disputes do exist as to a
                Claim or Claims on the first anniversary of the Closing Date, an
                amount  equal to the  amount  of such  Claim or  Claims  will be
                withheld  from such partial  release of the Escrow Fund and will
                continue to be held in  accordance  with the  provisions  of the
                Escrow  Agreement  until  such  Claim or Claims  have been fully
                resolved.  Provided  no  dispute  or  disputes  in  excess of an
                aggregate  of  $2,000,000  (or  $1,000,000,  if that part of the
                Escrow Fund subject to Section 5.3.6 hereof has been released to
                VSI or Seller), less the amount of any payments theretofore made
                in  satisfaction  of  Seller's  or  VSI's   indemnification  and
                guaranty obligations hereunder,  exist as to any Claim or Claims
                by any Buyer  Indemnitee  against all or a portion of the Escrow
                Fund on the second  anniversary  of the  Closing  Date,  then an
                additional   $1,000,000,   less  the  amount  of  any   payments
                theretofore   made  in   satisfaction   of  VSI's  or   Seller's
                indemnification  and  guaranty  obligations  hereunder,  will be
                released to Seller or VSI on the first  business  day  following
                such second  anniversary of the Closing Date. To the extent such

<PAGE>
                a dispute  or  disputes  do exist as to a Claim or Claims on the
                second  anniversary  of the Closing Date, an amount equal to the
                amount  of such  Claim or  Claims  will be  withheld  from  such
                partial  release of the Escrow Fund and will continue to be held
                in accordance with the provisions of the Escrow  Agreement until
                such  Claim or Claims  have been  fully  resolved.  Provided  no
                dispute or disputes exist as to any Claim or Claims by any Buyer
                Indemnitee  against  all or a portion of the Escrow  Fund on the
                third anniversary of the Closing Date, then the remainder of the
                Escrow  Fund  will be  released  to  Seller  or VSI on the first
                business day  following  such third  anniversary  of the Closing
                Date and the Escrow Agreement shall thereupon terminate.  To the
                extent a dispute or disputes do exist as to a Claim or Claims on
                the third  anniversary  of the Closing  Date, an amount equal to
                the amount of such Claim or Claims  will be  withheld  from such
                release  of the  Escrow  Fund  and will  continue  to be held in
                accordance  with the  provisions of the Escrow  Agreement  until
                such Claim or Claims  have been  fully  resolved.  Seller's  and
                VSI's  obligations  hereunder  shall  not  be  affected  by  any
                termination of the Escrow Agreement.

                         5.3.6 On or before the first anniversary of the Closing
                Date,  VSI shall  certify in writing to Buyer that VSI or Seller
                or both have  completed  the  Environmental  Remediation  of the
                Environmental  Contamination identified by the Environmental Due
                Diligence  Review as required by the terms of Section 4.5 hereof
                as to all  Facilities  not excluded by Buyer pursuant to Section
                5.5.2  hereof  as  well  as  any   Environmental   Contamination
                identified  during the  Environmental  Remediation  (or,  in the
                event that such  Environmental  Remediation  is not completed at
                the first  anniversary  of the Closing Date, VSI shall deliver a
                certificate of the environmental engineering and consulting firm
                which is effecting such Environmental Remediation estimating the
                additional  time required for such completion and the additional
                cost thereof  ("Estimated  Additional  Remediation  Cost"). Upon
                delivery to Buyer of VSI's  certificate  or the  certificate  of
                such firm,  as the case may be, an amount  equal to  $1,000,000,
                less  the sum of (i) the  aggregate  cost of such  Environmental
                Remediation  (including  the  Estimated  Additional  Remediation
                Cost) and (ii) the aggregate amount of other Losses of all other
                Buyer Indemnitees subject to indemnification pursuant to Section
                4.1 hereof in excess of $3,000,000,  shall forthwith be released
                to VSI and Seller out of the Escrow Fund. In the event that such

<PAGE>
                Environmental   Remediation  was  not  completed  at  the  first
                anniversary  of the Closing  Date,  VSI shall deliver to Buyer a
                certificate   of   completion   thereof  upon  such   completion
                containing   a   statement   of  the   aggregate   cost  of  the
                Environmental   Remediation   effected   following   such  first
                anniversary,  and Buyer shall  immediately  release to Seller or
                VSI out of the Escrow Fund the amount,  if any, which would have
                been  released  to  Seller  or  VSI  under  this  Section  5.3.6
                following such first  anniversary  had such actual cost,  rather
                than the Estimated  Additional  Remediation  Cost,  been used in
                such calculation.

                5.4      Conduct of the Business.

                         5.4.1  Affirmative  Covenants.  On and  after  the date
                hereof and until the Closing Date or the date,  if any, on which
                this Agreement is earlier  terminated and abandoned  pursuant to
                Section 7 hereof (the  "Termination  Date"),  each of Seller and
                VSI shall:

                         (i) conduct its  operations  according  to its ordinary
                    and usual course of business  consistent with past practice;
                    and

                         (ii) use its reasonable best efforts to preserve intact
                    its business  organization  and goodwill,  to keep available
                    the services of its officers and directors,  and to maintain
                    satisfactory  relationships  with  suppliers,  distributors,
                    licensors, licensees, customers, Employees and others having
                    business relationships with it.

                         5.4.2   Negative   Covenants.   Without   limiting  the
                generality of the foregoing,  and except for actions to be taken
                in connection with any of the transactions  contemplated hereby,
                without  Buyer's prior written  consent,  VSI shall not, and VSI
                shall cause Seller not to, on or after the date hereof and until
                the earlier of the Closing Date or the Termination Date:

                         (i)  other  than  dividends  that  would be paid to the
                    holders  of the  Series C  Preferred  Stock in the  ordinary
                    course, declare or pay any cash dividends on its outstanding
                    shares of capital stock;

                         (ii) merge with,  consolidate  with, sell its assets to
                    or acquire substantially all the assets or capital stock of,
                    any other  corporation  or  Person,  or enter into any other
                    transaction  not in the  ordinary  and  usual  course of its
                    business;

                         (iii)  incur any  indebtedness  for  borrowed  money or
                    guarantee  any such  indebtedness  or issue or sell any debt
                    securities  or  guarantee  any debt  securities  of  others,
                    except that it may incur indebtedness in the ordinary course
                    of business consistent with prior practice;
<PAGE>
                         (iv) make any direct or indirect  redemption,  purchase
                    or other acquisition of any of its capital stock;

                         (v) create or amend any pension or profit sharing plan,
                    bonus, deferred  compensation,  death benefit, or retirement
                    plan, or any other benefit plan or program;

                         (vi) amend its Certificate of  Incorporation or Bylaws,
                    as amended to the date hereof, except as may be necessary to
                    carry out this Agreement or as required by law;

                         (vii) issue any shares of its capital stock, effect any
                    stock split or  otherwise  change its  capitalization  as it
                    exists on the date hereof;

                         (viii)  grant,  confer or award any options,  warrants,
                    conversion rights or other rights,  not existing on the date
                    hereof, to acquire any shares of its capital stock;

                         (ix) enter into any  agreement or make any  undertaking
                    which could be violated,  or create  obligations which could
                    be  accelerated,  as a result of changes or  developments or
                    the  absence of changes or  developments  in, the  business,
                    assets,  earnings,  operations  or  condition,  financial or
                    otherwise,   of  any  other  party  hereto  or  any  of  its
                    subsidiaries or affiliates; or

                         (x)  make  any   material   changes  in  any  of  their
                    respective management employment arrangements.

              5.5      Due Diligence; Access to Information and Customers

                         5.5.1 General Due Diligence Review.  From and after the
                    date hereof and  throughout  the period prior to the earlier
                    of the Closing Date or the Termination  Date,  Buyer and its
                    officers,   employees,   accountants,   counsel   and  other
                    authorized  representatives  may  perform  a  due  diligence
                    review of VSI and  Seller  relating  to  matters  other than
                    Environmental matters. In the event that the results thereof
                    are  not  reasonably   satisfactory  to  Buyer,   Buyer  may
                    terminate  this  Agreement  as  provided  in  Section  7.1.4
                    hereof.

                         5.5.2  Environmental  Due  Diligence  Review.  From and
                    after the date hereof  through the Closing  Date,  Buyer and
                    its  officers,  employees,  accountants,  counsel  and other
                    authorized  representatives  will  perform  a due  diligence
                    review of VSI and Seller relating to  Environmental  matters
         <PAGE>
                    associated  with the  Facilities,  and activities of VSI and
                    Seller  (collectively,   the  "Environmental  Due  Diligence
                    Review").   Buyer  shall   cause  a  qualified   independent
                    environmental  engineering  and consulting  firm  reasonably
                    acceptable to VSI to perform such a review.  Buyer shall not
                    provide   a  copy  of  any   report   resulting   from   the
                    Environmental  Due Diligence to VSI, unless VSI specifically
                    requests  otherwise.  If  the  Environmental  Due  Diligence
                    Review  reveals that one or more  Facilities has one or more
                    problems  relating to the  Environment  (including,  but not
                    limited to,  Environmental  Liabilities)  the  remedying  of
                    which  is or are  reasonably  advisable,  and the  aggregate
                    estimated  cost of such  remedy  as  quoted  to  Buyer is in
                    excess  of  $1,000,000,  then  Buyer  will have the right to
                    exclude any one or more of such  Facilities  from the Assets
                    so that the  aggregate  estimated  cost of the remedying the
                    problems at the  remaining  Facilities  shall be as close to
                    $1,000,000 as practicable without exceeding $1,000,000.

                         5.5.3  Reimbursement  for  Environmental  Due Diligence
                    Review.  If, as a result of the  Environmental Due Diligence
                    Review,  Environmental  Contamination  is discovered that is
                    indemnifiable as a Loss under Section 4.1 hereof pursuant to
                    Section 4.5.1  hereof,  VSI shall  reimburse  Buyer from the
                    Escrow  Fund for the total  costs of the  Environmental  Due
                    Diligence  Review of each property where such  indemnifiable
                    Environmental Contamination is present.

                         5.5.4 Access.  Each of VSI and Seller shall, as soon as
                    possible and in any event no later than the  Delivery  Date,
                    (i)  afford  to  Buyer  and  to  its  officers,   employees,
                    accountants,  counsel and other  authorized  representatives
                    reasonable  access,  throughout  the  period  prior  to  the
                    earlier of the Closing Date or the Termination Date, to each
                    of  VSI's  and  Seller's  plants,   properties,   equipment,
                    personnel, books and records (including, but not limited to,
                    audit and tax work  papers and  surveys,  reports,  studies,
                    evaluations  and the like  pertaining to the  Environment at
                    the  Facilities  or Former  Facilities  (during  the time of
                    ownership or operation by VSI or Seller, or to activities of
                    VSI or  Seller);  (ii) use its  reasonable  best  efforts to
                    cause its  representatives  to  furnish  to Buyer and to its
                    authorized  representatives  such  additional  financial and
                    operating  data and other  information  as to its respective
                    businesses  and  properties as Buyer or its duly  authorized
                    representatives  may from time to time  reasonably  request;
                    (iii) provide all  authorizations  reasonably  necessary for
                    Buyer  to  review  records  of any  Governmental  Body  with
                    jurisdiction;  and (iv) afford Buyer and its representatives
                    reasonable  access,  throughout  the  period  prior  to  the
                    earlier of the Closing Date or the Termination  Date, to its

<PAGE>
                    present  and   potential   customers,   and  Buyer  and  its
                    authorized  representatives  shall have the right to contact
                    such customers and conduct such due diligence  investigation
                    relating to  customer  relations  as Buyer deems  reasonably
                    necessary  or  appropriate.  Buyer agrees to perform all due
                    diligence  under this Section 5.5 using its reasonable  best
                    efforts  to  minimize   disruption  to  VSI's  and  Seller's
                    business. Buyer further agrees to indemnify, defend and hold
                    Seller  harmless  for all  losses  resulting  from  physical
                    damages  caused  by Buyer or its  agents  in the  course  of
                    Buyer's  due  diligence,  and to restore the  Facilities  to
                    substantially the same condition they were in prior thereto.
                    Buyer  further  agrees to dispose of any wastes or materials
                    it or its  agents  generated  during the  Environmental  Due
                    Diligence  Review,  and  to  do so in  accordance  with  all
                    applicable Legal Requirements.

                         5.5.5 Monthly Financial Statements and Reports. VSI and
                    Seller shall deliver to Buyer unaudited financial statements
                    (including  a  consolidated   balance  sheet,   consolidated
                    statement  of  operations,  consolidated  statement  of cash
                    flows, and consolidated  statement of stockholders'  equity)
                    and other  operating  reports for each month  beginning with
                    July  1998 and  ending  with the month  preceding  the month
                    during which the Closing occurs.  Such financial  statements
                    and  operating  reports shall be delivered to Buyer no later
                    than  twenty  business  days  after the end of the month the
                    subject  thereof  and shall be  subject  to no  warranty  or
                    representation of Seller or VSI.

          5.6 Acquisition  Proposals.  Neither VSI nor Seller shall, directly or
     indirectly, through any officer, director, agent, affiliate, representative
     (including,   without  limitation,   investment   bankers,   attorneys  and
     accountants) or otherwise, (i) solicit, initiate or encourage submission of
     inquiries, proposals or offers from any Person, corporation, partnership or
     other  entity  or group (as such term is used in  Section  13(d)(3)  of the
     Exchange  Act)  other  than  Buyer  (a  "Third  Party"),  relating  to  any
     acquisition or purchase of all or a portion of the assets of, or any equity
     interest in, VSI or Seller;  or (ii) unless the Board has  determined  that
     such Third Party has made a Superior Takeover Proposal,  participate in any
     discussions or  negotiations  regarding,  or furnish to any Third Party any
     information  with  respect to, or otherwise  cooperate in any way with,  or
     assist or participate in, facilitate or encourage, any effort or attempt by
     any Third Party to do or seek any of the  foregoing.  VSI and Seller  shall
     promptly  notify  Buyer if any such  proposal  or offer,  or any inquiry or
     contact with any Third Party with respect  thereto,  is made,  and shall in
     any such notice set forth in  reasonable  detail the  identity of the Third
     Party and the terms and conditions of such inquiry,  proposal or offer.  In
     the event that (a) the Closing  shall fail to occur as the result of VSI or
     Seller  violating  the terms of this Section 5.6 or (b) VSI or Seller shall
     have  determined  that a  Superior  Takeover  Proposal  exists,  shall have
     elected  to  accept  such  Superior   Takeover   Proposal  and  either  the
<PAGE>

     transaction contemplated thereby is consummated or VSI or Seller terminates
     this Agreement as a result of such election, VSI and Seller shall promptly,
     but in no event  later  than one day after the first of such  events  shall
     occur,  pay Buyer an  aggregate  fee of  $2,000,000,  which amount shall be
     payable  in same  day  funds,  plus  all  Expenses.  A  "Superior  Takeover
     Proposal"  means any bona fide (w) tender or exchange  offer;  (x) proposal
     for a merger to which VSI or Seller would be a party; (y)  consolidation or
     other  business  combination  involving  VSI or  Seller;  or (z) any  other
     arrangement  to  acquire,   directly  or  indirectly,   for   consideration
     consisting of cash,  securities or a combination thereof, all of the common
     stock of VSI or Seller then outstanding or all or substantially  all of the
     assets  of VSI or Seller on terms  that the  Board  determines  in its good
     faith reasonable  judgment (after  consultation with a financial advisor of
     nationally recognized  reputation) to be more favorable to the stockholders
     of VSI than the transactions contemplated by this Agreement.

          5.7 Public  Announcements.  On or after the date hereof, and until the
     earlier of the Closing Date or the Termination Date, neither VSI nor Seller
     shall furnish any written communication (other than the Proxy Materials) to
     its  stockholders,  customers,  creditors or to the public generally if the
     subject  matter thereof  relates to the  transactions  contemplated  hereby
     without the prior  approval of Buyer as to the content  thereof;  provided,
     however,  that the foregoing shall not be deemed to prohibit any disclosure
     required  by  any  applicable  law  or  by  any  Governmental  Body  having
     jurisdiction over such matters.

          5.8 Notification of Certain Matters.  VSI and Seller shall give prompt
     notice to Buyer,  and Buyer shall give prompt notice to VSI and Seller,  of
     (i) the occurrence,  or failure to occur, of any event which  occurrence or
     failure  would be likely to cause any  representation  or  warranty of such
     party contained  herein to be untrue or inaccurate in any material  respect
     at any time from the date hereof to the Closing Date; and (ii) any material
     failure  of VSI or  Seller,  or of  Buyer,  as the case  may be,  or of any
     officer, director, employee or agent thereof, to comply with or satisfy any
     covenant,  condition or  agreement  to be complied  with or satisfied by it
     hereunder.

          5.9  Best  Efforts.  Each of VSI and  Seller  agrees  to use its  best
     efforts to take, or cause to be taken, all actions,  and to do, or cause to
     be done, all things reasonably necessary, proper or advisable to consummate
     and make effective the transactions contemplated hereby, including, without
     limitation,  obtaining all authorizations,  consents, waivers and approvals
     as may be required in connection  with the  assignment of those  contracts,
     agreements,  licenses,  leases,  sales  orders,  purchase  orders and other
     commitments  to be assumed by Buyer pursuant  hereto;  provided that Seller
     shall not be  obligated  to make any  payments  in order to obtain any such
     authorizations, consents, waivers or approvals.
<PAGE>
          5.10 Execution of Additional Documents.  Each party hereto will at any
     time,  and from time to time after the Closing  Date,  upon  request of the
     other party  hereto,  execute,  acknowledge  and  deliver all such  further
     deeds,  assignments,   transfers,   conveyances,  powers  of  attorney  and
     assurances, and take all such further action, as may be reasonably required
     to carry out the intent of this  Agreement,  and to transfer and vest title
     to any Asset being transferred  hereunder,  and to protect the right, title
     and interest in and enjoyment of all of the Assets sold, granted, assigned,
     transferred,  delivered and conveyed  pursuant hereto;  provided,  however,
     that this  Agreement  shall be  effective  regardless  of whether  any such
     additional documents are executed.

                5.11     Fees and Expenses

                         5.11.1  Expense  Reimbursement.  If this  Agreement  is
                terminated by VSI or Seller for any reason whatsoever other than
                a failure of any  condition  set forth in Section 6.2 hereof and
                Buyer is not in material  breach of its material  covenants  and
                agreements  hereunder,  then VSI or Seller shall, whether or not
                any payment is made pursuant to Section 5.11.2 hereof, reimburse
                each of Buyer and its  stockholders  and  affiliates  (not later
                than one day after  submission of  statements  therefor) for all
                reasonable  out-of-pocket expenses and fees actually incurred by
                it  or  on  its  behalf  in  connection  with  the  negotiation,
                preparation, execution and performance of this Agreement and the
                transactions  contemplated  hereby,  or reasonably  and actually
                incurred by banks and other financial  institutions  and assumed
                by Buyer or its  stockholders  or affiliates in connection  with
                the negotiation,  preparation, execution and performance of this
                Agreement,  any  financing  related  hereto  and any  definitive
                financing  agreements  relating  thereto  (all of the  foregoing
                being referred to herein collectively as the "Expenses").

                         5.11.2  Other Costs and  Expenses.  Except as otherwise
                provided herein,  all costs and expenses  incurred in connection
                with this  Agreement and the  transactions  contemplated  hereby
                shall be paid by the party incurring such costs and expenses.

          5.12  Limitation of  Liability.  Notwithstanding  any other  provision
     hereof,  no shareholder,  officer,  director,  employee,  agent,  attorney,
     affiliate,  servant,  successor,  assign or  representative of either party
     hereto or of any affiliate  thereof  shall have any personal,  partnership,
     corporate or other  liability  or  obligation  whatsoever  in respect of or
     relating to the covenants,  obligations,  indemnities,  representations  or
     warranties  of Buyer or VSI and  Seller  under or by  reason  hereof  or in
     respect of any certificate or other document delivered with respect hereto.

          5.13 HSR Act  Filings.  Each of VSI and Seller and Buyer shall as soon
     as  practicable  after the date of this  Agreement  file  their  respective

<PAGE>
     notification  and report forms with the Federal  Trade  Commission  and the
     United States  Department of Justice as required under the HSR Act. Each of
     VSI and Seller and Buyer agree to use their  respective  good faith efforts
     to eliminate any concern on the part of any Governmental Body regarding the
     legality of the transactions contemplated under this Agreement.

          5.14 Employees. Buyer shall, effective as of Closing, offer employment
     to all Employees of Seller  (subject to  satisfaction  of Buyer's  standard
     conditions to employment) other than as otherwise reasonably  determined by
     Buyer  (but in no  event  shall  Buyer  terminate  such  number  of  former
     employees of Seller during such time periods as would require any action on
     the part of Seller under WARN). In addition, service credit for purposes of
     eligibility  to  participate  in the  Buyer's  401(k)  plan  (and any other
     qualified  retirement  plans  maintained by Buyer) shall be granted to each
     Employee  employed  by Buyer  with  respect  to such  Employee's  period of
     employment with Seller and/or VSI. Upon Closing, Seller shall terminate its
     Profit Sharing 401(k) Plan ("Plan"), and as soon as may be administratively
     feasible thereafter shall submit to the Internal Revenue Service ("IRS") an
     application  for a favorable  determination  letter  concerning  the Plan's
     continued qualification upon its termination. Pending the Plan's receipt of
     such letter from the IRS,  Buyer shall accept Plan loan  payments  from the
     Employees hired by Buyer, for remittance to the Trustee of Seller's Plan on
     at least a monthly  basis.  Upon the Plan's receipt of such letter from the
     IRS,  Buyer  shall  cause  its  401(k)  plan  to  accept  direct   transfer
     contributions  on  behalf  of such  Employees  who  choose  to make  direct
     transfers to Buyer's 401(k) plan, which direct transfer  contributions  may
     include,  at the  election of the  Employee,  any  outstanding  loan in the
     Employee's  Plan account for which  repayments  are then  current.  VSI and
     Seller shall fully cooperate with Buyer and lend all assistance  reasonably
     requested by Buyer for the purpose of  facilitating  Buyer's  employment of
     and communication with Employees of Seller,  including, but not limited to,
     allowing  access to the  Facilities and any Employees and payroll and other
     Employee records requested by Buyer.

          5.15  Dispute  Resolution.  Other than as  provided  in Section  1.9.2
     hereof and notwithstanding any provision of this Agreement to the contrary,
     all disputes,  controversies  or claims  arising out of or relating to this
     Agreement  and the  transactions  contemplated  hereby shall be resolved by
     agreement among the parties,  or, if not so resolved within forty five (45)
     days  following  written  notice of dispute given by either party hereto to
     the  other,  and if  written  notice is given by either of the  parties  as
     provided  below and the matter is not  otherwise  resolved  by the  parties
     hereto,  by resort to arbitration in accordance  with Title 9 of the United
     States  Code  (the  United  States  Arbitration  Act)  and  the  Commercial
     Arbitration  Rules,  as  amended  from  time to time (the  "Rules")  by the
     American Arbitration  Association and the following  provisions;  provided,
     however,  that the provisions of this Section shall prevail in the event of
     any conflict  with such Rules.  Within thirty (30) days after the giving of
     notice by a party to the other parties of its desire to refer the matter in
     dispute  to  arbitration,  the  parties  agree  that  the  matter  shall be
     presented to a panel of three  arbitrators  at least one of whom shall have

<PAGE>
     at least ten years of industry experience relating to the subject matter of
     the dispute. Such selection of arbitrators shall be made in accordance with
     the Rules. Any such  arbitration  proceeding shall be held at a location to
     be  determined by the  arbitrators.  Any  provisional  remedy that would be
     available from a court of law shall be available from the arbitrator to the
     parties to this Agreement  pending  arbitration.  The written decisions and
     conclusions  of a majority  of the  arbitration  panel with  respect to the
     matters  referred to them  pursuant  hereto shall be final and binding upon
     the parties to the dispute, and confirmation and enforcement thereof may be
     rendered thereon by any court having  jurisdiction  upon application of any
     person who is a party to the arbitration proceeding. The costs and expenses
     incurred in the course of such  arbitration  shall be borne by the party or
     parties   against  whose  favor  the  decisions  and   conclusions  of  the
     arbitration panel are rendered;  provided, however, that if the arbitration
     panel  determines  that its decisions are not rendered  wholly  against the
     favor of one party or parties or the other, the arbitration  panel shall be
     authorized to apportion such costs and expenses in the manner that it deems
     fair and just in light of the merits of the dispute and its resolution. The
     arbitration  panel shall have no power or authority under this Agreement or
     otherwise  to award or provide for the award of  punitive or  consequential
     damages against any party. In any arbitration relating to whether Buyer has
     "reasonably concluded" (for purposes of Section 6.1.16) that there has been
     no  material  breach of the  warranties  in  Section  2.24,  the  burden of
     establishing reasonableness shall be on Buyer.

 .       6.      Conditions of Closing

          6.1 Buyer's Conditions to Closing. The obligation of Buyer to purchase
     and pay  for  the  Assets  and to  assume  the  specified  liabilities  and
     obligations set forth herein shall be subject to and  conditioned  upon, at
     Buyer's  option,  the  satisfaction at the Closing of each of the following
     conditions:

                    6.1.1 The  holders of shares of the  issued and  outstanding
               capital  stock of VSI and  Seller  shall  have duly  adopted  and
               approved this Agreement and all transactions  contemplated hereby
               in accordance with the requirements of Delaware law and Ohio law,
               respectively,  and the Articles or Certificate  of  Incorporation
               and Bylaws, as amended to the date of such adoption and approval,
               of each of VSI and Seller.

                    6.1.2 All  representations and warranties of each of VSI and
               Seller contained herein shall be true and correct in all material
               respects at and as of the Closing Date (provided  however that in
               respect  of  the  warranties  and  representations  contained  in
               Section 2.24 hereof  Section  6.1.16 shall apply) and each of VSI
               and Seller shall have  performed all  agreements and covenants in
               all material respects and satisfied all conditions on its part to
               be performed  or  satisfied  by the Closing Date  pursuant to the
               terms hereof, and Buyer shall have received a certificate of each
               of VSI and Seller,  signed by its President and dated the Closing
               Date, to both such effects.

<PAGE>

                    6.1.3 As of the  Closing,  there shall have been no material
               change since the date of the most recent Financial  Statements in
               VSI or Seller, and neither VSI nor Seller shall have suffered any
               material  loss  (whether  or not  insured)  by reason of physical
               damage  caused by fire,  earthquake,  accident or other  calamity
               which substantially affects the value of their respective assets,
               properties   or  business,   and  Buyer  shall  have  received  a
               certificate  of each of VSI and Seller,  signed by its  principal
               financial officer and dated the Closing Date, to such effect.

                    6.1.4 Seller and VSI shall have  executed and  delivered the
               Receivables Guaranty.

                    6.1.5 VSI shall have delivered to Buyer a Certificate of the
               Secretary of State (or other authorized public official) of VSI's
               and Seller's  respective  jurisdiction of incorporation (and each
               other  jurisdiction  listed in Schedule 2.5 hereof) certifying as
               of a date  reasonably  close to the Closing Date that each of VSI
               and Seller has filed all required reports, paid all required fees
               and  taxes,  and  is,  as of such  date,  in  good  standing  and
               authorized  to  transact   business  as  a  domestic  or  foreign
               corporation, as the case may be.

                    6.1.6 Seller and VSI shall have  executed and  delivered the
               Escrow Agreement.

                    6.1.7 The Escrow  Agent shall have  acknowledged  receipt of
               the Escrow Fund and  accepted  the same  subject to the terms and
               conditions of the Escrow Agreement.

                    6.1.8  Buyer  shall  have  received  from  Arnall  Golden  &
               Gregory,  LLP, counsel for VSI and Seller, an opinion,  dated the
               Closing Date, in the form attached hereto as Exhibit "D".

                    6.1.9  Each  of VSI  and  Seller  shall  have  obtained  all
               authorizations,   consents,  waivers  and  approvals  as  may  be
               required in connection  with the  assignment of those  contracts,
               agreements,  licenses,  leases, sales orders, purchase orders and
               other commitments to be assigned to Buyer pursuant hereto.

                    6.1.10  Seller and VSI shall have executed and delivered the
               Bill of Sale, Assignment and Assumption Agreement.

<PAGE>
                    6.1.11 Each of Seller and VSI shall have  delivered to Buyer
               a  certificate,  dated  the  Closing  Date,  of each of VSI's and
               Seller's corporate Secretary certifying:

                                    (i)   Resolutions   of  the   Board,   VSI's
                           stockholders,   Seller's   board  of  directors   and
                           Seller's sole stockholder approving and adopting this
                           Agreement and all  transactions  contemplated  hereby
                           and  authorizing  execution of this Agreement and the
                           execution,    performance   and   delivery   of   all
                           agreements,  documents and transactions  contemplated
                           hereby; and

                                    (ii)   The   incumbency   of  its   officers
                           executing  this  Agreement  and  all  agreements  and
                           documents contemplated hereby.

                    6.1.12 The approval and all consents from any Third Party or
               Governmental   Body  required  to  consummate  the   transactions
               contemplated  hereby  shall have been  obtained  and the  waiting
               period and any  statutory  extension  thereof  applicable  to the
               consummation of the  transactions  contemplated by this Agreement
               under the HSR Act shall have expired or been terminated.

                    6.1.13  No   Proceeding   shall  have  been   instituted  or
               threatened  which  questions  the  validity  or  legality  of the
               transactions  contemplated  hereby or any  governmental  consent,
               approval or  authorization  necessary for the consummation of the
               transactions of the transactions contemplated by this Agreement.

                    6.1.14  As of  the  Closing,  there  shall  be no  effective
               injunction,  writ, preliminary  restraining order or any order of
               any nature issued by a court of competent  jurisdiction directing
               that the  transactions  provided for herein or any of them not be
               consummated  as so  provided or imposing  any  conditions  on the
               consummation of the transactions  contemplated  hereby,  which is
               unduly burdensome on Buyer.

                    6.1.15  Buyer shall have  received  from each of LOR,  Inc.,
               Rollins  Investment  Fund and Rollins Holding  Company,  Inc., an
               executed  agreement whereby each of them, on their own behalf and
               on behalf of their respective  affiliates,  agrees to be bound by
               certain  restrictive  covenants  substantially  similar  to those
               imposed  on  Seller  and  VSI  pursuant  to  Section  5.2 of this
               Agreement;  provided,  however,  that  no  such  provision  shall
               prohibit an  investment in any  publicly-traded  entity that does
               not require the filing of a Schedule  13D nor  Schedule 13G under
               the Exchange Act.

<PAGE>
                    6.1.16 Buyer shall have reasonably concluded,  following the
               Environmental  Due Diligence  Review,  that there are no material
               breaches in the  warranties in Section 2.24;  provided,  however,
               that such  conclusion  shall not  preclude  the remedies of Buyer
               provided for herein.  For  purposes of this Section  6.1.16 only,
               "material  breaches" shall be defined as those matters,  which in
               the opinion of the environmental  consultant retained as provided
               in Section 5.5.2, are reasonably  likely to cost in the aggregate
               in  excess  of  $1,000,000  to  remedy  (excluding  the  cost  of
               addressing  any  environmental  issues on  Facilities  that Buyer
               elects to exclude from the purchase  pursuant to Section  5.5.2).
               If Buyer's consultant so concludes,  then Buyer shall promptly so
               inform VSI of the consultant's opinion. At such time, VSI may ask
               Buyer for the information and data upon which Buyer's  consultant
               bases  his or her  opinion.  If VSI  does  not  agree  that it is
               reasonably  likely to cost in excess of  $1,000,000 to remedy the
               environmental  problems,  then VSI shall promptly inform Buyer of
               its  belief.  If the parties  cannot  resolve  this issue  within
               fifteen days after VSI so informs Buyer, then the matter shall be
               submitted to arbitration in accordance  with Section 5.15 and the
               Closing  shall  be  delayed   pending  the   resolution  of  such
               arbitration.  If the transaction  closes, then VSI's and Seller's
               obligation  to perform  any  Environmental  Remediation  shall be
               governed by the provisions and standards set forth in Section 4.5

          6.2 Seller's and VSI's Conditions to Closing. The obligation of Seller
     and VSI to sell,  grant,  convey,  assign,  transfer and deliver the Assets
     shall be subject to and conditioned upon, at VSI's option, the satisfaction
     at the Closing of each of the following conditions:

               6.2.1 The holders of shares of the issued and outstanding capital
          stock of VSI shall have duly adopted and approved  this  Agreement and
          all   transactions   contemplated   hereby  in  accordance   with  the
          requirements of Delaware law and the Certificate of Incorporation  and
          Bylaws, as amended to the date of such adoption, of VSI.

               6.2.2  All  representations  and  warranties  of Buyer  contained
          herein  shall be true and correct at and as of the Closing Date in all
          material  respects and Buyer shall have  performed all  agreements and
          covenants in all material respects and satisfied all conditions on its
          part to be performed or satisfied by the Closing Date  pursuant to the
          terms hereof,  and VSI and Seller shall have received a certificate of
          Buyer,  signed by its Chief  Executive  Officer  and dated the Closing
          Date, to both such effects.

               6.2.3 Buyer shall have  effected  payment of the  Purchase  Price
          (less  the  Escrow  Fund)  in   accordance   with  the  prior  written
          instructions of Seller.

<PAGE>
               6.2.4  Buyer  shall  have   executed  and  delivered  the  Escrow
          Agreement.

               6.2.5 Buyer shall have effected payment of the Escrow Fund.

               6.2.6 The Escrow  Agent  shall have  acknowledged  receipt of the
          Escrow Fund and accepted the same subject to the terms and  conditions
          of the Escrow Agreement.

               6.2.7 Buyer shall have  executed and  delivered the Bill of Sale,
          Assignment and Assumption Agreement.

               6.2.8 Buyer shall have delivered to Seller and VSI a certificate,
          dated the Closing Date, of Buyer's corporate Secretary certifying:

                                  (i)  Resolutions  of its  board  of  directors
                         adopting  and   approving   this   Agreement   and  all
                         transactions   contemplated   hereby  and   authorizing
                         execution  of  this   Agreement   and  the   execution,
                         performance and delivery of all  agreements,  documents
                         and transactions contemplated hereby; and

                                  (ii) The incumbency of its officers  executing
                         this   Agreement  and  all   agreements  and  documents
                         contemplated hereby.

               6.2.9 VSI and Seller shall have  received  from Haynes and Boone,
          LLP,  counsel for Buyer,  an opinion,  dated the Closing  Date, in the
          form attached hereto as Exhibit "E".

               6.2.10 The  approval  and all  consents  from any Third  Party or
          Governmental Body required to consummate the transactions contemplated
          hereby  shall  have  been  obtained  and the  waiting  period  and any
          statutory  extension  thereof  applicable to the  consummation  of the
          transactions  contemplated  by this Agreement  under the HSR Act shall
          have expired or been terminated.

               6.2.11 No  Proceeding  shall have been  instituted  or threatened
          which   questions  the  validity  or  legality  of  the   transactions
          contemplated   hereby  or  any  governmental   consent,   approval  or
          authorization  necessary for the  consummation of the  transactions of
          the transactions contemplated by this Agreement

               6.2.12 As of the Closing, there shall be no effective injunction,
          writ, preliminary  restraining order or any order of any nature issued
          by a court of competent  jurisdiction  directing that the transactions
          provided for herein or any of them not be  consummated  as so provided
          or imposing any  conditions on the  consummation  of the  transactions
          contemplated hereby, which is unduly burdensome on VSI or Seller.

<PAGE>
               6.2.13 VSI, Seller and all guarantors of any bank indebtedness of
          VSI or Seller shall have received a written release  therefrom in form
          and substance satisfactory to VSI, Seller and such guarantors.


7. Termination and Abandonment

     7.1 Reasons for  Termination.  Anything herein or elsewhere to the contrary
notwithstanding,  this  Agreement  may be  terminated  and abandoned at any time
after the date hereof but not later than the Closing:

               7.1.1 by the mutual consent of VSI, Seller and Buyer;

               7.1.2 by Buyer at any time after  January  8,  1999,  if, by that
          date,  the  conditions  set forth in Section 6.1 hereof shall not have
          been fulfilled or waived;

               7.1.3 by VSI and Seller at any time after January 8, 1999, if, by
          that date,  the  conditions  set forth in Section 6.2 hereof shall not
          have been fulfilled or waived;

               7.1.4  by  Buyer  at any  time  prior  to the  later  of (i)  the
          fifteenth  business day after the Delivery Date and (ii) the fifteenth
          business  day after  such later date as Buyer  actually  receives  the
          Preliminary  Schedules  required by Section 1.7 hereof, if the general
          due  diligence  investigation  of VSI and Seller by Buyer  pursuant to
          Section 5.5.1  hereof,  or any Schedule  hereto or any other  document
          delivered to Buyer as  contemplated  hereby,  shall have  revealed any
          facts or circumstances  which, in the reasonable judgment of Buyer and
          regardless of the cause  thereof,  reflect in a material way on VSI or
          Seller;

               7.1.5 by Buyer at any time if there has been a material change in
          VSI or Seller after the date hereof;

               7.1.6 by Buyer or by VSI and Seller at any time if there has been
          a material breach of any  representation or warranty made by the other
          party  herein  or in  any  certificate  or  other  document  delivered
          pursuant hereto or if there has been any failure by the other party to
          perform in all material respects all obligations or to comply with all
          covenants on its part to be performed hereunder; or

               7.1.7 by Buyer or by Seller and VSI if there  shall have been any
          statute,   rule  or  regulation   enacted  or  promulgated  or  deemed
          applicable to the transactions contemplated hereby by any Governmental
          Body that, in the  reasonable  judgment of Buyer or of VSI and Seller,
          as the case may be,  might (i)  result in a  significant  delay in the
          ability of the parties to  consummate  the  transactions  contemplated
          hereby;  (ii) render the parties unable to consummate the transactions
          contemplated  hereby;  (iii) make such consummation  illegal;  or (iv)
          otherwise materially adversely affect VSI or Seller.

<PAGE>
               7.1.8 by Buyer if VSI and Seller  shall  fail to  deliver  one or
          more of the Preliminary Schedules to this Agreement in accordance with
          Section 1.7 hereof or if one or more of the Preliminary Schedules,  as
          delivered,  differs materially from the information concerning VSI and
          Seller  provided by VSI or Seller to Buyer prior to the  execution  of
          this Agreement.

     7.2  Procedure  Upon  and  Effect  of  Termination.  In  the  event  of any
termination  and  abandonment  pursuant to Section 7.1  hereof,  written  notice
thereof  shall  forthwith  be  given to the  other  party  and the  transactions
contemplated hereby shall thereupon be terminated and abandoned, without further
action by Buyer or by VSI and Seller (except for the provisions of Sections 5.6,
5.11 and 5.12  hereof),  and there shall be no  liability  on the part of either
VSI, Seller or Buyer or their  respective  officers,  directors or stockholders,
except for the  provisions  of Sections  5.6, 5.11 and 5.12 hereof or except for
the material breach of any representation, warranty or covenant contained herein
that is within the reasonable control of the party in breach.

8. Miscellaneous

     8.1  Notices.  Any  notice,  consent,  approval,  request,  demand or other
communication required or permitted hereunder must be in writing to be effective
and shall be deemed  delivered  and  received  (i) if  personally  delivered  or
delivered by telecopy with electronic  confirmation,  when actually  received by
the party to whom sent, or (ii) if delivered by mail (whether  actually received
or not), at the close of business on the third  business day next  following the
day when placed in the federal mail,  postage  prepaid,  certified or registered
mail, return receipt requested, addressed as follows:

                If to Buyer:

                HydroChem Industrial Services, Inc.
                5956 Sherry Lane, Suite 930
                Dallas, Texas 75225
                Attention: Chief Executive Officer
                Facsimile No.: (214) 361-4715

<PAGE>

                with a copy to:

                Haynes and Boone, LLP
                600 Congress Avenue, Suite 1600
                Austin, Texas 78701
                Attention: Dennis R. Cassell
                Facsimile No.: (512) 867-8470

                If to Seller or VSI:

                Valley Systems, Inc.
                11580 Lafayette Drive, NW
                Canal Fulton, Ohio 44614
                Attention: Chief Executive Officer
                Facsimile #:  (330) 854-3444

                         with a copy to:

                Arnall Golden & Gregory, LLP
                2800 One Atlantic Center
                1201 West Peachtree Street
                Atlanta, Georgia 30309
                Attention: Jonathan Golden
                Facsimile #: (404) 873-8701

     (or to such other address as any party shall  specify by written  notice so
     given).

     8.2 Binding  Effect;  Benefits.  This  Agreement  shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and  permitted  assigns.   Notwithstanding  anything  contained  herein  to  the
contrary, nothing in this Agreement, expressed or implied, is intended to confer
on any Person (other than the parties hereto,  the Buyer  Indemnitees  (but only
with respect to Section 4 hereof), or their respective  successors and permitted
assigns) any rights, remedies,  obligations or liabilities under or by reason of
this Agreement.

     8.3 Entire Agreement. This Agreement, together with the Exhibits, Schedules
and other documents contemplated hereby, constitute the final written expression
of all of the  agreements  between the parties,  and is a complete and exclusive
statement of those terms. Except as specifically included or referred to herein,
this  Agreement and the Exhibits,  Schedules  and other  documents  contemplated
hereby  supersede all  understandings  and  negotiations  concerning the matters
specified herein. Any representations,  promises,  warranties or statements made
by any party that  differ in any way from the terms of this  written  Agreement,
and the Exhibits,  Schedules and other documents  contemplated  hereby, shall be
given no force or  effect  (except  as  specifically  included  or  referred  to
herein). The parties specifically  represent,  each to the other, that there are

<PAGE>
no additional or supplemental  agreements between them related in any way to the
matters herein contained unless specifically  included or referred to herein. No
addition to or  modification  of any provision  hereof shall be binding upon any
party unless made in writing and signed by all parties.

     8.4  Governing  Law.  THIS  AGREEMENT,  AND ALL  QUESTIONS  RELATING TO ITS
VALIDITY,  INTERPRETATION,   PERFORMANCE  AND  ENFORCEMENT  (INCLUDING,  WITHOUT
LIMITATION,  PROVISIONS  CONCERNING  LIMITATIONS  OF ACTION,  BUT  EXCLUDING THE
PROVISIONS  OF SECTION  5.2 HEREOF AND THE  PROVISIONS  HEREOF  RELATING  TO THE
CORPORATE  GOVERNANCE  OF  SELLER),  SHALL  BE  GOVERNED  BY  AND  CONSTRUED  IN
ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE  (EXCLUSIVE OF THE CONFLICT OF
LAW  PROVISIONS  THEREOF)  APPLICABLE  TO  AGREEMENTS  MADE AND TO BE  PERFORMED
ENTIRELY  WITHIN  SUCH STATE.  THE  PROVISIONS  OF SECTION  5.2 HEREOF  SHALL BE
GOVERNED  BY AND  CONSTRUED  IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF TEXAS
(EXCLUSIVE OF THE CONFLICT OF LAW PROVISIONS  THEREOF)  APPLICABLE TO AGREEMENTS
MADE AND TO BE  PERFORMED  ENTIRELY  WITHIN SUCH STATE.  THE  PROVISIONS  HEREOF
RELATING  TO THE  CORPORATE  GOVERNANCE  OF  SELLER  SHALL  BE  GOVERNED  BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF OHIO.

     8.5  Survival.  All  of  the  terms,  conditions,   covenants,  agreements,
warranties and  representations  contained  herein shall survive,  in accordance
with their terms, the execution  hereof,  the Closing  hereunder and the Closing
Date.

     8.6  Counterparts.  This  Agreement  may  be  executed  in  any  number  of
counterparts,  each of which shall be deemed an original  but all of which shall
constitute one and the same  instrument;  but in making proof of this Agreement,
it  shall  not be  necessary  to  produce  or  account  for  more  than one such
counterpart.  It is not  necessary  that  each  party  hereto  execute  the same
counterpart, so long as identical counterparts are executed by all parties.

     8.7  Headings.  Headings  of the  Sections  of this  Agreement  are for the
convenience  of  the  parties  only,  and  shall  be  given  no  substantive  or
interpretive effect whatsoever.

     8.8 Waivers. VSI and Seller may, by written notice to the Buyer, (i) extend
the time for the performance of any of the obligations or other actions of Buyer
hereunder;  (ii) waive any inaccuracies in the  representations or warranties of
Buyer contained herein or in any document delivered pursuant hereto; (iii) waive
compliance with any of the conditions or covenants of Buyer contained herein; or
(iv) waive performance of any of the obligations of Buyer hereunder.  Buyer may,

<PAGE>
by written notice to VSI and Seller,  (i) extend the time for the performance of
any of the  obligations  or other  actions of each of VSI and Seller  hereunder;
(ii) waive any inaccuracies in the  representations or warranties of each of VSI
and Seller contained herein or in any document delivered pursuant hereto;  (iii)
waive  compliance  with any of the  conditions  or  covenants of each of VSI and
Seller contained  herein; or (iv) waive performance of any of the obligations of
each of VSI and  Seller  hereunder.  Except as  provided  in the  preceding  two
sentences,  no action taken pursuant hereto,  including  without  limitation any
investigation  by or on behalf of any  party,  shall be deemed to  constitute  a
waiver by the party taking such action of compliance  with any  representations,
warranties,  covenants or agreements  contained herein.  The waiver by any party
hereto of a breach of any provision  hereunder shall not operate or be construed
as a waiver of any prior or subsequent breach of the same or any other provision
hereunder.

     8.9  Incorporation  of Exhibits and  Schedules.  All Exhibits and Schedules
attached hereto are by this reference incorporated herein and made a part hereof
for all purposes as if fully set forth herein.

     8.10  Severability.  If for any reason  whatsoever,  any one or more of the
provisions  hereof  shall  be  held  or  deemed  to  be  illegal,   inoperative,
unenforceable or invalid as applied to any particular case or in all cases, such
circumstances  shall not have the effect of rendering  such  provision  illegal,
inoperative,  unenforceable  or invalid in any other case or of rendering any of
the other  provisions  hereof illegal,  inoperative,  unenforceable  or invalid.
Furthermore,  in lieu of each illegal,  invalid,  unenforceable  or  inoperative
provision,  there shall be added  automatically,  as part of this  Agreement,  a
provision  similar  in  terms  of  such  illegal,   invalid,   unenforceable  or
inoperative  provision  as may  be  possible  and  as  shall  be  legal,  valid,
enforceable and operative.

     8.11  Assignability.  Neither this Agreement nor any of the parties' rights
hereunder  shall be  assignable  by any party hereto  without the prior  written
consent of the other  parties  hereto;  provided,  however,  that Buyer's or its
successors'  or  assigns'   rights   hereunder  may  be  assigned  or  otherwise
transferred,  in whole or in part,  without any other party's consent (i) to any
successor by merger or  consolidation  or (ii) to any  individual,  partnership,
corporation  or other  entity  deriving  title from Buyer or its  successors  or
assigns to all or substantially  all of the assets as constituted on the date of
any such transfer,  provided that no such  assignment  shall effect a release of
Buyer  or  its  successors  or  assigns  from  any  liabilities  or  obligations
hereunder.

     8.12  Drafting.  The parties  acknowledge  and  confirm  that each of their
respective  attorneys  have  participated  jointly in the review and revision of
this Agreement and that it has not been written solely by counsel for one party.
The parties hereto  therefore  stipulate and agree that the rule of construction
to the effect  that any  ambiguities  are to be or may be  resolved  against the
<PAGE>

drafting party shall not be employed in the  interpretation of this Agreement to
favor any party against another.

     8.13  References.  The use of the words  "hereof,"  "herein,"  "hereunder,"
"herewith,"  "hereto," "hereby," and words of similar import shall refer to this
entire Amended and Restated Asset Purchase Agreement,  and not to any particular
article,  section,  subsection,  clause, or paragraph hereof, unless the context
clearly indicates otherwise.

     8.14 Calendar Days, Weeks and Months.  Unless otherwise  specified  herein,
any  reference to "day",  "week",  or "month"  herein shall mean a calendar day,
week or month.

     8.15 Gender; Plural and Singular. Where the context hereof so requires, the
masculine  gender shall include the feminine or neuter,  and the singular  shall
include the plural and the plural the singular.

     8.16  Cumulative  Rights.  All rights  and  remedies  specified  herein are
cumulative  and are in addition to, not in limitation of, any rights or remedies
the parties may have at law or in equity,  and all such rights and  remedies may
be exercised singularly or concurrently.

     8.17 No Implied  Covenants.  Each  party,  against  the  other,  waives and
relinquishes  any right to assert,  either as a claim or as a defense,  that the
other party is bound to perform or liable for the  nonperformance of any implied
covenant or implied duty or implied obligation.

     8.18  Attorneys'  Fees.  The  prevailing  party in any dispute  between the
parties  arising out of the  interpretation,  application  or enforcement of any
provision  hereof shall be entitled to recover all of its reasonable  attorney's
fees and costs whether suit be filed or not,  including without limitation costs
and  attorneys'  fees  related  to or  arising  out of any  trial  or  appellate
proceedings.

     8.19 Indirect  Action.  Where any  provision  hereof refers to action to be
taken by any Person or party,  or which such Person or party is prohibited  from
taking,  such  provision  shall be applicable  whether the action in question is
taken directly or indirectly by such Person or party.

                                   * * * * * *


<PAGE>



        IN WITNESS WHEREOF,  the parties have executed this Agreement and caused
the same to be duly  delivered on their  behalf on the day and year  hereinabove
first set forth.


                                 SELLER:
          
                                 VALLEY SYSTEMS OF OHIO, INC.


                                 By:____________________________________________
                                     Ed Strickland
                                     President and Chief Executive Officer
                                     Chief Executive Officer

                                 VSI:

                                 VALLEY SYSTEMS, INC.


                                 By:____________________________________________
                                     Ed Strickland
                                     President and Chief Executive Officer
                                     Chief Executive Officer




                                 BUYER:

                                 HYDROCHEM INDUSTRIAL SERVICES, INC.


                                 By:____________________________________________
                                     B. Tom Carter, Jr.
                                     Chairman of the Board and
                                     Chief Executive Officer

<PAGE>

                                   APPENDIX B

                                ESCROW AGREEMENT

        This Escrow  Agreement,  dated as of  ____________,  1999 (the  "Closing
Date"),  among  HydroChem  Industrial  Services,  Inc.,  a Delaware  corporation
("Buyer"),  Valley Systems, Inc., a Delaware corporation,  and Valley Systems of
Ohio, Inc., an Ohio corporation  (collectively,  "Seller"),  and Bank One Texas,
N.A., a national banking association, as escrow agent ("Escrow Agent").

        This is the  Escrow  Agreement  referred  to in the Second  Amended  and
Restated Asset Purchase  Agreement,  dated as of September 8, 1998, by and among
Buyer and Seller  (the  "Purchase  Agreement").  Capitalized  terms used in this
agreement without definition shall have the respective meanings given to them in
the Purchase Agreement.

        The parties, intending to be legally bound, hereby agree as follows:

1.      ESTABLISHMENT OF ESCROW

                (a)  Buyer  is  depositing  with  Escrow  Agent  the  amount  of
        $4,000,000 in immediately  available funds (as increased by any earnings
        thereon and as reduced by any  disbursements,  amounts  withdrawn  under
        Section  5(j)  hereof,  or losses on  investments,  the "Escrow  Fund").
        Escrow Agent acknowledges receipt thereof.

                (b) Escrow  Agent  hereby  agrees to act as escrow  agent and to
        hold, safeguard,  and disburse the Escrow Fund pursuant to the terms and
        conditions hereof.

2.      INVESTMENT OF FUNDS

        Except as Buyer and Seller may from time to time jointly instruct Escrow
Agent in writing,  the Escrow Fund shall be invested  from time to time,  to the
extent possible,  in United States Treasury Bills having a remaining maturity of
90 days  or less  and  repurchase  obligations  secured  by such  United  States
Treasury  Bills,  with any remainder  being  deposited and  maintained in demand
deposits with Escrow Agent, until disbursement of the entire Escrow Fund. Escrow
Agent is authorized to liquidate in accordance with its customary procedures any
portion of the Escrow Fund  consisting  of  investments  to provide for payments
required to be made under this Agreement.

3.      CLAIMS

                (a) From time to time on or before the third  anniversary of the
        date of this Agreement, Buyer may give notice (a "Notice") to Seller and
        Escrow  Agent  specifying  in  reasonable  detail  the nature and dollar
        amount  of any  Claim  it may  have  under  the  terms  of the  Purchase
        Agreement;  Buyer  may make  more than one  claim  with  respect  to any
        underlying  state of facts.  If Seller  gives notice to Buyer and Escrow
        Agent disputing any Claim (a "Counter  Notice") within ten (10) business
        days  following  receipt by Escrow  Agent of the Notice  regarding  such
        Claim,  such Claim shall be resolved as provided in Section 3(b) hereof.
        If no  Counter  Notice is  received  by  Escrow  Agent  within  such ten
        business day period,  then the dollar amount of damages claimed by Buyer
        as set forth in its Notice shall be deemed  established  for purposes of
        this  Agreement and the Purchase  Agreement  and, at the end of such ten
        business day period,  Escrow Agent shall pay to Buyer the dollar  amount
        claimed in the Notice from (and only to the extent of) the Escrow  Fund.
        Escrow Agent shall not inquire into or consider whether a Claim complies
        with the requirements of the Purchase Agreement.

<PAGE>

                (b) If a Counter Notice is given with respect to a claim, Escrow
        Agent shall make payment with respect  thereto only in  accordance  with
        (i)  joint  written  instructions  of Buyer  and  Seller or (ii) a final
        non-appealable  order of a court of  competent  jurisdiction.  Any court
        order  shall  be  accompanied  by a legal  opinion  by  counsel  for the
        presenting party satisfactory to the Escrow Agent to the effect that the
        order is final and non-appealable.  Escrow Agent shall act on such court
        order without further question.

4.      RELEASE OF ESCROW

                (a)(i) Provided no dispute or disputes in excess of an aggregate
        of $3,000,000 (or $2,000,000, if that part of the Escrow Fund subject to
        Section 4(b) below has been released to Seller),  less the amount of any
        payments  theretofore  made in satisfaction of Seller's  indemnification
        and guaranty  obligations,  exist as to any Claim or Claims by any Buyer
        Indemnitee  against  all or a portion  of the  Escrow  Fund on the first
        anniversary of the Closing Date, then $1,000,000, less the amount of any
        payments  in  satisfaction  of  Seller's  indemnification  and  guaranty
        obligations,  will be  released  to  Seller on the  first  business  day
        following such first anniversary of the Closing Date. To the extent such
        a  dispute  or  disputes  do exist as to a Claim or  Claims on the first
        anniversary  of the Closing  Date, an amount equal to the amount of such
        Claim or Claims (or if the amount of said Claims  cannot be  quantified,
        then  Buyer's  reasonable,  good  faith  estimate  of the  amount of the
        Claims) will be withheld  from such  partial  release of the Escrow Fund
        and will  continue to be held in accordance  with the  provisions of the
        Escrow Agreement until such claim or claims have been fully resolved and
        the balance of the partial release will be paid to Seller.

                (ii)  Provided no dispute or disputes in excess of an  aggregate
        of $2,000,000 (or $1,000,000, if that part of the Escrow Fund subject to
        Section 4(b) below has been released to Seller),  less the amount of any
        payments  theretofore  made in satisfaction of Seller's  indemnification
        and guaranty  obligations,  exist as to any Claim or Claims by any Buyer
        Indemnitee  against  all or a portion of the  Escrow  Fund on the second
        anniversary of the Closing Date, then an additional $1,000,000, less the
        amount of any  payments  theretofore  made in  satisfaction  of Seller's
        indemnification and guaranty obligations,  will be released to Seller on
        the first business day following such second  anniversary of the Closing
        Date. To the extent such a dispute or disputes do exist as to a Claim or
        Claims on the second anniversary of the Closing Date, an amount equal to
        the  amount of such Claim or Claims  (or if the  precise  amount of said
        Claims  cannot  be  quantified,  then  Buyer's  reasonable,  good  faith
        estimate of the amount of the Claims) will be withheld from such partial
        release of the Escrow Fund and will  continue  to be held in  accordance
        with the provisions of the Escrow  Agreement  until such claim or claims
        have been fully resolved and the balance of the partial  release will be
        paid to Seller.
<PAGE>

                (iii)  Provided no dispute or disputes  exist as to any Claim or
        Claims by any Buyer  Indemnitee  against  all or a portion of the Escrow
        Fund on the third anniversary of the Closing Date, then the remainder of
        the Escrow  Fund will be released  to Seller on the first  business  day
        following  such third  anniversary  of the  Closing  Date and the Escrow
        Agreement shall thereupon terminate. To the extent a dispute or disputes
        do exist as to a Claim or Claims on the third anniversary of the Closing
        Date,  an amount  equal to the amount of such Claim or Claims (or if the
        amount of said Claims  cannot be  quantified,  then Buyer's  reasonable,
        good faith  estimate of the amount of the Claims) will be withheld  from
        such partial  release of the Escrow Fund and will continue to be held in
        accordance with the provisions of the Escrow  Agreement until such claim
        or claims  have been  fully  resolved  and the  balance  of the  partial
        release will be paid to Seller.

                (b) Upon  delivery  to  Escrow  Agent  and to Buyer of  Seller's
        certificate  pursuant  to the  terms of  Section  5.3.6 of the  Purchase
        Agreement  certifying  that  the  Environmental   Remediation  has  been
        completed,  an  amount  equal  to  $1,000,000,  less  the sum of (i) the
        aggregate  cost  of  such  Environmental   Remediation   (including  the
        Estimated Additional  Remediation Cost) and (ii) the aggregate amount of
        other Losses of all other Buyer Indemnitees  subject to  indemnification
        pursuant  to  Section  4.1  of  the  Purchase  Agreement  in  excess  of
        $3,000,000,  shall  forthwith  be  released  to Seller out of the Escrow
        Fund. In the event that such Environmental Remediation was not completed
        at the first  anniversary  of the Closing Date,  Seller shall deliver to
        Buyer  a  certificate  of  completion   thereof  upon  such   completion
        containing  a  statement  of the  aggregate  cost  of the  Environmental
        Remediation  effected following such first anniversary,  and Buyer shall
        immediately release to Seller out of the Escrow Fund the amount, if any,
        which would have been  released  to Seller  under  Section  5.3.6 of the
        Purchase  Agreement  following  such first  anniversary  had such actual
        cost, rather than the Estimated  Additional  Remediation Cost, been used
        in such calculation.

5.      DUTIES OF ESCROW AGENT

                (a) Escrow  Agent shall not be under any duty to give the Escrow
        Fund held by it hereunder  any greater  degree of care than it gives its
        own similar  property and shall not be required to invest any funds held
        hereunder  except as directed in this Agreement.  Uninvested  funds held
        hereunder shall not earn or accrue interest.

                (b) Escrow  Agent shall not be liable,  except for its own gross
        negligence  or willful  misconduct  and,  except with  respect to claims
        based  upon  such  gross  negligence  or  willful  misconduct  that  are
        successfully asserted against the Escrow Agent, the other parties hereto
        shall jointly and severally indemnify and hold harmless the Escrow Agent
        (and any  successor  to the Escrow  Agent)  from and against any and all
        losses,  liabilities,  claims, actions, damages and expenses,  including
        reasonable  attorneys'  fees and  disbursements,  arising  out of and in
        connection with this Agreement.  Without limiting the foregoing,  Escrow
        Agent shall in no event be liable in connection  with its  investment or
        reinvestment  of any  cash  held  by it  hereunder  in  good  faith,  in
        accordance with the terms hereof,  including,  without  limitation,  any
        liability  for any delays (not  resulting  from its gross  negligence or
        willful  misconduct)  in the  investment or  reinvestment  of the Escrow
        Fund, or any loss of interest incident to any such delays.

<PAGE>

                (c)  Escrow  Agent  shall be  entitled  to rely upon any  order,
        judgment,  certification,  demand,  notice,  instrument or other writing
        delivered  to it  hereunder  without  being  required to  determine  the
        authenticity  or the  correctness  of any  fact  stated  therein  or the
        propriety  or validity of the service  thereof.  Escrow Agent may act in
        reliance upon any  instrument or signature  believed by it to be genuine
        and may assume that the person  purporting  to give receipt or advice or
        make any  statement  or execute  any  document  in  connection  with the
        provisions  hereof has been duly  authorized  to do so. Escrow Agent may
        conclusively  presume that the undersigned  representative  of any party
        hereto which is an entity other than a natural person has full power and
        authority  to  instruct  Escrow  Agent on  behalf of that  party  unless
        written notice to the contrary is delivered to Escrow Agent.

                (d) Escrow  Agent may act pursuant to the advice of counsel with
        respect to any matter relating to this Agreement and shall not be liable
        for any action taken or omitted by it in good faith in  accordance  with
        such advice.

                (e) Escrow  Agent does not have any  interest in the Escrow Fund
        deposited hereunder but is serving as escrow holder only and having only
        possession  thereof.  Any payments of income from this Escrow Fund shall
        be  subject to  withholding  regulations  then in force with  respect to
        United States taxes.  The parties  hereto will provide Escrow Agent with
        appropriate  Internal  Revenue Service Forms W-9 for tax  identification
        number certification, or non-resident alien certifications. This Section
        5(e)  and  Section  5(b)  hereof  shall  survive   notwithstanding   any
        termination of this Agreement or the resignation of Escrow Agent.

                (f) Escrow  Agent makes no  representation  as to the  validity,
        value,  genuineness,  or the  collectability  of any  security  or other
        document or instrument held by or delivered to it.

                (g) Escrow Agent shall not be called upon to advise any party as
        to the wisdom in selling or retaining or taking or  refraining  from any
        action  with  respect  to any  securities  or other  property  deposited
        hereunder.

                (h) Escrow Agent (and any  successor to the Escrow Agent) may at
        any time resign as such by  delivering  the Escrow Fund to any successor
        Escrow Agent jointly  designated by the other parties hereto in writing,
        or to any court of competent jurisdiction,  whereupon Escrow Agent shall
        be  discharged  of and from any and all further  obligations  arising in
        connection  with this  Agreement.  The  resignation of Escrow Agent will
        take effect on the earlier of (a) the appointment of a successor  escrow
        agent (including a court of competent jurisdiction) or (b) the day which
        is 30  days  after  the  date  of  delivery  of its  written  notice  of
        resignation  to the other parties  hereto.  If at that time Escrow Agent
        has not  received a  designation  of a successor  Escrow  Agent,  Escrow
        Agent's  sole  responsibility  after  that time  shall be to retain  and
        safeguard the Escrow Fund until  receipt of a  designation  of successor
        Escrow Agent or a joint  written  disposition  instruction  by the other
        parties hereto or a final  non-appealable  order of a court of competent
        jurisdiction.

<PAGE>

                (i) In the event of any  disagreement  between the other parties
        hereto  resulting in adverse  claims or demands being made in connection
        with the Escrow Fund or in the event that Escrow Agent is in doubt as to
        what action it should take hereunder,  Escrow Agent shall be entitled to
        retain the Escrow  Fund until  Escrow  Agent shall have  received  (i) a
        final  non-appealable  order  of  a  court  of  competent   jurisdiction
        directing  delivery  of the  Escrow  Fund  or (ii) a  written  agreement
        executed by the other parties  hereto  directing  delivery of the Escrow
        Fund,  in which event  Escrow  Agent shall  disburse  the Escrow Fund in
        accordance  with  such  order or  agreement.  Any court  order  shall be
        accompanied  by a legal  opinion by  counsel  for the  presenting  party
        satisfactory  to Escrow  Agent to the effect that the order is final and
        non-appealable.  Escrow  Agent  shall act on such court  order and legal
        opinion without further question.

                (j) Buyer and Seller  shall pay Escrow  Agent  compensation  (as
        payment  in full)  for the  services  to be  rendered  by  Escrow  Agent
        hereunder  in the  amount  of $2,500  at the time of  execution  of this
        Agreement and $2,500 annually  thereafter and agree to reimburse  Escrow
        Agent for all reasonable  expenses,  disbursements and advances incurred
        or  made  by  Escrow  Agent  in  performance  of  its  duties  hereunder
        (including  reasonable fees, expenses and disbursements of its counsel).
        Any  such  compensation  and  reimbursement  to  which  Escrow  Agent is
        entitled shall be evenly split by Buyer and Seller.

                (k) No  printed  or other  matter  in any  language  (including,
        without  limitation,  prospectuses,  notices,  reports  and  promotional
        material) that mentions  Escrow Agent's name or the rights,  powers,  or
        duties of Escrow Agent shall be issued by the other parties hereto or on
        such  parties'  behalf  unless  Escrow  Agent shall first have given its
        specific written consent thereto.

                (l) The other parties  hereto  authorize  Escrow Agent,  for any
        securities  held  hereunder,  to use the  services of any United  States
        central   securities   depository  it  reasonably   deems   appropriate,
        including,  without  limitation,  the  Depositary  Trust Company and the
        Federal Reserve Book Entry System.

6.      LIMITED RESPONSIBILITY

This Agreement  expressly sets forth all the duties of Escrow Agent with respect
to any and all matters  pertinent hereto. No implied duties or obligations shall
be read into this  Agreement  against  Escrow  Agent.  Escrow Agent shall not be
bound by the  provisions of any agreement  among the other parties hereto except
this Agreement.

7.      OWNERSHIP FOR TAX PURPOSES

Seller  agrees  that,  for  purposes of federal and other taxes based on income,
Seller  will be treated as the owner of the Escrow  Fund,  and that  Seller will
report all income,  if any, that is earned on, or derived from,  the Escrow Fund
as its  income in the  taxable  year or years in which such  income is  properly
includible and pay any taxes attributable thereto.

<PAGE>

8.      NOTICES

All notices,  consents,  waivers and other  communications  under this Agreement
must be in writing and will be deemed to have been duly given when (a) delivered
by hand (with written  confirmation  of receipt),  (b) sent by telecopier  (with
written confirmation of receipt), or (c) when received by the addressee, if sent
by a nationally  recognized overnight delivery service (receipt  requested),  in
each case to the  appropriate  addresses and telecopier  numbers set forth below
(or to such other  addresses and telecopier  numbers as a party may designate by
notice to the other parties):

        Seller:

        Valley Systems, Inc.
        Valley Systems of Ohio, Inc.
        11580 Lafayette Drive, NW
        Canal Fulton, Ohio 44614
        Attention: Chief Executive Officer
        Facsimile No.: (330) 854-3444

        with a copy to:

        Arnall Golden & Gregory, LLP
        2800 One Atlantic Center
        1201 West Peachtree Street
        Atlanta, Georgia 30309
        Attention: Jonathan Golden
        Facsimile No.: (404) 873-8701

        Buyer:

        HydroChem Industrial Services, Inc.
        5956 Sherry Lane
        Suite 930
        Dallas, Texas 75225
        Attention: Chief Executive Officer
        Facsimile No.: (214) 361-4715

<PAGE>

        with a copy to:

        Haynes and Boone, LLP
        600 Congress Avenue
        Suite 1600
        Austin, Texas 78701
        Attention: Dennis R. Cassell
        Facsimile No.:  (512) 867-8470


        Escrow Agent:

        Bank One Texas, N.A.
        910 Travis Street
        5th Floor
        Houston, Texas  77002
        Attention:  Josie Hixon
        Facsimile No.:  (713) 751-3930

9.      JURISDICTION; SERVICE OF PROCESS

Any action or  proceeding  seeking to enforce any  provision of, or based on any
right arising out of, this  Agreement may be brought  against any of the parties
in the  courts  of the State of Texas,  County of  Dallas,  or, if it has or can
acquire  jurisdiction,  in the United  States  District  Court for the  Northern
District of Texas,  and each of the parties consents to the jurisdiction of such
courts  (and  of the  appropriate  appellate  courts)  in  any  such  action  or
proceeding and waives any objection to venue laid therein. Process in any action
or proceeding  referred to in the preceding  sentence may be served on any party
anywhere in the world.

10.     COUNTERPARTS

This Agreement may be executed in one or more  counterparts,  each of which will
be deemed to be an  original  and all of which,  when  taken  together,  will be
deemed to constitute one and the same.

11.     SECTION HEADINGS

The headings of sections in this Agreement are provided for convenience only and
will not affect its construction or interpretation.

12.     WAIVER

The rights and remedies of the parties to this  Agreement are cumulative and not
alternative.  Neither the failure nor any delay by any party in  exercising  any
right,  power, or privilege under this Agreement or the documents referred to in
this Agreement will operate as a waiver of such right, power, or privilege,  and
no single or partial  exercise  of any such  right,  power,  or  privilege  will

<PAGE>

preclude any other or further exercise of such right, power, or privilege or the
exercise  of any  other  right,  power,  or  privilege.  To the  maximum  extent
permitted by applicable law, (a) no claim or right arising out of this Agreement
or the documents  referred to in this  Agreement can be discharged by one party,
in whole or in part, by a waiver or renunciation of the claim or right unless in
writing  signed by the other  party;  (b) no waiver that may be given by a party
will be applicable  except in the specific  instance for which it is given;  and
(c) no notice  to or  demand  on one party  will be deemed to be a waiver of any
obligation  of such  party or of the right of the party  giving  such  notice or
demand to take  further  action  without  notice or demand as  provided  in this
Agreement or the documents referred to in this Agreement.

13.     EXCLUSIVE AGREEMENT AND MODIFICATION

This Agreement supersedes all prior agreements among the parties with respect to
its subject matter and constitutes (along with the documents referred to in this
Agreement) a complete  and  exclusive  statement  of the terms of the  agreement
between the parties with respect to its subject  matter.  This Agreement may not
be amended except by a written  agreement  executed by the Buyer, the Seller and
the Escrow Agent.

14.     GOVERNING LAW

This  Agreement  shall be  governed  by the laws of the State of Texas,  without
regard to conflicts of law principles.

                                  * * * * * *

<PAGE>


        IN WITNESS  WHEREOF,  the  parties  have  executed  and  delivered  this
Agreement as of the date first written above.


HYDROCHEM INDUSTRIAL                 VALLEY SYSTEMS, INC.
SERVICES, INC.


By:______________________________     By:_________________________________
   B. Tom Carter, Jr.                   Ed Strickland
   Chairman of the Board and            President and Chief Executive Officer
   Chief Executive Officer


BANK ONE TEXAS, N.A.                  VALLEY SYSTEMS OF OHIO, INC.


By:______________________________     By:_________________________________
Name:                                    Ed Strickland
Title:                                   President and Chief Executive  Officer


<PAGE>
                                                    -6-

                                   APPENDIX C

                       PLAN OF LIQUIDATION AND DISSOLUTION
                             OF VALLEY SYSTEMS, INC.

         WHEREAS,  the Board of Directors (the "Board") of Valley Systems,  Inc.
(the  "Company"),  a  Delaware  corporation,  has deemed it  advisable  that the
Company  be  dissolved  and  has  approved  and  determined  that  this  Plan of
Liquidation and  Dissolution of Valley Systems,  Inc. (this "Plan") is advisable
and in the best interests of the stockholders of the Company; and

         WHEREAS,  the Board has  directed  that this Plan be  submitted  to the
holders of the outstanding  shares of the Company's common stock, par value $.01
per share (the "Common Stock"), and Series C Preferred Stock for their approval,
which stockholder approval has been obtained by written consent rather than at a
meeting of stockholders of the Company,  in accordance with the  requirements of
the Delaware General Corporation Law (the "DGCL") and the Company's  Certificate
of  Incorporation,  and the Board has  authorized the filing with the Securities
and Exchange  Commission (the "SEC") and the  distribution to stockholders of an
information statement (the "Information  Statement") in connection with the sale
of  substantially  all of the  assets  of the  Company  and of its  wholly-owned
subsidiary,  Valley  Systems of Ohio,  Inc.,  an Ohio  corporation  ("VSO"),  to
HydroChem Industrial Services, Inc., a Delaware corporation  ("HydroChem"),  and
the  assumption  by HydroChem of the  Company's  and VSO's bank debt and certain
other  liabilities  (the  "Sale")  pursuant to that certain  Second  Amended and
Restated Asset Purchase  Agreement  (the  "Agreement")  dated as of September 8,
1998 and that  certain  Escrow  Agreement  dated as of  September  8,  1998 (the
"Escrow Agreement"); and

         WHEREAS, upon the closing of the Sale pursuant to the Agreement and the
release of all funds held  pursuant to the Escrow  Agreement,  the Company shall
voluntarily  dissolve in accordance  with the DGCL upon the terms and conditions
set forth below;

         WHEREAS,  all  capitalized  terms used  herein  that are defined in the
Agreement have the meaning assigned to such terms therein;

         NOW,  THEREFORE,  the Board  hereby  adopts and sets forth this Plan of
Liquidation and Dissolution of Valley Systems, Inc. in accordance with the DGCL,
as follows:

         Section 1.  Effective Date of Plan.

         The  effective  date of this Plan (the  "Effective  Date") shall be the
first  business day following the Closing Date.  After the Effective  Date,  the
Company shall begin the process of  liquidating  the Company in accordance  with
the terms and conditions of this Plan; provided,  however that the Company shall
not be dissolved until the first business day following the third anniversary of
the Closing Date; provided,  further,  however, that if on the third anniversary
of the Closing Date, any pending  disputes exist  affecting the  disbursement of
any amounts held  pursuant to the Escrow  Agreement,  the  dissolution  shall be
postponed until such disputes have been fully resolved.

<PAGE>

         Section 2. Cessation of Business Activities.

         After the Effective  Date, the Company shall not engage in any business
activities  except for the purposes of (i) prosecuting or defending  lawsuits by
or against the Company,  (ii) enabling the Company to gradually settle and close
its business, dispose of and convey its property, discharge liabilities and wind
up its business  affairs,  (iii) complying with applicable laws, (iv) performing
pursuant to the Escrow  Agreement and the Agreement,  and (v)  distributing  its
remaining  assets,  if any, in accordance with this Plan. The Board of Directors
of the Company and, at their  pleasure,  the officers,  shall continue in office
solely for these purposes and as otherwise provided in this Plan.

         Section 3.  Liquidation of Assets.

         Substantially  all of the Company's  assets and the assets of VSO shall
be sold in accordance with the terms of the Agreement. After the Effective Date,
the Company shall cause the liquidation of its remaining  assets to cash as soon
as is practicable  consistent  with the terms of this Plan,  upon such terms and
conditions as the Board deems expedient and in the best interests of the Company
and its  stockholders,  without  any  further  vote or action  by the  Company's
stockholders.

         Section 4.  Payment of Debts.

         Prior to making any distribution to the holders of the Company's Common
Stock, the Company shall pay or make reasonable provision for the payment of all
known  or  ascertainable  liabilities  of the  Company,  including  all  amounts
estimated  by the  Board  to be  necessary,  appropriate  or  desirable,  in its
absolute discretion, for the payment of estimated expenses, taxes and contingent
liabilities  (including expenses of dissolution,  liquidation and termination of
the Company's  existence).  Further,  the Company shall make such provision,  as
determined  by the  Board,  as will be  reasonably  likely to be  sufficient  to
provide  compensation for claims that have not been made known to the Company or
that have not arisen, but that, based on facts known to the Company,  are likely
to arise or to become  known to the  Company  within 10 years  after the date of
dissolution.

         On the  Effective  Date,  the Company  shall  establish  a  contingency
reserve (the "Contingency  Reserve")  containing  approximately  $3.8 million in
cash to account for unknown events, claims, contingencies, expenses incurred and
the  liquidation  and  dissolution  provided  for in this  Plan.  Following  the
Effective  Date, if and to the extent  deemed  necessary or  appropriate  by the
Board, the Company may set aside in the Contingency  Reserve  additional amounts
of cash or property. Following the payment,  satisfaction or other resolution of
all such events,  claims,  contingencies and expenses,  any amounts remaining in
the Contingency Reserve shall be distributed in accordance with this Plan out of
funds legally available therefor.

<PAGE>
          Section 5. Series C Preferred Stock Liquidation Preference; Redemption
     of Stock Options and Retention Bonus

         In  addition,  prior to making any  distribution  to the holders of the
  Common  Stock,  the Company  shall,  to the extent that  sufficient  funds are
  available,  (i)  distribute  to  Rollins  Holding  Company,  Inc.,  a Delaware
  corporation  ("Rollins"),  its  liquidation  preference  for all of the 55,000
  shares of the Company's Series C Preferred Stock at par value ($100 per share)
  currently  held by Rollins (the  "Preferred  Stock") plus any accrued,  unpaid
  dividends on such shares in consideration of Rollins'  interest in such shares
  (collectively,  the  "Preferred  Liquidation  Amount"),  (ii) redeem all stock
  options  still  outstanding  under the  Company's  1991 Stock Option Plan (the
  "1991 Plan") or outside the 1991 Plan as of the  Effective  Date for an amount
  equal,  with respect to each option,  to the product  obtained by taking $2.50
  (which  amount the Board has  determined  to be the fair  market  value of one
  outstanding share of Common Stock) minus the exercise price of each option and
  multiplying it by the number of common shares that, at the Effective Date, are
  covered by any portion of such stock  options  which has not  previously  been
  exercised or become void under the terms of the stock option  agreements under
  which such options were granted to the option  holder  (regardless  of whether
  such common  shares are vested or  nonvested  under the terms of the 1991 Plan
  and/or such stock option agreement at the Effective Date); provided,  however,
  that no such offer shall be made to holders of options with an exercise  price
  greater than or equal to $3.00 per share,  and (iii) pay a retention  bonus to
  certain  officers and employees,  to be determined in the Board's  discretion,
  who remain as officers or employees of the Company  through the Effective Date
  an aggregate amount of approximately  $165,000.  In the event that the Company
  lacks  sufficient  funds to pay the  Preferred  Liquidation  Amount,  it shall
  distribute to Rollins all of its  remaining  property and assets on account of
  the Preferred Stock until the liquidation  preference on such shares ($100 per
  share) is satisfied and any accrued, unpaid dividends on such shares are paid.

         Section 6.  Distributions to Common Stockholders.

         Following the payment or the provision for the payment of the Company's
claims and  obligations as provided in Section 4, and the payment in full of the
Preferred  Liquidation  Amount,  redemption  of the stock options under the 1991
Plan or outside such plan and the payment of the retention  bonus as provided in
Section 5, the Company  shall  distribute to the holders of the Common Stock all
of its remaining  property and assets, if any (the  "Liquidation  Distribution")
other than amounts held  pursuant to the Escrow  Agreement  out of funds legally
available therefor. The Liquidation  Distribution may be made in one or a series
of distributions  and is intended to be made in cash, in such manner and at such
time or times as the Board, in its absolute discretion, may determine.

         Prior to the Effective  Date, the Company and HydroChem will enter into
the Escrow  Agreement,  pursuant to which HydroChem will, at the Effective Date,
deposit $4 million  into an escrow  account.  As  escrowed  funds,  if any,  are
released to the Company pursuant to the Escrow Agreement,  they will be utilized

<PAGE>
to pay any unpaid  expenses,  with the remainder to be distributed to the common
stockholders as provided in this Plan.

         Section 7.  Certificate of Dissolution.

         At  such  time  as  the  Board  has   determined   that  all  necessary
requirements  for  dissolution  have been satisfied  under Delaware law and this
Plan,  the  appropriate  officers of the Company  shall  execute and cause to be
filed with the  Secretary  of the State of  Delaware,  and  elsewhere  as may be
required or deemed appropriate,  such documents as may be required to effectuate
the  dissolution  of  the  Company,   including  a  Certificate  of  Dissolution
conforming to the  requirements of Section 275 of the DGCL (the  "Certificate of
Dissolution").  From and after  the date  such  documents  are  accepted  by the
Secretary of the State of Delaware,  the Company will be deemed to be completely
dissolved,  but will  continue to exist under  Delaware  law for the purposes of
paying, satisfying and discharging any existing debts or obligations, collecting
and distributing its assets,  and doing all other acts required to liquidate and
wind up the Company's  business  affairs.  The members of the Board in office at
the time the  Certificate of Dissolution is accepted for filing by the Secretary
of the State of Delaware shall be deemed to be trustees of the remaining  assets
of the  Company  for the  purposes  of  liquidation  and shall  have all  powers
provided to them under the DGCL and other  applicable law. After the Certificate
of Dissolution is filed with the Secretary of the State of Delaware, the Company
will not hold any further annual meetings of stockholders.

         Section 8.  Powers of Board and Officers.

         The Board and the  officers of the Company  are  authorized  to approve
such  changes to the terms of any of the  transactions  referred  to herein,  to
interpret any of the provisions of this Plan,  and to make,  execute and deliver
such other agreements,  conveyances,  assignments,  transfers,  certificates and
other  documents and take such other action as the Board and the officers of the
Company deem necessary or desirable in order to carry out the provisions of this
Plan and effect the  complete  liquidation  and  dissolution  of the  Company in
accordance with the IRC and the DGCL and any rules and regulations of the SEC or
any state securities commission,  including, without limitation, any instruments
of dissolution or other documents,  and withdrawing any qualification to conduct
business  in any  state in which the  Company  is so  qualified,  as well as the
preparation and filing of any tax returns.

         After the Certificate of Dissolution is filed with the Secretary of the
State of Delaware, the death,  resignation,  or other disability of any director
or officer of the Company  shall not impair the  authority  of the  surviving or
remaining  director(s) or officer(s) to exercise any of the powers  provided for
in this Plan. Upon such death, resignation or other disability, the surviving or
remaining director(s), or, if there are none, to the extent permitted by law the
surviving or remaining  officer(s),  shall have authority to fill the vacancy or
vacancies so created,  but the failure to fill such  vacancy or vacancies  shall
not impair the authority of the surviving or remaining director(s) or officer(s)
to exercise any of the powers provided for in this Plan.

<PAGE>
         Section 9.  Cancellation of Stock.

         The  final   distribution   made  under  this  Plan  to  the  Company's
stockholders  shall be in complete  redemption  and  cancellation  of all of the
outstanding   Common  Stock.  As  a  condition  to  disbursement  of  the  final
distribution  under this Plan, the Board may require  stockholders  to surrender
their  certificates  evidencing the Company's Common Stock to the Company or its
agent for  cancellation.  If a  stockholder's  certificate  for shares of Common
Stock has been lost, stolen or destroyed, such stockholder may be required, as a
condition to the  disbursement  of the final  distribution  under this Plan,  to
furnish to the Company  satisfactory  evidence of the loss, theft or destruction
thereof,  together with a surety bond or other security or indemnity  reasonably
satisfactory to the Company.

         Section 10. Record Date and Restrictions on Transfer of Shares.

         Upon  the  filing  and  acceptance  of  the  Company's  Certificate  of
Dissolution  by the Secretary of the State of Delaware,  the Company shall close
its stock transfer books and  discontinue  recording  transfers of the Company's
Common Stock at the close of business on the date the Certificate of Dissolution
is accepted (the "Record Date"),  and thereafter  certificates  representing the
Common Stock shall not be assignable or transferable on the books of the Company
except by will,  intestate  succession  or operation  of law. The  proportionate
interests of all of the  stockholders of the Company shall be fixed on the basis
of their  respective  stockholdings at the close of business on the Record Date,
and, after the Record Date, any distributions  made by the Company shall be made
solely to the stockholders of record at the close of business on the Record Date
except as may be necessary to reflect subsequent transfers recorded on the books
of the Company as a result of any assignments by will,  intestate  succession or
operation of law.

         Section 11. Missing Stockholders.

         If any  Liquidation  Distribution  to a  stockholder  cannot  be  made,
whether  because  the  stockholder  cannot be  located,  has not  surrendered  a
certificate evidencing the Common Stock as may be required hereunder, or for any
other reason,  then the distribution to which such stockholder is entitled shall
(unless  transferred to the trust established  pursuant to Section 12 hereof) be
transferred to and deposited with the appropriate  state official  authorized by
the laws of the appropriate state to receive the proceeds of such  distribution.
The  proceeds  of such  distribution  shall  thereafter  be held  solely for the
benefit  of and for  ultimate  distribution  to  such  stockholder  as the  sole
equitable owner thereof and shall escheat to the appropriate state or be treated
as abandoned  property in accordance with the laws of the appropriate  state. In
no event  shall the  proceeds of any such  distribution  revert to or become the
property of the Company.

         Section 12. Liquidating Trust.

         If  advisable   for  any  reason  to  complete  the   liquidation   and
distribution  of the  Company's  assets  to its  stockholders,  the Board may at
anytime  transfer to a liquidating  trust (the "Trust") the remaining  assets of

<PAGE>
the Company.  The Trust  thereupon  shall  succeed to all of the then  remaining
assets of the Company, including all amounts in the Contingency Reserve, and any
remaining  liabilities and  obligations of the Company.  The sole purpose of the
Trust  shall be to  prosecute  and defend  suits by or against the  Company,  to
settle  and close the  business  of the  Company,  to  dispose of and convey the
assets of the Company,  to satisfy the remaining  liabilities and obligations of
the  Company  and to  distribute  the  remaining  assets of the  Company  to its
stockholders.  Any distributions made from the Trust shall be made in accordance
with the provisions of this Plan. The Board may appoint one or more  individuals
or corporate persons to act as trustee or trustees of the Trust and to cause the
Company  to enter  into a  liquidating  trust  agreement  with such  trustee  or
trustees on such terms and conditions as the Board determines.  Approval of this
Plan by the  stockholders  also will constitute the approval by the stockholders
of any  appointment  of the  trustees  and of the  liquidating  trust  agreement
between the Company and such trustees.

         Section 13. Compensation.

         The Company may pay to the Company's  directors  and agents,  or any of
them,  compensation for services rendered in connection with the  implementation
of this Plan.  Further,  if deemed advisable by the Board, the Company may pay a
"wind-down"   consultant  reasonable   compensation  for  services  rendered  in
connection with the liquidation and dissolution of the Company. Approval of this
Plan by the  stockholders  of the Company shall  constitute  the approval of the
stockholders of the payment of any such compensation referred to in this Section
13.

         Section 14. Indemnification.

         After the Certificate of Dissolution is filed with the Secretary of the
State of  Delaware,  the Company  shall  continue  to  indemnify  its  officers,
directors,   employees  and  agents  in  accordance   with  its  Certificate  of
Incorporation,  by-laws and any contractual arrangements as therein or elsewhere
provided,  and such  indemnification  shall apply to acts or  omissions  of such
persons in connection with the implementation of this Plan and the winding up of
the affairs of the Company.  The Company's  obligation to indemnify such persons
may be satisfied out of the Contingency  Reserve or out of assets transferred to
the Trust,  if any.  The Board and the trustees of any Trust are  authorized  to
obtain  and  maintain  insurance  as may be  necessary  to cover  the  Company's
indemnification obligations.

         Section 15. Costs.

         The Company is  authorized,  empowered  and  directed to pay all legal,
accounting, printing and other fees, costs and expenses for services rendered to
the Company in connection with the preparation,  adoption and  implementation of
this Plan, including, without limitation, any such fees and expenses incurred in
connection with the preparation of filings with the SEC.




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