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                                                                   EXHIBIT 10.15

                                                                AMPAM PARENT/MGT


                              EMPLOYMENT AGREEMENT

         This Employment Agreement (the "Agreement") by and between American
Plumbing and Mechanical, Inc., a Delaware corporation (the "Company" or "AMPAM")
and all its subsidiaries, and Robert A. Christianson ("Executive") is hereby
entered into effective as of April 1, 1999.

                                    RECITALS

         Whereas, as of the Effective Date, the Company and the subsidiaries of
the Company (the Company and such subsidiaries being collectively, the "AMPAM
Companies") provide plumbing and mechanical contracting services; and

         Whereas, the Company wishes to employ Executive, and Executive wishes
to be employed by the Company, on the terms set forth herein; and

         Whereas, in the course of his employment with the Company, Executive
will become familiar with and aware of information as to the AMPAM Companies'
customers and specific manner of doing business, including the processes,
techniques and trade secrets used by the AMPAM Companies, and future plans with
respect thereto, all of which has been and will be established and maintained at
great expense to the AMPAM Companies and which constitutes trade secrets and the
valuable goodwill of the AMPAM Companies.

         Therefore, in consideration of the mutual promises, terms, covenants
and conditions set forth herein and the performance of each, it is hereby agreed
as follows:


                                   AGREEMENTS

1.       Employment and Duties.

         a.       The Company hereby employs Executive as the Chief Executive
                  Officer of the Company. As such, Executive shall have the
                  responsibilities, duties and authority customarily
                  appertaining to such office and such other duties as may be
                  reasonably assigned to Executive and which are consistent with
                  such position. Executive shall report to the Chief Executive
                  Officer of the Company unless otherwise directed by the Board
                  of Directors. Executive hereby accepts this employment upon
                  the terms and conditions herein contained and, subject to
                  paragraph 1(c), agrees to devote substantially all of his
                  time, attention and efforts during normal business hours,
                  excluding any periods of vacation or sick leave, to promote
                  and further the business and interests of the Company and its
                  affiliates.




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         b.       Executive shall faithfully adhere to, execute and fulfill all
                  reasonable and lawful policies established by the Company, to
                  the extent such policies have been communicated to Executive
                  in writing and are not inconsistent with any of the terms of
                  this Agreement.

         c.       Except as set forth on Schedule 1c. hereto, Executive shall
                  not, during the term of his employment hereunder, engage in
                  any other business activity pursued for gain, profit or other
                  pecuniary advantage to the extent such activity interferes
                  materially with Executive's duties and responsibilities
                  hereunder. The foregoing limitations shall not prohibit
                  Executive from making personal investments in such form or
                  manner as will not materially interfere with Executive's
                  Performance of his duties under this Agreement.

         d.       Executive shall be entitled to vacation in accordance with the
                  policies of the Company for similarly-situated employees.

2.       Compensation. For all services rendered by Executive, the Company shall
         compensate Executive as follows:

         a.       Base Salary. The base salary payable to Executive during the
                  term shall be $220,000.00 per year ("Base Salary") payable in
                  accordance with the Company's payroll procedures for officers,
                  but not less frequently than twice monthly. On an annual basis
                  such base salary shall be reviewed by the Board of Directors
                  of the Company (the "Board"), and may be adjusted at its
                  discretion in light of the Executive's position,
                  responsibilities, performance and such other reasonable, job
                  related factors that the Board deems appropriate; provided,
                  however, as adjusted Base Salary may not be less than that
                  amount in effect on the Effective Date.

         b.       Annual Bonus. The Company will consider adopting an incentive
                  bonus plan under which Executive and other officers of the
                  Company will be eligible to receive annual bonus awards in
                  amounts that are competitive with those provided to similarly
                  situated executives and commensurate with the performance of
                  the AMPAM Companies, as reasonably determined by the Board.

         c.       Executive Perquisites and Benefits. Executive shall be
                  entitled to receive additional benefits and compensation from
                  the Company in the form and to the extent specified below:

                  i.       Executive shall be reimbursed for all business travel
                           and other out-of-pocket expenses reasonably incurred
                           by Executive in the performance of his duties
                           pursuant to this Agreement and in accordance with the
                           Company's policy for its officers, including, without
                           limitation, continuing education, license and
                           administrative fees. All such expenses shall be
                           appropriately documented in

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                           reasonable detail by Executive upon submission of any
                           request for reimbursement, and in a format and manner
                           consistent with the Company's expense reporting
                           policy.

                  ii.      Executive shall be entitled to participate in all
                           bonus and incentive compensation plans and to receive
                           all fringe benefits and perquisites offered by the
                           Company to any of the Company's similarly situated
                           executives, including, without limitation,
                           participation in the various employee benefit plans
                           or programs provided to the employees of the Company
                           in general, subject to the regular eligibility
                           requirements with respect to each of such benefit
                           plans or programs, and such other benefits or
                           perquisites as may be approved for Executive by the
                           Board during the term of this Agreement, all on a
                           basis as favorable to Executive as may be provided or
                           offered by the Company to other comparable officers
                           (in terms of position) of the Company.
                           Notwithstanding the above, until the Company
                           establishes employee welfare and pension benefit
                           plans for its officers, Executive shall participate
                           in such plans of the AMPAM Companies as may be
                           designated.

                  Notwithstanding the above, the Board may offer or provide to
                  Executive, or to any other officer or executive of the Company
                  or any AMPAM Company, special compensation, benefits, and/or
                  perquisites, in order to attract or retain that executive or
                  officer where the Board determines, in its discretion, that
                  the offer or provision of such special compensation, benefits,
                  and/or perquisites are in the best interests of AMPAM or any
                  AMPAM Company. Should the Board make such determination and
                  offer or provide special compensation, benefits and/or
                  perquisites to an officer or executive, Executive will not
                  automatically be entitled to such special compensation,
                  benefits and/or perquisites.

                  iii.     Until such time as Executive becomes eligible for
                           coverage under a group health plan of AMPAM, the
                           Company shall monthly reimburse Executive for any
                           COBRA continuation premiums paid by Executive for his
                           coverage after the Effective Date.

3.       Non-Competition Agreement.

         a.       Executive acknowledges that as a consequence of his employment
                  with the Company, he will be furnished or have access to
                  Confidential Information (as defined below). Executive further
                  recognizes that the Company's willingness to enter into this
                  Agreement is based in material part on Executive's agreement
                  to the provisions of this paragraph 3 and that Executive's
                  breach of the provisions of this paragraph 3 could materially
                  damage the Company. Subject to the further provisions of this
                  Agreement, Executive will not, during the term of his
                  employment with the Company and for a period of two years
                  immediately following the termination of such

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                  employment for any reason, directly or indirectly, for himself
                  or on behalf of or in conjunction with any other person,
                  company, partnership, corporation or business of whatever
                  nature:

                  i.       engage, as an officer, director, shareholder, owner,
                           partner, joint venture, or in a managerial capacity,
                           whether as an employee, independent contractor,
                           consultant or advisor, or as a sales representative,
                           whether paid or unpaid, in any plumbing, piping,
                           mechanical, heating, ventilation or air conditioning
                           contracting; installation or services business
                           directly related thereto (such business and
                           operations referred to herein as the "Plumbing and
                           Mechanical Business"), in direct competition with any
                           of the AMPAM Companies within 100 miles of where any
                           of the AMPAM Companies conducts business including
                           any territory serviced by any of the AMPAM Companies
                           during the term of Executive's employment (the
                           "Territory");

                  ii.      call upon any person who is, at that time, an
                           employee of the AMPAM Companies for the purpose or
                           with the intent of enticing such employee away from
                           or out of the employ of the AMPAM Companies;

                  iii.     call upon any person or entity which is, at that
                           time, or which has been, within one year prior to
                           that time, a customer of the AMPAM Companies within
                           the Territory for the purpose of soliciting
                           customers, orders or contracts for any Plumbing and
                           Mechanical Business within the Territory;

                  iv.      call upon any prospective acquisition candidate, on
                           Executive's own behalf or on behalf of any
                           competitor, which candidate was, to Executive's
                           knowledge after due inquiry, either called upon by
                           the AMPAM Companies or for which the AMPAM Companies
                           made an acquisition analysis, for the purpose of
                           acquiring such entity;

                  v.       disclose customers, whether in existence or proposed,
                           of the AMPAM Companies to any person, firm,
                           partnership, corporation or business for any reason
                           or purpose whatsoever except to the extent that the
                           AMPAM Companies has in the past disclosed such
                           information to the public, any person, firm,
                           partnership, corporation, business, or other entity,
                           for valid business reasons; or

                  vi.      testify as an expert witness in plumbing and
                           mechanical services matters for an adverse party to
                           any of the AMPAM Companies in litigation; provided
                           that nothing contained in this paragraph 3(a)(vi)
                           shall interfere with Executive's duty to testify as a
                           witness if required by law.


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                           Notwithstanding the above, the foregoing covenant
                           shall not be deemed to prohibit Executive from
                           acquiring as an investment (i) not more than 1% of
                           the capital stock of a company engaged in the
                           Plumbing and Mechanical Business, whose stock is
                           traded on a national securities exchange, the NASDAQ
                           Stock Market or on an over-the-counter or similar
                           market or (ii) not more than 1% of the capital stock
                           of a competing business whose stock is not publicly
                           traded if the Board consents to such acquisition. Any
                           ownership interest in any business which is in
                           competition with the AMPAM Companies shall
                           immediately be disclosed to the Board by Executive.

         b.       Because of the difficulty of measuring economic losses to the
                  Company as a result of a breach of the foregoing covenant, and
                  because of the immediate and irreparable damage that could be
                  caused to the Company for which they would have no other
                  adequate remedy, Executive agrees that foregoing covenant may
                  be enforced by the Company, in the event of breach by him, by
                  injunctions, restraining orders, and orders of specific
                  performance issued by a court of competent jurisdiction.
                  Executive further agrees to waive any requirement for the
                  Company's securing or posting of any bond in connection with
                  such remedies.

         c.       It is agreed by the parties that the foregoing covenants in
                  this paragraph 3 impose a reasonable restraint on Executive in
                  light of the activities and business of the AMPAM Companies on
                  the date of the execution of this Agreement and the current
                  plans of the AMPAM Companies; but it is also the intent of the
                  Company and Executive that, subject to paragraph 3(g) hereof,
                  such covenants be construed and enforced in accordance with
                  the changing activities, business and locations of the AMPAM
                  Companies throughout the term of this covenant, whether before
                  or after the date of termination of the employment of
                  Executive, unless the Executive was conducting such new
                  business prior to the AMPAM Companies conducting such new
                  business. For example, if, during the term of Executive's
                  employment, any of the AMPAM Companies engages in new and
                  different activities, enters a new business or establishes new
                  locations for its current or new activities or business in
                  addition to or other than the activities or business
                  enumerated under the Recitals above or the locations currently
                  established therefor, then, subject to paragraph 3g. hereof,
                  through the term of this covenant Executive will be precluded
                  from soliciting the customers or employees of such new
                  activities or business or from such new location and from
                  directly competing with such new business activities, or
                  locations within 100 miles of where such new activities,
                  business or locations are conducted, unless Executive was
                  conducting such new activities or business prior to any of the
                  AMPAM Companies conducting such new activities or business.

         d.       It is further agreed by the parties hereto that, in the event
                  that Executive shall cease to be employed hereunder and shall
                  enter into a business or pursue other activities not in
                  competition with the Plumbing and Mechanical Business of the
                  AMPAM

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                  Companies or related activities or business in locations the
                  operation of which, under such circumstances, does not violate
                  clause (a)(i) of this paragraph 3, and in any event such new
                  business, activities or location are not in violation of this
                  paragraph 3 or of Executive's obligations under this paragraph
                  3, if any, Executive shall not be chargeable with a violation
                  of this paragraph 3 if the AMPAM Companies shall at any time
                  after the termination of Executive's employment enter the
                  same, similar or a competitive (i) business, (ii) course of
                  activities or (iii) location, as applicable.

         e.       The covenants in this paragraph 3 are severable and separate,
                  and the non-enforceability of any specific covenant shall not
                  affect the provisions of any other covenant. Moreover, in the
                  event any court of competent jurisdiction shall determine that
                  the scope, time or territorial restrictions set forth are
                  unreasonable, then it is the intention of the parties that
                  such restrictions be enforced to the fullest extent which the
                  court deems reasonable, and the Agreement shall thereby be
                  reformed.

         f.       All of the covenants in this paragraph 3 shall be construed as
                  an agreement independent of any other provision in this
                  Agreement, and the existence of any claim or cause of action
                  of Executive against any of the AMPAM Companies, whether
                  predicated on this Agreement or otherwise, shall not
                  constitute a defense to the enforcement by the Company of such
                  covenants. It is specifically agreed that the period of two
                  years (subject to the further provisions of this Agreement)
                  following termination of employment stated at the beginning of
                  this paragraph 3, during which the agreements and covenants of
                  Executive made in this paragraph 3 shall be effective, shall
                  be computed by excluding from such computation any time during
                  which Executive is in violation of any provision of this
                  paragraph 3.

         g.       The Company and the Executive hereby agree that this covenant
                  is a material and substantial part of this transaction.

4.       Term; Termination; Rights on Termination. The term of this Agreement
         shall begin on the Effective Date and continue for five years (the
         "Initial Term"), unless terminated sooner as herein provided; however,
         beginning on the fifth anniversary of the Effective Date and on each
         anniversary thereafter the term shall automatically continue for one
         year on the same terms and conditions contained herein in effect as of
         the time of renewal (the "Extended Term") unless not less than six
         months prior to any such anniversary either party shall give written
         notice to the other party that the term shall not be so extended;
         provided further, however, upon a Change in Control (as defined in
         paragraph 11(e)) during the Initial Term or any Extended Term the term
         of this Agreement shall automatically continue following such Change in
         Control for a period equal to the then remaining term or two years,
         whichever period is longer (such longer period being an Extended Term),
         unless earlier terminated as provided in paragraph 11. This Agreement
         and Executive's employment may be terminated in any one of the
         followings ways:


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         a.       Death. The death of Executive shall immediately terminate this
                  Agreement with no severance compensation due Executive's
                  estate; provided, however, for the 90-day period following
                  Executive's death, the Company, at its sole cost and expense,
                  shall continue to provide Executive's then qualified
                  beneficiaries with coverage under the Company's group health
                  plan in which Executive participated immediately prior to
                  Executive's death or a successor plan thereto, subject to the
                  terms of such plan as it may be amended ("Company Health
                  Plan"). Thereafter, the Company shall provide continuation of
                  coverage elections to such qualified beneficiaries as are
                  required by law.

         b.       Disability. If Executive becomes entitled to and receives
                  benefits under an insured long term disability plan of the
                  AMPAM Companies (incurs a "Disability"), the Company, with the
                  approval of a majority of the members of the Board, may
                  terminate this Agreement and Executive's employment hereunder.
                  In the event this Agreement is terminated as a result of
                  Executive's Disability, Executive shall have no right to any
                  severance compensation; provided, however, (i) for 12 months
                  thereafter or until Executive's death, if earlier, the Company
                  shall continue to pay Executive an amount equal to Executive's
                  monthly adjusted Base Salary (computed by reference to
                  Executive's annual adjusted Base Salary at the time of his
                  termination) reduced by any cash benefits payable to Executive
                  under such long term disability plan and (ii) the Company, at
                  its sole cost and expense, shall continue the coverage of
                  Executive and his qualified beneficiaries (for as long as they
                  are qualified beneficiaries thereunder) under the Company
                  Health Plan for as long as Executive continues to qualify for
                  and receive benefits under such long term disability plan, but
                  not to exceed five years. Thereafter, the Company shall
                  provide continuation of coverage elections to Executive and
                  his qualified beneficiaries as required by law.

         c.       Cause. The Company may terminate this Agreement and
                  Executive's employment for "Cause", which shall be: (1)
                  Executive's willful and material breach of this Agreement
                  (which remains uncured at the end of a 30-day period);
                  provided, that none of the following shall constitute Cause
                  for purposes of this clause (1): isolated incidences of (A)
                  bad judgement, (B) negligence, or (C) any act or omission that
                  Executive believed in good faith to have been in or not
                  opposed to the interest of the Company; (2) Executive's gross
                  negligence in the performance or intentional nonperformance
                  (in either case continuing for 30 days after receipt of
                  written notice of need to cure) of any of Executive's material
                  duties and responsibilities hereunder; (3) Executive's
                  dishonesty or fraud with respect to the business, reputation
                  or affairs of the AMPAM Companies; or (4) Executive's
                  conviction of a felony crime involving moral turpitude. Any
                  termination for Cause must be approved by a majority of the
                  eligible members of the Board (for this purpose, any member of
                  the

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                  Board reasonably believed by a majority of the Board to be at
                  fault in the events leading the Board to consider terminating
                  Executive for Cause shall also be excluded, including
                  Executive if Executive is a member of the Board). For purposes
                  hereof, no act, or failure to act, on Executive's part shall
                  be deemed "willful" unless done, or omitted to be done, by
                  Executive not in good faith and/or without reasonable belief
                  that Executive's action or omission was in the best interest
                  of the Company. Notwithstanding the foregoing, Executive shall
                  not be deemed to have been terminated for Cause unless and
                  until there shall have been delivered to Executive a Notice of
                  Termination and a copy of a resolution duly adopted by the
                  Board, finding that, in the good faith opinion of the Board,
                  Executive was guilty of conduct set forth above and specifying
                  the particulars thereof in detail. In the event of a
                  termination for Cause, Executive shall have no right to any
                  severance compensation.

                  i.       The Company may not terminate Executive's employment
                           for Cause unless:

                           (1)      no fewer than 30 days prior to the Date of
                                    Termination, the Company provides Executive
                                    with written notice (the "Notice of
                                    Consideration") of its intent to consider
                                    termination of Executive's employment for
                                    Cause, including a detailed description of
                                    the specific reasons which form the basis
                                    for such consideration;

                           (2)      for a period of not less than 25 days after
                                    the date Notice of Consideration is
                                    provided, Executive shall have the
                                    opportunity to appear before the Board, with
                                    or without legal representation, at
                                    Executive's election, to present arguments
                                    and evidence on his own behalf; and

                           (3)      following the presentation to the Board as
                                    provided in (2) above or Executive's failure
                                    to appear before the Board at a date and
                                    time specified in the Notice of
                                    Consideration (which date shall not be more
                                    than 30 days after the date the Notice of
                                    Consideration is provided), Executive may be
                                    terminated for Cause only if the Board, by
                                    majority vote of its eligible voters,
                                    determines that the actions or inactions of
                                    Executive specified in the Notice of
                                    Consideration, or reasonably related and/or
                                    later-discovered actions or inactions,
                                    occurred, that such actions or inactions
                                    constitute Cause, and that Executive's
                                    employment should accordingly be terminated
                                    for Cause;

                  ii.      Unless the Company (A) complies with the substantive
                           and procedural requirements of this Section 4.c.
                           prior to a Termination of Employment for Cause, and
                           (B) concludes, in its good faith discretion that
                           Executive's action or inaction specified in the
                           Notice of Termination for Cause did occur and


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                           constituted Cause, any Termination of Employment
                           shall be deemed a termination without Cause for all
                           purposes of this Agreement.

                  iii.     After providing a notice of need to cure or Notice of
                           Consideration pursuant to the provisions of this
                           Section 4.c., the Board may, by the affirmative vote
                           of all of its members (excluding for this purpose
                           Executive if he is a member of the Board, and any
                           other member of the Board reasonably believed by the
                           Board to be at fault in the events leading to issuing
                           the Notice of Consideration), suspend Executive with
                           pay until a final determination pursuant to this
                           Section 4.c. has been made.

         d.       Without Cause or For Good Reason. Executive may only be
                  terminated without Cause and other than due to Disability by
                  the Company during either the Initial Term or Extended Term if
                  such termination is approved by a majority of the members of
                  the Board. Should Executive be terminated by the Company
                  without Cause and other than due to Disability or should
                  Executive terminate with Good Reason during the Initial Term,
                  Executive shall receive from the Company, in addition to any
                  accrued but unpaid salary, bonus and benefits, a lump sum
                  payment due on the effective date of termination, an amount
                  equivalent to the annual adjusted Base Salary at the rate then
                  in effect for (i) whatever time period is remaining under the
                  Initial Term (but in no event more than two years) or (ii) for
                  one year, whichever amount is greater. Should Executive be
                  terminated by the Company without Cause and other than due to
                  Disability or should Executive terminate with Good Reason
                  during the Extended Term, Executive shall receive from the
                  Company, in a lump sum payment due on the effective date of
                  termination, an amount equivalent to the adjusted Base Salary
                  at the rate then in effect for one year. Further, any
                  termination by the Company without Cause or due to Disability
                  or by Executive for Good Reason whether during the Initial
                  Term or any Extended Term shall operate to shorten the period
                  set forth in paragraph 3.a. and during which the terms of
                  paragraph 3. apply to one year from the date of termination of
                  employment. If Executive resigns or otherwise terminates his
                  employment without Good Reason, rather than the Company
                  terminating his employment pursuant to that paragraph 4.d.,
                  Executive shall receive no severance compensation.

         e.       Executive shall have "Good Reason" to terminate his employment
                  hereunder as a consequence of any of the following events,
                  unless such event is agreed to in writing by Executive: (a) a
                  material reduction in his authority, title, responsibilities
                  or duties; (b) Executive's adjusted Base Salary is reduced
                  below that in effect on the Effective Date; (c) the relocation
                  of the Company's principal executive offices or Executive's
                  principal office to a location outside the state of Texas
                  without a commensurate adjustment in Executive's Base Annual
                  Salary to reflect any increase in cost of living as measured
                  by comparing the applicable regional or local consumer price
                  indices; (d) the assignment to Executive of any duties or
                  responsibilities which are materially

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                  inconsistent with Executive's title, position or
                  responsibilities as in effect immediately prior to such
                  assignment; (e) the failure by the Company to continue in
                  effect any employee benefit plan in which Executive
                  participates and/or any perquisite provided Executive, which
                  is (are) material to Executive's total compensation and
                  benefits, unless an equitable arrangement (embodied in an
                  ongoing substitute or alternative plan) has been made with
                  respect to such plan or perquisite, or the failure by the
                  Company to continue Executive's participation therein, or any
                  action by the Company which would materially reduce
                  Executive's participation therein or reward opportunities
                  thereunder; (f) the failure of the Company to obtain a
                  satisfactory agreement from any successor or assign of the
                  Company to assume and agree to perform this Agreement, as
                  contemplated in paragraph 10.; (g) a material breach of this
                  Agreement by the Company (including failure of the Company to
                  pay Executive on a timely basis the amounts to which Executive
                  is entitled under this Agreement); provided, however, Good
                  Reason shall exist with respect to a matter only if such
                  matter is not corrected by the Company within 30 days of its
                  receipt of written notice of such matter from Executive, and
                  in no event shall a termination by Executive occurring more
                  than 60 days following the date of an event described above be
                  a termination for Good Reason due to such event.

         f.       If termination of Executive's employment arises out of the
                  Company's failure to pay Executive on a timely basis the
                  amounts to which Executive is entitled under this Agreement or
                  as a result of any other breach of this Agreement by the
                  Company, as determined by a court of competent jurisdiction or
                  pursuant to the provisions of paragraph 18. below, the Company
                  shall pay all amounts and damages to which Executive may be
                  entitled as a result of such breach, including interest
                  thereon and all reasonable legal fees and expenses and other
                  costs incurred by Executive to enforce his rights hereunder.
                  Further, none of the provisions of paragraph 3. shall apply in
                  the event this Agreement is terminated as a result of a breach
                  by the Company.

         g.       Resignation Without Good Reason. Executive may, without Good
                  Reason (as hereinafter defined), terminate this Agreement and
                  Executive's employment, effective 30 days after written notice
                  is provided to the Company. If Executive resigns or otherwise
                  terminates his employment without Good Reason, rather than the
                  Company terminating his employment pursuant to that paragraph
                  4.d., Executive shall receive all accrued but unpaid salary,
                  bonus and benefits. Under no circumstance where Executive
                  terminates Executive's employment without Good Reason, shall
                  Executive be entitled to any pro rata share or payment of any
                  bonus or other compensation which has not yet been determined
                  or which requires employment at the time of the determination
                  or award for eligibility.

         h.       Upon termination of this Agreement for any reason provided
                  above, in addition to the above payments, if any, Executive
                  shall be entitled to receive all compensation


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                  earned, accrued vacation and reimbursements due through the
                  effective date of termination, paid to Executive in a lump sum
                  on the effective date of termination. In addition, a
                  termination of this Agreement shall not alter or impair any of
                  Executive's vested rights or benefits, if any, under any (i)
                  employee benefit plan of the AMPAM Companies or (ii) deferred
                  compensation plan, including, without limitation, any stock
                  option plan, of the AMPAM Companies. In addition,
                  notwithstanding any other provision of this Agreement, upon
                  termination of this Agreement other than (i) by the Company
                  for Cause, (ii) by Executive without Good Reason and in the
                  absence of a Change in Control or (iii) at the expiration of
                  the Initial Term or any Extended Term pursuant to a timely
                  notice, all options to purchase the stock of the Company (or
                  any successor thereof) and all similar equity-based awards,
                  outstanding granted or issued on the date hereof shall, at the
                  time of such termination, become vested without regard to any
                  vesting schedule thereof and in the case of options, shall be
                  exercisable for the greater of two years from the date of such
                  termination or the period provided in such award. All other
                  rights and obligations of the Company and Executive under this
                  Agreement shall cease as of the effective date of termination,
                  except that Executive's obligations under paragraphs 3., 5.,
                  6., 7., and 8. herein and the Company's obligations under
                  paragraphs 11.g. and 14. shall survive such termination in
                  accordance with their terms, unless or except as expressly
                  provided otherwise in this Agreement.

5.       Return of Company Property. All records, designs, patents, business
         plans, financial statements, manuals, memoranda, lists and other
         property delivered to or compiled by Executive by or on behalf of any
         of the AMPAM Companies or their representatives, vendors or customers
         which pertain to the business of any AMPAM Companies shall be and
         remain the property of the AMPAM Companies, as the case may be, and be
         subject at all times to their discretion and control. Likewise, all
         correspondence, reports, records, charts, advertising materials and
         other similar data pertaining to the business, activities or future
         plans of the AMPAM Companies which is collected by Executive shall be
         delivered promptly to the Company without request by it upon
         termination of Executive's employment and Executive shall not retain
         any copies of the same.

6.       Intellectual Property. Executive shall disclose promptly to the Company
         any and all conceptions, ideas, designs, plans, know-how, processes,
         improvements and other discoveries, whether patentable or not, which
         (i) are conceived or made by Executive, solely or jointly with another,
         during the period of employment or thereafter, (ii) are directly
         related to the plumbing and mechanical business or activities of the
         AMPAM Companies, and (iii) Executive conceives as a result of his
         employment by the Company, including any predecessor (collectively, the
         "Intellectual Property"). Executive hereby assigns and agrees to assign
         all his interests therein to the Company or its nominee. Whenever
         requested to do so by the Company, Executive shall execute any and all
         applications, assignments or other instruments that the Company shall
         deem necessary to apply for and obtain Letters Patent of the United
         States or any foreign country or to otherwise protect the Company's
         interest

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         therein. Executive must also render to the Company, at the Company's
         expense, assistance in the perfection, enforcement and defense of any
         Intellectual Property.

7.       Trade Secrets. Executive agrees that he will not, during or after the
         term of this Agreement, disclose the specific terms of the AMPAM
         Companies' relationships or agreements with its respective vendors or
         customers or any other trade secret of the AMPAM Companies, whether in
         existence or proposed, to any person, firm, partnership, corporation or
         business for any reason or purpose whatsoever, except as required by
         law and prior to any such disclosure Executive shall give the Company
         prior written notice thereof and the opportunity to contest such
         disclosure.

8.       Confidentiality.

         a.       Executive acknowledges and agrees that all Confidential
                  Information (as defined below) of the Company is confidential
                  and a valuable, special and unique asset of the Company that
                  gives the Company an advantage over its actual and potential,
                  current and future competitors. Executive further acknowledges
                  and agrees that Executive owes the Company a fiduciary duty to
                  preserve and protect all Confidential Information from
                  unauthorized disclosure or unauthorized use, that certain
                  Confidential Information constitutes "trade secrets" under
                  applicable laws and, that unauthorized disclosure or
                  unauthorized use of the Confidential Information would
                  irreparably injure the Company. Both during the term of
                  Executive's employment and after the termination of
                  Executive's employment for any reason (including wrongful
                  termination), Executive shall hold all Confidential
                  Information in strict confidence, and shall not use any
                  Confidential Information except for the benefit of the
                  Company, in accordance with the duties assigned to Executive.
                  Executive shall not, at any time (either during or after the
                  term of Executive's employment), disclose any Confidential
                  Information to any person or entity (except other employees of
                  the Company who have a need to know the information in
                  connection with the performance of their employment duties,
                  and who have been informed of the confidential nature of the
                  confidential information and have agreed to keep it
                  confidential), or copy, reproduce, modify, transmit, including
                  electronic transmission, decompile or reverse engineer any
                  Confidential Information, or remove any Confidential
                  Information from the Company's premises, without the prior
                  written consent of the Board, or permit any other person to do
                  so. Executive shall take reasonable precautions to protect the
                  physical security of all documents and other material
                  containing Confidential Information (regardless of the medium
                  on which the Confidential Information is stored). This
                  Agreement applies to all Confidential Information, whether now
                  known or later to become known to Executive.

         b.       Upon the termination of Executive's employment with the
                  Company for any reason, and upon written request of the
                  Company at any other time, Executive shall promptly surrender
                  and deliver to the Company all documents and other written
                  material of any

                                      -12-

   13


                  nature containing or pertaining to any Confidential
                  Information and shall not retain any such document or other
                  material. Within ten days of a written request by the Company,
                  Executive shall certify to the Company in writing that all
                  such materials have been returned.

                  As used in this Agreement, the term "Confidential Information"
                  shall mean any information or material known to or used by or
                  for the AMPAM Companies (whether or not owned or developed by
                  the AMPAM Companies and whether or not developed by Executive)
                  that is not generally known to persons in the Plumbing and
                  Mechanical Business, except as provided in this paragraph.
                  Confidential Information includes, but is not limited to, the
                  following: all trade secrets of the AMPAM Companies; all
                  information that the AMPAM Companies have marked as
                  confidential or has otherwise described to Executive (either
                  in writing or orally) as confidential; all nonpublic
                  information concerning the AMPAM Companies' products,
                  services, prospective products or services, research, product
                  designs, prices, discounts, costs, marketing plans, marketing
                  techniques, market studies, test data, customers, customer
                  lists and records, suppliers and contracts; all AMPAM
                  Companies' business records and plans; all AMPAM Companies'
                  personnel files; all financial information of or concerning
                  the AMPAM Companies; all information relating to operating
                  system software, application software, software and system
                  methodology, hardware platforms, technical information,
                  inventions, computer programs and listings, source codes,
                  object codes, copyrights and other intellectual property; all
                  technical specifications; any proprietary information
                  belonging to the AMPAM Companies; all computer hardware or
                  software manuals; all training or instruction manuals; and all
                  data and all computer system passwords and user codes. For
                  purposes hereof, Confidential Information shall not include
                  such information (i) which becomes or is already known to the
                  public or some other party through no fault of Executive; or
                  (ii) the disclosure of which (x) is required by law (including
                  regulations and rulings) or the order of any competent
                  governmental authority or (y) Executive reasonably believes is
                  required in connection with the defense of a lawsuit against
                  Executive, provided that in either case, prior to disclosing
                  any information, Executive shall give prior written notice
                  thereof to the Company and provide the Company with the
                  opportunity to contest such disclosure.

9.       No Prior Agreements. Executive hereby represents and warrants to the
         Company that the execution of this Agreement by Executive and his
         employment by the Company and the performance of his duties hereunder
         will not violate or be a breach of any agreement, including any
         non-competition agreement, invention or secrecy agreement, with a
         former employer, client or any other person or entity. Further,
         Executive agrees to indemnify the Company for any loss, including but
         not limited to, reasonable attorneys' fees and expenses, the Company
         may incur based upon or arising out of Executive's breach of this
         paragraph 9.

10.      Assignment, Binding Effect. Executive understands that he has been
         selected for employment by the Company on the basis of his personal
         qualifications, experience and skills. Executive agrees, therefore,
         that he cannot assign all or any portion of his performance under this
         Agreement. Subject to the preceding two sentences and the express
         provisions of paragraph 12. below, this Agreement shall be binding
         upon, inure to the benefit of and be enforceable by the parties hereto
         and their respective heirs, legal representatives,


                                      -13-

   14



         successors and assigns. The Company will require any successor (whether
         direct or indirect, by purchase, merger, consolidation or otherwise) to
         all or substantially all of the business and assets of the Company to
         expressly assume and agree in writing reasonably satisfactory to
         Executive to perform this Agreement in the same manner and to the same
         extent that the Company would be required to perform it if no such
         succession had taken place. Failure of the Company to obtain such
         written agreement prior to the effectiveness of any such succession
         shall be a material breach of this Agreement.

11.      Change in Control.

         a.       Executive understands and acknowledges that the Company may be
                  merged or consolidated with or into another entity and that
                  such entity shall automatically succeed to the rights and
                  obligations of the Company hereunder or that the Company may
                  undergo a Change in Control (as defined below). In the event a
                  Change in Control is initiated or occurs during the Initial
                  Term or an Extended Term, then the provisions of this
                  paragraph 11. shall be applicable.

         b.       In the event of a Change in Control wherein the Company and
                  Executive have not received written notice at least ten
                  business days prior to the date of the event giving rise to
                  the Change in Control from the successor to all or a
                  substantial portion of the Company's business and/or assets
                  that such successor is willing as of the closing to assume and
                  agrees to perform, or continue to cause the Company to
                  perform, the Company's obligations under this Agreement in the
                  same manner and to the same extent that the Company is hereby
                  required to perform, then Executive may, at Executive's sole
                  discretion, elect to terminate Executive's employment on the
                  effective date of such Change in Control by providing written
                  notice to the Board at least five business days prior to the
                  closing of the transaction giving rise to the Change in
                  Control. In such case, Executive shall be deemed to have
                  terminated Executive's employment for Good Reason on such
                  date; provided, however, the amount of the lump sum severance
                  payment due Executive shall be triple the amount calculated
                  under the terms of paragraph 4.d., but shall in no event
                  exceed nine times Executive's Base Annual Salary as in effect
                  at the time of termination.

         c.       In any Change in Control situation, Executive may, at
                  Executive's sole discretion, elect to terminate Executive's
                  employment upon the effective date of such Change in Control
                  by providing written notice to the Board at least five
                  business days prior to the closing of the transaction giving
                  rise to the Change in Control. In such case, Executive shall
                  be deemed to have terminated Executive's employment for Good
                  Reason on such date; provided, however, the amount of the lump
                  sum severance payment due Executive shall be double the amount
                  calculated under the terms of paragraph 4.d., but shall in no
                  event exceed six times Executive's Base Annual Salary as in
                  effect at the time of termination.


                                      -14-

   15




         d.       If, on or within two years following the effective date of a
                  Change in Control the Company terminates Executive's
                  employment other than for Cause or Disability or Executive
                  terminates his employment for Good Reason, or if Executive's
                  employment with the Company is terminated by the Company
                  within three months before the effective date of a Change in
                  Control and it is reasonably demonstrated that such
                  termination (i) was at the request of a third party that has
                  taken steps reasonably calculated to effect a Change in
                  Control, or (ii) otherwise arose in connection with or
                  anticipation of a Change in Control, then Executive shall
                  receive from Company, in a lump sum payment due on the
                  effective date of termination, the greater of (i) the
                  equivalent of three times Executive's Base Annual Salary at
                  the rate then in effect, or (ii) the base salary for whatever
                  period is then remaining on the Initial Term, if any, which
                  payment shall be in lieu of any amounts otherwise payable
                  pursuant to paragraph 4.d.

         e.       A "Change in Control" shall be deemed to have occurred if:

                  i.       any person, entity or group (as such terms are used
                           in Sections 13d. and 14(d)(2) of the Securities
                           Exchange Act of 1934, as amended (the "Act")), other
                           than persons and entities which owned any capital
                           stock of the Company at the closing date of the
                           transactions contemplated in the Acquisition
                           Agreements, the AMPAM Companies or an employee
                           benefit plan of the AMPAM Companies, acquires,
                           directly or indirectly, the beneficial ownership (as
                           defined in Section 13(d) of the Act) of any voting
                           security of the Company and immediately after such
                           acquisition such person, entity or group is, directly
                           or indirectly, the beneficial owner of voting
                           securities representing [35]% or more of the total
                           voting power of all of the then outstanding voting
                           securities of the Company entitled to vote generally
                           in the election of directors;

                  ii.      upon the first purchase of the Company's common stock
                           pursuant to a tender or exchange offer (other than a
                           tender or exchange offer made by the Company);

                  iii.     the stockholders of the Company shall approve a
                           merger, consolidation, recapitalization or
                           reorganization of the Company, or a reverse stock
                           split of outstanding voting securities, or
                           consummation of any such transaction if stockholder
                           approval is not obtained, other than any such
                           transaction which would result in at least 75% of the
                           total voting power represented by the voting
                           securities of the surviving entity outstanding
                           immediately after such transaction being beneficially
                           owned by the holders of all of the outstanding voting
                           securities of the Company immediately prior to the
                           transactions with the voting power of each such
                           continuing holder relative to other such continuing
                           holders not substantially altered in the transaction;

                                      -15-

   16




                  iv.      the stockholders of the Company shall approve a plan
                           of complete liquidation or dissolution of the Company
                           or an agreement for the sale or disposition by the
                           Company of all or substantially all of the Company's
                           assets; or

                  v.       if, at any time during any period of two consecutive
                           years, individuals who at the beginning of such
                           period constitute the Board cease for any reason to
                           constitute at least a majority thereof, unless the
                           election or nomination for the election by the
                           Company's stockholders of each new director was
                           approved a vote of at least two-thirds of the
                           directors then still in office who were directors at
                           the beginning of the period.

         f.       Notwithstanding anything in this Agreement to the contrary, a
                  termination pursuant to paragraph 11.b., c., or d. shall
                  operate to automatically waive in full the non-competition
                  restrictions imposed on Executive pursuant to paragraph 3.

         g.       If it shall be determined that any payment made or benefit
                  provided to Executive in connection with a change in control
                  (as defined in Section 280G of the Internal Revenue Code of
                  1986, as amended (the "Code"), or any successor thereto) of
                  the Company occurring after the Effective Date and on or
                  before the termination of this Agreement, whether or not made
                  or provided pursuant to this Agreement, is subject to the
                  excise tax imposed by Section 4999 of the Code, the Company
                  shall pay Executive an amount of cash (the "Additional
                  Amount") such that the net amount received by Executive after
                  paying all applicable taxes on such Additional Amount and any
                  penalties, interest and other reasonable costs incurred as a
                  result of such excise tax or additional payment, shall be
                  equal to the amount that Executive would have received if
                  Section 4999 were not applicable.

12.      No Mitigation or Offset. Executive shall not be required to mitigate
         the amount of any Company payment provided for in this Agreement by
         seeking other employment or otherwise. The amount of any payment
         required to be paid to Executive by the Company pursuant to this
         Agreement shall not be reduced by any amounts that are owed to the
         Company by Executive, provided that Executive (i) executes and delivers
         to the Company a promissory note evidencing a promise by Executive to
         pay the full amount of any amounts owed to the Company within 12 months
         from the date of Executive's termination of employment and (ii)
         provides such collateral reasonably satisfactory to the Company to
         ensure payment of such promissory note.

13.      Release. Notwithstanding anything in this Agreement to the contrary,
         Executive shall not be entitled to receive any severance payments
         pursuant to paragraphs 4. or 11. of this Agreement unless Executive has
         executed (and not revoked) a general release of all claims, known or
         unknown, Executive may have against the Company, its subsidiaries,
         their directors, officers, and employees, in a form of such release
         reasonably acceptable to the Company.


                                      -16-

   17




14.      Indemnification. In the event Executive is made a party to any
         threatened, pending or completed action, suit or proceeding, whether
         civil, derivative, subrogation, criminal, administrative or
         investigative (other than an action by the Company against Executive
         and a derivative action shall not be considered an action by the
         Company), by reason of the fact that he is or was performing services
         for the Company or any of the AMPAM Companies or any present or future
         subsidiary thereof, or as an executive officer of the AMPAM Companies
         prior to the date of this Agreement, then the Company shall indemnify
         Executive against all expenses (including attorneys' fees), judgments,
         fines and amounts paid in settlement, as actually and reasonably
         incurred by Executive in connection therewith. In the event that both
         Executive and the Company are made a party to the same third-party
         action, complaint, suit or proceeding, the Company agrees to engage
         competent legal representation, and Executive agrees to use the same
         representation, provided that if counsel selected by the Company shall
         have a conflict of interest that prevents such counsel from
         representing Executive, Executive may engage separate counsel and the
         Company shall pay as incurred all reasonable attorneys' fees and
         reasonable expenses of such separate counsel, provided further that
         Executive may at any time, at Executive's sole expense, hire separate
         counsel to represent Executive in such matter. Further, while Executive
         is expected at all times to use his best efforts to faithfully
         discharge his duties under this Agreement, Executive cannot be held
         liable to the Company for errors or omissions made in good faith where
         Executive has not exhibited gross, willful and wanton negligence and
         misconduct nor performed criminal and fraudulent acts which materially
         damage the business of the Company. The Company shall indemnify
         Executive against and hold Executive harmless from any costs, expenses
         (including reasonable attorneys' fees as provided in this paragraph),
         liabilities, losses and exposures for Executive's services as an
         employee, officer and director of the Company (or any of AMPAM
         Companies or any successor) to the maximum extent permitted under
         applicable law. The indemnification required by this paragraph 14.
         shall be made by the Company by periodic payments promptly as and when
         bills are received or liabilities are incurred. The provisions of this
         paragraph shall survive the termination of this Agreement.

15.      Complete Agreement. This Agreement supersedes, and replaces in full,
         all representations, understandings and agreements (oral or written)
         between Executive and the Company or any of the AMPAM Companies or any
         of their officers, directors or representatives existing as of the
         Effective Date and covering the same subject matter as this Agreement.
         This written Agreement is the final, complete and exclusive statement
         and expression of the agreement between the Company and Executive and
         of all the terms of this Agreement, and it cannot be varied,
         contradicted or supplemented by evidence of any prior or
         contemporaneous oral or written agreements. This written Agreement may
         not be modified after the Effective Date except by a further writing
         signed by a duly authorized officer of the Company and Executive, and
         no term of this Agreement may be waived except by writing signed by the
         party waiving the benefit of such term. Without limiting the generality
         of the foregoing, either party's failure to insist on strict compliance
         with this Agreement shall not be deemed a waiver thereof.


                                      -17-

   18




16.      Notice. Whenever any notice is required hereunder, it shall be given in
         writing addressed as follows:

                  To the Company:  American Plumbing and Mechanical, Inc.
                                   1502 Augusta, Suite 425
                                   Houston, Texas 77057
                                   Attn:    Chairman of the Board of Directors

                  To Executive:    Robert A. Christianson
                                   5803 Long Court
                                   Austin, TX 78730

         Notice shall be deemed given and effective on the earlier of three days
         after the deposit in the U.S. mail of a writing addressed as above and
         sent first class mail, certified, return receipt requested, or when
         actually received. Either party may change the address for notice by
         notifying the other party of such change in accordance with this
         paragraph 16.

17.      Severability; Headings. If any portion of this Agreement is held
         invalid or inoperative, the other portions of this Agreement shall be
         deemed valid and operative and, so far as is reasonable and possible,
         effect shall be given to the intent manifested by the portion held
         invalid or inoperative. The paragraph headings herein are for reference
         purposes only and are not intended in any way to describe, interpret,
         define or limit the extent or intent of the Agreement or of any part
         hereof.

18.      Dispute Resolutions. Except with respect to injunctive relief as
         provided in paragraph 3b., neither party shall institute a proceeding
         in any court or administrative agency to resolve a dispute between the
         parties before that party has sought to resolve the dispute through
         direct negotiation with the other party. If the dispute is not resolved
         within two weeks after a demand for direct negotiation, the parties
         shall attempt to resolve the dispute through mediation. If the parties
         do not promptly agree on a mediator, the parties shall request the
         Association of Attorney Mediators in Harris County, Texas (or if the
         Company's principal offices are not in Harris County, a similar
         organization in the county in which the Company's principal offices are
         located) to appoint a mediator certified by the Supreme Court of Texas.
         If the mediator is unable to facilitate a settlement of the dispute
         within a reasonable period of time, as determined by the mediator, the
         mediator shall issue a written statement to the parties to that effect
         and any unresolved dispute or controversy arising under or in
         connection with this Agreement shall be settled exclusively by
         arbitration, conducted before a single arbitrator in the city in which
         the Company has its principal offices, in accordance with the
         Commercial Arbitration Rules of the American Arbitration Association
         then in effect. The arbitrator shall have the authority to order
         back-pay, severance compensation, vesting of options (or cash
         compensation in lieu of vesting of options), reimbursement of costs and
         expenses, including those incurred to enforce this Agreement, including
         reasonable attorneys' fees and interest thereon in the event the
         arbitrator determines that Executive was

                                      -18-

   19


         involuntarily terminated by the Company without Disability or Cause, as
         defined in paragraphs 4b. and 4c., respectively, or that the Company
         has otherwise materially breached this Agreement. A decision by the
         arbitrator shall be final and binding. Judgment may be entered on the
         arbitrator's award in any court having jurisdiction. The costs and
         expenses, including reasonable attorneys' fees, of the prevailing party
         in any dispute arising under this Agreement will be promptly paid by
         the other party.

19.      Governing Law. This Agreement shall in all respects be construed
         according to the laws of the State of Texas without regard to its
         conflicts of law provisions.

20.      Counterparts. This Agreement may be executed simultaneously in two or
         more Counterparts, each of which shall be deemed an original and all of
         which together shall constitute but one and the same instrument.

21.      Additional Provisions. The additional provisions set forth in Annex A
         and Annex B hereto shall apply.



                                      -19-

   20



         IN WITNESS WHEREOF, the parties hereto have executed this Agreement
effective for all purposes as of the Effective Date.

Date: July 16, 1999
      ---------------------
                                         AMERICAN PLUMBING AND MECHANICAL, INC.


                                          /s/ DAVID C. BAGGETT
                                         ---------------------------------------
                                         [Printed Name and Title]

Date: July 16, 1999
      ---------------------
                                         EXECUTIVE



                                          /s/ ROBERT A. CHRISTIANSON
                                         ---------------------------------------
                                              Robert A. Christianson
                                         ---------------------------------------
                                         [Printed Name]



                                      -20-

   21



                                     Annex A

I.       The Company shall grant to Executive a minimum of four weeks of
         vacation per calendar year.



                                      -21-

   22


                                     Annex B

Definitions. For purposes of this Annex B, "Christianson" shall be defined as
the combined operations of Christianson Enterprises, Inc., Christianson
Services, Inc. and GGR Leasing Corporation.

ADDITIONAL CONSIDERATION. In addition to the compensation provided in paragraphs
(a), (b) and (c) of paragraph 2 of the Agreement, AMPAM shall pay the Executive
such additional consideration (the "Additional Consideration") as shall be
determined in accordance with the following provisions (capitalized terms not
defined herein shall have the meaning ascribed to such term in the Acquisition
Agreement);

         (i)      Calculation of Additional Consideration.

                  (A)      If Christianson generates actual Net Income (as
                           defined below) in the calendar year ended December
                           31, 1999 in excess of Target Net Income (as defined
                           below) for that same period, the Executive shall be
                           entitled to receive Additional Consideration in
                           accordance with the following formula:

                                  A = 50% x (B - C) x 10.0 x 38.5%, where

                           "A" represents the amount of Additional Consideration
                           (provided that Additional Consideration shall be
                           limited to the maximum discussed below and will only
                           be paid in the event that "A" is a positive number);

                           "B" represents the amount of actual Net Income (as
                           defined below) generated by Christianson for the
                           calendar year ended December 31, 1999;

                           "C" represents Target Net Income (as defined below)
                           for the calendar year ended December 31, 1999.

                  (B)      Net Income of Christianson shall be Christianson's
                           net income determined in accordance with GAAP applied
                           on a basis consistent with that used in preparing the
                           Financial Statements (subject to audit by AMPAM's
                           independent public accountants at the election of
                           AMPAM), as adjusted by:

                           (i)      the exclusion of an allocation of
                                    amortization of goodwill associated with the
                                    consummation of the AMPAM Plan of
                                    Organization;

                           (ii)     the application of an 40% effective tax rate
                                    to the Company's pretax income;


                                      -22-

   23


                           (iii)    an allocation to Christianson of a charge
                                    for selling, general and administrative
                                    expense for the year ended December 31, 1999
                                    determined by multiplying $4,000,000 by the
                                    Applicable Percentage (as defined below).

                           (iv)     an allocation to Christianson of
                                    Christianson's allocable share of rebates
                                    and other purchasing benefits received by
                                    AMPAM from vendors and manufacturers of
                                    equipment, material and supplies such
                                    allocable share to be determined based upon
                                    the relative purchase of equipment,
                                    materials and supplies for the year ended
                                    December 31, 1999 by Christianson from such
                                    vendors and manufacturers in relation to the
                                    purchase of equipment, materials and
                                    supplies for the year ended December 31,
                                    1999 by all Founding Companies and other
                                    companies or businesses acquired by AMPAM
                                    after the Closing Date from such vendors and
                                    manufacturers, with the relative purchase
                                    price relationship to be based upon the
                                    criteria (such as quantity or dollar amount
                                    of purchases) that forms the basis for such
                                    rebates and other purchasing benefits
                                    received from such vendors and
                                    manufacturers; and

                           (v)      the adjustment of Christianson's insurance
                                    costs relating to general liability
                                    insurance coverage, property damage
                                    insurance coverage, workman's compensation
                                    insurance coverage, health insurance
                                    coverage and other insurance coverage to a
                                    level consistent with Christianson's
                                    insurance costs for the 12 month period
                                    ended June 30, 1998, taking into
                                    consideration changes in the size of the
                                    business of Christianson an the number of
                                    employees of the Company.

                                    If the allocation of selling, general and
                           administrative expenses discussed in (iii) exceeds
                           the allocation of rebated and other purchasing
                           benefits discussed in (iv), then there will be no
                           allocations of the items discussed in (iii) and (iv)
                           above for purposes of the Additional Consideration
                           calculation.

                  (C)      Target Net Income is defined as $6,733,357.

         (ii)     Maximum Additional Consideration. Notwithstanding the
                  foregoing formula, the maximum aggregate Additional
                  Consideration ("Maximum Additional Consideration") to be
                  received by the Executive is limited to 15% of the sum of the
                  Base Cash Amount, the principal amount of AMPAM Notes and the
                  value of the shares of AMPAM Stock paid to the Executive
                  pursuant to Section I.A. of the Annex I to the Acquisition
                  Agreement (prior to taking into account the adjustments


                                      -23-

   24


                  set forth in Sections I.B.2. and I.C.2.). For purposes of such
                  calculation, shares of AMPAM Stock received by the Executive
                  pursuant to Section I.A. of Annex I to the Acquisition
                  Agreement shall be given a value equal to the actual number of
                  shares of AMPAM Stock received by the Executive multiplied by
                  $13.00.

         (iii)    Form and Payment of Additional Consideration.

                  (A)      Form. The Additional Consideration shall be paid 50%
                           in cash and 50% in AMPAM Stock; provided, however,
                           that the Executive may elect to receive all or a
                           portion of such cash in the form of AMPAM Notes
                           attached to Annex I to the Acquisition Agreement as
                           Appendix A. The number of shares of AMPAM Stock shall
                           be derived by dividing 50% of the amount of
                           Additional Consideration to be paid in AMPAM Stock by
                           the average closing price on the New York Stock
                           Exchange (or other exchange or quotation system as
                           the AMPAM Stock may be traded at such time) for AMPAM
                           Stock for the five trading days before and the five
                           trading days after March 31, 2000; provided, however,
                           that if AMPAM Stock is not traded on an exchange or
                           quotation system, the price to be used in making the
                           foregoing calculation will be $13.00 per share.

                  (B)      Payment. Any Additional Consideration to be paid
                           shall be delivered by AMPAM to the Executive prior to
                           April 30, 2000. AMPAM's obligation to make any
                           payment of Additional Consideration will be subject
                           to the covenants and restrictions contained in
                           AMPAM's then existing private or public debt or
                           equity instruments.

         (iv)     Definitions.

                  "Applicable Percentage" shall mean the arithmetic average of
                  the following three percentages:

                  (a)      the percentage that the aggregate dollar amount of
                           the payroll expenses of Christianson for the year
                           ended December 31, 1999 represents in relation to the
                           aggregate dollar amount of the payroll expenses of
                           all Founding Companies for the year ended December
                           31, 1999;

                  (b)      the percentage that the aggregate dollar amount of
                           the operating revenue of Christianson for the year
                           ended December 31, 1999 represents in relation to the
                           aggregate dollar amount of the operating revenue of
                           all Founding Companies for the year ended December
                           31, 1999; and

                  (c)      the percentage that the average net book value of the
                           total assets of Christianson for the year ended
                           December 31, 1999 represents in relation to


                                      -24-


   25

                           the average net book value of the sum of the total
                           assets of all Founding Companies for the year ended
                           December 31, 1999. For purposes of this provision,
                           the "average" net book value of total assets for
                           Christianson and for all Founding Companies, as the
                           case may be, will be determined by dividing (I) the
                           total assets of Christianson or the summation of the
                           total assets of all Founding Companies, as the case
                           may be, for each calendar month during the year ended
                           December 31, 1999 by (ii) 12.




                                      -25-