Document:

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                                                                  Exhibit 10(q)

                     SENIOR EXECUTIVE RETENTION AGREEMENT

  Agreement between Olin Corporation, a Virginia corporation ("Olin"), and
     (the "Executive"), dated as of     , 1999.

  Olin and the Executive agree as follows:

  1. Definitions. As used in this Agreement:

    (a) "Brass" means the Brass division of Olin as operated on the date
  hereof with such modifications thereto as are made in the ordinary course
  of business.

    (b) "Cause" means the willful and continued failure of the Executive to
  substantially perform his duties; the willful engaging by the Executive in
  gross misconduct significantly and demonstrably financially injurious to
  the employer, or willful misconduct by the Executive in the course of his
  employment which is a felony or fraud. No act or failure to act on the part
  of the Executive will be considered "willful" unless done or omitted not in
  good faith and without reasonable belief that the action or omission was in
  the interests of the employer or not opposed to the interests of the
  employer.

    (c) "Chlor Alkali" means the Chlor Alkali Products division of Olin as
  operated on the date hereof with such modifications thereto as are made in
  the ordinary course of business.

    (d) "Compete" means that the Executive becomes an owner, employee,
  officer, director, partner or consultant of a business that competes with
  the business of Olin, or any division or subsidiary of Olin, by selling,
  offering to sell, or producing any product substantially similar to those
  then sold or produced by Olin or any such division or subsidiary; provided
  that the Executive shall not be deemed to Compete solely by virtue of
  ownership of less than one percent of the outstanding securities of a
  company whose stock is traded on a national securities exchange or by the
  National Association of Securities Dealers Automated Quotation System.

    (e) "Division Disposition" means:

      (i) Any direct or indirect sale or other disposition of all or
    substantially all of the business or assets of Chlor Alkali or Brass,
    or both, in one or more transactions, to any person, partnership, joint
    venture, corporation or other entity other than Olin, or a direct or
    indirect majority-owned subsidiary of Olin; or

      (ii) Any transaction by which Olin ceases to be the beneficial owner
    of a majority of the capital stock or other equity interests in any
    subsidiary corporation or other entity to which all or substantially
    all of the assets or business of Chlor Alkali or Brass or both have
    been transferred.

    (f) "Employment Term" means the period beginning on the date of this
  Agreement and ending on December 31, 2001.

    (g) "Good Reason" means that:

        (1) The employer reduces the Executive's total direct compensation
      ( i.e., the sum of base salary, the standard annual award under
      short-term annual incentive compensation plans or programs and
      standard awards under long-term incentive compensation plans or
      programs) from the levels in effect on the date of this Agreement
      other than a reduction due solely to the employer's financial
      performance provided such performance is a relevant criterion under
      such plan;

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        (2) The Executive's duties, position or reporting responsibilities
      are diminished, provided that a reduction in the scale of the
      Executive's duties solely as an effect of a Division Disposition or
      the reasonable addition of executive responsibilities as a result of
      realignment of duties shall not constitute Good Reason;

        (3) The employer fails to substantially maintain benefit plans as
      Olin's are in effect on the date of this Agreement, unless
      reasonably equivalent arrangements (embodied in an on-going
      substitute or alternative plan) have been made with respect to such
      plans; or

        (4) The employer requires the Executive to relocate the
      Executive's then office to an area which is not within reasonable
      commuting distance (i.e. no more than 50 miles one way), on a daily
      basis, from the Executive's then residence.

    (h) "Net After Tax Benefit" means the sum of (i) the total amounts
  payable to the Executive under this Agreement, plus (ii) all other payments
  and benefits which the Executive receives or is entitled to receive from
  Olin that would constitute a Parachute Payment, less (iii) the amount of
  federal income taxes payable with respect to the foregoing calculated at
  the maximum marginal income tax rate in effect for the year in which the
  foregoing shall be paid to the Executive, less (iv) the amount of excise
  taxes imposed with respect to the payments and benefits described in (i)
  and (ii) above by Section 4999 of the Internal Revenue Code of 1986, as
  amended.

    (i) "Parachute Payment" means any payment deemed to constitute a
  "parachute payment" as defined in Section 280G of the Internal Revenue Code
  of 1986, as amended.

    (j) "Retention Factor" means a number equal to the number of months
  remaining in the Employment Term at the time of a termination described in
  Section 4, rounded up to the nearest whole month.

    (k) "Retention Payment" means an amount equal to the Retention Factor,
  multiplied by the sum of: (i) the Executive's monthly salary in effect
  immediately prior to the termination; plus (ii) an amount equal to one-
  twelfth of the higher of (A) Executive's standard annual award under Olin's
  short-term annual incentive compensation plans or programs at the time of
  the termination, or (B) the Executive's average annual award actually paid
  under Olin's short-term annual incentive compensation plans or programs
  (including zero if nothing was paid or deferred, but including any portion
  the Executive elected to defer) for the three calendar years immediately
  preceding the termination referred to in Section 4.

    (l) "Tier 1 Executive Agreement" means the Executive Agreement, dated as
  of December 14, 1998, between Olin and the Executive, and any amendment to
  or substitution for such agreement.

  2. Previous Agreement. This Agreement is in addition to and is not intended
to replace or supersede the Tier 1 Executive Agreement, or any successor
agreement, and does not modify or amend the Tier 1 Executive Agreement.

  3. Term. This Agreement expires at the close of business on the earlier of
(i) December 31, 2001, or (ii) a Change in Control as defined in the Tier 1
Executive Agreement provided that if Executive accepts employment with Brass
or Chlor Alkali or a successor entity or one of their affiliates in connection
with a Division Disposition, the Agreement shall continue for a period of
three years after the date Executive begins such new employment. In the event
of the Executive's death while employed by Olin, this Agreement shall
terminate and be of no further force or effect on the date of his or her
death; provided that the Executive's death will not affect any of the
Executive's rights resulting from an event occurring prior to death.

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  4. Retention Payment and Related Benefits. In the event that (i) Olin
terminates the Executive's employment prior to the end of the Employment Term,
other than for Cause or Disability (as defined in the Tier 1 Executive
Agreement); or (ii) the Executive terminates his or her employment with Olin
for Good Reason after giving Olin at least three months' prior written notice:

    (a) Olin will pay the Executive an amount equal to the Retention Payment,
  in equal monthly installments for the remainder of the Employment Term,
  beginning on the first day of the month immediately following the month in
  which the termination occurs;

    (b) Executive will receive service credit under all Olin pension plans
  for which the Executive was eligible at the time of the termination (i.e.,
  under Olin's qualified pension plans to the extent permitted under then
  applicable law; otherwise such credit will be reflected in a supplementary
  payment from Olin under one or more supplementary non-qualified pension
  plans, to be due at the times and in the manner payments are due the
  Executive under such supplementary non-qualified plan(s)) for a number of
  months equal to the Retention Factor (such credit to be in addition to and
  to run consecutively after, rather than concurrently with, any credit under
  the Tier 1 Executive Agreement);

    (c) Executive (including covered dependents) will continue to enjoy
  coverage on the same basis as a similarly situated active employee under
  all Olin medical, dental and life insurance plans to the extent Executive
  was enjoying such coverage immediately prior to the termination, for a
  number of months equal to the Retention Factor, (such coverage to be in
  addition to, and to run consecutively after, rather than concurrently with,
  any coverage under the Tier 1 Executive Agreement) and the Executive's
  entitlement to insurance coverage under the Consolidated Omnibus Budget
  Reconciliation Act would commence at the end of such period, without
  offset;

    (d) All stock options and shares of restricted stock, or other stock-
  based compensation held by Executive immediately prior to the termination
  shall vest effective upon the termination, and the exercise period for all
  such options or other stock-based compensation shall be extended until the
  full term of the relevant award;

    (e) The balance (if any) in the Executive's "EVA Bonus Bank" at the time
  of termination shall be paid in full, or, if a pro rata EVA Plan payout is
  required under that Plan, then as soon as possible thereafter; and

    (f) Any vesting requirements under the Olin Supplemental Contributing
  Employee Ownership Plan shall be deemed satisfied in full.

    (g) Each monthly installment payable for the remainder of the Employment
  Term as provided under Section 4(a) shall be offset by amounts Executive
  received as cash compensation from another "regular job" in the immediately
  preceding month.

  5. Payments Upon Termination by a Division. In the event that, in connection
with a Division Disposition, the Executive accepts employment with, and
becomes employed by, the Division or a successor entity or one of their
affiliates, and within three (3) years thereafter, (a) such new employer
terminates the Executive's employment, other than for Cause or Disability (as
defined in the Tier 1 Executive Agreement); or (b) the Executive terminates
his or her employment with such new employer for Good Reason:

    (a) Olin will pay the Executive an amount equal to the product of: (i)
  the Retention Factor plus twelve, multiplied by (ii) the sum of (A) the
  Executive's monthly salary in effect at the time of the Division
  Disposition; plus (B) one-twelfth of the higher of (I) Executive's standard
  annual award under Olin's short-term annual incentive compensation plans or
  programs at the time of the Division Disposition, or (II) the Executive's
  average annual award actually paid under Olin's short-term annual incentive
  compensation plans or programs (including zero if nothing was paid or
  deferred, but including any portion the Executive elected to defer) for the
  three calendar years

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  immediately preceding the Division Disposition. Such payment shall be made
  in equal monthly installments during the remainder of the Employment Term,
  beginning on the first day of the month immediately following the month in
  which such termination occurs. Such payment shall be reduced by any
  severance, job transition or employment termination payments such Executive
  receives in cash from his or her new employer in connection with the
  termination, and by any cash payments Executive receives under paragraph
  4(f) of the Tier 1 Executive Agreement;

    (b) Executive will receive service credit under all Olin pension plans
  for which the Executive was eligible at the time of the Division
  Disposition (i.e., under Olin's qualified pension plans to the extent
  permitted under then applicable law; otherwise such credit will be
  reflected in a supplementary payment from Olin under one or more
  supplementary non-qualified pension plans, to be due at the times and in
  the manner payments are due the Executive under such supplementary non-
  qualified plan(s)), for a number of months equal to the Retention Factor
  plus twelve (net of any number of months of such credit, if any, that
  Executive receives under the Tier 1 Executive Agreement);

    (c) Executive (including covered dependents) will continue to enjoy
  coverage on the same basis as a similarly situated active employee under
  all Olin medical, dental and life insurance plans to the extent Executive
  was enjoying such coverage immediately prior to the Division Disposition,
  for a number of months equal to the Retention Factor plus twelve, (less the
  number of months, if any, of such coverage that Executive receives under
  the Tier 1 Executive Agreement) and the Executive's entitlement to
  insurance coverage under the Consolidated Omnibus Budget Reconciliation Act
  will commence at the end of such period, without offset; and

    (d) Executive shall be entitled, at Olin's expense, to outplacement
  counseling and associated services in accordance with Olin's customary
  practice at the time with respect to senior executives terminated without
  Cause, but only to the extent Executive does not receive such benefits
  under the Tier 1 Executive Agreement.

    (e) Any amounts payable under Section 5(a) shall be offset by amounts
  Executive receives as cash compensation for full-time employment or full-
  time consulting services.

  6. Limitation on "Parachute" Payments. If any amounts payable to the
Executive pursuant to this Agreement which are deemed by the Executive to
constitute Parachute Payments, when added to any other payments which are
deemed by the Executive to constitute Parachute Payments, would result in the
imposition on the Executive of an excise tax under Section 4999 of the
Internal Revenue Code of 1986, as amended (the "Code"), the amounts payable
under Section 4 or 5, as the case may be, shall be reduced by the smallest
amount necessary to avoid the imposition of such excise tax; but shall be
reduced only if, by reason of such reduction, the Executive's Net After Tax
Benefit shall exceed the Net After Tax Benefit if such reduction were not
made. The foregoing calculations (including any calculations required under
the definition of Net After Tax Benefit) shall be made, at Olin's expense, by
Olin and the Executive. If no agreement on the calculations is reached within
five days after the date of the termination triggering the payment, then the
calculations shall be made, at Olin's expense by a nationally-recognized
accounting firm and outside counsel mutually acceptable to the Executive and
Olin. In the event it becomes necessary to limit any payments under this
Agreement, the Executive's insurance shall be the last payments to be so
limited; any other payments payable under this Agreement shall be payable when
due until the remaining maximum permissible amount has been paid to the
Executive under this Section 6.

  7.  Successors; Offsets; Non-competition; Release.

    (a) Olin will require any successor (whether direct or indirect, by
  purchase, merger, consolidation or otherwise) to all or substantially all
  of the business or assets of Olin, by agreement, in form and substance
  satisfactory to the Executive, expressly to assume and agree to perform
  this Agreement in the same manner and to the same extent that Olin would be
  required

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  to perform if no such succession had taken place. Failure of Olin to obtain
  such assumption and agreement prior to the effectiveness of any such
  succession will be a breach of this Agreement and entitle the Executive to
  compensation from Olin in the same amount and on the same terms as the
  Executive would be entitled to hereunder had a triggering event occurred on
  the succession date. As used in this Agreement, "Olin" means Olin as
  defined in the preamble to this Agreement and any successor to its business
  or assets which executes and delivers this Agreement or which otherwise
  becomes bound by all the terms and provisions of this Agreement by
  operation of law or otherwise.

    (b) This Agreement shall be enforceable by the Executive's personal or
  legal representatives, executors, administrators, successors, heirs,
  distributees, devisees and legatees.

    (c) In the event that, without Olin's consent, which consent will not be
  unreasonably withheld, the Executive Competes during the Employment Term,
  the Executive will forfeit the right to receive amounts due from Olin under
  this Agreement after the date Executive begins to Compete and will forfeit
  any right to continued insurance coverage under this Agreement after such
  date; provided that nothing in this Section shall be deemed to reduce or
  otherwise impair in any manner, Executive's right to receive payments or
  insurance benefits, if any, under any other plan, agreement or arrangement.

    (d) Following termination of Executive's employment, Olin may require
  Executive to release Olin from any and all employment, wrongful termination
  and/or discrimination claims as a condition to making payments under this
  Agreement, any such release to be in substantially the form required of
  other former Olin employees.

    (e) The Executive will not be required to mitigate the amount of any
  payment provided for in this Agreement by seeking other employment or
  otherwise. Nothing in this Agreement, including any offset or similar
  provision will be deemed to reduce or limit the rights which the Executive
  may have under any other employee benefit plan, policy or arrangement of
  Olin.

  8. Notices. For the purpose of this Agreement, notices and all other
communications provided for herein shall be in writing and shall be deemed to
have been duly given when delivered or mailed by United States registered or
certified mail, return receipt requested, postage prepaid, addressed as
follows:

  If to the Executive:

  If to the Company: Olin Corporation
                     501 Merritt 7
                     P.O. Box 4500
                     Norwalk, CT 06856-4500
                     Attention: Corporate Secretary

or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
be effective only upon receipt.

  9. Governing Law. The validity, interpretation, construction and performance
of this Agreement shall be governed by the laws of the State of Connecticut
(without giving effect to its conflicts of law).

  10. Miscellaneous. No provisions of this Agreement may be modified, waived
or discharged unless such modification, waiver or discharge is agreed to in
writing signed by the Executive and Olin. No waiver by either party hereto at
any time of any breach by the other party hereto of, or compliance with, any
condition or provision of this Agreement to be performed by such other party
shall be deemed a waiver of similar or dissimilar provisions or conditions at
the same or at any prior or subsequent time. No agreements or representations,
oral or otherwise, express or implied, with respect to the subject matter
hereof have been made by either party which are not set forth expressly in
this Agreement.

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  11. Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed to be an original but all of which
together will constitute one and the same Agreement.

  12. Withholding of Taxes. Olin may withhold from any benefits payable under
this Agreement all federal, state, city or other taxes as shall be required
pursuant to any law or governmental regulation or ruling.

  13. Non-assignability. This Agreement is personal in nature and neither of
the parties hereto shall, without the consent of the other, assign or transfer
this Agreement or any rights or obligations hereunder, except as provided in
paragraph 7 above or except to any direct or indirect majority owned
subsidiary of Olin. Without limiting the foregoing, the Executive's right to
receive payments hereunder shall not be assignable or transferable, whether by
pledge, creation of a security interest or otherwise, other than a transfer by
his will or by the laws of descent or distribution, and, in the event of any
attempted assignment or transfer by the Executive contrary to this paragraph,
Olin shall have no liability to pay any amount so attempted to be assigned or
transferred.

  14. No Employment Right. This Agreement shall not be deemed to confer on the
Executive a right to continued employment with Olin.

  15. Disputes/Arbitration.

    (a) Any dispute or controversy arising under or in connection with this
  Agreement shall be settled exclusively by arbitration at Olin's corporate
  headquarters in accordance with the rules of the American Arbitration
  Association then in effect. Judgment may be entered on the arbitrator's
  award in any court having jurisdiction; provided, however, that the
  Executive shall be entitled to seek specific performance of the Executive's
  right to be paid during the pendency of any dispute or controversy arising
  under or in connection with this Agreement.

    (b) Olin shall pay all reasonable legal fees and expenses, as they become
  due, which the Executive may incur to enforce this Agreement through
  arbitration or otherwise unless the arbitrator determines that Executive
  had no reasonable basis for his claim. Should Olin dispute the entitlement
  of the Executive to such fees and expenses, the burden of proof shall be on
  Olin to establish that the Executive had no reasonable basis for his claim.

  IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered as of the day and year first above set forth.

                                          Olin Corporation

                                          By:
                                             __________________________________

Accepted and Agreed:

_________________________
Name
Title:<PAGE>

                                                            Exhibit 10.7

                                    FORM OF

                          CHANGE IN CONTROL AGREEMENT

     This Agreement entered into as of the 30th day of November, 1999, by and
between Archstone Communities Trust, a Maryland real estate investment trust
("REIT") (the "Trust"), and [insert name] (the "Executive").
------         -----                            ---------

     WHEREAS the Trust wishes to assure itself of the continuity of the
Executive's services in the event of any change in control of the Trust;

     WHEREAS the Trust and the Executive accordingly desire to enter into this
Agreement on the terms and conditions set forth below;

     NOW, THEREFORE, in consideration of the promises and mutual covenants set
forth herein and other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, it is hereby agreed by and between
the parties as follows:

     1.   Term of Agreement. The term of this Agreement (the "Term") shall
          -----------------                                   ----
commence on the date hereof and shall continue through December 31, 2000;
provided, however, that on such date and on each December 31 thereafter, the
term of this Agreement shall automatically be extended for one additional year
unless, not later than sixty (60) days prior to December 31 either party shall
have given notice that such party does not wish to extend the Term; and
provided, further, that if a Change in Control (as defined in Paragraph 3 below)
shall have occurred during the original or any extended Term of this Agreement,
the Term of this Agreement shall continue for a period of [insert thirty-six for
Tier 1, or twenty-four for Tier 2] calendar months beyond the calendar month in
which such Change in Control occurs.

     2.   Employment After Change in Control. If the Executive is in the employ
          ----------------------------------
of the Trust on the date of a Change in Control, the Trust hereby agrees to
continue Executive in its employ for the period commencing on the date of the
Change in Control and ending on the last day of the Term of this Agreement (the
"Employment Period"). During the Employment Period, the Executive shall hold
such position with the Trust and exercise such authority and perform such duties
as are substantially commensurate with the Executive's position, authority and
duties immediately prior to the Change in Control. The Executive agrees that,
during the Employment Period, the Executive shall devote his full professional
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time and attention to the Executive's duties and perform such duties faithfully
and efficiently; provided, however, that nothing in this Agreement shall prevent
the Executive from voluntarily resigning from employment upon 30 days' written
notice to the Trust under circumstances which do not constitute a Termination
(as defined in Paragraph 5 below).
<PAGE>

     3.   Change in Control. For purposes of this Agreement, "Change in Control"
          -----------------                                   -----------------
means the occurrence of any of the following:

          a.   the shareholders of the Trust approve a definitive agreement to
merge the Trust into or consolidate the Trust with another entity, sell or
otherwise dispose of all or substantially all of its assets, or adopt a plan of
liquidation. However, a Change in Control shall not be deemed to have occurred
by reason of a transaction (or a substantially concurrent or otherwise related
series of transactions) (a "Transaction") upon the completion of which 75% or
                            -----------
more of the beneficial ownership of the voting power of the Trust, the surviving
corporation or corporation directly or indirectly controlling the Trust or the
surviving corporation, as the case may be, is held by the same persons (although
not necessarily in the same proportion) as held the beneficial ownership of the
voting power of the Trust immediately prior to the Transaction (except that upon
the completion thereof, employees or employee benefit plans of the Trust may be
a new holder of such beneficial ownership); provided, however, that in the event
that the shareholders of the Trust immediately prior to the consummation of a
Transaction beneficially own (not giving effect to any shares beneficially owned
by such persons in any party to the Transaction other than the Trust) less than
75% of the voting power of the Trust, the surviving corporation or corporation
directly or indirectly controlling the Trust or the surviving corporation, as
the case may be, immediately after the consummation of the Transaction, then a
Change in Control shall be deemed to have occurred. A transaction with an
"Affiliate" of the Trust (as defined in the Securities Exchange Act of 1934, as
 ---------
amended (the "Exchange Act")) shall not be treated as a Change in Control; or,
              ------------

          b.   the "beneficial ownership" (as defined in Rule 13(d)(3) under the
                    --------------------
Exchange Act) of securities representing 25% or more of the combined voting
power of the Trust is acquired, other than from the Trust, by any "person" as
defined in Sections 13(d) and 14(d) of the Exchange Act (other than by any
trustee or other fiduciary holding securities under an employee benefit plan or
other similar stock plan of the Trust), provided that any purchase by Security
Capital Group Incorporated or any of its Affiliates of securities representing
50% or more of the combined voting power of the Trust shall not be treated as a
Change in Control; or

          c.   at any time during any period of two consecutive years,
individuals who at the beginning of such period were members of the Board of
Trustees of the Trust cease for any reason to constitute at least a majority
thereof (unless the election, or the nomination for election by the Trust's
shareholders, of each new Trustee was approved by a vote of at least two-thirds
of the Trustees still in office at the time of such election or nomination who
were trustees at the beginning of such period).

     4.   Compensation During the Employment Period. During the Employment
          -----------------------------------------
Period, the Executive shall be compensated as follows:

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<PAGE>

          a.   The Executive shall receive an annual salary which is not less
than his annual salary immediately prior to the Employment Period and shall be
eligible to receive an increase in annual salary which is not materially less
favorable than the average increases in salary for the Trust's other executives
with comparable duties and responsibilities;

          b.   the Executive shall be eligible to participate in short-term and
long-term cash-based incentive compensation plans which, in the aggregate,
provide bonus opportunities which are not materially less favorable to the
Executive than the greater of (i) the opportunities provided to the Trust's
other executives with comparable duties and responsibilities; and, (ii) the
opportunities provided to the Executive under all such plans in which the
Executive was participating prior to the Employment Period;

          c.   the Executive shall be eligible to participate in stock option,
performance awards, restricted stock and other equity-based incentive
compensation plans (the "Plans") on a basis not materially less favorable to the
                         -----
Executive than the greater of the Plans available (i) to the Executive
immediately prior to the Employment Period, or (ii) to other executives of the
Trust with comparable duties and responsibilities; and,

          d.   the Executive shall be eligible to receive employee benefits
(including, but not limited to, tax-qualified and nonqualified savings plan
benefits, medical insurance, disability income protection, life insurance
coverage and death benefits) and perquisites which are not materially less
favorable to the Executive than the greater of (i) the employee benefits and
perquisites provided to the Trust's other executives with comparable duties and
responsibilities, or (ii) the employee benefits and perquisites to which the
Executive would be entitled under the Trust's employee benefit plans and
perquisites as in effect immediately prior to the Employment Period.

     5.   Termination. For purposes of this Agreement, the term "Termination"
          -----------                                             -----------
shall mean termination of the employment of the Executive during the Employment
Period (i) by the Trust, for any reason other than death, Disability (as defined
below) or Cause (as described below), or (ii) by resignation of the Executive
upon the occurrence of one of the following events:

          a.   a material adverse change in the nature or scope of the
Executive's [title], position, authority or duties, a breach of any of the
subparagraphs of Paragraph 4 above, or the breach by the Trust of any other
provision of this Agreement;

          b.   a material reduction in the base salary and/or target bonus
received by the Executive;

                                       3
<PAGE>

          c.   the relocation of the Executive's office to a location more than
thirty miles from the location of the Executive's office immediately prior to
the Employment Period;

          d.   the failure of the Trust to obtain a satisfactory agreement from
any successor to assume and agree to perform this Agreement, as contemplated in
Paragraph 19 below.

   The date of the Executive's Termination under this Paragraph 5 shall be the
date specified by the Executive or the Trust, as the case may be, in a written
notice to the other party complying with the requirements of Paragraph 15 below.
For purposes of this Agreement, the Executive shall be considered to have a
"Disability" during the period in which the Executive is unable, by reason of a
 ----------
medically determinable physical or mental impairment, to engage in the material
and substantial duties of his regular occupation, which condition is expected to
be permanent.  For purposes of this Agreement, "Cause" means, in the reasonable
                                                -----
judgment of the Board of Trustees of the Trust, (i) the willful and continued
failure by the Executive to substantially perform the Executive's duties with
the Trust, after written notification by the Trust of such failure, (ii) the
willful engaging by the Executive in conduct which is demonstrably injurious to
the Trust, monetarily or otherwise, or (iii) the engaging by Executive in
egregious misconduct involving serious moral turpitude.  For purposes of this
Agreement, no act, or failure to act, on the Executive's part shall be deemed
"willful" unless done, or omitted to be done, by the Executive not in good faith
and without reasonable belief that such action was in the best interest of the
Trust.

     6.   Severance Payments. Subject to the provisions of Paragraph 9 below, in
          ------------------
the event of a Termination described in Paragraph 5 above, in lieu of the amount
otherwise payable under Paragraph 4 above, the Executive shall continue to
receive, at the Trust's expense, medical insurance, disability income
protection, life insurance coverage and death benefits, and perquisites in
accordance with Subparagraph 4(d) above for a period of [insert thirty-six
months for Tier 1, or twenty-four months for Tier 2] after the date of
Termination (under COBRA or through an individual conversion policy, as
appropriate), and shall be entitled to a lump sum payment in cash no later than
ten (10) business days after the date of Termination equal to the sum of:

          a.   the Executive's unpaid salary, accrued vacation pay and
unreimbursed business expenses through and including the date of Termination;

          b.   an amount equal to [insert 3 for Tier 1, or 2 for Tier 2] times
the Executive's annual salary rate plus an amount equal to [insert 3 for Tier 1,
or 2 for Tier 2] times the Executive's target bonus award in effect immediately
prior to the date of Termination.

                                       4
<PAGE>

          c.   an amount equal to the assigned target bonus for the Executive
for the year of Termination prorated through the date of Termination.

     7.   Deferred Compensation Plans.
          ---------------------------

          a.   For purposes of this Paragraph, "deferred compensation plans"
                                                -------- ------------ -----
shall mean all nonqualified deferred compensation plans presently maintained by
the Trust or adopted in the future by the Trust, including without limitation
the Archstone Communities Trust Nonqualified Savings Plan. If a Change in
Control occurs during the original or any extended Term of this Agreement, the
Trust shall, within thirty (30) days after the date of such Change in Control,
establish a "rabbi trust" and transfer to such "rabbi trust" an amount of cash
sufficient to provide all benefits accrued by the Executive under all deferred
compensation plans. Thereafter, the Trust will, at least quarterly, transfer to
the "rabbi trust" an amount of cash sufficient to provide any additional
benefits accrued by the Executive under all deferred compensation plans.

          b.   In the event of a Termination as set forth in Paragraph 5 above
(and only in the event of such Termination): any election by the Executive as to
the form of payment of benefits under the Archstone Communities Trust
Nonqualified Savings Plan that is made within thirty (30) days after the date of
Change in Control, and before the Executive is entitled to such benefits, will
be given effect, whether or not such election was on file at least twelve (12)
months prior to such Termination.

     8.   Share Awards. In the event of a Termination as set forth in Paragraph
          ------------
5 above, the restrictions on any outstanding share awards (including
nonqualified options, incentive share options, matching share options, purchased
shares and restricted share units) granted to Executive under any incentive plan
or arrangement shall lapse and such share awards shall become 100% vested, and
all other awards granted to Executive shall become immediately exercisable and
shall become 100% vested. The expiration date of Executive's share options shall
be the three-month anniversary of the date of the Termination as set forth in
Paragraph 5 above.

     9.   Make-Whole Payments.  Subject to the following three sentences, if any
          -------------------
payment or benefit to which the Executive is entitled, whether under this
Agreement or otherwise, in connection with a Change in Control or the
Executive's termination of employment (a "Payment") is subject to any tax under
                                          -------
section 4999 of the Internal Revenue Code of 1986, as amended (the "Code"), or
                                                                    ----
any similar federal or state law (an "Excise Tax"), the Trust shall pay to the
                                      ----------
Executive an additional amount (the "Make Whole-Amount") which is equal to (i)
                                     -----------------
the amount of the Excise Tax, plus (ii) the aggregate amount of any interest,
penalties, fines or additions to any tax that are imposed in connections with
such Excise Tax, plus (iii) all income, excise and other applicable taxes
imposed on the Executive under the laws of any Federal, state or local

                                       5
<PAGE>

government or taxing authority by reason of the payments required under clause
(i) and clause (ii) and this clause (iii).  Such Make Whole-Amount will not be
paid to the Executive if the Payment is less than ten (10) percent above the
maximum amount that may be paid without incurring Excise Tax.  In the event that
the Payment is greater than the maximum amount that may be paid without
incurring Excise Tax, but less than 10 percent greater than the maximum amount,
then the Payment shall be capped at the maximum amount that may be paid without
incurring Excise Tax.  In such event, the cash severance payments provided in
Paragraph 6 above and/or the outplacement services provided in Paragraph 10
below, at the Executive's election, shall be reduced to a level that results in
the total Payment being equal to the maximum amount that may be paid without
incurring Excise Tax.

          a.   For purposes of determining the Make-Whole Amount, the Executive
shall be deemed to be taxed at the highest marginal rate under all applicable
local, state, federal and foreign income tax laws for the year in which the
Make-Whole Amount is paid. The Make-Whole Amount payable with respect to an
Excise Tax shall be paid by the Trust coincident with the Payment with respect
to which such Excise Tax relates.

          b.   All calculations under this Paragraph 9 shall be made initially
by the Trust and the Trust shall provide prompt written notice thereof to the
Executive to enable the Executive to timely file all applicable tax returns.
Upon request of the Executive, the Trust shall provide the Executive with
sufficient tax and compensation data to enable the Executive or his tax advisor
to independently make the calculations described in subparagraph (a) above and
the Trust shall reimburse the Executive for reasonable fees and expenses
incurred for any such verification.

          c.   If the Executive gives written notice to the Trust of any
objection to the results of the Trust's calculations within sixty (60) days of
the Executive's receipt of written notice thereof, the dispute shall be referred
for determination to tax counsel selected by the independent auditors of the
Trust ("Tax Counsel"). The Trust shall pay all reasonable fees and expenses of
        -----------
such Tax Counsel. Pending such determination by Tax Counsel, the Trust shall pay
the Executive the Make-Whole Amount as determined by the Trust in good faith.
The Trust shall pay the Executive any additional amount determined by Tax
Counsel to be due under this Paragraph 9 (together with interest thereon at a
rate equal to 120% of the Federal short-term rate compounded daily determined
under section 1274(d) of the Code) promptly after such determination.

          d.   The determination by Tax Counsel shall be conclusive and binding
upon all parties unless the Internal Revenue Service, a court of competent
jurisdiction, or such other duly empowered governmental body or agency (a "Tax
                                                                           ---
Authority") determines that the Executive owes a greater or lesser amount of
---------
Excise Tax with respect to any Payment than the amount determined by Tax
Counsel.

                                       6
<PAGE>

          e.   If a Taxing Authority makes a claim against the Executive which,
if successful, would require the Trust to make a payment under this Paragraph 9,
the Executive agrees to contest the claim, with counsel reasonably satisfactory
to the Trust, on request of the Trust, subject to the following conditions:

               (1)  The Executive shall notify the Trust of any such claim
within ten (10) days of becoming aware thereof. In the event that the Trust
desires the claim to be contested, it shall promptly (but in no event more than
thirty (30) days after the notice from the Executive or such shorter time as the
Taxing Authority may specify for responding to such claim) request the Executive
to contest the claim. The Executive shall not make any payment of any tax which
is subject of the claim before the Executive has given the notice or during the
thirty (30) day period thereafter unless the Executive receives written
instructions from the Trust to make such payment together with an advance of
funds sufficient to make the requested payment plus any amounts payable under
this Paragraph 9 determined as if such advance were an Excise Tax, in which case
the Executive will act promptly in accordance with such instructions.

               (2)  If the Trust so requests, the Executive will contest the
claim by either contesting the claim in the United States Tax Court or other
appropriate court, as directed by the Trust; provided, however, that any request
by the Trust for the Executive to pay the tax shall be accompanied by an advance
from the Trust to the Executive of funds sufficient to make the requested
payment plus any amounts payable under this Paragraph 9 determined as if such
advance were an Excise Tax. If directed by the Trust in writing, the Executive
will take all action necessary to compromise or settle the claim, but in no
event will the Executive compromise or settle the claim or cease to contest the
claim without the written consent of the Trust; provided, however, that the
Executive may take any such action if the Executive waives in writing his right
to a payment under this Paragraph 9 for any amounts payable in connection with
such claim. The Executive agrees to cooperate in good faith with the Trust in
contesting the claim and to comply with any reasonable request from the Trust
concerning the contest of the claim, including the pursuit of administrative
remedies, the appropriate forum for any judicial proceedings, and the legal
basis for contesting the claim. Upon request of the Trust, the Executive shall
take appropriate appeals of any judgment or decision that would require the
Trust to make a payment under this Paragraph 9. Provided that the Executive is
in compliance with the provisions of this paragraph, the Trust shall be liable
for and indemnify the Executive against any loss in connection with, and all
costs and expenses, including attorneys' fees, which may be incurred as a result
of, contesting the claim, and shall provide to the Executive, within ten (10)
days after each written request therefor by the Executive, cash advances or
reimbursement for all such costs and expenses actually incurred or reasonably
expected to be incurred by the Executive as a result of contesting the claim.

                                       7
<PAGE>

               f.   Should a Tax Authority finally determine that an additional
Excise Tax is owed, then the Trust shall pay an additional Make-Whole Amount to
the Executive in a manner consistent with this Paragraph 9 with respect to any
additional Excise Tax and any assessed interest, fines, or penalties. If any
Excise Tax as calculated by the Trust or Tax Counsel, as the case may be, is
finally determined by a Tax Authority to exceed the amount required to be paid
under applicable law, then the Executive shall repay such excess to the Trust
within thirty (30) days of such determination; provided that such repayment
shall be reduced by the amount of any taxes paid by the Executive on such excess
which is not offset by the tax benefit attributable to the repayment.

          10.  Outplacement Services. If the Executive's Termination occurs
               ---------------------
during the Employment Period, the Trust shall provide to the Executive, at the
Executive's election, outplacement services of an experienced firm, selected by
the Trust and acceptable to the Executive, located not more than thirty miles
from the location of Executive's office immediately prior to the Employment
Period, provided that the cost of such services shall not exceed [insert $20,000
for Tier 1, or $15,000 for Tier 2] and such services shall not extend beyond six
(6) months from the date of Executive's Termination.

          11.  Pooling of Interests Accounting Treatment. If the application of
               -----------------------------------------
any provision of this Agreement, or of the Agreement in its entirety, would
preclude the use of pooling of interests accounting treatment with respect to a
transaction for which such treatment otherwise is available and to be adopted by
the Trust, this Agreement, upon the determination of the Board, shall be
modified as it applies to such transaction, to the minimum extent necessary to
prevent such impact and preserving to the greatest extent possible the
protections and rights afforded the Executive under this Agreement.

          12.  Deductions and Withholding.  All payments to the Executive under
               --------------------------
this Agreement will be subject to applicable deductions and withholding of state
and federal taxes.

          13.  Confidentiality, Non-Solicitation and Non-Competition.  The
               -----------------------------------------------------
Executive agrees that:

               a.   Except as may be required by the lawful order of a court or
agency of competent jurisdiction, or except to the extent that the Executive has
the express written authorization from the Trust, the Executive agrees to keep
secret and confidential for a period of two years following the termination of
Executive's employment all non-public information concerning the Trust or any
entity in which the Trust has a 25% or greater ownership interest ("Trust-
                                                                    -----
Related Entity") which was acquired by or disclosed to Executive during the
--------------
course of Executive's employment with the Trust or any Trust-Related Entity
controlled by the Trust, and not to disclose the same, either directly or
indirectly, to any other person, firm or business entity or to use it in any
way.

                                       8
<PAGE>

               b.   While the Executive is employed by the Trust or Trust-
Related Entity and for a period of one year after the date the Executive
terminates employment for any reason, the Executive covenants and agrees that
Executive will not, whether for Executive or for any other person, business,
partnership, association, firm, company or corporation, initiate contact with,
solicit, divert or take away any of the customers (entities or individuals from
which the Trust or any Trust-Related Entity receives rents or payments for
services) of the Trust or any Trust-Related Entity or employees of the Trust or
any Trust-Related Entity in existence from time to time during Executive's
employment with the Trust or any Trust-Related Entity and at the time of such
initiation, solicitation or diversion.

               c.   While the Executive is employed by the Trust or any Trust-
Related Entity, the Executive covenants and agrees that Executive will not,
directly or indirectly, engage in, assist, perform services for, plan for,
establish or open, or have any financial interest (other than (i) ownership of
1% or less of the outstanding stock of any corporation listed on the New York or
American Stock Exchange or included in the National Association of Securities
Dealers Automated Quotation System, or (ii) ownership of securities in any
entity affiliated with the Trust) in any person, firm, corporation, or business
entity (whether as an employee, officer, director or consultant) that engages in
the operation, development, management or financing of multifamily communities.

          14.  Arbitration of All Disputes.  Any controversy or claim arising
               ---------------------------
out of or relating to this Agreement or the breach thereof shall be settled by
arbitration in Denver, Colorado, in accordance with the laws of the State of
Colorado.  The arbitration shall be conducted in accordance with the rules of
the American Arbitration Association.  Judgment upon the award rendered by the
arbitrator may be entered in any court having jurisdiction thereof.  In the
event that the Executive determines that it is either necessary or desirable for
the Executive to retain legal counsel or incur other costs and expenses in
connection with enforcement of his or her rights under this Agreement, the Trust
shall pay the Executive's reasonable attorneys' fees and costs and expenses in
connection with enforcement of his or her rights (including the enforcement of
any arbitration award in court).  If, however, the arbitrator shall determine
that, under the circumstances, payment by the Trust of all or any part of any
such fees, costs and expenses would be unjust, the Executive shall repay such
amount to the Trust in accordance with the order of the arbitrator.  Any award
of the arbitrator shall include interest at a rate or rates considered just
under the circumstances by the arbitrator.

          15.  Mitigation and Set-Off.  The Executive shall not be required to
               ----------------------
mitigate the amount of any payment provided for in this Agreement by seeking
other employment or otherwise.  The Trust shall not be entitled to set-off
against the amounts payable to the Executive under this Agreement any amounts
owed to the Trust by the Executive, or any amounts earned, or which

                                       9
<PAGE>

could have been earned, by the Executive after the date of Termination of
Executive's employment with the Trust.

          16.  Notices.  Except as otherwise provided herein, either the Trust
               -------
or the Executive may terminate the employment relationship upon no less than
thirty (30) days' notice to the other party.  Any notices, requests, demands or
other communications provided for by this Agreement shall be sufficient if in
writing and if sent by telecopy or facsimile transmission or by hand delivery or
registered, certified, or overnight mail to the Executive at the last address
Executive has filed in writing with the Trust or, in the case of the Trust, to
the attention of the Secretary of the Trust, at its principal executive offices.
Such notices and communications shall be deemed to have been received on the
date of confirmation of receipt, in the case of telecopy or facsimile
transmission, or upon the date of delivery thereof or the fifth (5/th/) business
day after the mailing thereof, whichever is earlier, in the case of the
remaining delivery methods.

          17.  Binding Effect; Assignment.  This Agreement shall inure to the
               --------------------------
benefit of, and shall be binding upon, the parties hereto and their respective
successors, assigns, heirs, and legal representatives.  This Agreement may not
be assigned by Executive, nor may Executive assign or pledge any of his rights,
including rights to payment, hereunder.

          18.  Governing Law. The provisions of this Agreement shall be
               -------------
construed in accordance with the laws of the State of Colorado, without
application of conflict of laws provisions thereunder.

          19.  Successors to the Trust.  The Trust shall require any successor,
               -----------------------
whether direct or indirect, by purchase, merger, consolidation or otherwise, and
whether to all or substantially all of the business and/or assets of the Trust,
to assume the obligations of this Agreement.  Such assumption shall be by an
express agreement signed by both the successor Company and the Executive and
shall be reasonably satisfactory to the Executive.

          20.   Employment Status.  Nothing in this Agreement shall be deemed to
                -----------------
create an employment agreement between the Trust and the Executive providing for
the employment of the Executive for any fixed period of time.  The Executive's
employment is terminable at will by the Trust of the Executive, meaning either
party may terminate the employment relationship at any time, with or without
Cause, subject in the event of a Termination, as defined in this Agreement, to
(i) the notice provisions of Paragraph 2, 5, and 16, and (ii) the Trust's
obligations to provide severance payments as required by Paragraph 6, the
election rights of the Executive set forth in Paragraph 7(b) and the
modifications to any outstanding awards set forth in Paragraph 8. Upon
termination of the Executive's employment prior to the date of a Change in
Control, there shall be no further rights under this Agreement.

                                       10
<PAGE>

          21.  Entire Agreement.  This Agreement, contains the entire agreement
               ----------------
between the parties hereto and supersedes all prior agreements and
understandings, oral or written, between the parties hereto with respect to the
subject matter hereof, except with respect to the Archstone Communities Trust
1997 Long-Term Incentive Plan, which, subject to the modifications thereto set
forth in this Agreement, remains as a separate document in full force and effect
in accordance with its terms.

          22.  Amendments and Waivers.  This Agreement may not be modified or
               ----------------------
amended except by an instrument or instruments in writing signed by the party
against whom enforcement or any such modification or amendment is sought.
Either party hereto may, by an instrument in writing, waive compliance by the
other party with any term or provision of this Agreement on the part of such
other party hereto to be performed or complied with.  The waiver by any party
hereto of a breach of any term or provision of this Agreement shall not be
construed as a waiver of any subsequent breach.

          23.  Section Headings.  The headings contained in this Agreement are
               ----------------
for reference purposes only and shall not be deemed to be a part of this
Agreement or to control or affect the meaning or construction of any provision
of this Agreement.

          24.  Severability.  In the event that any provision or portion of this
               ------------
Agreement shall be determined to be invalid or unenforceable for any reason, the
remaining provisions of this Agreement shall be unaffected thereby and shall
remain in full force and effect.

          25.  Counterparts.  This Agreement may be executed in two or more
               ------------
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one and the same agreement.

                       [Signatures are on following page]

                                       11
<PAGE>

                               SIGNATURE PAGE TO

                          CHANGE IN CONTROL AGREEMENT

     IN WITNESS WHEREOF, the Executive has hereunto set his hand and, pursuant
to the authorization from its Board of Trustees, the Trust has caused these
presents to be executed in its name and on its behalf, all as of the day and
year first above written.

                                           ____________________________________

                                                  [Insert name]

                                                  [Insert title]

                                            ARCHSTONE COMMUNITIES TRUST

                                            By: _______________________________

                                            Name:  ____________________________

                                            Title: ____________________________

                                       12
<PAGE>

                    SCHEDULE TO CHANGE IN CONTROL AGREEMENT
                    ---------------------------------------

The following persons have executed Change in Control Agreements with Archstone,
which Agreements are in the same form as is set forth in Exhibit 10.7, with the
only differences being those provisions noted in such form which vary based upon
whether the individual is a Tier 1 Executive or a Tier 2 Executive.

TIER 1 EXECUTIVES: R. Scot Sellers, Chairman and Chief Executive Officer, and
Patrick  R. Whelan, Chief Operating Officer.

TIER 2 EXECUTIVES: Richard A. Banks, Managing Director West Region, and J.
Lindsay Freeman, Managing Director East Region are Tier 2 Executives for
purposes of the Change in Control Agreements.

                                       13

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