Document:

exv10w1

 

Exhibit
10.1

PURCHASE AGREEMENT

     THIS PURCHASE AGREEMENT (“Agreement”) is made as of June 17, 2005, by and between OPUS REAL
ESTATE VIRGINIA III, L.L.C., a Delaware limited liability company (“Seller”), and CARR CAPITAL
CORPORATION, a District of Columbia corporation (“Purchaser”).

     In consideration of this Agreement, Seller and Purchaser agree as follows:

     1. Sale of Subject Property. Seller agrees to sell to Purchaser the property described below
(collectively, the “Subject Property”), and Purchaser agrees to buy from Seller the Subject
Property, upon and subject to the conditions and limitations herein contained:

          (a) Real Property. Fee simple interest in that certain parcel of real estate in Fairfax
County, Virginia, commonly known as Opus at Westfields (the “Subject Property”), legally described
on Exhibit A attached hereto and made a part hereof (the “Land”), together with (i) all
building structures, improvements and fixtures owned by Seller located on the Land (the
“Improvements”), and (ii) all rights, privileges, servitudes, easements and appurtenances thereunto
belonging or appertaining (collectively, the “Real Property”).

          (b) Personal Property and Intangibles. All of the equipment and personal property, including
without limitation, any maintenance equipment, tools, signs, supplies, appliances, security
systems, decorations, furniture, furnishings, machinery and landscaping, owned by Seller located at
or installed on the Real Property and used solely in the operation of the Real Property, if any,
and the right to use the name of the Subject Property and other business or trade names associated
with the Subject Property (excluding any names containing the name “Opus”) to the extent the same
are assignable (collectively, “Personal Property”).

          (c) Lease. Seller’s interest as lessor in and to the lease described on Exhibit B
attached hereto and made a part hereof, together with all amendments or modifications thereto, if
any (collectively the “Lease”) and any guaranties or other security applicable thereto and all
security deposits, advance rental or like payments, if any, held by Seller in connection with the
Lease.

          (d) Permits. Seller’s interest in and to the licenses, permits, authorizations, certificates
of occupancy and governmental approvals described on Exhibit C attached hereto and made a
part hereof, to the extent the same are assignable (“Permits”).

          (e) Service Contracts. Seller’s interest in and to the existing service and maintenance
contracts together with any amendments or modifications thereto, if any, described on Exhibit
D attached hereto and made a part hereof (“Service Contracts”) to the extent they are
assignable. On or before the Contingency Date (as herein defined) Purchaser shall advise Seller,
in writing, of any Service Contracts that Purchaser does not desire to be assigned to and assumed
by Purchaser at Closing (as herein defined), and any such Service Contracts shall be terminated
prior to Closing if such contracts are terminable at no cost to Seller and, provided that Seller
has reasonably sufficient notice to allow for timely termination of such Service Contracts.
Failure by Purchaser to notify Seller prior to the Contingency Date shall constitute an election by
Purchaser to have all of the Service Contracts assigned to and assumed by Purchaser.

          (f) Warranties. Seller’s interest in and to all unexpired warranties and guaranties given or
assigned to or benefiting Seller, the Real Property or the Personal Property regarding the

 

 

acquisition, construction, design, use, operation, management or maintenance of the Real
Property or Personal Property that are described on Exhibit E attached hereto and made a
part hereof (“Warranties”), to the extent the same are in Seller’s possession and assignable
without cost to Seller; provided, however, it is understood that Seller is not assigning, and the
Subject Property does not consist of, Seller’s interest in any construction contract between Seller
and any Opus related entity.

          (g) Plans. A limited license, as hereinafter described, to review and use a copy of the final
plans and specifications (excluding shop drawings) relating to the construction of the Improvements
in Seller’s possession (“Plans”); provided, however, neither Purchaser nor its successors or
assigns may use the Plans for any purpose other than the repair, maintenance or restoration of the
Improvements without the prior written consent of Seller, and Purchaser hereby agrees to indemnify,
defend and hold harmless Seller and its affiliates from and against any unauthorized use of the
Plans, which obligation shall survive Closing. Seller reserves the right to use the Plans for any
purpose.

     2. Purchase Price. Purchaser shall pay to Seller, as consideration for the purchase of the
Subject Property, the sum (“Purchase Price”) of TWENTY-FOUR MILLION ONE HUNDRED FIFTY THOUSAND AND
NO/100 DOLLARS ($24,150,000.00) as the same may be adjusted as provided below. The Purchase Price
shall be payable as follows:

          (a) Balance of Purchase Price. The balance of the Purchase Price, plus or minus prorations
and other adjustments, if any, shall be due in cash at Closing, provided that the Earnest Money
(defined below) shall be applied to the cash balance. Purchaser shall pay such balance to Seller,
by wire transfer of immediately available funds to be received by Seller at or before 2:00 p.m.
Central Daylight Time on the Closing Date.

          (b) Initial Earnest Money Deposit. Within one (1) business day of the execution of this
Agreement by both Seller and Purchaser, Purchaser shall deposit the sum of TWO HUNDRED THOUSAND and
No/100 DOLLARS ($200,000.00) (the “Initial Earnest Money”) with the escrow department of First
American Title Insurance Company, 1900 Midwest Plaza West, 801 Nicollet Mall, Minneapolis, MN
55402-2504 (“Title Company”) pursuant to an escrow agreement in substantially the form of
Exhibit F attached hereto and made a part hereof (the “Escrow Agreement”).

          (c) Additional Earnest Money Deposit. If this Agreement has not been terminated as set forth
in Section 3 hereof on or before the Contingency Date, Purchaser shall deposit the
additional sum of THREE HUNDRED THOUSAND and NO/100 DOLLARS ($300,000.00) (the “Additional Earnest
Money”) with the escrow department of the Title Company within one (1) business after the
Contingency Date. Upon such deposit, the Title Company shall issue its written acknowledgment of
receipt as required under the Escrow Agreement. The Initial Earnest Money, Additional Earnest
Money and Extension Payment (as defined herein), if any, and all interest earnings thereon are
collectively referred to herein as the “Earnest Money.” The Title Company will immediately deposit
the Earnest Money in accordance with the Escrow Agreement. The Earnest Money shall be paid to
Seller at Closing as a credit against the Purchase Price.

     3. Conditions Precedent to Closing. Purchaser’s obligation to consummate the transaction
contemplated by this Agreement shall be subject to satisfaction or waiver of each of the following
conditions (“Conditions Precedent”) on or before 5:00 p.m. Central Daylight Time, on the date which
is thirty (30) days after the date of delivery of each of the items in Section 3(b) below
(“Contingency Date”):

          (a) Title/Survey. Within twenty (20) days of the date hereof, Seller will furnish to
Purchaser: (i) a current title commitment (“Commitment”) for the Real Property (with copies of all
underlying title documents listed in the Commitment other than any financing documents) for an ALTA

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form owner’s title policy (the “Title Insurance Policy”) in the amount of the Purchase Price
issued by the Title Company showing title in Seller and (ii) an updated ALTA as-built survey
(“Survey”) for the Real Property. If the Survey discloses survey defects or if the Commitment
shows exceptions unacceptable to Purchaser (collectively, the “Unpermitted Encumbrances”), then
Purchaser shall notify Seller, in writing, within five (5) days after receipt of the Commitment,
the underlying title documents and the Survey, specifying the Unpermitted Encumbrances, and, prior
to the Contingency Date, Purchaser shall have received assurances satisfactory to Purchaser, in its
reasonable discretion, that the Unpermitted Encumbrances will be removed or endorsed over on or
before Closing. Notwithstanding anything herein to the contrary, Seller shall have no obligation
to correct, cure or remove any Unpermitted Encumbrances.

          (b) Due Diligence Materials; Tests. Seller shall, within three (3) business days following
execution of this Agreement, deliver to Purchaser true and correct copies of all Lease, Permits,
Service Contracts, Warranties, Plans and without duplication of any of the previous items and to
the extent they are in possession of the Seller or the manager of the Subject Property, the items
listed on the attached Exhibit M (collectively, the “Property Information”).

          (c) If Purchaser is not satisfied, in its sole and absolute discretion, with the condition of
the Subject Property or if Purchaser deems, in Purchaser’s sole and absolute discretion, the
Subject Property unsuitable for Purchaser’s purposes or for any other reason whatsoever Purchaser
elects not to proceed with the transaction contemplated by this Agreement, then Purchaser may
terminate this Contract by giving written notice to Seller on or before the Contingency Date, in
which case the Earnest Money will be returned to Purchaser and the parties will have no further
obligations under this Agreement (except for the return of the Earnest Money and any obligations
that specifically survive termination of this Agreement). If Purchaser fails to give any notice on
or prior to the Contingency Date, then the Earnest Money shall become nonrefundable as of the
Contingency Date and the Closing shall occur on a date in the period beginning on August 15, 2005
and ending on September 1, 2005, provided that Seller shall be required to give Purchaser at least
five (5) business days notice prior to such date (the “Closing Date”). If Purchaser gives notice
as provided above, then this Agreement shall terminate, provided if Seller so requests, Purchaser
shall execute any document reasonably required by Seller to evidence such termination including,
without limitation, a quit claim deed. Upon such termination, neither party will have any further
rights or obligations (other than the obligations of Purchaser set forth in Section 3(b)
and the indemnity and other obligations of Seller set forth in Section 1(f), 3(b),
13 and 31 which obligations shall survive any termination; such indemnity
obligations shall be referred to herein as the “Surviving Indemnity Obligations”) regarding this
Agreement or the Subject Property.

     4. Covenants by Seller. Seller covenants and agrees with Purchaser that from the date hereof
until the Closing Date (as herein defined), Seller shall conduct its business involving the Subject
Property as follows, and during such period will (except as specifically provided to the contrary
herein):

          (a) Refrain from creating on the Subject Property any easements, encumbrances or liens
affecting the Subject Property other than as may be required by any applicable governmental or
quasi-governmental authority or by a provider of utility services, and refrain from removing any
Personal Property, fixture or equipment; provided, however, nothing herein shall preclude Seller or
the Property Manager from replacing any such items in the ordinary course of operating the Subject
Property. Seller shall, upon Seller’s receipt, deliver to Purchaser a copy of any easement so
required by any governmental or quasi-governmental authority or provider of utility services
affecting the Subject Property which does not require the consent of Purchaser, and any such
easement shall constitute a Permitted Encumbrance.

          (b) Refrain from entering into or amending the Service Contracts, Warranties or Permits (other
than Lease which is governed by 4(d) below) regarding the Subject Property (other than contracts in
the ordinary course of business which are cancelable by the owner of the Subject Property

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without penalty within thirty (30) days after giving notice thereof) without the prior written
consent of Purchaser, which consent shall not be unreasonably withheld, delayed or conditioned, and
which shall be deemed given if Purchaser does not object to Seller’s request for approval within
five (5) business days.

          (c) Operate, maintain, repair and insure the Subject Property in a commercially reasonable
manner consistent with the existing operation, maintenance, repair and insurance of the Subject
Property and deliver the Subject Property as of the Closing substantially in the condition it is in
of the date hereof, ordinary wear and tear, and damage by fire or other casualty excepted.

          (d) Except as expressly provided herein, from and after the date hereof (provided that this
Agreement has not been terminated), Seller shall refrain from amending the existing Lease without
Purchaser’s written approval, as provided below, provided that Purchaser shall have no ability to
interfere with the administration by Seller of the existing Lease as required by the terms of such
Lease. Purchaser shall have three (3) business days from receipt of such amendment to approve or
disapprove the same, which approval shall not be unreasonably withheld, conditioned or delayed. In
the event that Purchaser does not approve any such amendment, Purchaser shall notify Seller, in
writing, of such disapproval prior to expiration of the aforesaid three (3)-business day period,
stating in such written notification under what conditions, if any, Purchaser’s approval would be
forthcoming and Purchaser’s agreement to approve such amendment if such conditions are satisfied.

          (e) Promptly provide Purchaser with copies of all written notices delivered or received under
the Lease.

          (f) Promptly provide Purchaser a copy of any notice of litigation received by Seller that may
materially and adversely affect the ownership or operation of the Subject Property.

          5. Representations by Seller. As used in this Agreement, the phrase “to Seller’s knowledge”
or words of similar import shall mean the actual knowledge of Andrew C. Deckas, Wade Lau, and Peg
Bowden, without independent investigation or inquiry. Subject to the foregoing, Seller represents
to Purchaser as follows:

          (a) Authority. Seller is a limited liability company duly organized and validly existing and
in good standing under the laws of the State of Delaware; Seller has the requisite power and
authority to enter into and perform this Agreement, the Closing Documents (as herein defined) to
which it is a party; such documents have been duly authorized by all necessary action on the part
of Seller and have been or will be duly executed and delivered; such execution, delivery and
performance by Seller of such documents will not conflict with or result in a violation of Seller’s
organizational documents, or any judgment, order, or decree of any court or arbiter to which Seller
is a party; and such documents are valid and binding obligations of Seller, and are enforceable
against Seller in accordance with their terms, subject to applicable bankruptcy, insolvency,
reorganization, moratorium, creditor’s rights and other similar laws. Each individual executing
this Agreement on behalf of Seller is duly authorized to do so.

          (b) FIRPTA. Seller is not a “foreign person,” “foreign partnership,” “foreign trust” or
“foreign estate” as those terms are defined in Section 1445 of the Internal Revenue Code.

          (c) Proceedings. To the knowledge of Seller, there is no action, litigation, investigation,
condemnation or proceeding of any kind pending or, to the knowledge of Seller, threatened against
Seller which would have a material and adverse affect on the ability of Seller to perform its
obligations under this Agreement, or related to the Subject Property or the Lease other than as
disclosed to Purchaser in writing.

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          (d) Lease.

	 	(i)	 	Exhibit B is a true and complete list
of the Lease and all other occupancy agreements relating to the Subject
Property. Except as set forth in the Lease, there are no rights of
first refusal, options to terminate without cause of Seller, options to
renew, options to purchase, or any rent abatements given to tenant
under the Lease (the “Tenant”) after the Tenant is in occupancy and
paying rent.
	 
	 	(ii)	 	To the Seller’s knowledge, the Lease is in full
force and effect according to the terms set forth therein, and has not
been modified, amended, or altered, in writing or otherwise, except as
set forth in Exhibit B.
	 
	 	(iii)	 	To Seller’s knowledge there are not, and
Seller has not received written notice from Tenant of any unperformed
obligation of the landlord under the Lease, including, without
limitation, failure of the landlord to construct any required tenant
improvements. To Seller’s knowledge there are not, and Seller has not
been advised in writing of any claims or disputes giving rise to any
setoff by Tenant. To Seller’s knowledge, with respect to the Lease all
tenant improvement allowances have been paid and all tenant
improvements have been completed.
	 
	 	(iv)	 	To Seller’s knowledge, neither Seller nor
Tenant is in default under the Lease (beyond any applicable grace or
cure period), and there are no rent delinquencies of more than thirty
(30) days.
	 
	 	(v)	 	There are no brokers’ commissions, finders’
fees, or other charges payable or to become payable to any third party
on behalf of Seller as a result of or in connection with the Lease,
including, without limitation, any unexecuted options to expand or
renew, except as set forth on Exhibit B-1 attached hereto and
made a part hereof.

          (e) Blocked Persons. Seller has not received written notice that Seller is:

	 	(i)	 	listed on the Specially Designated Nationals
and Blocked Persons List maintained by the Office of Foreign Assets
Control, Department of the Treasury (“OFAC”) pursuant to Executive
Order No. 13224, 66 Fed. Reg. 49079 Sept. 25, 2001 (the “ Order”)
and/or on any other list of terrorists or terrorist organizations
maintained pursuant to any of the rules and regulations of OFAC or
pursuant to any other applicable Orders (such lists are collectively
referred to as the “Lists”);
	 
	 	(ii)	 	a person who has been determined by competent
authority to be subject to the prohibitions contained in the Order;
	 
	 	(iii)	 	owned or controlled by, and does not act for
or on behalf of, any person or entity on the Lists or any other person
or entity who has been determined by competent authority to be subject
to the prohibitions contained in the Order.

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          (f) Bankruptcy. Seller is not the subject of, and has not received any written notice of or
threat that the Seller has or will become the subject of, any reorganization, liquidation,
dissolution, receivership or other action or proceeding under the United States Bankruptcy Code, 11
U.S.C. §§ 101, et seq., or any other federal, state or local laws affecting the rights of debtors
and/or creditors generally, whether voluntary or involuntary and including, without limitation,
proceedings to set aside or avoid any transfer of any interest in property or obligations, whether
denominated as a fraudulent conveyance, preferential transfer or otherwise, or to recover the value
thereof or to charge, encumber of impose a lien thereon.

          (g) Service Contracts. Exhibit D attached hereto is a complete list of all current
Service Contracts which list includes the names of the contracting parties, the dates of the
Service Contracts and a listing of all amendments to such Service Contracts.

          (h) Condemnation. Seller has no knowledge of nor has it received any written notice of any
pending or contemplated condemnation proceedings affecting all or any part of the Subject Property.

          (i) Accuracy of Documents. All documents and records to be delivered comprising the Property
Information are true, correct and complete copies of the documents and records purported to be
delivered thereunder.

     6. Representations by Purchaser and Other Matters.

          (a) Representations by Purchaser. Purchaser represents to Seller as follows:

     (i) that Purchaser is a corporation duly organized and validly existing and in
good standing under the laws of the District of Columbia, that Purchaser has the
requisite power and authority to enter into this Agreement, and the Closing
Documents (as herein defined) that it is party to; such documents have been duly
authorized by all necessary action on the part of Purchaser and have been or will be
duly executed and delivered; that the execution, delivery and performance by
Purchaser of such documents will not conflict with or result in violation of
Purchaser’s organizational documents or any judgment, order or decree of any court
or arbiter to which Purchaser is a party; such documents are valid and binding
obligations of Purchaser, and are enforceable against Purchaser in accordance with
their terms, subject to applicable bankruptcy, insolvency, reorganization,
moratorium, creditor’s rights and other similar laws.

     (ii) Purchaser has not received written notice that Purchaser is:

	 	(A)	 	listed on the Specially Designated Nationals
and Blocked Persons List maintained by the Office of Foreign Assets
Control, Department of the Treasury (“OFAC”) pursuant to Executive
Order No. 13224, 66 Fed. Reg. 49079 Sept. 25, 2001 (the “ Order”)
and/or on any other list of terrorists or terrorist organizations
maintained pursuant to any of the rules and regulations of OFAC or
pursuant to any other applicable Orders (such lists are collectively
referred to as the “Lists”);
	 
	 	(B)	 	a person who has been determined by competent
authority to be subject to the prohibitions contained in the Order;

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	 	(C)	 	owned or controlled by, and does not act for or
on behalf of, any person or entity on the Lists or any other person or
entity who has been determined by competent authority to be subject to
the prohibitions contained in the Order.

     (iii) Purchaser shall not transfer or permit the transfer of any interest in
Purchaser to any person or entity who is listed on the Lists.

          (b) Other Matters. The representations of Seller and Purchaser contained in this Agreement
shall survive Closing; provided, however, (i) any cause of action of Purchaser against Seller by
reason of a breach or default of any of the representations in Section 5 set forth herein
or in any certificates executed by Seller pursuant to Section 8(a) below or in any Closing
Documents or Purchaser’s and Seller’s Closing Documents that Seller is a party to shall
automatically expire as of the date which is twelve (12) months after the Closing (the “Warranty
Expiration Date”), except that the same shall not expire as to any such breach or default as to
which Purchaser has given written notice to Seller of a claim for any such breach or default prior
to the Warranty Expiration Date, (ii) Seller’s total liability for any breach or breaches of its
representations in Section 5 set forth herein shall in no event exceed $750,000.00 in the
aggregate, which liability limit shall survive Closing, and (iii) Seller shall not have any
liability whatsoever to Purchaser with respect to any breach or breaches by Seller of its
respective representations in Section 5 set forth herein, if, prior to Closing, Purchaser
obtains knowledge by virtue of a written document or report received on or prior to the Closing
Date of a fact or circumstance, the existence of which would constitute a breach of Seller’s
representations in Section 5 set forth herein. Among other things, for purposes hereof,
Purchaser shall be deemed to have knowledge of any fact or circumstance set forth in any
environmental assessments, engineering reports, estoppel certificate (as defined in Section
7(b)(v) hereof) or other written materials reviewed or received by Purchaser on or prior to the
Closing Date. Seller’s representations in Section 5 set forth herein shall be deemed
automatically modified to the extent that any information contained in any environmental
assessments or engineering reports or other written materials reviewed or received by Purchaser
prior to the Closing Date is inconsistent with the matters which are the subject of such
representations in Section 5. Notwithstanding the foregoing, Seller shall not have any
liability with respect to any breach to the extent the loss sustained by Purchaser as a result
thereof does not exceed $25,000.00 in the aggregate, provided, further if any such loss exceeds
$25,000.00, Seller shall be liable for the total amount of such loss subject to the maximum
liability provisions herein contained.

     7. Closing.

          (a) Closing Date. The closing of the purchase and sale contemplated by this Agreement (the
“Closing”) shall occur on or prior to the Closing Date, subject to delays occasioned by operation
of Section 8(b), at the office of the Title Company or at such other time and place as the
parties may mutually agree.

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          (b) Purchaser’s Closing Conditions Precedent. Purchaser’s obligation to consummate the
transaction contemplated by this Agreement shall be subject to satisfaction or waiver of each of
the following conditions (“Purchaser’s Closing Conditions Precedent”); provided, however that
Purchaser shall have the unilateral right to waive any Purchaser’s Closing Conditions Precedent, in
whole or in part, by written notice to Seller:

	 	(i)	 	The representations in Section 5 of
Seller hereof shall be, in all material respects, true and complete as
of the Closing.
	 
	 	(ii)	 	Seller shall have performed all of the
obligations required to be performed by Seller under this Agreement, as
and when required by this Agreement, in all material respects.
	 
	 	(iii)	 	There shall not have been instituted and be
pending any action or proceeding before any court, governmental agency
or other regulatory or administrative agency or commission challenging
the purchase and sale of the Subject Property or the transactions
related thereto that seeks to restrain, prevent or change the
transactions contemplated hereby or questions the validity of such
transactions.
	 
	 	(iv)	 	Neither the Purchaser nor the Seller shall have
terminated this Agreement as provided herein.
	 
	 	(v)	 	Purchaser shall have received from Tenant an
estoppel certificate at least five (5) days prior to the Closing Date,
substantially in the form of Exhibit H attached hereto.

          (c) Seller’s Conditions Precedent. Seller’s obligation to consummate the transaction
contemplated by this Agreement shall be subject to satisfaction or waiver of each of the following
conditions (“Seller’s Closing Conditions Precedent”), but Seller shall have the unilateral right to
waive, in whole or in part, any Seller’s Closing Conditions Precedent by written notice to
Purchaser:

	 	(i)	 	The representations in Section 6 of
Purchaser hereof shall be, in all material respects, true and complete.
	 
	 	(ii)	 	Purchaser shall have performed all of the
obligations required to be performed by Purchaser under this Agreement,
as and when required by this Agreement, in all material respects.

In the event Purchaser’s Closing Conditions Precedent or Seller’s Closing Conditions Precedent, as
the case may be, have not been satisfied or waived as of the scheduled Closing Date as the same may
be extended as permitted above, and provided the failure to satisfy or waive any such condition is
not attributable to a breach or default of this Agreement by Seller or Purchaser, as the case may
be (in which event the provisions of Section 10 shall apply), this Agreement shall
terminate (other than the Surviving Indemnity Obligations, which obligations shall survive any such
termination) and the Earnest Money shall promptly be returned to Purchaser; provided, however, upon
such termination Purchaser shall, at the request of Seller, execute any document reasonably
requested by Seller to evidence such termination, including, without limitation, a quit claim deed.
Upon such termination, neither party will have any further rights or obligations (other than the
Surviving Indemnity Obligations which shall survive any such termination) regarding this Agreement
or the Subject Property.

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     8. Closing Deliveries.

          (a) Seller’s Closing Documents. On the Closing Date Seller shall execute and/or deliver to
Purchaser or cause to be executed and/or delivered the following (collectively, “Seller’s Closing
Documents”):

	 	(i)	 	Deed. A Special Warranty Deed (“Deed”)
conveying the Real Property to Purchaser in the form attached as
Exhibit I hereto.
	 
	 	(ii)	 	Bill of Sale. A Bill of Sale transferring the
Personal Property for the Subject Property, if any.
	 
	 	(iii)	 	Termination of Management Agreement. Evidence
that any management agreement for the Subject Property has been
terminated.
	 
	 	(iv)	 	Certificate Regarding Representations in
Section 5. A certificate stating that the representations in
Section 5 made by Seller under this Agreement are true and
complete in all material respects as of the Closing Date, or indicating
any material and adverse change in any such representations.
	 
	 	(v)	 	FIRPTA Affidavit. A non-foreign affidavit
properly containing such information as is required by Section
1445(b)(2) of the Internal Revenue Code and its regulations promulgated
thereunder.
	 
	 	(vi)	 	Title Documents. Such affidavits of Seller,
transfer tax declarations or other documents as may be reasonably
required by Title Company in order to record the Deed and issue the
Title Insurance Policy.
	 
	 	(vii)	 	Miscellaneous. Other documents reasonably
required to consummate the transaction this Agreement contemplates.

          (b) Title Insurance Policy. At Closing, Seller shall cause the Title Company, to deliver to
Purchaser the Title Insurance Policy, marked-up title commitments or proforma owner’s policies in
accordance with the Commitment. If the Title Insurance Policy which the Title Company is prepared
to issue shows any Unpermitted Encumbrances, Seller covenants and agrees, within thirty (30) days
after the scheduled Closing Date (such 30-day period being sometimes hereinafter referred to as the
“Cure Period”), to use reasonable efforts to remove such Unpermitted Encumbrances or to cause the
Title Company to issue its endorsement over any such Unpermitted Encumbrances, which endorsement
shall be in form and substance acceptable to Purchaser in its sole discretion and the Closing shall
be delayed in accordance with this Section 8(b) while Seller undertakes such efforts. If,
after using reasonable efforts, as aforesaid, Seller cannot cause such Unpermitted Encumbrances to
be removed or if Seller cannot cause the Title Company to issue its endorsement over any such
Unpermitted Encumbrances on or before the expiration of the Cure Period, Purchaser shall, within
five (5) business days following expiration of the Cure Period, elect to either (i) terminate this
Agreement (other than Surviving Indemnity Obligations, which obligations shall survive any such
termination) and the Earnest Money shall be returned to Purchaser, provided if Seller so requests,
Purchaser shall execute any document reasonably requested by Seller to evidence such termination
including, without limitation, a quit claim deed, and neither party will have any further
obligations (other than the Surviving Indemnity Obligations, which obligations shall survive any
such termination) or (ii) take title to the Real Property subject to the Unpermitted Encumbrances
as it then is (without any reduction in the Purchase Price), provided that Seller shall remove any
mortgage or similar financing lien against Seller. Failure of Purchaser to notify Seller within
the time limits prescribed herein shall constitute an election under clause (ii) above.

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          (c) Purchaser’s Closing Documents. On the Closing Date, Purchaser will execute and/or deliver
or cause to be executed and/or delivered to Seller the following (collectively, “Purchaser’s
Closing Documents”):

	 	(i)	 	Purchase Price. The Purchase Price, plus or
minus prorations or other adjustments, if any, by wire transfer of
immediately available funds, to
be received in Title Company’s trust account on or before 12:00 p.m.
central standard time on the Closing Date.
	 
	 	(ii)	 	Title Documents. Such affidavits of Purchaser,
transfer tax declarations or other documents as may be reasonably
required by Title Company in order to record the Deed and issue the
Title Insurance Policy.
	 
	 	(iii)	 	Certificate Regarding Representations in
Section 6. A certificate executed by Purchaser certifying that
representations in Section 6 made by Purchaser under this
Agreement are true and complete in all material respects as of the
Closing Date.
	 
	 	(iv)	 	Miscellaneous. Other documents reasonably
required to consummate the transaction this Agreement contemplates.

          (d) Purchaser’s and Seller’s Closing Documents. On the Closing Date, Seller and Purchaser
shall jointly execute and deliver or cause to be executed and delivered the following (together
with the Purchaser’s Closing Documents and the Seller’s Closing Documents, the “Closing Documents”:

	 	(i)	 	Closing Statement. A Closing Statement in form
and substance reasonably acceptable to both Seller and Purchaser and
consistent with the terms of this Agreement, showing the Purchase Price
and all prorations, adjustments, credits and debits this Agreement
describes.
	 
	 	(ii)	 	Assignment and Assumption of Lease. An
Assignment and Assumption of Lease in the form of Exhibit J
attached hereto (the “Assignment and Assumption of Lease”).
	 
	 	(iii)	 	Assignment and Assumption of Contracts and
Project Documents. An Assignment and Assumption of Contracts and
Project Documents in the form of Exhibit K attached hereto (the
“Assignment and Assumption of Contracts and Project Documents”).
	 
	 	(iv)	 	Notices to Tenants. Written notices to the
Tenants advising them of the sale of the Subject Property and directing
them to make future lease payments and to send all notices or other
communications to Purchaser at the place designated by Purchaser in the
form of Exhibit N attached hereto.
	 
	 	(v)	 	Designation Agreement. A Designation Agreement
executed by Seller, Purchaser and Title Company designating the
“reporting person” for purposes of completing the Internal Revenue
Service Form 1099 and, if applicable, Internal Revenue Form 8594 (the
“Designation Agreement”).
	 
	 	(vi)	 	Miscellaneous. Such other documents,
instruments and affidavits as shall be reasonably necessary to
consummate the transaction contemplated hereby.
	 
	 	(vii)	 	Tax Declarations and Affidavits. Transfer tax
declarations or affidavits to the extent required by law with respect
to the Subject Property.

10

 

          (e) Post-Closing Deliveries. Within a reasonable time following the Closing, Seller shall
deliver, or cause to be delivered, the following items to Purchaser:

	 	(i)	 	Original Documents. Original copies of the
Lease, the Permits, the Warranties, the Service Contracts to the extent
not previously delivered to Purchaser, (to the extent assumed by
Purchaser) and the Plans to the extent in Seller’s possession.
	 
	 	(ii)	 	Keys and Manuals. Seller shall deliver to
Purchaser all of the keys in Seller’s possession to any door or lock at
the Subject Property, in the possession or control of the Seller.
	 
	 	(iii)	 	Tenant Files. The current tenant files,
including notices, financial information, and other information to the
extent such items are in the possession of Seller and subject to any
confidentiality restrictions imposed upon Seller by the applicable
tenant.

     9. Adjustment and Prorations. For purposes of calculating prorations, Purchaser shall be
deemed to be in title to the Subject Property, and therefore entitled to the income therefrom and
responsible for the expenses thereof, for the entire day upon which the Closing occurs. All such
prorations shall be made on the basis of the actual number of days of the year and month that shall
have elapsed as of the Closing Date. The amount of such prorations shall be adjusted in cash after
Closing, as and when complete and accurate information becomes available. Seller and Purchaser
agree to cooperate and use their good faith and diligent efforts to make such adjustments within a
reasonable time after the calendar year end following Closing. Except as specifically provided
otherwise herein, items of income and expense for the period prior to the Closing Date will be for
the account of Seller and items of income and expense for the period on and after the Closing Date
will be for the account of Purchaser, all as determined by the accrual method of accounting. Bills
received after Closing that relate to expenses incurred, services performed or other amounts
allocable to the period prior to the Closing Date shall be paid by Purchaser if such bills are for
Operating Expense Pass-Throughs (as hereinafter defined). The obligations of the parties pursuant
to this Section 9 shall survive the Closing and shall not merge into any documents of
conveyance delivered at Closing.

          (a) Real Estate Taxes and Special Assessments. Real estate taxes and assessments imposed by
governmental authority (and any assessments imposed by private covenant) due and payable in the
year of Closing shall be prorated as of the Closing Date based upon the most recent tax bills or
assessment. Seller shall receive a credit for any taxes and assessments paid by Seller and
applicable to any period after the Closing. Special assessments shall be prorated according to the
due dates of installments, with Seller being responsible for installments that become due and
payable before the Closing Date, and Purchaser being responsible for installments that become due
and payable on or after the Closing Date. If, for the fiscal tax year in which the Closing is
held, or any prior year, there are any tax protests filed, or abatement application proceedings
pending at any time prior to the Closing with reference to the Property, Seller shall have the
right to settle such protests or proceedings as long as such settlement does not include any
agreement as to the valuation of the Property for real estate tax purposes for the period after the
Closing. Otherwise, Seller shall not settle the same without Purchaser’s prior written consent.
All amounts recovered as a result thereof, whether by settlement or otherwise, shall, net of
attorneys’ fees and other expenses, be apportioned as of the Closing for the fiscal tax year in
which the Closing is held, and paid, when received, to the parties entitled thereto; provided,
however, that to the extent any such amounts are payable to Tenant pursuant to the terms of the
Lease, such amounts shall be promptly paid over to such Tenant. The parties agree to execute any
papers or take such steps, either before or after any Closing, as may be necessary to carry out the
intention of the foregoing.

11

 

          (b) Title Insurance. Purchaser shall pay all title examination fees of Title Company, the
premium for the cost of the Title Insurance Policy with endorsements and all costs of any lender’s
title insurance policy, if applicable.

          (c) Survey Costs. Purchaser shall pay all costs of the Survey.

          (d) Closing Fee. Seller and Purchaser will each pay one-half of any reasonable and customary
closing fee charged by the Title Company.

          (e) Transfer Tax. The Virginia Grantor Tax applicable to the sale, and any additional
transfer taxes including, without limitation, state and county transfer or recordation taxes,
regarding the Deed to be delivered by Seller under this Agreement shall be split equally between
Seller and Purchaser. Purchaser shall pay for any mortgage registration or recording taxes in
connection with any loan documentation or mortgages recorded by Purchaser and/or Purchaser’s
lender, if any.

          (f) Collected Rents. All collected net rent (excluding Operating Expense Pass-Throughs) and
other collected income under the Lease shall be prorated as of the Closing. Seller shall be
charged with any rent and other income collected by Seller before Closing but applicable to any
period of time after Closing. Uncollected rent and other income shall not be prorated. Purchaser
shall apply rent and other income from Tenant that are collected by Purchaser after the Closing
unless the Tenant properly identifies the payment as being for a specific item, in the following
order: (i) first, to Purchaser’s reasonable costs of collection incurred with respect to such
Tenant, (ii) second, to Purchaser in payment of the current rent due under such Lease, (iii) third,
to Purchaser in payment of delinquent rent due under such Lease for the period from and after the
Closing, and (iv) fourth, to Seller in payment of rent coming due and payable prior to the Closing.
Any prepaid rents for the period on or following the Closing Date shall be paid over by Seller to
Purchaser. Purchaser will make commercially reasonable efforts, without suit, to collect any rents
relating to the period before Closing. Seller shall have the right to sue delinquent Tenants for
delinquent rent so long as Seller does not cause a termination of any Lease.

          (g) Operating Expense Pass-Throughs. Seller, as landlord under the Lease, is currently
collecting from Tenant under the Lease additional rent and an expense stop to cover taxes,
insurance, utilities, common area maintenance and other operating costs and expenses (collectively,
“Operating Expense Pass-Throughs”) in connection with the ownership, operation, maintenance and
management of the Subject Property. Seller and Purchaser shall each receive a debit or credit, as
the case may be, for the difference between the Tenant’s collected account balance for Operating
Expense Pass-Throughs and the amount of Operating Expense Pass-Throughs due to or from Tenant as of
the Closing Date. Operating Expense Pass-Throughs for Seller’s period of ownership shall be
reasonably estimated by the parties if final bills are not available. If Seller was overpaid by
any Tenant for the period with respect to any such charges prior to Closing, Seller shall remit to
Purchaser such estimated overpayment at Closing. If Seller was underpaid by any Tenant for the
period with respect to any such charges prior to Closing, Seller shall receive a credit at Closing
for the amount of such estimated underpayment. Any item in this Section 9(g) that is paid
directly by any Tenant pursuant to its Lease shall not be prorated between the parties, and
Purchaser shall look to the Tenant to pay such items. Seller and Purchaser agree to cooperate and
use their good faith and diligent efforts to do a true-up and make any necessary adjustments to the
proration of the Operating Expense Pass-Throughs within ninety (90) days after the calendar year
end following Closing.

          (h) Security Deposits. Purchaser shall receive a credit against the Purchase Price in an
amount equal to the sum of all unapplied cash security deposits in Seller’s possession plus, if
accrued interest on such security deposits must be reimbursed to any Tenant that paid a security
deposit, all interest accrued on such security deposits.

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          (i) Recording Costs. Seller and Purchaser shall each pay one-half of the cost of recording
the Deed and all other recording costs, except Purchaser shall pay any and all recording costs in
connection with any loan documentation or mortgages recorded by Purchaser and/or Purchaser’s
lender, if any.

          (j) Leasing Commissions for Renewals, Expansions and Options. Purchaser shall be responsible
to pay any leasing commissions due with respect to the renewal, expansion or exercise of options on
any Lease, as set forth on Exhibit B-1.

          (k) Other Costs. All other costs shall be allocated in accordance with the customs prevailing
in similar transactions in the respective metropolitan areas where the Subject Property is located.

Except as otherwise expressly provided in this Agreement, all prorations provided for herein shall
be final.

     10. Default/Remedies. IN THE EVENT OF A BREACH OR DEFAULT BY SELLER IN CLOSING THE
TRANSACTION CONTEMPLATED BY THIS AGREEMENT, PURCHASER, AS ITS SOLE AND EXCLUSIVE REMEDY, SHALL HAVE
THE RIGHT EITHER (I) TO TERMINATE THIS AGREEMENT AND RECEIVE A RETURN OF THE EARNEST MONEY AND
SELLER SHALL REIMBURSE PURCHASER FOR ITS REASONABLE OUT OF POCKET COSTS UP TO A MAXIMUM AMOUNT OF
$37,500.00 ASSOCIATED WITH THE NEGOTIATION AND PREPARATION OF THIS AGREEMENT AND ITS EXAMINATION OF
THE PROPERTY, INCLUDING WITHOUT LIMITATION, THE FEES AND DISBURSEMENTS OF ITS COUNSEL, ADVISERS,
AND AGENTS, OR (II) TO ENFORCE SPECIFIC PERFORMANCE OF THIS AGREEMENT, PROVIDED THAT ANY ACTION FOR
SPECIFIC PERFORMANCE BE COMMENCED WITHIN NINETY (90) DAYS OF THE SCHEDULED CLOSING DATE (OR SUCH
LONGER PERIOD AS MAY BE REQUIRED BY LAW), AS THE SAME MAY HAVE BEEN EXTENDED PURSUANT TO THE
PROVISIONS HEREOF. EXCEPT FOR THE SURVIVING INDEMNITY OBLIGATIONS, WHICH SHALL SURVIVE TERMINATION
OF THE AGREEMENT, IN THE EVENT OF A BREACH OR DEFAULT BY PURCHASER IN CLOSING THE TRANSACTION
CONTEMPLATED BY THIS AGREEMENT, SELLER, AS ITS SOLE AND EXCLUSIVE REMEDY, SHALL HAVE THE RIGHT TO
TERMINATE THIS AGREEMENT AND RECEIVE THE EARNEST MONEY AS LIQUIDATED DAMAGES, IT BEING AGREED BY
SELLER AND PURCHASER THAT THE DAMAGES TO SELLER IN CASE OF DEFAULT BY PURCHASER MAY BE IMPOSSIBLE
TO ASCERTAIN AND THAT THE EARNEST MONEY CONSTITUTES A FAIR AND REASONABLE AMOUNT OF DAMAGES IN THE
CIRCUMSTANCES AND IS NOT A PENALTY. NOTHING HEREIN CONTAINED SHALL LIMIT THE RIGHTS OR OBLIGATIONS
OF THE PARTIES WITH RESPECT TO A DEFAULT UNDER THIS AGREEMENT OCCURRING AFTER THE CLOSING DATE, AND
IN SUCH CASE THE PARTIES SHALL HAVE ALL RIGHTS AND REMEDIES AVAILABLE AT LAW, IN EQUITY OR
OTHERWISE INCLUDING, WITHOUT LIMITATION, THE RIGHT TO SPECIFIC PERFORMANCE, SUBJECT TO THE
CONDITIONS AND LIMITATIONS HEREIN SET FORTH, INCLUDING, WITHOUT LIMITATION, THE PROVISIONS OF
SECTION 6(b) HEREOF. NOTWITHSTANDING ANYTHING HEREIN TO THE CONTRARY, NEITHER PARTY SHALL
BE ENTITLED TO RECEIVE SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES UNDER THIS AGREEMENT
OR OTHER DOCUMENTS DELIVERED IN CONNECTION HEREWITH.

     11. Damage. If, prior to the Closing Date, all or any part of the Improvements are
substantially damaged by fire or other casualty, Seller shall promptly give notice to Purchaser of
such

13

 

fact. Thereafter, at Purchaser’s option (to be exercised by Purchaser’s written notice to
Seller given within thirty (30) days after Seller’s initial notice to Purchaser), this Agreement
shall terminate with respect to the Subject Property. In the event of any such termination of this
Agreement, the Earnest Money shall be returned to Purchaser and thereafter neither party will have
any further obligations under this Agreement (other than the Surviving Indemnity Obligations, which
obligations shall survive any such termination), that Purchaser shall, at the request of Seller,
execute any document reasonably requested by Seller to evidence such termination including, without
limitation, a quit claim deed. If Purchaser fails to elect to terminate this Agreement (in the
manner provided in this Section 11) despite such damage, or if the Improvements are damaged
but not substantially, Seller shall promptly commence to repair such damage or destruction and to
return the damaged Improvements to substantially their condition prior to such damage. If such
damage shall be completely repaired prior to the Closing Date, then there shall be no reduction in
the Purchase Price, and Seller shall retain the proceeds of all insurance related to such damage.
If such damage shall not be completely repaired prior to the Closing Date, but Seller is diligently
proceeding to repair, then Seller shall complete the repair after the Closing Date and shall be
entitled to receive the proceeds of all insurance related to such damage; provided, however, that
Purchaser shall have the right to delay the Closing Date until repair is completed. For purposes
of this Section 11, the phrase “substantially damaged” means damage that gives rise to the
ability of the Tenant(s) leasing at least fifty percent (50%) of the rentable square feet in the
Subject Property (in the aggregate) to terminate such Tenants’ Lease(s) pursuant to the terms and
conditions of such Lease(s) and such Tenant(s) actually terminate such Lease(s).

     12. Condemnation. If, prior to the Closing Date, eminent domain proceedings are commenced
against all or any substantial part of the Subject Property, Seller shall immediately give notice
to Purchaser of such fact and, at Purchaser’s option (to be exercised within fifteen (15) days
after Seller’s notice), this Agreement shall terminate with respect to the Subject Property. In
the event of any such termination, the Earnest Money shall be returned to Purchaser and thereafter
neither party will have further obligations under this Agreement (other than the Surviving
Indemnity Obligations, which obligations shall survive any such termination), except that Purchaser
shall, at the request of Seller, execute any document reasonably requested by Seller to evidence
such termination including, without limitation, a quit claim deed. If Purchaser fails to elect to
terminate this Agreement in the manner provided in this Section 12, then there shall be no
reduction in the Purchase Price, and Seller shall assign to Purchaser at the Closing Date all of
Seller’s right, title and interest in and to any award made or to be made in the condemnation
proceedings. Prior to the Closing Date, Seller shall not designate counsel, appear in, or
otherwise act with respect to the condemnation proceedings without Purchaser’s prior written
consent, which consent shall not be unreasonably withheld or delayed; provided, however, that if
any action is necessary with respect to such proceeding to avoid any forfeiture or material
prejudice, Seller shall be entitled to take such action as and to the extent necessary without
obtaining Purchaser’s prior written consent. For purposes of this Section, the words “substantial
part” means that the portion of the Subject Property to be so taken gives rise to the ability of
the Tenant(s) leasing at least fifty percent (50%) of the rentable square feet in the Subject
Property (in the aggregate) to terminate such Tenants’ Lease(s) pursuant to the terms and
conditions of such Lease(s) and such Tenant(s) actually terminate such Lease(s).

     13. Broker’s Commissions. Seller represents to Purchaser that insofar as Seller knows, no
third party broker or finder has been engaged or consulted by Seller or is entitled to compensation
or commission in connection herewith, other than Secured Capital Corporation (“Seller’s Broker”).
Seller shall be responsible to pay commissions due to Seller’s Broker in connection with the sale
contemplated by this Agreement. Seller shall defend, indemnify and hold harmless Purchaser from
and against any and all claims of brokers, finders of any like third party claiming any right to
commission or compensation by or through acts of Seller in connection herewith. Purchaser
represents and warrants to Seller that insofar as Purchaser knows, no third party broker or finder
has been engaged or consulted by Purchaser or is
entitled to compensation or commission in connection herewith, other than Grubb and Ellis.

14

 

Purchaser shall defend, indemnify and hold harmless Seller from and against any and all claims of
brokers, finders or any like party claiming any right to commission or compensation by or through
acts of Purchaser in connection herewith. The indemnity obligations hereunder shall include all
damages, losses, risks, liabilities, and expenses (including reasonable attorneys’ fees and costs)
arising from and related to matters being indemnified hereunder, and shall survive Closing and
execution and delivery of the Deed; provided, however, the total liability of Seller with respect
to the foregoing indemnity obligation shall be subject to the conditions and limitations set forth
in Section 6(d) hereof.
 

     14. Environmental Disclosure. Certain federal laws and state laws, including without
limitation the Comprehensive Environmental Response Compensation & Liability Act of 1980 (CERCLA),
42 U.S.C. Section 9601 et seq., require sellers of certain real estate to disclose the existence of
hazardous substances located on or beneath the property being transferred. To satisfy such
obligations under any and all applicable laws, ordinance, rules and regulations, Seller hereby
discloses that the Real Property contains or contained such hazardous materials (if any) as
described in the environmental reports listed on Exhibit L attached hereto and made a part
hereof (the “Reports”). Seller shall deliver the Reports to Purchaser within three (3) business
days following the execution of this Agreement, and Purchaser shall acknowledge receipt of the
Reports. Purchaser acknowledges and agrees that the Reports are provided by Seller for
informational purposes only and that Seller makes no representations or warranties as to the
accuracy or completeness of the Reports. Purchaser will conduct its own investigations and studies
of the Subject Property as it deems necessary or appropriate in order to determine the presence or
absence of hazardous materials on or within the Subject Property. Purchaser hereby (a) agrees that
Purchaser is relying solely on its own investigation, if any, of the Subject Property covering the
effect of any hazardous materials that may be on about or within the Subject Property, whether
disclosed by such investigations or not (collectively, the “Hazardous Materials Effect”) and (b)
assumes the risk of any and all liabilities, claims, demands, suits, judgments, losses, damages,
expenses (including, without limitation, attorney’s fees) and other obligations arising out of or
incurred in connection with the Hazardous Materials Effect, if any.

     15. Assignment. Purchaser may not assign its rights under this Agreement without the prior
written consent of Seller; provided, however, Purchaser may assign its rights under this Agreement
to (i) Columbia Equity Trust, Inc. (the “REIT”), (ii) Columbia Equity, L.P. (the “OP”), or (iii)
any trust, corporation, partnership or limited liability company controlling, controlled by or
under common control with Purchaser, the REIT or the OP. For purposes hereof, “control” shall mean
ownership (directly or indirectly) of 51% or more of the voting or comparable ownership interest of
any such trust, corporation, partnership or limited liability company. Any assignment shall be
subject to all the provisions, terms, covenants and conditions of this Agreement and the assignor
shall, in any event, continue to be and remain liable under this Agreement, as it may be amended
from time to time, as a principal and not as a surety, without notice to such assignor. Any such
assignment and assumption shall be evidenced by a written agreement in form and substance
reasonably acceptable to Seller.

     16. Non-Recourse to Partners of Partnership. Seller and Purchaser agree that the neither the
general partner nor any limited partner of Seller shall be personally liable for any obligations
under this Agreement or any document executed in connection herewith.

     17. Catastrophic Environmental Event. If, after the Contingency Date and prior to the Closing
Date, any Catastrophic Environmental Event (as defined below) occurs with respect to the Subject
Property, Seller shall give notice to Purchaser of such fact promptly after Seller becomes aware of
such occurrence. Thereafter, at Purchaser’s option (to be exercised by Purchaser’s written notice
to Seller given within thirty (30) days after Seller’s initial notice to Purchaser), this Agreement
shall terminate.

15

 

In the event of any such termination of this Agreement, neither party will have
any further obligations under
this Agreement (other than the Surviving Indemnity Obligations, which obligations shall
survive any such termination), except that Purchaser shall, at the request of Seller, execute any
document reasonably requested by Seller to evidence such termination including, without limitation,
a quit claim deed. If Purchaser fails to elect to terminate this Agreement in the manner provided
in this Section 17, then there shall be no reduction in the Purchase Price, and the parties
shall proceed to Closing upon the terms and conditions of this Agreement. For purposes of this
Section 17, the phrase “Catastrophic Environmental Event” means an adverse environmental
event on the Subject Property resulting in a violation of applicable environmental laws requiring
cleanup. Notwithstanding the foregoing, an adverse environmental event shall not be a Catastrophic
Environmental Event if a “no further action” letter addressed to Seller or a “no association”
letter addressed to Purchaser, or their equivalents, has been received from the relevant
governmental authorities prior to Closing.

     18. Notices. Any notice or other communication in connection with this Agreement shall be in
writing and shall be sent by nationally recognized overnight courier guaranteed next business day
delivery, by telecopy or facsimile transmission (provided that such notice sent by facsimile is
also sent via nationally recognized overnight courier for guaranteed next business day delivery),
or by personal delivery, properly addressed as follows:

	 	 	 	 	 
	 

	 	If to Seller:
	 	OPUS REAL ESTATE VIRGINIA III, L.L.C.
	 

	 	 	 	10350 Bren Road West
	 

	 	 	 	Minnetonka, MN 95343
	 

	 	 	 	Attn: Andrew C. Deckas
	 

	 	 	 	Facsimile No.: (952) 656-4750
	 
	 	 	 	 
	 

	 	With a copy to:
	 	Opus L.L.C.
	 

	 	 	 	10350 Bren Road West
	 

	 	 	 	Minnetonka, MN 55343
	 

	 	 	 	Attn: Legal Department
	 

	 	 	 	Facsimile No.: (952) 656-4755
	 
	 	 	 	 
	 

	 	And a copy to:
	 	Briggs and Morgan, Professional Association
	 

	 	 	 	2200 IDS Center
	 

	 	 	 	Minneapolis, MN 55402
	 

	 	 	 	Attn: David G. Greening
	 

	 	 	 	Facsimile No. (612) 977-8650
	 
	 	 	 	 
	 

	 	If to Purchaser:
	 	Carr Capital Corporation
	 

	 	 	 	1750 H Street, NW, Suite 500
	 

	 	 	 	Washington, D.C. 20006
	 

	 	 	 	Attn: Oliver T. Carr, III
	 

	 	 	 	Facsimile No.: (202) 303-3078
	 
	 	 	 	 
	 

	 	With a copy to:
	 	Hunton &Williams LLP
	 

	 	 	 	1900 K Street, NW
	 

	 	 	 	Washington, D.C. 20006-1109
	 

	 	 	 	Attn: John M. Ratino, Esq.
	 

	 	 	 	Facsimile No.: (202) 828-3779

All notices shall be deemed given one (1) business day following deposit if delivered to an
overnight courier guaranteeing next day delivery and on the same day if sent by personal delivery
or by telecopy or facsimile transmission (with proof of transmission).

16

 

Attorneys for each party
shall be authorized to give
notices for each such party. Notwithstanding anything herein to the contrary, in the event any
notice is required hereunder within a period of less than three (3) business days, such notice
shall be given by facsimile transmission, personal delivery or overnight courier, all as provided
above. Any party may change its address for the service of notice by giving written notice of such
change to the other party, in any manner above specified.

     19. Captions. The section headings or captions appearing in this Agreement are for
convenience only, are not a part of this Agreement, and are not to be considered in interpreting
this Agreement.

     20. Entire Agreement; Modification. This Agreement constitutes the entire agreement between
the parties with respect to the subject matter herein contained, and all prior negotiations,
discussions, writings and agreements between the parties with respect to the subject matter herein
contained are superseded and of no further force and effect. No covenant, term or condition of
this Agreement shall be deemed to have been waived by either party, unless such waiver is in
writing signed by the party charged with such waiver.

     21. Binding Effect. This Agreement shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and permitted assigns.

     22. Controlling Law. This Agreement shall be governed by and construed in accordance with the
laws of the Commonwealth of Virginia.

     23. Severability. The unenforceability or invalidity of any provisions hereof shall not
render any other provision herein contained unenforceable or invalid.

     24. “As Is” Sale. PURCHASER ACKNOWLEDGES THAT EXCEPT AS SET FORTH IN SECTION 5 OF THIS
AGREEMENT (A) NEITHER SELLER, NOR ANY OWNER, PRINCIPAL, AGENT, ATTORNEY, EMPLOYEE, BROKER, OR OTHER
REPRESENTATIVE OF SELLER, HAS MADE ANY REPRESENTATION OR WARRANTY OF ANY KIND WHATSOEVER, EITHER
EXPRESS OR IMPLIED, WITH RESPECT TO THE SUBJECT PROPERTY OR ANY MATTER RELATED THERETO, AND (B)
PURCHASER IS NOT RELYING ON ANY WARRANTY, REPRESENTATION, OR COVENANT, EXPRESS OR IMPLIED, WITH
RESPECT TO THE CONDITION OF THE SUBJECT PROPERTY, AND THAT PURCHASER IS ACQUIRING THE SUBJECT
PROPERTY IN ITS “AS-IS” CONDITION WITH ALL FAULTS, AND (C) PURCHASER RELEASES SELLER FROM ANY
CLAIMS, DAMAGES OR LIABILITIES RELATING TO THE CONDITION OF THE SUBJECT PROPERTY. IN PARTICULAR,
BUT WITHOUT LIMITATION, EXCEPT AS SET FORTH IN SECTION 5 OF THIS AGREEMENT, SELLER MAKES NO
REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE USE, CONDITION, OCCUPATION OR MANAGEMENT OF THE
SUBJECT PROPERTY, COMPLIANCE OF THE SUBJECT PROPERTY WITH APPLICABLE STATUTES, LAWS, CODES,
ORDINANCES, REGULATIONS OR REQUIREMENTS OR COMPLIANCE OF THE SUBJECT PROPERTY WITH COVENANTS,
CONDITIONS, AND RESTRICTIONS, WHETHER OR NOT OF RECORD. PURCHASER’S WAIVERS APPLY TO ALL CLAIMS OF
ANY NATURE WHATSOEVER, WHETHER KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED, ABSOLUTE OR CONTINGENT,
AND WHETHER OR NOT DISCOVERABLE BY PURCHASER, THAT PURCHASER NOW HOLDS OR MAY HOLD AT ANY TIME IN
THE FUTURE.

17

 

     25. Indemnification for Lease Claims. Seller will indemnify, defend and hold harmless
Purchaser from any and all liabilities, claims, damages, costs or expenses (including reasonable
attorneys’ fees) arising from claims by Tenants under the Lease as a result of any obligations and
duties of the
landlord thereunder arising prior to the Closing Date, except for claims relating to the
physical condition of the Subject Property or any Hazardous Materials Effect. Purchaser and will
indemnify, defend and hold harmless Seller from any and all liabilities, claims, damages, costs or
expenses (including reasonable attorneys’ fees) arising from claims by Tenants under the Lease as a
result of any obligations and duties of landlord thereunder arising on or after the Closing Date.
The indemnification obligations contained in this Section 25 shall survive Closing.

     26. Time of Essence. Time is of the essence of this Agreement.

     27. Counterparts. This Agreement may be executed in any number of counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and the same
instrument.

     28. Interpretation. In the event an ambiguity or question of intent or interpretation arises,
this Agreement shall be construed as if drafted jointly by the parties hereto and no presumption or
burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any of
the provisions of this Agreement.

     29. Return of Documents; Confidentiality; Exclusivity. In the event that this Agreement is
terminated or cancelled without Purchaser acquiring the Subject Property pursuant to the terms
hereof, Purchaser shall, within five (5) business days thereafter, deliver to Seller all due
diligence materials delivered by Seller to Purchaser. Prior to the Closing, Purchaser agrees not
to disclose any due diligence materials to third parties, except that Purchaser may disclose such
information to (i) those employed or engaged by Purchaser in connection with Purchaser’s due
diligence investigations, (ii) to Purchaser’s attorneys, potential lenders, title and escrow
officers and others involved in connection with the transactions described in this Agreement, (iii)
to Seller’s directors, officers, shareholders, partners, subsidiaries and other affiliates, (iv) to
the extent required by law (including disclosure by the REIT, as determined in Purchaser’s sole
discretion, in any registration statement or other filing with the U.S. Securities and Exchange
Commission), subpoena or court order. Purchaser shall indemnify, defend and hold Seller harmless
from and against any and all claims, demands, causes of action, losses, damages, liabilities,
judgments, costs and expenses (including attorney’s fees) asserted against or incurred by Seller as
a result of any violation of, or failure to comply with this Section 29. Seller agrees
that during the continuance of this Agreement, Seller shall not offer the Subject Property (or any
interest therein) for sale or lease, except for lease of commercial, office or industrial space in
the ordinary course of business, to any other party, or negotiate, solicit or entertain any offers
to purchase or lease the Subject Property (or any interest therein) other than lease of commercial,
office or industrial space in the ordinary course of business The obligations in this Section
29 shall survive Closing or termination of this Agreement.

     30. IRS Reporting Requirements. Seller and Purchaser acknowledge and agree that Section
6045(e) of the Internal Revenue Code of 1986 requires that notice of the sale and purchase of the
Subject Property described in this Agreement, be provided to the Internal Revenue Service (the
“IRS”) by preparation of and filing with the IRS of one or more IRS Form 1099-B; and further,
Seller and Purchaser agree to furnish and provide the Title Company any and all information and
documentation, including without limitation the Designation Agreements, that the Title Company may
require in order for the Title Company to (a) comply with all instructions to the IRS Forms 1099-B
in the preparation thereof, and (b) prepare and timely file with the IRS said IRS Forms 1099-B with
respect to this transaction.

     31. Attorneys’ Fees. If either party commences an action against the other to enforce this
Agreement or because of the breach by either party of this Agreement, the prevailing party in such
action shall be entitled to recover reasonable attorney fees, costs, and expenses (including expert
fees and costs) incurred in connection with the prosecution or defense of such action, including
any appeal, in addition to all other relief.

18

 

     32. Schedule and Exhibits. The following schedule and exhibits are made a part hereof, with
the same force and effect as if specifically set forth herein:

	 	 	 	 	 	 	 
	 

	 	Exhibit A
	 	-
	 	Legal Description
	 

	 	Exhibit B
	 	-
	 	Schedule of Lease
	 

	 	Exhibit B-1
	 	-
	 	Outstanding Broker Commissions
	 

	 	Exhibit C
	 	-
	 	Schedule of Permits
	 

	 	Exhibit D
	 	-
	 	Schedule of Service Contracts
	 

	 	Exhibit E
	 	-
	 	Schedule of Warranties
	 

	 	Exhibit F
	 	-
	 	Form of Earnest Money Escrow Agreement
	 

	 	Exhibit G
	 	-
	 	Intentionally Omitted
	 

	 	Exhibit H
	 	-
	 	Form of Tenant Estoppel Certificate
	 

	 	Exhibit I
	 	-
	 	Form of Special Warranty Deed
	 

	 	Exhibit J
	 	-
	 	Form of Assignment and Assumption of Lease
	 

	 	Exhibit K
	 	-
	 	Form of Assignment and Assumption of Contracts and Project Documents
	 

	 	Exhibit L
	 	-
	 	List of Environmental Reports
	 

	 	Exhibit M
	 	-
	 	Additional Information
	 

	 	Exhibit N
	 	-
	 	Tenant Notice

[Signature Pages Follow]

19

 

     IN WITNESS WHEREOF, Seller and Purchaser have executed this Agreement as of the day and year
first above written.

	 	 	 	 	 
	 	 	SELLER:
	 
	 	 	 	 
	 	 	OPUS REAL ESTATE VIRGINIA III, L.L.C., a Delaware
	 	 	limited liability company
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Andrew C. Dekas
	 	 	Name: Andrew C. Dekas
	 	 	Its: Vice President

     Opus Real Estate III Limited Partnership, a Delaware limited partnership (“Partnership”)
hereby joins this Agreement for the sole purpose of agreeing to perform, and to be jointly and
severally liable for the performance of, Seller’s obligations under the Warranty set forth in
Section 6(b) of the foregoing Agreement provided, that in no event shall Partnership’s total
liability under this joinder paragraph exceed Seven Hundred Fifty and No/100 Dollars ($750,000.00).

	 	 	 	 	 
	 	 	OPUS REAL ESTATE III LIMITED PARTNERSHIP, 
	 	 	a Delaware limited partnership
	 
	 	 	 	 
	 	 	By: OPUS REAL ESTATE, L.L.C., a Delaware limited liability company
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Andrew C. Dekas
	 	 	Name: Andrew C. Dekas
	 	 	Its: Vice President

[Signature Page to Purchase Agreement (Westfields)]

 

 

     IN WITNESS WHEREOF, Seller and Purchaser have executed this Agreement as of the day and year
first above written.

	 	 	 	 	 
	 	 	PURCHASER:
	 
	 	 	 	 
	 	 	CARR CAPITAL CORPORATION, a

District of Columbia corporation
	 
	 	 	 	 
	 

	 	By:
	  /s/ Oliver T. Carr, III	 
	 	 	Name: Oliver T. Carr, III
	 	 	Title: President

[Signature Page to Purchase Agreement (Westfields)]

 

 

Exhibit A

Legal Description

All of that certain lot or parcel of land situated, lying and being in Fairfax County, Virginia,
and being more particularly described as follows:

PARCEL 31B-2, Westfields International Corporate Center at Dulles, containing 6.2703 acres, more or
less, as shown on a plat attached to a Deed of Resubdivision recorded in Deed Book 10120 at Page
452 among the land records of Fairfax County, Virginia.

LESS AND EXCEPT those portions dedicated for public street purposes within the Deed of Dedication,
Easement and Vacation recorded in Deed Book 10978 at page 1218 among the aforesaid land records.

A-1

 

Exhibit B

Schedule of Lease 

Lease in favor of Veridian Information Solutions, Inc., as tenant, dated July 25, 2000, amended
November 30, 2000.

1. Office Deed of Lease Agreement dated 07/25/00

2. Commencement Date Memo dated 02/06/01

3. Guaranty of Lease by Veridian Corporation

4. Amendment to Office Deed of Lease Agreement dated 11/30/00

B-1

 

Exhibit B-1

Outstanding Broker Commissions (Lease)

None.

B-1-1

 

Exhibit C

Schedule of Permits 

	1.	 	Fairfax County construction permit dated June 28, 1999

	 
	2.	 	Fairfax County tenant improvement permit dated November 17, 2000

C-1

 

Exhibit D

Schedule of Service Contracts 

	 	 	 
	Service Provider:

	 	Mid-Atlantic Power Specialists, Inc.
	Service Provided:

	 	Infrared Scanning of Electrical Distribution Equipment
	Term of Agreement:

	 	9/1/04 thru 8/31/05
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	Otis Elevator Co.
	Service Provided:

	 	Elevator Maintenance
	Term of Agreement:

	 	4/1/04 thru 3/31/09
	Cancellation Option:

	 	No
	 
	 	 
	Service Provider:

	 	Kastle Systems LLC
	Service Provided:

	 	Fire Panel Monitoring System
	Term of Agreement:

	 	1/1/2005 thru 12/31/05
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	Chesapeake Protection Services, Inc.
	Service Provided:

	 	Inspection, Testing and Maintenance of Sprinkler and Fire
	Term of Agreement:

	 	9/1/04 thru 8/31/05
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	A-1 Lawn and Landscaping
	Service Provided:

	 	Exterior Landscape Maintenance
	Term of Agreement:

	 	3/1/05 thru 2/24/06
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	A-1 Lawn and Landscaping
	Service Provided:

	 	Snow Removal
	Term of Agreement:

	 	11/1/04 thru 10/31/05
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	Ilex Woodcare
	Service Provided:

	 	Millwork Maintenance
	Term of Agreement:

	 	11/1/04 thru 10/31/05
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	Western Pest Services
	Service Provided:

	 	Exterminating
	Term of Agreement:

	 	3/1/05 thru 2/29/06
	Cancellation Option:

	 	30 day notice
	 
	 	 
	Service Provider:

	 	Kevco Building Services, Inc.
	Service Provided:

	 	Exterior & Interior Window Washing Service
	Term of Agreement:

	 	5/1/05 thru 6/30/05
	Cancellation Option:

	 	Yes, delivery of notice

D-1

 

Exhibit E

Schedule of Warranties

	 	 	 	 	 
	Item

	 	Company
	 	Expiration Date
	 
	 	 	 	 
	Roofing System

	 	Firestone
	 	1/06/2010

E-1

 

Exhibit F

Earnest Money Escrow Agreement

     THIS
EARNEST MONEY ESCROW AGREEMENT (“Agreement”) is made as of
 ___ ___, 2005,
by and among OPUS REAL ESTATE VIRGINIA III, L.L.C., a Delaware limited liability company
(“Seller”), CARR CAPITAL CORPORATION, a District of Columbia corporation (“Purchaser”), and FIRST
AMERICAN TITLE INSURANCE COMPANY, a California corporation (“Escrow Agent”).

RECITALS:

     A. By that certain Purchase Agreement dated as of June ___, 2005 (“Purchase Agreement”),
between Seller and Purchaser, Seller has agreed to sell to Purchaser and Purchaser has agreed to
purchase from Seller all of Seller’s right, title and interest in and to the Subject Property, upon
and subject to the terms and provisions set forth in the Purchase Agreement. Pursuant to the terms
and provisions of the Purchase Agreement, Purchaser has agreed to deposit into escrow with Escrow
Agent the sum in cash of $200,000 earnest money as Initial Earnest Money (as defined therein) and
the sum in cash of $300,000 earnest money as Additional Earnest Money (as defined therein)
(together with the interest thereon less any investment fees related thereto, the Initial Earnest
Money and Additional Earnest Money shall be referred to as the “Earnest Money”), to be held,
invested and disbursed by Escrow Agent in accordance with the terms and conditions of this
Agreement.

     B. Escrow Agent has agreed to act as escrow agent to hold, administer, invest and disburse the
Earnest Money on the terms and conditions herein set forth.

     C. Unless otherwise provided herein, all capitalized words and terms used herein shall have
the same meanings ascribed to such words and terms as in the Purchase Agreement.

AGREEMENTS:

     NOW THEREFORE, in consideration of the mutual covenants and agreements hereinafter set forth
and other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

     1. Escrow Agent shall notify Seller and Purchaser in writing upon Escrow Agent’s receipt of
either the Earnest Money or the Additional Earnest Money promptly upon Escrow Agent’s receipt of
the same.

     2. Escrow Agent shall hold, administer and disburse the Earnest Money pursuant to this
Agreement. Escrow Agent, in accordance with written instructions to it from time to time from
Purchaser, shall invest, and from time to time reinvest, the Earnest Money as so instructed by
Purchaser.

     3. Purchaser’s Tax Identification Number is                     .

     4. Escrow Agent shall not be responsible for any penalties or loss of interest or any delays
in withdrawing funds which may be incurred upon withdrawal of the Earnest Money in accordance with
instructions given hereunder except to the extent attributable to Escrow Agent’s negligence.

F-1

 

     5.    (a) Upon not less than five (5) business days’ prior written notice executed by Seller and
delivered to both Purchaser and Escrow Agent in accordance with Section 7 below, asserting
that Seller is
entitled to retain the Earnest Money pursuant to the terms of the Purchase Agreement, Escrow
Agent shall deliver the Earnest Money to Seller; provided, however, that if Purchaser shall, within
said 5 business day period, deliver to Seller and Escrow Agent a written notice that it disputes
Seller’s claim to the Earnest Money, Escrow Agent shall retain the Earnest Money until it receives
written instructions executed by both Seller and Purchaser as to the disposition and disbursement
of the Earnest Money, or until ordered by final court, decree or judgment in a proceeding in which
Purchaser and Seller are parties, which is not subject to appeal, to deliver the Earnest Money to a
particular party, in which event the Earnest Money shall be delivered in accordance with such
notice, instruction, order, decree or judgment.

          (b) Upon not less than five (5) business days’ prior written notice executed by Purchaser and
delivered to Seller and Escrow Agent in accordance with Section 7 below, asserting that
Purchaser is entitled to the return of the Earnest Money pursuant to the terms of the Purchase
Agreement, Escrow Agent shall deliver the Earnest Money to Purchaser; provided, however, that if
Seller shall, within said 5 business day period, deliver to Purchaser and Escrow Agent a written
notice that it disputes Purchaser’s claim or right to receive back the Earnest Money, Escrow Agent
shall retain the Earnest Money until it receives written instructions executed by both Seller and
Purchaser as to the disposition and disbursement of the Earnest Money, or until ordered by final
court order, decree or judgment in which Purchaser and Seller are parties, which is not subject to
appeal, to deliver the Earnest Money to a particular party, in which event the Earnest Money shall
be delivered in accordance with such notice, instruction, order, decree or judgment.

          (c) Subject to the foregoing, this Agreement shall at all times be subject to the joint order
of Seller and Purchaser and upon such joint order Escrow Agent shall deliver the Earnest Money as
instructed by such joint order.

     6. Seller and Purchaser shall each be responsible for payment of one-half of any escrow fee
hereunder. Purchaser shall be responsible for payment of any investment fee.

     7. Any notice or other communication in connection with this Agreement shall be in writing and
shall be sent by United States Certified Mail, return receipt requested, postage prepaid, by
nationally recognized overnight courier guarantee next day delivery, by telecopy, or by personal
delivery, properly addressed as follows:

	 	 	 	 	 
	 

	 	If to Seller:
	 	Opus Real Estate Virginia III, L.L.C.
	 

	 	 	 	10350 Bren Road West
	 

	 	 	 	Minneapolis, MN 55343
	 

	 	 	 	Attn: Vice President
	 

	 	 	 	Facsimile No.: (952) 656-4750
	 
	 	 	 	 
	 

	 	With a copy to:
	 	Opus, L.L.C.
	 

	 	 	 	10350 Bren Road West
	 

	 	 	 	Minnetonka, Minnesota 55343
	 

	 	 	 	Attn: Legal Department
	 

	 	 	 	Facsimile No.: (952) 656-4750
	 
	 	 	 	 
	 

	 	And a copy to:
	 	Briggs and Morgan, P.A.
	 

	 	 	 	2200 IDS Center
	 

	 	 	 	Minneapolis, MN 55402
	 

	 	 	 	Attn: David G. Greening
	 

	 	 	 	Facsimile No.: (612) 977-8650

F-2

 

	 	 	 	 	 
	 

	 	If to Purchaser:
	 	Carr Capital Corporation
	 

	 	 	 	1750 H Street, NW, Suite 500
	 

	 	 	 	Washington, D.C. 20006
	 

	 	 	 	Attn: Oliver T. Carr, III
	 

	 	 	 	Facsimile No.: (202) 303-3078
	 
	 	 	 	 
	 

	 	With a copy to:
	 	Hunton &Williams LLP
	 

	 	 	 	1900 K Street, NW
	 

	 	 	 	Washington, D.C. 20006-1109
	 

	 	 	 	Attn: John M. Ratino, Esq.
	 

	 	 	 	Facsimile No.: (202) 828-3779
	 
	 	 	 	 
	 

	 	If to Escrow Agent:
	 	First American Title Insurance Company
	 

	 	 	 	1900 Midwest Plaza West
	 

	 	 	 	801 Nicollet Mall
	 

	 	 	 	Minneapolis, MN 55402
	 

	 	 	 	Attn: Rodney D. Ives
	 

	 	 	 	Facsimile No.: (612) 305-2001

     All notices shall be deemed given three (3) business days following deposit in the United
States mail with respect to certified or registered letters, one (1) business day following deposit
if delivered to an overnight courier guaranteeing next day delivery and on the same day if sent by
personal delivery or telecopy (with proof of transmission). Attorneys for each party shall be
authorized to give notices for each such party. Any party may change its address for the service
of notice by giving written notice of such change to the other party, in any manner above
specified.

     8. This Agreement shall be binding upon and inure to the benefit of the parties hereto and
their respective successors and permitted assigns under the Purchase Agreement.

     9. This Agreement shall be governed by and construed in accordance with the laws of the
Commonwealth of Virginia. In the event that any provision hereof shall be deemed illegal or
unenforceable, said provision shall be severed herefrom and the remainder of this Agreement shall
be enforced in accordance with the intentions of the parties as herein expressed.

     10. This Agreement may not be amended or altered except by an instrument in writing executed
by all the parties hereto.

     11. Except as to deposits of funds for which Escrow Agent has received express written
direction concerning investment or other handling, the parties hereto agree that the Escrow Agent
shall invest the Earnest Money in Escrow Agent’s customary money market account; provided, however,
nothing herein shall diminish Escrow Agent’s obligation to apply the full amount of the deposit
together with interest thereon in accordance with the terms of these escrow trust instructions.

     12. If any party shall bring suit against the other to enforce the terms of this Agreement,
the losing party shall pay to the prevailing party the prevailing party’s costs and expenses
(including, without limitation, reasonable attorneys’ fees and costs) incurred in enforcing this
Agreement.

[Signature Page Follows]

F-3

 

     IN WITNESS WHEREOF, Seller, Purchaser and Escrow Agent have executed this Agreement as of the
day and year first above written.

	 	 	 	 	 
	 	 	SELLER:
	 
	 	 	 	 
	 	 	OPUS REAL ESTATE VIRGINIA III, L.L.C., a 
Delaware limited liability company
	 
	 	 	 	 
	 

	 	By:	 	 
	 	 	 	 
	 

	 	Name:	 	 
	 	 	 	 
	 

	 	Its:	 	 
	 	 	 	 

F-4

 

     IN WITNESS WHEREOF, Seller, Purchaser and Escrow Agent have executed this Agreement as of the
day and year first above written.

	 	 	 	 	 
	 	 	PURCHASER:
	 
	 	 	 	 
	 	 	CARR CAPITAL CORPORATION, a

District of Columbia corporation
	 
	 	 	 	 
	 

	 	By:	 	 
	 	 	 	 
	 

	 	Name:	 	 
	 	 	 	 
	 

	 	Title:	 	 
	 	 	 	 

F-5

 

     IN WITNESS WHEREOF, Seller, Purchaser and Escrow Agent have executed this Agreement as of the
day and year first above written.

	 	 	 	 	 
	 	 	ESCROW AGENT:
	 
	 	 	 	 
	 	 	FIRST AMERICAN TITLE INSURANCE
 COMPANY, a California corporation
	 
	 	 	 	 
	 

	 	By:	 	 
	 	 	 	 
	 

	 	Name:	 	 
	 	 	 	 
	 

	 	Its:	 	 
	 	 	 	 

F-6

 

Exhibit G

INTENTIONALLY OMITTED

G-1

 

Exhibit H

Tenant’s Estoppel Certificate

June ___, 2005          

Carr Capital Corporation (“Purchaser”)

1750 H Street, NW

Suite 500

Washington, D.C. 20006

	 	 	 
	Re:

	 	Proposed Sale
	 

	 	Name of Subject Property: Westfields Corporate Center
	 

	 	Address: 14700 Lee Road, Chantilly VA

Ladies and Gentlemen:

     It is our understanding that Purchaser proposes to buy the subject premises from Opus
Real Estate Virginia III, L.L.C. (“ORE VA”) and as a condition precedent thereof Purchaser and ORE
VA have required this certification of the undersigned.

     The undersigned, as Tenant, under that certain Deed of Office Lease Agreement, dated July 23,
2000, made with Opus East, L.L.C. (the predecessor in interest to ORE VA), as Landlord, (as amended
by that Amendment to Office Deed of Lease Agreement, dated November 30, 2000, the “Lease”), hereby
ratifies the Lease and certifies that:

	 	1.	 	The current annual Basic Rent payable pursuant to the terms of said
lease is $                      per annum; and further, additional rental pursuant to said
lease is payable s follows: Tenant pays its pro-rata share of Excess Expenses;
and
	 
	 	2.	 	The Lease is in full force and effect and has not been assigned,
modified, supplemented or amended in any way; and
	 
	 	3.	 	A true and correct copy thereof is attached hereto as Exhibit A. The
Lease represents the entire agreement between the parties as to the leasing of
the premises; and
	 
	 	4.	 	On this date there are no existing defenses or offsets, claims or
counterclaims which the undersigned has against the enforcement of the Lease by
Landlord; and
	 
	 	5.	 	No rental has been paid in advance and no security (except the security
deposit in the amount of $160,486.08) has been deposited with Landlord; and
	 
	 	6.	 	The total rentable floor area of the Premise is 84,652 square feet,
subject to adjustment as set forth in Section 1.1 of said lease; and
	 
	 	7.	 	On this date there are no existing breaches or defaults by Landlord or
Tenant under the Lease that are known to Tenant; and
	 
	 	8.	 	The term of the Lease commenced on                      and will terminate on
                    ; and
	 
	 	9.	 	Tenant’s current address for notice under the Lease is:
                                                                                                                                    .

H-1

 

     IN WITNESS WHEREOF, the undersigned has caused this certificate to be executed as of the ___
day of                      , 2005.

	 	 	 	 	 
	 	 	Veridian Information Solutions, Inc. Tenant
	 
	 	 	 	 
	 

	 	By	 	 
	 	 	 	 
	 

	 	Its	 	 
	 	 	 	 

H-2

 

Exhibit I

Form of Deed

	 	 	 
	 

	 	This document was prepared outside
	 

	 	the Commonwealth of Virginia by:
	 
	 	 
	 	 	 
	 
	 	 
	 	 	 

DEED

     THIS DEED is made this ___day of                     , 2005, by and between OPUS REAL ESTATE VIRGINIA
III, L.L.C., a Delaware limited liability company (“Grantor”), and CARR CAPITAL CORPORATION, a
                                                             (“Grantee”),

     WITNESSETH, that in consideration of the sum of Ten Dollars ($10.00) in hand paid by Grantee,
the receipt and sufficiency of which are acknowledged by Grantor, Grantor does hereby grant and
convey in fee simple, with Special Warranty, unto Grantee, its successors and assigns, all those
lots or parcels of land situate, lying, and being in Fairfax County, Virginia, and being more
particularly described on Exhibit “A” which is attached to and made a part of this Deed (the
“Land”).

     TOGETHER WITH all the buildings and improvements thereupon erected, made or being and all and
every one of the rights, ways, waters, privileges, easements, appurtenances and advantages to the
same belonging or in anywise appertaining (the Land and all of the foregoing being referred to as
the “Property”).

     SUBJECT TO all matters of record affecting the Property.

     TO HAVE AND TO HOLD the Property unto and to the only proper use, benefit and behalf of the
Grantee, its successors and assigns, in fee simple, forever.

     AND Grantor warrants specially the Property hereby conveyed and covenants that Grantor will,
on demand of the Grantee, its successors and assigns, at the expense of the Grantee, execute any
instrument necessary for the further assurance of the title to the Property that may be required.

	 	 	 	 	 	 	 
	 

	 	Consideration:
	 	$	24,150,000	 
	 
	 	 	 	 	 	 
	 

	 	Grantee’s Address:	 	 	 	 
	 
	 	 	 	 	 	 
	 

	 	Property Address:
	 	14700 Lee Road, Chantilly, Virginia

	 
	 	 	 	 	 	 
	 

	 	Return to:	 	 	 	 

I-1

 

     WITNESS the following signature and seal:

	 	 	 	 	 	 	 
	WITNESS:	 	 	 	GRANTOR:
	 	 	 	 	OPUS REAL ESTATE VIRGINIA III, L.L.C.,
	 	 	 	 	a Delaware limited liability company
	 
	 	 	 	 	 	 
	 

	 	 	 	By:	 	 
	 	 	 	 	 	 
	 

	 	 	 	Name:	 	 
	 	 	 	 	 	 
	 

	 	 	 	Title:	 	 
	 	 	 	 	 	 

* * *

	 	 	 	 	 
	STATE OF MINNESOTA

	 	)	 	 
	 

	 	) ss.

	COUNTY OF HENNEPIN

	 	)	 	 

     The foregoing instrument was acknowledged before me on                                         , 2005, by
                                        , the Vice President of Opus Real Estate Virginia III, L.L.C., a Delaware
limited liability company, on behalf of the limited liability company.

	 	 	 
	 	 	 
	 

	 	Notary Public

I-2

 

EXHIBIT A TO SPECIAL WARRANTY DEED

Legal Description

All of that certain lot or parcel of land situated, lying and being in Fairfax County,
Virginia, and being more particularly described as follows:

PARCEL 31B-2, Westfields International Corporate Center at Dulles, containing 6.2703 acres, more or
less, as shown on a plat attached to a Deed of Resubdivision recorded in Deed Book 10120 at Page
452 among the land records of Fairfax County, Virginia.

LESS AND EXCEPT those portions dedicated for public street purposes within the Deed of Dedication,
Easement and Vacation recorded in Deed Book 10978 at page 1218 among the aforesaid land records.

I-1

 

EXHIBIT J

ASSIGNMENT AND ASSUMPTION OF LEASE

     THIS ASSIGNMENT AND ASSUMPTION OF LEASE (“Assignment”) is made as of                                         ,                     
(“Effective Date”), by and between                                                             , a                      (“Assignor”), and
                                                            , a                                          (“Assignee”).

RECITALS:

     A. Assignee has acquired from Assignor title to that certain real property, and any
improvements situated thereon owned by Assignor, more particularly described on Exhibit “A”
attached hereto (“Property”) pursuant to a Purchase Agreement dated as of                                         ,
2005 by and between Assignor, and Assignee (the “Purchase Agreement”).

     B. In connection with the conveyance of the Property from Assignor to Assignee, Assignor and
Assignee intend and agree that, except as provided below, all of Assignor’s rights as lessor under
the lease, together with all amendments or modifications thereto, including the rights to all
security deposits, letters of credit, delinquent rents and charges, prepaid rents and all
guaranties thereof, as set forth on Exhibit “B” attached hereto (the “Lease”), shall be
assigned to Assignee.

     C. Assignee has agreed to assume all of the obligations of Assignor under the Lease as set
forth herein.

AGREEMENT:

     In consideration of the foregoing recitals and other good and valuable consideration, Assignor
and Assignee agree as follows:

     2. Assignment by Assignor. Assignor hereby assigns and transfers to Assignee all
right, title and interest of Assignor in and to each of the Lease together with any rights relating
thereto, including without limitation all rents, issues, profits therefrom, all guaranties thereof
and all security deposits and letters of credit relating thereto. Notwithstanding the foregoing,
Assignor reserves the right to enforce against the tenant under the Lease all obligations or duties
of such tenants that arose or accrued prior to the Effective Date, provided, however, in no event
shall Assignor terminate the Lease or disturb tenant’s right to occupy its premises as a result of
Assignor’s enforcement of such reserved rights.

     3. Acceptance of Assignment. Assignee hereby accepts the assignment of the Lease and
assumes and agrees to keep, perform and fulfill all of the duties, covenants, provisions,
conditions and obligations of the landlord in the Lease which arise or are incurred or are related
to events occurring from and after the Effective Date. Without limiting the foregoing, Assignee
agrees to indemnify, defend and hold harmless Assignor with respect to any claims or demands made
by tenant under the Lease with respect to return of any security deposits made by such tenants, to
the extent Assignor provided such deposits at Closing.

     4. Successors and Assigns. This Assignment shall be binding upon and inure to the
benefit of the parties hereto and their successors and assigns.

J-1

 

     5. Authority. Each of the parties signing this Assignment hereby warrants and
represents that it has the full legal power, authority and right to execute, deliver and perform
the obligations under
this Assignment, that this Assignment has been duly authorized by all requisite actions on the
part of such warranting party, and that no remaining action or third party action is required to
make this Assignment binding upon such party.

     6. Governing Law. This Assignment shall be construed and enforced in accordance with
the laws of the State in which the Property is located.

     7. Attorneys’ Fees. If either party commences litigation against the other for the
specific performance of this Assignment, the interpretation of this Assignment, for damages for the
breach hereof or otherwise for enforcement of any remedy hereunder, the parties hereto agree, in
the event of any such commencement of litigation, the prevailing party shall be entitled to recover
from the other party such costs and reasonable attorneys’ fees as may have been incurred. Any
attorneys’ fees incurred in enforcing any right of indemnity set forth in this Assignment shall be
recoverable and deemed to be within the scope of such indemnity and/or this attorneys’ fees
provision.

     8. Counterparts. This Assignment may be executed in any number of counterparts, each
of which, when so executed and when delivered, shall be an original, but all such counterparts
shall together constitute but one and the same instrument.

J-2

 

     Assignor and Assignee have executed this Assignment as of the Effective Date.

	 	 	 	 	 	 	 	 	 
	 	 	ASSIGNOR:	 	 
	 
	 	 	 	 	 	 	 	 
	 	 		 	 
	 
	 	 	 	 	 	 	,a 	 
	 	 	 	 	 
	 
	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	By	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	Its	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	ASSIGNEE:	 	 
	 
	 	 	 	 	 	 	 	 
	 	 		 	 
	 
	 	 	 	 	 	 	,a 	 
	 	 	 	 	 
	 
	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	By	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	Its	 	 	 	 
	 

	 	 	 	 	 	 	 	 

J-3

 

EXHIBIT “A” TO ASSIGNMENT AND ASSUMPTION OF LEASE

(Legal Description)

All of that certain lot or parcel of land situated, lying and being in Fairfax County, Virginia,
and being more particularly described as follows:

PARCEL 31B-2, Westfields International Corporate Center at Dulles, containing 6.2703 acres, more or
less, as shown on a plat attached to a Deed of Resubdivision recorded in Deed Book 10120 at Page
452 among the land records of Fairfax County, Virginia.

LESS AND EXCEPT those portions dedicated for public street purposes within the Deed of Dedication,
Easement and Vacation recorded in Deed Book 10978 at page 1218 among the aforesaid land records.

J-4

 

EXHIBIT “B” TO ASSIGNMENT AND ASSUMPTION OF LEASE

(Schedule of Lease)

Lease in favor of Veridian Information Solutions, Inc., as tenant, dated July 25, 2000, amended
November 30, 2000.

J-5

 

EXHIBIT K

ASSIGNMENT AND ASSUMPTION OF CONTRACTS

AND PROJECT DOCUMENTS

     THIS ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND PROJECT DOCUMENTS (“Assignment”) is made as of
                                        , 2005 (“Effective Date”), by and between                                         , a
                    (“Assignor”), and                     , a                                                              (“Assignee”).

RECITALS:

     A. Assignee has acquired from Assignor title to that certain real property, and any
improvements situated thereon owned by Assignor, more particularly described on Exhibit “A”
attached hereto (“Property”).

     B. In connection with the conveyance of the Property from Assignor to Assignee, Assignor and
Assignee intend and agree that Assignor’s right, title and interest in the agreements set forth on
Exhibit “B” attached hereto and all licenses, authorizations, approvals, permits,
entitlements, warranties, guaranties, approvals, certificates of occupancy, certificates, surveys
and reports, including, without limitation, any hazardous materials reports, engineering and soils
reports and any ALTA surveys, if any, in the possession of Assignor, relating to the acquisition,
construction, design, use, operation, management or maintenance of the Property (collectively, the
“Contracts and Project Documents”), to the extent assignable, shall inure to the benefit of and be
assigned and transferred to Assignee.

AGREEMENT:

     In consideration of the foregoing recitals and other good and valuable consideration, Assignor
and Assignee agree as follows:

     1. Assignment by Assignor. To the extent assignable, Assignor hereby assigns and
transfers to Assignee all right, title and interest of Assignor in the Contracts and Project
Documents, together with any rights owned by Assignor relating thereto. Notwithstanding the
foregoing, Assignor reserves the right to (a) enforce the provisions of the Contracts and Project
Documents in respect to all obligations or duties of the other party thereto that arose or accrued
prior to the Effective Date, and (b) exercise such rights under the Contracts and Project Documents
as are necessary in order for Assignor to fulfill its obligations under the Purchase Agreement
dated as of December 12, 2003 by and between Assignor, and Assignee, relating to the Property
(“Agreement”), provided, however, in no event shall Assignor terminate any of the Contracts and
Project Documents as a result of Assignor’s enforcement of such reserved rights.

     2. Limited License. Assignor grants to Assignee a limited license to use the plans
and specifications relating to the construction of the improvements on the Property in Assignor’s
possession for the purposes and subject to the conditions and indemnifications as set forth in the
Agreement.

     3. Acceptance of Assignment. Assignee hereby accepts the assignment of the Contracts
and Project Documents, and Assignee assumes and agrees to keep, perform and fulfill all of the
duties, covenants, provisions, conditions and obligations of Assignor contained therein which arise
or are incurred or are related to events occurring from and after the Effective Date.

K-1

 

     4. Successors and Assigns. This Assignment shall be binding upon and inure to the
benefit of the parties hereto and their successors and assigns.

     5. Authority. Each of the parties signing this Assignment hereby warrants and
represents that it has the full legal power, authority and right to execute, deliver and perform
the obligations under this Assignment, that this Assignment has been duly authorized by all
requisite actions on the part of such warranting party, and that no remaining action or third party
action is required to make this Assignment binding upon such party.

     6. Governing Law. This Assignment shall be construed and enforced in accordance with
the laws of the State in which the Property is located.

     7. Attorneys’ Fees. If either party commences litigation against the other for the
specific performance of this Assignment, the interpretation of this Assignment, for damages for the
breach hereof or otherwise for enforcement of any remedy hereunder, the parties hereto agree, in
the event of any such commencement of litigation, the prevailing party shall be entitled to recover
from the other party such costs and reasonable attorneys’ fees as may have been incurred. Any
attorneys’ fees incurred in enforcing any right of indemnity set forth in this Assignment shall be
recoverable and deemed to be within the scope of such indemnity and/or this attorneys’ fees
provision.

     8. Counterparts. This Assignment may be executed in any number of counterparts, each
of which, when so executed and when delivered, shall be an original, but all such counterparts
shall together constitute but one and the same instrument.

K-2

 

     Assignor and Assignee have executed this Assignment as of the Effective Date.

	 	 	 	 	 	 	 	 	 
	 	 	ASSIGNOR:	 	 
	 
	 	 	 	 	 	 	 	 
	 	 		 	 
	 
	 	 	 	 	 	 	,a 	 
	 	 	 	 	 
	 
	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	By	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	Its	 	 	 	 
	 

	 	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	ASSIGNEE:	 	 
	 
	 	 	 	 	 	 	 	 
	 	 		 	 
	 
	 	 	 	 	 	 	,a 	 
	 	 	 	 	 
	 
	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	By	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	Its	 	 	 	 
	 

	 	 	 	 	 	 	 	 

K-3

 

EXHIBIT “A” TO ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND

PROJECT DOCUMENTS

(Legal Description)

K-4

 

EXHIBIT “B” TO ASSIGNMENT AND ASSUMPTION OF CONTRACTS

AND PROJECT DOCUMENTS

(Certain Assigned Agreements)

Service Contracts:

     1.

Warranties:

K-5

 

EXHIBIT L

LIST OF ENVIRONMENTAL REPORTS

1. Phase I environmental site assessment prepared by SECOR, dated November 27, 2000

L-1

 

EXHIBIT M

Additional Information

14700 Lee Road

Requested Property Data

     9. The most recent ALTA survey for the Property;

     10. All executed leases (and amendments thereto) (the “Leases”) regarding all space
occupied by tenants at the Property (the “Tenants”);

     11. Copies of the tax and utility bills for the Property for calendar years 2003, 2004, and
2005;

     12. Operating statements (including operating expense information) prepared by the property
manager for the calendar years 2003, 2004 and 2005 YTD;

     13. The most recent environmental site assessment report;

     14. Construction and Design Documents: Base Building Documents (plans and specifications)
plus any revisions Tenant Improvement Plans Public Space Finish Specifications (if different from
Base Building Plans) Close out Manual for each TI project CADD drawings on disk, documentation and
plans for any subsequent renovations to the base building;

     15. Property Management: Control system plans as built and instructions Mechanical operation
and maintenance logs in Sellers possession;

     16. Copies of all warranties and warranty information;

     17. Certificate of occupancy/non-Residential Use Permits for the Property and all Tenant space
therein;

     18. Seller’s proposed operating budget for the Property for 2005;

     19. A current rent roll for the Property in the form currently maintained by Seller -
Received;

     20. List of all security deposits, rent abatements, and Landlord payments to the Tenants
(including but not limited to tenant improvement allowances and architectural fees for test fits);

     21. Per the executed lease with Veridian Information Solutions, please provide the Calculation
of all Landlord Costs and allowances, including the Improvement Allowance and commissions, relating
to the Terminated Space, assuming that the tenant exercises its termination right as of February 6,
2008. Please include the amortization rate and all documentation referenced in calculating the
unamortized Landlord Costs;

     22. Evidence of insurance delivered by the Tenants as required under the Leases;

     23. Current Tenant Financial Statements for General Dynamics;

M-1

 

     24. A list of all Service Agreements including service, maintenance, equipment and/or supply
contracts, and amendments thereto;

     25. Copies of any audits of reimbursable expenses reconciliations for 2003, 2004 and 2005;

     26. Month-by-month Account Receivables delinquency/aging report for June 2004 — May 2005; and

     27. Seller’s architect’s schedule and plans to support the rentable square footage and gross
building area calculations using the current BOMA method of measurement, to the extent the same is
in Seller’s possession.

M-2

 

EXHIBIT N

Tenant Notice

[Purchaser’s Letterhead]

_____________________, 2005

________________________

________________________

________________________

     Re: [Address] (the “Property”)

Dear _________________:

As of                                         , 2001,                                                             , ___(“Former Owner”),
has transferred all of its interest in and to the Property to                                                             
(“New Owner”). Consequently, New Owner is now the “landlord” or “lessor” under your
lease(s) with respect to the Property.

Future rental payments with respect to your leased premises in the Property should be made payable
to “                                                                        ” and should be mailed to P.O. Box                                         ,
                    ,                     -                    . If you prefer, we encourage you to wire transfer your payments
using the following instructions:

Please instruct your insurance carrier to provide to us a new Certificate of Insurance listing
"                                                                                                    , and its managing agent,
                                                            ” as additional insureds.

	 	 	 	 	 	 	 
	 	 	Sincerely yours,	 	 
	 
	 	 	 	 	 	 
	 	 	FORMER OWNER:	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Name:	 	 	 	 
	 

	 	 	 	 	 	 
	 

	 	Title:	 	 	 	 
	 

	 	 	 	 	 	 

	 	 	 	 	 
	 

	 	NEW OWNER:
	 	 
	 
	 	 	 	 
	 

	 	By:___________________________	 	 
	 

	 	Name:_________________________	 	 
	 

	 	Title:_________________________	 	 

N-1exv10w2

 

Exhibit
10.2

MEMBERSHIP UNITS

PURCHASE AGREEMENT

(Park Plaza II, L.L.C.)

     THIS MEMBERSHIP UNITS PURCHASE AGREEMENT (“Agreement”) is made as of August 9, 2005, by and
between PARK PLAZA PARTNERS, L.L.C., a Delaware limited liability company (“Seller”), and COLUMBIA
EQUITY TRUST, INC., a Maryland corporation (“Purchaser”).

RECITALS:

     A. Park Plaza II, L.L.C., a Delaware limited liability company (“Owner”), has an interest in
certain real property located in Montgomery County, Maryland, commonly known as “Park Plaza II” and
legally described in the attached Exhibit A (Land”).

     B. Seller is the sole member of, and owner of one hundred percent (100%) of the limited
liability company interest (“Membership Units”) in Owner.

     C. As of the date hereof, Owner owns the following (collectively, the “Subject Property”):

     (1) Ground Lease. The Lessee’s interest under that certain Ground Lease (Park Plaza
II) dated as of August 10, 2000 by and between The Trustees Under The Will and of the Estate
of James Campbell, Deceased, as Landlord (“Ground Lease Landlord”) and Owner, as Tenant, as
amended by that certain First Amendment to Ground Lease dated as of May 1, 2001 by and
between Ground Lease Landlord and Owner, and as described in that certain Memorandum of
Lease dated August 10, 2000, recorded February 2, 2001 in Liber 18755 at Folio 214, as
amended by that certain First Amendment to Memorandum of Lease dated May 1, 2001, recorded
May 2, 2001 in Liber 19098 at Folio 109, Clerk’s Office Montgomery County, Maryland (the
“Ground Lease”).

     (2) Improvements. (i) certain building structures, improvements and fixtures located
on the Land (the “Improvements”), and (ii) certain rights, privileges, servitudes, easements
and appurtenances thereunto belonging or appertaining (herein Owner’s interests under the
Ground Lease and in the Improvements and all rights, privileges, servitudes, easements and
appurtenances belonging or pertaining hereto will be referred to collectively as the “Real
Property”).

     (3) Personal Property and Intangibles. Certain equipment and personal property,
including without limitation, any maintenance equipment, tools, signs, supplies, appliances,
security systems, decorations, furniture, furnishings, machinery and landscaping, used by
Owner located at or installed on the Real Property and used solely in the operation of the
Real Property, if any, and the right to use the name of the Subject Property and other
business or trade names associated with the Subject Property (excluding any names containing
the name “Opus”) to the extent the same are assignable (collectively, “Personal Property”).

 

 

     (4) Leases. The interest as lessor in and to the leases described on Exhibit B
attached hereto and made a part hereof, together with all amendments or modifications
thereto, if any (each a “Lease”, collectively, the “Leases”) and any guaranties or other
security applicable thereto and all security deposits, advance rental or like payments, if
any, held by Seller in connection with the Leases.

     (5) Permits. The interest as owner of the Real Property in and to licenses, permits,
authorizations, certificates of occupancy and governmental approvals described on
Exhibit C attached hereto and made a part hereof, to the extent the same are
assignable and pertain to the Real Property (“Permits”).

     (6) Service Contracts. The interest as owner of the Real Property in and to the
existing service and maintenance contracts together with any amendments or modifications
thereto, if any, described on Exhibit D attached hereto and made a part hereof
(“Service Contracts”) to the extent they are assignable. On or before the Contingency Date
(as herein defined) Purchaser shall advise Seller, in writing, of any Service Contracts that
Purchaser does not desire to be assigned to and assumed by Purchaser at Closing (as herein
defined), and any such Service Contracts shall be terminated prior to Closing if such
contracts are terminable at no cost to Seller and, provided that Seller has reasonably
sufficient notice to allow for timely termination of such Service Contracts, provided,
however that the Common Area Property Management Agreement listed on Exhibit D shall
not be terminated. Failure by Purchaser to notify Seller prior to the Contingency Date
shall constitute an election by Purchaser to have all of the Service Contracts assigned to
and assumed by Purchaser.

     (7) Warranties. The interest in and to all unexpired warranties and guaranties given
or assigned to or benefiting Owner, the Real Property or the Personal Property regarding the
acquisition, construction, design, use, operation, management or maintenance of the Real
Property or Personal Property that are described on Exhibit E attached hereto and
made a part hereof (“Warranties”), to the extent the same are in Seller’s possession and
assignable without cost to Seller; provided, however, it is understood that the Subject
Property does not consist of Owner’s interest in any construction contract between Seller,
or Owner and any Opus related entity.

     (8) Plans. A limited license, as hereinafter described, to review and use a copy of
the final plans and specifications (excluding shop drawings) relating to the construction of
the Improvements in Seller’s possession (“Plans”); provided, however, neither Purchaser nor
its successors or assigns may use the Plans for any purpose other than the repair,
maintenance or restoration of the Improvements without the prior written consent of Seller,
and Purchaser hereby agrees to indemnify, defend and hold harmless Seller and its affiliates
from and against any unauthorized use of the Plans, which obligation shall survive Closing.
Seller reserves the right to use the Plans for any purpose.

     D. Seller has agreed to transfer and assign the Membership Units to Purchaser and Purchaser
has agreed to acquire the Membership Units from Seller (“Transfer”).

     E. This Agreement memorializes the agreement between Seller and Purchaser with respect to the
Transfer (including the terms and conditions of the Transfer) and describes certain obligations of
Seller and Purchaser that survive the termination of this Agreement or the closing of the Transfer
and Seller’s delivery of an assignment of the Membership Units to Purchaser.

2

 

     In consideration of this Agreement, Seller and Purchaser agree as follows:

     1. Transfer. Seller agrees to sell, assign, transfer and convey to Purchaser and Purchaser
hereby purchases from Seller all of Seller’s right, title and interest in and to the Membership
Units, upon and subject to the conditions and limitations herein contained.

     2. Purchase Price. Purchaser shall pay to Seller, as consideration for the purchase of the
Membership Units, the sum (“Purchase Price”) of THIRTY-FIVE MILLION AND NO/100 DOLLARS
($35,000,000.00) as the same may be adjusted as provided below. The Purchase Price shall be
payable as follows:

     (a) Balance of Purchase Price. The balance of the Purchase Price, plus or minus
prorations and other adjustments, if any, shall be due in cash at Closing, provided that the
Earnest Money (defined below) shall be applied to the cash balance. Purchaser shall pay
such balance to Seller, by wire transfer of immediately available funds to be received by
Seller at or before 2:00 p.m. Eastern Daylight Time on the Closing Date.

     (b) Initial Earnest Money Deposit. Within one (1) business day of the execution of
this Agreement by both Seller and Purchaser, Purchaser shall deposit the sum of TWO HUNDRED
THOUSAND and No/100 DOLLARS ($200,000.00) (the “Initial Earnest Money”) with the escrow
department of Chicago Title Insurance Company (“Title Company”) pursuant to an escrow
agreement in substantially the form of Exhibit F attached hereto and made a part
hereof (the “Escrow Agreement”).

     (c) Additional Earnest Money Deposit. If this Agreement has not been terminated as set
forth in Section 3 hereof on or before the Contingency Date, Purchaser shall deposit
the additional sum of THREE HUNDRED THOUSAND and NO/100 DOLLARS ($300,000.00) (the
“Additional Earnest Money”) with the escrow department of the Title Company within one (1)
business after the Contingency Date. Upon such deposit, the Title Company shall issue its
written acknowledgment of receipt as required under the Escrow Agreement. The Initial
Earnest Money, Additional Earnest Money and Extension Payment (as defined herein), if any,
and all interest earnings thereon are collectively referred to herein as the “Earnest
Money.” The Title Company will immediately deposit the Earnest Money in accordance with the
Escrow Agreement. The Earnest Money shall be paid to Seller at Closing as a credit against
the Purchase Price.

     3. Conditions Precedent to Closing. Purchaser’s obligation to consummate the transaction
contemplated by this Agreement shall be subject to satisfaction or waiver of each of the following
conditions (“Conditions Precedent”) on or before 5:00 p.m. Eastern Daylight Time, on the date which
is thirty (30) days after the date of this Agreement (“Contingency Date”):

     (a) Title/Survey. Within twenty (20) days of the date hereof, Seller will furnish to
Purchaser: (i) a current title commitment (“Commitment”) for the Real Property (with copies
of all underlying title documents listed in the Commitment other than any financing
documents) for an ALTA Extended Coverage Leasehold Policy of Title Insurance (Form B-1970)
(the “Title Insurance Policy”) in the amount of the Purchase Price issued by the Title
Company showing title in Owner and (ii) an updated ALTA as-built survey (“Survey”) for the
Real Property. If the Survey discloses survey defects or if the Commitment shows exceptions
unacceptable to Purchaser (collectively, the “Unpermitted Encumbrances”), then Purchaser
shall notify Seller, in writing, within five (5) days after receipt of the Commitment, the
underlying title documents and the Survey, specifying the Unpermitted Encumbrances, and,
prior to the Contingency Date,
Purchaser shall have received assurances satisfactory to Purchaser, in its reasonable
discretion, that the Unpermitted Encumbrances will be removed or endorsed over on or before
Closing. Notwithstanding anything herein to the contrary, Seller shall have no obligation
to correct, cure or remove any Unpermitted Encumbrances.

3

 

     (b) Due Diligence Materials; Access. Seller shall, within three (3) business days
following execution of this Agreement, deliver to Purchaser true and correct copies of all
Leases, Permits, Service Contracts, Warranties, Plans and without duplication of any of the
previous items and to the extent they are in possession of the Seller, Owner or the manager
of the Subject Property, the items listed on the attached Exhibit K (collectively,
the “Property Information”). Seller and Purchaser have or shall concurrently herewith,
enter into a Confidentiality and Access Agreement relating to Purchaser’s and Seller’s
rights and obligations relating to Purchaser’s review of Confidential Information (as
defined therein) and access to the Subject Property.

     (c) If Purchaser is not satisfied, in its sole and absolute discretion, with the
condition of the Subject Property or if Purchaser deems, in Purchaser’s sole and absolute
discretion, the Subject Property unsuitable for Purchaser’s purposes or for any other reason
whatsoever Purchaser elects not to proceed with the transaction contemplated by this
Agreement, then Purchaser may terminate this Contract by giving written notice to Seller on
or before the Contingency Date, in which case the Earnest Money will be returned to
Purchaser and the parties will have no further obligations under this Agreement (except for
the return of the Earnest Money and any obligations that specifically survive termination of
this Agreement). If Purchaser fails to give any notice on or prior to the Contingency Date,
then the Earnest Money shall become nonrefundable as of the Contingency Date and the Closing
shall occur ten (10) days following the Contingency Date or such other date mutually
agreeable to Purchaser and Seller (the “Closing Date”). Notwithstanding the foregoing,
Purchaser shall have the right to extend the initial Scheduled Closing Date thirty (30) days
by providing written notice to Seller on or prior to the initial Scheduled Closing Date and
depositing an additional sum of FIVE HUNDRED THOUSAND AND NO/100 DOLLARS ($500,000.00) (the
“Extension Payment”) with the escrow department of the Title Company as of the initial
Scheduled Closing Date and if, and as, extended, such thirtieth (30th) day shall
become the Closing Date. If Purchaser gives notice as provided above, then this Agreement
shall terminate, provided if Seller so requests, Purchaser shall execute any document
reasonably required by Seller to evidence such termination. Upon such termination, neither
party will have any further rights or obligations (other than the obligations of Purchaser
set forth in Recital C(8) and Sections 13, 29 and
30 and the indemnity and other obligations of Seller set forth in Sections
13 and 30 which obligations shall survive any termination; such indemnity
obligations shall be referred to herein as the “Surviving Indemnity Obligations”) regarding
this Agreement or the Subject Property.

     4. Covenants by Seller. Seller covenants and agrees with Purchaser that from the date hereof
until the Closing Date (as herein defined), Seller shall cause Owner to conduct its business
involving the Subject Property as follows, and during such period will (except as specifically
provided to the contrary herein):

     (a) Refrain from creating on the Subject Property any easements, encumbrances or liens
affecting the Subject Property other than as may be required by any applicable governmental
or quasi-governmental authority or by a provider of utility services, and refrain from
removing any Personal Property, fixture or equipment; provided, however, nothing herein
shall preclude Seller or the Property Manager from replacing any such items in the ordinary
course of operating the Subject Property. Seller shall, upon Seller’s receipt, deliver to
Purchaser a copy of any easement so required by any governmental or quasi-governmental
authority or provider of utility
services affecting the Subject Property which does not require the consent of
Purchaser, and any such easement shall constitute a Permitted Encumbrance.

4

 

     (b) Refrain from entering into or amending the Service Contracts, Warranties or Permits
(other than Leases which are governed by 4(d) below) regarding the Subject Property (other
than contracts in the ordinary course of business which are cancelable by Owner without
penalty within thirty (30) days after giving notice thereof) without the prior written
consent of Purchaser, which consent shall not be unreasonably withheld, delayed or
conditioned, and which shall be deemed given if Purchaser does not object to Seller’s
request for approval within five (5) business days.

     (c) Operate, maintain, repair and insure the Subject Property in a commercially
reasonable manner consistent with the existing operation, maintenance, repair and insurance
of the Subject Property and deliver the Subject Property as of the Closing substantially in
the condition it is in of the date hereof, ordinary wear and tear, and damage by fire or
other casualty excepted.

     (d) Except as expressly provided herein, from and after the date hereof (provided that
this Agreement has not been terminated), Seller shall refrain from amending the existing
Leases without Purchaser’s written approval, as provided below, provided that Purchaser
shall have no ability to interfere with the administration by Seller of the existing Leases
as required by the terms of such Leases. In addition, from and after the date hereof
(provided that this Agreement has not been terminated), except as expressly provided herein,
Seller shall not permit Owner to enter into any new leases with respect to the Real Property
(each a “Proposed New Lease”), without Purchaser’s written approval, as provided in this
Section 4(d). Seller shall furnish Purchaser with a true and correct copy of any Proposed
New Lease into which Owner desires to enter and such financial information with respect to
the proposed tenant as Seller has in its possession. Purchaser shall have three (3)
business days from receipt of such amendment or Proposed New Lease to approve or disapprove
the same, which approval shall not be unreasonably withheld, conditioned or delayed. In the
event that Purchaser does not approve any such amendment or Proposed New Lease, Purchaser
shall notify Seller, in writing, of such disapproval prior to expiration of the aforesaid
three (3)-business day period, stating in such written notification under what conditions,
if any, Purchaser’s approval would be forthcoming and Purchaser’s agreement to approve such
amendment or Proposed New Lease if such conditions are satisfied. All costs of tenant
improvements and leasing commissions with respect to any lease of the Real Property executed
between the date of the Agreement and the Closing Date shall be paid by Seller.

     (e) Promptly provide Purchaser with copies of all written notices delivered or received
under the Leases.

     (f) Promptly provide Purchaser a copy of any notice of litigation received by Seller
that may materially and adversely affect the ownership or operation of the Subject Property.

     5. Representations by Seller. As used in this Agreement, the phrase “to Seller’s knowledge”
or words of similar import shall mean the actual knowledge of Peg Bowden and Russ Golobich, without
independent investigation or inquiry. Subject to the foregoing, Seller represents to Purchaser as
follows:

5

 

     (a) Authority. Seller is a limited liability company duly organized and validly
existing and in good standing under the laws of the State of Delaware; Seller has the
requisite power and authority to enter into and perform this Agreement, the Closing
Documents (as herein defined) to which it is a party; such documents have been duly
authorized by all necessary action on the part of Seller and have been or will be duly
executed and delivered; such execution, delivery and performance by Seller of such documents
will not conflict with or result in a violation of Seller’s or Owner’s organizational
documents, or any judgment, order, or decree of any court or arbiter to which Seller or
Owner is a party; and such documents are valid and binding obligations of Seller, and are
enforceable against Seller in accordance with their terms, subject to applicable bankruptcy,
insolvency, reorganization, moratorium, creditor’s rights and other similar laws. Each
individual executing this Agreement on behalf of Seller is duly authorized to do so.

     (b) FIRPTA. Neither Seller nor Owner is a “foreign person,” “foreign partnership,”
“foreign trust” or “foreign estate” as those terms are defined in Section 1445 of the
Internal Revenue Code.

     (c) Proceedings. To the knowledge of Seller, there is no action, litigation,
investigation, condemnation or proceeding of any kind pending or, to the knowledge of
Seller, threatened against Seller or Owner which would have a material and adverse affect on
the ability of Seller to perform its obligations under this Agreement, or related to the
Subject Property or the Leases other than as disclosed to Purchaser in writing.

     (d) Leases and Ground Lease.

	 	(i)	 	Exhibit B is a true and complete list
of the Leases and all other occupancy agreements relating to the
Subject Property. Except as set forth in the Leases, there are no
rights of first refusal, options to terminate without cause of Owner,
options to renew, options to purchase, or any rent abatements given to
tenant under the Leases (the “Tenant”) after the Tenant is in occupancy
and paying rent.
	 
	 	(ii)	 	To the Seller’s knowledge, each Lease is in
full force and effect according to the terms set forth therein, and
there is no modification, amendment or alteration in writing or
otherwise, except as set forth in Exhibit B.
	 
	 	(iii)	 	To Seller’s knowledge there are not, and
neither Seller nor Owner has received written notice from any Tenant of
any unperformed obligation of the Owner, as landlord under any of the
Leases, including, without limitation, failure of the landlord to
construct any required tenant improvements. To Seller’s knowledge
neither Seller nor Owner has been advised in writing of any claims or
disputes giving rise to any setoff by Tenant. To Seller’s knowledge,
with respect to the Leases, all tenant improvement allowances have been
paid and all tenant improvements have been completed.
	 
	 	(iv)	 	To Seller’s knowledge, neither Owner nor Tenant
is in default under the Leases (beyond any applicable grace or cure
period), and there are no rent delinquencies of more than thirty (30)
days.

6

 

	 	(v)	 	There are no brokers’ commissions, finders’
fees, or other charges payable or to become payable to any third party
on behalf of Seller or Owner as a result of or in connection with the
Leases, including, without limitation, any unexecuted options to expand
or renew, except as set forth on Exhibit B-1 attached hereto
and made a part hereof.
	 
	 	(vi)	 	To Seller’s knowledge, the Ground Lease is in
full force and effect according to the terms set forth therein, there
is no modification, amendment or alteration in writing or otherwise,
except as set forth in Exhibit B, and neither Seller nor the
landlord is in default under the Ground Lease (beyond any applicable
grace or cure period).

     (e) Blocked Persons. Seller has not received written notice that either Seller or
Owner is:

	 	(i)	 	listed on the Specially Designated Nationals
and Blocked Persons List maintained by the Office of Foreign Assets
Control, Department of the Treasury (“OFAC”) pursuant to Executive
Order No. 13224, 66 Fed. Reg. 49079 Sept. 25, 2001 (the “ Order”)
and/or on any other list of terrorists or terrorist organizations
maintained pursuant to any of the rules and regulations of OFAC or
pursuant to any other applicable Orders (such lists are collectively
referred to as the “Lists”);
	 
	 	(ii)	 	a person who has been determined by competent
authority to be subject to the prohibitions contained in the Order;
	 
	 	(iii)	 	owned or controlled by, and does not act for
or on behalf of, any person or entity on the Lists or any other person
or entity who has been determined by competent authority to be subject
to the prohibitions contained in the Order.

     (f) Bankruptcy. Neither Seller nor Owner is the subject of, and neither has received
any written notice of or threat that either of them has or will become the subject of, any
reorganization, liquidation, dissolution, receivership or other action or proceeding under
the United States Bankruptcy Code, 11 U.S.C. §§ 101, et seq., or any other federal, state or
local laws affecting the rights of debtors and/or creditors generally, whether voluntary or
involuntary and including, without limitation, proceedings to set aside or avoid any
transfer of any interest in property or obligations, whether denominated as a fraudulent
conveyance, preferential transfer or otherwise, or to recover the value thereof or to
charge, encumber of impose a lien thereon.

     (g) Service Contracts. Exhibit D attached hereto is a complete list of all
current Service Contracts which list includes the names of the contracting parties, the
dates of the Service Contracts and a listing of all amendments to such Service Contracts.

     (h) Condemnation. Seller has no knowledge of nor has it received any written notice of
any pending or contemplated condemnation proceedings affecting all or any part of the
Subject Property.

     (i) Accuracy of Documents. All documents and records to be delivered comprising the
Property Information are true, correct and complete copies of the documents and records
purported to be delivered thereunder.

7

 

     (j) Title to Membership Units. Seller is the record and beneficial owner of all of the
Membership Units. The Membership Units constitute 100% of all of the outstanding Membership
Units of Owner free and clear of all right, claim and interest of others.

     (k) Status of Owner. That certain Certificate of Formation of Owner filed January 24,
2001, with the Office of the Secretary of State of Delaware, and that certain Limited
Liability Company Agreement of Owner dated as of April 12, 2000, delivered to Purchaser, are
true and correct and have not been modified or amended, except as set forth in the Owner
Disclosure Schedule attached as Exhibit H (“Owner Disclosure Schedule”). Except for
said Certificate of Formation of Owner and said Limited Liability Company Agreement of
Owner, there are no other agreements of any type or kind with respect to voting or control
of Owner or with respect to issuance of additional membership interests in Owner.

     (l) Subsidiaries. Owner has no subsidiaries, and Owner has no investments or other
interests in (including advances to) any other business, person or venture.

     (m) Financial Statements. Seller has furnished Purchaser with copies of the balance
sheet of Owner as of June 30, 2005, and the related statement of earnings for the period
ending on such date (hereinafter collectively referred to as the “Financial Statements”).
The Financial Statements (a) are in accordance with the books and records of Owner, (b)
present fairly (i) the assets, liabilities and financial condition of Owner as of such date,
and (ii) the results of operations for the period covered thereby, and (c) have been
prepared on a tax basis consistent with that of preceding years. Since the date of the
Financial Statements, there has not been any material adverse change in the financial
condition, business, properties or results of operations of Owner.

     (n) Actions by Owner Since the Date of the Financial Statements. Except as set forth
in the Owner Disclosure Schedule, since the date of the Financial Statements, Owner has not:

	 	(i)	 	incurred or agreed to incur any obligations or
liabilities, except obligations or liabilities in the ordinary course
of business, or under contracts, leases, documents and transactions
listed in the attached Exhibits and Schedules, or in the Title
Commitment or incurred or agreed to incur any debt;
	 
	 	(ii)	 	satisfied or discharged any lien, or paid any
obligation or liabilities other than (A) liabilities included in the
Financial Statements, (B) liabilities incurred in the ordinary course
of business, and (C) obligations and liabilities under contracts,
leases, transactions or documents listed in the attached Exhibits and
Schedules or in the Title Commitment;
	 
	 	(iii)	 	mortgaged, pledged or subjected to lien or
other encumbrance any of its property;
	 
	 	(iv)	 	sold or transferred any of its assets or
canceled any debts owing to it or claims owed by it;
	 
	 	(v)	 	waived any rights of material value;

8

 

	 	(vi)	 	experienced any material change in the
financial condition, or in the operations or business of Owner, other
than changes in the ordinary course of business; or
	 
	 	(vii)	 	suffered any damage or destruction, whether or
not covered by insurance, materially and adversely affecting the
properties or business of Owner.

     (o) Liabilities. Except as set forth on the Owner Disclosure Schedule, Owner has no
debts, liabilities, or obligations of, or claims of any kind or character, whether accrued,
absolute or contingent (“Liabilities”) other than (i) Liabilities reflected on the Financial
Statements and (ii) Liabilities expressly contemplated by Section 5(n).

     (p) Compliance with Legal Requirements. To the knowledge of Seller, except as set
forth on the Owner Disclosure Schedule, Owner is in material compliance with all applicable
laws, ordinances, rules, regulations, orders and requirements of all governmental
authorities relating to, or regulating, the activities of Owner.

     (q) Title to Property. To Seller’s Knowledge, Owner has good and marketable title to
all of the Subject Property free and clear of any security interests, claims, liens
(including tax liens for taxes that are past due and delinquent), or encumbrances
whatsoever, except as set forth as exceptions in the Commitment. As of the date hereof,
there are no unpaid bills incurred by the Seller or the Owner for work performed upon or
materials delivered to the Real Property by or on behalf of the Seller or the Owner for the
construction or improvement of the Real Property, except for those incurred and to be paid
by Seller or Owner in the ordinary course of business. Owner does not own or have any
interest in any real estate, except the Real Property.

     (r) Certain Property Obligations. As of the date hereof: (a) all payments, levies,
dues, charges, assessments and other amounts (except for real estate taxes, special
assessments and front foot benefit or private utility charges not yet due and payable) which
are payable on or before the date hereof under the documents and instruments referred to in
the Commitment, and any other unrecorded documents, agreements, and instruments affecting
the Subject Property (“Title Documents”) which, to Seller’s knowledge, exist, are paid in
full (except for financings of record and insurance premiums), and (b) to Seller’s
Knowledge, there are no existing defaults or violations affecting the Subject Property or
the obligations of the Owner under the Title Documents.

     (s) All Contracts. Seller has furnished to Purchaser copies of all contracts and
agreements to which Owner is a party relating to the Subject Property that are currently in
effect (except for financing documents and insurance policies); and all such contracts and
agreements, except the Leases and the Service Contracts, are identified in the Commitment.

     (t) Litigation. The Owner Disclosure Schedule describes each action, suit, litigation,
judicial proceeding or governmental investigation (collectively, the “Actions”) to which
Owner has been a party at any time. There are no Actions pending, or to Seller’s Knowledge,
threatened, against or relating to the business of Owner or involving any of its property
which, if adversely determined, could reasonably (in Seller’s opinion) be expected to have a
material adverse effect on Owner. Except as described in the Owner Disclosure Schedule,
Owner does not currently have pending, and is not considering, any litigation or the pursuit
of any rights or remedies that may be available against any third parties relating to the
business of the Owner or involving any of its property.

9

 

     (u) Tax Matters. Except as set forth on the Owner Disclosure Schedule:

	 	(i)	 	Owner has always been treated as an entity that
is disregarded for federal income tax purposes.
	 
	 	(ii)	 	Owner and Seller have filed all Tax Returns
required to be filed by either of them involving Owner prior to the
date hereof. To Owner’s and Seller’s respective knowledge, all such
filed Tax Returns were correct and complete in all material respects
and all Taxes owed by or on behalf of Owner (whether or not shown on
any Tax Return) have been paid. To Owners’ and Seller’s respective
knowledge, Owner has complied in all material respects with all
applicable laws, rules and regulations relating to the payment and
withholding of Taxes and Owner or Seller, as appropriate, has withheld
and paid over to the proper governmental entities, within the time
period prescribed by law, all material amounts required to be so
withheld and paid over under applicable laws and regulations. Seller
(Owner’s sole member) is not the beneficiary of any extension of time
within which to file a Tax Return involving Owner. Since the date of
such Financial Statements, Owner has not incurred any material
liability for Taxes other than in the ordinary course of business. No
event has occurred, and no condition or circumstance exists, which
presents a material risk that any material Tax described in the
preceding sentences will be imposed upon Owner;
	 
	 	(iii)	 	Owner is not the subject of any audit,
examination, or other proceeding in respect of Taxes, and to the
knowledge of Seller, no audit, examination or other proceeding in
respect of Taxes involving Owner is being considered by any Tax
authority. No deficiencies for any Taxes have been proposed, asserted
or assessed against Owner. Neither Owner nor Seller has given any
currently effective waiver of any statute of limitations in respect of
Taxes involving Owner or agreed to any currently effective extension of
time with respect to a Tax assessment or deficiency involving Owner.
There are no liens (other than for Taxes not yet due and payable) on
any of the assets of Owner that arose in connection with any failure
(or alleged failure) to pay any Tax;
	 
	 	(iv)	 	To the knowledge of Seller, there are no facts
or circumstances that could give rise to a reasonable expectation that
any governmental authority will assess any additional Taxes for any
period for which Owner or Seller has filed or should have filed Tax
Returns involving Owner. There is no dispute or claim concerning any
Tax liability involving Owner either (A) claimed or raised by any
governmental authority in writing or (B) to the knowledge of Seller,
based upon personal contact with any agent of such authority, which
remains unsettled as of the date hereof;
	 
	 	(v)	 	Owner is not liable for any Taxes attributable
to any other Person, whether by reason of being a member of an
affiliated group, being a party to a tax sharing agreement, as a
transferee or successor, or otherwise;

10

 

	 	(vi)	 	No powers of attorney or other authorizations
are in effect that grant to any Person the authority to represent Owner
or Seller in connection with any Tax matter or proceeding involving
Owner;
	 
	 	(vii)	 	Owner has delivered to Purchaser correct and
complete copies of any Tax Returns and reports Owner filed for all
periods not barred by the applicable statute of limitations. With
respect to periods not barred by the applicable statute of limitations,
the Owner Disclosure Schedule (i) describes all material Tax
elections, consents and agreements made by or affecting Owner or any
Person to whose liabilities Owner has succeeded that will be in effect
after the Closing Date, (ii) lists all material types of Taxes paid and
Tax Returns filed by or on behalf of Owner or any such Person, (iii)
expressly indicates each Tax with respect to which Owner or any such
Person is or has been included in a consolidated, unitary or combined
Tax Return, and (iv) describes the status of all examinations,
administrative or judicial proceedings, and litigation with respect to
any Taxes of Owner or for which it may be liable;
	 
	 	(viii)	 	Owner has delivered to Purchaser any depreciation, amortization, or
tax basis information necessary for the preparation of Purchaser’s tax
returns.

     (v) Prior Activities of Owner. Owner has not, directly or indirectly, engaged in any
business or activity other than owning the Property and those businesses and activities
incidental thereto.

     (w) Binding Effect: Approvals and Consents. Seller’s execution and delivery of this
Agreement and performance of the transactions contemplated hereby will not result in a
breach or violation by Owner or Seller of, or constitute a default by Owner or Seller under,
any agreement or instrument to which Owner or Seller is a party or by which any of its
properties are bound, or the Certificate of Formation of Owner, or any statute, judgment,
order, injunction, decree, regulation or ruling of any court or other governmental
authority.

     (x) Insurance. Owner currently maintains insurance of the types, in the amounts and
insuring against the risks as set forth in the Owner Disclosure Schedule. Seller and
Purchaser acknowledge and agree that all policies of insurance currently held by Owner will
be cancelled or Owner will be removed as an insured or beneficiary thereunder at Closing as
provided in Section 9(k) hereof.

     (y) Employee Benefit Plans and Pension Matters. Owner has no pension, profit sharing,
retirement, life insurance, medical, disability, dental or health plans, death benefit
plans, deferred compensation plans, stock option, bonus or other incentive plans, vacation
benefit plans, severance plans, or other employee benefit plans of any type whatsoever,
including, without limitation, any pension plan or welfare plan as defined in Section 3(2)
and Section 3(1), respectively, of the Employee Retirement Income Security Act of 1974.

     (z) Employees. Owner has no employees.

11

 

For purposes of this Section 5, the following capitalized terms shall have the
following meanings:

     “Tax” or “Taxes” shall mean any federal, state, local or
foreign income, gross receipts, license, payroll, employment, excise, severance,
stamp, occupation, premium, windfall profits, environmental (including taxes under
Code Section 59A), customs duties, capital stock, franchise, profits, withholding,
social security (or similar), unemployment, disability, real property, real estate
taxes, personal property, sales, use, transfer, registration, value added,
alternative or add-on minimum, estimated or other tax of any kind whatsoever
involving Owner, including any interest, penalty or addition thereto, whether
disputed or not.

     “Tax Return” means any return, declaration, report, claim for refund,
or information return or statement relating to Taxes, including any schedule or
attachment thereto, and including any amendment thereof.

6. Representations by Purchaser and Other Matters.

     (a) Representations by Purchaser. Purchaser represents to Seller as follows:

	 	(i)	 	that Purchaser is a corporation duly organized
and validly existing and in good standing under the laws of the
District of Columbia, that Purchaser has the requisite power and
authority to enter into this Agreement, and the Closing Documents (as
herein defined) that it is party to; such documents have been duly
authorized by all necessary action on the part of Purchaser and have
been or will be duly executed and delivered; that the execution,
delivery and performance by Purchaser of such documents will not
conflict with or result in violation of Purchaser’s organizational
documents or any judgment, order or decree of any court or arbiter to
which Purchaser is a party; such documents are valid and binding
obligations of Purchaser, and are enforceable against Purchaser in
accordance with their terms, subject to applicable bankruptcy,
insolvency, reorganization, moratorium, creditor’s rights and other
similar laws.
	 
	 	(ii)	 	Purchaser has not received written notice that
Purchaser is:

	 	(A)	 	listed on the Specially Designated Nationals and
Blocked Persons List maintained by OFAC pursuant to the Order
and/or on any Lists;
	 
	 	(B)	 	a person who has been determined by competent authority
to be subject to the prohibitions contained in the Order;
	 
	 	(C)	 	owned or controlled by, and does not act for or on
behalf of, any person or entity on the Lists or any other person
or entity who has been determined by competent authority to be
subject to the prohibitions contained in the Order.

	 	(iii)	 	Purchaser shall not transfer or permit the
transfer of any interest in Purchaser to any person or entity who is
listed on the Lists.

12

 

	 	(iv)	 	Purchaser is able to bear the economic risk of
the investment in the Membership Units;
	 
	 	(v)	 	Purchaser has knowledge and experience in
financial and business matters, that it is capable of evaluating the
merits and risks of the prospective investment in the Membership Units
and that it is able to bear such risks.
	 
	 	(vi)	 	Purchaser understands an investment in the
Membership Units is highly speculative but believes that the investment
is suitable for Purchaser based upon its investment objectives and
financial needs, and has adequate means for providing for its current
financial needs and personal contingencies and has no need for
liquidity of investment with respect to the Membership Units;
	 
	 	(vii)	 	Purchaser is acquiring the Membership Units
for its own account only and not with a view to, or with any intention
of, a distribution or resale thereof, in whole or in part, in violation
of the Securities Act of 1933, as amended (the “Act”), or any rule or
regulation thereunder.
	 
	 	(viii)	 	Purchaser acknowledges and understands that the Membership Units have
not been registered under the Act or under any state securities laws
and will be subject to transfer restrictions under the Act and
applicable state securities law. The Membership Units constitute
“restricted securities,” as such term is defined in Rule 144 of the
Act, and accordingly, the Membership Units must be held indefinitely,
until subsequently registered under the Act, an exception from
registration is available or the Membership Units are resold in
conformance with Rule 144. Purchaser agrees that one or more
restrictive legends may be placed on the certificate(s), if any,
representing the Membership Units that reflect such resale limitations.
	 
	 	(ix)	 	Purchaser is an “accredited investor” as
defined in Rule 501(a) of Regulation D promulgated under the Act.

     (b) Other Matters. The representations of Seller and Purchaser contained in this
Agreement shall survive Closing; provided, however, (i) any cause of action of Purchaser
against Seller by reason of a breach or default of any of the representations in Section
5 set forth herein or in any certificates executed by Seller pursuant to Section
8(a) below or in any Closing Documents or Purchaser’s and Seller’s Closing Documents
that Seller is a party to shall automatically expire as of the date which is twelve (12)
months after the Closing (the “Warranty Expiration Date”), except that the same shall not
expire as to any such breach or default as to which Purchaser has given written notice to
Seller of a claim for any such breach or default prior to the Warranty Expiration Date, (ii)
Seller’s total liability for any breach or breaches of its representations in
Sections 5(a)-(i), (q)-(t), (v) and (w) set
forth herein shall in no event exceed $1,100,000.00 in the aggregate, which liability limit
shall survive Closing, and (iii) Seller shall not have any liability whatsoever to Purchaser
with respect to any breach or breaches by Seller of any of its representations in
Section 5 set forth herein, if, prior to Closing, Purchaser obtains knowledge by
virtue of a written document or report received on or prior to the Closing Date of a fact or
circumstance, the existence of which would constitute a breach of Seller’s representations
in Section 5 set forth herein.

13

 

Among other things, for purposes hereof, Purchaser
shall be deemed
to have knowledge of any fact or circumstance set forth in any environmental
assessments, engineering reports, Estoppel Certificate (as defined in Section
7(b)(v) hereof) or other written materials reviewed or received by Purchaser on or prior
to the Closing Date. Seller’s representations in Section 5 set forth herein shall
be deemed automatically modified to the extent that any information contained in any
environmental assessments or engineering reports or other written materials reviewed or
received by Purchaser prior to the Closing Date is inconsistent with the matters which are
the subject of such representations in Section 5. Notwithstanding the foregoing,
Seller shall not have any liability with respect to any breach to the extent the loss
sustained by Purchaser as a result thereof does not exceed $25,000.00 in the aggregate,
provided, further if any such loss exceeds $25,000.00, Seller shall be liable for the total
amount of such loss subject to the maximum liability provisions herein contained.

7. Closing.

     (a) Closing Date. The closing of the purchase and sale contemplated by this Agreement
(the “Closing”) shall occur on or prior to the Closing Date, subject to delays occasioned by
operation of Section 8(b), at the office of the Title Company or at such other time
and place as the parties may mutually agree.

     (b) Purchaser’s Closing Conditions Precedent. Purchaser’s obligation to consummate the
transaction contemplated by this Agreement shall be subject to satisfaction or waiver of
each of the following conditions (“Purchaser’s Closing Conditions Precedent”); provided,
however that Purchaser shall have the unilateral right to waive any Purchaser’s Closing
Conditions Precedent, in whole or in part, by written notice to Seller:

	 	(i)	 	The representations in Section 5 of
Seller hereof shall be, in all material respects, true and complete as
of the Closing.
	 
	 	(ii)	 	Seller shall have performed all of the
obligations required to be performed by Seller under this Agreement, as
and when required by this Agreement, in all material respects.
	 
	 	(iii)	 	There shall not have been instituted and be
pending any action or proceeding before any court, governmental agency
or other regulatory or administrative agency or commission challenging
the purchase and sale of the Membership Units or the transactions
related thereto that seeks to restrain, prevent or change the
transactions contemplated hereby or questions the validity of such
transactions.
	 
	 	(iv)	 	Neither the Purchaser nor the Seller shall have
terminated this Agreement as provided herein.
	 
	 	(v)	 	Purchaser shall have received an estoppel
certificate at least five (5) days prior to the Closing Date,
substantially in the form attached to the Leases or, if no such form is
attached, in the form of Exhibit I attached hereto and made a
part hereof, with such additional information or modifications
reasonably approved by Purchaser, from (i) Tenants under Leases (the
“Estoppel Certificates”), provided Seller may substitute a certificate
or certificates of Seller as provided below and (ii) an estoppel
certificate in the form of Exhibit I-1 attached hereto and made
a part hereof, with such additional information or modifications
reasonably
approved by Purchaser, from Ground Lease Landlord (the “Ground Lease
Estoppel”).

14

 

	 	 	 	Seller and Purchaser agree that Seller shall not be in
default under this Agreement if Seller is unable to obtain an
Estoppel Certificate from one or more of the Tenants or the Ground
Lease landlord and that no costs, expenses or other damages shall be
due to Purchaser in such event provided, however, that if Seller is
unable to deliver Exhibit B to the Ground Lease Estoppel in
substantially the form attached to Exhibit I-1 and the condition is
not waived by Purchaser and Seller, Seller shall reimburse Purchaser
for Purchaser’s reasonable out of pocket costs up to a maximum amount
of $50,000.00. Seller shall, and shall cause Owner to, use
reasonable efforts to obtain such Estoppel Certificates from each
Tenant and the Ground Lease landlord; provided, however, neither
Seller nor Owner shall be required to expend significant monies or
make significant concessions or institute litigation in order to
obtain such Estoppel Certificates. If Seller has received Estoppel
Certificates from Tenants under Leases constituting at least ninety
percent (90%) of the rentable square feet of the Subject Property,
Seller shall deliver a certificate or certificates of Seller related
to the remaining ten percent (10%) of Leases containing information
which was intended to be included in each such Estoppel
Certificate(s) (modified to reflect Seller’s knowledge as to such
matters which would be known to a certainty only by the Tenant),
which Seller’s certificate(s) shall be accepted by Purchaser in lieu
of such Tenant Estoppel Certificate(s). Seller may substitute for a
certificate delivered by Seller a Tenant Estoppel Certificate later
received from a Tenant for which such Seller’s certificate was given,
and Seller shall be relieved from all liability on the Seller’s
Certificate for which the Tenant’s Estoppel Certificate was
substituted.

     (c) Seller’s Conditions Precedent. Seller’s obligation to consummate the transaction
contemplated by this Agreement shall be subject to satisfaction or waiver of each of the
following conditions (“Seller’s Closing Conditions Precedent”), but Seller shall have the
unilateral right to waive, in whole or in part, any Seller’s Closing Conditions Precedent by
written notice to Purchaser:

	 	(i)	 	The representations in Section 6 of
Purchaser hereof shall be, in all material respects, true and complete.
	 
	 	(ii)	 	Purchaser shall have performed all of the
obligations required to be performed by Purchaser under this Agreement,
as and when required by this Agreement, in all material respects.
	 
	 	(iii)	 	Seller shall have received at least five (5)
days prior to the Closing Date, an estoppel certificate in the form of
Exhibit I-1 attached hereto and made a part hereof, with such
additional information or modifications reasonably approved by Seller,
from Ground Lease Landlord.
	 
	 	(iv)	 	Opus East shall have been released from the
terms of that certain Guaranty of Lease dated as of August 10, 2000 by
Opus East in favor of the Ground Lease Landlord as amended by that
certain First Amendment to Guaranty dated as of May 1, 2001 by Opus
East in favor of the
Ground Lease Landlord and Opus East shall have no further obligation
thereunder.

15

 

In the event Purchaser’s Closing Conditions Precedent or Seller’s Closing Conditions Precedent, as
the case may be, have not been satisfied or waived as of the scheduled Closing Date as the same may
be extended as permitted above, and provided the failure to satisfy or waive any such condition is
not attributable to a breach or default of this Agreement by Seller or Purchaser, as the case may
be (in which event the provisions of Section 10 shall apply), this Agreement shall
terminate (other than the Surviving Indemnity Obligations, which obligations shall survive any such
termination) and the Earnest Money shall promptly be returned to Purchaser; provided, however, upon
such termination Purchaser shall, at the request of Seller, execute any document reasonably
requested by Seller to evidence such termination. Upon such termination, neither party will have
any further rights or obligations (other than the Surviving Indemnity Obligations which shall
survive any such termination) regarding this Agreement or the Subject Property.

8. Closing Deliveries.

     (a) Seller’s Closing Documents. On the Closing Date Seller shall execute and/or
deliver to Purchaser or cause to be executed and/or delivered the following (collectively,
“Seller’s Closing Documents”):

	 	(i)	 	Termination of Management Agreement. Evidence
that any management agreement for the Subject Property has been
terminated.
	 
	 	(ii)	 	Certificate Regarding Representations in
Section 5. A certificate stating that the representations in
Section 5 made by Seller under this Agreement are true and
complete in all material respects as of the Closing Date, or indicating
any material and adverse change in any such representations.
	 
	 	(iii)	 	FIRPTA Affidavit. A non-foreign affidavit
properly containing such information as is required by Section
1445(b)(2) of the Internal Revenue Code and its regulations promulgated
thereunder.
	 
	 	(iv)	 	Miscellaneous. Other documents reasonably
required to consummate the transaction this Agreement contemplates.

     (b) Title Insurance Policy. At Closing, Seller shall cause the Title Company, to
deliver to Purchaser the Title Insurance Policy, marked-up title commitments or proforma
owner’s policies in accordance with the Commitment. If the Title Insurance Policy which the
Title Company is prepared to issue shows any Unpermitted Encumbrances, Seller covenants and
agrees, within thirty (30) days after the scheduled Closing Date (such 30-day period being
sometimes hereinafter referred to as the “Cure Period”), to use reasonable efforts to remove
such Unpermitted Encumbrances or to cause the Title Company to issue its endorsement over
any such Unpermitted Encumbrances, which endorsement shall be in form and substance
acceptable to Purchaser in its sole discretion and the Closing shall be delayed in
accordance with this Section 8(b) while Seller undertakes such efforts. If, after
using reasonable efforts, as aforesaid, Seller cannot cause such Unpermitted Encumbrances to
be removed or if Seller cannot cause the Title Company to issue its endorsement over any
such Unpermitted Encumbrances on or before the expiration of the Cure Period, Purchaser
shall, within five (5) business days following expiration of the Cure Period, elect to
either (i) terminate this Agreement (other than Surviving Indemnity
Obligations,

16

 

which obligations shall survive any such termination) and the Earnest
Money shall be returned to Purchaser, provided if Seller so requests, Purchaser shall
execute any document reasonably requested by Seller to evidence such termination, and
neither party will have any further obligations (other than the Surviving Indemnity
Obligations, which obligations shall survive any such termination) or (ii) accept the
transfer of the Membership Units (without any reduction in the Purchase Price), provided
that Seller shall remove any mortgage or similar financing lien against Owner. Failure of
Purchaser to notify Seller within the time limits prescribed herein shall constitute an
election under clause (ii) above.

     (c) Purchaser’s Closing Documents. On the Closing Date, Purchaser will execute and/or
deliver or cause to be executed and/or delivered to Seller the following (collectively,
“Purchaser’s Closing Documents”):

	 	(i)	 	Purchase Price. The Purchase Price, plus or
minus prorations or other adjustments, if any, by wire transfer of
immediately available funds, to be received in Title Company’s trust
account on or before 12:00 p.m.  — Eastern Daylight Time on the Closing
Date.
	 
	 	(ii)	 	Certificate Regarding Representations in
Section 6. A certificate executed by Purchaser certifying that
representations in Section 6 made by Purchaser under this
Agreement are true and complete in all material respects as of the
Closing Date.
	 
	 	(iii)	 	Miscellaneous. Other documents reasonably
required to consummate the transaction this Agreement contemplates.

     (d) Purchaser’s and Seller’s Closing Documents. On the Closing Date, Seller and
Purchaser shall jointly execute and deliver or cause to be executed and delivered the
following (together with the Purchaser’s Closing Documents and the Seller’s Closing
Documents, the “Closing Documents”:

	 	(i)	 	Closing Statement. A Closing Statement in form
and substance reasonably acceptable to both Seller and Purchaser and
consistent with the terms of this Agreement, showing the Purchase Price
and all prorations, adjustments, credits and debits this Agreement
describes.
	 
	 	(ii)	 	Assignment and Assumption of Membership
Interests. An Assignment and Assumption of Membership Interests
pursuant to which Seller assigns to Purchaser and Purchaser assumes all
of the Membership Units of Owner.
	 
	 	(iii)	 	Notices to Tenants. Written notices to the
Tenants directing them to make future lease payments and to send all
notices or other communications to Purchaser at the place designated by
Purchaser in the form of Exhibit L attached hereto.
	 
	 	(iv)	 	Tax Declarations and Affidavits. Transfer tax
declarations or affidavits to the extent required by law with respect
to the Subject Property.
	 
	 	(v)	 	Notice of Taxing Authority. Notice to taxing
authority advising of change of address for the Statements.

17

 

	 	(vi)	 	Resignation and Appointment of New Directors
and Officers. A resignation of Owner’s current directors and officers
and appointment of new directors and officers of Owner by Purchaser.
	 
	 	(vii)	 	Miscellaneous. Such other documents,
instruments and affidavits as shall be reasonably necessary to
consummate the transaction contemplated hereby.

     (e) Post-Closing Deliveries. Within a reasonable time following the Closing, Seller
shall deliver, or cause to be delivered, the following items to Purchaser:

	 	(i)	 	Original Documents. Original copies of the
Leases, the Permits, the Warranties, the Service Contracts to the
extent not previously delivered to Purchaser, (to the extent assumed by
Purchaser) and the Plans to the extent in Seller’s possession.
	 
	 	(ii)	 	Keys and Manuals. Seller shall deliver to
Purchaser all of the keys in Seller’s possession to any door or lock at
the Subject Property, in the possession or control of the Seller.
	 
	 	(iii)	 	Tenant Files. The current tenant files,
including notices, financial information, and other information to the
extent such items are in the possession of Seller and subject to any
confidentiality restrictions imposed upon Seller by the applicable
tenant.

     9. Adjustment and Prorations. For purposes of calculating prorations, Purchaser shall be
deemed to be in title to the Subject Property, and therefore entitled to the income therefrom and
responsible for the expenses thereof, for the entire day upon which the Closing occurs. All such
prorations shall be made on the basis of the actual number of days of the year and month that shall
have elapsed as of the Closing Date. The amount of such prorations shall be adjusted in cash after
Closing, as and when complete and accurate information becomes available. Seller and Purchaser
agree to cooperate and use their good faith and diligent efforts to make such adjustments within a
reasonable time after the calendar year end following Closing. Except as specifically provided
otherwise herein, items of income and expense for the period prior to the Closing Date will be for
the account of Seller and items of income and expense for the period on and after the Closing Date
will be for the account of Purchaser, all as determined by the accrual method of accounting. Bills
received after Closing that relate to expenses incurred, services performed or other amounts
allocable to the period prior to the Closing Date shall be paid by Purchaser if such bills are for
Operating Expense Pass-Throughs (as hereinafter defined). The obligations of the parties pursuant
to this Section 9 shall survive the Closing and shall not merge into any documents of
conveyance delivered at Closing.

     (a) Real Estate Taxes and Special Assessments. Real estate taxes and assessments
imposed by governmental authority (and any assessments imposed by private covenant) due and
payable in the year of Closing shall be prorated as of the Closing Date based upon the most
recent tax bills or assessment. Seller shall receive a credit for any taxes and assessments
paid by Seller and applicable to any period after the Closing. Special assessments shall be
prorated according to the due dates of installments, with Seller being responsible for
installments that become due and payable before the Closing Date, and Purchaser being
responsible for installments that become due and payable on or after the Closing Date. If,
for the fiscal tax year in which the Closing is held, or any prior year, there are any tax
protests filed, or abatement application proceedings pending at any time prior to the
Closing with reference to the Property, Seller shall have the right
to settle such protests or proceedings as long as such settlement does not include any
agreement as to the valuation of the Property for real estate tax purposes for the period
after the Closing.

18

 

Otherwise, Seller shall not settle the same without Purchaser’s prior
written consent. All amounts recovered as a result thereof, whether by settlement or
otherwise, shall, net of attorneys’ fees and other expenses, be apportioned as of the
Closing for the fiscal tax year in which the Closing is held, and paid, when received, to
the parties entitled thereto; provided, however, that to the extent any such amounts are
payable to Tenant pursuant to the terms of the Leases, such amounts shall be promptly paid
over to such Tenant. The parties agree to execute any papers or take such steps, either
before or after any Closing, as may be necessary to carry out the intention of the
foregoing.

     (b) Title Insurance. Purchaser shall pay all title examination fees of Title Company,
the premium for the cost of the Title Insurance Policy with endorsements and all costs of
any lender’s title insurance policy, if applicable.

     (c) Survey Costs. Purchaser shall pay all costs of the Survey.

     (d) Closing Fee. Seller and Purchaser will each pay one-half of any reasonable and
customary closing fee charged by the Title Company.

     (e) Transfer Tax. Any transfer taxes including, without limitation, state and county
transfer or recordation taxes, if any, shall be split equally between Seller and Purchaser.
Purchaser shall pay for any mortgage registration or recording taxes in connection with any
loan documentation or mortgages recorded by Purchaser and/or Purchaser’s lender, if any.

     (f) Collected Rents. All collected net rent (excluding Operating Expense
Pass-Throughs) and other collected income under the Leases shall be prorated as of the
Closing. Seller shall be charged with any rent and other income collected by Seller before
Closing but applicable to any period of time after Closing. Uncollected rent and other
income shall not be prorated. Purchaser shall apply rent and other income from Tenant that
are collected by Purchaser after the Closing unless the Tenant properly identifies the
payment as being for a specific item, in the following order: (i) first, to Purchaser’s
reasonable costs of collection incurred with respect to such Tenant, (ii) second, to
Purchaser in payment of the current rent due under such Lease, (iii) third, to Purchaser in
payment of delinquent rent due under such Leases for the period from and after the Closing,
and (iv) fourth, to Seller in payment of rent coming due and payable prior to the Closing.
Any prepaid rents for the period on or following the Closing Date shall be paid over by
Seller to Purchaser. Purchaser will make commercially reasonable efforts, without suit, to
collect any rents relating to the period before Closing. Seller shall have the right to sue
delinquent Tenants for delinquent rent so long as Seller does not cause a termination of any
Leases.

     (g) Operating Expense Pass-Throughs. Seller, as landlord under the Leases, is
currently collecting from Tenants under the Leases additional rent over an expense stop to
cover taxes, insurance, utilities, common area maintenance and other operating costs and
expenses (collectively, “Operating Expense Pass-Throughs”) in connection with the ownership,
operation, maintenance and management of the Subject Property. Seller and Purchaser shall
each receive a debit or credit, as the case may be, for the difference between the Tenants’
collected account balance for Operating Expense Pass-Throughs and the amount of Operating
Expense Pass-Throughs due to or from Tenants as of the Closing Date. Operating Expense
Pass-Throughs for Seller’s period of ownership shall be reasonably estimated by the parties
if final bills are not available. If Seller was overpaid by any Tenant for the period with
respect to any such charges prior to Closing, Seller shall remit to Purchaser such estimated
overpayment at Closing. If Seller was underpaid by any Tenant for the period with respect
to any such charges prior to Closing,
Seller shall receive a credit at Closing for the amount of such estimated underpayment.

19

 

Any item in this Section 9(g) that is paid directly by any Tenant pursuant to its
Leases shall not be prorated between the parties, and Purchaser shall look to said Tenant to
pay such items. Seller and Purchaser agree to cooperate and use their good faith and
diligent efforts to do a true-up and make any necessary adjustments to the proration of the
Operating Expense Pass-Throughs within ninety (90) days after the calendar year end
following Closing.

     (h) Security Deposits. Purchaser shall receive a credit against the Purchase Price in
an amount equal to the sum of all unapplied cash security deposits in Seller’s possession
plus, if accrued interest on such security deposits must be reimbursed to any Tenant that
paid a security deposit, all interest accrued on such security deposits.

     (i) Recording Costs. Seller and Purchaser shall each pay one-half of the cost of any
recording costs, except Purchaser shall pay any and all recording costs in connection with
any loan documentation or mortgages recorded by Purchaser and/or Purchaser’s lender, if any.

     (j) Leasing Commissions for Renewals, Expansions and Options. Purchaser shall be
responsible to pay any leasing commissions due with respect to the renewal, expansion or
exercise of options on any Leases, as set forth on Exhibit B-1.

     (k) Insurance. Purchaser hereby acknowledges and agrees that all such insurance
maintained on behalf of or with respect to the Owner and the Subject Property will be
terminated as of the Closing Date.

     (l) Bank Accounts. Seller shall, or shall cause Owner to, close all bank accounts,
lock boxes, other depositories and safe deposit boxes relating to the Subject Property and
all property contained therein, to the extent it relates to the Subject Property shall be
delivered or transferred to the bank accounts, lock boxes, other depositories and safe
deposit boxes designated by Purchaser. Purchaser shall, or shall cause Owner to, establish
new bank accounts, lock boxes, other depositories and safe deposit boxes, to the extent it
deems necessary to operate the business of the Owner and the Subject Property from and after
the Closing Date.

     (m) Other Costs. All other costs shall be allocated in accordance with the customs
prevailing in similar transactions in the respective metropolitan areas where the Subject
Property is located.

Except as otherwise expressly provided in this Agreement, all prorations provided for herein shall
be final.

     10. Default/Remedies. IN THE EVENT OF A BREACH OR DEFAULT BY SELLER IN CLOSING THE
TRANSACTION CONTEMPLATED BY THIS AGREEMENT, PURCHASER, AS ITS SOLE AND EXCLUSIVE REMEDY, SHALL HAVE
THE RIGHT EITHER (I) TO TERMINATE THIS AGREEMENT AND RECEIVE A RETURN OF THE EARNEST MONEY AND
SELLER SHALL REIMBURSE PURCHASER FOR PURCHASER’S REASONABLE OUT OF POCKET COSTS UP TO A MAXIMUM
AMOUNT OF $37,500.00 ASSOCIATED WITH THE NEGOTIATION AND PREPARATION OF THIS AGREEMENT AND ITS
EXAMINATION OF THE PROPERTY, INCLUDING WITHOUT LIMITATION, THE FEES AND DISBURSEMENTS OF ITS
COUNSEL, ADVISERS, AND AGENTS, OR (II) TO ENFORCE SPECIFIC PERFORMANCE OF THIS AGREEMENT, PROVIDED
THAT ANY ACTION FOR SPECIFIC PERFORMANCE BE COMMENCED WITHIN NINETY (90) DAYS OF THE SCHEDULED
CLOSING DATE (OR SUCH LONGER PERIOD AS MAY BE REQUIRED BY LAW), AS THE SAME MAY HAVE BEEN
EXTENDED PURSUANT TO THE PROVISIONS HEREOF.

20

 

EXCEPT FOR THE SURVIVING INDEMNITY OBLIGATIONS,
WHICH SHALL SURVIVE TERMINATION OF THE AGREEMENT, IN THE EVENT OF A BREACH OR DEFAULT BY PURCHASER
IN CLOSING THE TRANSACTION CONTEMPLATED BY THIS AGREEMENT, SELLER, AS ITS SOLE AND EXCLUSIVE
REMEDY, SHALL HAVE THE RIGHT TO TERMINATE THIS AGREEMENT AND RECEIVE THE EARNEST MONEY AS
LIQUIDATED DAMAGES, IT BEING AGREED BY SELLER AND PURCHASER THAT THE DAMAGES TO SELLER IN CASE OF
DEFAULT BY PURCHASER MAY BE IMPOSSIBLE TO ASCERTAIN AND THAT THE EARNEST MONEY CONSTITUTES A FAIR
AND REASONABLE AMOUNT OF DAMAGES IN THE CIRCUMSTANCES AND IS NOT A PENALTY. NOTHING HEREIN
CONTAINED SHALL LIMIT THE RIGHTS OR OBLIGATIONS OF THE PARTIES WITH RESPECT TO A DEFAULT UNDER THIS
AGREEMENT OCCURRING AFTER THE CLOSING DATE, AND IN SUCH CASE THE PARTIES SHALL HAVE ALL RIGHTS AND
REMEDIES AVAILABLE AT LAW, IN EQUITY OR OTHERWISE INCLUDING, WITHOUT LIMITATION, THE RIGHT TO
SPECIFIC PERFORMANCE, SUBJECT TO THE CONDITIONS AND LIMITATIONS HEREIN SET FORTH, INCLUDING,
WITHOUT LIMITATION, THE PROVISIONS OF SECTION 6(b) HEREOF. NOTWITHSTANDING ANYTHING HEREIN
TO THE CONTRARY, NEITHER PARTY SHALL BE ENTITLED TO RECEIVE SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
PUNITIVE DAMAGES UNDER THIS AGREEMENT OR OTHER DOCUMENTS DELIVERED IN CONNECTION HEREWITH.

     11. Damage. If, prior to the Closing Date, all or any part of the Improvements are
substantially damaged by fire or other casualty, Seller shall promptly give notice to Purchaser of
such fact. Thereafter, at Purchaser’s option (to be exercised by Purchaser’s written notice to
Seller given within thirty (30) days after Seller’s initial notice to Purchaser), this Agreement
shall terminate with respect to the Subject Property. In the event of any such termination of this
Agreement, the Earnest Money shall be returned to Purchaser and thereafter neither party will have
any further obligations under this Agreement (other than the Surviving Indemnity Obligations, which
obligations shall survive any such termination), that Purchaser shall, at the request of Seller,
execute any document reasonably requested by Seller to evidence such termination including, without
limitation, a quit claim deed. If Purchaser fails to elect to terminate this Agreement (in the
manner provided in this Section 11) despite such damage, or if the Improvements are damaged
but not substantially, Seller shall promptly commence to repair such damage or destruction and to
return the damaged Improvements to substantially their condition prior to such damage. If such
damage shall be completely repaired prior to the Closing Date, then there shall be no reduction in
the Purchase Price, and Seller shall retain the proceeds of all insurance related to such damage.
If such damage shall not be completely repaired prior to the Closing Date, but Seller is diligently
proceeding to repair, then Seller shall complete the repair after the Closing Date and shall be
entitled to receive the proceeds of all insurance related to such damage; provided, however, that
Purchaser shall have the right to delay the Closing Date until repair is completed. For purposes
of this Section 11, the phrase “substantially damaged” means damage that gives rise to the
ability of the Tenant(s) leasing at least fifty percent (50%) of the rentable square feet in the
Subject Property (in the aggregate) to terminate such Tenants’ Lease(s) pursuant to the terms and
conditions of such Lease(s) and such Tenant(s) actually terminate such Lease(s).

     12. Condemnation. If, prior to the Closing Date, eminent domain proceedings are commenced
against all or any substantial part of the Subject Property, Seller shall immediately give notice
to Purchaser of such fact and, at Purchaser’s option (to be exercised within fifteen (15) days
after Seller’s notice), this Agreement shall terminate with respect to the Subject Property. In
the event of any such termination, the Earnest Money shall be returned to Purchaser and thereafter
neither party will have further obligations under this Agreement (other than the Surviving
Indemnity Obligations, which obligations shall survive any such termination), except that Purchaser
shall, at the request of Seller,
execute any document reasonably requested by Seller to evidence such termination including,
without limitation, a quit claim deed.

21

 

If Purchaser fails to elect to terminate this Agreement in
the manner provided in this Section 12, then there shall be no reduction in the Purchase
Price, and Seller shall assign to Purchaser at the Closing Date all of Seller’s right, title and
interest in and to any award made or to be made in the condemnation proceedings. Prior to the
Closing Date, Seller shall not designate counsel, appear in, or otherwise act with respect to the
condemnation proceedings without Purchaser’s prior written consent, which consent shall not be
unreasonably withheld or delayed; provided, however, that if any action is necessary with respect
to such proceeding to avoid any forfeiture or material prejudice, Seller shall be entitled to take
such action as and to the extent necessary without obtaining Purchaser’s prior written consent.
For purposes of this Section, the words “substantial part” means that the portion of the Subject
Property to be so taken gives rise to the ability of the Tenant(s) leasing at least fifty percent
(50%) of the rentable square feet in the Subject Property (in the aggregate) to terminate such
Tenants’ Lease(s) pursuant to the terms and conditions of such Lease(s) and such Tenant(s) actually
terminate such Lease(s).

     13. Broker’s Commissions. Seller represents to Purchaser that insofar as Seller knows, no
third party broker or finder has been engaged or consulted by Seller or is entitled to compensation
or commission in connection herewith, other than Grubb and Ellis (“Seller’s Broker”). Seller shall
be responsible to pay commissions due to Seller’s Broker in connection with the sale contemplated
by this Agreement. Seller shall defend, indemnify and hold harmless Purchaser from and against any
and all claims of brokers, finders of any like third party claiming any right to commission or
compensation by or through acts of Seller in connection herewith. Purchaser represents and
warrants to Seller that insofar as Purchaser knows, no third party broker or finder has been
engaged or consulted by Purchaser or is entitled to compensation or commission in connection
herewith. Purchaser shall defend, indemnify and hold harmless Seller from and against any and all
claims of brokers, finders or any like party claiming any right to commission or compensation by or
through acts of Purchaser in connection herewith. The indemnity obligations hereunder shall
include all damages, losses, risks, liabilities, and expenses (including reasonable attorneys’ fees
and costs) arising from and related to matters being indemnified hereunder, and shall survive
Closing and execution and delivery of the Deed; provided, however, the total liability of Seller
with respect to the foregoing indemnity obligation shall be subject to the conditions and
limitations set forth in Section 6(d) hereof.

     14. Environmental Disclosure. Certain federal laws and state laws, including without
limitation the Comprehensive Environmental Response Compensation & Liability Act of 1980 (CERCLA),
42 U.S.C. Section 9601 et seq., require sellers of certain real estate to disclose the existence of
hazardous substances located on or beneath the property being transferred. To satisfy such
obligations under any and all applicable laws, ordinance, rules and regulations, Seller hereby
discloses that the Real Property contains or contained such hazardous materials (if any) as
described in the environmental reports listed on Exhibit J attached hereto and made a part
hereof (the “Reports”). Seller shall deliver the Reports to Purchaser within three (3) business
days following the execution of this Agreement, and Purchaser shall acknowledge receipt of the
Reports. Purchaser acknowledges and agrees that the Reports are provided by Seller for
informational purposes only and that Seller makes no representations or warranties as to the
accuracy or completeness of the Reports. Purchaser will conduct its own investigations and studies
of the Subject Property as it deems necessary or appropriate in order to determine the presence or
absence of hazardous materials on or within the Subject Property. Purchaser hereby (a) agrees that
Purchaser is relying solely on its own investigation, if any, of the Subject Property covering the
effect of any hazardous materials that may be on about or within the Subject Property, whether
disclosed by such investigations or not (collectively, the “Hazardous Materials Effect”) and (b)
assumes the risk of any and all liabilities, claims, demands, suits, judgments, losses, damages,
expenses (including, without limitation, attorney’s fees) and other obligations arising out of or
incurred in connection with the Hazardous Materials Effect, if any.

22

 

     15. Assignment. Purchaser may not assign its rights under this Agreement without the prior
written consent of Seller; provided, however, Purchaser may assign its rights under this Agreement
to (i) Columbia Equity Trust, Inc. (the “REIT”), (ii) Columbia Equity, L.P. (the “OP”), or (iii)
any trust, corporation, partnership or limited liability company controlling, controlled by or
under common control with Purchaser, the REIT or the OP. For purposes hereof, “control” shall mean
ownership (directly or indirectly) of 51% or more of the voting or comparable ownership interest of
any such trust, corporation, partnership or limited liability company. Any assignment shall be
subject to all the provisions, terms, covenants and conditions of this Agreement and the assignor
shall, in any event, continue to be and remain liable under this Agreement, as it may be amended
from time to time, as a principal and not as a surety, without notice to such assignor. Any such
assignment and assumption shall be evidenced by a written agreement in form and substance
reasonably acceptable to Seller.

     16. [Intentionally Omitted].

     17. Catastrophic Environmental Event. If, after the Contingency Date and prior to the Closing
Date, any Catastrophic Environmental Event (as defined below) occurs with respect to the Subject
Property, Seller shall give notice to Purchaser of such fact promptly after Seller becomes aware of
such occurrence. Thereafter, at Purchaser’s option (to be exercised by Purchaser’s written notice
to Seller given within thirty (30) days after Seller’s initial notice to Purchaser), this Agreement
shall terminate. In the event of any such termination of this Agreement, neither party will have
any further obligations under this Agreement (other than the Surviving Indemnity Obligations, which
obligations shall survive any such termination), except that Purchaser shall, at the request of
Seller, execute any document reasonably requested by Seller to evidence such termination including,
without limitation, a quit claim deed. If Purchaser fails to elect to terminate this Agreement in
the manner provided in this Section 17, then there shall be no reduction in the Purchase
Price, and the parties shall proceed to Closing upon the terms and conditions of this Agreement.
For purposes of this Section 17, the phrase “Catastrophic Environmental Event” means an
adverse environmental event on the Subject Property resulting in a violation of applicable
environmental laws requiring cleanup. Notwithstanding the foregoing, an adverse environmental
event shall not be a Catastrophic Environmental Event if a “no further action” letter addressed to
Seller or a “no association” letter addressed to Purchaser, or their equivalents, has been received
from the relevant governmental authorities prior to Closing.

     18. Notices. Any notice or other communication in connection with this Agreement shall be in
writing and shall be sent by nationally recognized overnight courier guaranteed next business day
delivery, by telecopy or facsimile transmission (provided that such notice sent by facsimile is
also sent via nationally recognized overnight courier for guaranteed next business day delivery),
or by personal delivery, properly addressed as follows:

	 	 	 	 	 
	 

	 	If to Seller:
	 	PARK PLAZA PARTNERS, L.L.C.
	 

	 	 	 	10350 Bren Road West
	 

	 	 	 	Minnetonka, MN 55343
	 

	 	 	 	Attn: Vice President, Asset Management
	 

	 	 	 	Facsimile No.: (952) 656-4750
	 
	 	 	 	 
	 

	 	With a copy to:
	 	Opus L.L.C.
	 

	 	 	 	10350 Bren Road West
	 

	 	 	 	Minnetonka, MN 55343
	 

	 	 	 	Attn: Legal Department
	 

	 	 	 	Facsimile No.: (952) 656-4755

23

 

	 	 	 	 	 
	 

	 	And a copy to:
	 	Briggs and Morgan, Professional Association
	 
	 

	 	 	 	2200 IDS Center
	 

	 	 	 	Minneapolis, MN 55402
	 

	 	 	 	Attn: Charles R. Haynor, Esq.
	 

	 	 	 	Facsimile No. (612) 977-8650
	 
	 	 	 	 
	 

	 	If to Purchaser:
	 	Columbia Equity Trust, Inc.
	 

	 	 	 	1750 H Street, NW, Suite 500
	 

	 	 	 	Washington, D.C. 20006
	 

	 	 	 	Attn: Oliver T. Carr, III
	 

	 	 	 	Facsimile No.: (202) 303-3078
	 
	 	 	 	 
	 

	 	With a copy to:
	 	Hunton &Williams LLP
	 

	 	 	 	1900 K Street, NW
	 

	 	 	 	Washington, D.C. 20006-1109
	 

	 	 	 	Attn: John M. Ratino, Esq.
	 

	 	 	 	Facsimile No.: (202) 828-3779

All notices shall be deemed given one (1) business day following deposit if delivered to an
overnight courier guaranteeing next day delivery and on the same day if sent by personal delivery
or by telecopy or facsimile transmission (with proof of transmission). Attorneys for each party
shall be authorized to give notices for each such party. Notwithstanding anything herein to the
contrary, in the event any notice is required hereunder within a period of less than three (3)
business days, such notice shall be given by facsimile transmission, personal delivery or overnight
courier, all as provided above. Any party may change its address for the service of notice by
giving written notice of such change to the other party, in any manner above specified.

     19. Captions. The section headings or captions appearing in this Agreement are for
convenience only, are not a part of this Agreement, and are not to be considered in interpreting
this Agreement.

     20. Entire Agreement; Modification. This Agreement constitutes the entire agreement between
the parties with respect to the subject matter herein contained, and all prior negotiations,
discussions, writings and agreements between the parties with respect to the subject matter herein
contained are superseded and of no further force and effect. No covenant, term or condition of
this Agreement shall be deemed to have been waived by either party, unless such waiver is in
writing signed by the party charged with such waiver.

     21. Binding Effect. This Agreement shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and permitted assigns.

     22. Controlling Law. This Agreement shall be governed by and construed in accordance with the
laws of the State of Maryland.

     23. Severability. The unenforceability or invalidity of any provisions hereof shall not
render any other provision herein contained unenforceable or invalid.

24

 

     24. “As Is” Sale. PURCHASER ACKNOWLEDGES THAT EXCEPT AS SET FORTH IN SECTION 5 OF
THIS AGREEMENT (A) NEITHER SELLER, OWNER, NOR ANY PRINCIPAL, AGENT, ATTORNEY, EMPLOYEE, BROKER, OR
OTHER REPRESENTATIVE OF SELLER OR OWNER, HAS MADE ANY REPRESENTATION OR WARRANTY OF ANY KIND
WHATSOEVER, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE SUBJECT PROPERTY OR ANY
MATTER RELATED THERETO, AND (B) PURCHASER IS NOT RELYING ON ANY WARRANTY, REPRESENTATION, OR
COVENANT, EXPRESS OR IMPLIED, WITH RESPECT TO THE CONDITION OF THE SUBJECT PROPERTY, AND THAT
PURCHASER IS ACQUIRING THE SUBJECT PROPERTY IN ITS “AS-IS” CONDITION WITH ALL FAULTS, AND (C)
PURCHASER RELEASES SELLER AND OWNER FROM ANY CLAIMS, DAMAGES OR LIABILITIES RELATING TO THE
CONDITION OF THE SUBJECT PROPERTY. IN PARTICULAR, BUT WITHOUT LIMITATION, EXCEPT AS SET FORTH IN
SECTION 5 OF THIS AGREEMENT, NEITHER SELLER NOR OWNER MAKE ANY REPRESENTATIONS OR
WARRANTIES WITH RESPECT TO THE USE, CONDITION, OCCUPATION OR MANAGEMENT OF THE SUBJECT PROPERTY,
COMPLIANCE OF THE SUBJECT PROPERTY WITH APPLICABLE STATUTES, LAWS, CODES, ORDINANCES, REGULATIONS
OR REQUIREMENTS OR COMPLIANCE OF THE SUBJECT PROPERTY WITH COVENANTS, CONDITIONS, AND RESTRICTIONS,
WHETHER OR NOT OF RECORD. PURCHASER’S WAIVERS APPLY TO ALL CLAIMS OF ANY NATURE WHATSOEVER,
WHETHER KNOWN OR UNKNOWN, SUSPECTED OR UNSUSPECTED, ABSOLUTE OR CONTINGENT, AND WHETHER OR NOT
DISCOVERABLE BY PURCHASER, THAT PURCHASER NOW HOLDS OR MAY HOLD AT ANY TIME IN THE FUTURE.

     25. Indemnification for Lease Claims. Seller will indemnify, defend and hold harmless
Purchaser from any and all liabilities, claims, damages, costs or expenses (including reasonable
attorneys’ fees) arising from claims by Tenants under the Leases as a result of any obligations and
duties of the landlord thereunder arising prior to the Closing Date, except for claims relating to
the physical condition of the Subject Property or any Hazardous Materials Effect. Purchaser will
indemnify, defend and hold harmless Seller from any and all liabilities, claims, damages, costs or
expenses (including reasonable attorneys’ fees) arising from claims by Tenants under the Leases as
a result of any obligations and duties of landlord thereunder arising on or after the Closing Date.
The indemnification obligations contained in this Section 25 shall survive Closing.

     26. Time of Essence. Time is of the essence of this Agreement.

     27. Counterparts. This Agreement may be executed in any number of counterparts, each of which
shall be deemed an original, but all of which together shall constitute one and the same
instrument.

     28. Interpretation. In the event an ambiguity or question of intent or interpretation arises,
this Agreement shall be construed as if drafted jointly by the parties hereto and no presumption or
burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any of
the provisions of this Agreement.

     29. Return of Documents; Confidentiality; Exclusivity. In the event that this Agreement is
terminated or cancelled without Purchaser acquiring the Membership Units pursuant to the terms
hereof, Purchaser shall, within five (5) business days thereafter, deliver to Seller all due
diligence materials delivered by Seller or Owner to Purchaser. Prior to the Closing, Purchaser
agrees not to disclose any due diligence materials to third parties, except that Purchaser may
disclose such information to (i) those employed or engaged by Purchaser in connection with
Purchaser’s due diligence investigations, (ii) to Purchaser’s attorneys, potential lenders, title
and escrow officers and others involved in connection with the transactions described in this
Agreement, (iii) to Purchaser’s directors, officers, shareholders, partners, subsidiaries and other
affiliates, (iv) to the extent required by law (including disclosure by the REIT, as determined in
Purchaser’s sole discretion, in any registration statement or other filing with the U.S. Securities
and Exchange Commission), subpoena or court order. Purchaser shall indemnify, defend and hold
Seller and Owner harmless from and against any and all claims, demands, causes of action, losses,
damages, liabilities, judgments, costs and expenses (including attorney’s fees)
asserted against or incurred by Seller or Owner as a result of any violation of, or failure to
comply with this Section 29.

25

 

Seller agrees that during the continuance of this Agreement,
Seller shall not offer the Membership Units nor permit Owner to offer the Subject Property (or any
interest therein) for sale or lease, except for lease of office or industrial space and license, of
parking spaces in the ordinary course of business, to any other party, or negotiate, solicit or
entertain any offers to purchase or lease the Subject Property (or any interest therein) other than
lease of office or industrial space in the ordinary course of business The obligations in this
Section 29 shall survive Closing or termination of this Agreement.

     30. Attorneys’ Fees. If either party commences an action against the other to enforce this
Agreement or because of the breach by either party of this Agreement, the prevailing party in such
action shall be entitled to recover reasonable attorney fees, costs, and expenses (including expert
fees and costs) incurred in connection with the prosecution or defense of such action, including
any appeal, in addition to all other relief.

     31. Schedule and Exhibits. The following schedule and exhibits are made a part hereof, with
the same force and effect as if specifically set forth herein:

	 	 	 	 	 	 	 
	 

	 	Exhibit A
	 	-
	 	Legal Description
	 

	 	Exhibit B
	 	-
	 	Schedule of Leases
	 

	 	Exhibit B-1
	 	-
	 	Outstanding Broker Commissions
	 

	 	Exhibit C
	 	-
	 	Schedule of Permits
	 

	 	Exhibit D
	 	-
	 	Schedule of Service Contracts
	 

	 	Exhibit E
	 	-
	 	Schedule of Warranties
	 

	 	Exhibit F
	 	-
	 	Form of Earnest Money Escrow Agreement
	 

	 	Exhibit G
	 	-
	 	Intentionally Omitted
	 

	 	Exhibit H
	 	-
	 	Owner Disclosure Schedule
	 

	 	Exhibit I
	 	-
	 	Form of Tenant Estoppel Certificate
	 

	 	Exhibit I-1
	 	 	 	Form of Ground Lease Estoppel
	 

	 	Exhibit J
	 	-
	 	List of Environmental Reports
	 

	 	Exhibit K
	 	-
	 	Additional Information
	 

	 	Exhibit L
	 	-
	 	Tenant Notice

[Signature Pages Follow]

26

 

     IN WITNESS WHEREOF, Seller and Purchaser have executed this Agreement as of the day and year
first above written.

	 	 	 	 	 
	 

	 	SELLER:	 	 
	 
	 	 	 	 
	 

	 	PARK PLAZA PARTNERS, L.L.C., a Delaware limited
liability company
	 	 
	 
	 	 	 	 
	 

	 	By: /s/ Luz Campa	 	 
	 

	 	Name: Luz Campa	 	 
	 

	 	Its: Vice President	 	 

     Opus East, L.L.C., a Delaware limited liabilty company (“Company”) hereby joins this Agreement
for the sole purpose of agreeing to perform, and to be jointly and severally liable for the
performance of, Sellers’ obligations under the Warranty set forth in Section 6(b) of this
Agreement, provided that in no event shall Company’s total liability under this joinder paragraph
exceed One Million One Hundred Thousand and No/100 Dollars ($1,100,000.00) in the aggregate for a
breach or breaches of the representations in Sections 5(a)-(i),
(q)-(t), (v) and (w) set forth herein, which liability limit shall
survive Closing .

	 	 	 	 	 
	 

	 	OPUS EAST, L.L.C., a Delaware limited liability
company
	 	 
	 
	 	 	 	 
	 

	 	By: /s/ Luz Campa	 	 
	 

	 	Name: Luz Campa	 	 
	 

	 	Its: Vice President	 	 

[Signature Page to Purchase Agreement (Park Plaza II)]

27

 

     IN WITNESS WHEREOF, Seller and Purchaser have executed this Agreement as of the day and year
first above written.

	 	 	 
	 

	 	PURCHASER:
	 
	 	 
	 

	 	COLUMBIA EQUITY TRUST, INC.,

a Maryland corporation
	 
	 	 
	 

	 	By: /s/ Oliver T. Carr, III
	 

	 	Name: Oliver T. Carr, III

Title: Chief Executive Officer

[Signature Page to Purchase Agreement (Park Plaza II)]

28

 

Exhibit A

Legal Description

All that lot or parcel of land lying and being in Montgomery County, Maryland and being more
particularly described as follows:

Being a portion of Lot 3 as shown on a plat entitled “Plat of Street Dedication, Gaither Road, thru
part of Lot 3, DANAC Technological Park” recorded in Plat Book 154 as Plat 17491 among the Land
Records of Montgomery County, Maryland, and being more particularly described as follows:

Beginning for the same at a point marking the easterly common corner with Lot 4, DANAC
Technological Park, recorded in Plat Book 82 as Plat 8444 among the aforesaid Land Records, said
point also marking the easterly end of the South 61 degrees 32' 29" East 581.24 foot line of said
plat (PB 154 P 17491), thence running with the outline of said Lot 3, the following three (3)
courses and distances:

	1.)	 	South 18 degrees 34' 33" West, 74.65 feet to a point, thence
	 
	2.)	 	North 53 degrees 30' 24" East, 109.51 feet to a point, thence
	 
	3.)	 	South 12 degrees 56' 57" East, 204.93 feet to a point, thence departing said outline of Lot 3
and running so as to cross and include a portion of Lot 3, the following fourteen (14) courses
and distances
	 
	4.)	 	South 78 degrees 09' 19" West, 75.05 feet to a point, thence
	 
	5.)	 	South 77 degrees 15' 26" West, 27.10 feet to a point, thence
	 
	6.)	 	South 77 degrees 30' 09" West, 55.04 feet to a point, thence
	 
	7.)	 	South 13 degrees 00' 59" East, 101.26 feet to a point, thence
	 
	8.)	 	South 19 degrees 12' 21" West, 3.04 feet to a point, thence
	 
	9.)	 	North 61 degrees 31' 41" West, 151.69 feet to a point, thence
	 
	10.)	 	South 27 degrees 26' 55" West, 18.84 feet to a point, thence
	 
	11.)	 	North 61 degrees 20' 53" West, 154.88 feet to a point, thence
	 
	12.)	 	North 61 degrees 53' 10" West, 73.61 feet to a point, thence
	 
	13.)	 	North 28 degrees 28' 21" East, 233.07 feet to a point, thence
	 
	14.)	 	North 61 degrees 32' 37" West, 309.21 feet to a point, thence
	 
	15.)	 	North 30 degrees 11' 27" East, 136.08 feet to a point, thence
	 
	16.)	 	South 61 degrees 32' 29" East, 407.29 feet to a point, thence
	 
	17.)	 	North 72 degrees 34' 53" East, 103.09 feet to the point of beginning containing 173,990
square feet or 3.99426 acres of land, more or less.

Together with easements described in Ownership Plat Declaration of Covenants, Easements and
Restrictions recorded in Liber 18709 at folio 734 and Declaration of Covenants, Conditions and
Restrictions recorded in Liber 19098 19098 at folio 74.

A-1

 

Exhibit B

Schedule of Leases 

	1.	 	Multi-tenant Office Lease Agreement dated August 20, 2001 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and SI International, Inc., a
Delaware corporation, as tenant.
	 
	2.	 	Multi-tenant Office Lease Agreement dated October 25, 2001 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and Proxy Monitor Services, Inc.,
d/b/a Institutional Shareholder Services, a Delaware corporation, as tenant.
	 
	 	 	Commencement Date Memorandum dated August 7, 2002 by and between Park Plaza II, L.L.C., a
Delaware limited liability company, as landlord, and Proxy Monitor Services, Inc., and
Institutional Shareholder Services, a Delaware corporation, formerly known as Proxy Monitor
Services, Inc., as tenant.
	 
	 	 	First Amendment to Multitenant Office Lease dated September 24, 2003 by and between Park
Plaza II, L.L.C., a Delaware limited liability company, as landlord, and Institutional
Shareholder Services, Inc., a Delaware corporation, as tenant.
	 
	 	 	Supplemental Commencement Date Memorandum dated December 3, 2003 by and between Park Plaza
II, L.L.C., a Delaware limited liability company, as landlord, and Institutional Shareholder
Services, Inc., a Delaware corporation, as tenant.
	 
	3.	 	Multi-tenant Office Lease Agreement dated December 10, 2001 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and Opus East, L.L.C., a Delaware
limited liability company, as tenant.
	 
	 	 	First Amendment to Multitenant Office Lease dated December 15, 2004 by and between Park
Plaza II, L.L.C., a Delaware limited liability company, as landlord, and Opus East, L.L.C.,
a Delaware limited liability company, as tenant.
	 
	4.	 	Multi-tenant Office Lease Agreement dated April 22, 2003 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and Steben & Company, Inc., a
Maryland corporation, as tenant.
	 
	 	 	Commencement Date Memorandum dated July 28, 2003 by and between Park Plaza II, L.L.C., a
Delaware limited liability company, as landlord, and Steben & Company, Inc., a Maryland
corporation, as tenant.
	 
	 	 	First Amendment to Multitenant Office Lease dated February 28, 2005 by and between Park
Plaza II, L.L.C., a Delaware limited liability company, as landlord, and Steben & Company,
Inc., a Maryland corporation, as tenant.

B-1

 

	 	 	Amended and Restated First Amendment to Multitenant Office Lease dated March 15, 2005 by and
between Park Plaza II, L.L.C., a Delaware limited liability company, as landlord, and Steben & Company, Inc., a Maryland corporation, as tenant, which amends and
restates in its entirety that certain First Amendment to Multitenant Office Lease dated
February 28, 2005 by and between Park Plaza II, L.L.C., a Delaware limited liability
company, as landlord, and Steben & Company, Inc., a Maryland corporation, as tenant.
	 
	5.	 	Multi-tenant Office Lease Agreement dated January 9, 2004 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and Metrix Technologies, Inc., a
Maryland corporation, as tenant.
	 
	 	 	Commencement Date Memorandum dated March 12, 2004 by and between Park Plaza II, L.L.C., a
Delaware limited liability company, as landlord, and Metrix Technologies, Inc., a Maryland
corporation, as tenant.
	 
	6.	 	Multi-tenant Office Lease Agreement dated December 13, 2004 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and Wealth Strategies Group, Inc.,
a Maryland corporation, as tenant.
	 
	 	 	Commencement Date Memorandum dated June 13, 2005 by and between Park Plaza II, L.L.C., a
Delaware limited liability company, as landlord, and Wealth Strategies Group, Inc., a
Maryland corporation, as tenant.
	 
	7.	 	Multi-tenant Office Lease Agreement dated March 10, 2005 by and between Park Plaza II,
L.L.C., a Delaware limited liability company, as landlord, and Interwoven, Inc., a Delaware
corporation, as tenant.

B-2

 

Exhibit B-1

Outstanding Broker Commissions (Leases)

NONE.

B-1-1

 

Exhibit C

Schedule of Permits 

C-1

 

Exhibit D

Schedule of Service Contracts 

	1.	 	Common Area Property Management Agreement dated 12/20/2001 between Estate of James
Campbell, Deceased, Owner and Insignia/ESG, Inc.
	 
	2.	 	See attached list of vendors for additional Service Contracts.

D-1

 

Exhibit E

Schedule of Warranties

See attached

E-1

 

Exhibit F

Earnest Money Escrow Agreement

     THIS EARNEST MONEY ESCROW AGREEMENT (“Agreement”) is made as of                           , 2005, by
and among PARK PLAZA PARTNERS, L.L.C., a Delaware limited liability company (“Seller”), COLUMBIA
EQUITY TRUST, INC., a Maryland corporation (“Purchaser”), and CHICAGO TITLE INSURANCE COMPANY, a
                     corporation (“Escrow Agent”).

RECITALS:

     A. By that certain Membership Units Purchase Agreement dated as of August ___, 2005 (“Purchase
Agreement”), between Seller and Purchaser, Seller has agreed to sell to Purchaser and Purchaser has
agreed to purchase from Seller all the membership interests in Park Plaza II, L.L.C., a Delaware
limited liability company (“Owner”), upon and subject to the terms and provisions set forth in the
Purchase Agreement. Pursuant to the terms and provisions of the Purchase Agreement, Purchaser has
agreed to deposit into escrow with Escrow Agent the sum in cash of $200,000 earnest money as
Initial Earnest Money (as defined therein) and the sum in cash of $300,000 earnest money as
Additional Earnest Money (as defined therein) (together with the interest thereon less any
investment fees related thereto, the Initial Earnest Money and Additional Earnest Money shall be
referred to as the “Earnest Money”), to be held, invested and disbursed by Escrow Agent in
accordance with the terms and conditions of this Agreement.

     B. Escrow Agent has agreed to act as escrow agent to hold, administer, invest and disburse the
Earnest Money on the terms and conditions herein set forth.

     C. Unless otherwise provided herein, all capitalized words and terms used herein shall have
the same meanings ascribed to such words and terms as in the Purchase Agreement.

AGREEMENTS:

     NOW THEREFORE, in consideration of the mutual covenants and agreements hereinafter set forth
and other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby agree as follows:

     32. Escrow Agent shall notify Seller and Purchaser in writing upon Escrow Agent’s receipt of
either the Earnest Money or the Additional Earnest Money promptly upon Escrow Agent’s receipt of
the same.

     33. Escrow Agent shall hold, administer and disburse the Earnest Money pursuant to this
Agreement. Escrow Agent, in accordance with written instructions to it from time to time from
Purchaser, shall invest, and from time to time reinvest, the Earnest Money as so instructed by
Purchaser.

     34. Purchaser’s Tax Identification Number is                     .

     35. Escrow Agent shall not be responsible for any penalties or loss of interest or any delays
in withdrawing funds which may be incurred upon withdrawal of the Earnest Money in accordance with
instructions given hereunder except to the extent attributable to Escrow Agent’s negligence.

F-1

 

     36. (a) Upon not less than five (5) business days’ prior written notice executed by Seller
and delivered to both Purchaser and Escrow Agent in accordance with Section 7 below, asserting that
Seller is entitled to retain the Earnest Money pursuant to the terms of the Purchase Agreement,
Escrow Agent shall deliver the Earnest Money to Seller; provided, however, that if Purchaser shall,
within said 5 business day period, deliver to Seller and Escrow Agent a written notice that it
disputes Seller’s claim to the Earnest Money, Escrow Agent shall retain the Earnest Money until it
receives written instructions executed by both Seller and Purchaser as to the disposition and
disbursement of the Earnest Money, or until ordered by final court, decree or judgment in a
proceeding in which Purchaser and Seller are parties, which is not subject to appeal, to deliver
the Earnest Money to a particular party, in which event the Earnest Money shall be delivered in
accordance with such notice, instruction, order, decree or judgment.

     (b) Upon not less than five (5) business days’ prior written notice executed by
Purchaser and delivered to Seller and Escrow Agent in accordance with Section 7
below, asserting that Purchaser is entitled to the return of the Earnest Money pursuant to
the terms of the Purchase Agreement, Escrow Agent shall deliver the Earnest Money to
Purchaser; provided, however, that if Seller shall, within said 5 business day period,
deliver to Purchaser and Escrow Agent a written notice that it disputes Purchaser’s claim or
right to receive back the Earnest Money, Escrow Agent shall retain the Earnest Money until
it receives written instructions executed by both Seller and Purchaser as to the disposition
and disbursement of the Earnest Money, or until ordered by final court order, decree or
judgment in which Purchaser and Seller are parties, which is not subject to appeal, to
deliver the Earnest Money to a particular party, in which event the Earnest Money shall be
delivered in accordance with such notice, instruction, order, decree or judgment.

     (c) Subject to the foregoing, this Agreement shall at all times be subject to the joint
order of Seller and Purchaser and upon such joint order Escrow Agent shall deliver the
Earnest Money as instructed by such joint order.

     37. Seller and Purchaser shall each be responsible for payment of one-half of any escrow fee
hereunder. Purchaser shall be responsible for payment of any investment fee.

     38. Any notice or other communication in connection with this Agreement shall be in writing
and shall be sent by United States Certified Mail, return receipt requested, postage prepaid, by
nationally recognized overnight courier guarantee next day delivery, by telecopy, or by personal
delivery, properly addressed as follows:

	 	 	 
	If to Seller:

	 	Park Plaza Partners, L.L.C.
	 

	 	10350 Bren Road West
	 

	 	Minnetonka, MN 55343
	 

	 	Attn: Vice President, Asset Management
	 

	 	Facsimile No.: (952) 656-4750
	 
	 	 
	With a copy to:

	 	Opus, L.L.C.
	 

	 	10350 Bren Road West
	 

	 	Minnetonka, Minnesota 55343
	 

	 	Attn: Legal Department
	 

	 	Facsimile No.: (952) 656-4750
	 
	 	 
	And a copy to:

	 	Briggs and Morgan, P.A.
	 

	 	2200 IDS Center
	 

	 	Minneapolis, MN 55402
	 

	 	Attn: Charles R. Haynor
	 

	 	Facsimile No.: (612) 977-8650

F-2

 

	 	 	 
	If to Purchaser:

	 	Columbia Equity Trust, Inc.
	 

	 	1750 H Street, NW, Suite 500
	 

	 	Washington, D.C. 20006
	 

	 	Attn: Oliver T. Carr, III
	 

	 	Facsimile No.: (202) 303-3078
	 
	 	 
	With a copy to:

	 	Hunton &Williams LLP
	 

	 	1900 K Street, NW
	 

	 	Washington, D.C. 20006-1109
	 

	 	Attn: John M. Ratino, Esq.
	 

	 	Facsimile No.: (202) 828-3779
	 
	 	 
	If to Escrow Agent:

	 	Chicago Title Insurance Company
	 

	 	1129 20th Street N.W.
	 

	 	Suite 300
	 

	 	Washington, D.C. 20036
	 

	 	Attn:                     
	 

	 	Facsimile No.: (     )      -     

     All notices shall be deemed given three (3) business days following deposit in the United
States mail with respect to certified or registered letters, one (1) business day following deposit
if delivered to an overnight courier guaranteeing next day delivery and on the same day if sent by
personal delivery or telecopy (with proof of transmission). Attorneys for each party shall be
authorized to give notices for each such party. Any party may change its address for the service
of notice by giving written notice of such change to the other party, in any manner above
specified.

     39. This Agreement shall be binding upon and inure to the benefit of the parties hereto and
their respective successors and permitted assigns under the Purchase Agreement.

     40. This Agreement shall be governed by and construed in accordance with the laws of the State
of Maryland. In the event that any provision hereof shall be deemed illegal or unenforceable, said
provision shall be severed herefrom and the remainder of this Agreement shall be enforced in
accordance with the intentions of the parties as herein expressed.

     41. This Agreement may not be amended or altered except by an instrument in writing executed
by all the parties hereto.

     42. Except as to deposits of funds for which Escrow Agent has received express written
direction concerning investment or other handling, the parties hereto agree that the Escrow Agent
shall invest the Earnest Money in Escrow Agent’s customary money market account; provided, however,
nothing herein shall diminish Escrow Agent’s obligation to apply the full amount of the deposit
together with interest thereon in accordance with the terms of these escrow trust instructions.

     43. If any party shall bring suit against the other to enforce the terms of this Agreement,
the losing party shall pay to the prevailing party the prevailing party’s costs and expenses
(including, without limitation, reasonable attorneys’ fees and costs) incurred in enforcing this
Agreement.

[Signature Page Follows]

F-3

 

     IN WITNESS WHEREOF, Seller, Purchaser and Escrow Agent have executed this Agreement as of the
day and year first above written.

	 	 	 	 	 	 	 
	 

	 	SELLER:	 	 	 	 
	 
	 	 	 	 	 	 
	 	 	PARK PLAZA PARTNERS, L.L.C., a Delaware 

limited liability company	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	Name:
	 	 

	 	 
	 

	 	Its:
	 	 

	 	 
	 

	 	 	 	 

	 	 

F-4

 

     IN WITNESS WHEREOF, Seller, Purchaser and Escrow Agent have executed this Agreement as of the
day and year first above written.

	 	 	 	 	 	 	 
	 

	 	PURCHASER:	 	 	 	 
	 
	 	 	 	 	 	 
	 	 	COLUMBIA EQUITY TRUST, INC., 

A Maryland corporation	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	Name:
	 	 

	 	 
	 

	 	Title:
	 	 

	 	 
	 

	 	 	 	 

	 	 

F-5

 

     IN WITNESS WHEREOF, Seller, Purchaser and Escrow Agent have executed this Agreement as of the
day and year first above written.

	 	 	 	 	 	 	 
	 

	 	ESCROW AGENT:	 	 	 	 
	 
	 	 	 	 	 	 
	 	 	CHICAGO TITLE INSURANCE COMPANY, a 

California corporation	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	Name:
	 	 

	 	 
	 

	 	Its:
	 	 

	 	 
	 

	 	 	 	 

	 	 

F-6

 

Exhibit G

Intentionally Omitted

G-1

 

Exhibit H

Owner Disclosure Schedule

	1.	 	Amendments to Owner’s organizational documents (See Section 5(k) of Purchase Agreement)

None

	2.	 	Additional financial statement disclosure items since date of Financial Statements (See
Sections 5(n) and 5(o) of Purchase Agreements)

None

	3.	 	Compliance with Legal Requirements (See Sections 5(p) of Purchase Agreement)

None

	4.	 	Litigation (See Section 5(t) of Purchase Agreement)

None

	5.	 	Tax Matters (See Section 5(u) of Purchase Agreement)

Real Estate Taxes to Montgomery County, MD

Annual Filing Fee to the State of Delaware

	6.	 	Insurance (See Section 5(x) of Purchase Agreement)

See attached certificates.

H-1

 

Exhibit I

Form of Tenant Estoppel Certificate

Tenant’s Estoppel Certificate

August                     , 2005

Columbia Equity Trust, Inc. (“Purchaser”)

1750 H Street, NW

Suite 500

Washington, D.C. 20006

	 	 	 	 	 
	 

	 	Re:
	 	Park Plaza II
	 

	 	 	 	Address: 2099 Gaither Road, Rockville, MD

Ladies and Gentlemen:

     It is our understanding that Park Plaza Partners, L.L.C., a Delaware limited liability company
(“Seller”) proposes to transfer all of the membership interests owned by it in Park Plaza II,
L.L.C. (“PPII”) to Purchaser. As a condition precedent of Purchaser acquiring and Seller
transferring the membership interests, Seller, Purchaser, and PPII have required this certification
of the undersigned.

     The undersigned, as Tenant, under that certain                     , dated                     ,
20     , made with PPII, as Landlord, (as amended by                     ,dated                           , 200     , the
“Lease”), hereby ratifies the Lease and certifies that:

	 	1.	 	The current annual Basic Rent payable pursuant to the terms of the
Lease is $                     per annum; and further, additional rental pursuant to the
Lease is payable as follows: Tenant pays its pro-rata share of Excess Expenses
in excess of the Expense Stop of $                    ; and
	 
	 	2.	 	The Lease is in full force and effect and has not been assigned,
modified, supplemented or amended in any way except as noted above; and
	 
	 	3.	 	A true and correct copy of the Lease is attached hereto as Exhibit A.
The Lease represents the entire agreement between the parties as to the leasing
of the Premises. All capitalized terms used herein but not defined shall be
given the meaning assigned to them in the Lease; and
	 
	 	4.	 	On this date there are no existing defenses or offsets, claims or
counterclaims which the undersigned has against the enforcement of the Lease by
Landlord; and
	 
	 	5.	 	No rental has been paid in advance and no security (except the security
deposit in the amount of $                    ) has been deposited with Landlord; and
	 
	 	6.	 	The total rentable floor area of the Premises is                      square feet,
subject to adjustment as set forth in Section       of the Lease; and
	 
	 	7.	 	On this date there are no existing breaches or defaults by Landlord or
Tenant under the Leases that are known to Tenant; and

I-1

 

	 	8.	 	The term of the Lease commenced on                     . The Rent
Commencement Date under the Lease was                     . The Lease will
terminate on                     . The Tenant has no option to purchase all or any
part of the Property or, except as expressly set forth in the Lease, any option
to terminate or cancel the Lease. The Lease provides for                      extension
option; and
	 
	 	9.	 	Tenant has accepted possession of the Premises and there are no
outstanding Landlord obligations to perform tenant improvements.
	 
	 	10.	 	Tenant has not transferred, assigned, or sublet any portion of the
Premises nor entered into any license or concession agreements with respect
thereto except as follows (if none, please state
“none”):                                        .
	 
	 	11.	 	All monthly installments of Basic Rent and Excess Expenses have been
paid when due through                     , 2005. The current monthly installment of
Basic Rent is $                     and the current monthly installment of Excess
Expenses is $                    .
	 
	 	12.	 	Tenant’s current address for notice under the Lease
is:                                                            .

           Tenant acknowledges that this certificate may be delivered to Purchaser and its
successors and assigns, and acknowledges that such persons and any prospective lender will be
relying upon the statements contained herein in disbursing loan advances or making a new loan
secured by the Premises and that receipt of this certificate by lenders and Purchaser is a
condition of disbursing loan advances or making such loan or acquiring the Premises, respectively.
Without limitation, any entity formed by Purchaser to purchase the Property may rely upon this
Certificate.

           IN WITNESS WHEREOF, the undersigned has caused this certificate to be executed as of the
      day of                     , 2005.

	 	 	 	 	 	 	 
	 

	 	 	 	 	 	, Tenant
	 

	 	 	 	 	 	 
	 
	 

	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	 

	 	By
	 	 

	 	 
	 

	 	 	 	 	 	 
	 

	 	Its
	 	 

	 	 
	 

	 	 	 	 	 	 

I-2

 

Exhibit A to Tenant’s Estoppel

Lease

I-1

 

EXHIBIT I-1

Form of Ground Lease Estoppel

Landlord Estoppel Certificate

Columbia Equity Trust, Inc., (together with its

successors and assigns “Purchaser”)

1750 H Street, NW

Suite 500

Washington, D.C. 20006

	 	 	 	 	 
	 

	 	Re:
	 	Name of Subject Property: Park Plaza II (the “Property”)
	 

	 	 	 	Address: 2099 Gaither Road, Rockville, MD

Ladies and Gentlemen:

     It is our understanding that Park Plaza Partners, L.L.C., a Delaware limited liability company
(“Seller”) proposes to transfer all of the membership interests owned by it in Park Plaza II,
L.L.C. (“PPII”) to Purchaser. PPII owns the above referenced property. As a condition precedent
of Purchaser acquiring and Seller transferring the membership interests, Seller, Purchaser, and
PPII have required this certification of the undersigned.

     The undersigned, as Landlord, under that certain Ground Lease, dated August 10, 2000, made
with PPII, as Tenant, as amended by that certain First Amendment to Ground Lease dated as of
May 1, 2001 by and between Landlord and PPII, and as described in that certain Memorandum of Lease
dated August 10, 2000, recorded February 2, 2001 in Liber 18755 at Folio 214, as amended by that
certain First Amendment to Memorandum of Lease dated May 1, 2001, recorded May 2, 2001 in Liber
19098 at Folio 109, Clerk’s Office Montgomery County, Maryland (collectively, the “Lease”),
hereby ratifies the Lease and certifies that:

	 	1.	 	The current annual Rent payable pursuant to the terms of said lease is
$                     per annum; and
	 
	 	2.	 	The Lease is in full force and effect and has not been assigned,
modified, supplemented or amended in any way, except as noted above; and
	 
	 	3.	 	A true and correct copy of the Lease is attached hereto as Exhibit
A. The Lease represents the entire agreement between the parties as to the
leasing of the premises. All capitalized terms used herein but not defined
shall be given the meaning assigned such terms in the Lease; and
	 
	 	4.	 	On this date there are no existing breaches or defaults by Landlord or
Tenant under the Lease that are known to Landlord (based solely upon its
customary internal investigation with respect to similar requests and without
waiving any such default of Tenant should it learn, subsequent to its execution
hereof, that the Tenant was then in default); and

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	 	5.	 	The term of the Lease commenced on August 10, 2000 and will terminate
on August 9, 2006. The Lease has 14 five year extension options; and
	 
	 	6.	 	Landlord has been given the first offer to purchase the Property in
accordance with Section 36 of the Lease (“First Offer”) and Landlord has
unequivocally and unconditionally rejected the First Offer as more particularly
set forth in the Letter attached hereto as Exhibit B. Pursuant to
subsection (g) of Section 36, Section 36 has automatically terminated but
notwithstanding the foregoing, such Section 36(g) shall not be terminated if
the closing does not occur within one hundred eighty (180) days of the First
Offer (or second offer if applicable) as further described in Section 36(g);
and
	 
	 	7.	 	All monthly installments of Rent have been paid through                     , 2005
	 
	 	8.	 	Landlord’s current address for notice under the Leases is:

The Estate of James Campbell

425 California Street

Suite 1000

San Francisco, CA 94104-2112

Attention: Executive Vice President

Real Estate Investment Management

With a copy to:

Arnold & Porter LLP

555-12th Street N.W.

Washington, D.C. 20004

Attention: Jennifer S. Perkins, Esq.

Landlord acknowledges that this certificate may be delivered to Purchaser and its successors
and assigns, and acknowledges that such persons and any prospective lender will be relying
upon the statements contained herein in disbursing loan advances or making a new loan
secured by the Property and that receipt of this certificate by any such lender(s) and
Purchaser is a condition of disbursing loan advances or making such loan or acquiring the
membership interests, respectively. Without limitation, any entity formed by Purchaser to
purchase the membership interests may rely upon this Certificate.

IN WITNESS WHEREOF, the undersigned has caused this certificate to be executed as of the
      day of                     , 2005.

[Signatures follow on next page]

I-2

 

	 	 	 	 	 	 	 
	 	 	THE TRUSTEES UNDER THE WILL 
	 	 
	 	 	AND OF THE ESTATE OF JAMES 
	 	 
	 	 	CAMPBELL, DECEASED, 
	 	 
	 	 	acting in their fiduciary and not in their
	 	 
	 	 	individual capacities	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

C. R. Churchill
	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

D. A. Heenan
	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

Richard W. Gushman, II
	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

Ronald J. Zlatoper
	 	 

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Exhibit A to Landlord Estoppel

Lease

I-1

 

Exhibit B to Ground Lease Estoppel

Park Plaza II, L.L.C.

10350 Bren Road West

Minnetonka, MN 55343

Attention: President

Columbia Equity Trust, Inc.

1750 H Street NW

Suite 500

Washington, D.C. 20006

Attention: Oliver T. Carr, III

President

	 	 	 	 	 
	 

	 	Re:
	 	Ground Lease (Park Plaza II) dated as of August 10, 2000 (the “Ground Lease”) by and
between The Trustees Under the Will and of the Estate of James Campbell Deceased (“Landlord”) and
Park Plaza II, L.L.C., a Delaware limited liability company (“Tenant”), as amended by First
Amendment To Ground Lease dated as of May 1, 2001 by and between Landlord and Tenant (as amended,

the “Ground Lease”)

Gentlemen:

     Landlord and Tenant are parties to the above-referenced Ground Lease. All capitalized terms
not otherwise defined in this letter shall have the meanings assigned said terms in the Ground
Lease. This will confirm and acknowledge the following:

     1. In accordance with Section 36 of the Ground Lease, Tenant has offered to sell Tenant’s
Property to Landlord in writing upon the terms and conditions substantially identical to those set
forth in that certain letter of intent dated June 16, 2005 from Carr Capital Corporation (together
with its subsidiaries and affiliates, “Purchaser”) to Mr. Eric Berkman, Senior Vice President,
Grubb & Ellis, and said offer by Tenant to Landlord constituted the First Offer under the terms of
the Ground Lease.

     2. The Landlord has unequivocally and unconditionally rejected the First Offer.

     3. Subject to the provisions of Section 18 of the Ground Lease, the Landlord consents to the
transfer by Park Plaza Partners, L.L.C., a Delaware limited liability company (“Seller”) of all of
the membership interests in Tenant to Purchaser.

     4. Landlord agrees that Seller, Tenant and Purchaser will be relying on the foregoing in
proceeding with and closing the transfer by Seller of all of the membership interests in Tenant to
Purchaser.

Dated: _________________, 2005.

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	LANDLORD:	 	THE TRUSTEES UNDER THE WILL 
 AND OF THE ESTATE OF JAMES 
	 	 
	 	 	CAMPBELL, DECEASED, 
	 	 
	 	 	acting in their fiduciary and not in their
	 	 
	 	 	individual capacities	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

C. R. Churchill
	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

 D. A. Heenan
	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

Richard W. Gushman, II
	 	 
	 
	 	 	 	 	 	 
	 

	 	By	 	 	 	 
	 

	 	Name:
	 	 

Ronald J. Zlatoper
	 	 

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EXHIBIT J

List of Environmental Reports

	 	 	 	 	 	 	 
	Report	 	Company	 	Date	 	Conclusion
	 
	Phase I

Environmental

Assessment

	 	URS Corporation
	 	7/24/2000
	 	Further investigation -
possible
contamination from
past onsite
operations
	Phase II

Environmental

Assessment

	 	URS Corporation
	 	2/6/2001
	 	No evidence of
contamination, no
further
investigation
recommended

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EXHIBIT K

Additional Information

Requested Property Data

     1. The most recent ALTA survey for the Property;

     2. All executed leases (and amendments thereto) (the “Leases”) regarding all space
occupied by tenants at the Property (the “Tenants”);

     3. Copies of the tax and utility bills for the Property for calendar years 2003, 2004, and
2005;

     4. Operating statements (including operating expense information) prepared by the property
manager for the calendar years 2003, 2004 and 2005 YTD;

     5. The most recent environmental site assessment report;

     6. Construction and Design Documents: Base Building Documents (plans and specifications)
plus any revisions Tenant Improvement Plans Public Space Finish Specifications (if different from
Base Building Plans) Close out Manual for each TI project CADD drawings on disk, documentation and
plans for any subsequent renovations to the base building;

     7. Property Management: Control system plans as built and instructions Mechanical operation
and maintenance logs in Sellers possession;

     8. Copies of all warranties and warranty information;

     9. Certificate of occupancy/non-Residential Use Permits for the Property and all Tenant space
therein;

     10. Seller’s proposed operating budget for the Property for 2005;

     11. A current rent roll for the Property in the form currently maintained by Seller ;

     12. List of all security deposits, rent abatements, and Landlord payments to the Tenants
(including but not limited to tenant improvement allowances and architectural fees for test fits);

     13. Evidence of insurance delivered by the Tenants as required under the Leases;

     14. A list of all Service Agreements including service, maintenance, equipment and/or supply
contracts, and amendments thereto;

     15. Copies of any audits of reimbursable expenses reconciliations for 2003, 2004 and 2005;

     16. Month-by-month Account Receivables delinquency/aging report for June 2004 – June 2005; and

     17. Seller’s architect’s schedule and plans to support the rentable square footage and gross
building area calculations using the current BOMA method of measurement, to the extent the same is
in Seller’s possession.

K-1

 

EXHIBIT L

Form of Tenant Notice

[Purchaser’s Letterhead]

                                        , 2005

                                        

                                        

                                        

     Re: [Address] (the “Property”)

Dear                     :

Future rental payments with respect to your leased premises in the Property should be made payable
to “                                         ” and should be mailed to P.O. Box                     ,
                    ,                     -                    . If you prefer, we encourage you to wire transfer your payments
using the following instructions:

Please instruct your insurance carrier to provide to us a new Certificate of Insurance listing
“                                        , and its managing agent,
                                        ” as additional insureds.

	 	 	 	 	 	 	 
	 	 	Sincerely yours,	 	 
	 
	 	 	 	 	 	 
	 

	 	OWNER:	 	 	 	 
	 
	 	 	 	 	 	 
	 	 	PARK PLAZA II, L.L.C.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:	 	 	 	 
	 

	 	Name:
	 	 

	 	 
	 

	 	Title:
	 	 

	 	 
	 

	 	 	 	 

	 	 

L-1

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