H E R C PRODUCTS INC
S-8, 1996-10-03
SPECIALTY CLEANING, POLISHING AND SANITATION PREPARATIONS
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     As filed with the Securities and Exchange Commission on October 3, 1996
                           Registration No. 333-_____
________________________________________________________________________________

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    Form S-8

                             REGISTRATION STATEMENT
                                      Under
                           THE SECURITIES ACT OF 1933


                         H.E.R.C. PRODUCTS INCORPORATED
             (Exact name of registrant as specified in its charter)

          Delaware                                              86-0570800
  State or Jurisdiction of                                   (I.R.S. Employer
Incorporation or Organization                             Identification Number)

                             3622 NORTH 34TH AVENUE
                             PHOENIX, ARIZONA 85017
                    (Address of principal executive offices)

                            1993 INCENTIVE STOCK PLAN
                          1996 PERFORMANCE EQUITY PLAN
                                       AND
                          OTHER EMPLOYEE BENEFIT PLANS
                            (Full title of the Plans)

                           GARY S. GLATTER, President
                         H.E.R.C. Products Incorporated
                             3622 North 34th Avenue
                             Phoenix, Arizona 85017
                                 (602) 233-2212
 (Name, address and telephone number, including area code, of agent for service)

                                 with a copy to:

                             DAVID ALAN MILLER, ESQ.
                            Graubard Mollen & Miller
                                600 Third Avenue
                          New York, New York 10016-2097
                                 (212) 818-8800

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
====================================================================================================================================
                                                                              Proposed
                                                                              maximum          Proposed maximum        Amount of
              Title of Securities                     Amount to be         offering price          aggregate          registration
                to be registered                       registered            per share          offering price            fee
====================================================================================================================================
<S>                                                    <C>                      <C>              <C>                    <C>    
                                                        13,000 shares           $1.875
Common Stock issuable upon exercise of options          50,000 shares           $1.9375
granted and outstanding under the Registrant's         205,000 shares           $2.50              $938,750.00          $323.71
1993 Incentive Stock Option Plan ("1993                 80,000 shares           $3.6875
Plan")(1)                                                2,000 shares           $5.00
- ------------------------------------------------------------------------------------------------------------------------------------
Common Stock issuable upon exercise of options
granted and outstanding under the Registrant's         410,000 shares           $1.75              $741,250.00          $255.60
1996 Performance Equity Plan ("1996 Plan")(2)           10,000 shares           $2.375
- ------------------------------------------------------------------------------------------------------------------------------------
Common Stock issuable upon exercise of options         580,000 shares           $2.6875          $1,558,750.00          $537.50
which may be granted under the 1996 Plan(3)
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
====================================================================================================================================
                                                                              Proposed
                                                                              maximum          Proposed maximum        Amount of
              Title of Securities                     Amount to be         offering price          aggregate          registration
                to be registered                       registered            per share          offering price            fee
====================================================================================================================================
<S>                                                    <C>                      <C>              <C>                    <C>    
                                                        40,000 shares           $1.50
                                                        50,000 shares           $1.5625
                                                        80,000 shares           $1.9375
Common Stock issuable upon exercise of options          50,000 shares           $2.0625
and other stock-based awards granted and               200,000 shares           $2.50            $2,333,750.00          $798.83
outstanding under other employee benefit plans         100,000 shares           $3.125
("Benefit Plans")(4)                                   100,000 shares           $3.625
                                                       150,000 shares           $3.75
                                                        50,000 shares           $4.00
- ------------------------------------------------------------------------------------------------------------------------------------
         TOTAL                                                                                                        $1,915.64
====================================================================================================================================
</TABLE>

(1)      Represents the exercise  prices payable for the 350,000 shares that may
         be acquired under  outstanding  options  granted under the 1993 Plan in
         accordance  with Rule 457(h)  promulgated  under the  Securities Act of
         1933, as amended ("Securities Act").

(2)      Represents  the  exercise  price  payable  for the  shares  that may be
         acquired under outstanding options granted pursuant to the 1996 Plan in
         accordance with Rule 457(h) promulgated under the Securities Act.

(3)      Based on the last sale price of the  Common  Stock as  reported  by The
         Nasdaq Stock Market on October 1, 1996 in accordance  with Rules 457(c)
         and 457(h) promulgated under the Securities Act.

(4)      Represents the exercise  prices payable for the 820,000 shares that may
         be acquired under  outstanding  options granted pursuant to the Benefit
         Plans in accordance with Rule 457(h)  promulgated  under the Securities
         Act.

                              _____________________


         In accordance  with the  provisions of Rule 462  promulgated  under the
Securities  Act, the  Registration  Statement will become  effective upon filing
with the Securities and Exchange Commission.

         The  Registration  Statement,  including all exhibits and  attachments,
contains  66  pages.  The  exhibit  index  may be  found  on  page  II-7  of the
consecutively numbered pages of the Registration Statement.

                              _____________________
<PAGE>
                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Item 1.   Plan Information *

Item 2.   Registrant Information and Plan Annual Information *







*        Information  required by Part I to be  contained  in the Section  10(a)
         prospectus  is omitted from this  Registration  Statement in accordance
         with Rule 428 under the  Securities  Act, and the Note to Part I of the
         Instructions to Form S-8.
<PAGE>
                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Incorporation of Documents by Reference.

         The following  documents  previously  filed by the Registrant  with the
Securities  and Exchange  Commission  (the  "Commission")  are  incorporated  by
reference in this Registration Statement:

         (a)      The  Registrant's  Annual Report on Form 10-KSB for the fiscal
                  year  ended  December  31,  1995  filed  with  the  Commission
                  pursuant to Section  13(a) of the  Securities  Exchange Act of
                  1934 (the "Exchange Act");

         (b)      The  Registrant's  Quarterly  Reports  on Form  10-QSB for the
                  fiscal  quarters  ended March 31, 1996 and June 30, 1996 filed
                  with the Commission  pursuant to Section 13(a) of the Exchange
                  Act;

         (c)      The Registrant's Current Reports on Form 8-K dated February 5,
                  1996 and July 1, 1996 filed with the  Commission  pursuant  to
                  Section 13(a) of the Exchange Act;

         (d)      The Registrant's  Proxy Statement dated June 11, 1996 relating
                  to  the  Annual  Meeting  of   Stockholders   filed  with  the
                  Commission pursuant to Section 14 of the Exchange Act;

         (e)      All other  reports filed by the  Registrant  after the date of
                  this  Registration  Statement with the Commission  pursuant to
                  Section 13(a) or 15(d) of the Exchange Act; and

         (f)      The   description  of  the  Common  Stock   contained  in  the
                  Registrant's  8-A   Registration   Statement  filed  with  the
                  Commission  pursuant  to Section  12(g) of the  Exchange  Act,
                  including any subsequent  amendment(s)  or report(s) filed for
                  purpose of updating such description.

         All documents subsequently filed by the Registrant pursuant to Sections
13(a),  13(c),  14 and  15(d) of the  Exchange  Act,  prior to the  filing  of a
post-effective  amendment which indicates that all securities  offered have been
sold or which deregisters all securities then remaining unsold,  shall be deemed
to be incorporated by reference in this Registration  Statement and to be a part
hereof  from the  respective  date of filing of such  documents.  Any  statement
contained  in a  document  incorporated  by  reference  herein  is  modified  or
superseded  for all  purposes to the extent that a statement  contained  in this
Registration  Statement or in any other  subsequently  filed  document  which is
incorporated by reference modifies or replaces such statement.


Item 4.  Description of Securities.

         The Common Stock of the  Registrant is  registered  under Section 12 of
the Exchange Act.


Item 5.  Interests of Named Experts and Counsel.

         Not applicable.


Item 6.  Indemnification of Directors and Officers.

         The  Registrant's   Certificate  of  Incorporation  provides  that  all
directors, officers, employees and agents of the Registrant shall be entitled to
be indemnified  by the  Registrant to the fullest  extent  permitted by law. The
Certificate of Incorporation also provides as follows:
                                      II-1
<PAGE>
                  A  director,  or former  director,  shall not be liable to the
         corporation  or to any of its  stockholders  for  monetary  damages for
         breach of fiduciary  duty as a director,  provided that this  provision
         shall not eliminate or limit the  liability of a director:  (i) for any
         breach of the  director's  duty of  loyalty to the  corporation  or its
         stockholders;  (ii) for acts or  omissions  not in good  faith or which
         involve  intentional  misconduct or a knowing  violation of law;  (iii)
         under ss.174 of the General  Corporation  Law of the State of Delaware,
         pertaining  to the  liability  of  directors  for  unlawful  payment of
         dividends or unlawful  stock  purchase or  redemption;  or (iv) for any
         transaction  from  which the  director  derived  an  improper  personal
         benefit.

         Section  145  of  the  Delaware  General   Corporation  Law  concerning
indemnification of officers, directors, employees and agents is set forth below.

         "Section 145.  Indemnification  of  officers, directors, employees  and
agents; insurance.

         (a) A corporation  may indemnify any person who was or is a party or is
threatened to be made a party to any  threatened,  pending or completed  action,
suit or proceeding,  whether civil,  criminal,  administrative  or investigative
(other  than an action by or in the right of the  corporation)  by reason of the
fact  that  he  is or  was  a  director,  officer,  employee  or  agent  of  the
corporation,  or is or was  serving  at the  request  of  the  corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other  enterprise,  against  expenses  (including  attorneys'
fees),  judgments,  fines and amounts paid in settlement actually and reasonably
incurred by him in connection  with such action,  suit or proceeding if he acted
in good faith and in a manner he reasonably  believed to be in or not opposed to
the best interests of the corporation,  and, with respect to any criminal action
or proceeding,  had no reasonable cause to believe his conduct was unlawful. The
termination of any action,  suit or proceeding by judgment,  order,  settlement,
conviction,  or upon a plea of nolo contendere or its equivalent,  shall not, of
itself,  create a presumption that the person did not act in good faith and in a
manner  which  he  reasonably  believed  to be in or not  opposed  to  the  best
interests  of the  corporation,  and with  respect  to any  criminal  action  or
proceeding, had reasonable cause to believe that his conduct was unlawful.

         (b) A corporation  may indemnify any person who was or is a party or is
threatened to be made a party to any threatened,  pending or completed action or
suit by or in the right of the  corporation  to procure a judgement in its favor
by reason of the fact that he is or was a director,  officer,  employee or agent
of the corporation,  or is or was serving at the request of the corporation as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other enterprise against expenses (including attorneys' fees)
actually  and  reasonably  incurred  by him in  connection  with the  defense or
settlement  of such  action or suit if he acted in good faith and in a manner he
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
corporation and except that no  indemnification  shall be made in respect of any
claim,  issue or matter as to which such person  shall have been  adjudged to be
liable  for  negligence  or  misconduct  in the  performance  of his duty to the
corporation  unless and only to the  extent  that the Court of  Chancery  or the
court in which such action or suit was brought shall determine upon  application
that, despite the adjudication of liability but in view of all the circumstances
of the case, such person is fairly and reasonably entitled to indemnity for such
expenses which the Court of Chancery or such other court shall deem proper.

         (c) To the extent  that a  director,  officer,  employee  or agent of a
corporation  has been  successful  on the merits or  otherwise in defense of any
action,  suit  or  proceeding  referred  to in  subsections  (a) and (b) of this
section,  or in  defense  of any  claim,  issue or matter  therein,  he shall be
indemnified against expenses (including attorneys' fees) actually and reasonably
incurred by him in connection therewith.

         (d) Any  indemnification  under  sections  (a) and (b) of this  section
(unless ordered by a court) shall be made by the corporation  only as authorized
in the specific case upon a determination that  indemnification of the director,
officer, employee or agent is proper in the circumstances because he has met the
applicable  standard  of conduct  set forth in  subsections  (a) and (b) of this
section.  Such  determination  shall be made (1) by the board of  directors by a
majority vote of a quorum consisting of
                                      II-2
<PAGE>
directors  who were not parties to such action,  suit or  proceeding,  or (2) if
such  a  quorum  is  not  obtainable,  or,  even  if  obtainable,  a  quorum  of
disinterested  directors so directs,  by independent  legal counsel in a written
opinion, or (3) by the stockholders.

         (e) Expenses incurred by an officer or director in defending a civil or
criminal  action,  suite or proceeding may be paid by the corporation in advance
of the final  disposition of such action,  suit or proceeding upon receipt of an
undertaking by or on behalf of such director or officer, to repay such amount if
it shall  ultimately be determined  that he is not entitled to be indemnified by
the corporation as authorized in this section.  Such expenses  incurred by other
employees and agents may be so paid upon such terms and  conditions,  if any, as
the board of directors deems appropriate.

         (f) The  indemnification  and  advancement of expenses  provided by, or
granted  pursuant to, the other  subsections of this section shall not be deemed
exclusive  of any  other  rights  to  which  those  seeking  indemnification  or
advancement  of expenses  may be entitled  under any bylaw,  agreement,  vote of
stockholders or disinterested  directors or otherwise,  both as to action in his
official  capacity  and as to action in  another  capacity  while  holding  such
office.

         (g) A corporation  shall have power to purchase and maintain  insurance
on behalf of any person who is or was  director,  officer,  employee or agent of
the  corporation,  or is or was serving at the request of the  corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other enterprise  against any liability  asserted against him
and incurred by him in any such capacity,  or arising out of his status as such,
whether or not the  corporation  would have the power to  indemnify  him against
such liability under this section.

         (h) For purposes of this section, references to "the corporation" shall
include, in addition to the resulting corporation,  any constituent  corporation
(including  any  constituent of a constituent)  absorbed in a  consolidation  or
merger which, if its separate existence had continued,  would have had power and
authority to indemnify its directors, officers, and employees or agents, so that
any  person  who is or was a  director,  officer,  employee  or  agent  of  such
constituent corporation, or is or was serving at the request of such constituent
corporation as a director,  officer,  employee or agent of another  corporation,
partnership,  joint venture, trust or other enterprise,  shall stand in the same
position  under  this  section  with  respect  to  the  resulting  or  surviving
corporation as he would have with respect to such constituent corporation if its
separate existence had continued.

         (i) For purposes of this  section,  references  to "other  enterprises"
shall include  employee  benefit plans;  references to "fines" shall include any
excise taxes assessed on a person with respect to an employee  benefit plan; and
references  to  "serving at the request of the  corporation"  shall  include any
service as a  director,  officer,  employee  or agent of the  corporation  which
imposes duties on, or involves services by, such director,  officer, employee or
agent  with  respect  to  an  employee   benefit  plan,  its   participants   or
beneficiaries; and a person who acted in good faith an in a manner he reasonably
believed  to be in the  interest of the  participants  and  beneficiaries  of an
employee  benefit plan shall be deemed to have acted in a manner "not opposed to
the best interests of the corporation" as referred to in this section.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933, as amended (the  "Securities  Act"), may be permitted to directors,
officers,  and controlling  persons of the Registrant  pursuant to the foregoing
provisions, or otherwise, the Registrant has been advised that in the opinion of
the Securities and Exchange  Commission such  indemnification  is against public
policy as expressed in the Securities Act and is, therefore,  unenforceable.  In
the event that a claim for indemnification  against such liabilities (other than
the  payment by the  Registrant  of  expenses  incurred  or paid by a  director,
officer or controlling  person of the Registrant in a successful  defense of any
action, suit or proceeding) is asserted by such director, officer or controlling
person in connection with the securities being registered,  the Registrant will,
unless in the opinion of its counsel the matter has been settled by  controlling
precedent,  submit to the court of appropriate jurisdiction the question whether
such  indemnification  by it is  against  public  policy  as  expressed  in  the
Securities Act and will be governed by the final adjudication of such issue.
                                      II-3
<PAGE>
Item 7.  Exemption from Registration Claimed.

         Not applicable.

Item 8.  Exhibits.

         Exhibit No.           Description
         -----------           -----------

         4.1                   1993 Incentive Stock Option Plan (incorporated by
                               reference  from Exhibit 10.3 of the  Registrant's
                               Registration   Statement   on  Form   SB-2,   No.
                               33-75166)

         4.2*                  Amendment to 1993 Stock Option Plan,  dated as of
                               September 23, 1994.

         4.3*                  1996 Performance Equity Plan of the Registrant

         4.4                   Stock  Option   Agreement  for  the  purchase  of
                               400,000 shares between the Registrant and Gary S.
                               Glatter  (incorporated  by reference from Exhibit
                               10.5 of the Registrant's  Registration  Statement
                               on Form SB-2, No. 33-75166)

         4.5*                  Stock  Option   Agreement  for  the  purchase  of
                               100,000  shares between the Registrant and Jerome
                               Ludwig

         4.6*                  Stock  Option   Agreement  for  the  purchase  of
                               100,000  shares  between the Registrant and Jules
                               Firetag

         4.7*                  Stock Option Agreement for the purchase of 40,000
                               shares between the Registrant and Martin Plishka

         4.8*                  Stock Option Agreement for the purchase of 40,000
                               shares between the Registrant and Myron Shenkiryk

         4.9*                  Stock Option Agreement for the purchase of 50,000
                               shares between the Registrant and Kenneth Bright

         4.10*                 Stock Option Agreement for the purchase of 40,000
                               shares between the Registrant and Darin Thomas

         4.11*                 Stock Option Agreement for the purchase of 50,000
                               shares between the Registrant and Patrick Lien

         5.1*                  Opinion of Graubard Mollen & Miller

         23.1*                 Consent   of  BDO   Seidman,   LLP,   independent
                               accountant for Registrant

         23.2*                 Consent of Graubard Mollen & Miller  (included in
                               Exhibit 5.1)

_______________________________

*        Filed herewith.
                                      II-4
<PAGE>
Item 9.  Undertakings.

         (a)      The undersigned Registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
being made, a post-effective amendment to this Registration Statement;

                            (i) To include  any  prospectus  required by Section
         10(a)(3) of the Securities Act;

                           (ii) To reflect in the prospectus any facts or events
         arising after the effective date of the Registration  Statement (or the
         most recent effective amendment thereof) which,  individually or in the
         aggregate,  represent a fundamental change in the information set forth
         in the Registration Statement;

                           (iii)  To  include  any  material   information  with
         respect to the plan of  distribution  not  previously  disclosed in the
         Registration  Statement or any material  change to such  information in
         the Registration Statement;

Provided,  however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
Registration  Statement is on Form S-3 or Form S-8, and the information required
to be included in a post-effective amendment by those paragraphs is contained in
periodic  reports filed by the  Registrant  pursuant to Section 13(a) or Section
15(d) of the Exchange Act that are incorporated by reference in the Registration
Statement.

                  (2) That, for the purpose of determining  any liability  under
the Securities Act, each such  post-effective  amendment shall be deemed to be a
new registration  statement relating to the securities offered therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

                  (3) To remove from  registration by means of a  post-effective
amendment  any of the  securities  being  registered  which remain unsold at the
termination of the offering.

         (b) The undersigned  Registrant hereby undertakes that, for purposes of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
Registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Exchange Act (and where  applicable,  each filing of an employee  benefit plan's
annual  report   pursuant  to  Section  15(d)  of  the  Exchange  Act)  that  is
incorporated by reference in the Registration  Statement shall be deemed to be a
new registration  statement relating to the securities offered therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

         (c) Insofar as  indemnification  for liabilities  arising under the Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
Registrant pursuant to the foregoing  procedures,  or otherwise,  the Registrant
has been advised that in the opinion of the Commission such  indemnification  is
against  public  policy as expressed in the  Securities  Act and is,  therefore,
unenforceable.  In the  event  that a claim  for  indemnification  against  such
liabilities  (other than the payment by the  Registrant of expenses  incurred or
paid by a  director,  officer or  controlling  person of the  Registrant  in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as  expressed  in the  Securities  Act and will be  governed by the final
adjudication of such issue.
                                      II-5
<PAGE>
                                   SIGNATURES

         Pursuant to the  requirements  of the  Securities  Act, the  Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-8 and has  duly  caused  this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in Phoenix, Arizona, on this 3rd day of October, 1996.

                                      H.E.R.C. PRODUCTS INCORPORATED


                                      By:      /s/ S. Steven Carl
                                         ---------------------------------------
                                         S. Steven Carl, Chief Executive Officer


                                POWER OF ATTORNEY

         KNOW  ALL MEN BY THESE  PRESENTS,  that  each  person  whose  signature
appears  below  constitutes  and appoints S. Steven Carl and Gary S. Glatter his
true and lawful attorneys-in-fact and agents, each acting alone, with full power
of substitution and resubstitution, for him and in his name, place and stead, in
any and all  capacities,  to sign  any or all  amendments  to this  Registration
Statement,  including post-effective  amendments, and to file the same, with all
exhibits  thereto,  and  all  documents  in  connection   therewith,   with  the
Commission,  granting unto said  attorneys-in-fact and agents, and each of them,
full  power  and  authority  to do and  perform  each and  every  act and  thing
requisite and  necessary to be done in and about the  premises,  as fully to all
intents and purposes as he might or could do in person,  and hereby ratifies and
confirms all that said attorneys-in-fact and agents, each acting alone, or their
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

         Pursuant to the  requirements of the Securities Act, this  Registration
Statement has been signed by the following  persons in the capacities and on the
dates indicated.
<TABLE>
<CAPTION>
Signatures                                       Title                                        Date
- ----------                                       -----                                        ----

<S>                                              <C>                                          <C>
         /s/ S. Steven Carl                      Chairman of the Board, Chief                 October 3, 1996
- ----------------------------------------------
S. Steven Carl                                   Executive Officer and Director (Chief
                                                 Executive Officer)

         /s/ Gary S. Glatter                     President, Chief Operating Officer,          October 3, 1996
- ----------------------------------------------
Gary S. Glatter                                  Treasurer and Director (Principal
                                                 Financial and Accounting Officer)

         /s/ Jerome H. Ludwig                    Executive Vice President, Secretary          October 3, 1996
- ----------------------------------------------
Jerome H. Ludwig                                 and Director


         /s/ Shelby A. Carl                      Chairman Emeritus and Director               October 3, 1996
- ----------------------------------------------
Shelby A. Carl


         /s/ Robert M. Leopold                   Director                                     October 3, 1996
- ----------------------------------------------
Robert M. Leopold


         /s/ Salvatore T. DiMascio               Director                                     October 3, 1996
- ----------------------------------------------
Salvatore T. DiMascio
</TABLE>
                                      II-6
<PAGE>
                                    EXHIBITS


         Exhibit No.           Description
         -----------           -----------

         4.1                   1993 Incentive Stock Option Plan (incorporated by
                               reference  from Exhibit 10.3 of the  Registrant's
                               Registration   Statement   on  Form   SB-2,   No.
                               33-75166)
         
         4.2*                  Amendment to 1993 Stock Option Plan,  dated as of
                               September 23, 1994,
              
         4.3*                  1996 Performance Equity Plan of the Registrant
              
                               Stock  Option   Agreement  for  the  purchase  of
                               400,000 shares between the Registrant and Gary S.
                               Glatter  (incorporated  by reference from Exhibit
         4.4                   10.5 of the Registrant's  Registration  Statement
                               on Form SB-2, No. 33-75166)
              
         4.5*                  Stock  Option   Agreement  for  the  purchase  of
                               100,000  shares between the Registrant and Jerome
                               Ludwig
              
         4.6*                  Stock  Option   Agreement  for  the  purchase  of
                               100,000  shares  between the Registrant and Jules
                               Firetag
              
         4.7*                  Stock Option Agreement for the purchase of 40,000
                               shares between the Registrant and Martin Plishka
              
         4.8*                  Stock Option Agreement for the purchase of 40,000
                               shares between the Registrant and Myron Shenkiryk
              
         4.9*                  Stock Option Agreement for the purchase of 50,000
                               shares between the Registrant and Kenneth Bright
              
         4.10*                 Stock Option Agreement for the purchase of 40,000
                               shares between the Registrant and Darin Thomas
              
         4.11*                 Stock Option Agreement for the purchase of 50,000
                               shares between the Registrant and Patrick Lien
                
         5.1*                  Opinion of Graubard Mollen & Miller
         
         23.1*                 Consent   of  BDO   Seidman,   LLP,   independent
                               accountant for Registrant

         23.2*                 Consent of Graubard Mollen & Miller  (included in
                               Exhibit 5.1)

________________________________

*        Filed herewith.
                                      II-7

                                  AMENDMENT TO
                         H.E.R.C. PRODUCTS INCORPORATED
                        1993 INCENTIVE STOCK OPTION PLAN


Amendment to H.E.R.C.  Product  Incorporated  ("H.E.R.C.")  1993 Incentive Stock
Option Plan ("Plan") made as of September 23, 1994.

The Board of  Directors  of H.E.R.C.  met on  September  23, 1994 and decided to
amend  H.E.R.C.'s  Plan to allow for the granting  thereunder  of  non-incentive
stock options.

Accordingly,  the Plan is hereby amended by deleting Paragraph 5(e) therefrom in
its entirety and by substituting the following in lieu thereof:

         "(e)  Limitation on Grant of Options.  The aggregate  fair market value
(determined  as of the time the  option  is  granted)  of the  Stock as to which
incentive  options are  exercisable  for the first time by an eligible  employee
during any  calendar  year (under the Plan and under any other stock option plan
of the Company or any  subsidiary  of the Company)  shall not exceed One Hundred
Thousand Dollars  ($100,000).  Any amount over such $100,000  threshold shall be
considered non-qualified options."



                                       H.E.R.C. PRODUCTS INCORPORATED



                                       By: /s/  Gary S. Glatter
                                          ------------------------------------
                                                 Gary S. Glatter, President

                                                                     EXHIBIT 4.3

                                  Approved by Board of Directors on May 17, 1996
                                   Approved by Stockholders on ___________, 1996


                         H.E.R.C. PRODUCTS INCORPORATED

                          1996 Performance Equity Plan



Section 1.        Purpose; Definitions.

         1.1 Purpose.  The purpose of the H.E.R.C.  Products  Incorporated  (the
"Company") 1996 Performance Equity Plan (the "Plan") is to enable the Company to
offer to its key  employees,  officers,  directors and  consultants  whose past,
present and/or potential  contributions to the Company and its Subsidiaries have
been, are or will be important to the success of the Company,  an opportunity to
acquire a  proprietary  interest in the Company.  The various types of long-term
incentive awards which may be provided under the Plan will enable the Company to
respond to changes in compensation  practices,  tax laws, accounting regulations
and the size and diversity of its businesses.

         1.2      Definitions.  For  purposes  of the Plan, the following  terms
shall be defined as set forth
                  -----------
below:

                  1. "Agreement" means the agreement between the Company and the
Holder setting forth the terms and conditions of an award under the Plan.

                  2. "Board" means the Board of Directors of the Company.

                  3. "Code" means the Internal  Revenue Code of 1986, as amended
from time to time,  and any successor  thereto and the  regulations  promulgated
thereunder.

                  4.  "Committee"  means the Stock Option Committee of the Board
or any other committee of the Board, which the Board may designate to administer
the Plan or any portion  thereof.  If no  Committee is so  designated,  then all
references in this Plan to "Committee" shall mean the Board.

                  5. "Common  Stock" means the Common Stock of the Company,  par
value $.01 per share.

                  6.  "Company"   means  H.E.R.C.   Products   Incorporated,   a
corporation organized under the laws of the State of Delaware.

                  7. "Deferred Stock" means Stock to be received, under an award
made pursuant to Section 9, below, at the end of a specified deferral period.

                  8.   "Disability"   means   disability  as  determined   under
procedures established by the Committee for purposes of the Plan.

                  9. "Effective  Date" means the date set forth in Section 13.1,
below.

                  10.  "Fair Market  Value",  unless  otherwise  required by any
applicable provision of the Code or any regulations issued thereunder, means, as
of any given date:  (i) if the Common  Stock is listed on a national  securities
exchange or quoted on the Nasdaq National Market or Nasdaq SmallCap Market,  the
last sale  price of the Common  Stock in the  principal  trading  market for the
Common  Stock on the last  trading day  preceding  the date of grant of an award
hereunder, as reported by the exchange or Nasdaq,
<PAGE>
as the  case  may be;  (ii) if the  Common  Stock is not  listed  on a  national
securities  exchange or quoted on the Nasdaq  National Market or Nasdaq SmallCap
Market, but is traded in the over-the-counter  market, the closing bid price for
the Common Stock on the last trading day preceding the date of grant of an award
hereunder for which such  quotations  are reported by the OTC Bulletin  Board or
the  National  Quotation  Bureau,  Incorporated  or  similar  publisher  of such
quotations;  and (iii) if the fair market  value of the Common  Stock  cannot be
determined  pursuant  to clause (i) or (ii) above,  such price as the  Committee
shall determine, in good faith.

                  11.  "Holder"  means a person who has  received an award under
the Plan.

                  12.  "Incentive  Stock Option" means any Stock Option intended
to be and  designated  as an  "incentive  stock  option"  within the  meaning of
Section 422 of the Code.

                  13. "Nonqualified Stock Option" means any Stock Option that is
not an Incentive Stock Option.

                  14.  "Normal   Retirement"   means   retirement   from  active
employment with the Company or any Subsidiary on or after age 65.

                  15. "Other Stock-Based Award" means an award under Section 10,
below, that is valued in whole or in part by reference to, or is otherwise based
upon, Stock.

                  16. "Parent" means any present or future parent corporation of
the Company, as such term is defined in Section 424(e) of the Code.

                  17.  "Plan"  means the  H.E.R.C.  Products  Incorporated  1996
Performance Equity Plan, as hereinafter amended from time to time.

                  18.  "Restricted  Stock" means Stock,  received under an award
made pursuant to Section 8, below,  that is subject to  restrictions  under said
Section 8.

                  (s) "SAR Value"  means the excess of the Fair Market Value (on
the  exercise  date) of the  number of shares  for which the Stock  Appreciation
Right is  exercised  over the  exercise  price that the  participant  would have
otherwise  had to pay to exercise  the related  Stock  Option and  purchase  the
relevant shares.

                  (t) "Stock"  means the Common Stock of the Company,  par value
$.01 per share.

                  (u) "Stock Appreciation Right" means the right to receive from
the Company, on surrender of all or part of the related Stock Option,  without a
cash payment to the Company, a number of shares of Common Stock equal to the SAR
Value divided by the exercise price of the Stock Option.

                  (v) "Stock  Option" or  "Option"  means any option to purchase
shares of Stock which is granted pursuant to the Plan.

                  (w)  "Stock  Reload  Option"  means any option  granted  under
Section 6.3,  below, as a result of the payment of the exercise price of a Stock
Option and/or the  withholding tax related thereto in the form of Stock owned by
the Holder or the withholding of Stock by the Company.

                  (x)  "Subsidiary"  means  any  present  or  future  subsidiary
corporation  of the  Company,  as such term is defined in Section  424(f) of the
Code.
                                        2
<PAGE>
Section 2.        Administration.

         2.1 Committee  Membership.  The Plan shall be administered by the Board
or a Committee.  Committee members shall serve for such term as the Board may in
each case determine, and shall be subject to removal at any time by the Board.

         2.2 Powers of  Committee.  The Committee  shall have full  authority to
award,  pursuant  to the  terms of the  Plan:  (i)  Stock  Options,  (ii)  Stock
Appreciation  Rights,  (iii)  Restricted  Stock,  (iv) Deferred Stock, (v) Stock
Reload  Options  and/or  (vi)  Other   Stock-Based   Awards.   For  purposes  of
illustration  and not of  limitation,  the  Committee  shall have the  authority
(subject to the express provisions of this Plan):

                  (a) to select  the  officers,  key  employees,  directors  and
consultants  of the  Company  or any  Subsidiary  to whom Stock  Options,  Stock
Appreciation  Rights,  Restricted  Stock,  Deferred Stock,  Reload Stock Options
and/or Other Stock-Based Awards may from time to time be awarded hereunder.

                  (b) to determine the terms and  conditions,  not  inconsistent
with the terms of the Plan, of any award granted hereunder  (including,  but not
limited to, number of shares, share price, any restrictions or limitations,  and
any  vesting,  exchange,  surrender,  cancellation,  acceleration,  termination,
exercise or forfeiture provisions, as the Committee shall determine);

                  (c) to determine any specified performance goals or such other
factors  or  criteria  which  need to be  attained  for the  vesting of an award
granted hereunder;

                  (d) to determine the terms and  conditions  under which awards
granted hereunder are to operate on a tandem basis and/or in conjunction with or
apart from other  equity  awarded  under this Plan and cash  awards  made by the
Company or any Subsidiary outside of this Plan;

                  (e) to permit a Holder  to elect to defer a payment  under the
Plan under such rules and procedures as the Committee may  establish,  including
the  crediting  of  interest  on  deferred  amounts  denominated  in cash and of
dividend equivalents on deferred amounts denominated in Stock;

                  (f) to  determine  the extent and  circumstances  under  which
Stock and other  amounts  payable  with respect to an award  hereunder  shall be
deferred which may be either automatic or at the election of the Holder; and

                  (g) to substitute (i) new Stock Options for previously granted
Stock  Options,  which  previously  granted  Stock  Options  have higher  option
exercise prices and/or contain other less favorable  terms,  and (ii) new awards
of any  other  type  for  previously  granted  awards  of the same  type,  which
previously granted awards are upon less favorable terms.

         2.3      Interpretation of Plan.

                  (a) Committee  Authority.  Subject to Section 12,  below,  the
Committee   shall  have  the   authority   to  adopt,   alter  and  repeal  such
administrative  rules,  guidelines and practices governing the Plan as it shall,
from time to time, deem advisable,  to interpret the terms and provisions of the
Plan  and any  award  issued  under  the  Plan  (and to  determine  the form and
substance of all Agreements  relating thereto),  and to otherwise  supervise the
administration of the Plan.  Subject to Section 12, below, all decisions made by
the  Committee  pursuant  to the  provisions  of the  Plan  shall be made in the
Committee's  sole  discretion  and shall be final and binding  upon all persons,
including the Company, its Subsidiaries and Holders.

                  (b)  Incentive  Stock  Options.  Anything  in the  Plan to the
contrary notwithstanding, no term or provision of the Plan relating to Incentive
Stock Options (including but limited to Stock Reload
                                        3
<PAGE>
Options or Stock  Appreciation  rights granted in conjunction  with an Incentive
Stock  Option) or any Agreement  providing for Incentive  Stock Options shall be
interpreted,  amended or altered,  nor shall any discretion or authority granted
under the Plan be so exercised,  so as to disqualify  the Plan under Section 422
of the Code,  or, without the consent of the Holder(s)  affected,  to disqualify
any Incentive Stock Option under such Section 422.


Section 3.        Stock Subject to Plan.

         3.1  Number  of  Shares.  The total  number  of shares of Common  Stock
reserved  and  available  for  distribution  under the Plan  shall be  1,000,000
shares.  Shares of Stock  under the Plan may  consist,  in whole or in part,  of
authorized and unissued shares or treasury  shares.  If any shares of Stock that
have been  granted  pursuant  to a Stock  Option  cease to be subject to a Stock
Option,  or if any  shares of Stock that are  subject to any Stock  Appreciation
Right,  Restricted  Stock,  Deferred  Stock award,  Reload Stock Option or Other
Stock-Based  Award granted  hereunder are forfeited or any such award  otherwise
terminates without a payment being made to the Holder in the form of Stock, such
shares shall again be  available  for  distribution  in  connection  with future
grants and awards under the Plan. Only net shares issued upon a  stock-for-stock
exercise  (including stock used for withholding  taxes) shall be counted against
the number of shares available under the Plan.

         3.2 Adjustment Upon Changes in Capitalization, Etc. In the event of any
merger, reorganization, consolidation,  recapitalization, dividend (other than a
cash dividend),  stock split,  reverse stock split, or other change in corporate
structure  affecting the Stock, such substitution or adjustment shall be made in
the  aggregate  number of shares  reserved for issuance  under the Plan,  in the
number and  exercise  price of shares  subject to  outstanding  Options,  in the
number  of  shares  and  Stock   Appreciation  Right  price  relating  to  Stock
Appreciation  Rights, and in the number of shares subject to, and in the related
terms of,  other  outstanding  awards  (including  but not  limited to awards of
Restricted  Stock,  Deferred Stock,  Reload Stock Options and Other  Stock-Based
Awards)  granted under the Plan as may be determined  to be  appropriate  by the
Committee in order to prevent  dilution or enlargement of rights,  provided that
the number of shares subject to any award shall always be a whole number.


Section 4.        Eligibility.

                  Awards  may be made or  granted  to key  employees,  officers,
directors  and  consultants  who are  deemed to have  rendered  or to be able to
render  significant  services  to the  Company or its  Subsidiaries  and who are
deemed to have contributed or to have the potential to contribute to the success
of the Company.  No Incentive Stock Option shall be granted to any person who is
not an employee of the Company or a Subsidiary at the time of grant.


Section 5.        Required Six-Month Holding Period.

         A period of not less than six months must elapse from the date of grant
of an award  under  the  Plan,  (i)  before  any  disposition  by a Holder  of a
derivative  security (as defined in Rule 16a-1  promulgated under the Securities
Exchange  Act of 1934,  as  amended)  issued  under this Plan or (ii) before any
disposition by a Holder of any Stock  purchased or granted  pursuant to an award
under this Plan.


Section 6.        Stock Options.

         6.1 Grant and Exercise.  Stock Options granted under the Plan may be of
two types: (i) Incentive Stock Options and (ii) Nonqualified Stock Options.  Any
Stock Option granted under the Plan
                                        4
<PAGE>
shall contain such terms,  not  inconsistent  with this Plan, or with respect to
Incentive Stock Options,  not  inconsistent  with the Code, as the Committee may
from time to time  approve.  The  Committee  shall have the  authority  to grant
Incentive  Stock Options,  Non-Qualified  Stock Options,  or both types of Stock
Options and which may be granted  alone or in addition to other  awards  granted
under the Plan.  To the extent that any Stock  Option  intended to qualify as an
Incentive  Stock  Option does not so  qualify,  it shall  constitute  a separate
Nonqualified  Stock Option. An Incentive Stock Option may be granted only within
the ten-year period commencing from the Effective Date and may only be exercised
within ten years of the date of grant (or five years in the case of an Incentive
Stock  Option  granted to an optionee  ("10%  Stockholder")  who, at the time of
grant, owns Stock possessing more than 10% of the total combined voting power of
all classes of stock of the Company.

         6.2 Terms and Conditions. Stock Options granted under the Plan shall be
subject to the following terms and conditions:

                  (a)  Exercise  Price.  The  exercise  price per share of Stock
purchasable  under a Stock Option shall be  determined  by the  Committee at the
time of grant  and may not be less  than  100% of the Fair  Market  Value of the
Stock  as  defined  above;  provided,  however,  that the  exercise  price of an
Incentive Stock Option granted to a 10% Stockholder  shall not be less than 110%
of the Fair Market Value of the Stock.

                  (b) Option Term.  Subject to the  limitations  in Section 6.1,
above, the term of each Stock Option shall be fixed by the Committee.

                  (c) Exercisability. Stock Options shall be exercisable at such
time or times and subject to such terms and conditions as shall be determined by
the Committee and as set forth in Section 11, below. If the Committee  provides,
in its discretion,  that any Stock Option is exercisable  only in  installments,
i.e., that it vests over time, the Committee may waive such installment exercise
provisions at any time at or after the time of grant in whole or in part,  based
upon such factors as the Committee shall determine.

                  (d)  Method of  Exercise.  Subject  to  whatever  installment,
exercise and waiting  period  provisions  are  applicable in a particular  case,
Stock  Options may be  exercised in whole or in part at any time during the term
of the Option,  by giving written  notice of exercise to the Company  specifying
the number of shares of Stock to be purchased.  Such notice shall be accompanied
by payment in full of the  purchase  price,  which  shall be in cash or,  unless
otherwise  provided in the Agreement,  in shares of Stock (including  Restricted
Stock and other contingent awards under this Plan) or, partly in cash and partly
in such Stock, or such other means which the Committee determines are consistent
with the Plan's purpose and applicable  law. Cash payments shall be made by wire
transfer, certified or bank check or personal check, in each case payable to the
order of the Company; provided,  however, that the Company shall not be required
to deliver  certificates  for shares of Stock with respect to which an Option is
exercised  until the Company  has  confirmed  the receipt of good and  available
funds in payment of the purchase  price  thereof.  Payments in the form of Stock
shall be valued at the Fair  Market  Value of a share of Stock on the date prior
to the  date of  exercise.  Such  payments  shall be made by  delivery  of stock
certificates  in negotiable  form which are effective to transfer good and valid
title thereto to the Company, free of any liens or encumbrances.  Subject to the
terms of the  Agreement,  the  Committee  may,  in its sole  discretion,  at the
request of the Holder,  deliver upon the exercise of a Nonqualified Stock Option
a  combination  of shares of Deferred  Stock and Common  Stock;  provided  that,
notwithstanding  the  provisions of Section 9 of the Plan,  such Deferred  Stock
shall be fully vested and not subject to forfeiture. A Holder shall have none of
the rights of a  stockholder  with  respect to the shares  subject to the Option
until such shares  shall be  transferred  to the Holder upon the exercise of the
Option.
                                        5
<PAGE>
                  (e)  Transferability.  Except  as  may  be  set  forth  in the
Agreement,  no Stock  Option shall be  transferable  by the Holder other than by
will or by the laws of descent and distribution,  and all Stock Options shall be
exercisable, during the Holder's lifetime, only by the Holder.

                  (f) Termination by Reason of Death.  If a Holder's  employment
by the Company or a Subsidiary  terminates by reason of death,  any Stock Option
held by such Holder, unless otherwise determined by the Committee at the time of
grant and set forth in the  Agreement,  shall be fully vested and may thereafter
be exercised by the legal  representative of the estate or by the legatee of the
Holder  under the will of the  Holder,  for a period of one year (or such  other
greater or lesser period as the Committee may specify at grant) from the date of
such  death or until the  expiration  of the stated  term of such Stock  Option,
whichever period is the shorter.

                  (g)  Termination  by  Reason  of  Disability.  If  a  Holder's
employment by the Company or any Subsidiary  terminates by reason of Disability,
any  Stock  Option  held by such  Holder,  unless  otherwise  determined  by the
Committee  at the time of grant and set forth in the  Agreement,  shall be fully
vested and may  thereafter  be  exercised by the Holder for a period of one year
(or such other greater or lesser period as the Committee may specify at the time
of  grant)  from  the  date of such  termination  of  employment  or  until  the
expiration  of the stated  term of such Stock  Option,  whichever  period is the
shorter.

                  (h) Other  Termination.  Subject to the  provisions of Section
14.3,  below,  and unless  otherwise  determined by the Committee at the time of
grant and set forth in the Agreement,  if a Holder is an employee of the Company
or a  Subsidiary  at the time of grant and if such  Holder's  employment  by the
Company  or any  Subsidiary  terminates  for any  reason  other  than  death  or
Disability,  the Stock Option shall thereupon  automatically  terminate,  except
that if the Holder's  employment  is  terminated  by the Company or a Subsidiary
without cause or due to Normal Retirement, then the portion of such Stock Option
which has vested on the date of  termination  of employment may be exercised for
the lesser of three months after  termination  of  employment  or the balance of
such Stock Option's term.

                  (i) Additional Incentive Stock Option Limitation.  In the case
of an  Incentive  Stock  Option,  the  aggregate  Fair  Market  Value  of  Stock
(determined at the time of grant of the Option) with respect to which  Incentive
Stock Options become exercisable by a Holder during any calendar year (under all
such  plans of the  Company  and its  Parent  and  Subsidiary)  shall not exceed
$100,000.

                  (j) Buyout and Settlement Provisions. The Committee may at any
time,  in its  sole  discretion,  offer  to buy  out a Stock  Option  previously
granted,  based upon such terms and conditions as the Committee  shall establish
and communicate to the Holder at the time that such offer is made.

                  (k) Stock Option Agreement. Each grant of a Stock Option shall
be confirmed by, and shall be subject to the terms of, the Agreement executed by
the Company and the Holder.

         6.3 Stock Reload  Option.  The  Committee  may also grant to the Holder
(concurrently  with the grant of an  Incentive  Stock Option and at or after the
time of grant in the case of a Nonqualified  Stock Option) a Stock Reload Option
up to the  amount of shares of Stock  held by the Holder for at least six months
and used to pay all or part of the  exercise  price of an  Option  and,  if any,
withheld by the  Company as payment for  withholding  taxes.  Such Stock  Reload
Option  shall have an exercise  price  equal to the Fair Market  Value as of the
date  of  the  Stock  Reload  Option  grant.  Unless  the  Committee  determines
otherwise,  a Stock Reload Option may be exercised  commencing one year after it
is granted and shall expire on the date of expiration of the Option to which the
Reload Option is related.
                                        6
<PAGE>
Section 7.        Stock Appreciation Rights.

         7.1 Grant and  Exercise.  The  Committee  may grant Stock  Appreciation
Rights to  participants  who have been, or are being granted,  Options under the
Plan as a means of allowing such  participants to exercise their Options without
the need to pay the exercise price in cash. In the case of a Nonqualified  Stock
Option, a Stock Appreciation Right may be granted either at or after the time of
the grant of such  Nonqualified  Stock Option. In the case of an Incentive Stock
Option, a Stock  Appreciation Right may be granted only at the time of the grant
of such Incentive Stock Option.

         7.2 Terms and Conditions. Stock Appreciation Rights shall be subject to
the following terms and conditions:

                  (a)   Exercisability.   Stock  Appreciation  Rights  shall  be
exercisable  as  shall  be  determined  by the  Committee  and set  forth in the
Agreement, subject to the limitations, if any, imposed by the Code, with respect
to related Incentive Stock Options.

                  (b) Termination.  A Stock  Appreciation  Right shall terminate
and shall no longer be  exercisable  upon the  termination  or  exercise  of the
related Stock Option.

                  (c) Method of  Exercise.  Stock  Appreciation  Rights shall be
exercisable  upon  such  terms  and  conditions  as shall be  determined  by the
Committee  and set forth in the  Agreement and by  surrendering  the  applicable
portion of the related  Stock  Option.  Upon such  exercise and  surrender,  the
Holder  shall be entitled to receive a number of Option  Shares equal to the SAR
Value divided by the exercise price of the Option.

                  (d)  Shares  Affected  Upon  Plan.  The  granting  of a  Stock
Appreciation  Right  shall not affect  the  number of shares of Stock  available
under for awards under the Plan. The number of shares available for awards under
the Plan will,  however,  be reduced by the number of shares of Stock acquirable
upon  exercise  of the  Stock  Option to which  such  Stock  Appreciation  Right
relates.


Section 8.        Restricted Stock.

         8.1 Grant. Shares of Restricted Stock may be awarded either alone or in
addition to other awards granted under the Plan. The Committee  shall  determine
the  eligible  persons  to  whom,  and the time or times  at  which,  grants  of
Restricted Stock will be awarded,  the number of shares to be awarded, the price
(if any) to be paid by the Holder,  the time or times  within  which such awards
may be subject to forfeiture (the  "Restriction  Period"),  the vesting schedule
and rights to  acceleration  thereof,  and all other terms and conditions of the
awards.

         8.2 Terms and Conditions.  Each Restricted Stock award shall be subject
to the following terms and conditions:

                  (a)  Certificates.  Restricted  Stock,  when  issued,  will be
represented by a stock certificate or certificates registered in the name of the
Holder  to whom such  Restricted  Stock  shall  have been  awarded.  During  the
Restriction  Period,  certificates  representing  the  Restricted  Stock and any
securities  constituting Retained  Distributions (as defined below) shall bear a
legend to the effect that ownership of the  Restricted  Stock (and such Retained
Distributions), and the enjoyment of all rights appurtenant thereto, are subject
to the  restrictions,  terms  and  conditions  provided  in  the  Plan  and  the
Agreement.  Such certificates shall be deposited by the Holder with the Company,
together with stock powers or other instruments of assignment,  each endorsed in
blank,  which will  permit  transfer to the Company of all or any portion of the
Restricted Stock and any securities  constituting  Retained  Distributions  that
shall be forfeited or that shall not become vested in  accordance  with the Plan
and the Agreement.
                                        7
<PAGE>
                  (b) Rights of Holder. Restricted Stock shall constitute issued
and outstanding  shares of Common Stock for all corporate  purposes.  The Holder
will have the right to vote such  Restricted  Stock,  to receive  and retain all
regular cash dividends and other cash equivalent  distributions as the Board may
in its sole discretion designate, pay or distribute on such Restricted Stock and
to exercise all other rights,  powers and privileges of a holder of Common Stock
with respect to such Restricted  Stock,  with the exceptions that (i) the Holder
will not be  entitled  to  delivery  of the stock  certificate  or  certificates
representing  such  Restricted  Stock until the  Restriction  Period  shall have
expired and unless all other  vesting  requirements  with respect  thereto shall
have  been  fulfilled;  (ii)  the  Company  will  retain  custody  of the  stock
certificate  or  certificates  representing  the  Restricted  Stock  during  the
Restriction  Period;  (iii) other than  regular  cash  dividends  and other cash
equivalent  distributions as the Board may in its sole discretion designate, pay
or distribute,  the Company will retain custody of all distributions  ("Retained
Distributions")  made or declared with respect to the Restricted Stock (and such
Retained  Distributions  will be  subject  to the same  restrictions,  terms and
conditions as are applicable to the Restricted  Stock) until such time, if ever,
as the Restricted Stock with respect to which such Retained  Distributions shall
have been made,  paid or declared  shall have become  vested and with respect to
which the  Restriction  Period shall have  expired;  (iv) a breach of any of the
restrictions,  terms or  conditions  contained in this Plan or the  Agreement or
otherwise  established by the Committee with respect to any Restricted  Stock or
Retained  Distributions will cause a forfeiture of such Restricted Stock and any
Retained Distributions with respect thereto.

                  (c)  Vesting;   Forfeiture.   Upon  the   expiration   of  the
Restriction  Period  with  respect  to each  award of  Restricted  Stock and the
satisfaction of any other applicable restrictions,  terms and conditions (i) all
or part of such  Restricted  Stock shall become  vested in  accordance  with the
terms of the  Agreement,  subject to Section 11,  below,  and (ii) any  Retained
Distributions  with respect to such Restricted  Stock shall become vested to the
extent that the  Restricted  Stock  related  thereto  shall have become  vested,
subject  to  Section  11,  below.   Any  such  Restricted   Stock  and  Retained
Distributions  that do not vest shall be forfeited to the Company and the Holder
shall not thereafter have any rights with respect to such  Restricted  Stock and
Retained Distributions that shall have been so forfeited.


Section 9.        Deferred Stock.

         9.1 Grant.  Shares of Deferred  Stock may be awarded either alone or in
addition to other awards granted under the Plan. The Committee  shall  determine
the  eligible  persons to whom and the time or times at which grants of Deferred
Stock will be awarded,  the number of shares of Deferred  Stock to be awarded to
any person, the duration of the period (the "Deferral Period") during which, and
the conditions under which, receipt of the shares will be deferred,  and all the
other terms and conditions of the awards.

         9.2 Terms and Conditions. Each Deferred Stock award shall be subject to
the following terms and conditions:

                  (a) Certificates. At the expiration of the Deferral Period (or
the  Additional  Deferral  Period  referred to in Section  9.2 (d) below,  where
applicable),  share certificates shall be issued and delivered to the Holder, or
his legal representative, representing the number equal to the shares covered by
the Deferred Stock award.

                  (b) Rights of Holder.  A person  entitled to receive  Deferred
Stock shall not have any rights of a  stockholder  by virtue of such award until
the expiration of the applicable  Deferral  Period and the issuance and delivery
of the certificates  representing  such Stock. The shares of Stock issuable upon
expiration of the Deferral Period shall not be deemed outstanding by the Company
until the  expiration of such  Deferral  Period and the issuance and delivery of
such Stock to the Holder.

                  (c) Vesting;  Forfeiture.  Upon the expiration of the Deferral
Period with respect to each award of Deferred Stock and the  satisfaction of any
other applicable restrictions, terms and conditions all
                                        8
<PAGE>
or part of such Deferred Stock shall become vested in accordance  with the terms
of the  Agreement,  subject to Section 11, below.  Any such Deferred  Stock that
does not vest  shall be  forfeited  to the  Company  and the  Holder  shall  not
thereafter have any rights with respect to such Deferred Stock.

                  (d) Additional  Deferral  Period. A Holder may request to, and
the Committee may at any time,  defer the receipt of an award (or an installment
of an award) for an additional  specified period or until a specified event (the
"Additional  Deferral  Period").  Subject  to  any  exceptions  adopted  by  the
Committee,  such  request  must  generally  be made at least  one year  prior to
expiration  of the  Deferral  Period  for such  Deferred  Stock  award  (or such
installment).


Section 10.       Other Stock-Based Awards.

         10.1 Grant and  Exercise.  Other  Stock-Based  Awards  may be  awarded,
subject to limitations under applicable law, that are denominated or payable in,
valued in whole or in part by reference  to, or  otherwise  based on, or related
to, shares of Common Stock, as deemed by the Committee to be consistent with the
purposes of the Plan, including, without limitation,  purchase rights, shares of
Common Stock awarded which are not subject to any  restrictions  or  conditions,
convertible or exchangeable debentures,  or other rights convertible into shares
of Common Stock and awards  valued by reference to the value of securities of or
the  performance  of specified  Subsidiaries.  Other  Stock-Based  Awards may be
awarded  either alone or in addition to or in tandem with any other awards under
this Plan or any other plan of the Company.

         10.2  Eligibility  for Other  Stock-Based  Awards.  The Committee shall
determine the eligible  persons to whom and the time or times at which grants of
such  other  stock-based  awards  shall be made,  the number of shares of Common
Stock to be awarded pursuant to such awards,  and all other terms and conditions
of the awards.

         10.3  Terms and  Conditions.  Each  Other  Stock-Based  Award  shall be
subject to such terms and  conditions  as may be determined by the Committee and
to Section 11, below.


Section 11.       Accelerated Vesting and Exercisability.

         If (i) any person or entity other than the Company  and/or any officer,
director or principal stockholder (i.e., a holder (beneficially or of record) of
more than ten percent of the  Company's  voting  stock) of the Company as of the
Effective Date acquire  securities of the Company (in one or more  transactions)
having 25% or more of the total  voting  power of all the  Company's  securities
then  outstanding  and  (ii) the  Board of  Directors  of the  Company  does not
authorize or otherwise  approve such  acquisition,  then, the vesting periods of
any and all Options and other  awards  granted  and  outstanding  under the Plan
shall be  accelerated  and all such  Options  and awards  will  immediately  and
entirely vest, and the respective  holders thereof will have the immediate right
to purchase  and/or receive any and all Stock subject to such Options and awards
on the terms set forth in this  Plan and the  respective  agreements  respecting
such Options and awards.


Section 12.       Amendment and Termination.

         The Board may at any time, and from time to time, amend alter,  suspend
or discontinue any of the provisions of the Plan, but no amendment,  alteration,
suspension  or  discontinuance  shall be made which would impair the rights of a
Holder  under any  Agreement  theretofore  entered into  hereunder,  without the
Holder's consent.
                                        9
<PAGE>
Section 13.       Term of Plan.

         13.1  Effective  Date.  The Plan shall be  effective as of May 17, 1996
("Effective  Date"),  subject  to the  approval  of the  Plan  by the  Company's
stockholders  within one year after the Effective Date. Any awards granted under
the Plan prior to such approval shall be effective  when made (unless  otherwise
specified by the Committee at the time of grant), but shall be conditioned upon,
and subject to, such approval of the Plan by the Company's  stockholders  and no
awards  shall  vest or  otherwise  become  free of  restrictions  prior  to such
approval.

         13.2 Termination  Date. Unless terminated by the Board, this Plan shall
continue to remain  effective  until such time no further  awards may be granted
and all awards granted under the Plan are no longer outstanding. Notwithstanding
the foregoing, grants of Incentive Stock Options may only be made during the ten
year period following the Effective Date.


Section 14.       General Provisions.

         14.1 Written  Agreements.  Each award  granted  under the Plan shall be
confirmed by, and shall be subject to the terms of the Agreement executed by the
Company and the Holder.  The  Committee  may  terminate any award made under the
Plan if the  Agreement  relating  thereto is not  executed  and  returned to the
Company  within 10 days after the Agreement has been delivered to the Holder for
his or her execution.

         14.2  Unfunded  Status of Plan.  The Plan is intended to  constitute an
"unfunded"  plan for  incentive and deferred  compensation.  With respect to any
payments not yet made to a Holder by the Company, nothing contained herein shall
give any such  Holder  any  rights  that are  greater  than  those of a  general
creditor of the Company.

         14.3     Employees.

                  (a) Engaging in Competition  With the Company.  In the event a
Holder's  employment  with the Company or a  Subsidiary  is  terminated  for any
reason whatsoever, and within eighteen months after the date thereof such Holder
accepts  employment with any competitor of, or otherwise  engages in competition
with,  the Company,  the  Committee,  in its sole  discretion,  may require such
Holder  to return  to the  Company  the  economic  value of any award  which was
realized or obtained by such Holder at any time during the period  beginning  on
that date which is six months prior to the date of such Holder's  termination of
employment with the Company.

                  (b) Termination  for Cause.  The Committee may, in the event a
Holder's  employment  with the Company or a Subsidiary is terminated  for cause,
annul any award granted under this Plan to such employee and, in such event, the
Committee,  in its sole  discretion,  may  require  such Holder to return to the
Company the  economic  value of any award which was realized or obtained by such
Holder at any time during the period  beginning on that date which is six months
prior to the date of such Holder's termination of employment with the Company.

                  (c) No Right of Employment.  Nothing  contained in the Plan or
in any award  hereunder  shall be deemed to  confer  upon any  Holder  who is an
employee of the Company or any Subsidiary any right to continued employment with
the Company or any Subsidiary,  nor shall it interfere in any way with the right
of the Company or any  Subsidiary to terminate the  employment of any Holder who
is an employee at any time.

         14.4 Investment Representations.  The Committee may require each person
acquiring  shares of Stock  pursuant to a Stock  Option or other award under the
Plan to represent to and agree with the
                                       10
<PAGE>
Company  in  writing  that the Holder is  acquiring  the  shares for  investment
without a view to distribution thereof.

         14.5 Additional Incentive  Arrangements.  Nothing contained in the Plan
shall  prevent  the Board  from  adopting  such  other or  additional  incentive
arrangements  as it may deem  desirable,  including,  but not  limited  to,  the
granting of Stock  Options and the  awarding  of stock and cash  otherwise  than
under the Plan;  and such  arrangements  may be either  generally  applicable or
applicable only in specific cases.

         14.6  Withholding  Taxes. Not later than the date as of which an amount
must first be included in the gross income of the Holder for Federal  income tax
purposes  with  respect to any option or other award under the Plan,  the Holder
shall pay to the Company,  or make  arrangements  satisfactory  to the Committee
regarding  the  payment  of,  any  Federal,  state and  local  taxes of any kind
required by law to be withheld or paid with respect to such amount. If permitted
by the Committee,  tax  withholding or payment  obligations  may be settled with
Common Stock,  including  Common Stock that is part of the award that gives rise
to the  withholding  requirement.  The obligations of the Company under the Plan
shall be conditioned  upon such payment or  arrangements  and the Company or the
Holder's  employer (if not the Company) shall,  to the extent  permitted by law,
have the right to deduct any such taxes from any  payment of any kind  otherwise
due to the Holder from the Company or any Subsidiary.

         14.7  Governing  Law.  The Plan and all awards made and  actions  taken
thereunder shall be governed by and construed in accordance with the laws of the
State of New York (without regard to choice of law provisions).

         14.8 Other Benefit Plans. Any award granted under the Plan shall not be
deemed compensation for purposes of computing benefits under any retirement plan
of the Company or any  Subsidiary  and shall not affect any  benefits  under any
other benefit plan now or subsequently in effect under which the availability or
amount of benefits is related to the level of compensation  (unless  required by
specific reference in any such other plan to awards under this Plan).

         14.9 Non-Transferability. Except as otherwise expressly provided in the
Plan or the  Agreement,  no right or  benefit  under the Plan may be  alienated,
sold, assigned, hypothecated,  pledged, exchanged, transferred,  encumbranced or
charged,  and any  attempt  to  alienate,  sell,  assign,  hypothecate,  pledge,
exchange, transfer, encumber or charge the same shall be void.

         14.10  Applicable  Laws. The obligations of the Company with respect to
all  Stock  Options  and  awards  under  the Plan  shall be  subject  to (i) all
applicable  laws,  rules and regulations and such approvals by any  governmental
agencies as may be required,  including,  without limitation, the Securities Act
of 1933,  as  amended,  and (ii) the rules  and  regulations  of any  securities
exchange on which the Stock may be listed.

         14.11  Conflicts.  If any of the terms or  provisions of the Plan or an
Agreement  (with  respect  to  Incentive   Stock  Options)   conflict  with  the
requirements of Section 422 of the Code, then such terms or provisions  shall be
deemed  inoperative to the extent they so conflict with the requirements of said
Section 422 of the Code.  Additionally,  if this Plan or any Agreement  does not
contain any  provision  required to be included  herein under Section 422 of the
Code, such provision shall be deemed to be incorporated  herein and therein with
the same force and effect as if such provision had been set out at length herein
and therein.  If any of the terms or provisions  of any Agreement  conflict with
any terms or  provision  of the Plan,  then such  terms or  provisions  shall be
deemed  inoperative to the extent they so conflict with the  requirements of the
Plan. Additionally,  if any Agreement does not contain any provision required to
be  included  therein  under  the  Plan,  such  provision  shall be deemed to be
incorporated  therein  with the same force and effect as if such  provision  had
been set out at length therein.
                                       11
<PAGE>
         14.12 Non-Registered Stock. The shares of Stock to be distributed under
this  Plan  have not  been,  as of the  Effective  Date,  registered  under  the
Securities  Act  of  1933,  as  amended,  or any  applicable  state  or  foreign
securities  laws and the Company has no obligation to any Holder to register the
Stock or to assist  the  Holder  in  obtaining  an  exemption  from the  various
registration  requirements,  or to  list  the  Stock  on a  national  securities
exchange.
                                       12

                                September 1, 1995


Jerome H. Ludwig
8840 N. 57th Street
Paradise Valley, Arizona 85253

Dear Mr. Ludwig:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive a  non-incentive  stock  option  and that on August 18,  1995,  you were
granted an option to  purchase  One  Hundred  Thousand  (100,000)  shares of the
Company's  Common  Stock,  $.01 par  value,  at a price of $3.625 per share (the
"Stock").  The option  granted to you is subject to the terms and conditions set
forth in this letter (the "Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise your option,  only in accordance  with  Paragraph 3
below,  by delivery to the Company (in care of its  Secretary)  at the principal
offices of the Company,  presently  located at 3622 North 34th Avenue,  Phoenix,
Arizona 85017,  written  irrevocable  notice of exercise in the form attached to
this letter as Exhibit A.  specifying the number of shares with respect to which
the option is being  exercised,  together with payment of the exercise price for
those  shares in cash or by check.  Any other form of  exercise or tender may be
refused  by  the  Company,  acting  through  the  Board  or  otherwise,  in  its
discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your options shall vest on August 18, 1996.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(h)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on August 18, 1999.

                  (c) In the event you leave the  employment  of the Company for
         any  reason  whatsoever,   including   termination  by  your  voluntary
         resignation or at the direction of the Company,  with or without cause,
         or of your death or Permanent Disability,  then, at your option, or the
         option  of  your   personal   representative,   you  or  your  personal
         representative  may  exercise  the option to the extent  vested and not
         previously  exercised or expired,  such exercise to occur no later than
         sixty (60) days following your last day of employment  with the Company
         or the date of your death or Permanent Disability,  as applicable,  and
         the  Company  (or its  nominee)  shall  have  the  right  (but  not the
         obligation)  to  purchase  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  under  the Plan  held by you  (including  shares
         acquired  pursuant to this  sentence) at a price equal to the Appraised
         Value per share of such Stock,  determined in accordance with Paragraph
         3(e).  The  Company  (or its  nominee)  shall  exercise  this  right to
         repurchase  the  shares  of Stock,  if at all,  within  six (6)  months
         following  the  date of the  termination  of your  employment  with the
         Company  by  delivering  written  notice  of  exercise  to you or  your
         personal representative.  Payment on such exercise by the Company shall
         be made in not more than five equal  annual  installments  of principal
         and accrued  interest (at an annual interest rate,  adjusted on a daily
         basis,  equal to the prime rate of interest publicly  announced an such
         from time to time by Bank One in Phoenix, Arizona due commencing on the
         Company's  (or  its  nominee's)  purchase  and on  the  next  four  (4)
         anniversaries of such purchase. The date for consummating such purchase
         shall be the sixtieth  (60th) day  following  delivery of the Company's
         notice of exercise,  provided  that such date may be extended by you or
         your personal representative by written notice to a date not later than
         the earlier of ten (10)days after all holding periods under
<PAGE>
Jerome H. Ludwig
September 1, 1995
Page 2

         Section 422A of the Internal  Revenue Code expire or  consummation of a
         transaction (e.g., merger, consolidation, stock sale) pursuant to which
         the holder of your shares would be entitled to receive consideration of
         any kind.

                  (d) In the event  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  hereunder  or any  interest  therein,  are to be
         transferred,   voluntarily   or   involuntarily   (including,   without
         limitation,  any sale,  encumbrance,  foreclosure  or  transfer in lieu
         thereof,  or by operation  of law, any division of marital  property on
         account of divorce or legal  separation  being deemed a "transfer"  for
         purposes hereof, but excluding transfers to which Paragraph 3(c) hereof
         applies),  the  Company  (or its  nominee)  shall have a right of first
         refusal as follows: You (or the holder of such shares if not you) shall
         give the Company advance written notice  detailing all the terms of the
         proposed  transfer.  The Company (or its nominees) shall have the right
         (but not the obligation), exercisable upon delivery to the transferring
         shareholder  of written  notice of  acceptance  within thirty (30) days
         following receipt of the notice of proposed  transfer  described in the
         preceding  sentence,  to  repurchase  all or any of such  shares on the
         terms and  conditions  set-forth in such notice;  provided that the per
         share  purchase  price  shall be the lesser of (i) the price,  plus the
         Appraised Value of any non-cash consideration (determined in accordance
         with  the  procedures  specified  in  Paragraph  3(e)  below)  (or,  if
         applicable,  110% of the loan amount), stated in the notice or (ii) the
         Appraised Value of the shares,  determined in accordance with Paragraph
         3(e) (and shall be the Appraised  Value,  determined in accordance with
         Paragraph   3(e),  in  the  event  of  a  transfer  not  involving  any
         consideration);  and provided  further than the purchase price shall be
         payable,  at the election of the Company (or its  nominees),  either on
         the terms set forth in the  transferor's  notice or in up to five equal
         annual  installments  of principal  and accrued  interest (at an annual
         interest  rate,  adjusted on a daily basis,  equal to the prime rate of
         interest  publicly  announced  as such from time to time by Bank One in
         Phoenix,  Arizona) due  commencing on the Company's (or its  nominee's)
         purchase and on the next four (4)  anniversaries of such purchase.  The
         date for  consummating  such purchase shall be the sixtieth  (60th) day
         following  delivery  of the  Company's  (or its  nominees')  notice  of
         exercise,  provided that such date may be extended by the  transferring
         shareholder  by written  notice to a date not later than the earlier of
         ten (10) days after all holding  periods under Section 422A of the Code
         expire.  Failure by the Company (or its nominees)  (without  default by
         the  transferring  shareholder) to close such purchase within the above
         60 day period  shall  give the  transferring  shareholder  the right to
         transfer such shares or interest therein on the terms and to the person
         described in the notice during the 60 days following  expiration of the
         original 60-day period; provided that the shares or interest therein to
         be transferred shall for all purposes remain subject to this Agreement.
         If the transferring shareholder fails to close the proposed transfer on
         those terms within such second  60-day  period,  the proposed  transfer
         shall  again  be  subject  to  the  terms  of  this   Paragraph   3(d).
         Notwithstanding  the  foregoing,  such  shares  may be  transferred  or
         retransferred  without invoking this right of first refusal between you
         and trusts of which you and/or your  spouse are the sole  beneficiaries
         by giving  prior  written  notice  certifying  such a transfer is to be
         made;  provided  that  following any such  transfer,  such shares shall
         remain  subject  to this  right  of  first  refusal  and all the  other
         provisions of this agreement.

                  (e) The  "Appraised  Value" of a share of the Stock shall mean
         that value which is determined  pursuant to this  Paragraph  3(e).  The
         Appraised  Value  may  be  mutually  agreed  upon  by the  selling  and
         acquiring  parties  of the  shares  of  Stock.  If the  parties  cannot
         mutually  agree on the  Appraised  Value of a share of Stock within ten
         (10) days after  delivery of a written notice of exercise of a purchase
         right or obligation  hereunder,  then the Appraised Value of a share of
         Stock  shall  be  equal  to the  fair  market  value  of such  share as
         determined as of the date of  termination of your  employment  with the
         Company and in the  following  manner:  the fair market  value shall be
         determined  by a Board of  Arbitration  comprised of three (3) members,
         one of whom shall be selected by the selling  party and another of whom
         shall be selected by the  acquiring  party.  The third arbiter shall be
         appointed  by the two  arbiters  so  selected.  If either side fails to
         select an arbiter within fifteen (15) days after written  request to do
         so, then the other  party's  arbiter shall  unilaterally  establish the
         Appraised Value in a written  opinion.  The decision of the majority of
         said arbiters, or of the single arbiter if applicable, shall be binding
         upon the parties  hereto.  If no two arbiters  agree upon a single fair
         market value, it shall be the arithmetic average of the values
<PAGE>
Jerome H. Ludwig
September 1, 1995
Page 3

         determined  by the two arbiters  whose  estimates are closest in value,
         which  average  value  shall be binding  upon the parties  hereto.  The
         arbiters  shall  render  a  written  decision  and  shall  conduct  all
         proceedings  pursuant to the Uniform  Arbitration Act as adopted in the
         State  of  Arizona  and to the  then  existing  rules  of the  American
         Arbitration Association governing commercial transactions to the extent
         such rules are not inconsistent with such Act and this Agreement. Costs
         of  arbitration  shall be  borne  as  determined  by the  arbiters.  In
         determining  the Appraised  Value, no value shall be placed on the good
         will or name of the Company  (except that good will may be valued at an
         amount not exceeding its unamortized cost to the extent it represents a
         cost to the  Company,  and all shares  shall be valued  equally,  i.e.,
         without regard to majority or minority status of such shares.

                  (f)  "Permanent  Disability"  means  that you (1) are  under a
         legal  decree  of  incapacity  or  disability  pursuant  to title 14 of
         Arizona Revised Statutes or other applicable  statutes the date of such
         decree  being deemed to be the date on which such  disability  occurred
         for purposes of this agreement), or (2) submit any claim for disability
         insurance  benefits or for early  distribution  of the  amounts  from a
         qualified pension or profit-sharing  plan maintained by the Corporation
         on account of disability (the date of the earliest of such claims shall
         be the date on which such disability shall be deemed to have occurred),
         or (3) are  determined to be disabled  pursuant to a  Determination  of
         Disability.  A determination of Disability  means a determination  that
         you,  because of a medically  determinable  disease,  injury,  or other
         mental or physical disability,  are unable to perform substantially all
         of your  regular  duties  and that such  disability  is  determined  or
         reasonably  expected  to last at least  twelve  (12)  months,  based on
         then-available  medical  information.  The  Determination of Disability
         will  be  based  on the  written  opinion  of the  physician  regularly
         attending  you.  If the  Company  disagrees  with the  opinion  of such
         physician  (the First  Physician"),  it may  engage at its own  expense
         another  physician (the "Second  Physician") to examine you. The Second
         Physician  shall confer with the First  Physician and, if they together
         agree  in  writing  that  you are or are not  disabled,  their  written
         opinion  shall be conclusive  as to such  disability.  If the First and
         Second  Physicians do not agree,  they shall choose a third  consulting
         physician (the expense of which shall be borne by the Company), and the
         written  opinion of a majority of these three (3)  physicians  shall be
         conclusive as to such disability. The date of any written opinion which
         is conclusive to such disability is the date on which such  disability,
         if that is the  conclusion,  will be deemed to have occurred unless the
         opinion  expressly  establishes the date of occurrence.  In conjunction
         with this  Section,  you  consent to such  examination,  to furnish any
         medical information requested by any examining physician,  and to waive
         any  applicable  physician-patient  privilege that may arise because of
         such examination.  All physicians  except the First Physician  selected
         hereunder must be board-certified in the specialty most closely related
         to the nature of the disability alleged to exist.

                  (g) For so long as the Company's right to repurchase the Stock
         as set forth in this  Paragraph 3 remains  effective,  neither you, nor
         your personal representative(s),  devisee(s), heir(s), successor(s), or
         assignee(s)  shall sell,  assign or  otherwise  transfer  any shares of
         Stock or interest  therein without  obtaining the written  agreement of
         the purchaser, assignee or transferee that the shares remain subject to
         this repurchase  right, and you evidencing the Stock may be legended to
         reflect the foregoing restrictions.

                  (h) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of its common  stock to permit the  exercise of your option and all other
options granted or to be granted.

         5. It is contemplated that the common stock in the Company to be issued
to you upon exercise of your option will not be registered  under the Securities
Act of 1933, as amended (the "Act") or any applicable  state securities laws, in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance is otherwise in violation of  applicable  law at
the time  purchase  rights are exercised  under this option,  then the Company's
obligation  to issue  shares of its common  stock upon  exercise  of your option
shall  terminate.  If such an  exemption  is  available  in the  opinion of such
counsel,  and such issuance is not 
<PAGE>
Jerome H. Ludwig
September 1, 1995
Page 4

otherwise   in   violation   of   applicable   law   you   (or   your   personal
representative(s),  devisee(s),  or  heir(s))  will  deliver to the Company as a
condition  precedent to giving notice of each  exercise,  an  investment  letter
agreement  in form and  substance  satisfactory  to the  Company  to enable  the
Company to comply  with the Act or other  applicable  securities  laws and which
may,  among other  things,  limit or condition the right to dispose of shares of
Stock  acquired by exercise  of your  option  will be  permitted  only if in the
opinion  of counsel  satisfactory  to the  Company  Ouch  disposition  is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s),  or heirs(s))  deliver to the Company a letter agreement in form and
substance  satisfactory to the Company  whereby your  successor(s) or assign (6)
agrees to be bound by the terms and  conditions  of  paragraph  3 above and this
Paragraph 5. You (and your personal representative(s),  devisee(s), or heirs(s))
agree  to pay all  costs  of  obtaining  any  legal  opinions  and all  costs in
connection  with  proposed  exercise  of your option or  dispositions  of shares
acquired pursuant to your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition or other transfer by you of common stock issued to you upon exercise
of your options,  you agree to provide to the Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         8. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.

         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.


















         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 of this letter.  Any questions  concerning  any matter  relating to
your non-incentive stock option should also be addressed to the Secretary.

                                              Very truly yours,

                                              H.E.R.C. Products Incorporated
<PAGE>
Jerome H. Ludwig
September 1, 1995
Page 5





                                              By  /s/ Gary S. Glatter
                                                  ------------------------------

                                              Its      Chief Operating Officer
                                                  ------------------------------





ACCEPTED AND AGREED:




/s/ Jerome Ludwig
- ------------------------------------
Jerome Ludwig






















                                   EXHIBIT "A"

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
September  1, 1995 (the  "Agreement")  subject  to all the terms and  provisions
referred  to in  the  Agreement,  and  notify  you  of  my  desire  to  purchase
_______________  shares of Common Stock of H.E.R.C.  Products  Incorporated (the
<PAGE>
Jerome H. Ludwig
September 1, 1995
Page 6

"Company")  which were  offered to me  pursuant to said  Option.  Enclosed is my
check in the sum of $______________ in full payment for such shares.

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option  granted  to me  on  August  18,  1995  are  being  acquired  by me as an
investment  and  not  with a view  to,  or for  sale  in  connection  with,  the
distribution  of any such shares.  I also  represent  that I have read and fully
understand the Agreement,  including  without  limitation  the  restrictions  on
transfer of the shares hereby being acquired and the Company's repurchase rights
with  respect  to  such  shares.  I  agree  to  indemnify  the  Company  and its
subsidiaries, together with their respective officers and directors, against any
and all liabilities, losses, damages and expenses (including reasonable attorney
fees) arising from or in connection  with any  disposition  of the shares hereby
being acquired,  or any interest therein, in violation of applicable  securities
laws or  regulations.  I further  represent that I have been given access to all
information  necessary to allow me to make a decision as to the  advisability of
an  investment in the  Company's  stock and the value of such stock,  and that I
have the skill and experience necessary to make such decision.

         DATED:_____________________, 19 ___ .



                                               _________________________________
                                               Employee 's Signature



                                               _________________________________
                                               Signature of Employee's Spouse



Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to  above,   which  shares  were   transferred   to  me  on  H.E.R.C.   Products
Incorporated's stock record books on _______________, 19___.



                                               _________________________________
                                               Employee

                                  April 3, 1995


Jules Firetag
c/o Cruse, Firetag & Bock , P.C
5611 North 16th Street
Phoenix, Arizona   85016

Dear Mr. Firetag:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive  a  non-incentive  stock  option  and that on March 23,  1995,  you were
granted an option to  purchase  One  Hundred  Thousand  (100,000)  shares of the
Company's  Common  Stock,  $.01 par value (the  "Stock"),at a price of $2.50 per
share with respect to the first 50,000 shares of Stock,  and at a price of $4.00
per share with respect to the second 50,000 shares of Stock.  The option granted
to you is  subject to the terms and  conditions  set forth in this  letter  (the
"Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise  your option in whole or in part from time to time,
only in accordance  with Paragraph 3 below,  by delivery to the Company (in care
of its Secretary) at the principal offices of the Company,  presently located at
3622 North 34th Avenue,  Phoenix,  Arizona 85017,  written irrevocable notice of
exercise in the form attached to this letter as Exhibit A. specifying the number
of shares of Stock with respect to which the option is being exercised, together
with  payment  of the  exercise  price for  those  shares of Stock in cash or by
check.  Any other form of  exercise  or tender  may be  refused by the  Company,
acting through the Board or otherwise, in its discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your  options  shall  vest on  December  1, 1995  provided
         you are still a Director  of the  Company at such time,  unless you are
         not re-elected to the Board.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(c)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on December 1, 1999.

                  (c) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of Stock to permit the  exercise  of your  option  and all other  options
granted or to be granted.

         5. It is contemplated that the Stock in the Company to be issued to you
upon exercise of your option will not be registered  under the Securities Act of
1933,  as amended (the "Act") or any  applicable  state  securities  laws, or in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance is otherwise in violation of  applicable  law at
the time  purchase  rights are exercised  under this option,  then the Company's
obligation  to issue  shares of its Stock upon  exercise  of your  option  shall
terminate. If such an exemption is available in the opinion of such counsel, and
such  issuance is not  otherwise  in violation  of  applicable  law you (or your
personal representative(s),  devisee(s), or heir(s)) will deliver to the Company
as a condition precedent to giving notice of each exercise, an investment letter
agreement  in form and  substance  satisfactory  to the  Company  to enable  the
Company to comply  with the Act or other  applicable  securities  laws and which
may,  among other  things,  limit or condition the right to dispose of shares of
Stock  acquired by exercise of your option and will be permitted  only if in the
opinion of counsel  satisfactory  to the  Company,  such  disposition  is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s), or heirs(s)) deliver to the Company a letter agreement in form and
<PAGE>
Jules Firetag
April 3, 1995
Page 2

substance  satisfactory  to the Company  whereby  your  successor(s)  or assigns
agrees to be bound by the terms and  conditions  of this  Paragraph  5. You (and
your personal representative(s), devisee(s), or heirs(s)) agree to pay all costs
of  obtaining  any legal  opinions  and all costs in  connection  with  proposed
exercise of your option or dispositions of shares of Stock acquired  pursuant to
your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition  or other  transfer by you of Stock  issued to you upon  exercise of
your  options,  you agree to  provide to the  Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7.  In  the  event  of  any  merger,   reorganization,   consolidation,
recapitalization,  dividend (other than a cash dividend),  stock split,  reverse
stock split, or other change in corporate  structure  affecting the Stock,  such
substitution  or  adjustment  shall be made in the number and exercise  price of
shares  of  Stock  subject  to  this  Agreement,  as  may  be  determined  to be
appropriate  by the Board in order to prevent  dilution or  enlargement  of your
rights under this Agreement, provided that the number of shares of Stock subject
to your award shall always be a whole number.

         8. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         9. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.

         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.

         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 of this letter.  Any questions  concerning  any matter  relating to
your non-incentive stock option should also be addressed to the Secretary.

                                            Very truly yours,

                                            H.E.R.C. Products Incorporated





                                            By   /s/    Gary S. Glatter
                                                --------------------------------
                                            Its      President
                                                ----------------------------




ACCEPTED AND AGREED:


/s/  Jules Firetag
- -------------------------------
Jules Firetag
                                   EXHIBIT "A"
<PAGE>
Jules Firetag
April 3, 1995
Page 3

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
April 3, 1995 (the "Agreement") subject to all the terms and provisions referred
to in the  Agreement,  and notify you of my desire to  purchase  _______________
shares of Common Stock of H.E.R.C.  Products  Incorporated (the "Company") which
were offered to me pursuant to said  Option.  Enclosed is my check in the sum of
$______________ in full payment for such shares.

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option granted to me on March 23, 1995 are being acquired by me as an investment
and not with a view to, or for sale in connection  with, the distribution of any
such  shares.  I also  represent  that I have  read  and  fully  understand  the
Agreement,  including  without  limitation the  restrictions  on transfer of the
shares  hereby  being  acquired.  I  agree  to  indemnify  the  Company  and its
subsidiaries, together with their respective officers and directors, against any
and all liabilities, losses, damages and expenses (including reasonable attorney
fees) arising from or in connection  with any  disposition  of the shares hereby
being acquired,  or any interest therein, in violation of applicable  securities
laws or  regulations.  I further  represent that I have been given access to all
information  necessary to allow me to make a decision as to the  advisability of
an  investment in the  Company's  stock and the value of such stock,  and that I
have the skill and experience necessary to make such decision.

         DATED:_____________________________, 19 ___ .


       

                                            ____________________________________
                                            Jules Firetag





Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to above, which shares were transferred to me on H.E.R.C.  Products Incorporated
stock record books on _______________, 19___.



                                            ____________________________________
                                            Jules Firetag

                                December 1, 1995

Martin J. Plishka
9446 East Stagecoach Pass
Carefree, Arizona 85371

Dear Mr. Plishka:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive a  non-incentive  stock option and that on November  14, 1995,  you were
granted an option to purchase  Forty Thousand  (40,000)  shares of the Company's
Common Stock, $.01 par value, at a price of $1.9375 per share (the "Stock"). The
option  granted to you is subject to the terms and  conditions set forth in this
letter (the "Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise your option,  only in accordance  with  Paragraph 3
below,  by delivery to the Company (in care of its  Secretary)  at the principal
offices of the Company,  presently  located at 3622 North 34th Avenue,  Phoenix,
Arizona 85017,  written  irrevocable  notice of exercise in the form attached to
this letter as Exhibit A.  specifying the number of shares with respect to which
the option is being  exercised,  together with payment of the exercise price for
those  shares in cash or by check.  Any other form of  exercise or tender may be
refused  by  the  Company,  acting  through  the  Board  or  otherwise,  in  its
discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your  options  shall  vest on  December  1, 1996 as to the
         first  10,000  shares,  on  December  1, 1997 as to the  second  10,000
         shares,  on  December  1, 1998 as to the third  10,000  shares,  and on
         December 1, 1999 as to the last 10,000 shares.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(h)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on December 1, 2001.

                  (c) In the event you leave the  employment  of the Company for
         any  reason  whatsoever,   including   termination  by  your  voluntary
         resignation or at the direction of the Company,  with or without cause,
         or of your death or Permanent Disability,  then, at your option, or the
         option  of  your   personal   representative,   you  or  your  personal
         representative  may  exercise  the option to the extent  vested and not
         previously  exercised or expired,  such exercise to occur no later than
         sixty (60) days following your last day of employment  with the Company
         or the date of your death or Permanent Disability,  as applicable,  and
         the  Company  (or its  nominee)  shall  have  the  right  (but  not the
         obligation)  to  purchase  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  under  the Plan  held by you  (including  shares
         acquired  pursuant to this  sentence) at a price equal to the Appraised
         Value per share of such Stock,  determined in accordance with Paragraph
         3(e).  The  Company  (or its  nominee)  shall  exercise  this  right to
         repurchase  the  shares  of Stock,  if at all,  within  six (6)  months
         following  the  date of the  termination  of your  employment  with the
         Company  by  delivering  written  notice  of  exercise  to you or  your
         personal representative.  Payment on such exercise by the Company shall
         be made in not more than five equal  annual  installments  of principal
         and accrued  interest (at an annual interest rate,  adjusted on a daily
         basis,  equal to the prime rate of interest publicly  announced an such
         from time to time by Bank One in Phoenix, Arizona due commencing on the
         Company's  (or  its  nominee's)  purchase  and on  the  next  four  (4)
         anniversaries of such purchase. The date for consummating such purchase
         shall be the sixtieth  (60th) day  following  delivery of the Company's
         notice of 
<PAGE>
Martin J. Plishka
December 1, 1995
Page 2

         exercise,  provided  that  such  date  may be  extended  by you or your
         personal  representative by written notice to a date not later than the
         earlier of ten (10)days after all holding periods under Section 422A of
         the  Internal  Revenue  Code expire or  consummation  of a  transaction
         (e.g., merger, consolidation,  stock sale) pursuant to which the holder
         of your shares would be entitled to receive consideration of any kind.

                  (d) In the event  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  hereunder  or any  interest  therein,  are to be
         transferred,   voluntarily   or   involuntarily   (including,   without
         limitation,  any sale,  encumbrance,  foreclosure  or  transfer in lieu
         thereof,  or by operation  of law, any division of marital  property on
         account of divorce or legal  separation  being deemed a "transfer"  for
         purposes hereof, but excluding transfers to which Paragraph 3(c) hereof
         applies),  the  Company  (or its  nominee)  shall have a right of first
         refusal as follows: You (or the holder of such shares if not you) shall
         give the Company advance written notice  detailing all the terms of the
         proposed  transfer.  The Company (or its nominees) shall have the right
         (but not the obligation), exercisable upon delivery to the transferring
         shareholder  of written  notice of  acceptance  within thirty (30) days
         following receipt of the notice of proposed  transfer  described in the
         preceding  sentence,  to  repurchase  all or any of such  shares on the
         terms and  conditions  set-forth in such notice;  provided that the per
         share  purchase  price  shall be the lesser of (i) the price,  plus the
         Appraised Value of any non-cash consideration (determined in accordance
         with  the  procedures  specified  in  Paragraph  3(e)  below)  (or,  if
         applicable,  110% of the loan amount), stated in the notice or (ii) the
         Appraised Value of the shares,  determined in accordance with Paragraph
         3(e) (and shall be the Appraised  Value,  determined in accordance with
         Paragraph   3(e),  in  the  event  of  a  transfer  not  involving  any
         consideration);  and provided  further than the purchase price shall be
         payable,  at the election of the Company (or its  nominees),  either on
         the terms set forth in the  transferor's  notice or in up to five equal
         annual  installments  of principal  and accrued  interest (at an annual
         interest  rate,  adjusted on a daily basis,  equal to the prime rate of
         interest  publicly  announced  as such from time to time by Bank One in
         Phoenix,  Arizona) due  commencing on the Company's (or its  nominee's)
         purchase and on the next four (4)  anniversaries of such purchase.  The
         date for  consummating  such purchase shall be the sixtieth  (60th) day
         following  delivery  of the  Company's  (or its  nominees')  notice  of
         exercise,  provided that such date may be extended by the  transferring
         shareholder  by written  notice to a date not later than the earlier of
         ten (10) days after all holding  periods under Section 422A of the Code
         expire.  Failure by the Company (or its nominees)  (without  default by
         the  transferring  shareholder) to close such purchase within the above
         60 day period  shall  give the  transferring  shareholder  the right to
         transfer such shares or interest therein on the terms and to the person
         described in the notice during the 60 days following  expiration of the
         original 60-day period; provided that the shares or interest therein to
         be transferred shall for all purposes remain subject to this Agreement.
         If the transferring shareholder fails to close the proposed transfer on
         those terms within such second  60-day  period,  the proposed  transfer
         shall  again  be  subject  to  the  terms  of  this   Paragraph   3(d).
         Notwithstanding  the  foregoing,  such  shares  may be  transferred  or
         retransferred  without invoking this right of first refusal between you
         and trusts of which you and/or your  spouse are the sole  beneficiaries
         by giving  prior  written  notice  certifying  such a transfer is to be
         made;  provided  that  following any such  transfer,  such shares shall
         remain  subject  to this  right  of  first  refusal  and all the  other
         provisions of this agreement.

                  (e) The  "Appraised  Value" of a share of the Stock shall mean
         that value which is determined  pursuant to this  Paragraph  3(e).  The
         Appraised  Value  may  be  mutually  agreed  upon  by the  selling  and
         acquiring  parties  of the  shares  of  Stock.  If the  parties  cannot
         mutually  agree on the  Appraised  Value of a share of Stock within ten
         (10) days after  delivery of a written notice of exercise of a purchase
         right or obligation  hereunder,  then the Appraised Value of a share of
         Stock  shall  be  equal  to the  fair  market  value  of such  share as
         determined as of the date of  termination of your  employment  with the
         Company and in the  following  manner:  the fair market  value shall be
         determined  by a Board of  Arbitration  comprised of three (3) members,
         one of whom shall be selected by the selling  party and another of whom
         shall be selected by the  acquiring  party.  The third arbiter shall be
         appointed  by the two  arbiters  so  selected.  If either side fails to
         select an arbiter within fifteen (15) days after written  request to do
         so, then the other  party's  arbiter shall  unilaterally  establish the
         Appraised Value in a written  opinion.  The decision of the majority of
         said 
<PAGE>
Martin J. Plishka
December 1, 1995
Page 3

         arbiters, or of the single arbiter if applicable, shall be binding upon
         the parties hereto.  If no two arbiters agree upon a single fair market
         value, it shall be the arithmetic  average of the values  determined by
         the two arbiters  whose  estimates are closest in value,  which average
         value shall be binding  upon the parties  hereto.  The  arbiters  shall
         render a written decision and shall conduct all proceedings pursuant to
         the Uniform  Arbitration  Act as adopted in the State of Arizona and to
         the  then  existing  rules  of  the  American  Arbitration  Association
         governing  commercial  transactions  to the  extent  such rules are not
         inconsistent  with such Act and this  Agreement.  Costs of  arbitration
         shall  be borne as  determined  by the  arbiters.  In  determining  the
         Appraised  Value,  no value shall be placed on the good will or name of
         the  Company  (except  that good  will may be  valued at an amount  not
         exceeding  its  unamortized  cost to the extent it represents a cost to
         the Company,  and all shares  shall be valued  equally,  i.e.,  without
         regard to majority or minority status of such shares.

                  (f)  "Permanent  Disability"  means  that you (1) are  under a
         legal  decree  of  incapacity  or  disability  pursuant  to title 14 of
         Arizona Revised Statutes or other applicable  statutes the date of such
         decree  being deemed to be the date on which such  disability  occurred
         for purposes of this agreement), or (2) submit any claim for disability
         insurance  benefits or for early  distribution  of the  amounts  from a
         qualified pension or profit-sharing  plan maintained by the Corporation
         on account of disability (the date of the earliest of such claims shall
         be the date on which such disability shall be deemed to have occurred),
         or (3) are  determined to be disabled  pursuant to a  Determination  of
         Disability.  A determination of Disability  means a determination  that
         you,  because of a medically  determinable  disease,  injury,  or other
         mental or physical disability,  are unable to perform substantially all
         of your  regular  duties  and that such  disability  is  determined  or
         reasonably  expected  to last at least  twelve  (12)  months,  based on
         then-available  medical  information.  The  Determination of Disability
         will  be  based  on the  written  opinion  of the  physician  regularly
         attending  you.  If the  Company  disagrees  with the  opinion  of such
         physician  (the First  Physician"),  it may  engage at its own  expense
         another  physician (the "Second  Physician") to examine you. The Second
         Physician  shall confer with the First  Physician and, if they together
         agree  in  writing  that  you are or are not  disabled,  their  written
         opinion  shall be conclusive  as to such  disability.  If the First and
         Second  Physicians do not agree,  they shall choose a third  consulting
         physician (the expense of which shall be borne by the Company), and the
         written  opinion of a majority of these three (3)  physicians  shall be
         conclusive as to such disability. The date of any written opinion which
         is conclusive to such disability is the date on which such  disability,
         if that is the  conclusion,  will be deemed to have occurred unless the
         opinion  expressly  establishes the date of occurrence.  In conjunction
         with this  Section,  you  consent to such  examination,  to furnish any
         medical information requested by any examining physician,  and to waive
         any  applicable  physician-patient  privilege that may arise because of
         such examination.  All physicians  except the First Physician  selected
         hereunder must be board-certified in the specialty most closely related
         to the nature of the disability alleged to exist.

                  (g) For so long as the Company's right to repurchase the Stock
         as set forth in this  Paragraph 3 remains  effective,  neither you, nor
         your personal representative(s),  devisee(s), heir(s), successor(s), or
         assignee(s)  shall sell,  assign or  otherwise  transfer  any shares of
         Stock or interest  therein without  obtaining the written  agreement of
         the purchaser, assignee or transferee that the shares remain subject to
         this repurchase  right, and you evidencing the Stock may be legended to
         reflect the foregoing restrictions.

                  (h) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of its common  stock to permit the  exercise of your option and all other
options granted or to be granted.

         5. It is contemplated that the common stock in the Company to be issued
to you upon exercise of your option will not be registered  under the Securities
Act of 1933, as amended (the "Act") or any applicable  state securities laws, in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance is otherwise in violation of  applicable  law at
the time  purchase  rights are exercised  under this option,  then
<PAGE>
Martin J. Plishka
December 1, 1995
Page 4

the  Company's  obligation  to issue shares of its common stock upon exercise of
your option shall terminate. If such an exemption is available in the opinion of
such counsel,  and such issuance is not otherwise in violation of applicable law
you (or your personal representative(s), devisee(s), or heir(s)) will deliver to
the Company as a  condition  precedent  to giving  notice of each  exercise,  an
investment letter agreement in form and substance satisfactory to the Company to
enable the Company to comply with the Act or other  applicable  securities  laws
and which may,  among other  things,  limit or condition the right to dispose of
shares of Stock acquired by exercise of your option will be permitted only if in
the opinion of counsel  satisfactory  to the Company Ouch  disposition is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s),  or heirs(s))  deliver to the Company a letter agreement in form and
substance  satisfactory to the Company  whereby your  successor(s) or assign (6)
agrees to be bound by the terms and  conditions  of  paragraph  3 above and this
Paragraph 5. You (and your personal representative(s),  devisee(s), or heirs(s))
agree  to pay all  costs  of  obtaining  any  legal  opinions  and all  costs in
connection  with  proposed  exercise  of your option or  dispositions  of shares
acquired pursuant to your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition or other transfer by you of common stock issued to you upon exercise
of your options,  you agree to provide to the Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         8. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.




















         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.

         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 of this letter.  Any questions  concerning  any matter  relating to
your non-incentive stock option should also be addressed to the Secretary.
<PAGE>
Martin J. Plishka
December 1, 1995
Page 5

                                            Very truly yours,

                                            H.E.R.C. Products Incorporated




                                            By   /s/  Gary S. Glatter
                                                --------------------------------
                                            Its      Chief Operating Officer
                                                --------------------------------



ACCEPTED AND AGREED:



/s/  Martin J. Plishka
- ----------------------------
Martin J. Plishka


























                                   EXHIBIT "A"

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
December  1,  1995 (the  "Agreement")  subject  to all the terms and  provisions
referred  to in  the  Agreement,  and  notify  you  of  my  desire  to  purchase
_______________  shares of Common Stock of H.E.R.C.  Products  Incorporated (the
<PAGE>
Martin J. Plishka
December 1, 1995
Page 6

"Company")  which were  offered to me  pursuant to said  Option.  Enclosed is my
check in the sum of $______________ in full payment for such shares.

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option  granted  to me on  November  14,  1995 are  being  acquired  by me as an
investment  and  not  with a view  to,  or for  sale  in  connection  with,  the
distribution  of any such shares.  I also  represent  that I have read and fully
understand the Agreement,  including  without  limitation  the  restrictions  on
transfer of the shares hereby being acquired and the Company's repurchase rights
with  respect  to  such  shares.  I  agree  to  indemnify  the  Company  and its
subsidiaries, together with their respective officers and directors, against any
and all liabilities, losses, damages and expenses (including reasonable attorney
fees) arising from or in connection  with any  disposition  of the shares hereby
being acquired,  or any interest therein, in violation of applicable  securities
laws or  regulations.  I further  represent that I have been given access to all
information  necessary to allow me to make a decision as to the  advisability of
an  investment in the  Company's  stock and the value of such stock,  and that I
have the skill and experience necessary to make such decision.

         DATED:  ___________________________, 19 ___ .



                                               _________________________________
                                               Employee 's Signature



                                               _________________________________
                                               Signature of Employee's Spouse



Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to  above,   which  shares  were   transferred   to  me  on  H.E.R.C.   Products
Incorporated's stock record books on _______________, 19___.



                                               _________________________________
                                               Employee

                                December 1, 1995

Myron Shenkiryk
16028 S. 12th Place
Phoenix, Arizona 85048

Dear Mr. Shenkiryk:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive a  non-incentive  stock option and that on November  14, 1995,  you were
granted an option to purchase  Forty Thousand  (40,000)  shares of the Company's
Common Stock, $.01 par value, at a price of $1.9375 per share (the "Stock"). The
option  granted to you is subject to the terms and  conditions set forth in this
letter (the "Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise your option,  only in accordance  with  Paragraph 3
below,  by delivery to the Company (in care of its  Secretary)  at the principal
offices of the Company,  presently  located at 3622 North 34th Avenue,  Phoenix,
Arizona 85017,  written  irrevocable  notice of exercise in the form attached to
this letter as Exhibit A.  specifying the number of shares with respect to which
the option is being  exercised,  together with payment of the exercise price for
those  shares in cash or by check.  Any other form of  exercise or tender may be
refused  by  the  Company,  acting  through  the  Board  or  otherwise,  in  its
discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your  options  shall  vest on  December  1, 1996 as to the
         first  10,000  shares,  on  December  1, 1997 as to the  second  10,000
         shares,  on  December  1, 1998 as to the third  10,000  shares,  and on
         December 1, 1999 as to the last 10,000 shares.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(h)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on December 1, 2001.

                  (c) In the event you leave the  employment  of the Company for
         any  reason  whatsoever,   including   termination  by  your  voluntary
         resignation or at the direction of the Company,  with or without cause,
         or of your death or Permanent Disability,  then, at your option, or the
         option  of  your   personal   representative,   you  or  your  personal
         representative  may  exercise  the option to the extent  vested and not
         previously  exercised or expired,  such exercise to occur no later than
         sixty (60) days following your last day of employment  with the Company
         or the date of your death or Permanent Disability,  as applicable,  and
         the  Company  (or its  nominee)  shall  have  the  right  (but  not the
         obligation)  to  purchase  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  under  the Plan  held by you  (including  shares
         acquired  pursuant to this  sentence) at a price equal to the Appraised
         Value per share of such Stock,  determined in accordance with Paragraph
         3(e).  The  Company  (or its  nominee)  shall  exercise  this  right to
         repurchase  the  shares  of Stock,  if at all,  within  six (6)  months
         following  the  date of the  termination  of your  employment  with the
         Company  by  delivering  written  notice  of  exercise  to you or  your
         personal representative.  Payment on such exercise by the Company shall
         be made in not more than five equal  annual  installments  of principal
         and accrued  interest (at an annual interest rate,  adjusted on a daily
         basis,  equal to the prime rate of interest publicly  announced an such
         from time to time by Bank One in Phoenix, Arizona due commencing on the
         Company's  (or  its  nominee's)  purchase  and on  the  next  four  (4)
         anniversaries of such purchase. The date for consummating such purchase
         shall be the sixtieth  (60th) day  following  delivery of the Company's
         notice of exercise,  provided  that such date may be extended by you or
         your personal representative by 
<PAGE>
Myron Shenkiryk
December 1, 1995
Page 2

         written  notice to a date not later than the  earlier  of ten  (10)days
         after all holding  periods under  Section 422A of the Internal  Revenue
         Code  expire  or   consummation   of  a  transaction   (e.g.,   merger,
         consolidation,  stock sale) pursuant to which the holder of your shares
         would be entitled to receive consideration of any kind.

                  (d) In the event  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  hereunder  or any  interest  therein,  are to be
         transferred,   voluntarily   or   involuntarily   (including,   without
         limitation,  any sale,  encumbrance,  foreclosure  or  transfer in lieu
         thereof,  or by operation  of law, any division of marital  property on
         account of divorce or legal  separation  being deemed a "transfer"  for
         purposes hereof, but excluding transfers to which Paragraph 3(c) hereof
         applies),  the  Company  (or its  nominee)  shall have a right of first
         refusal as follows: You (or the holder of such shares if not you) shall
         give the Company advance written notice  detailing all the terms of the
         proposed  transfer.  The Company (or its nominees) shall have the right
         (but not the obligation), exercisable upon delivery to the transferring
         shareholder  of written  notice of  acceptance  within thirty (30) days
         following receipt of the notice of proposed  transfer  described in the
         preceding  sentence,  to  repurchase  all or any of such  shares on the
         terms and  conditions  set-forth in such notice;  provided that the per
         share  purchase  price  shall be the lesser of (i) the price,  plus the
         Appraised Value of any non-cash consideration (determined in accordance
         with  the  procedures  specified  in  Paragraph  3(e)  below)  (or,  if
         applicable,  110% of the loan amount), stated in the notice or (ii) the
         Appraised Value of the shares,  determined in accordance with Paragraph
         3(e) (and shall be the Appraised  Value,  determined in accordance with
         Paragraph   3(e),  in  the  event  of  a  transfer  not  involving  any
         consideration);  and provided  further than the purchase price shall be
         payable,  at the election of the Company (or its  nominees),  either on
         the terms set forth in the  transferor's  notice or in up to five equal
         annual  installments  of principal  and accrued  interest (at an annual
         interest  rate,  adjusted on a daily basis,  equal to the prime rate of
         interest  publicly  announced  as such from time to time by Bank One in
         Phoenix,  Arizona) due  commencing on the Company's (or its  nominee's)
         purchase and on the next four (4)  anniversaries of such purchase.  The
         date for  consummating  such purchase shall be the sixtieth  (60th) day
         following  delivery  of the  Company's  (or its  nominees')  notice  of
         exercise,  provided that such date may be extended by the  transferring
         shareholder  by written  notice to a date not later than the earlier of
         ten (10) days after all holding  periods under Section 422A of the Code
         expire.  Failure by the Company (or its nominees)  (without  default by
         the  transferring  shareholder) to close such purchase within the above
         60 day period  shall  give the  transferring  shareholder  the right to
         transfer such shares or interest therein on the terms and to the person
         described in the notice during the 60 days following  expiration of the
         original 60-day period; provided that the shares or interest therein to
         be transferred shall for all purposes remain subject to this Agreement.
         If the transferring shareholder fails to close the proposed transfer on
         those terms within such second  60-day  period,  the proposed  transfer
         shall  again  be  subject  to  the  terms  of  this   Paragraph   3(d).
         Notwithstanding  the  foregoing,  such  shares  may be  transferred  or
         retransferred  without invoking this right of first refusal between you
         and trusts of which you and/or your  spouse are the sole  beneficiaries
         by giving  prior  written  notice  certifying  such a transfer is to be
         made;  provided  that  following any such  transfer,  such shares shall
         remain  subject  to this  right  of  first  refusal  and all the  other
         provisions of this agreement.

                  (e) The  "Appraised  Value" of a share of the Stock shall mean
         that value which is determined  pursuant to this  Paragraph  3(e).  The
         Appraised  Value  may  be  mutually  agreed  upon  by the  selling  and
         acquiring  parties  of the  shares  of  Stock.  If the  parties  cannot
         mutually  agree on the  Appraised  Value of a share of Stock within ten
         (10) days after  delivery of a written notice of exercise of a purchase
         right or obligation  hereunder,  then the Appraised Value of a share of
         Stock  shall  be  equal  to the  fair  market  value  of such  share as
         determined as of the date of  termination of your  employment  with the
         Company and in the  following  manner:  the fair market  value shall be
         determined  by a Board of  Arbitration  comprised of three (3) members,
         one of whom shall be selected by the selling  party and another of whom
         shall be selected by the  acquiring  party.  The third arbiter shall be
         appointed  by the two  arbiters  so  selected.  If either side fails to
         select an arbiter within fifteen (15) days after written  request to do
         so, then the other  party's  arbiter shall  unilaterally  establish the
         Appraised Value in a written  opinion.  The decision of the majority of
         said arbiters, or of the single arbiter if applicable, shall be binding
         upon the parties  hereto.  If no two 
<PAGE>
Myron Shenkiryk
December 1, 1995
Page 3

         arbiters  agree  upon a  single  fair  market  value,  it  shall be the
         arithmetic  average of the values  determined by the two arbiters whose
         estimates  are closest in value,  which  average value shall be binding
         upon the parties hereto.  The arbiters shall render a written  decision
         and shall conduct all proceedings  pursuant to the Uniform  Arbitration
         Act as adopted in the State of Arizona and to the then  existing  rules
         of  the   American   Arbitration   Association   governing   commercial
         transactions  to the extent such rules are not  inconsistent  with such
         Act and  this  Agreement.  Costs  of  arbitration  shall  be  borne  as
         determined by the arbiters.  In  determining  the Appraised  Value,  no
         value shall be placed on the good will or name of the  Company  (except
         that good will may be valued at an amount not exceeding its unamortized
         cost to the extent it represents a cost to the Company,  and all shares
         shall be valued equally,  i.e.,  without regard to majority or minority
         status of such shares.

                  (f)  "Permanent  Disability"  means  that you (1) are  under a
         legal  decree  of  incapacity  or  disability  pursuant  to title 14 of
         Arizona Revised Statutes or other applicable  statutes the date of such
         decree  being deemed to be the date on which such  disability  occurred
         for purposes of this agreement), or (2) submit any claim for disability
         insurance  benefits or for early  distribution  of the  amounts  from a
         qualified pension or profit-sharing  plan maintained by the Corporation
         on account of disability (the date of the earliest of such claims shall
         be the date on which such disability shall be deemed to have occurred),
         or (3) are  determined to be disabled  pursuant to a  Determination  of
         Disability.  A determination of Disability  means a determination  that
         you,  because of a medically  determinable  disease,  injury,  or other
         mental or physical disability,  are unable to perform substantially all
         of your  regular  duties  and that such  disability  is  determined  or
         reasonably  expected  to last at least  twelve  (12)  months,  based on
         then-available  medical  information.  The  Determination of Disability
         will  be  based  on the  written  opinion  of the  physician  regularly
         attending  you.  If the  Company  disagrees  with the  opinion  of such
         physician  (the First  Physician"),  it may  engage at its own  expense
         another  physician (the "Second  Physician") to examine you. The Second
         Physician  shall confer with the First  Physician and, if they together
         agree  in  writing  that  you are or are not  disabled,  their  written
         opinion  shall be conclusive  as to such  disability.  If the First and
         Second  Physicians do not agree,  they shall choose a third  consulting
         physician (the expense of which shall be borne by the Company), and the
         written  opinion of a majority of these three (3)  physicians  shall be
         conclusive as to such disability. The date of any written opinion which
         is conclusive to such disability is the date on which such  disability,
         if that is the  conclusion,  will be deemed to have occurred unless the
         opinion  expressly  establishes the date of occurrence.  In conjunction
         with this  Section,  you  consent to such  examination,  to furnish any
         medical information requested by any examining physician,  and to waive
         any  applicable  physician-patient  privilege that may arise because of
         such examination.  All physicians  except the First Physician  selected
         hereunder must be board-certified in the specialty most closely related
         to the nature of the disability alleged to exist.

                  (g) For so long as the Company's right to repurchase the Stock
         as set forth in this  Paragraph 3 remains  effective,  neither you, nor
         your personal representative(s),  devisee(s), heir(s), successor(s), or
         assignee(s)  shall sell,  assign or  otherwise  transfer  any shares of
         Stock or interest  therein without  obtaining the written  agreement of
         the purchaser, assignee or transferee that the shares remain subject to
         this repurchase  right, and you evidencing the Stock may be legended to
         reflect the foregoing restrictions.

                  (h) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of its common  stock to permit the  exercise of your option and all other
options granted or to be granted.

         5. It is contemplated that the common stock in the Company to be issued
to you upon exercise of your option will not be registered  under the Securities
Act of 1933, as amended (the "Act") or any applicable  state securities laws, in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance is otherwise in violation of  applicable  law at
the time  purchase  rights are exercised  under this option,  then the Company's
obligation  to issue  shares of its common  stock upon  exercise  of your option
shall  
<PAGE>
Myron Shenkiryk
December 1, 1995
Page 4

terminate. If such an exemption is available in the opinion of such counsel, and
such  issuance is not  otherwise  in violation  of  applicable  law you (or your
personal representative(s),  devisee(s), or heir(s)) will deliver to the Company
as a condition precedent to giving notice of each exercise, an investment letter
agreement  in form and  substance  satisfactory  to the  Company  to enable  the
Company to comply  with the Act or other  applicable  securities  laws and which
may,  among other  things,  limit or condition the right to dispose of shares of
Stock  acquired by exercise  of your  option  will be  permitted  only if in the
opinion  of counsel  satisfactory  to the  Company  Ouch  disposition  is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s),  or heirs(s))  deliver to the Company a letter agreement in form and
substance  satisfactory to the Company  whereby your  successor(s) or assign (6)
agrees to be bound by the terms and  conditions  of  paragraph  3 above and this
Paragraph 5. You (and your personal representative(s),  devisee(s), or heirs(s))
agree  to pay all  costs  of  obtaining  any  legal  opinions  and all  costs in
connection  with  proposed  exercise  of your option or  dispositions  of shares
acquired pursuant to your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition or other transfer by you of common stock issued to you upon exercise
of your options,  you agree to provide to the Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         8. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.




















         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.

         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 of this letter.  Any questions  concerning  any matter  relating to
your non-incentive stock option should also be addressed to the Secretary.
<PAGE>
Myron Shenkiryk
December 1, 1995
Page 5


                                         Very truly yours,

                                         H.E.R.C. Products Incorporated




                                         By   /s/  Gary S. Glatter
                                             -----------------------------------
                                         Its      Chief Operating Officer
                                             -----------------------------------



ACCEPTED AND AGREED:



/s/  Myron Shenkiryk
- --------------------------
Myron Shenkiryk


























                                   EXHIBIT "A"

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
December  1,  1995 (the  "Agreement")  subject  to all the terms and  provisions
referred  to in  the  Agreement,  and  notify  you  of  my  desire  to  purchase
_______________  shares of Common Stock of H.E.R.C.  Products  Incorporated (the
"Company")  which were  offered to me  pursuant to said  Option.  Enclosed is my
check in the sum of $______________ in full payment for such shares.
<PAGE>
Myron Shenkiryk
December 1, 1995
Page 6

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option  granted  to me on  November  14,  1995 are  being  acquired  by me as an
investment  and  not  with a view  to,  or for  sale  in  connection  with,  the
distribution  of any such shares.  I also  represent  that I have read and fully
understand the Agreement,  including  without  limitation  the  restrictions  on
transfer of the shares hereby being acquired and the Company's repurchase rights
with  respect  to  such  shares.  I  agree  to  indemnify  the  Company  and its
subsidiaries, together with their respective officers and directors, against any
and all liabilities, losses, damages and expenses (including reasonable attorney
fees) arising from or in connection  with any  disposition  of the shares hereby
being acquired,  or any interest therein, in violation of applicable  securities
laws or  regulations.  I further  represent that I have been given access to all
information  necessary to allow me to make a decision as to the  advisability of
an  investment in the  Company's  stock and the value of such stock,  and that I
have the skill and experience necessary to make such decision.

         DATED: ____________________________, 19 ___ .




                                                 _______________________________
                                                 Employee 's Signature



                                                 _______________________________
                                                 Signature of Employee's Spouse



Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to  above,   which  shares  were   transferred   to  me  on  H.E.R.C.   Products
Incorporated's stock record books on _______________, 19___.



                                                 _______________________________
                                                 Employee

                                December 1, 1995

Kenneth Bright
16040 Penwood Drive
Tampa, Florida 33647

Dear Mr. Bright:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive a  non-incentive  stock option and that on November  15, 1996,  you were
granted an option to purchase  Fifty Thousand  (50,000)  shares of the Company's
Common Stock, $.01 par value, at a price of $2.0625 per share (the "Stock"). The
option  granted to you is subject to the terms and  conditions set forth in this
letter (the "Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise your option,  only in accordance  with  Paragraph 3
below,  by delivery to the Company (in care of its  Secretary)  at the principal
offices of the Company,  presently  located at 3622 North 34th Avenue,  Phoenix,
Arizona 85017,  written  irrevocable  notice of exercise in the form attached to
this letter as Exhibit A.  specifying the number of shares with respect to which
the option is being  exercised,  together with payment of the exercise price for
those  shares in cash or by check.  Any other form of  exercise or tender may be
refused  by  the  Company,  acting  through  the  Board  or  otherwise,  in  its
discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your  options  shall  vest on  December  1, 1996 as to the
         first  10,000  shares,  on  December  1, 1997 as to the  second  10,000
         shares,  on December 1, 1998 as to the third 10,000 shares, on December
         1, 1999 as to the fourth 10,000  shares,  and on December 1, 2000 as to
         the last 10,000 shares.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(h)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on December 1, 2001.

                  (c) In the event you leave the  employment  of the Company for
         any  reason  whatsoever,   including   termination  by  your  voluntary
         resignation or at the direction of the Company,  with or without cause,
         or of your death or Permanent Disability,  then, at your option, or the
         option  of  your   personal   representative,   you  or  your  personal
         representative  may  exercise  the option to the extent  vested and not
         previously  exercised or expired,  such exercise to occur no later than
         sixty (60) days following your last day of employment  with the Company
         or the date of your death or Permanent Disability,  as applicable,  and
         the  Company  (or its  nominee)  shall  have  the  right  (but  not the
         obligation)  to  purchase  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  under  the Plan  held by you  (including  shares
         acquired  pursuant to this  sentence) at a price equal to the Appraised
         Value per share of such Stock,  determined in accordance with Paragraph
         3(e).  The  Company  (or its  nominee)  shall  exercise  this  right to
         repurchase  the  shares  of Stock,  if at all,  within  six (6)  months
         following  the  date of the  termination  of your  employment  with the
         Company  by  delivering  written  notice  of  exercise  to you or  your
         personal representative.  Payment on such exercise by the Company shall
         be made in not more than five equal  annual  installments  of principal
         and accrued  interest (at an annual interest rate,  adjusted on a daily
         basis,  equal to the prime rate of interest publicly  announced an such
         from time to time by Bank One in Phoenix, Arizona due commencing on the
         Company's  (or  its  nominee's)  purchase  and on  the  next  four  (4)
         anniversaries of such purchase. The date for consummating such purchase
         shall be the sixtieth  (60th) day  following  delivery of the Company's
         notice of 
<PAGE>
Kenneth Bright
December 1, 1995
Page 2

         exercise,  provided  that  such  date  may be  extended  by you or your
         personal  representative by written notice to a date not later than the
         earlier of ten (10)days after all holding periods under Section 422A of
         the  Internal  Revenue  Code expire or  consummation  of a  transaction
         (e.g., merger, consolidation,  stock sale) pursuant to which the holder
         of your shares would be entitled to receive consideration of any kind.

                  (d) In the event  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  hereunder  or any  interest  therein,  are to be
         transferred,   voluntarily   or   involuntarily   (including,   without
         limitation,  any sale,  encumbrance,  foreclosure  or  transfer in lieu
         thereof,  or by operation  of law, any division of marital  property on
         account of divorce or legal  separation  being deemed a "transfer"  for
         purposes hereof, but excluding transfers to which Paragraph 3(c) hereof
         applies),  the  Company  (or its  nominee)  shall have a right of first
         refusal as follows: You (or the holder of such shares if not you) shall
         give the Company advance written notice  detailing all the terms of the
         proposed  transfer.  The Company (or its nominees) shall have the right
         (but not the obligation), exercisable upon delivery to the transferring
         shareholder  of written  notice of  acceptance  within thirty (30) days
         following receipt of the notice of proposed  transfer  described in the
         preceding  sentence,  to  repurchase  all or any of such  shares on the
         terms and  conditions  set-forth in such notice;  provided that the per
         share  purchase  price  shall be the lesser of (i) the price,  plus the
         Appraised Value of any non-cash consideration (determined in accordance
         with  the  procedures  specified  in  Paragraph  3(e)  below)  (or,  if
         applicable,  110% of the loan amount), stated in the notice or (ii) the
         Appraised Value of the shares,  determined in accordance with Paragraph
         3(e) (and shall be the Appraised  Value,  determined in accordance with
         Paragraph   3(e),  in  the  event  of  a  transfer  not  involving  any
         consideration);  and provided  further than the purchase price shall be
         payable,  at the election of the Company (or its  nominees),  either on
         the terms set forth in the  transferor's  notice or in up to five equal
         annual  installments  of principal  and accrued  interest (at an annual
         interest  rate,  adjusted on a daily basis,  equal to the prime rate of
         interest  publicly  announced  as such from time to time by Bank One in
         Phoenix,  Arizona) due  commencing on the Company's (or its  nominee's)
         purchase and on the next four (4)  anniversaries of such purchase.  The
         date for  consummating  such purchase shall be the sixtieth  (60th) day
         following  delivery  of the  Company's  (or its  nominees')  notice  of
         exercise,  provided that such date may be extended by the  transferring
         shareholder  by written  notice to a date not later than the earlier of
         ten (10) days after all holding  periods under Section 422A of the Code
         expire.  Failure by the Company (or its nominees)  (without  default by
         the  transferring  shareholder) to close such purchase within the above
         60 day period  shall  give the  transferring  shareholder  the right to
         transfer such shares or interest therein on the terms and to the person
         described in the notice during the 60 days following  expiration of the
         original 60-day period; provided that the shares or interest therein to
         be transferred shall for all purposes remain subject to this Agreement.
         If the transferring shareholder fails to close the proposed transfer on
         those terms within such second  60-day  period,  the proposed  transfer
         shall  again  be  subject  to  the  terms  of  this   Paragraph   3(d).
         Notwithstanding  the  foregoing,  such  shares  may be  transferred  or
         retransferred  without invoking this right of first refusal between you
         and trusts of which you and/or your  spouse are the sole  beneficiaries
         by giving  prior  written  notice  certifying  such a transfer is to be
         made;  provided  that  following any such  transfer,  such shares shall
         remain  subject  to this  right  of  first  refusal  and all the  other
         provisions of this agreement.

                  (e) The  "Appraised  Value" of a share of the Stock shall mean
         that value which is determined  pursuant to this  Paragraph  3(e).  The
         Appraised  Value  may  be  mutually  agreed  upon  by the  selling  and
         acquiring  parties  of the  shares  of  Stock.  If the  parties  cannot
         mutually  agree on the  Appraised  Value of a share of Stock within ten
         (10) days after  delivery of a written notice of exercise of a purchase
         right or obligation  hereunder,  then the Appraised Value of a share of
         Stock  shall  be  equal  to the  fair  market  value  of such  share as
         determined as of the date of  termination of your  employment  with the
         Company and in the  following  manner:  the fair market  value shall be
         determined  by a Board of  Arbitration  comprised of three (3) members,
         one of whom shall be selected by the selling  party and another of whom
         shall be selected by the  acquiring  party.  The third arbiter shall be
         appointed  by the two  arbiters  so  selected.  If either side fails to
         select an arbiter within fifteen (15) days after written  request to do
         so, then the other  party's  arbiter shall  unilaterally  establish the
         Appraised Value in a written  opinion.  The decision of the majority of
         said 
<PAGE>
Kenneth Bright
December 1, 1995
Page 3

         arbiters, or of the single arbiter if applicable, shall be binding upon
         the parties hereto.  If no two arbiters agree upon a single fair market
         value, it shall be the arithmetic  average of the values  determined by
         the two arbiters  whose  estimates are closest in value,  which average
         value shall be binding  upon the parties  hereto.  The  arbiters  shall
         render a written decision and shall conduct all proceedings pursuant to
         the Uniform  Arbitration  Act as adopted in the State of Arizona and to
         the  then  existing  rules  of  the  American  Arbitration  Association
         governing  commercial  transactions  to the  extent  such rules are not
         inconsistent  with such Act and this  Agreement.  Costs of  arbitration
         shall  be borne as  determined  by the  arbiters.  In  determining  the
         Appraised  Value,  no value shall be placed on the good will or name of
         the  Company  (except  that good  will may be  valued at an amount  not
         exceeding  its  unamortized  cost to the extent it represents a cost to
         the Company,  and all shares  shall be valued  equally,  i.e.,  without
         regard to majority or minority status of such shares.

                  (f)  "Permanent  Disability"  means  that you (1) are  under a
         legal  decree  of  incapacity  or  disability  pursuant  to title 14 of
         Arizona Revised Statutes or other applicable  statutes the date of such
         decree  being deemed to be the date on which such  disability  occurred
         for purposes of this agreement), or (2) submit any claim for disability
         insurance  benefits or for early  distribution  of the  amounts  from a
         qualified pension or profit-sharing  plan maintained by the Corporation
         on account of disability (the date of the earliest of such claims shall
         be the date on which such disability shall be deemed to have occurred),
         or (3) are  determined to be disabled  pursuant to a  Determination  of
         Disability.  A determination of Disability  means a determination  that
         you,  because of a medically  determinable  disease,  injury,  or other
         mental or physical disability,  are unable to perform substantially all
         of your  regular  duties  and that such  disability  is  determined  or
         reasonably  expected  to last at least  twelve  (12)  months,  based on
         then-available  medical  information.  The  Determination of Disability
         will  be  based  on the  written  opinion  of the  physician  regularly
         attending  you.  If the  Company  disagrees  with the  opinion  of such
         physician  (the First  Physician"),  it may  engage at its own  expense
         another  physician (the "Second  Physician") to examine you. The Second
         Physician  shall confer with the First  Physician and, if they together
         agree  in  writing  that  you are or are not  disabled,  their  written
         opinion  shall be conclusive  as to such  disability.  If the First and
         Second  Physicians do not agree,  they shall choose a third  consulting
         physician (the expense of which shall be borne by the Company), and the
         written  opinion of a majority of these three (3)  physicians  shall be
         conclusive as to such disability. The date of any written opinion which
         is conclusive to such disability is the date on which such  disability,
         if that is the  conclusion,  will be deemed to have occurred unless the
         opinion  expressly  establishes the date of occurrence.  In conjunction
         with this  Section,  you  consent to such  examination,  to furnish any
         medical information requested by any examining physician,  and to waive
         any  applicable  physician-patient  privilege that may arise because of
         such examination.  All physicians  except the First Physician  selected
         hereunder must be board-certified in the specialty most closely related
         to the nature of the disability alleged to exist.

                  (g) For so long as the Company's right to repurchase the Stock
         as set forth in this  Paragraph 3 remains  effective,  neither you, nor
         your personal representative(s),  devisee(s), heir(s), successor(s), or
         assignee(s)  shall sell,  assign or  otherwise  transfer  any shares of
         Stock or interest  therein without  obtaining the written  agreement of
         the purchaser, assignee or transferee that the shares remain subject to
         this repurchase  right, and you evidencing the Stock may be legended to
         reflect the foregoing restrictions.

                  (h) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of its common  stock to permit the  exercise of your option and all other
options granted or to be granted.

         5. It is contemplated that the common stock in the Company to be issued
to you upon exercise of your option will not be registered  under the Securities
Act of 1933, as amended (the "Act") or any applicable  state securities laws, in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance is otherwise in violation of  applicable  law at
the time  purchase  rights are exercised  under this option,  then
<PAGE>
Kenneth Bright
December 1, 1995
Page 4

the  Company's  obligation  to issue shares of its common stock upon exercise of
your option shall terminate. If such an exemption is available in the opinion of
such counsel,  and such issuance is not otherwise in violation of applicable law
you (or your personal representative(s), devisee(s), or heir(s)) will deliver to
the Company as a  condition  precedent  to giving  notice of each  exercise,  an
investment letter agreement in form and substance satisfactory to the Company to
enable the Company to comply with the Act or other  applicable  securities  laws
and which may,  among other  things,  limit or condition the right to dispose of
shares of Stock acquired by exercise of your option will be permitted only if in
the opinion of counsel  satisfactory  to the Company Ouch  disposition is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s),  or heirs(s))  deliver to the Company a letter agreement in form and
substance  satisfactory to the Company  whereby your  successor(s) or assign (6)
agrees to be bound by the terms and  conditions  of  paragraph  3 above and this
Paragraph 5. You (and your personal representative(s),  devisee(s), or heirs(s))
agree  to pay all  costs  of  obtaining  any  legal  opinions  and all  costs in
connection  with  proposed  exercise  of your option or  dispositions  of shares
acquired pursuant to your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition or other transfer by you of common stock issued to you upon exercise
of your options,  you agree to provide to the Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         8. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.




















         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.

         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 of this letter.  Any questions  concerning  any matter  relating to
your non-incentive stock option should also be addressed to the Secretary.
<PAGE>
Kenneth Bright
December 1, 1995
Page 5

                                          Very truly yours,

                                          H.E.R.C. Products Incorporated




                                          By   /s/  Gary S. Glatter
                                              ----------------------------------
                                          Its      Chief Operating Officer
                                              ----------------------------------



ACCEPTED AND AGREED:



/s/  Kenneth Bright
- -----------------------------
Kenneth Bright


























                                   EXHIBIT "A"

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
December  1,  1995 (the  "Agreement")  subject  to all the terms and  provisions
referred  to in  the  Agreement,  and  notify  you  of  my  desire  to  purchase
_______________  shares of Common Stock of H.E.R.C.  Products  Incorporated (the
<PAGE>
Kenneth Bright
December 1, 1995
Page 6

"Company")  which were  offered to me  pursuant to said  Option.  Enclosed is my
check in the sum of $______________ in full payment for such shares.

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option  granted  to me on  November  15,  1995 are  being  acquired  by me as an
investment  and  not  with a view  to,  or for  sale  in  connection  with,  the
distribution  of any such shares.  I also  represent  that I have read and fully
understand the Agreement,  including  without  limitation  the  restrictions  on
transfer of the shares hereby being acquired and the Company's repurchase rights
with  respect  to  such  shares.  I  agree  to  indemnify  the  Company  and its
subsidiaries, together with their respective officers and directors, against any
and all liabilities, losses, damages and expenses (including reasonable attorney
fees) arising from or in connection  with any  disposition  of the shares hereby
being acquired,  or any interest therein, in violation of applicable  securities
laws or  regulations.  I further  represent that I have been given access to all
information  necessary to allow me to make a decision as to the  advisability of
an  investment in the  Company's  stock and the value of such stock,  and that I
have the skill and experience necessary to make such decision.

         DATED:_____________________________, 19 ___ .




                                               _________________________________
                                               Employee 's Signature



                                               _________________________________
                                               Signature of Employee's Spouse



Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to  above,   which  shares  were   transferred   to  me  on  H.E.R.C.   Products
Incorporated's stock record books on _______________, 19___.



                                               _________________________________
                                               Employee

                                  March 1, 1996


Darin Thomas
5 Wheaton Circle
Greensboro, NC 27406

Dear Mr. Thomas:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive a  non-incentive  stock option and that on February  22, 1996,  you were
granted an option to purchase  Forty Thousand  (40,000)  shares of the Company's
Common Stock,  $.01 par value, at a price of $1.50 per share (the "Stock").  The
option  granted to you is subject to the terms and  conditions set forth in this
letter (the "Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise your option,  only in accordance  with  Paragraph 3
below,  by delivery to the Company (in care of its  Secretary)  at the principal
offices of the Company,  presently  located at 3622 North 34th Avenue,  Phoenix,
Arizona 85017,  written  irrevocable  notice of exercise in the form attached to
this letter as Exhibit A.  specifying the number of shares with respect to which
the option is being  exercised,  together with payment of the exercise price for
those  shares in cash or by check.  Any other form of  exercise or tender may be
refused  by  the  Company,  acting  through  the  Board  or  otherwise,  in  its
discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your  options  shall  vest on  December  1, 1996 as to the
         first 8,000 shares,  on December 1, 1997 as to the second 8,000 shares,
         on December 1, 1998 as to the third 8,000  shares,  on December 1, 1999
         as to the fourth 8,000  shares,  and on December 1, 2000 as to the last
         8,000 shares.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(h)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on December 1, 2001.

                  (c) In the event you leave the  employment  of the Company for
         any  reason  whatsoever,   including   termination  by  your  voluntary
         resignation or at the direction of the Company,  with or without cause,
         or of your death or Permanent Disability,  then, at your option, or the
         option  of  your   personal   representative,   you  or  your  personal
         representative  may  exercise  the option to the extent  vested and not
         previously  exercised or expired,  such exercise to occur no later than
         sixty (60) days following your last day of employment  with the Company
         or the date of your death or Permanent Disability,  as applicable,  and
         the  Company  (or its  nominee)  shall  have  the  right  (but  not the
         obligation)  to  purchase  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  under  the Plan  held by you  (including  shares
         acquired  pursuant to this  sentence) at a price equal to the Appraised
         Value per share of such Stock,  determined in accordance with Paragraph
         3(e).  The  Company  (or its  nominee)  shall  exercise  this  right to
         repurchase  the  shares  of Stock,  if at all,  within  six (6)  months
         following  the  date of the  termination  of your  employment  with the
         Company  by  delivering  written  notice  of  exercise  to you or  your
         personal representative.  Payment on such exercise by the Company shall
         be made in not more than five equal  annual  installments  of principal
         and accrued  interest (at an annual interest rate,  adjusted on a daily
         basis,  equal to the prime rate of interest publicly  announced an such
         from time to time by Bank One in Phoenix, Arizona due commencing on the
         Company's  (or  its  nominee's)  purchase  and on  the  next  four  (4)
         anniversaries of such purchase. The date for consummating 
<PAGE>
Darin Thomas
March 1, 1996
Page 2

         such purchase  shall be the sixtieth  (60th) day following  delivery of
         the  Company's  notice  of  exercise,  provided  that  such date may be
         extended by you or your personal  representative by written notice to a
         date not later  than the  earlier  of ten  (10)days  after all  holding
         periods  under  Section  422A of the  Internal  Revenue  Code expire or
         consummation of a transaction (e.g., merger, consolidation, stock sale)
         pursuant  to which  the  holder of your  shares  would be  entitled  to
         receive consideration of any kind.

                  (d) In the event  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  hereunder  or any  interest  therein,  are to be
         transferred,   voluntarily   or   involuntarily   (including,   without
         limitation,  any sale,  encumbrance,  foreclosure  or  transfer in lieu
         thereof,  or by operation  of law, any division of marital  property on
         account of divorce or legal  separation  being deemed a "transfer"  for
         purposes hereof, but excluding transfers to which Paragraph 3(c) hereof
         applies),  the  Company  (or its  nominee)  shall have a right of first
         refusal as follows: You (or the holder of such shares if not you) shall
         give the Company advance written notice  detailing all the terms of the
         proposed  transfer.  The Company (or its nominees) shall have the right
         (but not the obligation), exercisable upon delivery to the transferring
         shareholder  of written  notice of  acceptance  within thirty (30) days
         following receipt of the notice of proposed  transfer  described in the
         preceding  sentence,  to  repurchase  all or any of such  shares on the
         terms and  conditions  set-forth in such notice;  provided that the per
         share  purchase  price  shall be the lesser of (i) the price,  plus the
         Appraised Value of any non-cash consideration (determined in accordance
         with  the  procedures  specified  in  Paragraph  3(e)  below)  (or,  if
         applicable,  110% of the loan amount), stated in the notice or (ii) the
         Appraised Value of the shares,  determined in accordance with Paragraph
         3(e) (and shall be the Appraised  Value,  determined in accordance with
         Paragraph   3(e),  in  the  event  of  a  transfer  not  involving  any
         consideration);  and provided  further than the purchase price shall be
         payable,  at the election of the Company (or its  nominees),  either on
         the terms set forth in the  transferor's  notice or in up to five equal
         annual  installments  of principal  and accrued  interest (at an annual
         interest  rate,  adjusted on a daily basis,  equal to the prime rate of
         interest  publicly  announced  as such from time to time by Bank One in
         Phoenix,  Arizona) due  commencing on the Company's (or its  nominee's)
         purchase and on the next four (4)  anniversaries of such purchase.  The
         date for  consummating  such purchase shall be the sixtieth  (60th) day
         following  delivery  of the  Company's  (or its  nominees')  notice  of
         exercise,  provided that such date may be extended by the  transferring
         shareholder  by written  notice to a date not later than the earlier of
         ten (10) days after all holding  periods under Section 422A of the Code
         expire.  Failure by the Company (or its nominees)  (without  default by
         the  transferring  shareholder) to close such purchase within the above
         60 day period  shall  give the  transferring  shareholder  the right to
         transfer such shares or interest therein on the terms and to the person
         described in the notice during the 60 days following  expiration of the
         original 60-day period; provided that the shares or interest therein to
         be transferred shall for all purposes remain subject to this Agreement.
         If the transferring shareholder fails to close the proposed transfer on
         those terms within such second  60-day  period,  the proposed  transfer
         shall  again  be  subject  to  the  terms  of  this   Paragraph   3(d).
         Notwithstanding  the  foregoing,  such  shares  may be  transferred  or
         retransferred  without invoking this right of first refusal between you
         and trusts of which you and/or your  spouse are the sole  beneficiaries
         by giving  prior  written  notice  certifying  such a transfer is to be
         made;  provided  that  following any such  transfer,  such shares shall
         remain  subject  to this  right  of  first  refusal  and all the  other
         provisions of this agreement.

                  (e) The  "Appraised  Value" of a share of the Stock shall mean
         that value which is determined  pursuant to this  Paragraph  3(e).  The
         Appraised  Value  may  be  mutually  agreed  upon  by the  selling  and
         acquiring  parties  of the  shares  of  Stock.  If the  parties  cannot
         mutually  agree on the  Appraised  Value of a share of Stock within ten
         (10) days after  delivery of a written notice of exercise of a purchase
         right or obligation  hereunder,  then the Appraised Value of a share of
         Stock  shall  be  equal  to the  fair  market  value  of such  share as
         determined as of the date of  termination of your  employment  with the
         Company and in the  following  manner:  the fair market  value shall be
         determined  by a Board of  Arbitration  comprised of three (3) members,
         one of whom shall be selected by the selling  party and another of whom
         shall be selected by the  acquiring  party.  The third arbiter shall be
         appointed  by the two  arbiters  so  selected.  If either side fails to
         select an arbiter within fifteen (15) days after written  request to do
         so, then the other  party's  arbiter shall  
<PAGE>
Darin Thomas
March 1, 1996
Page 3

         unilaterally  establish the Appraised Value in a written  opinion.  The
         decision of the majority of said arbiters,  or of the single arbiter if
         applicable,  shall  be  binding  upon  the  parties  hereto.  If no two
         arbiters  agree  upon a  single  fair  market  value,  it  shall be the
         arithmetic  average of the values  determined by the two arbiters whose
         estimates  are closest in value,  which  average value shall be binding
         upon the parties hereto.  The arbiters shall render a written  decision
         and shall conduct all proceedings  pursuant to the Uniform  Arbitration
         Act as adopted in the State of Arizona and to the then  existing  rules
         of  the   American   Arbitration   Association   governing   commercial
         transactions  to the extent such rules are not  inconsistent  with such
         Act and  this  Agreement.  Costs  of  arbitration  shall  be  borne  as
         determined by the arbiters.  In  determining  the Appraised  Value,  no
         value shall be placed on the good will or name of the  Company  (except
         that good will may be valued at an amount not exceeding its unamortized
         cost to the extent it represents a cost to the Company,  and all shares
         shall be valued equally,  i.e.,  without regard to majority or minority
         status of such shares.

                  (f)  "Permanent  Disability"  means  that you (1) are  under a
         legal  decree  of  incapacity  or  disability  pursuant  to title 14 of
         Arizona Revised Statutes or other applicable  statutes the date of such
         decree  being deemed to be the date on which such  disability  occurred
         for purposes of this agreement), or (2) submit any claim for disability
         insurance  benefits or for early  distribution  of the  amounts  from a
         qualified pension or profit-sharing  plan maintained by the Corporation
         on account of disability (the date of the earliest of such claims shall
         be the date on which such disability shall be deemed to have occurred),
         or (3) are  determined to be disabled  pursuant to a  Determination  of
         Disability.  A determination of Disability  means a determination  that
         you,  because of a medically  determinable  disease,  injury,  or other
         mental or physical disability,  are unable to perform substantially all
         of your  regular  duties  and that such  disability  is  determined  or
         reasonably  expected  to last at least  twelve  (12)  months,  based on
         then-available  medical  information.  The  Determination of Disability
         will  be  based  on the  written  opinion  of the  physician  regularly
         attending  you.  If the  Company  disagrees  with the  opinion  of such
         physician  (the First  Physician"),  it may  engage at its own  expense
         another  physician (the "Second  Physician") to examine you. The Second
         Physician  shall confer with the First  Physician and, if they together
         agree  in  writing  that  you are or are not  disabled,  their  written
         opinion  shall be conclusive  as to such  disability.  If the First and
         Second  Physicians do not agree,  they shall choose a third  consulting
         physician (the expense of which shall be borne by the Company), and the
         written  opinion of a majority of these three (3)  physicians  shall be
         conclusive as to such disability. The date of any written opinion which
         is conclusive to such disability is the date on which such  disability,
         if that is the  conclusion,  will be deemed to have occurred unless the
         opinion  expressly  establishes the date of occurrence.  In conjunction
         with this  Section,  you  consent to such  examination,  to furnish any
         medical information requested by any examining physician,  and to waive
         any  applicable  physician-patient  privilege that may arise because of
         such examination.  All physicians  except the First Physician  selected
         hereunder must be board-certified in the specialty most closely related
         to the nature of the disability alleged to exist.

                  (g) For so long as the Company's right to repurchase the Stock
         as set forth in this  Paragraph 3 remains  effective,  neither you, nor
         your personal representative(s),  devisee(s), heir(s), successor(s), or
         assignee(s)  shall sell,  assign or  otherwise  transfer  any shares of
         Stock or interest  therein without  obtaining the written  agreement of
         the purchaser, assignee or transferee that the shares remain subject to
         this repurchase  right, and you evidencing the Stock may be legended to
         reflect the foregoing restrictions.

                  (h) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of its common  stock to permit the  exercise of your option and all other
options granted or to be granted.

         5. It is contemplated that the common stock in the Company to be issued
to you upon exercise of your option will not be registered  under the Securities
Act of 1933, as amended (the "Act") or any applicable  state securities laws, in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance 
<PAGE>
Darin Thomas
March 1, 1996
Page 4

is  otherwise in violation of  applicable  law at the time  purchase  rights are
exercised  under this option,  then the Company's  obligation to issue shares of
its common  stock upon  exercise  of your  option  shall  terminate.  If such an
exemption is available in the opinion of such counsel,  and such issuance is not
otherwise   in   violation   of   applicable   law   you   (or   your   personal
representative(s),  devisee(s),  or  heir(s))  will  deliver to the Company as a
condition  precedent to giving notice of each  exercise,  an  investment  letter
agreement  in form and  substance  satisfactory  to the  Company  to enable  the
Company to comply  with the Act or other  applicable  securities  laws and which
may,  among other  things,  limit or condition the right to dispose of shares of
Stock  acquired by exercise  of your  option  will be  permitted  only if in the
opinion  of counsel  satisfactory  to the  Company  Ouch  disposition  is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s),  or heirs(s))  deliver to the Company a letter agreement in form and
substance  satisfactory to the Company  whereby your  successor(s) or assign (6)
agrees to be bound by the terms and  conditions  of  paragraph  3 above and this
Paragraph 5. You (and your personal representative(s),  devisee(s), or heirs(s))
agree  to pay all  costs  of  obtaining  any  legal  opinions  and all  costs in
connection  with  proposed  exercise  of your option or  dispositions  of shares
acquired pursuant to your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition or other transfer by you of common stock issued to you upon exercise
of your options,  you agree to provide to the Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         8. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.




















         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.

         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 
<PAGE>
Darin Thomas
March 1, 1996
Page 5

of  this  letter.   Any  questions   concerning  any  matter  relating  to  your
non-incentive stock option should also be addressed to the Secretary.

                                               Very truly yours,

                                               H.E.R.C. Products Incorporated




                                               By   /s/  Gary S. Glatter
                                                   -----------------------------
                                               Its      President
                                                   -----------------------------



ACCEPTED AND AGREED:



/s/  Darin Thomas
- ---------------------------
Darin Thomas


























                                   EXHIBIT "A"

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
March 1, 1996 (the "Agreement") subject to all the terms and provisions referred
to in the  Agreement,  and notify you of my
<PAGE>
Darin Thomas
March 1, 1996
Page 6

desire to purchase  _______________ shares of Common Stock of H.E.R.C.  Products
Incorporated  (the "Company")  which were offered to me pursuant to said Option.
Enclosed  is my check in the sum of  $______________  in full  payment  for such
shares.

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option  granted  to me on  February  22,  1996 are  being  acquired  by me as an
investment  and  not  with a view  to,  or for  sale  in  connection  with,  the
distribution  of any such shares.  I also  represent  that I have read and fully
understand the Agreement,  including  without  limitation  the  restrictions  on
transfer of the shares hereby being acquired and the Company's repurchase rights
with  respect  to  such  shares.  I  agree  to  indemnify  the  Company  and its
subsidiaries, together with their respective officers and directors, against any
and all liabilities, losses, damages and expenses (including reasonable attorney
fees) arising from or in connection  with any  disposition  of the shares hereby
being acquired,  or any interest therein, in violation of applicable  securities
laws or  regulations.  I further  represent that I have been given access to all
information  necessary to allow me to make a decision as to the  advisability of
an  investment in the  Company's  stock and the value of such stock,  and that I
have the skill and experience necessary to make such decision.

         DATED:_____________________________, 19 ___ .




                                              __________________________________
                                              Employee 's Signature



                                              __________________________________
                                              Signature of Employee's Spouse



Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to  above,   which  shares  were   transferred   to  me  on  H.E.R.C.   Products
Incorporated's stock record books on _______________, 19___.



                                              __________________________________
                                              Employee


                                  April 1, 1996

Patrick E. Lien
1208 Moorefield Court
Virginia Beach, Virginia 23454

Dear Mr. Lien:

         I am happy to advise  you that you have been  selected  by the Board of
Directors (the "Board") of H.E.R.C.  Products  Incorporated (the "Company"),  to
receive  a  non-incentive  stock  option  and that on March 11,  1996,  you were
granted an option to purchase  Fifty Thousand  (50,000)  shares of the Company's
Common Stock, $.01 par value, at a price of $1.5625 per share (the "Stock"). The
option  granted to you is subject to the terms and  conditions set forth in this
letter (the "Agreement").

         The Board has imposed the following  terms and  conditions  relating to
your option and its exercise:

         1. You may exercise your option,  only in accordance  with  Paragraph 3
below,  by delivery to the Company (in care of its  Secretary)  at the principal
offices of the Company,  presently  located at 3622 North 34th Avenue,  Phoenix,
Arizona 85017,  written  irrevocable  notice of exercise in the form attached to
this letter as Exhibit A.  specifying the number of shares with respect to which
the option is being  exercised,  together with payment of the exercise price for
those  shares in cash or by check.  Any other form of  exercise or tender may be
refused  by  the  Company,  acting  through  the  Board  or  otherwise,  in  its
discretion.

         2. Your  option is not  transferable  other than by will or the laws of
descent and distribution and is exercisable,  during your lifetime, only by you.
You may not assign or otherwise transfer or encumber your option or any interest
in your option to any person in any way.

         3.       (a) Your  options  shall  vest on  December  1, 1996 as to the
         first  10,000  shares,  on  December  1, 1997 as to the  second  10,000
         shares,  on December 1, 1998 as to the third 10,000 shares, on December
         1, 1999 as to the fourth 10,000  shares,  and on December 1, 2000 as to
         the last 10,000 shares.

                  (b)  Notwithstanding  any other  provision  of this  Agreement
         (other than  Paragraph  3(h)  below),  your  option,  to the extent not
         previously  exercised,  shall  automatically  terminate  and  be  of no
         further force or effect as to all remaining  shares of Stock as of five
         o'clock p.m., M.S.T., on December 1, 2001.

                  (c) In the event you leave the  employment  of the Company for
         any  reason  whatsoever,   including   termination  by  your  voluntary
         resignation or at the direction of the Company,  with or without cause,
         or of your death or Permanent Disability,  then, at your option, or the
         option  of  your   personal   representative,   you  or  your  personal
         representative  may  exercise  the option to the extent  vested and not
         previously  exercised or expired,  such exercise to occur no later than
         sixty (60) days following your last day of employment  with the Company
         or the date of your death or Permanent Disability,  as applicable,  and
         the  Company  (or its  nominee)  shall  have  the  right  (but  not the
         obligation)  to  purchase  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  under  the Plan  held by you  (including  shares
         acquired  pursuant to this  sentence) at a price equal to the Appraised
         Value per share of such Stock,  determined in accordance with Paragraph
         3(e).  The  Company  (or its  nominee)  shall  exercise  this  right to
         repurchase  the  shares  of Stock,  if at all,  within  six (6)  months
         following  the  date of the  termination  of your  employment  with the
         Company  by  delivering  written  notice  of  exercise  to you or  your
         personal representative.  Payment on such exercise by the Company shall
         be made in not more than five equal  annual  installments  of principal
         and accrued  interest (at an annual interest rate,  adjusted on a daily
         basis,  equal to the prime rate of interest publicly  announced an such
         from time to time by Bank One in Phoenix, Arizona due commencing on the
         Company's  (or  its  nominee's)  purchase  and on  the  next  four  (4)
         anniversaries of such purchase. The date for consummating such purchase
         shall be the sixtieth  (60th) day  following  delivery of the Company's
         notice of 
<PAGE>
Patrick E. Lien
April 1, 1996
Page 2

         exercise,  provided  that  such  date  may be  extended  by you or your
         personal  representative by written notice to a date not later than the
         earlier of ten (10)days after all holding periods under Section 422A of
         the  Internal  Revenue  Code expire or  consummation  of a  transaction
         (e.g., merger, consolidation,  stock sale) pursuant to which the holder
         of your shares would be entitled to receive consideration of any kind.

                  (d) In the event  any  shares of Stock  acquired  pursuant  to
         exercise  of  options  hereunder  or any  interest  therein,  are to be
         transferred,   voluntarily   or   involuntarily   (including,   without
         limitation,  any sale,  encumbrance,  foreclosure  or  transfer in lieu
         thereof,  or by operation  of law, any division of marital  property on
         account of divorce or legal  separation  being deemed a "transfer"  for
         purposes hereof, but excluding transfers to which Paragraph 3(c) hereof
         applies),  the  Company  (or its  nominee)  shall have a right of first
         refusal as follows: You (or the holder of such shares if not you) shall
         give the Company advance written notice  detailing all the terms of the
         proposed  transfer.  The Company (or its nominees) shall have the right
         (but not the obligation), exercisable upon delivery to the transferring
         shareholder  of written  notice of  acceptance  within thirty (30) days
         following receipt of the notice of proposed  transfer  described in the
         preceding  sentence,  to  repurchase  all or any of such  shares on the
         terms and  conditions  set-forth in such notice;  provided that the per
         share  purchase  price  shall be the lesser of (i) the price,  plus the
         Appraised Value of any non-cash consideration (determined in accordance
         with  the  procedures  specified  in  Paragraph  3(e)  below)  (or,  if
         applicable,  110% of the loan amount), stated in the notice or (ii) the
         Appraised Value of the shares,  determined in accordance with Paragraph
         3(e) (and shall be the Appraised  Value,  determined in accordance with
         Paragraph   3(e),  in  the  event  of  a  transfer  not  involving  any
         consideration);  and provided  further than the purchase price shall be
         payable,  at the election of the Company (or its  nominees),  either on
         the terms set forth in the  transferor's  notice or in up to five equal
         annual  installments  of principal  and accrued  interest (at an annual
         interest  rate,  adjusted on a daily basis,  equal to the prime rate of
         interest  publicly  announced  as such from time to time by Bank One in
         Phoenix,  Arizona) due  commencing on the Company's (or its  nominee's)
         purchase and on the next four (4)  anniversaries of such purchase.  The
         date for  consummating  such purchase shall be the sixtieth  (60th) day
         following  delivery  of the  Company's  (or its  nominees')  notice  of
         exercise,  provided that such date may be extended by the  transferring
         shareholder  by written  notice to a date not later than the earlier of
         ten (10) days after all holding  periods under Section 422A of the Code
         expire.  Failure by the Company (or its nominees)  (without  default by
         the  transferring  shareholder) to close such purchase within the above
         60 day period  shall  give the  transferring  shareholder  the right to
         transfer such shares or interest therein on the terms and to the person
         described in the notice during the 60 days following  expiration of the
         original 60-day period; provided that the shares or interest therein to
         be transferred shall for all purposes remain subject to this Agreement.
         If the transferring shareholder fails to close the proposed transfer on
         those terms within such second  60-day  period,  the proposed  transfer
         shall  again  be  subject  to  the  terms  of  this   Paragraph   3(d).
         Notwithstanding  the  foregoing,  such  shares  may be  transferred  or
         retransferred  without invoking this right of first refusal between you
         and trusts of which you and/or your  spouse are the sole  beneficiaries
         by giving  prior  written  notice  certifying  such a transfer is to be
         made;  provided  that  following any such  transfer,  such shares shall
         remain  subject  to this  right  of  first  refusal  and all the  other
         provisions of this agreement.

                  (e) The  "Appraised  Value" of a share of the Stock shall mean
         that value which is determined  pursuant to this  Paragraph  3(e).  The
         Appraised  Value  may  be  mutually  agreed  upon  by the  selling  and
         acquiring  parties  of the  shares  of  Stock.  If the  parties  cannot
         mutually  agree on the  Appraised  Value of a share of Stock within ten
         (10) days after  delivery of a written notice of exercise of a purchase
         right or obligation  hereunder,  then the Appraised Value of a share of
         Stock  shall  be  equal  to the  fair  market  value  of such  share as
         determined as of the date of  termination of your  employment  with the
         Company and in the  following  manner:  the fair market  value shall be
         determined  by a Board of  Arbitration  comprised of three (3) members,
         one of whom shall be selected by the selling  party and another of whom
         shall be selected by the  acquiring  party.  The third arbiter shall be
         appointed  by the two  arbiters  so  selected.  If either side fails to
         select an arbiter within fifteen (15) days after written  request to do
         so, then the other  party's  arbiter shall  unilaterally  establish the
         Appraised Value in a written  opinion.  The decision of the majority of
         said 
<PAGE>
Patrick E. Lien
April 1, 1996
Page 3

         arbiters, or of the single arbiter if applicable, shall be binding upon
         the parties hereto.  If no two arbiters agree upon a single fair market
         value, it shall be the arithmetic  average of the values  determined by
         the two arbiters  whose  estimates are closest in value,  which average
         value shall be binding  upon the parties  hereto.  The  arbiters  shall
         render a written decision and shall conduct all proceedings pursuant to
         the Uniform  Arbitration  Act as adopted in the State of Arizona and to
         the  then  existing  rules  of  the  American  Arbitration  Association
         governing  commercial  transactions  to the  extent  such rules are not
         inconsistent  with such Act and this  Agreement.  Costs of  arbitration
         shall  be borne as  determined  by the  arbiters.  In  determining  the
         Appraised  Value,  no value shall be placed on the good will or name of
         the  Company  (except  that good  will may be  valued at an amount  not
         exceeding  its  unamortized  cost to the extent it represents a cost to
         the Company,  and all shares  shall be valued  equally,  i.e.,  without
         regard to majority or minority status of such shares.

                  (f)  "Permanent  Disability"  means  that you (1) are  under a
         legal  decree  of  incapacity  or  disability  pursuant  to title 14 of
         Arizona Revised Statutes or other applicable  statutes the date of such
         decree  being deemed to be the date on which such  disability  occurred
         for purposes of this agreement), or (2) submit any claim for disability
         insurance  benefits or for early  distribution  of the  amounts  from a
         qualified pension or profit-sharing  plan maintained by the Corporation
         on account of disability (the date of the earliest of such claims shall
         be the date on which such disability shall be deemed to have occurred),
         or (3) are  determined to be disabled  pursuant to a  Determination  of
         Disability.  A determination of Disability  means a determination  that
         you,  because of a medically  determinable  disease,  injury,  or other
         mental or physical disability,  are unable to perform substantially all
         of your  regular  duties  and that such  disability  is  determined  or
         reasonably  expected  to last at least  twelve  (12)  months,  based on
         then-available  medical  information.  The  Determination of Disability
         will  be  based  on the  written  opinion  of the  physician  regularly
         attending  you.  If the  Company  disagrees  with the  opinion  of such
         physician  (the First  Physician"),  it may  engage at its own  expense
         another  physician (the "Second  Physician") to examine you. The Second
         Physician  shall confer with the First  Physician and, if they together
         agree  in  writing  that  you are or are not  disabled,  their  written
         opinion  shall be conclusive  as to such  disability.  If the First and
         Second  Physicians do not agree,  they shall choose a third  consulting
         physician (the expense of which shall be borne by the Company), and the
         written  opinion of a majority of these three (3)  physicians  shall be
         conclusive as to such disability. The date of any written opinion which
         is conclusive to such disability is the date on which such  disability,
         if that is the  conclusion,  will be deemed to have occurred unless the
         opinion  expressly  establishes the date of occurrence.  In conjunction
         with this  Section,  you  consent to such  examination,  to furnish any
         medical information requested by any examining physician,  and to waive
         any  applicable  physician-patient  privilege that may arise because of
         such examination.  All physicians  except the First Physician  selected
         hereunder must be board-certified in the specialty most closely related
         to the nature of the disability alleged to exist.

                  (g) For so long as the Company's right to repurchase the Stock
         as set forth in this  Paragraph 3 remains  effective,  neither you, nor
         your personal representative(s),  devisee(s), heir(s), successor(s), or
         assignee(s)  shall sell,  assign or  otherwise  transfer  any shares of
         Stock or interest  therein without  obtaining the written  agreement of
         the purchaser, assignee or transferee that the shares remain subject to
         this repurchase  right, and you evidencing the Stock may be legended to
         reflect the foregoing restrictions.

                  (h) In its sole discretion,  the Board may waive or accelerate
         vesting of options, or waive or extend expiration dates, other than the
         final expiration date.

         4. The Company will reserve or keep  available at all times  sufficient
shares of its common  stock to permit the  exercise of your option and all other
options granted or to be granted.

         5. It is contemplated that the common stock in the Company to be issued
to you upon exercise of your option will not be registered  under the Securities
Act of 1933, as amended (the "Act") or any applicable  state securities laws, in
reliance  on  exemptions  from  registration  thereunder.  If in the  opinion of
counsel  satisfactory  to the Company no  exemption  from  registration  is then
available,  or if such issuance is otherwise in violation of  applicable  law at
the time  purchase  rights are exercised  under this option,  then 
<PAGE>
Patrick E. Lien
April 1, 1996
Page 4

the  Company's  obligation  to issue shares of its common stock upon exercise of
your option shall terminate. If such an exemption is available in the opinion of
such counsel,  and such issuance is not otherwise in violation of applicable law
you (or your personal representative(s), devisee(s), or heir(s)) will deliver to
the Company as a  condition  precedent  to giving  notice of each  exercise,  an
investment letter agreement in form and substance satisfactory to the Company to
enable the Company to comply with the Act or other  applicable  securities  laws
and which may,  among other  things,  limit or condition the right to dispose of
shares of Stock acquired by exercise of your option will be permitted only if in
the opinion of counsel  satisfactory  to the Company Ouch  disposition is not in
violation  of the  Act,  any  applicable  state  securities  laws  or any  other
applicable law, regulation or rule, and you (or your personal representative(s),
devisee(s),  or heirs(s))  deliver to the Company a letter agreement in form and
substance  satisfactory to the Company  whereby your  successor(s) or assign (6)
agrees to be bound by the terms and  conditions  of  paragraph  3 above and this
Paragraph 5. You (and your personal representative(s),  devisee(s), or heirs(s))
agree  to pay all  costs  of  obtaining  any  legal  opinions  and all  costs in
connection  with  proposed  exercise  of your option or  dispositions  of shares
acquired pursuant to your option.

         6. You agree to pay to the Company or to make arrangements satisfactory
to the Board to pay to the Company,  at such time as any income is recognized by
you with respect to this option, any Federal,  state, or local taxes of any kind
required by law to be withheld  on such income by the  Company.  In the event of
disposition or other transfer by you of common stock issued to you upon exercise
of your options,  you agree to provide to the Company  promptly  written  notice
describing in reasonable  detail the disposition or transfer,  including without
limitation the sale price, if any, and date of transfer or disposition.

         7. This option  granted to you is governed by, and shall be interpreted
according to, the laws of the State of Arizona.

         8. Each  party  hereto  agrees to do all such  things and take all such
actions,  and to make, execute and deliver such other documents and instruments,
as shall be reasonably requested to carry out the provisions, intent and purpose
of this Agreement.




















         This  letter  only  grants the  options  described  above and is not an
employment  agreement or a promise or assurance of continued  employment for any
period of time including any period of time necessary to permit full exercise of
the options under Paragraph 1 above.

         Please  acknowledge  your  receipt of this  letter,  together  with the
materials  referred to herein and your  agreement to the terms and conditions of
your option as set forth herein by signing the enclosed  copy of this letter and
returning  it promptly to the  Secretary of the Company at the address set forth
in Section 1 of this letter.  Any questions  concerning  any matter  relating to
your non-incentive stock option should also be addressed to the Secretary.
<PAGE>
Patrick E. Lien
April 1, 1996
Page 5

                                              Very truly yours,

                                              H.E.R.C. Products Incorporated




                                              By   /s/  Gary S. Glatter
                                                  ------------------------------
                                              Its      President
                                                  ------------------------------



ACCEPTED AND AGREED:



/s/  Patrick E. Lien
- --------------------------
Patrick E. Lien


























                                   EXHIBIT "A"

                          NOTICE OF EXERCISE OF OPTION
              TO PURCHASE SHARES OF H.E.R.C. PRODUCTS INCORPORATED
                          AND RECORD OF STOCK TRANSFER

         I hereby  exercise my Stock Option  granted  pursuant to a letter dated
April 1, 1996 (the "Agreement") subject to all the terms and provisions referred
to in the  Agreement,  and notify you of my desire to  purchase  _______________
shares    of    Common    Stock    of   H.E.R.C.  Products   Incorporated   (the
<PAGE>
Patrick E. Lien
April 1, 1996
Page 6

"Company")  which were  offered to me  pursuant to said  Option.  Enclosed is my
check in the sum of $______________ in full payment for such shares.

         I hereby  represent that the __________  shares of the Company's Common
Stock to be  delivered  to me  pursuant to the  above-mentioned  exercise of the
Option granted to me on March 11, 1996 are being acquired by me as an investment
and not with a view to, or for sale in connection  with, the distribution of any
such  shares.  I also  represent  that I have  read  and  fully  understand  the
Agreement,  including  without  limitation the  restrictions  on transfer of the
shares hereby being acquired and the Company's repurchase rights with respect to
such shares.  I agree to indemnify  the Company and its  subsidiaries,  together
with their respective  officers and directors,  against any and all liabilities,
losses,  damages and expenses (including  reasonable attorney fees) arising from
or in connection with any  disposition of the shares hereby being  acquired,  or
any interest therein, in violation of applicable securities laws or regulations.
I further  represent that I have been given access to all information  necessary
to allow me to make a decision as to the  advisability  of an  investment in the
Company's  stock  and the  value of such  stock,  and that I have the  skill and
experience necessary to make such decision.

         DATED:_____________________________, 19 ___ .




                                                 _______________________________
                                                 Employee 's Signature



                                                 _______________________________
                                                 Signature of Employee's Spouse



Receipt is hereby acknowledged of the delivery to me by _____________________ on
_______________  of stock  certificates  for  _______  shares  of  Common  Stock
purchased by me pursuant to the terms and  conditions of the Agreement  referred
to  above,   which  shares  were   transferred   to  me  on  H.E.R.C.   Products
Incorporated's stock record books on _______________, 19___.



                                                 _______________________________
                                                 Employee

                                                                     EXHIBIT 5.1



                                 October 3, 1996




H.E.R.C. Products Incorporated
3622 North 34th Avenue
Phoenix, Arizona 85017

Dear Sirs:

                  Reference  is made to the  Registration  Statement on Form S-8
("Registration  Statement") filed by H.E.R.C. Products Incorporated ("Company"),
a Delaware  corporation,  under the Securities Act of 1933, as amended  ("Act"),
with respect to an aggregate of 2,170,000 shares of common stock, par value $.01
per share  ("Common  Stock"),  to be offered by the Company  under the Company's
1993 Incentive Stock Option Plan, 1996 Performance Equity Plan and certain other
employment stock option plans under separate written agreements ("Plans").

                  We have examined  such  documents  and  considered  such legal
matters as we have deemed  necessary  and  relevant as the basis for the opinion
set  forth  below.  With  respect  to  such  examination,  we have  assumed  the
genuineness of all signatures, the authenticity of all documents submitted to us
as originals, the conformity to original documents of all documents submitted to
us as reproduced or certified  copies,  and the authenticity of the originals of
those latter  documents.  As to questions of fact material to this  opinion,  we
have, to the extent deemed appropriate,  relied upon certain  representations of
certain  officers and  employees  of the  Company.  We have also assumed that in
granting  future  awards  under the 1993  Incentive  Stock  Option Plan and 1996
Performance  Equity  Plan,  the  Board  of  Directors  of  the  Company  or  the
appropriate  committee  thereunder  will exercise its discretion in establishing
the terms of such awards within the  permissible  limits of the law of the State
of Delaware.

                  Based upon the  foregoing,  it is our opinion  that the Common
Stock to be issued by the Company under the Plans,  when sold in accordance with
the terms of the Plans and the individual  instruments governing their issuance,
will be legally  issued,  fully  paid and  nonassessable,  although  they may be
subject to  contractual  restrictions  established  by the  applicable  Plans or
instrument.

                  In giving this opinion,  we have assumed that all certificates
for the Company's shares of Common Stock, prior to their issuance,  will be duly
executed on behalf of the Company by the Company's transfer agent and registered
by the  Company's  registrar,  if  necessary,  and will  conform,  except  as to
denominations, to specimens which we have examined.

                  We hereby  consent to the use of this opinion as an exhibit to
the  Registration  Statement,  to the use of our name as your counsel and to all
references  made  to us in the  Registration  Statement  and  in the  Prospectus
forming a part thereof.  In giving this consent,  we do not hereby admit that we
are
<PAGE>
H.E.R.C. Products Incorporated
October 3, 1996
Page 14




in the category of persons whose consent is required under Section 7 of the Act,
or the rules and regulations promulgated thereunder.

                                Very truly yours,


                                GRAUBARD MOLLEN & MILLER

                                                                    EXHIBIT 23.1


                             CONSENT OF INDEPENDENT
                          CERTIFIED PUBLIC ACCOUNTANTS



H.E.R.C. PRODUCTS INCORPORATED
Phoenix, Arizona


We  hereby  consent  to  the   incorporation  by  reference  in  the  Prospectus
constituting  a part of the  Registration  Statement  (No.  333- ) of our report
dated  February  2,  1996,  except  for Note 13 as to which the date is April 5,
1996,  relating to the consolidated  financial  statements of H.E.R.C.  PRODUCTS
INCORPORATED  and  subsidiary  appearing in the Company's  Annual Report on Form
10-KSB for the year ended December 31, 1995.


/s/ BDO Seidman, LLP

BDO SEIDMAN, LLP

Chicago, Illinois
September 30, 1996


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