AGREEMENT OF PURCHASE AND SALE OF STOCK

     This  AGREEMENT  OF  PURCHASE AND SALE OF STOCK, dated as of April 1, 1998
(the  "Agreement"), is made  and  entered  into  by  and  among  ONSITE  ENERGY
CORPORATION,  a  Delaware  corporation  ("Onsite")  and  Russell  William Royal
("Royal")  and  Keith  Aldrich  ("Aldrich"),  the sole shareholders of LIGHTING
TECHNOLOGY  SERVICES,  INC.,  a  California  corporation  ("LTS").   Royal  and
Aldrich, together, shall be referred to as the "LTS Shareholders."

                              WITNESSETH

     WHEREAS,  the  Board of Directors of Onsite  has  approved  and  deems  it
advisable  and  in  the  best  interest  of  its  stockholders  to  effect  the
acquisition of LTS by  Onsite  through  a  stock  purchase  under the terms and
subject to the conditions set forth herein; and

     WHEREAS, the LTS Shareholders own an aggregate of 40,000  shares of Series
1 (Voting) Common Stock (the "LTS Shares"), representing all of the outstanding
capital stock of LTS.

     NOW,  THEREFORE,  in  consideration  of  the  foregoing and the respective
representations, warranties, covenants, and agreements  set  forth  herein, the
parties hereto agree as follows:

I.   PURCHASE AND SALE OF THE LTS SHARES

     1.1  SALE  AND  TRANSFER  OF  LTS  SHARES.   Subject  to the terms and
conditions set forth in this Agreement, the LTS Shareholders will  transfer and
convey  the  LTS Shares to Onsite, and Onsite will acquire the LTS Shares  from
the LTS Shareholders, on the Closing Date (as defined in Section 1.5 below).

     1.2 INITIAL  CONSIDERATION.   As  initial  consideration  for  the LTS
Shares,  upon  the  Closing  of  this  Agreement, Onsite shall issue to the LTS
Shareholders a total of 690,000 shares of  Onsite's Class A Common Stock, $.001
par value (the "Onsite Shares"), pursuant to an exemption from the registration
requirements of the Securities Act of 1933,  as  amended (the "Securities Act")
under  Section  4(2)  of  the  Securities  Act and Rule  505  of  Regulation  D
thereunder, and $500,000 in cash (the "Cash Consideration").

     1.3 EARN-OUT PAYMENT.  Unless otherwise  agreed to by the parties as a
result of the audit of the financial statements of LTS to be conducted pursuant
to Section 4.5(g) hereof, as additional consideration  for  the  LTS Shares, if
the Net Income of LTS, as defined below, for the period from April  1,  1998 to
March   31,   1999,   exceeds  $278,414,  Onsite  shall  either,  in  its  sole
discretion,(a) pay to the  LTS Shareholders, in equal proportion, a cash amount
equal to the Income Eligible  for  Earn-Out  (as defined below), less $278,414,
multiplied  by  five  (5)  (the  "Cash  Amount"),  or  (b)  issue  to  the  LTS
Shareholders,  in equal proportion, an aggregate number  of  shares  of  Onsite


<PAGE2>


Class A Common Stock,  $.001 par value, equal to the Cash Amount divided by the
average closing price of  Onsite's  Class  A  Common  Stock for the twenty (20)
business days preceding March 31, 1999 (the "Earn-Out Shares").

           (a)  "Net Income" is defined as total operating revenues earned less
all  operating  expenses,  including  salaries  and  other  compensation,   and
excluding  income  taxes,  interest  paid to Onsite, Special Legal Expenses (as
defined in Section 1.3(h) below) and any  charges  for  Onsite's administrative
costs  on  behalf  of  LTS (including the agreed charge of $1,750  per  month),
unless otherwise agreed  by  the LTS Shareholders and Onsite, all in accordance
with GAAP, applied consistently  with  the  audit  to  be conducted pursuant to
Section 4.5(g) hereof, and subject to the approval of auditors  of Onsite.  The
parties  agree,  however,  that  with respect to any warranty and/or  bad  debt
reserves  applied  to  LTS's  net  revenues   by  Onsite's  auditors,  the  LTS
Shareholders  may  receive  additional  Earn-Out Shares  (or  Cash  Amount)  as
follows:

                (i)   Bad Debt Reserve.   Following  the 12-month period ending
March 31, 2000, the parties shall review the collection  of  any  bad debts for
which reserves had been created that reduced the Net Income of LTS  for the 12-
month  period  ending March 31, 1999.  If any such debt was actually collected,
the LTS Shareholders  shall  be  entitled  to  the  additional Earn-Out Payment
(subject to adjustment for any stock split, stock dividend, reverse stock split
or similar transaction after March 31, 1999) that would  have  been paid if the
bad debt reserve had not included that collected debt, which shall  be  paid no
later than June 15, 2000.

                (ii)  Warranty  Reserve.  For any warranty reserve that reduced
the  Net Income of LTS for the 12-month  period  ending  March  31,  1999,  the
parties  shall  review  the  actual  expenses associated with warranty services
during each subsequent year for the duration  of  each warranty covered by such
reserve.   If  any  such warranty expenses prove to be  less  than  the  amount
reserved for that warranty,  the  LTS  Shareholders  shall  be  entitled to the
additional Earn-Out Payment (subject to adjustment for any stock  split,  stock
dividend, reverse stock split or similar transaction after March 31, 1999) that
would  have  been  paid  if the warranty reserve had only reflected such actual
warranty expenses, which shall  be  paid no later than 75 days after the end of
each such year.

           (b)  "Income Eligible for  Earn-Out" is defined as the Net Income of
LTS (as defined above), less any Gross  Profit  Margin  attributed  to "Onsite-
initiated Projects," as defined below, in excess of $460,000.

           (c)  "Gross  Profit  Margin"  is defined as gross revenues less  all
direct  material,  direct  labor, direct sales  tax  and  direct  miscellaneous
expenses, unless otherwise agreed by the LTS Shareholders and Onsite.

           (d)  "Onsite-initiated  Project" is defined as any project for which
Onsite  has  initially  identified  the   customer   and   has   taken  primary
responsibility in securing an executed contract with the customer.   Exhibit  A
sets  forth  the  present Onsite-initiated Projects, and is subject to periodic
updates by the parties.



<PAGE3>


           (e)  Notwithstanding  the  calculation  above, the maximum number of
Earn-Out Shares which may be issued is 3,310,000, subject to adjustment for any
stock  split,  stock  dividend,  reverse  stock split or  similar  transaction.
Similarly, the maximum Cash Amount shall not  exceed  the average closing price
of  Onsite's Class A Common Stock for the twenty (20) business  days  preceding
March 31, 1999 multiplied by 3,310,000 (subject to similar adjustments).

           (f)  The  payment  of  the  Cash  Amount or issuance of the Earn-Out
Shares pursuant to this Section 1.3 is a one-time incentive based on the income
and revenues of LTS for the period from April 1, 1998 to March 31, 1999 only.

           (g)  The payment of the Cash Amount  or  issuance  of  the  Earn-Out
Shares, if any, shall be completed within 30 days of the completion of a review
or audit by Onsite's auditors, but not later than June 15, 1999.

           (h)  "Special  Legal Expenses" is defined as any liabilities,  costs
and expenses (including attorneys'  fees)  incurred by LTS after March 31, 1998
as a result of or relating to the litigation referred to in Section 2.10 of the
Disclosure  Schedule  or  in  connection  with  the   negotiation,  review  and
preparation of this Agreement and the exhibits hereto.   Although  the  Special
Legal  Expenses  will  not  be  deducted  to  determine  Net  Income,  the  LTS
Shareholders  will  be  responsible  to  reimburse  LTS  for  any Special Legal
Expenses  paid  by  LTS  as  follows.   With respect to any such Special  Legal
Expenses paid by LTS before the earlier of  June  15, 1999 or the date the Cash
Amount  is  paid or the Earn-Out Shares are issued (the  "Payment  Date"),  the
total amount  of  such  Special  Legal  Expenses  paid by LTS (without interest
thereon)  shall  be  deducted  from the amount of the Cash  Amount  that  would
otherwise apply for purposes of  this  Section  1.3.  If the amount of the Cash
Amount is less than the total amount of such Special  Legal  Expenses, each LTS
Shareholder  will  pay to LTS on the Payment Date an amount equal  to  one-half
( 1/2 ) of the shortfall,  by  a  cash payment and/or by surrendering shares of
Onsite Class A Common Stock valued  at  their  average  closing  price  for the
twenty  (20)  business  days  preceding that date.  With respect to any Special
Legal Expenses paid by LTS after  the Payment Date, each LTS Shareholder agrees
to reimburse LTS on demand for one-half  (  1/2  )  of  the total amounts paid,
provided that LTS shall not agree to make any such payment  without the written
consents  of  the  LTS  Shareholders, which consents shall not be  unreasonably
refused.  On the Payment  Date,  each  LTS  Shareholder  shall grant to LTS, as
collateral security for such LTS Shareholder's obligations  under the preceding
sentence, a security interest in a number of shares of Onsite  Class  A  Common
Stock equal to one half ( 1/2 ) of:  (a) the dollar amount of any reserve  then
contained on Onsite's balance sheet with respect to any litigation referred  to
in Section 2.10, (b) divided by the average closing price of the Onsite Class A
Common  Stock for the twenty (20) business days preceding that date.  Quarterly
thereafter  (on  the  same  date  of each successive third calendar month), the
number  of  shares subject to such security  interest  shall  be  increased  or
decreased, as appropriate, to equal one-half ( 1/2 ) of:  (c) the dollar amount
of any reserve  then  contained  on  Onsite's balance sheet with respect to any
litigation referred to in Section 2.10,  (d)  divided  by  the  average closing
price  of  the  Onsite  Class A Common Stock for the twenty (20) business  days


<PAGE4>


preceding  that  date.  The  LTS  Shareholders  agree  to  sign  any  financing
statements or other documentation reasonably requested by Onsite to evidence or
perfect such security interests.

     1.4   CONDITIONS  PRECEDENT  TO  CLOSING.   All obligations of the parties
under this Agreement are subject to the fulfillment, prior to or at the Closing
Date,  of  all  conditions herein set forth, including,  but  not  limited  to,
receipt by the appropriate party of all deliveries required by Section 1.6, and
fulfillment, prior to the Closing Date, of each of the following conditions:

           (a)  Onsite  shall  have received the first draw due to it under the
Performance Based Energy Savings Agreement with Unified School District #500 of
Wyandotte County, Kansas executed on March 31, 1998.

           (b)  LTS and Energy Pacific shall have executed an agreement (with a
value of approximately $2,582,000) for the implementation by LTS of, or for the
performance of work by LTS on, an  energy  efficiency  savings  project for the
Santa Ana Unified School District.

     1.5   CLOSING.  The closing of the stock purchase and sale contemplated by
this Agreement (the "Closing") shall take place at 3:00 p.m., California  time,
on  June  3, 1998 (the "Closing Date"), simultaneously at the offices of Bartel
Eng Linn &  Schroder,  300  Capitol  Mall,  Suite 1100, Sacramento, California,
Onsite  Energy  Corporation, 701 Palomar Airport  Road,  Suite  200,  Carlsbad,
California, and Clay,  Clayton  &  Jensen, 610 Newport Center Drive, Suite 700,
Newport Beach, California, unless another date or place is agreed to in writing
by the parties hereto.

     1.6   DELIVERIES. The following  deliveries  shall  be made on the Closing
Date:

           (a)  DELIVERIES BY ONSITE TO ROYAL: Onsite shall  deliver  to  Royal
the following:

                (i)   Instructions  to  Onsite's  transfer agent to issue stock
certificates representing 345,000 Onsite Shares as set forth in Section 1.2;

                (ii)  $250,000  as  set  forth in Section  1.2  in  immediately
available funds by wire transfer in accordance  with  written instructions from
Royal or by certified or cashier's check or checks, payable  to  the  order  of
Royal, or by any other method acceptable to Royal and Onsite;

                (iii) a certificate, executed by Onsite, certifying that all of
the  representations  and  warranties  set  forth  in  Article III are true and
correct in all material respects, as of the Closing Date,  and  that all of the
conditions of this Agreement applicable to the Closing Date have been satisfied
or waived.

           (b)  DELIVERIES  BY  ONSITE  TO  ALDRICH:  Onsite  shall deliver  to
Aldrich the following:



<PAGE5>


                (i)   Instructions  to Onsite's transfer agent to  issue  stock
certificates representing 345,000 Onsite Shares as set forth in Section 1.2;

                (ii)  $250,000 as set  forth  in  Section  1.2  in  immediately
available  funds by wire transfer in accordance with written instructions  from
Aldrich or by  certified  or cashier's check or checks, payable to the order of
Aldrich, or by any other method acceptable to Aldrich and Onsite;

                (iii) a certificate, executed by Onsite, certifying that all of
the representations and warranties  set  forth  in  Article  III  are  true and
correct  in all material respects, as of the Closing Date, and that all of  the
conditions of this Agreement applicable to the Closing Date have been satisfied
or waived.

           (c)  DELIVERIES  BY  ROYAL  TO  ONSITE:   On the Closing Date, Royal
shall deliver to Onsite the following:

                (i)   the   stock   certificates   for   20,000   LTS   Shares,
representing all of his equity interest in LTS;

                (ii)  a certificate, executed by Royal, certifying  that all of
the representations and warranties set forth in Article II are true and correct
in  all  material  respects,  as  of  the  Closing  Date,  and  that all of the
conditions of this Agreement applicable to the Closing Date have been satisfied
or waived.

                (iii) a copy of the executed Energy Pacific agreement  required
by Section 1.4(b) above.

           (d)  DELIVERIES  BY ALDRICH TO ONSITE:  On the Closing Date, Aldrich
shall deliver to Onsite the following:

                (i)   the   stock   certificates   for   20,000   LTS   Shares,
representing all of his equity interest in LTS;

                (ii)  a certificate,  executed  by Aldrich, certifying that all
of the representations and warranties set forth in  Article  II  are  true  and
correct  in  all material respects, as of the Closing Date, and that all of the
conditions of this Agreement applicable to the Closing Date have been satisfied
or waived.

II.  REPRESENTATIONS AND WARRANTIES OF THE LTS SHAREHOLDERS

     Except as  otherwise provided, as of the date hereof, the LTS Shareholders
represent and warrant to Onsite as follows:

     2.1   FULL KNOWLEDGE  OF LTS BUSINESS.  As the sole shareholders, officers
and  directors  of  LTS,  the  LTS   Shareholders   are   competent   to   make
representations   and   warranties   concerning   the  corporate  organization,
capitalization, authorization, financial affairs and other representations that
follow with respect to LTS.



<PAGE6>


     2.2   ORGANIZATION OF LTS.

           (a)  LTS  is a corporation duly organized,  validly  existing,  duly
qualified or licensed  to  do  business  and in good standing under the laws of
California  and  in  each jurisdiction in which  the  nature  of  the  business
conducted by it makes  such  qualification  or licensing necessary, and has all
requisite corporate or other power and authority and all necessary governmental
approvals  to  own,  lease, and operate its properties  and  to  carry  on  its
business as now being  conducted,  except where the failure to be so organized,
existing,  and  in  good  standing  or  to  have  such  power,  authority,  and
governmental approvals would not have a material adverse effect on LTS. LTS has
no active or inactive subsidiaries.

           (b)  As used in this Agreement,  any reference to any event, change,
or effect having a material adverse effect on or with respect to any entity (or
group  of  entities  taken as a whole) means such  event,  change,  or  effect,
individually or in the  aggregate  with such other events, changes, or effects,
which is materially adverse to the financial  condition, businesses, results of
operations, assets, liabilities, or properties of such entity (or, if used with
respect thereto, of such group of entities taken as a whole).

     2.3   CAPITALIZATION OF LTS.

           (a)  The authorized capital stock of  LTS  consists of 40,000 shares
of  LTS  Series 1 (Voting) Common Stock and 20,000 shares  of  Series  2  (Non-
Voting) Common Stock.  As of the date hereof, (i) 40,000 shares of LTS Series 1
(Voting) Common Stock were issued and outstanding, (ii) no shares of LTS Series
2 (Non-Voting)  Common Stock were issued and outstanding and (iii) no shares of
LTS Common Stock  were reserved for issuance pursuant to employee benefit plans
of LTS.  All of the  issued  and  outstanding  shares  of  LTS Common Stock are
validly issued, fully paid, and nonassessable.

           (b)  Except  as  disclosed  in  this Section 2.3, (i)  there  is  no
outstanding right, subscription, warrant, call,  option,  or other agreement or
arrangement of any kind (collectively, "Rights") to purchase  or  otherwise  to
receive  from  LTS  any  of the outstanding authorized but unissued or treasury
shares of the capital stock  or  any  other  security  of LTS, (ii) there is no
outstanding  security  of  any kind convertible into or exchangeable  for  such
capital stock, and (iii) there  is  no  voting  trust  or  other  agreement  or
understanding  to  which  LTS or any of its shareholders is a party or is bound
with respect to the voting of the capital stock of LTS.

     2.4   TITLE TO SHARES.   The LTS Shareholders are the owners, beneficially
and  of  record,  of  all  of the LTS  Shares,  which  constitute  all  of  the
outstanding shares of LTS, free  and clear of all liens, encumbrances, security
agreements,  equities, options, claims,  charges  and  restrictions.   The  LTS
Shareholders have  full  power  to  transfer  the  LTS Shares to Onsite without
obtaining the consent or approval of any other person,  except  spousal consent
under California community property laws, or governmental authority.



<PAGE7>



     2.5   CORPORATE AUTHORIZATION; VALIDITY OF AGREEMENT; LTS ACTION.  LTS has
full  corporate  power  and  authority  to  execute  and deliver any agreements
relating to subject matter hereof (the "Ancillary Agreements") to which it is a
party.

     2.6   FINANCIAL  STATEMENTS.  The LTS Shareholders  have  heretofore  made
available to Onsite true  and  complete  copies  of  all consolidated financial
statements prepared by or on behalf of LTS from January  1,  1996,  to December
31,  1997.   Such  consolidated  financial  statements (collectively, the  "LTS
Financial Statements") have been prepared from, and are in accordance with, the
books and records of LTS, and, in all material respects, comply with applicable
accounting requirements, have been prepared in  accordance  with  United States
generally accepted accounting principles ("GAAP") applied on a consistent basis
during the periods involved (except as may be indicated in the notes  thereto),
and  fairly  present  the  consolidated financial position and the consolidated
results of operations and cash flows of LTS, as of the dates thereof or for the
periods  presented  therein.    Although   the  LTS  Shareholders  believe  the
disclosures in such financial statements are accurate in all material respects,
the financial statements have only been "reviewed," not "audited" by an outside
Certified Public Accountant and certain year-end  adjustments,  information and
disclosures  normally  included in financial statements prepared in  accordance
with GAAP have been condensed  or  omitted.  LTS maintains a system of internal
accounting  controls  sufficient  to provide  reasonable  assurances  that  (i)
transactions are executed in accordance  with  management's general or specific
authorization;  (ii)  transactions  are  recorded  as   necessary   to   permit
preparation  of  financial  statements  in conformity with GAAP and to maintain
accountability  of  assets;  (iii)  access  to  assets  is  permitted  only  in
accordance with management's general or specific  authorization;  and  (iv) the
recorded  accountability  for  assets  is  compared  with  existing  assets  at
reasonable  intervals  and  appropriate  action  is  taken  with respect to any
differences.

     2.7   ABSENCE  OF  CERTAIN  CHANGES.   Except to the extent  disclosed  in
Section 2.7 of the Disclosure Schedule, attached  to  this Agreement as Exhibit
B1,  since  January  1, 1998, LTS has conducted its businesses  and  operations
consistent with past practice  only  in  the ordinary and usual course and from
January 1, 1998 through the date of this Agreement,  there has not occurred (i)
any events, changes, or effects (including the incurrence of any liabilities of
any nature, whether or not accrued, contingent, or otherwise)  having, or which
would  be  reasonably  likely  to  have,  individually  or in the aggregate,  a
material adverse effect on LTS; (ii) any declaration, setting aside, or payment
of  any  dividend or other distribution (whether in cash, stock,  or  property)
with respect  to  the  equity  interests  of LTS; or (iii) any change by LTS in
accounting principles or methods, except insofar as may be required by a change
in GAAP.

     2.8   NO  UNDISCLOSED  LIABILITIES.  Except  (a)  as  reflected  on  LTS's
balance sheet for the fiscal  year  ending December 31, 1997, (b) to the extent
disclosed in Section 2.8 of the Disclosure  Schedule,  and  (c) for liabilities
and  obligations incurred in the ordinary course of business,  consistent  with
past practice  and  not in excess of $100,000 in the aggregate since January 1,
1998, LTS has not incurred  any  liabilities  or  obligations  of  any  nature,
whether  or  not  accrued,  contingent  or  otherwise,  that  have, or would be


<PAGE8>


reasonably  likely  to  have,  a  material  adverse effect on LTS or  would  be
required to be reflected or reserved against on a consolidated balance sheet of
LTS (including the notes thereto) prepared in  accordance  with GAAP as applied
in preparing the balance sheet of LTS as of December 31, 1997.

     2.9   EMPLOYEE BENEFIT PLANS; ERISA.

           (a)  Section  2.9  of the Disclosure Schedule contains  a  true  and
complete  list of each bonus, deferred  compensation,  incentive  compensation,
stock purchase,  stock  option, severance, or termination pay, hospitalization,
or other medical, life, or other insurance, supplemental unemployment benefits,
profit-sharing,  pension,   or   retirement   plan,   program,   agreement,  or
arrangement,  and  each  other  employee  benefit  plan, program, agreement  or
arrangement,  sponsored,  maintained,  or  contributed to  or  required  to  be
contributed to by LTS or by any trade or business,  whether or not incorporated
(an  "ERISA  Affiliate"),  that together with LTS would  be  deemed  a  "single
employer" within the meaning  of  Section 401 of the Employee Retirement Income
Security Act of 1974, as amended ("ERISA"),  for the benefit of any employee or
terminated employee of LTS or any ERISA Affiliate (the "Plans").

           (b)  With  respect to each Plan, LTS  has  heretofore  delivered  to
Onsite true and complete copies of each of the following documents:  (i) a copy
thereof; (ii) a copy of the most recent annual report; (iii) a copy of the most
recent Summary Plan Description required under ERISA with respect thereto; (iv)
if the Plan is funded through  a  trust  or  any third party funding vehicle, a
copy  of  the  trust  or  other  funding  agreement and  the  latest  financial
statements thereof; and (v) the most recent  determination letter received from
the  Internal Revenue Service with respect to each  Plan  intended  to  qualify
under Section 401 of the Code.

           (c)  LTS  has  not maintained, sponsored, or contributed to any plan
subject to Title IV of ERISA within the past six years.

           (d)  There are no  pending,  threatened, or, to the knowledge of the
LTS Shareholders, anticipated claims by or  on  behalf  of  any  Plan,  by  any
employee or beneficiary covered under any such Plan, or otherwise involving any
such Plan (other than routine claims for benefits).

     2.10  LITIGATION;  COMPLIANCE WITH LAW.  Except to the extent disclosed in
Sections 2.10 and 2.12 of the Disclosure Schedule:

           (a)  There is  no  suit,  claim, action, proceeding or investigation
pending or, to the best knowledge of the  LTS  Shareholders, threatened against
or affecting, LTS; and

           (b)  LTS  has  complied  in  a timely manner  and  in  all  material
respects  with  all  laws,  statutes,  regulations,   rules,   ordinances,  and
judgments,   decrees,   orders,  writs,  and  injunctions,  of  any  court   or
governmental entity relating  to  any of the property owned, leased, or used by
it,  or  applicable to its business,  including,  but  not  limited  to,  equal



<PAGE9>


employment   opportunity,   discrimination,  occupational  safety  and  health,
environmental, interstate commerce, and antitrust laws.

     2.11  NO DEFAULT.  The business  of  LTS is not being conducted in default
or in violation of any term, condition, or  provision  of  (i)  its  respective
Articles  of Incorporation or Bylaws or similar organizational documents,  (ii)
any LTS Agreement  or (iii) any federal, state, local, or foreign law, statute,
regulation,  rule,  ordinance,   judgment,  decree,  order,  writ,  injunction,
concession,  grant,  franchise,  permit,   or  license  or  other  governmental
authorization  or  approval applicable to LTS,  excluding  from  the  foregoing
clauses (ii) and (iii),  defaults or violations that would not, individually or
in the aggregate, have a material  adverse  effect on LTS, or materially impair
the ability of the LTS Shareholders to sell the LTS Shares.

     2.12  TAXES.

           (a)  Except as set forth in Section 2.12 of the Disclosure Schedule:

                (i)   LTS has (x) duly filed  (or  there  has been filed on its
behalf)  with  the appropriate federal, state, local, and foreign  Governmental
Entitles all Tax Returns (as hereinafter defined) required to be filed by it on
or prior to the  date  hereof,  and  such  Tax  Returns  are true, correct, and
complete in all material respects, and (y) duly paid in full  or made provision
in accordance with GAAP (or there has been paid or provision has  been  made on
its  behalf)  for  the  payment  of  all Taxes (as hereinafter defined) for all
periods ending on or before the Closing Date;

                (ii)  LTS has made provision  for all Taxes payable (x) for any
periods that end before the Closing Date for which no Tax Returns have yet been
filed and (y) for all periods that begin before  the Closing Date and end after
the Closing Date to the extent that such Taxes are attributable to a portion of
any such periods ending on the Closing Date;

                (iii)  There are no liens for Taxes upon any property or assets
of LTS, except for liens for Taxes not yet due;

                (iv)  LTS  has  not  made  any  change in  accounting  methods,
received a ruling from any taxing authority, or signed  an  agreement likely to
have a material adverse effect on LTS;

                (v)  LTS has complied in all respects with all applicable laws,
rules,  and  regulations  relating  to  the  payment and withholding  of  Taxes
(including, without limitation, withholding of  Taxes pursuant to Sections 1441
and 1442 of the Code or similar provisions under  any  foreign  laws)  and has,
within the time and the manner prescribed by law, withheld and paid over to the
proper  federal,  state,  local,  and foreign Governmental Entities all amounts
required to be so withheld and paid over under applicable laws;



<PAGE10>


                (vi)  No deficiency  for any taxes has been proposed, asserted,
or assessed against LTS which has not been resolved and paid in full;

                (vii)  No federal, state,  local,  or foreign auditors or other
administrative  proceedings  or court proceedings are  presently  pending  with
regard to any Taxes or Tax Returns  of  LTS, and LTS has not received a written
notice of any pending audits or proceedings;

                (viii)  The federal income  Tax  Returns  of  LTS  has not been
audited  by  the  Internal  Revenue  Service  or  any  state, local, or foreign
Governmental  Entity  (or  the  applicable  statutes  of  limitation   for  the
assessment  of  federal  income  Taxes  for  such periods have expired) for any
period through and including December 31, 1997;

                (ix)  There are no outstanding  requests, agreements, consents,
or  waivers  to extend the statutory period of limitations  applicable  to  the
assessment of  any  Taxes or deficiencies against LTS, and no power of attorney
granted by LTS with respect to any Taxes is currently in force;

                (x)   LTS  is  not  a  party to any agreement providing for the
allocation or sharing of Taxes; and

                (xi)  LTS is not required to be, nor has been, included in (and
has not, and will not, consent to be included  in)  a  consolidated,  combined,
unitary,  or  affiliated  Tax  Return  for any period under any federal, state,
local, or foreign law, and LTS is not nor  will be subject to liability for any
taxes  of any other person, including, without  limitation,  liability  arising
from the  application  of  Section  1.1502-6  of  the U.S. Treasury regulations
promulgated pursuant to Section 1502 of the Code or  any analogous provision of
any state, local or foreign law.

           (b)  "Taxes" (including, with correlative meaning,  the  term "Tax")
shall  mean  any  and  all  taxes,  charges, fees, levies or other assessments,
including, without limitation, income, gross receipts, excise, real or personal
property, sales, withholding, social  security,  railroad  retirement, railroad
unemployment,  occupation,  use,  service,  service  use, license,  net  worth,
payroll, franchise, transfer and recording taxes, real property transfer taxes,
fees  and  charges,  imposed  by  the Internal Revenue Service  or  any  taxing
authority  (whether  domestic or foreign  including,  without  limitation,  any
state, county, local or  foreign government or any subdivision or taxing agency
thereof  (including  a  United  States  possession)),  whether  computed  on  a
separate, consolidated, unitary,  combined  or  any  other basis; and such term
shall   include   any   interest,  fines,  penalties,  or  additional   amounts
attributable to, or imposed  upon,  or with respect to, any such amounts.  "Tax
Return"  shall  mean  any  report,  return,   document,  declaration  or  other
information  or filing required to be filed with  or  supplied  to  any  taxing
authority  or  jurisdiction  (foreign  or  domestic)  with  respect  to  Taxes,
including, without  limitation, information returns, any documents with respect
to  or  accompanying payments  of  estimated  Taxes,  or  with  respect  to  or
accompanying  requests  for  the  extension  of  time in which to file any such
report, return, document, declaration or other information.



<PAGE11>


     2.13  CONTRACTS.  Each LTS Agreement is valid,  binding,  enforceable, and
in  full  force  and  effect,  except  where  failure  to  be  valid,  binding,
enforceable,  and  in  full  force and effect would not have a material adverse
effect on LTS, and there are no  defaults  thereunder  by  LTS  or, to the best
knowledge  of  the LTS Shareholders, by any other party, except those  defaults
that would not have  a  material  adverse  effect  on LTS.  Section 2.13 of the
Disclosure  Schedule  sets  forth  a true and complete list  of  all  (i)  non-
competition agreements imposing restrictions  on  the ability of LTS to conduct
business in any jurisdiction or territory, (ii) agreements  of  LTS relating to
indebtedness  for  borrowed  money  (whether  incurred, assumed, guaranteed  or
secured by any asset), except any such agreement  with an aggregate outstanding
principal  amount  not exceeding $25,000, (iii) leases  or  subleases  of  real
property to which LTS  is  a  party,  (iv) partnership, joint venture, or other
similar  agreements or arrangements to which  LTS  is  a  party,  (v)  material
agreements  to  which  LTS  is  a  party providing for agency, dealer, or sales
representation arrangements, (vi) agreements  to  which  LTS  is  a party which
contain  provisions  relating  to  "change  of  control"  situations or similar
provisions,  (vii)  material  project  or  customer  agreements,   and   (viii)
agreements of LTS with or for the benefit of any affiliate of LTS.

     2.14    TITLE  TO  PROPERTY.   Section  2.14  of  the  Disclosure Schedule
accurately identifies all real and tangible personal property owned by LTS (the
"LTS  Property").  LTS has good and marketable title to LTS Property  owned  by
it, free  and clear of all liens, options, mortgages, easements, rights-of-way,
or other encumbrances  and  restrictions  of  any  nature whatsoever, except as
described in Section 2.14 of the Disclosure Schedule  and  those  that  do  not
adversely affect materially the value of LTS Property.

     2.15   ENVIRONMENTAL MATTERS.

            (a)    Except  as  set  forth  in  Section 2.15(a) of the Disclosure
Schedule  and  except  for  matters which would not,  individually  or  in  the
aggregate, be reasonably expected  to  result  in  a material adverse effect on
LTS: (i) LTS is and has been in compliance with, and  there  are no outstanding
allegations  by any person or entity that LTS has not been in compliance  with,
all applicable  laws,  rules,  regulations,  common  law,  ordinances, decrees,
orders,  or  other binding legal requirements relating to pollution  (including
the treatment,  storage, and disposal of wastes and the remediation of releases
and threatened releases of materials), the preservation of the environment, and
the exposure of materials  in  the  environment  or  work place ("Environmental
Laws"), and (ii) LTS currently holds all permits, licenses,  registrations, and
other governmental authorizations (including exemptions, waivers, and the like)
and financial assurance required under Environmental Laws for  LTS  to  operate
its business as currently conducted.

           (b)    Except  as  set  forth  in  Section 2.15(b) of the Disclosure
Schedule, to the knowledge of LTS, (i) there is  no friable asbestos-containing
material in or on any real property currently or previously  owned,  leased, or
operated by LTS, and (ii) there are and have been no underground storage  tanks
(whether  or  not  required  to be registered under any applicable law), dumps,


<PAGE12>


landfills,  lagoons,  surface  impoundments,  injection  wells  or  other  land
disposal units in or on any property  currently or previously owned, leased, or
operated by LTS.

           (c)    Except as set forth on  Section  2.15(c)  of  the  Disclosure
Schedule, (i) LTS has  not  received  (x)  any  written  communication from any
person stating or alleging that it may be a potentially responsible party under
any Environmental Law (including, without limitation, the Federal Comprehensive
Environmental Response, Compensation, and Liability Act of  1980,  as  amended)
with  respect to any actual or alleged environmental contamination, or (y)  any
request  for  information  under  any  Environmental  Law from any Governmental
Entity   with   respect   to  any  actual  or  alleged  material  environmental
contamination; and (ii) neither  LTS  nor any Governmental Entity is conducting
and has conducted (or, to the knowledge of the LTS Shareholders, is threatening
to conduct) any environmental remediation  or  investigation which could result
in a material liability under any Environmental Law.

     2.16  PURCHASE FOR OWN ACCOUNT.  The LTS Shareholders  are  acquiring  the
Onsite  Shares  and  Earn-Out  Shares  for  their  own accounts, for investment
purposes  and  not  for  resale  or  with  a  view to any distribution,  or  in
connection with any distribution thereof.  The LTS Shareholders are able to (i)
bear the economic risk of the investment in Onsite, (ii) hold the Onsite Shares
and  Earn-Out  Shares for an indefinite period of  time,  and  (iii)  afford  a
complete loss of the investment.

     2.17  INVESTMENT  EXPERIENCE.   The  LTS  Shareholders  have the requisite
knowledge   and   experience  in  financial  and  business  matters,  including
investments of this  type,  to be capable of evaluating the merits and risks of
an  investment in the Onsite Shares  and  Earn-Out  Shares  and  of  making  an
informed investment decision with respect thereto.

     2.18  RECEIPT  OF  INFORMATION.   The LTS Shareholders have received, read
carefully, considered and fully understood  the  Onsite  SEC Documents, as that
term is defined in Section 3.5 hereof, provided and have received  from  Onsite
all  of the information concerning Onsite that they consider to be material  in
making the investment decision, which information has been requested by the LTS
Shareholders  if not already furnished by Onsite.  The LTS Shareholders (and/or
their purchaser  representatives, if any) have had full access to the books and
records of Onsite  and  to  its  officers,  directors  and  accountants for the
purpose  of  obtaining and verifying such information and the LTS  Shareholders
have had an opportunity  to ask questions and receive answers from the officers
of Onsite regarding the terms  and  conditions of this transaction and Onsite's
business and financial condition.

     Except  as  set  forth  in  the  Onsite   SEC   Documents   provided,   no
representations  or  warranties,  oral  or  otherwise,  have  been made to you,
including  without  limitation,  any  representations  concerning  the   future
prospects  of  Onsite, by Onsite or any agent, employee or affiliate of Onsite,
or any other person  whether  or  not  associated with this transaction, and in
entering into this transaction the LTS Shareholders  are  not  relying upon any
information,  other  than  that  contained in the documents provided,  and  the
results  of their own independent investigation.   The  LTS  Shareholders  have


<PAGE13>


obtained sufficient  information  to  evaluate  the  merits  and  risks  of the
investment and to make an informed investment decision.

     2.19  RESTRICTED   SECURITIES.    The   LTS  Shareholders  understand  and
acknowledge that the Onsite Shares and the Earn-Out  Shares  they are receiving
hereunder are "restricted securities" under federal and state  securities  laws
insofar  as  they have not been registered under the 1933 Act or the securities
laws of any other  jurisdiction,  that  they  may  not be resold or transferred
without  compliance with the registration or qualification  provisions  of  the
1933 Act or  applicable federal and state securities laws of any state or other
jurisdiction or  an opinion of counsel that an exemption from such registration
and qualification requirements is available.  The LTS Shareholders are familiar
with SEC Rule 144  as  presently  in  effect and the resale limitations imposed
thereby and by the 1933 Act.

     2.20  AGREEMENT  WILL  NOT  CAUSE  BREACH.    The   consummation   of  the
transactions  contemplated  by  this Agreement will not result in either (i)  a
default or event that, with notice,  lapse of time or both, would be a default,
breach or violation of any lease, license,  promissory  note, conditional sales
contract, commitment, indenture, mortgage, deed of trust,  or  other agreement,
instrument or arrangement to which the LTS Shareholders or LTS is a party or by
which  any  of them or the property of any of them is bound, or (ii)  an  event
that would permit  any  party  to  terminate any agreement or to accelerate the
maturity of any indebtedness or other obligation of LTS.

III. REPRESENTATIONS AND WARRANTIES OF ONSITE

     Except as otherwise provided, as of the date hereof, Onsite represents and
warrants to the LTS Shareholders as follows:

     3.1    ORGANIZATION.  Onsite is  a  corporation  duly  organized,  validly
existing, duly  qualified or licensed to do business and in good standing under
the laws of the jurisdiction  of  its incorporation and in each jurisdiction in
which the nature of the business conducted  by  it  makes such qualification or
licensing  necessary,  and  has  all requisite corporate  or  other  power  and
authority and all necessary governmental  approvals  to own, lease, and operate
its  properties  and  to carry on its business as now being  conducted,  except
where the failure to be so organized, existing, and in good standing or to have
such power, authority,  and  governmental  approvals  would not have a material
adverse effect on Onsite and its subsidiaries, taken as a whole.

     3.2   CAPITALIZATION. The authorized capital stock  of  Onsite consists of
24,000,000  shares of Onsite Common Stock, consisting of 23,999,000  shares  of
Class A Common Stock, $.001 par value per share (the "Common Stock"), and 1,000
shares of Class  B  Common  Stock,  par  value  $.001  per  share (the "Class B
Common"), and 1,000,000 shares of preferred stock, par value  $.001  per  share
(the  "Onsite  Preferred Stock").  As of the date hereof, (i) 15,512,372 shares
of Onsite Common  Stock  were issued and outstanding, (ii) no shares of Class B
Common  were  issued  and  outstanding,   (iii)  208,205  shares  of  Series  C
Convertible Preferred Stock were issued and  outstanding  (iv) options ("Onsite
Options") to acquire approximately 3,200,000 shares of Onsite Common Stock were


<PAGE14>


outstanding under the employee stock option plans of Onsite,  and (v) 3,300,000
shares  of  Onsite  Common  Stock  were reserved for issuance pursuant  to  the
employee stock option plans of Onsite  and  all other employee benefit plans of
Onsite.  All of the issued and outstanding shares  of  Onsite  Common Stock and
Preferred Stock are validly issued, fully paid and nonassessable.

     3.3   CORPORATE AUTHORIZATION; VALIDITY OF AGREEMENT; ONSITE ACTION.

           (a)   Onsite has full corporate power and authority to  execute  and
deliver this Agreement  and to consummate the transactions contemplated hereby.
The execution, delivery,  and  performance  by Onsite of this Agreement and the
consummation by it of the transactions contemplated  hereby  have been duly and
validly authorized by Onsite's Board of Directors and no other corporate action
on  the  part  of  Onsite  or  its  shareholders is necessary to authorize  the
execution and delivery by Onsite of this  Agreement  and the consummation by it
of the transactions contemplated hereby.  This Agreement has been duly executed
and  delivered  by  Onsite  and constitutes a valid and binding  obligation  of
Onsite enforceable against Onsite in accordance with its terms, except that (i)
such enforcement may be subject  to applicable bankruptcy, insolvency, or other
similar  laws,  now  or  hereafter  in   effect,  affecting  creditors'  rights
generally, and (ii) the remedy of specific performance and injunctive and other
forms  of equitable relief may be subject to  equitable  defenses  and  to  the
discretion of the court before which any proceeding therefor may be brought.

           (b)   The Board of Directors of Onsite has duly and validly approved
and taken all corporate  action required to be taken by such Board of Directors
for  the  consummation of the  transactions  contemplated  by  this  Agreement.
Onsite's purchase  is  not  a  transaction that constitutes a change in control
under any of Onsite's stock option  or  any  other  benefit  plans in which any
employee of Onsite or any of its subsidiaries participates.

     3.4   CONSENTS  AND  APPROVALS;  NO  VIOLATIONS.   Except as disclosed  in
Section 3.4 of the Disclosure Schedule, attached to this  Agreement  as Exhibit
B2, and for filings, permits, authorizations, consents, and approvals as may be
required  under,  and other applicable requirements of, the Securities Act  and
the Securities Exchange  Act  of 1934, as amended (the "Exchange Act"), neither
the execution, delivery, or performance of this Agreement, nor the consummation
by Onsite of the transactions contemplated hereby nor compliance by Onsite with
any of the provisions hereof will  (i) conflict with or result in any breach of
any  provision  of  the  Certificate of  Incorporation  or  Bylaws  or  similar
organizational documents of  Onsite,  (ii)  require any filing with, or permit,
authorization,  consent,  or  approval  of,  any  court,   arbitral   tribunal,
administrative  agency, or other governmental or other regulatory authority  or
agency (a "Governmental  Entity"), (iii) result in a violation or breach of, or
constitute (with or without  due notice or lapse of time or both) a default (or
give   rise  to  any  right  of  termination,   amendment,   cancellation,   or
acceleration)  under, or require any consent or waiver under, any of the terms,
conditions, or provisions  of  any  note, bond, mortgage, indenture, guarantee,


<PAGE15>


other evidence of indebtedness, lease, license, contract, agreement (including,
without limitation, project or customer  agreements)  or  other  instrument  or
obligation  to  which  Onsite or any of its subsidiaries is a party or by which
any of them or any of their  properties  or  assets  may  be  bound  (a "Onsite
Agreement"),  or  (iv)  violate  any  order, writ, injunction, decree, statute,
rule, or regulation applicable to Onsite,  any  of  its  subsidiaries or any of
their properties or assets, except in the case of clause (ii),  (iii)  or  (iv)
where  the  failure  to  obtain  such  permits,  authorizations,  consents,  or
approvals  or  to  make  such  filings,  or  where such violation, breaches, or
defaults  or  the  failure  to  obtain  such consents  or  waivers  would  not,
individually or in the aggregate, have a  material adverse effect on Onsite and
its subsidiaries, taken as a whole, and will  not materially impair the ability
of Onsite to consummate the transactions contemplated hereby.

     3.5   SEC REPORTS AND FINANCIAL STATEMENTS.   Onsite  has  filed  with the
SEC, and has heretofore made available to LTS, true and complete copies of, all
forms, reports, schedules, statements, and other documents required to be filed
by it and its subsidiaries since January 1, 1997, under the Exchange Act or the
Securities  Act  (as  such  documents have been amended since the time of their
filing, collectively, the "Onsite  SEC  Documents").   As  of  their respective
dates  or,  if amended, as of the date of the last such amendment,  Onsite  SEC
Documents, including, without limitation, any financial statements or schedules
included therein,  (a)  did not contain any untrue statement of a material fact
or omit to state a material  fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they were made, not misleading,  and (b) complied in all material respects with
the applicable requirements of Exchange Act and the Securities Act, as the case
may be, and the applicable rules and  regulations  of the SEC thereunder.  Each
of the consolidated financial statements included in  Onsite SEC Documents have
been prepared from, and are in accordance with, the books and records of Onsite
and  its  consolidated  subsidiaries,  comply  in  all material  respects  with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto, have been prepared  in  accordance  with  GAAP
applied  on  a  consistent  basis during the periods involved (except as may be
indicated in the notes thereto)  and  fairly present the consolidated financial
position and the consolidated results of  operations  and  cash flows of Onsite
and its consolidated subsidiaries as at the dates thereof or  for  the  periods
presented  therein.   Onsite maintains a system of internal accounting controls
sufficient to provide reasonable  assurances that (i) transactions are executed
in  accordance  with  management's  general  or  specific  authorization;  (ii)
transactions  are recorded as necessary  to  permit  preparation  of  financial
statements in conformity  with  GAAP and to maintain accountability for assets;
(iii)  access  to assets is permitted  only  in  accordance  with  management's
general or specific  authorization;  and  (iv)  the recorded accountability for
assets is compared with existing assets at reasonable intervals and appropriate
action is taken with respect to any differences.

     3.6  ABSENCE OF CERTAIN CHANGES.  Except to  the  extent  disclosed in (a)
Onsite SEC Documents filed prior to the date of this Agreement or  (b)  Section
3.6   of  the  Disclosure  Schedule,  since  June  30,  1997,  Onsite  and  its
subsidiaries   have   conducted  their  respective  businesses  and  operations


<PAGE16>


consistent with past practice only in the ordinary and usual course.  From June
30, 1997, through the date  of  this  Agreement, there has not occurred (i) any
events, changes, or effects (including the incurrence of any liabilities of any
nature, whether or not accrued, contingent or otherwise) having or, which would
be reasonably likely to have, individually  or  in  the  aggregate,  a material
adverse  effect  on  Onsite  and  its subsidiaries, taken as a whole; (ii)  any
declaration, setting aside or payment  of  any  dividend  or other distribution
(whether  in cash, stock or property) with respect to the equity  interests  of
Onsite or of  any  of its subsidiaries; or (iii) any change by Onsite or any of
its subsidiaries in  accounting principles or methods, except insofar as may be
required by a change in GAAP.

     3.7  NO UNDISCLOSED  LIABILITIES.   Except  (a)  as  reflected on Onsite's
consolidated balance sheet for the fiscal year ended June 30,  1997, (b) to the
extent  disclosed  in  Onsite  SEC  Documents filed prior to the date  of  this
Agreement, (c) for liabilities and obligations  incurred in the ordinary course
of business, consistent with past practice and not in excess of $400,000 in the
aggregate  since June 30, 1997, and (d) as disclosed  in  Section  3.7  of  the
Disclosure Schedule,  neither  Onsite  nor any of its subsidiaries has incurred
any  liabilities  or  obligations  of  any  nature,  whether  or  not  accrued,
contingent  or  otherwise, that have or would be  reasonably  likely  to  have,
material adverse  effect  on  Onsite  and  its subsidiaries taken as a whole or
would be required to be reflected or reserved against on a consolidated balance
sheet of Onsite and its subsidiaries (including  the notes thereto) prepared in
accordance with GAAP as applied in preparing the consolidated  balance sheet of
Onsite and its subsidiaries as of June 30, 1997.

IV.   COVENANTS

     4.1   INDEMNIFICATION.   Exhibit  C  lists  contractual  obligations   and
liabilities  relating to LTS which  have  been  incurred  in  the  name  of  or
guaranteed individually  by  the  LTS  Shareholders.  Title to the three listed
trucks will be transferred to LTS, and the  related  debt  obligations shall be
transferred  to  LTS  or  shall  be paid in full, promptly after  the  Closing.
Onsite agrees to promptly use its  best  efforts  to  cause such other personal
obligations  and  guarantees  as  set  forth  in Exhibit C to  be  released  or
canceled, to the extent that creditors allow, and  to  indemnify and defend the
LTS Shareholders against any liabilities, losses, damages  or expenses they may
incur as a result of such contractual obligations and liabilities.

     4.2   EMPLOYEE  BENEFIT  PLANS.   LTS  shall  continue  to administer  the
Employee  Benefit  Plans  in place prior to the Closing Date, as  disclosed  in
Section 2.14 of the Disclosure Schedule, attached hereto.

     4.3   DIRECTORS OF LTS.   The directors of LTS, from and after the Closing
Date, shall be Richard T. Sperberg, Frank Mazanec and Audrey Nelson Stubenberg,
until their successors shall have  been  duly elected or appointed or qualified
or until their earlier death, resignation,  or  removal  in accordance with the
Articles of Incorporation and Bylaws of LTS.  Each of Royal  and  Aldrich shall
also continue to be a director of LTS until March 31, 1999 or until  he  is  no
longer an employee of LTS, whichever is earlier.


<PAGE17>


     4.4   OFFICERS  OF  LTS.   From  the Closing Date until at least March 31,
1999, or until each is no longer an employee  of  LTS,  whichever  is  earlier,
Royal  shall  hold  the  offices  of President and Chief Operating Officer, and
Aldrich  shall  hold the offices of Vice  President  and  Responsible  Managing
Officer.  From the Closing Date, Richard T. Sperberg shall serve as Chairman of
the Board, Chief  Executive Officer and Treasurer, and Audrey Nelson Stubenberg
shall serve as Secretary, until their successors have been appointed.  LTS will
be operated as a wholly-owned  subsidiary  of Onsite.  Until at least March 31,
1999, LTS will continue its operations as a  separate  company as now conducted
by LTS with the same staff levels, lines of authority, policies, procedures and
officer  duties,  except as otherwise agreed upon by the LTS  Shareholders  and
Onsite.  If for two  consecutive  calendar  quarters LTS falls below 75% of the
currently approved quarterly projections of revenues  and  net  income  for the
period  from  April 1, 1998 until March 31, 1999, as attached hereto as Exhibit
D, or such quarterly projections approved by a majority of the directors of LTS
for future periods, Onsite may take appropriate corrective actions.  The rights
and duties of the  LTS  officers  shall  be  as  set  forth in their employment
agreements with LTS, attached to this Agreement.

     4.5   ADDITIONAL AGREEMENTS.

           (a)  EMPLOYMENT  AGREEMENTS.   Royal  and  Aldrich   shall   execute
employment  agreements with LTS, in the forms attached hereto as Exhibit E  and
Exhibit F, respectively.

           (b)  LOANS FROM ONSITE TO LTS.  Onsite agrees to loan up to $100,000
to LTS to satisfy  the  obligations  of  LTS as set forth in Exhibit G attached
hereto.  Such loan shall be due April 1, 1999,  accrue  interest  at prime rate
plus  2%, adjusted quarterly, have quarterly payments of accrued interest,  and
shall otherwise  be  subject  to  any  other terms and conditions as negotiated
between Onsite and LTS.

           (c)  PAYROLL LOANS FROM ONSITE  TO  LTS.   Onsite agrees to issue to
LTS an internal revolving credit line for up to $100,000  outstanding principal
at  any  time for the sole purpose of meeting the payroll obligations  of  LTS.
Such line  shall  accrue  interest at no more than prime rate plus 2%, adjusted
quarterly, have quarterly payments  of  accrued  interest and be subject to any
other terms and conditions as negotiated between Onsite  and  LTS.  This credit
line  shall  be  in  addition to the loan available pursuant to Section  4.5(b)
above.

           (d)  BUSINESS  PLAN.   To  the extent the officers of LTS find it in
the best interest of LTS to expand its marketing and sales effort, the officers
shall develop a reasonable Business Plan  in  sufficient  detail  to  allow the
Board to reasonably project the impact of the proposal on the cashflow,  income
statement  and  balance  sheet of LTS.  Further, the Board of LTS shall approve
the implementation of the  Business  Plan so long as the Business Plan does not
project aggregate expenses for such additional  marketing  and  sales effort of
more  than  $250,000,  and  does  not  have  a negative impact on the projected
earnings of LTS.


<PAGE18>


           (e)  BONDING CAPACITY.  To the extent  that  Onsite  is  capable  of
obtaining  bonding  under  terms and conditions similar to the bonding which it
presently  secures,  and  the bonding  for  existing  or  otherwise  identified
projects will not be disrupted,  Onsite  agrees  to  provide  and indemnify for
bonding capacity for the pursuit of bonded business for LTS.

           (f)  TAX  ELECTION.   The  parties  agree  that  no elections  under
Section 338 of the Internal Revenue Code of 1986, as amended,  will be filed in
connection with the acquisition of the LTS Shares by Onsite.

           (g)  AUDIT OF LTS FINANCIAL STATEMENTS.  It is agreed  that  the LTS
financial  statements will be audited by Onsite's auditors at Onsite's expense.
The costs of  such  audit  will  not  be  taken into account in determining the
Income Eligible for Earn-Out.

     4.6   CONSENTS AND APPROVALS.  Each of  the  LTS  Shareholders  and Onsite
will  take  all reasonable actions necessary to comply promptly with all  legal
requirements  which may be imposed on it with respect to this Agreement and the
transactions  contemplated   hereby   (which  actions  shall  include,  without
limitation,  furnishing  all  information  in  connection  with  any  necessary
approvals  of  or  filings with any  Governmental  Entity)  and  will  promptly
cooperate with and furnish  information  to  each  other in connection with any
such  requirements  imposed  upon  any  of  them  or  any of  their  respective
subsidiaries   in   connection  with  this  Agreement,  and  the   transactions
contemplated hereby.   Each  of  the LTS Shareholders and Onsite will, and will
cause its respective subsidiaries  to, take all reasonable actions necessary to
obtain any consent, authorization, order  or  approval of, or any exemption by,
any Governmental Entity or other public or private  third  party required to be
obtained  or made by Onsite or any of its subsidiaries in connection  with  the
taking of any action contemplated by this Agreement.

     4.7   COOPERATION.   Subject  to the terms and conditions herein provided,
each of the parties hereto agrees to  use  all  reasonable  efforts to take, or
cause  to  be  taken,  all  action and to do, or cause to be done,  all  things
necessary, proper or advisable,  whether  under applicable laws and regulations
or otherwise (including, without limitations,  such  actions as may be required
to be taken under applicable state securities or blue  sky  laws  in connection
with  the issuance of the Onsite Shares as contemplated hereby), or  to  remove
any injunctions  or  other  impediments  or  delays,  legal  or  otherwise,  to
consummate  and  make effective the purchase and sale of the LTS Shares and the
other transactions  contemplated by this Agreement and the Ancillary Agreements
to which it is a party.  In case at any time after the Closing Date any further
action is necessary or desirable to carry out the purposes of this Agreement or
the Ancillary Agreements  to  which  it  is  a party, the parties shall use all
reasonable efforts to take, or cause to be taken, all such necessary actions.

     4.8   NOTIFICATION OF CERTAIN MATTERS.  The  LTS  Shareholders  shall give
prompt  notice  to  Onsite  and  Onsite  shall  give  prompt  notice to the LTS
Shareholders, of the occurrence or non-occurrence of any event  the  occurrence


<PAGE19>


or non-occurrence of which would cause any representation or warranty contained
in  this  Agreement  to  be untrue or inaccurate in any material respect at  or
prior to the Closing Date.   Any such event which occurs after the execution of
this Agreement and is so disclosed  before  the  Closing  or  in the disclosing
party's  Closing  certificate  under Section 1.6 will not cause the  disclosing
party to be in default or breach  of  this  Agreement,  but  shall  entitle the
nondisclosing party to terminate this Agreement as if such event constituted  a
default for purposes of Section 5.1.

V.   TERMINATION

     5.1   TERMINATION.    Anything   herein   or  elsewhere  to  the  contrary
notwithstanding, if either Onsite or the LTS Shareholders materially default in
the due and timely performance of any of its or their warranties, covenants, or
agreements under this Agreement, the non-defaulting  party  may  on the Closing
Date give notice of termination.  The termination shall be effective  five days
after the Closing Date, unless the specified defaults have been cured.

     5.2   EFFECT  OF  TERMINATION.   In  the  event of the termination of this
Agreement as provided in Section 5.1 above, this  Agreement  shall  become null
and  void,  and  there  shall be no liability on the part of Onsite or the  LTS
Shareholders hereunder except  (a) for breach of this Agreement, and (b) as set
forth in Section 6.1 below.

VI.  MISCELLANEOUS

     6.1   FEES AND EXPENSES.  Except  as  contemplated  by this Agreement, all
costs  and  expenses  incurred  in  connection  with  this  Agreement  and  the
consummation of the transactions contemplated hereby shall be paid by the party
incurring such expenses.

     6.2   FINDERS' FEES.

           (a)  There  is  no  investment  banker,  broker,  finder   or  other
intermediary  which  has been retained by or is authorized to act on behalf  of
either of the LTS Shareholders  who  might be entitled to any fee or commission
from LTS upon consummation of the transactions contemplated by this Agreement.

           (b)  There  is  no  investment   banker,  broker,  finder  or  other
intermediary which has been retained by or is  authorized  to  act on behalf of
Onsite  or  any  of  its  subsidiaries  who  might  be  entitled to any fee  or
commission  from  Onsite  or any of its subsidiaries upon consummation  of  the
transactions contemplated by this Agreement.

     6.3   SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  The representations and
warranties of the LTS Shareholders  and  Onsite  contained herein shall survive
the  execution  and  delivery  of this Agreement and the  consummation  of  the
transactions called for by this Agreement for a period of 2 years from the date
of this Agreement unless a lesser time period is specified.


<PAGE20>


     6.4   INDEMNIFICATION.

           (a)  By LTS Shareholders.   The  LTS Shareholders covenant and agree
to  defend,  indemnify  and hold harmless Onsite  and  each  of  its  officers,
directors, employees, agents, advisors and shareholders and affiliates, as such
persons  existed  prior  to   the   Closing  Date  (collectively,  the  "Onsite
Indemnitees")  from  and  against,  any  loss,  liability,  damage  or  expense
(including reasonable attorneys' fees and  costs)  which  any Onsite Indemnitee
may  suffer,  sustain  or  become  subject  to as a result of a breach  of  any
representation or warranty or covenant by the  LTS  Shareholders  contained  in
this Agreement.

           (b)  By  Onsite.   Onsite  covenants and agrees to defend, indemnify
and hold harmless the LTS Shareholders  and  each of their agents, advisors and
affiliates, as such persons existed prior to the  Closing  Date  (collectively,
the "LTS Indemnitees") from and against any loss, liability, damage  or expense
(including  reasonable attorneys' fees and costs) which any LTS Indemnitee  may
suffer, sustain  or  become  subject  to,  as  a  result  of  a  breach  of any
representation, warranty or covenant by Onsite contained in this Agreement.

     6.5   NOTICES.   All  notices  or  other communications required hereunder
shall be in writing and shall be sufficient in all respects and shall be deemed
delivered  after  3  days if sent via registered  or  certified  mail,  postage
prepaid; the next day if sent by overnight courier service; or one business day
after transmission, if  sent  by  facsimile  to the following (or at such other
address for a party as shall be specified by like notice):

           (a)  if to Onsite:

                Onsite Energy Corporation
                701 Palomar Airport Road, Ste. 200
                Carlsbad, CA  92009
                Attn: Richard T. Sperberg
                Telephone No.:   (760) 931-2400
                Facsimile No.:   (760) 931-2952

           with a copy to:

                Bartel Eng Linn & Schroder
                300 Capitol Mall, Suite 1100
                Sacramento, CA 95814
                Attn: Scott E. Bartel, Esq.
                Telephone No.:   (916) 442-0400
                Facsimile No.:   (916) 442-3442

           (b)  if to the LTS Shareholders, to:

                Lighting Technology Services, Inc.
                1715 East Wilshire Avenue


<PAGE21>

                Santa Ana, CA  92705
                Attn: Russell William Royal and Keith Aldrich
                Telephone No.:   (714) 550-7223
                Facsimile No.:   (714) 550-7226

           with a copy to:

                Call, Clayton & Jensen
                610 Newport Center Drive, suite 700
                Newport Beach, CA  92660
                Attn: Jon E. Jensen, Esq.
                Telephone No.:   (714) 717-3000
                Facsimile No.:   (714) 717-3100

     6.6   ENTIRE AGREEMENT; NO THIRD PARTY BENEFICIARIES; RIGHTS OF OWNERSHIP.
This Agreement (including the documents and the  instruments referred to herein
and that certain letter dated April 2, 1998) constitutes  the  entire agreement
and supersedes all prior agreements and understandings, both written  and oral,
among  the  parties  with  respect  to  the  subject  matter hereof, and is not
intended to confer upon any person, other than the parties  hereto,  any rights
or remedies hereunder.

     6.7   SEVERABILITY.   If  any term, provision, covenant or restriction  of
this Agreement is held by a court  of competent jurisdiction or other authority
to  be  invalid, void, unenforceable or  against  its  regulatory  policy,  the
remainder  of  the  terms,  provisions,  covenants  and  restrictions  of  this
Agreement  shall  remain  in  full  force  and  effect  and  shall in no way be
affected, impaired or invalidated.

     6.8   BINDING ARBITRATION.  Any claim, dispute, or controversy arising out
of  this  Agreement,  or  breach  thereof,  shall be resolved by submission  to
binding arbitration.

           (a)  Arbitration Notice.  The arbitration  shall  commence  upon any
party  sending  to  any  other party to this Agreement a notice in writing (the
"Arbitration Notice") demanding  arbitration  and specifying the issue(s) to be
arbitrated and all relief sought (the "Arbitration Matter").

           (b)  Selection of Arbitrators.

                (i)   The parties, or their legal representatives, may agree in
writing upon a sole arbitrator.

                (ii)  In the event they cannot so agree each side shall, within
fifteen (15) days after the giving of the Arbitration  Notice,  furnish  a list
of  acceptable  arbitrators consisting of attorneys at law.  From the  combined
lists of acceptable  arbitrators,  each side may reject all but one arbitrator.
The remaining acceptable arbitrators  shall  constitute  a  new  list  and  the
process shall be repeated until three (3) acceptable arbitrators are designated
who shall constitute the "Arbitration Panel."


<PAGE22>


                (iii) If  three  (3)  acceptable  arbitrators are not appointed
within thirty (30) days after giving the Arbitration Notice, the Superior Court
of the State of California for the County of San Diego  shall,  upon the filing
of  a  petition  by  any  of  the parties hereto pursuant to the provisions  of
California Code of Civil Procedure  Section  1281.6 (or any successor section),
and  after a hearing at which all parties are afforded  an  opportunity  to  be
present  and  be  heard, select a third neutral arbitrator, from a list of five
(5) persons obtained  by  the court from the parties jointly or, if they cannot
agree,  from  the  San  Diego  County   office   of  the  American  Arbitration
Association, to join  each of the party-appointed  arbitrators  resulting  from
Section 6.8(b)(ii) above to constitute the Arbitration Panel.

           (c)  Books  and Records.  The parties agree to make available to the
Arbitration  Panel  all  books,   records,  schedules,  and  other  information
requested by it.  Such matters are  to  be  made  available  to the Arbitration
Panel  at  such  times  as are deemed necessary by it to make its  decision  as
herein provided.  The Arbitration  panel  shall have all those powers set forth
in  Section 1282.6 of California Code of Civil  Procedure  including,  but  not
limited  to,  those  powers  relating  to  the  production  of  books, records,
documents and other evidence.

           (d)  Discovery.   The  parties may conduct such discovery,  and  the
Arbitration Panel shall have such discovery  powers,  as  are  set forth in the
California  Code  of  Civil  Procedure Section 1283.05.  The Arbitration  Panel
shall be empowered to grant all  provisional relief permitted by the California
Code of Civil Procedure.  In addition  to  all  other arbitration rights hereby
provided,  the  provisions  of  Sections  1282.2,  1282.4  and  1282.6  of  the
California  Civil  Code shall apply.  In addition to any  and  all  arbitration
rights hereby provided,  the  arbitration  proceedings  and  discovery shall be
conducted  pursuant  to  Sections  1282  et  seq. of California Code  of  Civil
Procedure, including, without limitation, the  provisions  of  Sections 1282.2,
1282.4, 1283 and 1283.5.

           (e)  Enforcement.   Enforcement  of  the  Arbitration Panel's  award
shall  be  effected  pursuant to California Civil Code Sections  1281  et  seq.
However, the provisions  of  California  Code of Civil Procedure Section 1281.8
shall not apply and the Arbitration Panel  shall  be  specifically empowered to
grant  all provisional remedies permitted under the California  Code  of  Civil
Procedure.

           (f)  Location.   The  arbitration  shall take place in the County of
San Diego, State of California, at a time and place selected by the Arbitration
Panel.   Notice  in  writing  of such time and place  shall  be  given  by  the
Arbitration Panel to each party  at least thirty (30) days prior to the date so
fixed.

           (g)  Time  Periods.   The   Arbitration   Panel   shall  diligently,
expeditiously, and in good faith hear and decide the Arbitration  Matter  under
consideration, within the limits and subject to the standards set forth in this
Agreement.  In any event, such decision shall be rendered not later than thirty
(30) days after the arbitration hearing is conducted.  (i) If there is only one
(1) arbitrator, his/her decision shall be final and binding. (ii)  If there are
three  (3)  arbitrators,  the  agreed  decision of any two (2) of them shall be


<PAGE23>


final and binding.  (iii) If a neutral third  arbitrator was appointed pursuant
to Section 6.8(b)(iii) above, and the two (2) party-appointed  arbitrators  are
unable  to  agree upon a decision, the decision of the neutral third arbitrator
shall be final and binding.

           The  Arbitration  Panel  shall  prepare  an  award  in writing which
reflects the final decision of the Arbitration Panel and a copy  of  same shall
be  delivered  to  each  party  hereto.  Judicial confirmation, correction,  or
vacation of the decision of the Arbitration  Panel  shall be sought only in the
San Diego County Superior Court, which judgment may be  enforced  and  shall be
accorded  full  faith  and  credit  in  any  court  of  competent jurisdiction,
including any jurisdiction in which is located any real property  which  is the
subject matter of the dispute.

           (h)  Binding   Effect.    The  arbitration  award  shall  be  final,
conclusive and binding on all parties thereto and shall be non-appealable.  The
costs of the arbitrators shall be borne by the losing party.

     6.9  ATTORNEYS FEES.  In the event of any action, suit, arbitration or
dispute  arising out of this Agreement,  or  the  parties'  performance  as
outlined herein,  the  prevailing  party  shall  be entitled to an award of
costs, including an award of reasonable attorneys' fees.

     6.10  GOVERNING LAW.  This Agreement shall be  governed  and  construed in
accordance  with  the laws of the State of California without giving effect  to
the principles of conflicts of laws thereof.

     6.11  ASSIGNMENT.  Neither this Agreement nor any of the rights, interests
or obligations hereunder  shall  be  assigned  by  any  of  the  parties hereto
(whether by operation of law or otherwise) without the prior written consent of
the other parties.  Subject to the preceding sentence, this Agreement  will  be
binding  upon,  inure  to  the benefit of and be enforceable by the parties and
their respective successors and assigns.

     6.12  LTS SHAREHOLDERS' LIABILITIES.  With respect to any liability of the
LTS  Shareholders  to  Onsite based  on  the  representations,  warranties  and
covenants made by the LTS Shareholders in this Agreement:

           (a)  Each LTS  Shareholder's individual liability to Onsite shall be
limited to one-half ( 1/2 ) of the total liability of the LTS Shareholders.

           (b)  Each LTS Shareholder's  individual  total  liability  to Onsite
shall  not  exceed  the  total value of the consideration received by such  LTS
Shareholder for his LTS Shares.   For  this purpose, the Onsite shares received
by such LTS Shareholder at the Closing shall  be  valued  at the greater of (i)
$0.75 per share, or (ii) the average closing price of Onsite's  Class  A Common
Stock for the twenty (20) business days preceding the Closing, and any Earn-Out


<PAGE24>


Shares  received by such LTS Shareholder shall be valued at the average closing
price of  Onsite's  Class  A  Common  Stock  for  the twenty (20) business days
preceding March 31, 1999.

           (c)  The Shareholders shall have no such  liability  to Onsite based
on a loss, liability or payment of LTS or Onsite to the extent that  Onsite  or
LTS  receives  a payment on account of the loss, liability or payment under any
of its insurance  policies  from  a  third party insurer.  If such an insurance
payment is made and an LTS Shareholder  has previously made a payment to Onsite
which  would  not have been required under  this  paragraph  if  the  insurance
payment had been  made  before  the payment by the LTS Shareholder, Onsite will
reimburse the LTS Shareholder for such payment by the LTS Shareholder.

           (d)  The LTS Shareholders  will  have  no  such  liability to Onsite
until  the  aggregate  amount  of  such  liability  exceeds $50,000.   If  such
aggregate liability exceeds $50,000, the LTS Shareholders  will  be  liable for
the total liability in excess of $50,000.  However, if any individual liability
exceeds  $50,000, the LTS Shareholders will be liable for the entire amount  of
such liability,  and such liability will not be taken into account for purposes
of the first two sentences of this paragraph 6.12(d).

     6.13  COUNTERPARTS.   This  Agreement  may  be  executed  in  two  or more
counterparts,  all of which shall be considered one and the same agreement  and
shall become effective  when  two or more counterparts have been signed by each
of the parties and delivered to the other parties, it being understood that all
parties need not sign the same counterpart.

     IN WITNESS WHEREOF, the parties have caused this Agreement to be signed by
their respective officers thereunto  duly  authorized  as  of  the  date  first
written above.

ONSITE ENERGY CORPORATION:
                                 By: RICHARD T. SPERBERG
                                      Richard T. Sperberg,
                                      Chief Executive Officer


ROYAL:                           RUSSELL WILLIAM ROYAL
                                 Russell William Royal


ALDRICH:                         KEITH ALDRICH
                                 Keith Aldrich