ENVIRONMENTAL REMEDIATION HOLDING CORP
SC 13D, 1999-09-16
OIL & GAS FIELD SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. __)*


                  Environmental Remediation Holding Corporation
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                    Common Stock, par value $.0001 per share
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    29406V100
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                               John G. Igoe, Esq.
                              Edwards & Angell, LLP
                          250 Royal Palm Way, Suite 300
                            Palm Beach, Florida 33480
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                 August 6, 1999
- --------------------------------------------------------------------------------
             (Date of Event which Requires Filing of This Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
[ ].

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 (the "Act") or otherwise  subject to the liabilities of that section of the
Act but shall be subject to all other  provisions of the Act  (however,  see the
Notes).



<PAGE>


1        Names of Reporting Persons
         S.S. or I.R.S. Identification Nos. of Above Persons

         Howard D. Talks
- --------------------------------------------------------------------------------
2        Check the Appropriate Box if a Member of a Group (See Instructions)
                                                          (a)      [   ]
                                                          (b)      [ X ]
- --------------------------------------------------------------------------------
3        SEC Use Only

- --------------------------------------------------------------------------------
4        Source of Funds (See Instructions)

         Not Applicable.
- --------------------------------------------------------------------------------
5        Check if Disclosure of Legal  Proceedings is Required Pursuant to Items
         2(d) or 2(e)

         Not Applicable.
- --------------------------------------------------------------------------------
6        Citizenship or Place of Organization

         United States of America.
- --------------------------------------------------------------------------------
                      7      Sole Voting Power
     Number of

       Shares                1,427,500
                      ----------------------------------------------------------
    Beneficially      8      Shared Voting Power

      Owned by              ---------------------
                      ----------------------------------------------------------
        Each          9      Sole Dispositive Power

     Reporting
                             1,427,500
       Person
                      ----------------------------------------------------------
        With          10     Shared Dispositive Power


                            ----------------------
- --------------------------------------------------------------------------------
11       Aggregate Amount Beneficially Owned by Each Reporting Person

         1,427,500
- --------------------------------------------------------------------------------
12       Check if the Aggregate  Amount in Row (11) Excludes Certain Shares (See
         Instructions) [ ]

         Not Applicable.
- --------------------------------------------------------------------------------
13       Percent of Class Represented by Amount in Row (11)

         Approximately  .29%
- --------------------------------------------------------------------------------
14       Type of Reporting Person (See Instructions)

         IN
- --------------------------------------------------------------------------------

         This Schedule 13D is filed by Howard D. Talks (the "Reporting  Person")
on his behalf. The information disclosed relates to information disclosed by Mr.
Talks,  ERHC Investment Group LLC, ERHC Investment Group II LLC, ERHC Investment
Group A LLC, Samoa LLC, Ernest D. Chu, Rene  Eichenberger,  Daniel Levin,  Gregg
Srinivasan  and Noreen G. Wilson (the  "Group") in Schedule 13D filed on May 21,
1999 (the "May 1999 Schedule 13D"). Mr. Talks is not filing this Schedule 13D on
behalf of any other member of the Group.  The information  herein is intended to
supplement  and modify any  information  included in the May 1999  Schedule  13D
which relates to Mr. Talks.  Capitalized terms not defined herein shall have the
meanings  given  those  terms in the May 1999  Schedule  13D, a copy of which is
attached hereto as Exhibit 1.

          This Schedule 13D is filed to disclose:  (i) to Mr.  Talks'  knowledge
and  belief,  notice  by the  Issuer of  breach  of the  Letter  of  Intent  and
termination of the Letter of Intent by the Issuer; (ii) notice of the withdrawal
of Mr.  Talks and ERHC  Investment  Group Inc.  ("Investment  Group  Inc.") from
involvement in the Letter of Intent and in the transactions  contemplated by the
Letter of Intent  relating to the proposed  purchase of Shares of  Environmental
Remediation  Holding  Corporation  ("Issuer") and the objection of the Issuer to
such notice; (iii) the withdrawal of Mr. Talks and Investment Group Inc. as part
of the Group described in the May 1999 Schedule 13D; (iv) the resignation of Mr.
Talks as managing member of Investment  Group I and Investment  Group II and the
replacement of Mr. Talks as managing member of Investment Group I and Investment
Group II by Ernest  D.  Chu;  and (v) that Mr.  Talks is no  longer  seeking  to
acquire  the  Shares or gain  control  of Issuer or to  thereafter  replace  its
existing board of directors and executive officers.

Item  1.   Security and Issuer

         This statement  relates to the common stock, par value $.0001 per share
(the "Common  Stock"),  of  Environmental  Remediation  Holding  Corporation,  a
corporation organized under the laws of the State of Colorado ("Issuer"),  whose
principal  executive  offices are located at 16101 La Grande  Drive,  Suite 100,
Little Rock, Arkansas 72223.

Item  2.   Identity and Background

         This  statement  is filed on behalf of Howard D. Talks,  an  individual
citizen of the United States of America ("Reporting  Person").  Mr. Talks is the
former sole managing member of each of Investment  Group I and Investment  Group
II and has been replaced as managing member by Ernest D. Chu. Mr. Talks' present
principal  occupation is as an investor,  and his principal  business address is
c/o Corporate  Builders,  515 North Flagler  Drive,  Suite 120, West Palm Beach,
Florida 33401.

           During the last five years,  the Reporting  Person has not been:  (i)
convicted in a criminal  proceeding  (excluding  traffic  violations  or similar
misdemeanors),  or  (ii)  a  party  to  a  civil  proceeding  of a  judicial  or
administrative body of competent jurisdiction and as a result of such proceeding
was or is  subject  to a  judgment,  decree,  or final  order  enjoining  future
violations  of, or prohibiting  or mandating  activities  subject to, federal or
state securities laws, or finding any violation with respect to such laws.

Item  3.   Source and Amount of Funds or other Consideration

           Not Applicable.

Item  4.   Purpose of Transaction

           As  previously  reported in the May 1999 Schedule 13D, the purpose of
the transactions contemplated by the Letter of Intent, as assigned by Investment
Group Inc. to Investment  Group I, Investment  Group II and Investment  Group A,
was for  Investment  Group  I,  Investment  Group II and  Investment  Group A to
acquire  the Shares  and  thereby  acquire  control  of  Issuer.  Mr.  Talks and
Investment Group Inc. notified the Issuer that they withdrew from and terminated
their  involvement and  obligations,  if any, in the Letter of Intent and in the
transactions  contemplated in the Letter of Intent.  The Issuer objected and did
not accept the withdrawal claiming that Mr. Talks was obligated under the Letter
of Intent and observing that the rights and obligations of Investment Group Inc.
had been  assigned to Investment  Group I,  Investment  Group II and  Investment
Group A.

           To the knowledge and belief of Mr. Talks, on or about August 6, 1999,
the Issuer notified Investment Group I, Investment Group II and Investment Group
A that they were in breach of the Letter of Intent and the Issuer terminated the
Letter of Intent.

           While Mr.  Talks  still  holds his  profits  interest  as a member of
Investment  Group I and  Investment  Group II, to his knowledge and belief,  the
Group has terminated its existence as a group and is no longer acting in concert
as a group.  Mr. Talks is no longer seeking to acquire Shares or to gain control
of the Issuer or to  thereafter  replace its  existing  board of  directors  and
executive officers.

           Except as indicated above or elsewhere  herein,  the Reporting Person
has no present  plans or  proposals  (although  it reserves the right to develop
such plans or proposals in the future) which relate to or would result in:

           a. The acquisition by any person of additional  securities of Issuer,
           or the disposition of securities of Issuer;

           b.  An  extraordinary  corporate  transaction,   such  as  a  merger,
           reorganization  or  liquidation,  involving  Issuer  or  any  of  its
           subsidiaries;

           c. A sale or transfer of a material amount of assets of Issuer or any
           of its subsidiaries;

           d. Any change in the present  board of  directors  or  management  of
           Issuer, including any plans or proposals to change the number or term
           of directors or to fill any existing vacancies on the board;

           e. Any  material  change in the  present  capitalization  or dividend
           policy of Issuer;

           f. Any  other  material  change in  Issuer's  business  or  corporate
           structure;

           g. Changes in Issuer's charter,  bylaws or instruments  corresponding
           thereto or other actions which may impede the  acquisition of control
           of Issuer by any person;

           h.  Causing a class of  securities  of Issuer to be  delisted  from a
           national  securities  exchange  or to  cease to be  authorized  to be
           quoted in an inter-dealer quotation  system of a registered  national
           securities association;

           i. A class of equity  securities of the Issuer becoming  eligible for
           termination of registration  pursuant to Section 12(g)(4) of the Act;
           or

           j. Any action similar to any of those enumerated above.

ITEM  5. Interest in Securities of the Issuer

         Based upon  information  obtained from Issuer's most recent filing with
the  Commission  filed on August 24,  1999 the total  number of shares of Common
Stock  issued  and  outstanding  as of August  12,  1999,  was  495,229,675.  In
addition,  Mr.  Talks is the direct or  indirect  beneficial  owner of a further
1,427,500 shares of Common Stock  representing  .29% percent of the total number
of shares of Common Stock issued and outstanding as of August 12, 1999.

           The Reporting  Person has not effected any  transaction in the Common
Stock during the past sixty days.

ITEM 6.   Contracts, Arrangements, Understandings or Relationships with Respect
          to Securities of the Issuer

           The  Reporting  Person is not a party to any  contract,  arrangement,
understanding,  or relationship  required to be described  pursuant to Item 6 of
Schedule 13D.

ITEM  7.   Material To Be Filed as Exhibits

           Exhibit 1. Schedule  13D filed May 21,  1999 by Mr.  Talks,  ERHC
                      Investment  Group LLC, ERHC Investment  Group II LLC, ERHC
                      Investment  Group A LLC,  Samoa LLC,  Ernest D. Chu,  Rene
                      Eichenberger, Daniel Levin, Gregg Srinivasan and Noreen G.
                      Wilson.


                 (The remainder of this page has been left blank
                                 intentionally.
                    Please see next page for all signatures.)


<PAGE>



                                   SIGNATURES


           After reasonable  inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete and
correct.

                                                           September 16, 1999
                                                        ------------------------
                                                               (Date)

                                                          /s/ HOWARD D. TALKS
                                                       -------------------------
                                                             (Signature)


                                                             Howard D. Talks
                                                       -------------------------
                                                                (Name)




Attention:  Intentional  misstatements  or omissions of fact constitute  federal
criminal violations (see 18 U.S.C. 1001).



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934

                  Environmental Remediation Holding Corporation
                                (Name of Issuer)

                    Common stock, par value $.0001 per share
                         (Title of Class of Securities)

                                    29406V100
                                 (CUSIP Number)

                            ERHC Investment Group LLC
                             c/o Corporate Builders
                       777 South Flagler Drive, Suite 909
                         West Palm Beach, Florida 33401
                           Attention: Managing Member
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  May 14, 1999
             (Date of Event which Requires Filing of this Statement)




<PAGE>


1          Name of Reporting  Person I.R.S.  Identification  No. of Above Person
           (entities only)

           ERHC Investment Group LLC

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)

           (b)      X

3          SEC Use Only

4          Source of Funds (See Instructions)

           AF

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           Delaware, United States of America

                          7        Sole Voting Power            62,724,519

Number of Shares
Beneficially Owned by
Each Reporting Person
     With
                          8        Shared Voting Power

                          9        Sole Dispositive Power       62,724,519

                          10       Shared Dispositive Power

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            62,724,519

12         Check Box if the Aggregate Amount in Row (11)
           excludes Certain Shares (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           50.9%

14         Type of Reporting Person (See Instructions)

           OO




<PAGE>


1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           ERHC Investment Group II LLC

2          Check the Appropriate Box if a Member of a Group (See Instructions)
           (a)

           (b)      X

3          SEC Use Only

4          Source of Funds (See Instructions)

           OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           Delaware, United States of America

                             7        Sole Voting Power                8,378,204
Number of Shares
Beneficially Owned by
Each Reporting Person
     With
                             8        Shared Voting Power

                             9        Sole Dispositive Power           8,378,204

                             10       Shared Dispositive Power

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            8,378,204

12         Check Box if the Aggregate Amount in Row (11)
           excludes Certain Shares (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           6.8%

14         Type of Reporting Person (See Instructions)

           OO




<PAGE>

1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           ERHC Investment Group A LLC

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)

           (b)      X

3          SEC Use Only

4          Source of Funds (See Instructions)

           OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           Delaware, United States of America

                             7       Sole Voting Power               8,378,204
Number of Shares
Beneficially Owned by
Each Reporting Person
           With
                             8       Shared Voting Power

                             9       Sole Dispositive Power          8,378,204

                             10      Shared Dispositive Power

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            8,378,204

12         Check Box if the Aggregate Amount in Row (11) excludes Certain Shares
           (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           6.8%

14         Type of Reporting Person (See Instructions)

           OO




<PAGE>


1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Samoa LLC

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           Delaware, United States of America

                             7      Sole Voting Power
Number of Shares
Beneficially Owned by
Each Reporting Person
           With
                             8      Shared Voting Power            71,102,722

                             9      Sole Dispositive Power

                             10     Shared Dispositive Power       71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            71,102,722

12         Check Box if the Aggregate Amount in Row (11) excludes Certain Shares
           (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           57.7%

14         Type of Reporting Person (See Instructions)

           OO




<PAGE>

1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Ernest D. Chu

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           PF, OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           United States of America

                             7      Sole Voting Power               547,500
Number of Shares
Beneficially Owned by
Each Reporting Person
     With
                             8      Shared Voting Power          71,102,722

                             9      Sole Dispositive Power          547,500

                             10     Shared Dispositive Power     71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            71,650,222

12         Check Box if the Aggregate Amount in Row (11) excludes Certain Shares
           (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           58.1%

14         Type of Reporting Person (See Instructions)

           IN




<PAGE>

1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Rene Eichenberger

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           Switzerland

                             7      Sole Voting Power              137,500
Number of Shares
Beneficially Owned by
Each Reporting Person
     With
                             8      Shared Voting Power         71,102,722

                             9      Sole Dispositive Power         137,500

                             10     Shared Dispositive Power    71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            71,240,222

12         Check Box if the Aggregate Amount in Row (11) excludes Certain Shares
           (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           57.8%

14         Type of Reporting Person (See Instructions)

           IN




<PAGE>

1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Daniel Levin

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           Switzerland; Israel

                             7       Sole Voting Power
Number of Shares
Beneficially Owned by
Each Reporting Person
      With
                             8       Shared Voting Power          71,102,722

                             9       Sole Dispositive Power

                             10      Shared Dispositive Power     71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            71,102,722

12         Check Box if the Aggregate Amount in Row (11)
           excludes Certain Shares (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           57.7%

14         Type of Reporting Person (See Instructions)

           IN



<PAGE>


1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Gregg Srinivasan

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           United States of America

                             7       Sole Voting Power
Number of Shares
Beneficially Owned by
Each Reporting Person
    With
                             8       Shared Voting Power          71,102,722

                             9       Sole Dispositive Power

                             10      Shared Dispositive Power     71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            71,102,722

12         Check Box if the Aggregate Amount in Row (11)
           excludes Certain Shares (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           57.7%

14         Type of Reporting Person (See Instructions)

           IN




<PAGE>

1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Howard D. Talks

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           PF, OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           United States of America

                             7       Sole Voting Power                 1,427,500
Number of Shares
Beneficially Owned by
Each Reporting Person
           With
                             8       Shared Voting Power              71,102,722

                             9       Sole Dispositive Power            1,427,500

                             10      Shared Dispositive Power         71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            72,530,222

12         Check Box if the Aggregate Amount in Row (11)
           excludes Certain Shares (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           58.8%

14         Type of Reporting Person (See Instructions)

           IN




<PAGE>

1          Name of Reporting Person
           I.R.S. Identification No. of Above Person (entities only)

           Noreen G. Wilson

2          Check the Appropriate Box if a Member of a Group (See Instructions)

           (a)      X (b)

3          SEC Use Only

4          Source of Funds (See Instructions)

           PF, OO

5          Check Box if Disclosure of Legal Proceedings is Required Pursuant to
           Item 2(d) or 2(e)

6          Citizenship or Place of Organization

           United States of America

                             7       Sole Voting Power               11,019,505
Number of Shares
Beneficially Owned by
Each Reporting Person
     With
                             8       Shared Voting Power             71,102,722

                             9       Sole Dispositive Power          11,019,505

                             10      Shared Dispositive Power        71,102,722

11         Aggregate Amount Beneficially Owned By Each Reporting Person

            82,122,227

12         Check Box if the Aggregate Amount in Row (11)
           excludes Certain Shares (See Instructions)

13         Percent of Class Represented by Amount in Row (11)

           66.6%

14         Type of Reporting Person (See Instructions)

           IN




<PAGE>


ITEM 1.  SECURITY AND ISSUER

This  statement  relates to the common  stock,  par value  $.0001 per share (the
"Common Stock"), of Environmental Remediation Holding Corporation, a corporation
organized  under the laws of the State of Colorado  ("Issuer"),  whose principal
executive offices are located at 3-5 Audrey Avenue, Oyster Bay, New York 11753.

ITEM 2.  IDENTITY AND BACKGROUND

This  statement  is filed on behalf  of:  ERHC  Investment  Group LLC, a limited
liability company organized under the laws of the State of Delaware ("Investment
Group I"); ERHC Investment Group II LLC, a limited  liability  company organized
under the laws of the State of Delaware ("Investment Group II"); ERHC Investment
Group A LLC, a limited  liability  company organized under the laws of the State
of  Delaware  ("Investment  Group A");  Samoa LLC, a limited  liability  company
organized under the laws of the State of Delaware  ("Samoa");  Ernest D. Chu, an
individual  citizen of the  United  States of  America;  Rene  Eichenberger,  an
individual  citizen of  Switzerland;  Daniel  Levin,  an  individual  citizen of
Switzerland and Israel;  Gregg Srinivasan,  an individual  citizen of the United
States of America;  Howard D. Talks, an individual  citizen of the United States
of America;  and Noreen G. Wilson, an individual citizen of the United States of
America  (Investment  Group I, Investment  Group II,  Investment Group A, Samoa,
Messrs.  Chu,  Eichenberger,  Levin,  Srinivasan,  and Talks, and Ms. Wilson are
collectively referred to herein as "Reporting Persons").

All of the  membership  interests in each of Investment  Group I and  Investment
Group II are held by  Samoa,  Messrs.  Chu,  Eichenberger,  and  Talks,  and Ms.
Wilson. All of the voting membership interests in Investment Group A are held by
Investment  Group  II.  All of the  membership  interests  in Samoa  are held by
Messrs. Levin and Srinivasan.

Mr.  Talks  is the  sole  managing  member  of  each of  Investment  Group I and
Investment  Group  II.  Investment  Group  II is the  sole  managing  member  of
Investment  Group A. Messrs.  Levin and Srinivasan are the sole managing members
of Samoa.  None of Investment Group I, Investment Group II,  Investment Group A,
or Samoa have any other managers, directors, or executive officers.

The sole purpose and business of each of Investment  Group I,  Investment  Group
II, and Investment Group A are acquiring,  owning,  holding,  offering for sale,
selling, assigning, pledging, financing, refinancing, and otherwise dealing with
shares of Common  Stock,  and the  principal  business and  principal  executive
offices of each such person are  located at c/o  Corporate  Builders,  777 South
Flagler Drive,  Suite 909, West Palm Beach,  Florida 33401. The sole purpose and
business of Samoa are acquiring,  owning,  holding,  offering for sale, selling,
assigning,  pledging,  financing,  refinancing,  and otherwise  dealing with the
shares of or other equity interests in, among other companies,  Investment Group
I and Investment  Group II, and the principal  business and principal  executive
offices of such person are located at c/o Levin & Srinivasan LLP, 1776 Broadway,
New York,  New York  10019.  Mr.  Chu's  present  principal  occupation  is as a
financial  consultant,  and his  principal  business  address  is c/o  Corporate
Builders,  777 South Flagler Drive,  Suite 909, West Palm Beach,  Florida 33401.
Mr.  Eichenberger's  present principal occupation is as a financial  consultant,
and his principal business address is c/o Corporate Builders,  777 South Flagler
Drive, Suite 909, West Palm Beach,  Florida 33401. Mr. Levin's present principal
occupation is as an attorney,  and his principal business address is c/o Levin &
Srinivasan  LLP,  1776  Broadway,  New York,  New York 10019.  Mr.  Srinivasan's
present  principal  occupation  is as an attorney,  and his  principal  business
address is c/o Levin & Srinivasan LLP, 1776 Broadway,  New York, New York 10019.
Mr. Talks'  present  principal  occupation is as an investor,  and his principal
business address is c/o Corporate Builders,  777 South Flagler Drive, Suite 909,
West Palm Beach,  Florida 33401. Ms. Wilson's present principal occupation is as
an investor and consultant,  and her principal  business address is 4718 Lillian
Avenue, Palm Beach Gardens, Florida 33418.

During  the last  five  years,  none of the  Reporting  Persons  has  been:  (i)
convicted in a criminal  proceeding  (excluding  traffic  violations  or similar
misdemeanors),  or  (ii)  a  party  to  a  civil  proceeding  of a  judicial  or
administrative body of competent jurisdiction and as a result of such proceeding
was or is  subject  to a  judgment,  decree,  or final  order  enjoining  future
violations  of, or prohibiting  or mandating  activities  subject to, federal or
state securities laws, or finding any violation with respect to such laws.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

Pursuant  to the  letter of  intent,  dated as of April 8, 1999 (the  "Letter of
Intent"),  between  Issuer  and  ERHC  Investment  Group,  Inc.,  a  corporation
organized  under the laws of the State of  Florida  ("Investment  Group  Inc."),
Issuer and Investment  Group Inc.  agreed to negotiate in good faith with a view
to entering into a definitive  securities  purchase  agreement (the  "Securities
Purchase  Agreement")  pursuant to which Issuer would agree, among other things,
to issue to Investment  Group Inc. or its assignees in one or more  transactions
validly issued,  fully paid, and  nonassessable  shares (the "Shares") of common
stock,  par value $.0001 per share, of Issuer (the "Common Stock")  representing
fifty-one  percent of the issued and  outstanding  capital  stock of Issuer on a
fully-diluted basis after giving effect to all of the transactions  contemplated
by the Letter of Intent  (i.e.,  152,330,974  shares of Common Stock (see Item 5
below))  (subject to the  Investors'  obligation,  in the event that any option,
warrant,  convertible  security,  or other  right,  agreement,  arrangement,  or
commitment  included in the calculation of fully-diluted  shares of Common Stock
for purposes of determining the number of shares of Common Stock issuable to the
Investors  expires by its terms without  having been  exercised,  converted,  or
exchanged,  as the case may be,  within  sixty  days  after  the  final  closing
contemplated  by the  Securities  Purchase  Agreement,  to return or cause to be
returned to Issuer for  cancellation the number of shares of Common Stock issued
to them attributable to such expired option,  warrant,  convertible security, or
other right, agreement, arrangement, or commitment).

Pursuant  to  the  assignment,   dated  as  of  April  9,  1999  (the  "Group  I
Assignment"), from Investment Group Inc. to Investment Group I, Investment Group
Inc.  assigned and  transferred  to Investment  Group I all of Investment  Group
Inc.'s right, title, and interest in, to, and under the Letter of Intent.

Pursuant  to  the  assignment,  dated  as of  April  27,  1999  (the  "Group  II
Assignment"), from Investment Group I to Investment Group II, Investment Group I
assigned and  transferred  to Investment  Group II all of  Investment  Group I's
right,  title,  and interest in, to, and under the Letter of Intent with respect
to 58.82353  percent of the Shares (the  "Group II  Shares")  (i.e.,  89,606,455
shares of Common  Stock (see Item 5 below)) and  retained  for itself all right,
title,  and  interest  in, to, and under the  Letter of Intent  with  respect to
41.17647 percent of the Shares (the "Group I Shares") (i.e.,  62,724,519  shares
of Common Stock (see Item 5 below)).

Pursuant  to  the  assignment,  dated  as  of  April  27,  1999  (the  "Group  A
Assignment"),  from Investment  Group II to Investment Group A, Investment Group
II assigned and transferred to Investment  Group A all of Investment  Group II's
right,  title,  and interest in, to, and under the Letter of Intent with respect
to  one-third  percent  of the Group II Shares  (the  "Group A  Shares")  (i.e.,
29,868,818  shares of Common  Stock (see Item 5 below)) and  retained for itself
all right,  title,  and  interest  in,  to, and under the Letter of Intent  with
respect to  66.66666  percent of the Group II Shares  (the  "Remaining  Group II
Shares") (i.e., 59,737,637 shares of Common Stock (see Item 5 below)).

Pursuant  to the  subscription  agreement,  dated  as of  April  27,  1999,  and
delivered and effective on May 14, 1999, (the "Group I Subscription Agreement"),
between Issuer and Investment Group I, Investment Group I irrevocably subscribed
for and agreed to  purchase  the Group I Shares  for  $210,000  (subject  to the
Investors'  obligation,  in the event that the final closing contemplated by the
Securities  Purchase Agreement does not occur, to return for cancellation shares
of Common Stock such that,  after giving  effect to such return,  the  Investors
would only hold such number of shares  commensurate with all amounts theretofore
paid to or at the  direction  of  Issuer  based  on a  pre-money,  fully-diluted
valuation of Issuer equal to $5,882,352.90).  The purchase price for the Group I
Shares  will be  contributed  by certain of the  Reporting  Persons out of their
personal funds.

Pursuant  to the  subscription  agreement,  dated  as of  April  27,  1999,  and
delivered and effective on May 14, 1999 (the "Group II Subscription Agreement"),
between Issuer and Investment  Group II,  Investment Group II subscribed for and
agreed to purchase the Remaining  Group II Shares and 71.95 percent of the Group
A Shares for  $2,625,000,  subject in all respects to the execution and delivery
of the Securities Purchase Agreement by the parties thereto and the satisfaction
or waiver of all of the conditions to the obligations of the parties thereunder.
If the  Securities  Purchase  Agreement is executed and delivered by the parties
thereto and all of the conditions to their respective obligations thereunder are
satisfied or waived,  the purchase price for the Remaining  Group II Shares will
be raised from additional investors.

Pursuant  to the  subscription  agreement,  dated  as of  April  27,  1999,  and
delivered and effective on May 14, 1999 (the "Group A Subscription  Agreement"),
between Issuer and Investment Group A, Investment Group A irrevocably subscribed
for and purchased 28.05 percent of the Group A Shares (i.e., 8,378,204 shares of
Common Stock (see Item 5 below)) for $165,000.  The purchase price for the Group
A Shares was raised from certain  investors who are  unaffiliated  with, and are
not part of any group with, any of the Reporting Persons.

Neither Issuer nor any of the Reporting  Persons has entered into the Securities
Purchase  Agreement,  and significant  conditions to the parties  willingness to
enter  into  such  agreement  (including  the  satisfaction  of  certain  of the
Reporting Persons, in their sole discretion, with the results of their business,
financial,  accounting, and legal due diligence investigations of Issuer) remain
unsatisfied as of the date hereof.

ITEM 4.  PURPOSE OF TRANSACTION

The  purpose  of the  transactions  contemplated  by the Letter of Intent is for
Investment  Group  I,  Investment  Group  II,  Investment  Group  A,  and  their
respective  successors or assigns collectively to acquire the Shares and thereby
acquire control of Issuer and thereafter replace its existing board of directors
and executive  officers.  The purpose of the  transactions  contemplated  by the
Group I  Subscription  Agreement and the Group A  Subscription  Agreement was to
provide Issuer sufficient working capital prior to execution and delivery of the
Securities  Purchase  Agreement by the parties  thereto and  consummation of the
transactions  contemplated  thereby  to  permit  Issuer to  remain  solvent.  In
addition,  upon  acquiring  control of Issuer,  the Reporting  Persons intend to
cause Issuer:  (i) to divest itself of substantially all of its assets which are
unrelated  to the  development  of oil and  gas  concessions  in the  Democratic
Republic  of Sao Tome  and  Principe;  (ii) to  close  its  offices  located  in
Lafayette,  Louisiana; (iii) to change its name; and (iv) to change its state of
incorporation from Colorado to Delaware.  Except as noted above, at the time the
parties to the Letter of Intent,  the Group I  Subscription  Agreement,  and the
Group  A  Subscription  Agreement  entered  into  such  agreements,  none of the
Reporting  Persons had, and as of the date hereof none of the Reporting  Persons
has, any plan or proposal which relates to or would result in any of the actions
or events described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

Based upon information  obtained from Issuer through its counsel:  (i) the total
number of shares of Common  Stock issued and  outstanding  as of April 22, 1999,
was 52,215,302;  and (ii) the total number of shares of Common Stock outstanding
as  of  April  22,  1999,  on  a  fully-diluted  basis  assuming  the  exercise,
conversion,  or exchange of all outstanding  options,  warrants,  convertible or
exchangeable  securities,  and  other  rights,  agreements,   arrangements,   or
commitments  of any kind,  nature,  or  description  whatsoever  relating to the
capital  stock of Issuer  or  obligating  Issuer to issue or sell any  shares of
capital stock of, or any other interest in, Issuer was 146,357,210.

Accordingly,  after giving  effect to the issuance of the shares of Common Stock
pursuant  to the Group I  Subscription  Agreement  and the Group A  Subscription
Agreement as described in Item 3 above: (i) Investment Group I is the beneficial
holder of, and,  through  Investment Group I, each other Reporting Person (other
than  Investment  Group  II and  Investment  Group  A) may be  deemed  to be the
beneficial   owner  of,   62,724,519   shares  of  Common  Stock,   representing
approximately  50.9 percent of the total number of shares of Common Stock issued
and outstanding (and approximately 28.8 percent of the total number of shares of
Common Stock  outstanding  on a  fully-diluted  basis) as of April 22, 1999; and
(ii) Investment  Group A is the beneficial  holder of, and,  through  Investment
Group A, each other  Reporting  Person  (other than  Investment  Group I) may be
deemed  to be the  beneficial  owner  of,  8,378,204  shares  of  Common  Stock,
representing  approximately  6.8 percent of the total number of shares of Common
Stock issued and outstanding (and  approximately 3.9 percent of the total number
of shares of Common Stock outstanding on a fully-diluted  basis) as of April 22,
1999.

In addition, Messrs. Chu, Eichenberger,  and Talks and Ms. Wilson are the direct
or indirect  beneficial  owners of a further  547,500,  137,500,  1,427,500  and
11,019,505 shares of Common Stock,  respectively,  representing 0.4 percent, 0.1
percent,  1.2  percent and 8.9  percent,  respectively,  of the total  number of
shares of Common Stock issued and outstanding  (and  approximately  0.3 percent,
0.1 percent, 0.7 percent, and 5.1 percent,  respectively, of the total number of
shares of Common Stock  outstanding  on a  fully-diluted  basis) as of April 22,
1999.  Each  other  Reporting  Person  hereby  expressly  disclaims   beneficial
ownership of all of the shares of Common Stock referred to in this paragraph and
held by Messrs. Chu, Eichenberger, or Talks or Ms. Wilson, as the case may be.

If the  Securities  Purchase  Agreement is executed and delivered by the parties
thereto  and all of the  transactions  contemplated  by the Letter of Intent are
consummated,  an  aggregate  of  152,330,974  shares  of Common  Stock  would be
issuable thereunder (including the shares of Common Stock issued pursuant to the
Group I Subscription Agreement and the Group A Subscription Agreement)

Other than in connection  with the  transactions  contemplated  by the Letter of
Intent, the Group I Subscription Agreement, Group II Subscription Agreement, and
the Group A Subscription  Agreement,  none of the Reporting Persons has effected
any transactions in the Common Stock during the past sixty days.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
SECURITIES OF THE ISSUER

Please  see  Item 3  above  for a  description  of the  Letter  of  Intent,  the
Securities Purchase Agreement, the Group I Assignment,  the Group II Assignment,
the  Group A  Assignment,  the  Group I  Subscription  Agreement,  the  Group II
Subscription Agreement, and the Group A Subscription Agreement.

The respective  members of Investment Group I, Investment  Group II,  Investment
Group A, and Samoa are parties to oral limited liability company agreements with
respect thereto.

Except as described  above,  and except for the joint filing agreement among the
Reporting Persons attached hereto as Exhibit 5, none of the Reporting Persons is
a party to any contract, arrangement, understanding, or relationship required to
be described pursuant to Item 6 of Schedule 13D.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

           Exhibit               1. Letter of intent, dated as of April 8, 1999,
                                 between   Environmental   Remediation   Holding
                                 Corporation and ERHC Investment Group, Inc.

           Exhibit               2.  Subscription  agreement,  dated as of April
                                 27, 1999,  and  delivered  and effective on May
                                 14,  1999,  between  Environmental  Remediation
                                 Holding  Corporation and ERHC Investment  Group
                                 LLC.

           Exhibit               3.  Subscription  agreement,  dated as of April
                                 27, 1999,  and  delivered  and effective on May
                                 14,  1999,  between  Environmental  Remediation
                                 Holding  Corporation and ERHC Investment  Group
                                 II LLC.

           Exhibit               4.  Subscription  agreement,  dated as of April
                                 27, 1999,  and  delivered  and effective on May
                                 14,  1999,  between  Environmental  Remediation
                                 Holding Corporation and ERHC Investment Group A
                                 LLC.

           Exhibit               5. Joint filing agreement,  dated as of May 21,
                                 1999,  between ERHC Investment  Group LLC, ERHC
                                 Investment  Group II LLC, ERHC Investment Group
                                 A  LLC,   Samoa  LLC,   Ernest  D.  Chu,   Rene
                                 Eichenberger,  Daniel Levin,  Gregg Srinivasan,
                                 Howard D. Talks, and Noreen G.
                                 Wilson.




<PAGE>




                                   SIGNATURES

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete, and correct.

                                             ERHC INVESTMENT GROUP LLC

Dated May 21, 1999:                           By: /s/ Howard D. Talks
                                              -----------------------
                                                   Howard D. Talks
                                                   Managing Member

                                             ERHC INVESTMENT GROUP II LLC

Dated May 21, 1999:                          By: /s/ Howard D. Talks
                                             --------------------------
                                                   Howard D. Talks
                                                   Managing Member

                                             ERHC INVESTMENT GROUP A LLC

                                             By:  ERHC INVESTMENT GROUP II LLC

Dated May 21, 1999:                          By: /s/ Howard D. Talks
                                             -----------------------------------
                                                   Howard D. Talks
                                                   Managing Member

                                             SAMOA LLC

Dated May 21, 1999:                          By: /s/ Daniel Levin
                                             -----------------------------------
                                                  Daniel Levin
                                                  Member

                                            /s/ ERNEST D. CHU
Dated May 21, 1999:                         ------------------------------------
                                            ERNEST D. CHU

                                            /s/ RENE EICHENBERGER
Dated May 21, 1999:                         ------------------------------------
                                            RENE EICHENBERGER


<PAGE>



                                           /s/ DANIEL LEVIN
Dated May 21, 1999:                        -------------------------------------
                                            DANIEL LEVIN

                                            /s/ GREGG SRINIVASAN
Dated May 21, 1999:                         ------------------------------------
                                            GREGG SRINIVASAN

                                            /s/ HOWARD D. TALKS
Dated May 21, 1999:                         ------------------------------------
                                            HOWARD D. TALKS

                                            /s/ NOREEN G. WILSON
Dated May 21, 1999:                         ------------------------------------
                                            NOREEN G. WILSON




<PAGE>



                                LETTER OF INTENT

April 8, 1999

Environmental Remediation Holding Corporation
1686 General Mouton Avenue
Lafayette, LA  70508

Attention:  James R. Callender, President

Dear Mr. Callender:

This letter (the "Letter of Intent")  and the  attached  Term Sheet (which is an
integral part hereof) sets forth the general terms of the proposed  transactions
in which ERHC  Investment  Group,  Inc.  and its  affiliates  and  assigns  (the
"Purchasers") will invest in Environmental  Remediation Holding Corporation (the
"Company").

This Letter of Intent is not intended to be binding on either the  Purchasers or
the  Company,  except  for the  respective  obligations  of the  parties  in the
following  six  paragraphs,  and will be  superseded  in its  entirety  upon the
execution of a definite  Securities  Purchase  Agreement and related  agreements
referenced in the attached Term Sheet.

If the Board of Directors of the Company approves the transactions  contemplated
by this  Letter of Intent,  this Letter of Intent will be binding on the Company
subject to obtaining  appropriate  approval of the  stockholders and convertible
noteholders  (if required),  of the Company,  which the Company will endeavor to
obtain.

If the Board of Directors of the Company approves the transactions  contemplated
by this Letter of Intent as set forth in the attached Term Sheet, the Purchasers
will be obligated to make the  investment on the terms and  conditions set forth
in  the  Term  Sheet;   subject  to  the  execution  of  definitive   agreements
satisfactory to the Purchasers,  including a Securities Purchase Agreement,  and
subject to obtaining  appropriate  approval of the  stockholders and convertible
noteholders (if required), of the Company.

After the execution of this Letter of Intent by you and pending the  preparation
and execution of the  Securities  Purchase  Agreement and  thereafter  until the
Closing,  the Company will give the  Purchasers and their  representatives  full
access to the  premises  and  management  personnel  of the  Company  and to all
accounting,  financial  and other  records  applicable  to the  Company and will
furnish the Purchasers all information  with respect to the business and affairs
of the  Company  as the  Purchasers  may  reasonably  request.  In the event the
transactions  contemplated  hereby are not  consummated,  (i) the Purchasers and
their representatives will return all documents,  contracts, and papers received
from the Company  and any copies  thereof,  (ii) will not  disclose to any third
person  or to  the  public  any of  such  information,  and  (iii)  each  party,
including,  without  limitation,  parties which have accepted and agreed to this
Letter of Intent, will execute a general release in favor of the Purchasers from
any and all liabilities  related to transactions  contemplated by this Letter of
Intent and the attached Term Sheet.

As material  inducement  to the  Purchasers  to commit the  financial  and other
resources  necessary to conduct their  investigations  and prepare and negotiate
the agreements  contemplated by the Term Sheet, the Company covenants and agrees
that none of the Company or the Company's affiliates,  agents or representatives
shall, directly or indirectly,  entertain any proposals or offers from, or enter
into any  negotiations,  discussions,  or agreements  with, or provide any other
person with any information in connection with a merger or  consolidation,  or a
sale of any material  portion of the assets or equity or debt  securities of the
Company  from the date of this  Letter of Intent  until  May 30,  1999,  or such
earlier date as the Purchasers advise the Company in writing that they no longer
intend to proceed with an investment in the Company.

Any and all  announcements  and  publicity  releases  prior to the Closing which
relate to the  investment  contemplated  hereby shall be subject to the parties'
mutual  approval.  This  proposal for  investment  in the Company,  as it may be
modified from time to time,  will be held in confidence by the Company and shall
not be  disclosed  to any third party  without  the  Purchasers'  prior  written
consent.


<PAGE>

If the foregoing is  acceptable to you,  kindly  acknowledge  your  agreement by
executing this letter where indicated below before April 9, 1999.

                                             Sincerely,

                                             ERHC Investment Group, Inc.

                                             By: /s/ HOWARD TALKS, PRES.
                                             ---------------------------
                                             HOWARD D. TALKS, PRESIDENT

Date:    April 8, 1999

ACCEPTED AND AGREED:

Environmental Remediation Holding Corp.

By: /s/    JAMES R. CALLENDER, SR.                    Date:    April 9, 1999
           ------------------------------             -----    -------------
           JAMES R. CALLENDER, PRESIDENT

By: /s/    JAMES R. CALLENDER, SR.                    Date:    April 9, 1999
           ------------------------------             -----    -------------
           JAMES R. CALLENDER

By: /s/    SAM L. BASS, JR.                           Date:
           ------------------------------
           SAM L. BASS, JR.

By: /s/    JAMES A. GRIFFIN                           Date:    April 8, 1999
           ------------------------------             -----    -------------
           JAMES A. GRIFFIN

By: /s/    KEN WATERS                                 Date:    April 8, 1999
           ------------------------------             -----    -------------
           KEN WATERS

By: /s/    ROBERT MCKNIGHT                            Date:    April 8, 1999
           ------------------------------             -----    -------------
           ROBERT MCKNIGHT

By:                                                   Date:

           WILLIAM BEATON

By:                                                   Date:

           AL COTTON

By: /s/    RICHARD MAGAR                              Date:    April 9, 1999
           ------------------------------             -----    -------------
           RICHARD MAGAR



<PAGE>




                                   TERM SHEET
                               TERMS PROPOSED FOR
                   INVESTMENT BY ERHC INVESTMENTS GROUP, INC.
                                       IN
                  ENVIRONMENTAL REMEDIATION HOLDING CORPORATION

This term sheet  summarizes  the proposed  principle  terms of the investment by
ERHC Investment  Group,  Inc. in Environmental  Remediation  Holding Corp. It is
based  upon the fact that ERHC  Investment  Group,  Inc.  has been  advised  the
Existing  Board of Directors  has taken  certain  actions  regarding  affiliated
transactions and rescinded certain minutes.  This term sheet is made in reliance
upon such changes as noted herein.

I.         INVESTMENT

Issuer:             Environmental    Remediation    Holding   Corporation   (the
                    "Company")

Purchasers:ERHC     Investment  Group,  Inc.  and  its  affiliates  and  assigns
                    (collectively, the "Purchasers")

Security:           The  Company  will issue to the  Purchaser  Shares of Common
                    Stock (the "Common  Shares") to be issued in installments as
                    the  Purchase  Price is paid,  which in the  aggregate  will
                    equal 51% of the voting  capital  stock of the  Company on a
                    fully   diluted  basis   assuming  the   conversion  of  all
                    outstanding  options,  warrants and other  convertible notes
                    and  securities  outstanding  of the date of the issuance of
                    the Common  Shares  (including  all stock and warrants to be
                    issued to other parties as contemplated in the Term Sheet).

Share Holder:       The Company  will take all actions  reasonably  necessary to
 Ratification       promptly  hold a  stockholders  meeting  for the  purpose of
                    obtaining shareholder  ratification following the closing of
                    the Term Sheet.

Assignment of       ERHC Investment Group, Inc. has the right to assign any part
 Rights:            of the right to  purchase  Common  Stock to  affiliates  and
                    other assigns who shall together  constitute the Purchasers.
                    Assignment of such shares will be contingent upon assumption
                    of pro rata obligations  under any Investment  Documents (as
                    defined below)

Purchase Price:     Aggregate  of  three  million   ($3,000,000)   dollars  (the
                    "Purchase Price")

                    Payment of Purchase  Price:  1. The  Purchase  Price will be
                    payable to the Company in installments  as follows:  165,000
                    at the initial closing and the balance of the $835,000 to be
                    invested  as needed from and after the Closing to pay agreed
                    portion of liabilities,  including accrued salaries, and for
                    working capital.

                    2.  After   Closing  and  upon  approval  by  Purchaser  and
                    Purchasers'   counsel  of  agreements  with  the  Democratic
                    Republic of Sao Tome and Principe  ("Sao  Tome")  $1,000,000
                    will be  delivered  to the  Escrow  Account on behalf of the
                    Company for the benefit and release of the Government of Sao
                    Tome pursuant to the terms of an Escrow Agreement.

                    3.  $1,000,000  to the Company upon approval by Sao Tome and
                    execution of Production  Sharing Agreement between Mobil Oil
                    Corporation,  STPETRO,  Sao Tome and the Company,  providing
                    for a 5% royalty override to the Company.

Capital Structure:  Upon Consummation of the Closing Date (defined herein),  the
                    capital  structure of the Company on a fully  diluted  basis
                    (with corresponding voting interests) will be as follows:

                    Purchaser                                          51%

                    Existing investors, shareholders,
                    noteholders and existing directors
                    and employees (including shares and
                    warrants which may be issued or granted
                    as contemplated in the Term Sheet)                 49%*

               *    Subject to  dilution  only if the Company  issues  equity to
                    Procura  Financial   Consultants  c.c.  in  connection  with
                    settlement.

Issuance of Shares: Common Shares will be issued and delivered to the Purchaser
                    as follows:


                    1. Upon the total investment of $1,000,000 to be invested as
                    needed from and after the  Initial  Closing,  the  following
                    amounts will be issued on pro rata basis as invested: 15%

                    2.  Upon  the  investment  of  $1,000,000  to be paid to the
                    Government of Sao Tome: 15%

                    3. Upon the approval of the Production  Sharing Agreement an
                    additional investment of $1,000,000: 15%

                    4. Purchaser  within 10 days of making the final  investment
                    for a total of  $3,000,000  will  receive the final 6% for a
                    total of 51% of the voting capital stock of the Company on a
                    fully   diluted  basis   assuming  the   conversion  of  all
                    outstanding  options,  warrants and other  convertible notes
                    and  securities  outstanding  of the date of the issuance of
                    the Common  Shares  (including  all stock and warrants to be
                    issued to other parties as contemplated in the Term Sheet)

Initial Closing     The Initial  Closing for issuance of the Common  Shares will
 Date:              be on or before April 19, 1999 unless otherwise  extended by
                    the  parties,  subject  only  to  the  satisfaction  of  the
                    "Conditions  to the Initial  Closing"  set forth in the Term
                    Sheet (the "Initial Closing Date")

Final Closing Date: The Final  Closing  will be upon the signing of the Security
                    Purchase  Agreement,  Registration Rights Agreement and such
                    instruments or documents  necessary to close the transaction
                    but no  later  than 90 days  from  the  date of the  Initial
                    Closing Date (the "Closing Date")

Board of Directors: Upon  approval by the  Existing  Board of  Directors  of the
                    Company of this transaction  contemplated by this Term Sheet
                    and the  issuance of Common  Shares on the  Initial  Closing
                    Date (i) The Existing Board of Directors  shall cause all of
                    the officers of Company to resign as such date, and (ii) the
                    Purchaser shall have the right to cause any three members of
                    the current  Board of  Directors  to resign and to fill such
                    vacancies  with  three  new  Board  Members   designated  by
                    Purchasers. On the Closing Date, the Purchaser will have the
                    right  to  cause  the  remaining  four  members  of the then
                    current Board of Directors  not  designated by the Purchaser
                    to  resign  and fill  such  vacancies  with  four new  Board
                    Members designated by Purchaser.

Existing Board      Simultaneous  with the Initial Closing Date the Company will
And Employees:      enter into appropriate  consulting or settlement  agreements
                    which  contain an  issuance  of Common  Stock or warrants to
                    purchase shares of Common Stock pursuant to acceptable terms
                    and conditions and seek releases when  appropriate  with the
                    following individuals.

                         Mr. Sam L. Bass Jr.
                         Mr. James R. Callender
                         Mr. Richard Magar
                         Mr. James Griffin
                         Mr. Robert McKnight
                         Mr. Al Cotton
                         Mr. Ken Waters
                         Mr. Tom Wilson
                         Mr. William Beaton
                         Mr. Nando Rita

                    Existing board members will be allowed to keep the shares of
                    stock  issued  for  service   rendered  and  not   otherwise
                    rescinded   subject  to  the  standard   restrictive   share
                    provision.

Employees:          Effective as of the Initial  Closing Date,  the Company will
                    as a part of such  closing  have or will  provide  severance
                    agreements for the following  employees and  consultants and
                    they will  provide a general  release for the benefit of the
                    Company.

                         Ms. Linda Mier
                         Ms. Karen Bajat
                         Mr. George Lablanc
                         Mr. Charles Briely
                         Mr. Gerry Graham
                         Mr. Ed Wilkerson
                         Ms. Dale Smith
                         Ms. Jennifer Riggs
                         Ms. Barbara Roth
                         Mr. Mark Herpin
                         Mr. Wade Williams


Miscellaneous:      Steve Durland CPA will be paid $75,000 within 30 days of the
                    initial  closing on the  outstanding  bill. The remainder of
                    the bill will be paid over the next six months in accordance
                    with the attached schedule.

                    Mintmire  &   Associates   will  be  paid   $50,000  of  the
                    outstanding bill within 30 days of the initial closing.

                    The remainder of the accounts payable will be reviewed and a
                    payment  schedule  set-up  within  30  days  of the  initial
                    closing.  The Company to provide ERHC Investment Group, Inc.
                    and  the  Accounting  firm a final  copy  of all  ERHC/BAPCO
                    payables.  The Existing Board will confirm that the payables
                    are true and correct to the best of their knowledge.

Prior Actions Taken
By the Existing
Board Of Directors: 1. The Board  realigned  the assets in its  subsidiary  Bass
                    American  Petroleum   ("BAPCO")  and  transferred  BAPCO  as
                    realigned  to Mr. Bass or his  assigns in  exchange  for the
                    return of  4,000,000  million  shares of ERHC  Common  Stock
                    originally  issued  to him or his  assigns  as  part  of the
                    purchase  of  BAPCO.  Mr.  Bass  will  provide  releases  in
                    connection with the above action.

                    2. The Board rescinded the acquisition of the  environmental
                    equipment  from Bass World Wide Services in exchange for the
                    744,000  shares of ERHC Common  Stock issued to Mr. Bass and
                    agrees to return the  equipment  to him or his  assign.  Mr.
                    Bass will  provide  releases  in  connection  with the above
                    transactions.

                    3.  The  Board  rescinded  the  acquisition  of the  Chevron
                    Agreement from Bass  Environmental  Services in exchange for
                    the 3,000,000  million shares of ERHC Common Stock issued to
                    Mr.  Bass or his  assigns  and ERHC  agrees  to  return  the
                    Chevron  Contract to Mr. Bass or his assigns.  Mr. Bass will
                    provide releases in connection with the above transaction.

                    4. The Board  placed a stop of the  200,000  shares of stock
                    issued to MYTEC & Associates.

                    5. The Board rescinded the  distribution of a portion of the
                    5% royalty  override  interest  granted on February 11, 1999
                    and did not ratify the supplement to its counsels'  retainer
                    agreement covering a portion of the distribution.  The above
                    parties will provide  releases in connection  with the above
                    transaction.

                    6. The  Board  rescinded  (i) the  conditional  issuance  of
                    3,000,000 shares of Common Stock to Bass, Griffin and Wilson
                    dated June 2, 1997. The above parties will provide  releases
                    in  connection  with the above  transaction;  (ii) the Board
                    rescinded the conditional  issuance  granted relative to the
                    MIII  Agreement  dated  July of 1997.  The  parties  to this
                    transaction  will provide  releases in  connection  with the
                    transaction;  (iii) the Board  rescinded  the  suspension of
                    James Griffin from the Board.

                    7. The Board  re-approved the issuance of 2,000,000  million
                    shares each of ERHC common  stock to Bass,  Griffin,  Noreen
                    Wilson and Jim Callender in  consideration  of the formation
                    and legislative adoption of STPETRO and the execution of the
                    Mobil T.A.A. Agreement.


<PAGE>

Conditions to
Investment:         The Initial Closing Date shall be conditioned upon

                    (A) the execution and delivery of the  standstill  agreement
                    by a majority of the noteholders  entitled to amend in favor
                    of the Company and the Purchaser which provides a standstill
                    and ending  October 15, 1999 in respect to certain  matters,
                    including  but  not  limited  to the  conversion  of  stock,
                    acceleration,  collection,  bankruptcy or foreclosures;  and
                    (ii) the  modification  of the  convertible  noteholders  to
                    modify  the  conversion  formula  of the notes to a floor of
                    $.25 per share to the  purchase  price and waiver of any and
                    all antidilution  provisions or preemptive  rights.  (B) The
                    execution   and   delivery   by  the  Company  of  a  letter
                    representing and warranting as to the capital  structure and
                    providing  indemnity to the Purchasers;  and (C) Resolutions
                    of  the   Existing   Board  of   Directors   approving   and
                    authorization of the transactions  contemplated by this Term
                    Sheet and all actions  required to be taken as conditions to
                    the Initial Closing as set forth herein.

Conditions to
 Investment:        The  Closing  Date  shall  be   conditioned   upon  (A)  the
                    negotiation   and   execution   of   mutually   satisfactory
                    definitive   investment   agreements  reflecting  the  terms
                    hereof,   including   a   Securities   Purchase   Agreement,
                    Registration  Rights Agreement and such other instruments or
                    documents  necessary by the  Purchasers to consummate  their
                    investment  (the  "Investment  Documents")  each  containing
                    appropriate   representations,    warranties,    conditions,
                    covenants and indemnities;  (B) completion by the Purchasers
                    of   their   business,    tax,    accounting,    regulatory,
                    environmental,  legal and other due diligence  reviews shall
                    have been satisfactory to the Purchasers; (C) receipt of all
                    necessary  governmental and regulatory approval and consents
                    if any  from  third  parties  necessary  to  consummate  the
                    transactions.

                    In addition,  the Company gives the Purchasers permission to
                    open  discussions  during the due diligence  period prior to
                    closing date with  STPETRO,  DRSTP,  Mobil Oil,  Procura and
                    Shareholders.

                    If the Closing Date shall not occur as  contemplated in this
                    Term Sheet,  the Company shall issue to the Purchaser Common
                    Stock based on a  $5,882,352.90  valuation of the Company as
                    adjusted  by the Prior  Action  of the Board and upon  which
                    this Term Sheet is in reliance.

Fees and Expenses:  At the Closing,  the Company  shall  reimburse the Purchaser
                    for all  reasonable  fees and  expenses  incurred by each of
                    them in  connection  with their  proposed  investment in the
                    Company.

Date of Acceptance: On or before April 9, 1999.



<PAGE>



                            ERHC INVESTMENT GROUP LLC
                             c/o Corporate Builders
                       777 South Flagler Drive, Suite 909
                         West Palm Beach, Florida 33401

                              As of April 27, 1999

Environmental Remediation
Holding Corporation
3-5 Aubry Lane
Oyster Bay, New York  11753
Attention:  President

Re:   Subscription Agreement

Ladies and Gentlemen:

We refer to the  letter of  intent,  dated as of April 8, 1999 (the  "Letter  of
Intent"), between ERHC Investment Group, Inc., a corporation organized under the
laws of the  State of  Florida  ("Investment  Group  Inc."),  and  Environmental
Remediation Holding Corporation,  a corporation  organized under the laws of the
State of Colorado (the "Company"),  pursuant to which the Company agreed,  among
other things:  (i) to issue to Investment  Group Inc. or its assignees in one or
more  transactions  validly issued,  fully paid, and  nonassessable  shares (the
"Shares")  of common  stock,  par value  $.0001 per share,  of the Company  (the
"Common  Stock")  representing  fifty-one  percent of the issued and outstanding
capital stock of the Company on a fully-diluted basis after giving effect to all
of the transactions contemplated by the Letter of Intent; and (ii) to enter into
a definitive securities purchase agreement (the "Securities Purchase Agreement")
with  respect to such  issuances  of Common  Stock.  This letter  agreement  (as
amended,   supplemented,   or  otherwise   modified  from  time  to  time,  this
"Agreement"),  is intended to set forth the mutual  understanding  and agreement
between ERHC Investment Group LLC, a limited  liability  company organized under
the  laws  of  the  State  of  Delaware  ("Investor"),  the  assignee  of all of
Investment  Group  Inc.'s  rights  under the Letter of Intent,  and the  Company
regarding  Investor's initial  subscription for a portion of the Shares prior to
the execution and delivery of the Securities  Purchase  Agreement by the parties
thereto.   In   consideration   of   the   respective   agreements,   covenants,
representations,  and  warranties  hereinafter  set  forth  and  other  good and
valuable   consideration,   the  receipt  and   adequacy  of  which  are  hereby
acknowledged,  and  intending to be legally  bound  hereby,  the parties  hereto
hereby agree as follows:

Investor  hereby  irrevocably  subscribes  for the  portion of the  Shares  (the
"Initial Shares") representing  twenty-one percent of the issued and outstanding
capital stock of the Company on a fully-diluted basis after giving effect to all
of the transactions contemplated by the Letter of Intent, and Investor shall pay
therefor  in  lawful  money  of the  United  States  of  America  in one or more
installments  from time to time after the date hereof  $210,000 in the aggregate
(the  "Purchase  Price").  The unpaid  amount of the Purchase  Price at any time
outstanding  shall bear interest at the "applicable  federal rate" per annum (as
such term is used for purposes of Section  1274(d) of the Internal  Revenue Code
of the United  States of America) as in effect on the date hereof.  Upon payment
in full of the Purchase Price and all accrued interest,  the Company shall issue
to Investor the Initial  Shares,  and shall  deliver or cause to be delivered to
Investor a certificate or certificates evidencing such Initial Shares.

Upon the execution and delivery of the Securities Purchase Agreement,  the terms
and provisions of the Securities  Purchase  Agreement shall apply to the Initial
Shares  subscribed  for  and  purchased  hereby,   and  the  other  transactions
contemplated by this Agreement.

Notwithstanding  anything to the contrary contained herein, if the Final Closing
(as defined in the Letter of Intent) has not occurred  within  ninety days after
the date hereof,  Investor shall surrender to the Company for cancellation  that
number of the Initial Shares such that,  after giving effect to such  surrender,
the remaining  Initial Shares held by Investor  would  represent 3.57 percent of
the issued and outstanding capital stock of the Company on a fully-diluted basis
after giving  effect to all of the  transactions  contemplated  by the Letter of
Intent.

As an inducement to the Company to enter into this  Agreement,  Investor  hereby
represents and warrants to the Company that:

                    (i) Investor has duly executed and delivered this agreement,
                    and  (assuming  due  execution  and delivery by the Company)
                    this  agreement  constitutes  a legal,  valid,  and  binding
                    obligation  of  Investor,  enforceable  against  Investor in
                    accordance with its terms;

                    (ii) Investor's execution,  delivery, and performance hereof
                    do not and will not: (A) violate or conflict with Investor's
                    certificate   of   formation   or   similar   organizational
                    documents,   or  any  law  or  any  order,  writ,  judgment,
                    injunction,  decree,  stipulation,  determination,  or award
                    entered by or with any governmental authority and applicable
                    to Investor;  (B) violate or infringe upon any rights of any
                    person; or (C) require any consent, approval, authorization,
                    or other order of, action by,  filing with, or  notification
                    to, any governmental authority or any other person; and
<PAGE>

                    (iii) Investor  understands that the Initial Shares have not
                    been  registered  under  the  Securities  Act  of  1933,  as
                    amended,  or the  laws of any  state  and may not be sold or
                    transferred,  or otherwise disposed of, without registration
                    under the  Securities Act and  applicable  state  securities
                    laws, or pursuant to an exemption therefrom.

                    As an inducement  to Investor to enter into this  Agreement,
                    the Company  hereby  represents  and warrants to Investor as
                    follows:

                    (i)  The  Company  has  duly  executed  and  delivered  this
                    agreement,  and  (assuming  due  execution  and  delivery by
                    Investor) this  agreement  constitutes a legal,  valid,  and
                    binding obligation of the Company,  enforceable  against the
                    Company in accordance with its terms;

                    (ii) The  Company's  execution,  delivery,  and  performance
                    hereof do not and will not: (A) violate or conflict with the
                    Company's  articles of  incorporation  or by-laws or similar
                    organizational  documents,  or any law or any  order,  writ,
                    judgment, injunction, decree, stipulation, determination, or
                    award  entered  by or with any  governmental  authority  and
                    applicable to the Company;  (B) violate or infringe upon any
                    rights of any person; or (C) require any consent,  approval,
                    authorization, or other order of, action by, filing with, or
                    notification  to, any  governmental  authority  or any other
                    person; and

                    (iii) Upon  issuance,  the  Initial  Shares  will be validly
                    issued,  fully  paid,  and  nonassessable  and  will  not be
                    subject to any  preemptive  rights,  and will  represent not
                    less than  twenty-one  percent of the issued and outstanding
                    capital stock of the Company on a fully-diluted  basis after
                    giving effect to all of the transactions contemplated by the
                    Letter of Intent.

                    No  amendment  hereof or  supplement  or other  modification
                    hereto, and no consent to, or waiver,  discharge, or release
                    of, any term or provision or breach  hereof,  shall be valid
                    or effective  unless such  amendment,  supplement,  or other
                    modification,   or  such  consent,  waiver,   discharge,  or
                    release,  is in writing,  expressly  refers  hereto,  and is
                    signed by the party to be bound thereby.

If any term or other  provision  hereof is  determined by any court of competent
jurisdiction to be invalid,  illegal,  or  unenforceable  in whole or in part by
reason of any applicable law or public policy,  and such  determination  becomes
final and nonappealable, such term or other provision shall remain in full force
and effect to the  fullest  extent  permitted  by law,  and all other  terms and
provisions hereof shall remain in full force and effect in their entirety.

This  Agreement  shall be governed by, and  construed and enforced in accordance
with, the laws of the State of New York.

Each party hereto hereby  unconditionally  and  irrevocably  waives all right to
trial by jury in any action,  suit,  or proceeding  (whether  based on contract,
tort, or otherwise) based upon,  resulting from,  arising out of, or relating to
this Agreement or any transaction or agreement contemplated hereby.

This  Agreement  may  be  executed  in any  number  of  counterparts  and by the
different parties hereto in separate  counterparts,  each of which when executed
shall be  deemed  to be an  original,  and all of  which  taken  together  shall
constitute one and the same agreement with the same effect as if such signatures
were upon the same instrument.


<PAGE>

Delivery of an executed  counterpart hereof via telecopier shall be as effective
as delivery of a manually executed counterpart hereof.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


<PAGE>


Please  evidence  your  acknowledgment  of and  agreement  to the  foregoing  by
executing and delivering to Levin & Srinivasan LLP,  counsel to the undersigned,
by telecopier at (212) 957-4565 a counterpart hereof.

                                            Very truly yours,

                                            ERHC INVESTMENT GROUP LLC

                                            By: /s/ HOWARD D. TALKS
                                            ------------------------------------
                                                 Howard D. Talks
                                                 Member

ACKNOWLEDGED AND AGREED
as of April 27, 1999:

ENVIRONMENTAL REMEDIATION
HOLDING CORPORATION

By: /s/ JAMES A. GRIFFIN
- ------------------------
Name: James A. Griffin
Title: Secretary




<PAGE>



                          ERHC INVESTMENT GROUP II LLC
                             c/o Corporate Builders
                       777 South Flagler Drive, Suite 909
                         West Palm Beach, Florida 33401

                              As of April 27, 1999

Environmental Remediation
Holding Corporation
3-5 Aubry Lane
Oyster Bay, New York  11753
Attention:  President

Re:   Subscription Agreement

Ladies and Gentlemen:

We refer to the  letter of  intent,  dated as of April 8, 1999 (the  "Letter  of
Intent"), between ERHC Investment Group, Inc., a corporation organized under the
laws of the  State of  Florida  ("Investment  Group  Inc."),  and  Environmental
Remediation Holding Corporation,  a corporation  organized under the laws of the
State of Colorado (the "Company"),  pursuant to which the Company agreed,  among
other things:  (i) to issue to Investment  Group Inc. or its assignees in one or
more  transactions  validly issued,  fully paid, and  nonassessable  shares (the
"Shares")  of common  stock,  par value  $.0001 per share,  of the Company  (the
"Common  Stock")  representing  fifty-one  percent of the issued and outstanding
capital stock of the Company on a fully-diluted basis after giving effect to all
of the transactions contemplated by the Letter of Intent; and (ii) to enter into
a definitive securities purchase agreement (the "Securities Purchase Agreement")
with  respect to such  issuances  of Common  Stock.  This letter  agreement  (as
amended,   supplemented,   or  otherwise   modified  from  time  to  time,  this
"Agreement"),  is intended to set forth the mutual  understanding  and agreement
between ERHC  Investment  Group II LLC, a limited  liability  company  organized
under the laws of the State of Delaware ("Investor"), the assignee of certain of
Investment  Group  Inc.'s  rights  under the Letter of Intent,  and the  Company
regarding  Investor's  subscription  for a portion  of the  Shares  prior to the
execution  and  delivery of the  Securities  Purchase  Agreement  by the parties
thereto.   In   consideration   of   the   respective   agreements,   covenants,
representations,  and  warranties  hereinafter  set  forth  and  other  good and
valuable   consideration,   the  receipt  and   adequacy  of  which  are  hereby
acknowledged,  and  intending to be legally  bound  hereby,  the parties  hereto
hereby agree as follows:

Investor hereby irrevocably subscribes for the portion of the Shares (the "Group
II Shares")  representing  27.195 percent of the issued and outstanding  capital
stock of the Company on a fully-diluted  basis after giving effect to all of the
transactions  contemplated  by the  Letter of  Intent,  and  Investor  shall pay
therefor  in  lawful  money  of the  United  States  of  America  in one or more
installments  from time to time  after the date  hereof in  accordance  with the
terms and  conditions of the Letter of Intent  $2,625,000 in the aggregate  (the
"Purchase  Price").  Notwithstanding  anything to the contrary contained herein,
the  obligations of Investor and the Company  hereunder  shall be subject in all
respects to the execution and delivery of the Securities  Purchase Agreement and
the other terms and conditions of the Letter of Intent.

As an inducement to the Company to enter into this  Agreement,  Investor  hereby
represents and warrants to the Company that:

                    (i) Investor has duly executed and delivered this agreement,
                    and  (assuming  due  execution  and delivery by the Company)
                    this  agreement  constitutes  a legal,  valid,  and  binding
                    obligation  of  Investor,  enforceable  against  Investor in
                    accordance with its terms;

                    (ii) Investor's execution,  delivery, and performance hereof
                    do not and will not: (A) violate or conflict with Investor's
                    certificate   of   formation   or   similar   organizational
                    documents,   or  any  law  or  any  order,  writ,  judgment,
                    injunction,  decree,  stipulation,  determination,  or award
                    entered by or with any governmental authority and applicable
                    to Investor;  (B) violate or infringe upon any rights of any
                    person; or (C) require any consent, approval, authorization,
                    or other order of, action by,  filing with, or  notification
                    to, any governmental authority or any other person; and

                    (iii) Investor understands that the Group II Shares have not
                    been  registered  under  the  Securities  Act  of  1933,  as
                    amended,  or the  laws of any  state  and may not be sold or
                    transferred,  or otherwise disposed of, without registration
                    under the  Securities Act and  applicable  state  securities
                    laws, or pursuant to an exemption therefrom.

                    As an inducement  to Investor to enter into this  Agreement,
                    the Company  hereby  represents  and warrants to Investor as
                    follows:

                    (i)  The  Company  has  duly  executed  and  delivered  this
                    agreement,  and  (assuming  due  execution  and  delivery by
                    Investor) this  agreement  constitutes a legal,  valid,  and
                    binding obligation of the Company,  enforceable  against the
                    Company in accordance with its terms;

                    (ii) The  Company's  execution,  delivery,  and  performance
                    hereof do not and will not: (A) violate or conflict with the
                    Company's  articles of  incorporation  or by-laws or similar
                    organizational  documents,  or any law or any  order,  writ,
                    judgment, injunction, decree, stipulation, determination, or
                    award  entered  by or with any  governmental  authority  and
                    applicable to the Company;  (B) violate or infringe upon any
                    rights of any person; or (C) require any consent,  approval,
                    authorization, or other order of, action by, filing with, or
                    notification  to, any  governmental  authority  or any other
                    person; and

                    (iii)  Upon  issuance,  the Group II Shares  will be validly
                    issued,  fully  paid,  and  nonassessable  and  will  not be
                    subject to any  preemptive  rights,  and will  represent not
                    less than  27.195  percent  of the  issued  and  outstanding
                    capital stock of the Company on a fully-diluted  basis after
                    giving effect to all of the transactions contemplated by the
                    Letter of Intent.

                    No  amendment  hereof or  supplement  or other  modification
                    hereto, and no consent to, or waiver,  discharge, or release
                    of, any term or provision or breach  hereof,  shall be valid
                    or effective  unless such  amendment,  supplement,  or other
                    modification,   or  such  consent,  waiver,   discharge,  or
                    release,  is in writing,  expressly  refers  hereto,  and is
                    signed by the party to be bound thereby.

If any term or other  provision  hereof is  determined by any court of competent
jurisdiction to be invalid,  illegal,  or  unenforceable  in whole or in part by
reason of any applicable law or public policy,  and such  determination  becomes
final and nonappealable, such term or other provision shall remain in full force
and effect to the  fullest  extent  permitted  by law,  and all other  terms and
provisions hereof shall remain in full force and effect in their entirety.

This  Agreement  shall be governed by, and  construed and enforced in accordance
with, the laws of the State of New York.

Each party hereto hereby  unconditionally  and  irrevocably  waives all right to
trial by jury in any action,  suit,  or proceeding  (whether  based on contract,
tort, or otherwise) based upon,  resulting from,  arising out of, or relating to
this Agreement or any transaction or agreement contemplated hereby.

This  Agreement  may  be  executed  in any  number  of  counterparts  and by the
different parties hereto in separate  counterparts,  each of which when executed
shall be  deemed  to be an  original,  and all of  which  taken  together  shall
constitute one and the same agreement with the same effect as if such signatures
were upon the same instrument.

Delivery of an executed  counterpart hereof via telecopier shall be as effective
as delivery of a manually executed counterpart hereof.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


<PAGE>

Please  evidence  your  acknowledgment  of and  agreement  to the  foregoing  by
executing and delivering to Levin & Srinivasan LLP,  counsel to the undersigned,
by telecopier at (212) 957-4565 a counterpart hereof.

                                            Very truly yours,

                                            ERHC INVESTMENT GROUP II LLC

                                            By: /s/ HOWARD D. TALKS
                                            -----------------------
                                                Howard D. Talks
                                                Managing Member

ACKNOWLEDGED AND AGREED
as of April 27, 1999:

ENVIRONMENTAL REMEDIATION
HOLDING CORPORATION

By: /s/ JAMES A. GRIFFIN
- ------------------------
Name: James A. Griffin
Title: Secretary




<PAGE>



                           ERHC INVESTMENT GROUP A LLC
                             c/o Corporate Builders
                       777 South Flagler Drive, Suite 909
                         West Palm Beach, Florida 33401

                              As of April 27, 1999

Environmental Remediation
Holding Corporation
3-5 Aubry Lane
Oyster Bay, New York  11753
Attention:  President

Re:   Subscription Agreement

Ladies and Gentlemen:

We refer to the  letter of  intent,  dated as of April 8, 1999 (the  "Letter  of
Intent"), between ERHC Investment Group, Inc., a corporation organized under the
laws of the  State of  Florida  ("Investment  Group  Inc."),  and  Environmental
Remediation Holding Corporation,  a corporation  organized under the laws of the
State of Colorado (the "Company"),  pursuant to which the Company agreed,  among
other things:  (i) to issue to Investment  Group Inc. or its assignees in one or
more  transactions  validly issued,  fully paid, and  nonassessable  shares (the
"Shares")  of common  stock,  par value  $.0001 per share,  of the Company  (the
"Common  Stock")  representing  fifty-one  percent of the issued and outstanding
capital stock of the Company on a fully-diluted basis after giving effect to all
of the transactions contemplated by the Letter of Intent; and (ii) to enter into
a definitive securities purchase agreement (the "Securities Purchase Agreement")
with  respect to such  issuances  of Common  Stock.  This letter  agreement  (as
amended,   supplemented,   or  otherwise   modified  from  time  to  time,  this
"Agreement"),  is intended to set forth the mutual  understanding  and agreement
between ERHC Investment Group A LLC, a limited liability company organized under
the laws of the State of  Delaware  ("Investor"),  the  assignee  of  certain of
Investment  Group  Inc.'s  rights  under the Letter of Intent,  and the  Company
regarding  Investor's initial  subscription for a portion of the Shares prior to
the execution and delivery of the Securities  Purchase  Agreement by the parties
thereto.   In   consideration   of   the   respective   agreements,   covenants,
representations,  and  warranties  hereinafter  set  forth  and  other  good and
valuable   consideration,   the  receipt  and   adequacy  of  which  are  hereby
acknowledged,  and  intending to be legally  bound  hereby,  the parties  hereto
hereby agree as follows:

Investor  hereby  irrevocably  subscribes  for the  portion of the  Shares  (the
"Initial  Shares")  representing  2.805  percent of the  issued and  outstanding
capital stock of the Company on a fully-diluted basis after giving effect to all
of the transactions contemplated by the Letter of Intent, and Investor shall pay
therefor  in lawful  money of the  United  States of  America  contemporaneously
herewith $165,000 in the aggregate (the "Purchase Price").  Upon payment in full
of the Purchase  Price,  the Company shall issue to Investor the Initial Shares,
and  shall  deliver  or cause to be  delivered  to  Investor  a  certificate  or
certificates evidencing such Initial Shares.

Upon the execution and delivery of the Securities Purchase Agreement,  the terms
and provisions of the Securities  Purchase  Agreement shall apply to the Initial
Shares  subscribed  for  and  purchased  hereby,   and  the  other  transactions
contemplated by this Agreement.

As an inducement to the Company to enter into this  Agreement,  Investor  hereby
represents and warrants to the Company that:

                    (i) Investor has duly executed and delivered this agreement,
                    and  (assuming  due  execution  and delivery by the Company)
                    this  agreement  constitutes  a legal,  valid,  and  binding
                    obligation  of  Investor,  enforceable  against  Investor in
                    accordance with its terms;

                    (ii) Investor's execution,  delivery, and performance hereof
                    do not and will not: (A) violate or conflict with Investor's
                    certificate   of   formation   or   similar   organizational
                    documents,   or  any  law  or  any  order,  writ,  judgment,
                    injunction,  decree,  stipulation,  determination,  or award
                    entered by or with any governmental authority and applicable
                    to Investor;  (B) violate or infringe upon any rights of any
                    person; or (C) require any consent, approval, authorization,
                    or other order of, action by,  filing with, or  notification
                    to, any governmental authority or any other person; and

                    (iii) Investor  understands that the Initial Shares have not
                    been  registered  under  the  Securities  Act  of  1933,  as
                    amended,  or the  laws of any  state  and may not be sold or
                    transferred,  or otherwise disposed of, without registration
                    under the  Securities Act and  applicable  state  securities
                    laws, or pursuant to an exemption therefrom.

                    As an inducement  to Investor to enter into this  Agreement,
                    the Company  hereby  represents  and warrants to Investor as
                    follows:

                    (i)  The  Company  has  duly  executed  and  delivered  this
                    agreement,  and  (assuming  due  execution  and  delivery by
                    Investor) this  agreement  constitutes a legal,  valid,  and
                    binding obligation of the Company,  enforceable  against the
                    Company in accordance with its terms;

                    (ii) The  Company's  execution,  delivery,  and  performance
                    hereof do not and will not: (A) violate or conflict with the
                    Company's  articles of  incorporation  or by-laws or similar
                    organizational  documents,  or any law or any  order,  writ,
                    judgment, injunction, decree, stipulation, determination, or
                    award  entered  by or with any  governmental  authority  and
                    applicable to the Company;  (B) violate or infringe upon any
                    rights of any person; or (C) require any consent,  approval,
                    authorization, or other order of, action by, filing with, or
                    notification  to, any  governmental  authority  or any other
                    person; and

                    (iii) Upon  issuance,  the  Initial  Shares  will be validly
                    issued,  fully  paid,  and  nonassessable  and  will  not be
                    subject to any  preemptive  rights,  and will  represent not
                    less  than  2.805  percent  of the  issued  and  outstanding
                    capital stock of the Company on a fully-diluted  basis after
                    giving effect to all of the transactions contemplated by the
                    Letter of Intent.

                    No  amendment  hereof or  supplement  or other  modification
                    hereto, and no consent to, or waiver,  discharge, or release
                    of, any term or provision or breach  hereof,  shall be valid
                    or effective  unless such  amendment,  supplement,  or other
                    modification,   or  such  consent,  waiver,   discharge,  or
                    release,  is in writing,  expressly  refers  hereto,  and is
                    signed by the party to be bound thereby.

If any term or other  provision  hereof is  determined by any court of competent
jurisdiction to be invalid,  illegal,  or  unenforceable  in whole or in part by
reason of any applicable law or public policy,  and such  determination  becomes
final and nonappealable, such term or other provision shall remain in full force
and effect to the  fullest  extent  permitted  by law,  and all other  terms and
provisions hereof shall remain in full force and effect in their entirety.

This  Agreement  shall be governed by, and  construed and enforced in accordance
with, the laws of the State of New York.

Each party hereto hereby  unconditionally  and  irrevocably  waives all right to
trial by jury in any action,  suit,  or proceeding  (whether  based on contract,
tort, or otherwise) based upon,  resulting from,  arising out of, or relating to
this Agreement or any transaction or agreement contemplated hereby.

This  Agreement  may  be  executed  in any  number  of  counterparts  and by the
different parties hereto in separate  counterparts,  each of which when executed
shall be  deemed  to be an  original,  and all of  which  taken  together  shall
constitute one and the same agreement with the same effect as if such signatures
were upon the same instrument.

Delivery of an executed  counterpart hereof via telecopier shall be as effective
as delivery of a manually executed counterpart hereof.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


<PAGE>


Please  evidence  your  acknowledgment  of and  agreement  to the  foregoing  by
executing and delivering to Levin & Srinivasan LLP,  counsel to the undersigned,
by telecopier at (212) 957-4565 a counterpart hereof.

                                            Very truly yours,

                                            ERHC INVESTMENT GROUP A LLC

                                            By:  ERHC INVESTMENT GROUP II LLC,
                                                   as managing member

                                            By: /s/ HOWARD D. TALKS
                                            ------------------------------------
                                                    Howard D. Talks
                                                    Managing Member

ACKNOWLEDGED AND AGREED
as of April 27, 1999:

ENVIRONMENTAL REMEDIATION
HOLDING CORPORATION

By: /s/ JAMES A. GRIFFIN
- ------------------------
Name: James A. Griffin
Title: Secretary




<PAGE>




                             JOINT FILING AGREEMENT

Each of the  undersigned  hereby agree that the statement on Schedule 13D, dated
May 21, 1999 (the  "Statement"),  with  respect to the common  stock,  par value
$.0001 per share, of Environmental Remediation Holding Corporation,  is, and any
amendments  thereto by each of the undersigned shall be, filed on behalf of each
of the  undersigned  pursuant to and in accordance  with Rule 13d-1  promulgated
under the Securities  Exchange Act of 1934, as amended,  and that this agreement
shall be included as an exhibit to the Statement and each such  amendment.  Each
of the undersigned  hereby agree that it is responsible for the timely filing of
the Statement and any amendments thereto,  and for the completeness and accuracy
of the information  concerning itself contained  therein.  This agreement may be
executed in two or more counterparts, each of which shall be deemed an original,
and all of which together shall constitute one and the same instrument.

IN WITNESS WHEREOF,  the undersigned have executed or caused to be executed this
agreement as of May 21, 1999.

                                           ERHC INVESTMENT GROUP LLC

Dated May 21, 1999:                        By: /s/ HOWARD D. TALKS
                                           -------------------------------------
                                                   Howard D. Talks
                                                   Managing Member

                                           ERHC INVESTMENT GROUP II LLC

Dated May 21, 1999:                        By: /s/ HOWARD D. TALKS
                                           -------------------------------------
                                                   Howard D. Talks
                                                   Managing Member

                                           ERHC INVESTMENT GROUP A LLC

                                           By:  ERHC INVESTMENT GROUP II LLC

Dated May 21, 1999:                        By: /s/ HOWARD D. TALKS
                                           -------------------------------------
                                                    Howard D. Talks
                                                    Managing Member

                                           SAMOA LLC

Dated May 21, 1999:                        By: /s/ DANIEL LEVIN
                                           -------------------------------------
                                                    Daniel Levin
                                                    Member

Dated May 21, 1999:                            /s/ ERNEST D. CHU
                                           -------------------------------------
                                                    ERNEST D. CHU

Dated May 21, 1999:                            /s/ RENE EICHENBERGER
                                           -------------------------------------
                                                    RENE EICHENBERGER

Dated May 21, 1999:                            /s/ DANIEL LEVIN
                                           -------------------------------------
                                                    DANIEL LEVIN

Dated May 21, 1999                             /s/ GREGG SRINIVASAN
                                           -------------------------------------
                                                    GREGG SRINIVASAN

Dated May 21, 1999:                            /s/ HOWARD D. TALKS
                                           -------------------------------------
                                                    HOWARD D. TALKS

Dated May 21, 1999:                            /s/ NOREEN G. WILSON
                                           -------------------------------------
                                                    NOREEN G. WILSON



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