SEASHORE TETRACHEM LABS


                               2225 S Huron Drive

                               Santa Ana CA 92704

                     Phone (714) 556-0196 FAX (714) 556-6120


                  CONSULTANT, INDEPENDENT CONTRACTOR AGREEMENT


     THIS  AGREEMENT is made and entered into this 3 day of APRIL,  2000, by and
                                                  ---       ------------
between ADVANCE MEDICAL SYSTEMS INC place of business and corporate headquarters
        ---------------------------
at: 2950 GLASSELL ST Orange CA 92865
    --------------------------------

"Company")  TETRACHEM  INC; its  principal  place of business  2225 S. HURON DR.
            --------------                                     -----------------
Santa Ana CA, 92704  (Hereinafter  referred to as the  "Consultant,  Independent
- -------------------
Contractor").


     WHEREAS  the  company  is in the  business  of  Medical  Devices  (In Vitro
                                                     ---------------------------
Diagnostics)
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     WHEREAS  Consultant,  Independent  Contractor is engaged in the business of
Consulting (Regulatory Affairs, FDA, CCHA, EPA ect.)
- ----------------------------------------------------

     WHEREAS  Consultant,  Independent  Contractor is willing to enter into this
Agreement for the performance of services as an independent  contractor upon the
terms and conditions set forth herein:

     NOW,  THEREFORE,  is  consideration  of the initial promises and agreements
hereinafter set forth, the parties hereto agree as follows:

     1.   The  Company  hereby  agrees to  retain  the  Consultant,  Independent
Contractor as an  independent  contractor,  for the amount of $5000.00 per month
                                                    ----------------------------
(50% cash and 50% AMS private stock @ $5.00/share.).
- ---------------------------------------------------

     2.   Consultant, Independent Contractor hereby agrees that he/she/it shall,
at all times during the term of this Agreement,  use all reasonable best efforts
to perform his/her/its duties and fulfill his obligations in the FDA Regulations
                                                                 ---------------
required by 21CFR and all other federal, state and local regulations.
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     3.   Consultant, Independent Contractor shall perform the service hereunder
as an  independent  contractor  and shall not be  subject  to the  direction  or
control of the  Company  with  respect to the manner in which the  services  are
performed.  Consultant,  Independent  Contractor  shall be considered  under the
provisions  of this  Agreement or  otherwise as having an employee  status or as
being entitled to participate in any plans or  arrangements  pertaining to or in
connection with any pension, bonus, profit-sharing or similar benefits which the
Company  provides.   It  is  further  agreed  and  understood  that  Consultant,






Independent  Contractor may engage his own agents,  servants, or employees,  and
shall not be considered to be the agents, servants, or employees of the Company.
Consultant,  Independent  Contractor shall be solely liable for any wages, fees,
expenses,  insurance  and  withholding  taxes  which are  required to be paid or
withheld in connection with payments made by Consultant,  Independent Contractor
to or on behalf of  his/her/its  agents,  servants,  or  employees.  Consultant,
Independent  Contractor  further  agrees to maintain  and keep his own books and
records  with respect to any of  his/her/its  agents,  servants  and  employees.
Consultant,  Independent Contractor's only relationship with the Company is that
of an independent contractor as enumerated in this Agreement.

     4.   Consultant,  Independent  Contractor  shall  not call  upon,  solicit,
divert, or take away or attempt to call upon, solicit,  divert, or take away any
of the Company's  trade  secrets,  including  customers,  upon whom  Consultant,
Independent  Contractor or any of his/her/its  agents,  servants,  and employees
called upon, solicited,  catered,  became acquainted with, or acquired knowledge
of after entering into this Agreement.

     5.   Consultant,  Independent  Contractor  and any and all of  his/hers/its
agents, servants and employees,  shall strive diligently to maintain and enhance
the  reputation,   usefulness  and  acceptance  of  the  Company,  servants  and
employees,  shall  strive  diligently  to maintain  and enhance the  reputation,
usefullness and acceptance of the Company.  Consultant,  Independent  Contractor
further agrees that he will adhere to the industry's professional standards, and
will  perform  any and all  acts  required  under  this  Agreement  in a  manner
consistent with generally  accepted  procedures and standards within the MEDICAL
                                                                         -------
DEVICE industry.
- ------

     6.   Consultant, Independent Contractor hereby agrees to advise the Company
of applicable  governmental  laws, rules and regulations which may be applicable
to the performance of services hereunder,  including but not limited to Federal,
State,  Municipal rules and regulations  which may be imposed at locations where
such services are performed.

     7.   Consultant,  Independent  Contractor  agrees  that the  Company is not
liable  for  any  acts  done by  Consultant,  Independent  Contractor  or any of
his/her/its agents, servants, or employees in the furtherance of this Agreement.
In the  event  the  Company  shall  be  required  to pay any sums  because  of a
determination  of a Court or  other  legal  body  that  Consultant,  Independent
Contractor is anything other than an independent contractor, or Consultant,

     8.   Any waiver,  alteration,  or  modification of any of the provisions of
this  Agreement  shall  not  be  binding,   unless  the  waiver   alteration  or
modification  is in  writing,  and sited by the  parties  and  his/her/its  duly
authorized representative.

     9.   Any assignment of this Agreement, without the prior written consent of
the other, shall be void, and shall constitute a material breach hereof.

     10.  The term and life of this  Agreement  shall  commence  on the 3 day of
                                                                       ---
April 2000 and shall continue in full force and effect until April 1, 2001
- ----------

     11.  Either party shall have the right to terminate this  Agreement,  prior
to the  expiration  of the  terms  hereof,  upon  the  occurrence  of any of the
following:

          a)  Any  breach  or  default  by  any  party  of  any  of  the  terms,







obligations, covenants and representations under this Agreement,

          b) Any party to this  Agreement  fails or refuses  to use  his/her/its
best efforts in the furtherance of this Agreement,

          c) Any part of this  Agreement  is declared  insolvent,  or  bankrupt,
declares  bankruptcy,  retakes an assignment for the benefit of creditors,  or a
receiver is  appointed,  or any  proceeding  is demanded  by, for or against any
party,  under  the  provisions  of the  Federal  Bankruptcy  Act or  code or any
Amendment hereto.

          d) Consultant,  Independent  Contractor  violates the Company's  Trade
Secrets.

          e) Any party  reasonably  determines  that any party is conducting its
business  or acting in a manner  which  impairs the value or  reputation  of any
party to this Agreement.

          f) Upon thirty (30) days prior  written  notice to all parties to this
Agreement of his/her/its intent to terminate this Agreement.

     12.  The term and life of this  Agreement  shall not  extend or be  renewed
past the date set  forth  herein  above,  unless an  extension  or  renewal,  in
writing,  is  signed  by all  the  parties  herein,  Of  their  duly  authorized
representatives,  prior to the  expiration  date of this  Agreement as set forth
above.

     13.  All communications  regarding this Agreement,  and any and all notices
required shall be in writing.

     14.  This Agreement shall be deemed to have been entered into in the County
of ORANGE  State of  California,  and all  questions  concerning  the  validity,
   ------
interpretation of performance of any of its terms or provisions or of any rights
or  obligations  of the parties  hereto,  shall be  governed by and  resolved in
accordance  with  the  laws of the  State  of  California.  The  parties  hereto
expressly  agree  that the  proper  forum  for the  resolution  of any  disputes
regarding this Agreement shall be in the County of ORANGE State of California.
                                                   ------

     15.  The parties  hereto agree that this  Agreement  shall  constitute  the
entire Agreement of the Parties

WHEREFORE,  THE  BELOW  SIGNED  PARTIES  HAVE  READ  THE  FOREGOING  CONSULTANT,
INDEPENDENT  CONTRACTOR'S  AGREEMENT,  AND  KNOW  AND  UNDERSTAND  THE  CONTENTS
THEREOF.

     By signing below, I certify that all information is true and correct,



COMPANY:                                      CONSULTANT, INDEPENDENT CONTRACTOR



NAME:(Print) /s/ AMS by Peter George
            -----------------------------     -----------------------------







                                              Advanced Medical Systems, Inc.
TEL:  714-283-5190
FAX:  714-283-5191






F A X



To:         Perry Rucker                           From: Peter George
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Fax:        556-6120                               Date: 04/10/00
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Phone:                                             Page:
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Re:                                                CC:
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[ ] Urgent [ ] For Review [ ] Please Comment [ ] Please Reply [ ] Please Recycle

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Comments:

Perry:

Our copy under item # 3 is missing the word NOT the second sentence, after
                                            ---
Contractor shall ______.

Our copy of item # 12 has a misspelling of the word duly, ours say's dul.

We would like to incorporate this verbiage under section 1, after the
$5.00/share.)

We would like this included (During the period from April 3, 2000 and the
expected date of funding on or about August 1, 2000 ) the fee for services shall
be $1,500.00 per month, 50% cash and 50 AMS private stock @ $5.00/share. It is
also agreed that the fee of $5,000.00 per month is subject to AMS obtaining the
necessary lending to continue this project as outlined in attached Tetrachem
Outline of services.

Please review the above statement for consideration and make your comments.

Thanks

/s/ Peter George                                    /s/ OK, Perry G. Rucker
                                                                    6/13/00