<PAGE>

                                                                    EXHIBIT 10.1

                       ADMINISTRATIVE SERVICES AGREEMENT
                       ---------------------------------


     THIS ADMINISTRATIVE SERVICES AGREEMENT ("Agreement") is made and entered
                                              ---------
into by and between Archstone Communities Trust, a Maryland Real Estate
Investment Trust ("the Company"), and SCGroup Incorporated, a Texas corporation
                   -----------
("SCGroup"). This Agreement shall supersede and replace the Administrative
  -------
Services Agreement executed by the parties on January 1, 1999 upon expiration of
that earlier agreement on December 31, 1999.

     WHEREAS, the Company wishes to purchase from SCGroup certain administrative
services designed to assist the Company in the cost-efficient management of the
Company's administrative and business affairs in the manner and pursuant to
terms and conditions as more specifically described herein; and

     WHEREAS, SCGroup desires to provide or cause to be provided those services
requested by the Company under such terms and conditions; and

     WHEREAS, SCGroup will perform similar administrative services for other
entities (collectively "SCGroup Clients") which may vary from time to time.
                        ---------------

     NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements set forth herein, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
intending to be legally bound hereby, the parties hereto agree as follows:

     Section 1.  Services
                 --------

          1.1  Scope of Services. The specific services to be provided by
               -----------------
SCGroup to the Company (each a "Service" and collectively the "Services") are
and shall be described in Schedule A. Except as provided in Section 3.2, the
scope of such Services selected may not be expanded, reduced or otherwise
modified by the Company without the written consent of SCGroup.

          1.2  Access, Information, Cooperation and Assistance. The Company will
               -----------------------------------------------
provide SCGroup with all access, Company information, cooperation and
assistance necessary for SCGroup to perform the Services in accordance with this
Agreement.

          1.3  Increases in Volume of Service. If the Company completes a
               ------------------------------
transaction, such as the acquisition of a new business unit, that will result in
an increase of twenty-five (25%) percent or more in the volume of Services to be
delivered in any service category (e.g., Disbursements, Cash Management,
Corporate Tax) as designated on Schedule A, the Company shall promptly notify
SCGroup of such change. SCGroup shall exercise commercially reasonable efforts
to accommodate and deliver the increased
<PAGE>

volume of Services as soon as practicable and, in any event, within 60 days of
its receipt of notice of such increased volume.

          1.4  Subcontracting.  SCGroup may delegate and subcontract some or all
               --------------
of its obligations under this Agreement to one or more third parties. If SCGroup
does so, it will remain responsible for the performance of all obligations
performed by such subcontractors to the same extent as if such obligations were
performed by SCGroup employees.

     Section 2.  Charges.
                 -------

          2.1  Charges.
               -------

          (a)  The charges to be paid by the Company to SCGroup for the Services
to be performed by SCGroup during the Initial Term and any extension of such
Term ("Renewal Period") are and shall be set forth in Schedule B ("Charges").
Unless otherwise agreed, such Charges shall be subject to modification only in
accordance with Sections 1.3 or 3.2. The Company agrees that the Charges paid by
the Company in each service category during the Initial Term and any Renewal
Period shall equal at least seventy-five percent (75%) of the Charges that would
have been paid by the Company in such service category based upon the estimated
service volume agreed upon by the parties for such period (the "Estimated
Charges"). If the Charges fail to reach such level during the Initial Term or
any Renewal Period, the Company shall pay to SCGroup an amount equal to the
total Charges that would have been paid by the Company in such service category
if the actual service volume had equaled seventy-five percent (75%) of the
agreed upon estimate, less the total Charges actually paid by Company in such
service category during the period in question. The Company shall pay such
amount to SCGroup within fifteen (15) days after the expiration or termination
of the Initial Term and thereafter within fifteen (15) days after the expiration
or termination of any applicable Renewal Period. For purposes of this Section
2.1, "service volume" shall include the volumes of the Company plus the volumes
of any subsidiaries of the Company that are administrative services customers of
SCGroup for the applicable service category. Should this Agreement be terminated
in accordance with Section 10.3, the estimated service volumes for purposes of
this Section 2.1 shall be prorated through the date of termination.

          (b)  Notwithstanding the above, if during any calendar quarter during
the Initial Term or any Renewal Period the Charges paid by the Company for any
service category are less than 75% or more than 125% of the Estimated Charges,
the parties may renegotiate the applicable rates and minimum volumes
prospectively under mutually acceptable terms; provided that if the parties are
unable to reach agreement on changes to rates or minimum volumes, the Company
may elect to terminate this Agreement in accordance with Section 10.3 or proceed
under the existing agreement. If the Charges paid by the Company are less than
75% of the Estimated Charges and the Company elects to terminate the Agreement
in accordance with Section 10.3, the Company shall pay SCGroup an amount equal
to 75% of the Estimated Charges through the date of
<PAGE>

termination, less the total charges actually paid by the Company for the
terminated service category during the applicable period.

          2.2  Pass-Through Expenses.  Pass-through expenses are listed in
               ---------------------
Schedule C. Unless otherwise agreed by the parties, pass-through expenses shall
be paid by the Company directly. SCGroup will promptly provide the Company with
the original third-party invoice for such expenses, together with a statement
that SCGroup has reviewed and validated the invoiced charges. SCGroup will
highlight any charges that appear to be inappropriate and will work with the
Company to reconcile all bills with the third-party suppliers.

          2.3  Retained Expenses.  The Company shall retain financial
               -----------------
responsibility for those functions and expense items shown as retained expenses
in Schedule D. The Company will be billed directly by third parties for such
services. The Company agrees to pay such expenses in a timely manner and in the
ordinary course of business.

          2.4  Extra Services.  Any services requested by the Company beyond
               --------------
those set forth in Schedule A will be performed in accordance with mutually
agreed terms, conditions and charges.

          2.5  Payment for Services.
               --------------------

          (a)  At the beginning of each calendar month, SCGroup shall invoice
the Company for the Charges specified in Schedule B for the Services received by
the Company during the preceding month. Such Charges shall be payable in full
within 20 days of receipt of such invoice by the Company. Any past due amounts,
unless such amounts have been disputed by the Company in accordance with Section
2.5(b), shall be subject to a late payment fee equal to the Wells Fargo Bank
N.A. prime lending rate plus 2 percent on the past due balance or the maximum
rate allowable by law, whichever is less. The Company shall cause payment to be
received by SCGroup at SCGroup's offices at 7777 Market Center Avenue, El Paso,
Texas 79912, or by wire transfer in accordance with the wire instructions
provided from time to time to the Company in writing by SCGroup.

          (b)  The Company shall provide SCGroup with prompt written
notification of any disputed Charges prior to the payment date of such Charges.
The notification shall provide a description of the specific reasons for the
dispute. No payment may be withheld for undisputed Charges.

          2.6  Taxes.
               -----

          (a)  Each party will pay any real estate or personal property taxes on
property it owns or leases, franchise and privilege taxes on its business, and
taxes based on its net income or gross receipts.
<PAGE>

          (b)  SCGroup will pay all sales, use, excise, value-added, services,
consumption, and other taxes and duties payable by SCGroup on any goods or
services used or consumed by SCGroup in providing the Services where the tax is
imposed on SCGroup's acquisition or use of such goods or services and the amount
of tax is measured by SCGroup's costs in acquiring such goods or services.

          (c)  In the case of any sales, use, excise, value-added, services,
consumption, or other tax that is assessed on the provision of the Services as a
whole, or on any particular hardware, software, or Service received by the
Company from SCGroup, the Company will pay such taxes.

          (d)  The Parties agree to fully cooperate with each other to enable
each to more accurately determine its own tax liability and to minimize such
liability to the extent legally permissible.

     Section 3.  Term.
                 ----

          3.1  Initial Term.  Subject to Section 3.2, the term of this Agreement
               ------------
shall commence on January 1, 2000 and, unless terminated earlier in accordance
with Section 10, shall end, other than with respect to Human Resources and
Payroll services, on December 31, 2000 (the "Term"). The term of this Agreement
                                             ----
with respect to Human Resources and Payroll services shall end on July 1, 2000.

          3.2  Term Extension.
               --------------

          (a)  On or before September 1 of each calendar year, SCGroup shall
deliver to the Company (i) a list of the services (other than Risk Management
services) to be offered by SCGroup during the succeeding calendar year ("Renewal
Period"), (ii) the charges and performance standards associated with such
services, (iii) any additional or different terms and conditions applicable to
such service offerings, and (iv) a budget for the Renewal Period using estimated
service volumes. Thereafter, on or before September 30, the Company shall
provide SCGroup in writing with a nonbinding list of the services it wishes to
purchase during the succeeding calendar year; provided that, for any Service
that the Company is using in the then current calendar year not included in the
list, this Agreement shall terminate on December 31 of that year. On or before
November 30, the Company shall provide SCGroup with a written confirmation of
the Services it wishes to purchase during the succeeding calendar year; provided
that, if the Company fails to respond by such date, it shall be deemed to have
declined to purchase such services for the succeeding calendar year and this
Agreement shall terminate as to such services on the succeeding February 28 with
no termination fee due SCGroup. For terminated services, SCGroup and the Company
shall work together to transfer pertinent information to the Company or its
designee, and the Company agrees to pay SCGroup for the SCGroup employees
providing such information at their customary hourly rates and to reimburse
SCGroup for any expenses reasonably incurred by SCGroup in connection with this
effort. After the Company selects the Services to be provided by SCGroup
<PAGE>

during the Renewal Period, the scope of such Services may not be expanded,
reduced or otherwise modified by the Company without the written consent of
SCGroup.

          (b)  With respect to Risk Management services, in March of each year
SCGroup shall begin the renewal process for the then upcoming fiscal year that
begins June 30. During the renewal process, SCGroup shall provide periodic
updates to the Company regarding negotiations with underwriters and SCGroup's
estimated fees. On or before June 1 of each year, SCGroup shall deliver a
description of the services offered for the upcoming fiscal year, together with
the terms, charges and performance standards for such services. On or before
June 15, the Company shall notify SCGroup in writing whether the Company wishes
to purchase Risk Management services from SCGroup; provided that if the Company
fails to respond by June 15, it shall be deemed to have declined to purchase
such services for the succeeding fiscal year and this Agreement shall terminate
with respect to Risk Management services on June 30 of the then current year.

          (c)  If the Company has chosen to purchase Services for the succeeding
calendar year in accordance with Section 3.2(a), SCGroup shall prepare and
deliver to the Company on or before December 15 a Schedule A describing the
specific Services to be provided to the Company during the Renewal Period.
SCGroup also shall revise and deliver to the Company Schedules B, C, D and E on
or before that date to reflect the charges, performance standards and other
terms and conditions applicable to such Services.

     Section 4.  Audit of Services.  At any time during regular business hours
                 -----------------
and as often as reasonably requested by the Company's officers, SCGroup shall
permit the Company or its authorized representatives to examine and make copies
and abstracts from the records and books of SCGroup for the purpose of auditing
the performance and Charges of SCGroup under the terms of this Agreement;
provided, that all costs and expenses of such inspection shall be borne by the
--------
Company and provided further that the Company shall have no right and shall not
            -------- -------
make copies of abstracts of any SCGroup Materials (as defined in Section 9.2).

     Section 5.  Company Data.  Data obtained by SCGroup from the Company in
                 ------------
connection with the performance of any Services ("Company Data") is and shall
remain the exclusive property of the Company. SCGroup is authorized to have
access to and make use of the Company Data as necessary and appropriate for the
performance by or for SCGroup of its obligations under this Agreement. Upon the
termination or expiration of this Agreement, SCGroup will return to the Company
all Company Data then in its possession. SCGroup will not use Company Data for
any purpose other than for providing the Services.

     Section 6.  Confidentiality.  Except as otherwise provided in this
                 ---------------
Agreement, SCGroup and the Company each agree that all information communicated
to it by the other, whether before or after the effective date of this
Agreement, will be received in strict confidence, will be used only for purposes
of this Agreement, and will not be disclosed by the recipient party without the
prior written consent of the other party. Each
<PAGE>

party agrees to use the same means it uses to protect its own Confidential
Information, but in any event not less than reasonable means, to prevent the
disclosure of such information to outside parties. However, neither party will
be prevented from disclosing information to its counsel or regular public
accountants, or from disclosing information which belongs to such party, or is
(a) already known by the recipient party without an obligation of
confidentiality; (b) publicly known or becomes publicly known through no
unauthorized act of the recipient party; (c) rightfully received from a third
party; (d) independently developed without use of the other party's confidential
information; (e) disclosed without similar restrictions to a third party by the
party owning the confidential information; or (f) required to be disclosed
pursuant to a requirement of a governmental agency or legal requirement if the
disclosing party provides the other party with notice of this requirement prior
to disclosure.

     Section 7.  Performance Standards
                 ---------------------

          7.1  Service Levels.  SC Group shall exercise commercially reasonable
               --------------
efforts to perform the Services in accordance with the service levels set forth
in Schedule E. To the extent any service level is determined by the parties to
be unattainable using commercially reasonable efforts, SCGroup will identify the
level of service which is reasonably attainable, the modifications or changes
necessary to attain the higher service level and the costs associated with such
modifications or changes. The parties will meet as necessary to evaluate and
revise the service levels. SCGroup will measure the quality and quantity of the
Services actually delivered by SCGroup. The data obtained by SCGroup will be one
of the bases for evaluating and possibly revising Schedule E. All such revisions
must be agreed to by the Company and SCGroup. If requested, the Company will
provide copies of relevant information in its possession to SCGroup to assist in
any review or revision of the service levels.

          7.2  Failure to Attain Service Levels.  If SCGroup fails to attain any
               --------------------------------
service level, SCGroup will (i) promptly investigate the cause of the problem;
(ii) prepare a report identifying the cause of the problem and recommending
solutions; and (iii) use commercially reasonable efforts to correct the problem
and to begin meeting the service levels as soon as practicable, at no
incremental cost to the Company.

     Section 8.  Prevention of Performance.  SCGroup shall not be determined to
                 -------------------------
be in violation of this Agreement if it is prevented from performing any
Services hereunder, in whole or in part, by the acts or omissions of the Company
or a third party or for any other reason beyond its reasonable control,
including without limitation acts of God, nature or public enemy, war, civil
disturbance, labor dispute, failure or fluctuation in electrical power, heat,
light, air conditioning or telecommunication service, or limitations of law,
regulations or rules of the Federal, state or local government or of any agency
thereof.

     Section 9.  Software and Other Intellectual Property.
                 ----------------------------------------
<PAGE>

          9.1  Company Materials. To the extent the Company possesses any
               ------------------
ownership, license or other right (including any patent, copyright, trademark,
trade secret or other proprietary right) in any software, equipment, data,
information, process or material ("Company Materials"), it shall retain such
right or interest and, except as provided in this Section, SCGroup shall not
acquire any right or interest in such Company Materials pursuant to this
Agreement. The Company hereby grants to SCGroup, without charge, the limited
nonexclusive nontransferable right to access and use Company Materials during
the term of this Agreement as and to the extent necessary for the performance of
the Services.

          9.2  SCGroup Materials. To the extent SCGroup possesses any ownership,
               -----------------
license or other right (including any patent, copyright, trademark, trade secret
or other proprietary right) in any software, equipment, data, information,
process or material ("SCGroup Materials") used in providing the Services, it
shall retain such right or interest and the Company shall not acquire any right
or interest in such SCGroup Materials pursuant to this Agreement.

          9.3  Intellectual Property Rights.  If, in the course of providing
               ----------------------------
Services under this Agreement, the Company requests and SCGroup agrees to
develop any Software, process or other material to the specification of the
Company, not being SCGroup Materials or an enhancement of SCGroup Materials, and
the Company pays all of the Charges associated with such development ("Work
Product"), then all legal and beneficial ownership rights therein (including all
patent, copyright, trademark, trade secret or other proprietary rights) shall
belong to the Company. SCGroup hereby assigns to the Company all right, title
and interest that arises in SCGroup with respect to such Work Product, including
all the patent, copyright, trademark, trade secret or other proprietary rights
related thereto, and SCGroup agrees to take all reasonable steps and execute all
documents necessary to perfect title to such Work Product in the Company.
SCGroup shall be permitted to access and use such Software, process or other
material as and to the extent necessary for the provision of the Services.

          9.4  SCGroup Ownership Rights.  Except as provided for in Section 9.3
               -------------------------
above, all patent, copyright, trademark, trade secret or other proprietary
rights in any Software, process or other material created by SCGroup, its
employees or agents and all legal and beneficial rights therein shall belong to
SCGroup.

     Section 10.  Termination.
                  -----------

          10.1 Termination for Cause.  Either party may terminate this
               ---------------------
Agreement, in whole or in part, by giving written notice to the other party, if
such other party materially breaches any of its duties or obligations set forth
herein and fails to cure such breach within thirty (30) days of written notice
of such breach. If less than all
<PAGE>

Services are terminated, the parties will equitably adjust the Charges to be
paid by the Company hereunder for the remaining Services.

          10.2 Terminate for Insolvency. Either party may terminate this
               ------------------------
Agreement, upon written notice to the other party, if such other party (a) files
for bankruptcy; (b) becomes or is declared insolvent (c) is the subject of any
proceedings related to its liquidation or insolvency or the appointment of a
receiver or similar officer; (d) makes an assignment for the benefit of all or
substantially all of its creditors; or (e) enters into an agreement for the
composition, extension, or readjustment of substantially all of its obligations.

          10.3 Termination for Convenience.  The Company may terminate any or
               ---------------------------
all Services covered by this Agreement at any time upon ninety (90) days prior
written notice to SCGroup and the payment of a termination fee equal to the
average of the monthly Charges for the terminated Services for the three months
preceding the notice of termination. SCGroup and the Company shall work together
to transfer pertinent information to the Company or its designee, and the
Company agrees to pay SCGroup for the SCGroup employees providing such
information at their customary hourly rates and to reimburse SCGroup for any
expenses reasonably incurred by SCGroup in connection with this effort.

     Section 11.  Disclaimer and Limitation of Liability and Intellectual
                  -------------------------------------------------------
                  Property Claims Between Parties.
                  -------------------------------

          11.1 DISCLAIMER.  EXCEPT AS SPECIFICALLY STATED IN THIS AGREEMENT,
               -----------
NEITHER SCGROUP NOR THE COMPANY MAKES ANY REPRESENTATIONS OR WARRANTIES, EXPRESS
OR IMPLIED, REGARDING ANY MATTER, INCLUDING THE MERCHANTABILITY, SUITABILITY,
ORIGINALITY, TITLE, OR FITNESS FOR A PARTICULAR USE OR PURPOSE.

          11.2 LIMITATION OF LIABILITY.  IN NO EVENT SHALL A PARTY BE LIABLE FOR
               -----------------------
INDIRECT, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES EVEN IF SUCH
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Additionally, the
total aggregate liability of either party for claims asserted by the other party
under or in connection with this Agreement, regardless of the form of the action
or the theory of recovery, shall be limited to the total Charges paid by the
Company to SCGroup during the 12 months preceding the event which is the subject
of the claim (the "Liability Cap"); provided, however, that the Liability Cap
                                    --------
shall not apply with respect to (i) claims that are the subject of the
indemnification provisions set forth herein, or (ii) any failure to pay Charges
due and owing to SCGroup under this Agreement.

     Section 12.  Indemnification.
                  ----------------
<PAGE>

          12.1 By SCGroup. SCGroup shall indemnify, defend and hold harmless
               ----------
the Company and its officers, directors, employees, agents, successors, and
assigns from any and all Losses attributable to third party claims arising from
willful misconduct or gross negligence by SCGroup in the performance of its
obligations under this Agreement.

          12.2 By the Company.  Except as provided in Section 12.1, the Company
               --------------
shall indemnify, defend and hold harmless SCGroup and its officers, directors,
employees, agents, successors, and assigns from any and all Losses attributable
to third party claims arising under or in connection with this Agreement.

     Section 13.  Relationship of the Parties.
                  ---------------------------

          13.1 Independent Contractor Status.  SCGroup is an Independent
               -----------------------------
Contractor. This Agreement will not be construed as creating any partnership,
agency relationship or other form of legal association that would impose
liability upon one party for the other party's actions or failure to act. Nor
will this Agreement be construed as providing either party with the right, power
or authority (express or implied) to create any duty for, or obligation of, the
other party.

          13.2 Responsibility for Employees.  Each party will be responsible for
               ----------------------------
the management, direction and control of its employees and other agents. All
SCGroup employees used in performing SCGroup's obligations under this contract
shall be employed solely and exclusively by SCGroup, and all Company employees
used in performing the Company's obligations under this Agreement shall be
employed solely and exclusively by the Company. Thus, SCGroup and the Company
shall not be considered a joint or single employer of any employee.

          13.3 SCGroup Control of Services.  Except where this Agreement
               ----------------------------
expressly provides that SCGroup will perform certain identified Services as
agent for the Company, the Services will be under the control, management and
supervision of SCGroup.

     Section 14.  Notices.
                  -------

          14.1 Manner of Delivery. Each notice, demand, request, consent,
               ------------------
report, approval or communication (each a "Notice") which is or may be required
                                           ------
to be given by either party to the other party in connection with this Agreement
and the transactions contemplated hereby, shall be in writing, and given by
telecopy, personal delivery, receipted delivery service, or by certified mail,
return receipt requested, prepaid and properly addressed to the party to be
served.

          14.2 Addresses.  Notices shall be addressed as follows:
               ---------

                If to the Company:
                     Archstone Communities Trust
                     7777 Market Center Avenue
<PAGE>

                     El Paso, TX  79912
                     Attention:  William Kell


                With a copy to:
                     Archstone Communities Trust
                     7670 S. Chester Street, Suite 100
                     Englewood, CO  80112
                     Attention:  Charles E. Mueller, Jr.

                If to SCGroup:
                     SCGroup Incorporated
                     7777 Market Center Avenue
                     El Paso, Texas 79912
                     Attention:  Vincent L. Dodds

          14.3 Effective Date of Notice. Notices shall be effective on the date
               ------------------------
sent via telecopy, the date delivered personally or by receipted delivery
service, or three (3) days after the date mailed.

          14.4 Change of Address.  Each party may designate by notice to the
               -----------------
others in writing, given in the foregoing manner, a new address to which any
notice may thereafter be so given, served or sent.

     Section 15.  Entire Agreement. This Agreement, together with the Schedules
                  ----------------
hereto, constitutes and sets forth the entire agreement and understanding of the
parties pertaining to the subject matter hereof, and no prior or contemporaneous
written or oral agreements, understandings, undertakings, negotiations,
promises, discussions, warranties or covenants not specifically referred to or
contained herein or attached hereto shall be valid and enforceable. No
supplement, modification, termination in whole or in part, or waiver of this
Agreement shall be binding unless executed in writing by the party to be bound
thereby. No waiver of any of the provisions of this Agreement shall be deemed,
or shall constitute, a waiver of any other provision hereof (whether or not
similar), nor shall any such waiver constitute a continuing waiver unless
otherwise expressly provided.

     Section 16.  Priority. If there is any apparent conflict or inconsistency
                  --------
between the provisions set forth in this Agreement, and the provisions set forth
in any schedule, exhibit, attachment or supplement attached hereto, to the
extent possible such provisions will be interpreted in a manner so as to make
them consistent. If it is not possible to interpret such provisions
consistently, the provisions set forth in the body of this Agreement will
prevail.

     Section 17.  No Third Party Beneficiaries. The parties do not intend, nor
                  ----------------------------
will any clause of this Agreement be interpreted to create, for any third party
any obligation to or benefit from the Company or SCGroup.
<PAGE>

     Section 18.  Survival. All provisions of this Agreement which contemplate
                  --------
performance or observance following the expiration or earlier termination of
this Agreement, will survive any such expiration or earlier termination.
Additionally, all provisions of this Agreement will survive the expiration or
earlier termination of this Agreement to the fullest extent necessary to give
the parties the full benefit of the bargain expressed herein.

     Section 19.  Consents and Approvals. Where agreement, approval, permission,
                  ----------------------
acceptance, consent or similar action by either party is required by any
provision of this Agreement, such action will not be unreasonably delayed,
conditioned or withheld.

     Section 20.  Binding Effect. This Agreement shall be binding upon and shall
                  --------------
inure to the benefit of the parties hereto, each of their respective successors
and permitted assigns, but may not be assigned by either party without the prior
written consent of the other party, and no other persons shall have or derive
any right, benefit or obligation hereunder.

     Section 21.  Headings. The headings and titles of the various paragraphs of
                  --------
this Agreement are inserted merely for the purpose of convenience, and do not
expressly or by implication limit, define, extend or affect the meaning or
interpretation of this Agreement or the specific terms or text of the paragraph
so designated.

     Section 22.  Governing Law. This Agreement shall be governed in all
                  -------------
respects, whether as to validity, construction, capacity, performance or
otherwise, by the laws of the State of Texas.

     Section 23.  Severability. If any provision of this Agreement shall be held
                  -------------
invalid by a court with jurisdiction over the parties to this Agreement, then
and in that event such provision shall be deleted from the Agreement, which
shall then be construed to give effect to the remaining provisions thereof. If
any one or more of the provisions contained in this Agreement or in any other
instrument referred to herein shall, for any reason, be held to be invalid,
illegal or unenforceable in any respect, then in that event, to the maximum
extent permitted by law, such invalidity, illegality or enforceability shall not
affect any other provisions of this Agreement or any other such instrument.

     Section 24.  Counterparts. This Agreement may be executed in one or more
                  ------------
counterparts, each of which shall be deemed an original, but all of which taken
together shall be considered one and the same instrument.

     Section 25.  Limitation of Liability. In accordance with the Declaration
                  -----------------------
of Trust of the Company, notice is hereby given that all persons dealing with
the Company
<PAGE>

will look to the assets of the Company for the enforcement of any claim against
the Company, as none if the trustees, officers, employees or shareholders of the
Company assume any personal liability for obligations entered into by or on
behalf of the Company.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first above written.


                            ARCHSTONE COMMUNITIES TRUST



                            By:  /s/ CHARLES E. MUELLER, JR.
                                ---------------------------
                                Charles E. Mueller, Jr.
                                Chief Financial Officer



                            SCGROUP INCORPORATED


                            By:  /s/ THOMAS N. KENDALL
                                ----------------------
                                Thomas N. Kendall
                                Managing Director

<PAGE>

                                  SCHEDULE A

                            DESCRIPTION OF SERVICES


The Services to be provided by SCGroup to the Company are described in this
Schedule A. Such Services shall be provided to the home office, as well as all
regional offices within the United States.

The Company and SCGroup shall each designate a service manager with authority to
act on its behalf with respect to all matters pertaining to this Agreement. The
contact information for each service manager and any related personnel may be
found on Appendix 1.


     1.   Business Services
          -----------------

          1.1   General Ledger Accounting Services (NOT APPLICABLE)

          1.2   Financial Reporting and Analysis (NOT APPLICABLE)

          1.3   Budgeting and Forecasting (NOT APPLICABLE)

          1.4   Payroll Bank Reconciliations
                 .  Reconcile Company payroll bank accounts on a monthly basis
                    utilizing SCGroup standard bank reconciliation forms
                 .  Provide journal entries necessary to correct Company book
                    cash balance by the end of the following month
                 .  Prepare bank reconciliations generally by the end of each
                    subsequent month

          1.5   Registrar and Transfer Agent Services (NOT APPLICABLE)

          1.6   Stock Option Administration and Reporting (NOT APPLICABLE)

     2.   Cash Management
          ---------------

          2.1   Bank Account Management
                .   Set up and maintain internal controls
                .   Open, close, and change bank or investment accounts (i.e.,
                    tax ID, legal name, certificate, resolution, signors)
                .   Set up Mellon automated investment sweep
                .   Maintain bank account database and files
                .   Reconcile accounts daily and forecast cash needs
                .   Support controlled disbursement/positive pay, investment,
                    concentration accounts
<PAGE>

                .   Maintain XRT relating to accounts/folios
                .   Provide deposit slips and endorsement stamps
                .   Execute internal funds transfers to concentrate cash
                    efficiently
                .   Utilize target balance to optimize cash
                .   Cross-train team members and create contingency plans
                .   Prepare daily bank deposits and overnight to concentration
                    account
                .   Checks received in Cash Management by 3:00 pm will be sent
                    overnight to the bank provided that the transaction costs
                    are lower than the additional interest earnings
                .   Research inquiries requested by companies on existing
                    accounts
                .   Assist with bank research on existing accounts
                .   Process Direct Debits
                .   Letter of Credit management services (same charge as a low
                    maintenance account)
                .   Balance, activity, and NSF reports will generally be
                    provided daily
                .   Cash optimization procedures will generally be performed
                    daily
                .   All investments managed by Cash Management will adhere to
                    Company investment guidelines

          2.2   Electronic Disbursements
                .   Sort, mark and distribute Company wires
                .   Input and transmit wires
                .   Create and maintain XRT scripts relating to wires/ACHs
                .   Maintain wire software and passwords
                .   Ensure that funds are available for payment
                .   Process for further credit wires
                .   Facilitate payments for utilities, taxes, payroll, and
                    mortgages
                .   Fund utility payments daily
                .   Fund controlled disbursement checking accounts
                .   Set up repetitive wires/ACHs, including setup in XRT; i.e.,
                    construction draws, interest payments
                .   Subject to receipt of accurate and timely information (noon
                    on the business day before for U.S. wires; four business
                    days ahead for international wires), wires will generally be
                    sent on time. Wires are executed subject to receipt of any
                    necessary funding.

          2.3   Special Handling Electronic Disbursements
                .   Execute late wires
                .   Execute and monitor tentative wires
                .   Obtain and provide Fed reference numbers
<PAGE>

                .   Monitor incoming wires
                .   Execute AM wires
                .   Morning payments are executed subject to receipt of any
                    necessary funding
                .   Execute cashier's checks
                .   Execute foreign currency drafts
                .   Execute international wires
                .   Setup/maintenance of FX (foreign exchange) relationships
                .   Participate in FX competitive bidding
                .   Combine multiple wires into one payment (count as one
                    special handling wire)
                .   Execute tax payments - EFTPS debit notification
                .   Late requests will be processed on a best-efforts basis
                .   Special handling instructions will be followed provided that
                    the instructions are included on the disbursement request
                    form

          2.4   Investing and Borrowing
                .   Manage line of credit activities
                .   Monitor monthly LIBOR rates
                .   Maintain and report LOC status reports
                .   Summarize LOC agreements
                .   Federated investment activities - invest and redeem cash as
                    deemed prudent or necessary consistent with Company
                    guidelines
                .   Maintain investment guidelines
                .   Maintain Federated Investment Software
                .   All investments executed by Cash Management will adhere to
                    Company investment guidelines
                .   Investment and borrowing decisions will be made daily and
                    executed in time to meet financial institution deadlines

          2.5   Transaction Reporting
                .   XRT to PeopleSoft automated journal entries
                .   Federated reports
                .   NSF reports
                .   Wire templates
                .   XRT reports
                .   Remittance information via phone/email
                .   Hardware support
                .   Other software support
                .   XRT research support
                .   Balance, activity, and NSF reports will be provided daily

          2.6   Bank Fee and Relationship Management
<PAGE>

                .   Negotiate and review bank fees
                .   Process fees for payment - including check requests
                .   Utilize bank earnings credits to the extent possible or
                    practicable
                .   Coordinate and participate in bank visits
                .   Process monthly account analysis statement
                .   Set up electronic account analysis in XRT

          2.7   Projects/Research (charged at an hourly rate)
                .   Research Company inquiries not included in services above
                .   Create XRT to PeopleSoft interface
                .   Coordinate company mergers
                .   Set up Direct Debit
                .   Set up new companies in XRT and related software and
                    databases
                .   Special projects require Company vice president approval
                    before execution
                .   SCGroup performance is subject to external constraints
                    including, but not limited to, receipt of information on
                    transactions, Company's operational needs, bank availability
                    schedules, bank deadlines, borrowing provisions, and
                    transaction costs

     3.   Corporate Tax Administration (NOT APPLICABLE)
          -----------------------------

     4.   Disbursements
          -------------

          4.1  Invoice Processing Services (paper and Web-based invoice
     processing)

               (a)  General
                    .  Process all properly approved and coded invoices for
                       payment; issue check to vendor
                       .  Enter invoices into system (paper-based only)
                       .  Enter wire transfers into system
                       .  Reclass invoices to correct G/L accounts
                       .  Generate bi-weekly check runs
                       .  Match remittances
                       .  Obtain authorized manual signature if check amount is
                          over $10,000
                       .  Overnight/Special Handling checks processed daily
                       .  Mail checks
                       .  File "processed" invoices (paper-based only)
                       .  Issue positive-pay bank transmissions daily
<PAGE>

                       .  Perform back-end audits for policy compliance (paper-
                          based only)
                       .  AP documentation generally filed within two business
                          days of processing (paper-based only)
                       .  Checks disbursed within one business day after
                          issuance
                       .  Customer Service Calls generally returned within two
                          business hours; research completed and resolved within
                          two business days
                       .  SODA's generally processed within three business days
                          of receipt
                    .  Purchase Card Administration
                       .  Issue/change/cancel P-Cards
                       .  Issue cardholders statements monthly
                       .  Provide standard P-Card reports on an as-requested
                          basis
                       .  Provide one custom report (excess reports to be billed
                          at $50.00 each)
                       .  Download MasterCard transactions to G/L system monthly
                          (more than once monthly to be billed at $50.00 each)
                       .  Prepare payment to Wells Fargo for P-Card transactions
                          monthly

                    .  Other Services
                       .  Electronic funds validation
                       .  Recurring payment processing
                       .  Returned checks
                          .   Issue void at bank and in system
                          .   Reissue, if necessary
                       .  1099 reporting compliance and issuance
                       .  Download CASS transactions to G/L system monthly (more
                          than once monthly to be billed at $50.00 each)

               (b)  Emergency (Manual) Check Services
                    .  Process emergency or manual check as requested by Company
                    .  Overnight/Special Handling processing
                    .  Emergency checks generally disbursed same business day
                       after issuance per special handling instructions

               (c)  AP Compliance (Reject) Program Services (for paper-based
                    invoice processing only)
<PAGE>

                    .  Prepare reject notification for improperly completed
                       vouchers; return to sender
                    .  Oversee and administer the AP Compliance Program and
                       review with Company senior management
                    .  Monitor compliance by company, property and non-
                       compliance type
                    .  Provide monthly reports on all non-compliance issues to
                       Company senior management

               (d)  Stop Payments and Reissued Checks
                    .  Process stop payments; void check in system and at bank

          4.2  Accounts Payable Help Desk Services

               (a)  General
                    .  Answer general accounts payable ("A/P") Help Desk calls
                    .  Provide payment status of invoices, date paid, check
                       numbers, etc.
                    .  Provide residents information on their refunds
                    .  Provide Signature Authorization Level information
                    .  Provide A/P Manuals/Stamps (one manual per property;
                       additional hard copy manuals to be billed at $15.00 each
                       and stamps to be billed at cost)
                    .  Provide information on common A/P forms
                    .  Provide information on A/P Policies and Procedures
                    .  Perform A/P research as required

               (b)  Vendor Management
                    .  Process and enter New Vendor Setup Forms (forms received
                       must be complete and accurate per A/P Manual)
                    .  Update vendor information in vendor database
                    .  Maintain Full-Risk/No-Risk Vendor Compliance Program
                    .  Maintain insurance certificates for full-risk vendors
                       . Maintain filing system for full-risk/no-risk vendors
                       . Prepare Vendor Credit Applications
                       . Maintain filing system for credit applications
                       . Process BCL vendor downloads
          4.3  Corporate Travel Center

               (a)  Corporate Charge and Phone Card Administration
<PAGE>

                    .  Process corporate charge card and phone card
                       applications, generally within one business day of
                       receipt, and distribute cards generally within one
                       business day of receipt from card provider(s)
                    .  Acknowledge inquiries from cardholders regarding card
                       losses, past due accounts, and reconciliation questions
                       generally within two business hours of receipt
                    .  Notify delinquent cardholders on a monthly basis
                    .  Assist in individual card reconciliation and credit
                       refund research
                    .  Liaison to AMEX on behalf of cardholders
                    .  Prepare and coordinate weekly wire transfers to AMEX
                    .  Provide standard card activity reports to Management on a
                       quarterly basis
                    .  Full charge card account reconciliation provided at a
                       rate of $65.00 per hour
                    .  Ad hoc reports provided at a rate of $25.00 each

               (b)  Corporate Travel
                    .  Manage relationship with Travel Agency Partner (AMEX)
                    .  Negotiate agreements with travel agency, charge card,
                       air, car, and hotel providers for Company's use
                    .  Provide timely updates to all travelers and travel
                       planners on travel policy and industry/vendor changes
                    .  Acknowledge inquiries regarding travel-related service
                       issues, generally within two business hours of receipt
                    .  Track and trend all travel-related service issues
                    .  Conduct annual survey, by company, to identify
                       opportunities for improvement
                    .  Update and maintain corporate travel policy manual
                    .  Process new Business Traveler Profiles, generally within
                       one business day of receipt
                    .  Process, approve and reconcile Company direct billing
                       accounts for air, car and hotel
                    .  Analyze travel data and provide standard reports to each
                       company on a quarterly basis with benchmarking
                       information. Reports will generally be generated by the
                       25th day of the month following quarter end.
                    .  Monitor travel policy compliance and provide standard
                       exception reports to Management
                    .  Provide ad hoc reports at a rate of $25.00 each
<PAGE>

          4.4   T&E Voucher Processing Services
                . Process and enter New Vendor Setup Forms for employee expense
                  reimbursements, generally within one business day of receipt
                . Date stamp all vouchers received
                . Code expense report vouchers for correct general ledger
                  account and enter into accounting system
                . Perform random back-end audits for policy compliance
                . File and archive processed expense reports
                . Generate files for wire transfers to American Express on
                  behalf of employee
                . Generate employee checks for out-of-pocket expenses
                . Process expense reimbursement emergency checks and American
                  Express payments at a rate of $50.00 per request
                . Process and reconcile employee cash advances

          4.5   Special Projects (subject to the Special Projects hourly rates)

                . Train SCGroup affiliated company employees on use of A/P
                  system
                . Set up and train on P-card, utility outsourcing programs
                . Change in business structure and operation which requires
                  process changes
                . Consult with companies for special projects
                . Major research projects
                . Copies of checks, invoices and employee expense vouchers and
                  other documentation as requested by the Company.
                . Requests from external auditors
                . Special reports and logs
                . Sales and Use Tax compliance

     5.   Facilities Management
          ---------------------
          (Services are available only at the El Paso, Texas office at 7777
           Market Center Avenue.)

          5.1   National Supply/Service Agreements
                .  Provide a centralized contact for the purchase/lease of copy,
                   fax, and postage equipment in addition to Steelcase cube
                   components
                .  Assist in the purchase process and establish national
                   purchasing agreements for the benefit of the Company

          5.2   Access Control System
                .  Maintain an access control system for the benefit of all
                   associates and their guests
                .  This is a 24-hour per day, 7 day a week service
<PAGE>

                .  Requests for visitor/guest access should be made 24 hours in
                   advance of the required need

          5.3   Reception
                .  Receive and redirect telephone calls
                .  Greet visitors
                .  Receive and log in deliveries
                .  Switchboard and lobby hours:
                   .   Main Building
                       .  7:30 am-5:30 pm: Monday through Thursday (excluding
                          holidays)
                       .  7:30 am-5:00 pm: Friday, or the last workday of the
                          week
                    .  MIS Building
                       .  8:00 am-5:00 pm: Monday through Friday (excluding
                          holidays)

          5.4   Mail Center
                .   Receipt and distribution of USPS mail, packages, and
                    supplies
                .   Prepare various items for shipment, both domestic and
                    international, generated by the Company
                .   Track mail
                .   Additional requirements/service cutoffs:
                    .  All USPS mail items must be received in the mail room by
                       4:15 pm for delivery to the Post Office on the same day
                    .  All other shipments must be received in the mailroom by
                       4:45 pm for delivery to the various carriers the same day

          5.5   Reprographics Center
                .   Provide bulk copy services and booklet preparation
                .   Assist in the maintenance of self-serve copy equipment
                    throughout the facility

          5.6   Other
                .   Provide central facsimile services, incoming documents, to
                    be delivered in conjunction with mail delivery (or through
                    an automated fax mail system)
                .   Assist in the maintenance of fax machines throughout the
                    facility
                .   Local purchasing responsibility for day-to-day operating
                    needs, including office supplies. Special order items will
                    be billed directly to the requesting department.
                .   Provide basic new hire and associate cube supplies
                .   Housekeeping and janitorial responsibilities in the
                    Operations and the MIS facilities
<PAGE>

                .   Prepare coffee between the hours of 7:30 am - 2:00 pm
                .   Relocation of equipment and cube renovation/modification
                .   Conference room setup and tear-down as required
                .   General facility maintenance as required
                .   Replacement of printer toner cartridges
                .   Provide ground transportation needs for guests/visitors
                .   Provide pick up and delivery of items (non-food) and
                    documents

     6.   Human Resources
          ---------------

          6.1   Health Plan Administration (NOT APPLICABLE)

          6.2   401(k) and NSP Plan Administration (NOT APPLICABLE)

          6.3   Pre-Employment Services (NOT APPLICABLE)

          6.4   Compliance
                .   HR File Room Services
                    .  General Company support - retrieve information from files
                    .  Receive and facilitate orders for HR forms and supplies,
                       including transition boxes.
                    .  Create personnel files as paperwork is received
                    .  Process all filing received, including active,
                       terminated, and benefits filing
                    .  Maintain current state and federal posters

          6.5   Performance Review & Compensation Services (NOT APPLICABLE)

          6.6   Relocation Services (NOT APPLICABLE)

          6.7   Database Management Services
                .   Maintain database information on employee documentation
                .   System Administration for human resources, benefits and
                    payroll
                .   Prepare and comply with government reporting: EEO-1, VETS100
                    and Census Bureau, as submitted by the HR Manager
                .   Process Employment Verifications
                .   Review hiring paperwork for Company compliance (I-9's, W-
                    4's, Applications, etc.)
                .   Maintain current new hire forms via public folders,
                    corporate service intranet
                .   Maintain company-wide telephone directory
<PAGE>

          6.8  HRIS Reports
               .   Standard report processing delivered by PeopleSoft as defined
                   by the HR/Payroll Implementation Team
               .   HRIS Custom Reports are available upon request by the Company

          6.9  Recruitment Services (where services are required to be performed
               in a specific location, this agreement refers to the El Paso,
               Texas office at 7777 Market Center Avenue)

               (a)    Resume Management
                   .  Receive resumes, log into central database and send
                        notification cards to all applicants

               (b)    Employment Process
                   .  Accept open position forms and post to the weekly posting
                   .  Update the Career Opportunities Jobline, Security Capital
                        Group Incorporated Web Page
                   .  Review and screen applicants for position requirements
                   .  Schedule interviews with applicants, prepare interview
                        packets and forward to hiring manager
                   .  If out-of-town applicant, ensure that all receipts are
                        received and expense form is completed
                   .  In conjunction with hiring manager, make conditional offer
                        of employment to candidate and generate offer letter
                   .  Schedule new hire for pre-employment testing
                   .  Send rejection letters to unsuccessful applicants after
                        acceptance of offer

               (c)    New Hire Process
                   .  File the candidate resume, offer letter and completed
                        application in employee's file
                   .  Submit new hire to pre-employment for processing
                   .  Create new hire agenda for orientation (name, date,
                        company, supervisor)
                   .  Send out email announcing new hire (name, title,
                        supervisor, company, cube #)
                   .  Notify candidate of pre-employment results and new hire
                        orientation
                   .  Conduct new hire orientation
                   .  Ensure new employees complete all required paperwork and
                        forward to HR File Room
<PAGE>

               (d)    Advertisement and Recruitment Strategies
                   .  Manage, develop and implement recruiting strategies
                   .  In conjunction with hiring manager, prepare and place all
                       advertisements for open positions
                   .  Review Monster Board Internet system for appropriate
                       candidates
                   .  Attend Professional and College Job Fairs to source
                       candidates
                   .  Coordinate College Relations and Recruiting activities
                       including: on-campus interviews, Co-op/Internship
                       Program, Mentor Program, Scholarship Program, and
                       student/faculty relationships
                   .  Act as liaison with external search agencies.

               (e)    Temporary Employee Requests
                   .  Coordinate with manager to discuss temporary position
                      requirements and contact temporary agencies to request
                      personnel
                   .  Interview temporary employee candidates
                   .  Process all temporary employee invoices

          7.   Business Process & Risk Assessment Services (formerly Internal
               -------------------------------------------
               Audit)

               7.1    Business Process & Risk Assessment Services provides
                      services to Shared Service clients based upon detailed
                      Internal Audit Plans (the "Audit Plan"). The Audit Plan
                      will explain the type of services to be provided, specific
                      audit objectives and cost to complete the plan. The Plan
                      costs will be billed on a flat monthly basis and
                      represents a minimum level of work to be performed by
                      Business Process & Risk Assessment Services.

                           To ensure the highest risks of the organization are
                      adequately addressed, Audit Plans are based upon a
                      comprehensive risk assessment model and management input.
                      All Audit Plans are presented to client management for
                      review and approval, and then to the Audit Committee (for
                      publicly traded companies) for final approval.

                           To provide the highest level of service in meeting
                      the Audit Plan, Business Process & Risk Assessment
                      Services takes the following steps:

                      .  Audits will be performed in an objective manner with
                         due professional care. Audits are conducted in
                         accordance with the Institute of Internal Auditors
                         Professional Standards.
<PAGE>

                     .   Significant departures from the Audit Plan will be
                         communicated to management for approval in advance of
                         completing the audit work
                     .   Strive to conduct the audits in the most efficient and
                         effective manner possible, both in the utilization of
                         audit staff and travel expenditures
                     .   For any audit requests outside the Audit Plan, prepare
                         detailed audit proposals for management approval prior
                         to the performance of any audit work
                     .   Coordinate work with the Company's external audit firm
                         to ensure maximum audit coverage and prevent
                         duplication of effort
                     .   If Business Process & Risk Assessment Services does not
                         possess specialized skills necessary for any audit,
                         retain professionals with the required skills to
                         perform the work
                     .   Strive to constantly improve internal audit services,
                         by seeking Company input and monitoring "best practice"
                         audit techniques

          8.   Management Information Systems
               ------------------------------

               8.1  Technical Products and Services
                    (a)  Technical Consulting
                     .   Network domain architecture design and project
                           management
                     .   Network and Operating System hardware and software
                           refresh and/or upgrade (e.g., Novel to NT upgrade)
                     .   Purchasing program advisory services
                     .   Email services (i.e., security and server
                           administration)
                     .   Database administration (MS SQL, Server, Oracle)
                     .   Central web server administration
                     .   Desktop software review and analysis

                    (b)  Infrastructure Usage Recovery
                     .   Recovery of cost of equipment, such as Novell and NT
                         servers, telecom switches and datacom equipment,
                         purchased by SCGroup but used exclusively by the
                         Company

               8.2  Telecommunications
                    (a)  Base Services
                         .    Contract management for "Consortium Model"
                              agreements:
                         .    Long distance
                         .    Local
                         .    Data services
                         .    Teleconferencing
                         .    Calling Card
<PAGE>

          .    Equipment maintenance and monitor service levels, pricing, etc.,
               in these agreements
          .    Inter-Company Voicemail Node Maintenance
          .    Vendor Service Trouble Escalation (Second Level Support)
          .    Establish and maintain Telecommunications Standards
          .    Quarterly audit of one month of invoices for the following
               invoices:
          .    Qwest
          .    NetSolve
          .    AT&T
          .    Local Service Providers

     (b)  Telecommunications Consulting/Office Setup
          .    Help Desk and telephone support
          .    Service Level A
               .    Questions and advice
          .    Service Level B
               .    Service problem ticket creation
               .    Contact Vendor to resolve service problem on PBX or
                    Voicemail Equipment or Network Services
               .    Remotely correct equipment problems (if remote access to
                    system available)
               .    Dispatch affiliate's service vendor if problem cannot be
                    corrected remotely (additional charges from Vendor would
                    apply)
               .    Consult with Vendor to resolve issue
          .    Service Level C
               .    MAC  order tracking
               .    MAC order  creation with Vendor
               .  Remote Administration of MAC order (if remote access to system
                  available)
               .  Dispatch Vendor if MAC order cannot be implemented remotely
                  (additional charges from Vendor would apply)
               .  Consult with Vendor to complete MAC order
               .  Generate monthly MAC order history
               .  Consulting services
               .  Telecommunication Systems Audit
               .  Telecommunications Invoices Audits (other than those covered
                  under Basic Charge Services)
               .  Recommendations on optimizing Telecommunications
                  infrastructure
               .  Equipment recommendations and procurement
          .    Office Setup Consulting and Coordination
               .  On-Site survey of requirements (on-site visit)
<PAGE>

               .  Design of wiring layout
               .  Equipment recommendations
               .  Coordinate purchase through selected vendors
               .  Coordinate wiring and equipment vendors (remotely)
               .  On-site acceptance of vendor work

     8.3  Applications Integration - PeopleSoft
               .  New technology solution planning, design, development and
                  implementation services for the PeopleSoft application to
                  include:
               .  Report development
               .  Maintenance configuration data, such as chart of accounts,
                  departments, properties, etc.
               .  PeopleSoft training
               .  Implement new PeopleSoft modules and interfaces

     8.4  PeopleSoft Operations
               .  Operate and maintain the El Paso-based servers and software
               .  Second level (after TSAs) problem escalation and resolution
                  for desk-top issues
               .  Capacity planning and performance tuning as related to regular
                  growth of the
               .  PeopleSoft production databases
               .  Track and manage all production problems and issues. This
                  includes working with each company's PS power user to define
                  priorities and work with the support team to assign, status,
                  coordinate, and communicate updates.
               .  Maintain production PeopleSoft user IDs and production
                  security classes
               .  Troubleshoot and repair problems in PeopleSoft-delivered or
                  SCG- customized software
               .  Apply HP, Oracle and PeopleSoft patches and updates as
                  required for maintenance of the production environments
               .  Analyze and update SCGroup customized production software
                  (interfaces, reports, customizations) impacted by HP, Oracle
                  and PeopleSoft patches and updates
               .  Also included in the PeopleSoft Operations costs is the Unix
                  server depreciation and related vendor maintenance fees
               .  SCGroup shall perform routine maintenance and make routine
                  changes and upgrades to the PeopleSoft systems from time to
                  time. During this process, the systems will be unavailable.
                  SCGroup shall provide at least ten (10) business days prior
                  notice of such regularly scheduled
<PAGE>

                  maintenance which will occur on Saturdays at any time or on
                  business days as follows (El Paso time):

                     System
                     ------
                     PS Fin 7.0      7:00 pm to 6:00 am
                     PS Fin 7.5      12:00 pm to 11:00 pm
                     PS HRMS 7.5     7:00 pm to 6:00 am

          The Company may request that any announced maintenance activity be
          rescheduled, provided that the Company shall pay SCGroup $10,000 upon
          notification from SCGroup of such rescheduling. Any request for
          rescheduling must be in writing and provide at least three alternative
          dates and times during the aforesaid periods. The acceptance of any
          such request and the rescheduling of any maintenance or upgrade
          activity will be at the sole discretion of SCGroup.

   9. Payroll
      -------

      9.1 Non-Web Based Input
          .   Receive payroll batch sheets
          .   Receive payroll bonus batch sheets
          .   Input payroll batch sheet data

      9.2 Payroll Payments
          .   Run and calculate bi-weekly payroll information
          .   Review bi-weekly payroll information
          .   Audit bi-weekly exception reports and queries
          .   Create and execute payroll interfaces, including positive pay,
              direct deposits, 401(k), and general ledger data
          .   Produce and generate bi-weekly payroll data and reports
          .   Prepare and distribute reports and funding requests
          .   Reconcile 401(k) contributions
          .   Prepare electronic funds request for 401(k) funding
          .   Maintain payroll systems tables, including deduction codes and
              subsets, earnings code/special accumulators, holiday schedules,
              leave plans, new company setup, new year setup, and tax locations
          .   Assist in external payroll audits
          .   Audit employee transfers from affiliates
          .   Maintain and abide by the Bureau of National Affairs (BNA)
              guidelines

      9.3 Manual Checks (Off-Cycle)
          .   All activities in 9.2 including the following:
<PAGE>

            .  Receive and input manual check requests
            .  Produce manual check reporting
            .  Issue manual check
            .  Print and distribute manual check to employee
            .  Execute special mailing instruction
            .  Transmit positive pay files

   9.4    Special Processes
          (i)  Large:
               .  Process garnishments and remit funds to proper agency
               .  Generate W2C's
          (ii) Medium:
               .  Execute electronic funds transfer payments
               .  Process relocation payments
               .  Compute and process retroactive payments
               .  Manage tax refunds
               .  Initiate stop payments and ACH reversals
               .  Maintain and process vacation and sick balances by employee
               .  Process and generate reimbursement adjustments
               .  Process short term disability payments
               .  Administer signing/annual/special bonuses
               .  Process severance agreements and terminations
          (iii)Small:
               .  Administer target bonus advances and salary advance payments
               .  Special mailing instruction-checks mailed to locations other
                  than work address
               .  Distribute pamphlets and other documents with pay-checks
               .  Manage imputed interest payments
               .  Record and adjust earnings associated with stock options, loan
                  forgiveness and taxable/non-taxable fringe benefits
               .  Input and process housing deductions, uniform deductions and
                  advanced repayments

   9.5    Payments for Expatriates (including Canada) and Monthly Payroll (NOT
          APPLICABLE)

   9.6    Tax Jurisdictions Maintained
               .  Maintain payroll database, including tax and system upgrades
               .  Review tax correspondence, reply to agency inquiries, and
                  research tax discrepancies
<PAGE>

               .  Process tax deductions and remit funds to appropriate taxing
                  agency
               .  Ensure tax returns and government regulatory reports are filed
               .  Complete tax applications, set up appropriate withholding,
                  unemployment and other accounts

     9.7   Pay Check Distribution
               .  Print, stuff, and distribute bi-weekly/monthly checks and
                  advices to employee work location

     9.8   W-2 Statement Creation and Distribution
               .  Generate and distribute W2's and duplicate W2's, as necessary

     9.9   Projects/Research (hourly charge)
           . Research Company inquiries not included in services above
           . Customize non-standard reports
           . Special projects require Company vice president approval before
             execution

           Note: Companies will also be billed directly for expenses such as:
           .  ProBusiness
           .  Pre-1999 ADP Research
           .  Postage
           .  Tax Returns

 10. Property Tax Administration (NOT APPLICABLE)
     ----------------------------

 11. Risk Management
     ---------------

     11.1  Insurance Policy Procurement
           .  Obtain new and renewal insurance quotations for all property and
              casualty coverages
              .  Meet with Company to determine coverage, limit, deductible, and
                 service requirements
              .  Prepare underwriting submission and send to markets
              .  Meet with key underwriters
              .  Answer underwriting questions
              .  Negotiate coverage, rates, policy terms and conditions, and
                 services
              .  Evaluate insurer reliability
              .  Prepare insurance proposal and present to Company
           .  Review and maintain policies
<PAGE>

                .  Verify policy terms and conditions are consistent with quote
                .  Review policy endorsements for accuracy and file
                .  Maintain original policy
            .   Process certificate of insurance requests
            .   Process premium invoices and provide breakdown of premium by
                property, company or as applicable
            .   Prepare annual insurance budget
            .   Review insurance contracts for compliance
            .   Review insurance contracts and make recommendations concerning
                risk acceptability (the Risk Management Department does not make
                management decision.)
            .   Answer coverage questions
            .   Maintain standard SCGroup Underwriting Database for all existing
                properties to include:
                .  Property name, address and location code
                .  Building and contents values
                .  Estimated annual rent/revenue
                .  Square footage/number of units
                .  Construction type
                .  Roof composition
                .  Year built
                .  Flood and earthquake zones
                .  Payroll
                .  Vehicles
            .   Update underwriting database on a quarterly basis to reflect
                newly acquired and developed properties, sales, and other
                activity

     11.2   Claims Administration

            (a) Manage claim and litigation process for all insured claims and
                lawsuits
                .  Report claims to appropriate carrier or third party
                   administrator
                .  Notify Company of losses in excess of $25,000 and keep
                   apprised of claim status
                .  Set up claim file
                .  Enter claim in RMIS OMEGA system
                .  Assist with coverage determination
                .  Assign legal counsel on lawsuits
                .  Coordinate discovery requests
                .  Review and maintain copies of all correspondence and related
                   documents associated with claim/lawsuit
                .  Participate in claim settlement discussions
<PAGE>

                .  Request settlement approval from Company on general liability
                   claims of $2,500 and above
                .  Monitor insured claims and lawsuits to conclusion

          (b)      Process Claim Payments
                .  Review invoices with claim documents to ensure amounts are
                   accurate and justified
                .  Enter invoice data in RMIS OMEGA system

          (c)      Issue Loss Reports
                .  Issue monthly reports for property, casualty and quarterly
                   reports for workers compensation claims and lawsuits

          (d)      Maintain RMIS OMEGA claim database to include
                .  Claimant name
                .  Claim number
                .  Date of loss
                .  Property name and location code
                .  Claim amount (paid and reserved)
                .  Description of loss
                .  Status of claim (open or closed)

   11.3   Bond Procurement and Maintenance

          (a)      Facilitate issuance and execution of bond indemnification
                   agreements
                .  Negotiate account rates annually
                .  Process requests for bonds
                .  Set up bond file and enter data in RMIS OMEGA system
                .  Renew bonds as required by obligee

          (b)      Process Bond Invoices
                .  Review bond premium invoices for accuracy
                .  Enter invoice information in RMIS OMEGA system
                .  Complete check requests

          (c)      Maintain RMIS OMEGA bond database to include the following
                .  Bond number
                .  Surety company
                .  Bond amount
                .  Bond type and description
                .  Property name and address
                .  Bond rate and premium
                .  Obligee name and address
<PAGE>

                .  Effective dates of coverage


     12.  Special Projects
          ----------------
          .  Direction and support of all special projects, as requested and
             authorized in advance by the Company
          .  Special projects are outside the scope of services provided by
             SCGroup. If SCGroup and Company determine that SCGroup has the
             personnel with the qualifications and time necessary to complete
             the special project requested by Company with due professional care
             and competence, SCGroup and Company will agree to an hourly billing
             rate for such services.
<PAGE>

                                  APPENDIX 1


APPENDIX TO SCHEDULE A OF THE ADMINISTRATIVE SERVICES AGREEMENT BETWEEN SCGROUP
INCORPORATED (SCGROUP) AND ARCHSTONE COMMUNITIES TRUST, AGREEMENT DATED JANUARY
1, 2000.


SCGroup Service Manager responsible for managing the respective rights and
obligations of the parties:

                       Vincent L. Dodds
                       SCGroup Incorporated
                       7777 Market Center Avenue
                       El Paso, TX 79912

                       Phone: 915-877-5831
                       Fax:   915-877-6768


Company Service Manager responsible for managing the respective rights and
obligations of the parties:


                       William Kell
                       Archstone Communities Trust
                       7777 Market Center Avenue
                       El Paso, TX 79912

                       Phone: 915-877-1773
                       Fax:   915-877-3301
<PAGE>

                                  SCHEDULE B
                                  ----------

SCGroup will provide the services listed in Schedule A to be billed at the
following rates:


<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------------------
                  Service Description                          Cost Driver                                    Rate / Cost Driver
<S>                                                       <C>                                                 <C>
----------------------------------------------------------------------------------------------------------------------------------
Business Services:
----------------------------------------------------------------------------------------------------------------------------------
   Payroll Bank Reconciliations                           Hours                                               $   35.00
----------------------------------------------------------------------------------------------------------------------------------
   Special Projects                                       Hours                                               $   65.00
----------------------------------------------------------------------------------------------------------------------------------
Cash Management:
----------------------------------------------------------------------------------------------------------------------------------
   Bank Account Management                                # of Accounts/month                                 $  100.00/(1)/
----------------------------------------------------------------------------------------------------------------------------------
   Electronic Disbursements                               # of Wires                                          $   20.00
----------------------------------------------------------------------------------------------------------------------------------
   Special Handling Electronic Disbursements              # of Disbursements                                  $   50.00
----------------------------------------------------------------------------------------------------------------------------------
   Investment and Borrowing                               $000's Bor. & Inv./month                            $  0.0167/(2)/
----------------------------------------------------------------------------------------------------------------------------------
   Transaction Reporting                                  # of Transactions                                   $    0.75/(2)/
----------------------------------------------------------------------------------------------------------------------------------
   Bank Fee and Relationship Management                   % of Bank Fees                                           10.0%
----------------------------------------------------------------------------------------------------------------------------------
   Projects/Research                                      Hours                                               $   65.00
----------------------------------------------------------------------------------------------------------------------------------
Disbursements:
----------------------------------------------------------------------------------------------------------------------------------
   Invoice Processing Services
----------------------------------------------------------------------------------------------------------------------------------
      Paper                                               Invoices                                            $    2.50
----------------------------------------------------------------------------------------------------------------------------------
      Web-based                                           Invoices                                            $    1.50
----------------------------------------------------------------------------------------------------------------------------------
      Web-based Invoice Processing over 200,000 per year  Invoices                                            $    1.20
----------------------------------------------------------------------------------------------------------------------------------
      P-Card Administration                               # of P-Cards                                        $   80.00
----------------------------------------------------------------------------------------------------------------------------------
      Emergency Checks                                    Checks                                              $   50.00
----------------------------------------------------------------------------------------------------------------------------------
      Rejects                                             # of Rejects                                        $   20.00
----------------------------------------------------------------------------------------------------------------------------------
      Stop Pays/Voids                                     # of Stop Pays                                      $   50.00
----------------------------------------------------------------------------------------------------------------------------------
   Accounts Payable Help Desk Services                    Calls                                               $    4.00
----------------------------------------------------------------------------------------------------------------------------------
   Corporate Travel Center                                Per Transaction                                     $   15.00
----------------------------------------------------------------------------------------------------------------------------------
   T&E Voucher Processing Services                        Vouchers                                            $    9.00
----------------------------------------------------------------------------------------------------------------------------------
   Copies                                                 Per Copy                                            $    0.20
----------------------------------------------------------------------------------------------------------------------------------
   Special Projects                                       Hours                                               $   65.00
----------------------------------------------------------------------------------------------------------------------------------
Facilities Management:
----------------------------------------------------------------------------------------------------------------------------------
   Facilities & Administration                            El Paso Employees                                   $  125.00
----------------------------------------------------------------------------------------------------------------------------------
Human Resources:/(3)/
----------------------------------------------------------------------------------------------------------------------------------
   Compliance - Personnel File Administration             Per Month                                           $4,166.67
----------------------------------------------------------------------------------------------------------------------------------
   Database Management-Maintenance                        Headcount/month                                     $    5.00
----------------------------------------------------------------------------------------------------------------------------------
   Database Management-Set-up Fees                        # of Setups                                         $    8.00
----------------------------------------------------------------------------------------------------------------------------------
   HRIS Standard Reports                                  Per Report/month                                    $    6.00
----------------------------------------------------------------------------------------------------------------------------------
   HRIS Custom Reports                                    # of Reports                                        $   65.00
----------------------------------------------------------------------------------------------------------------------------------
   Recruitment Services                                   New Hires                                           $2,230.00
----------------------------------------------------------------------------------------------------------------------------------
   Special Projects                                       Hours                                               $   65.00
----------------------------------------------------------------------------------------------------------------------------------
Business Process & Risk Assessment Services
----------------------------------------------------------------------------------------------------------------------------------
(formerly Internal Audit)
----------------------------------------------------------------------------------------------------------------------------------
   Perform audits                                         Hours                                               $  100.00
----------------------------------------------------------------------------------------------------------------------------------
Information Systems
----------------------------------------------------------------------------------------------------------------------------------
   Technical Products & Services:
----------------------------------------------------------------------------------------------------------------------------------
      Infrastructure Usage Recovery                       Per Month                                           $9,216.00
----------------------------------------------------------------------------------------------------------------------------------
      Telecom Voice Networks                              Per Line/month                                      $    9.00
----------------------------------------------------------------------------------------------------------------------------------
      Telecom Consulting/Setup                            Hours                                               $  100.00
----------------------------------------------------------------------------------------------------------------------------------
   Applications Integration:
----------------------------------------------------------------------------------------------------------------------------------
      Project Manager/DBA                                 Hours                                               $  105.00
----------------------------------------------------------------------------------------------------------------------------------
      Programmer/Analyst                                  Hours                                               $   85.00
----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------------
            Service Description                                   Cost Driver                       Rate / Cost Driver
----------------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>                                       <C>
PeopleSoft Operations:
----------------------------------------------------------------------------------------------------------------------------
      PS Financials                                       Per Month                                 $ 33,882.00
----------------------------------------------------------------------------------------------------------------------------
      PS HRMS/(3)/                                        Per Month                                 $ 11,295.00
----------------------------------------------------------------------------------------------------------------------------
Payroll:/(3)/
----------------------------------------------------------------------------------------------------------------------------
   On-Cycle Paychecks                                     Checks/Direct Deposits                    $      4.50
----------------------------------------------------------------------------------------------------------------------------
   Batch Manual Inputs                                    # of Inputs                               $      1.50
----------------------------------------------------------------------------------------------------------------------------
   Manual Checks (Off-Cycle)                              Checks                                    $     50.00/(4)/
----------------------------------------------------------------------------------------------------------------------------
   Special Processes                                      Per Service (large/medium/small)          $90/$60/$30
----------------------------------------------------------------------------------------------------------------------------
   Tax Jurisdictions Maintained                           # of Jurisdictions                        $     20.00
----------------------------------------------------------------------------------------------------------------------------
   Paycheck Distribution                                  # of Checks/Advices                       $      0.50
----------------------------------------------------------------------------------------------------------------------------
   W-2 Statement Creation and Distribution                Statements                                $      6.00
----------------------------------------------------------------------------------------------------------------------------
   Special Projects/Research                              Hours                                     $     65.00
----------------------------------------------------------------------------------------------------------------------------
Risk Management:
----------------------------------------------------------------------------------------------------------------------------
   Insurance Policy Procurement                           Per Premium $                             $     0.045/(5)/
----------------------------------------------------------------------------------------------------------------------------
   Claims Administration                                  Claims                                    $    220.00
----------------------------------------------------------------------------------------------------------------------------
   Bond Procurement and Maintenance                       Per Premium $                             $      0.12
----------------------------------------------------------------------------------------------------------------------------
</TABLE>


(1)  Property bank accounts are counted as one quarter of corporate bank
     accounts.

(2)  The total annual charges for Investment and Borrowing services and Bank Fee
     and Relationship Management services shall not exceed $65,000 and $40,000,
     respectively; provided that, in the event the Company is a party to any
     merger, acquisition and/or other transaction during the year which results
     in an increase in the amount of time and expense required to provide these
     services, the Company will be responsible for any fees over and above these
     maximums.

(3)  January through June only.

(4)  New Hire packets received after the second Thursday of the pay period will
     result in a manual check charge.

(5)  SCGroup's fees are earned based on total premiums earned by the insurance
     provider during the contract. This includes premium adjustments resulting
     from changes in the ratable exposure base. Fees are due to SCGroup upon
     payment of premiums to the insurance provider.
<PAGE>

                                  SCHEDULE C

          Pass-Through Expenses are expenses and costs incurred by the Company
for which SCGroup has oversight responsibility for the third-party vendor and
will review and validate the invoiced charges. These Pass-Through Expenses
include but are not limited to the following:

          -  Independent audit expenses

          -  Insurance premiums and claims

          -  Banking fees
             -     SCGroup may withdraw funds from the Company's concentration
                bank account to cover the Company's share of monthly fees and
                expenses paid by SCGroup to the Company's banks. SCGroup shall
                provide the Company with a monthly statement of such charges and
                expenses.

          -  External payroll processing fees

          -  Third-party vendors hired at the direction of the Company

          -  Out-of-pocket expenses

             -     All out-of-pocket expenses will be billed as incurred.
                Applicable out-of-pocket expenses may include but are not
                limited to: postage, envelopes, labels, forms and stationery and
                delivery and freight charges

          -  Computer hardware, software or telephone equipment purchases
<PAGE>

                                  SCHEDULE D

          Retained Expenses are costs and expenses incurred by the Company from
third parties which may provide the Company with administrative services in an
outsource arrangement. Retained expenses include, but are not limited to, the
following:

          .      Costs and expenses of third party service providers (e.g.: IBM,
             CompuCom or Merrill Lynch), including fees and out-of-pocket
             expenses.
<PAGE>

                                  SCHEDULE E

                                SERVICE LEVELS


1.   GENERAL PROVISIONS

     1.1  General. The Service Levels set forth in this Schedule E are intended
          to measure SCGroup's performance of the Services.

     1.2  Reporting. SCGroup shall provide, at no additional charge to Company,
          periodic reports describing the quality and quantity of the Services
          actually delivered by SCGroup during the defined measurement period
          and assessing SCGroup's performance during such period against the
          service levels. SCGroup will also be responsible for promptly
          investigating and correcting failures to meet the service levels in
          accordance with Section 7.2 of the Agreement.

     1.3  Exclusions. SCGroup will be relieved of responsibility if and to the
          extent SCGroup's failure to meet the service level(s) is due to:

               1.3.1  changes made to the in-scope environment by Company (e.g.,
                      installation of applications, which were not tested and
                      approved for production use)

               1.3.2  Company's reprioritization of tasks to be performed by
                      SCGroup

               1.3.3  circumstances specified in Section 8 of the Agreement

               1.3.4  outages for preventive maintenance or the installation,
                      upgrade or replacement of equipment or software or at
                      other times agreed upon in advance by Company

2.   SERVICE LEVELS

     2.1       Disbursement Processing

               SCGroup shall perform disbursement processing in accordance with
               the following service levels:

               (1)  SCGroup shall process third party invoices 95% of the time
                    by the end of the third business day after the business day
                    on which it receives approved and properly coded invoices
                    from the Company.
<PAGE>

               (2)  SCGroup shall pay third party invoices 95% of the time by
                    the end of the business day after the business day on which
                    it completes processing of such invoices or in accordance
                    with the third party's payment terms, whichever is later.

               (3)  SCGroup shall process invoices correctly and shall pay the
                    correct amount to the correct vendor 99% of the time.

          2.2  Accounts Payable Help Desk

               SCGroup shall provide accounts payable help desk services in
               accordance with the following service levels:

               (1)  The abandon rate for calls to the accounts payable help desk
                    shall be less than 12%. Abandon rate means the percentage of
                    times that callers who wish to talk to a help desk agent
                    drop off the call before talking to such an agent. If a
                    caller hangs up before the expiration of thirty (30)
                    seconds, the call will not be considered abandoned.

               (2)  SCGroup shall return customer service inquiries received by
                    voice mail or electronic mail within two (2) business hours
                    90% of the time. Business hours shall mean 8:00 a.m. to 6:00
                    p.m., Mountain Time, Monday through Friday, excluding
                    holidays.

               (3)  Research requests shall be completed and responded to by
                    SCGroup by the end of the second business day after the
                    business day on which such requests are received 90% of the
                    time.

               (4)  Third party vendors will be added to the PeopleSoft accounts
                    payable system by SCGroup by the end of the second business
                    day after the business day on which properly completed
                    requests are received 90% of the time. A properly completed
                    request form must comply with the requirements specified in
                    the Accounts Payable Manual.

          2.3  Corporate Tax (NOT APPLICABLE)
<PAGE>

          2.4  Human Resources

               SCGroup shall provide human resources services in accordance with
               the following service levels:

               (1)  SCGroup shall process Personnel Action Forms 90% of the time
                    by the end of the third business day after the business day
                    on which it receives approved and properly completed
                    Personnel Action Forms from the Company.

               (2)  SCGroup shall respond to employee requests for information
                    or assistance with respect to health or retirement benefits
                    by the end of the second business day after the business day
                    on which such requests are received 90% of the time
                    (provided the employee has first contacted the applicable
                    benefits service provider and followed the escalation
                    procedures prescribed by such service provider for problem
                    resolution).

          2.5  Management Information Systems

               (1)  Critical (Severity 1) MIS production application support
                                          ----------------------------------
                    problems communicated by the Company in accordance with
                    --------
                    SCGroup's established reporting process shall be
                    acknowledged by SCGroup (via telephone, voice mail or email)
                    and assigned an initial prioritization level within two (2)
                    hours 90% of the time.

               (2)  Non-critical (Severity 2-4) MIS production application
                                                --------------------------
                    support problems communicated by the Company in accordance
                    ----------------
                    with SCGroup's established reporting process shall be
                    acknowledged by SCGroup (via telephone, voice mail or email)
                    and assigned an initial prioritization level by the end of
                    the business day after the business day on which such
                    problems are reported 90% of the time.

               (3)  MIS application project requests communicated by the Company
                    --------------------------------
                    in accordance with SCGroup's established reporting process
                    shall be acknowledged by SCGroup (via telephone, voice mail
                    or email) and assigned an initial prioritization level by
                    the end of the business day after the business day on which
                    such requests are made 90% of the time.
<PAGE>

               (4)  SCGroup shall complete and submit estimates in response to
                    critical (Severity 1) MIS application project requests
                                          --------------------------------
                    communicated by the Company in accordance with SCGroup's
                    established reporting process by the end of the fifth
                    business day after the business day on which such requests
                    are made 90% of the time.

               (5)  SCGroup shall complete and submit estimates in response to
                    non-critical (Severity 2-4) MIS application project requests
                                                --------------------------------
                    communicated by the Company in accordance with SCGroup's
                    established reporting process by the end of the tenth
                    business day after the business day on which such requests
                    are made 90% of the time.

               For purposes of Service Levels 2.5 (1) through (5), the following
               severity definitions shall be applied:

               Severity 1 - Critical:  Business process has stopped.
               Severity 2 - High:  Business process hindered; a work-around
               exists but requires a substantial amount of work.
               Severity 3 - Normal:  Annoyance; a work-around exists; nominal or
               no extra work required.
               Severity 4 - Hold:  Problem is in a `wait' status.

          2.6  Payroll

               SCGroup shall provide payroll services in accordance with the
               following service levels:

               (1)  SCGroup shall prepare payroll checks in accordance with the
                    applicable monthly or biweekly schedule for payroll
                    processing 99% of the time, provided SCGroup receives
                    accurate, timely and properly approved time sheets and
                    Personnel Action Forms from the Company for the employees in
                    question.

               (2)  SCGroup shall deliver payroll checks on a timely basis to
                    the last known place of business of the employees in
                    question and such checks shall accurately reflect the
                    approved gross to net payroll calculations from such
                    employees 99% of the time.

          2.7  Property Tax Appeals (NOT APPLICABLE)
<PAGE>

          2.8  Risk Management

               SCGroup shall process insurance claims 95% of the time by the end
               of the second business day after the business day on which it
               receives notice of such claim from the Company.