Document:

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                                                                    Exhibit 10.3

                              EVERGREEN SOLAR, INC.

                        2000 EMPLOYEE STOCK PURCHASE PLAN

ARTICLE 1 - PURPOSE.

      This 2000 Employee Stock Purchase Plan (the "Plan") is intended to
encourage stock ownership by all eligible employees of Evergreen Solar, Inc.
(the "Company"), a Delaware corporation, and its participating subsidiaries (as
defined in Article 17) so that they may share in the growth of the Company by
acquiring or increasing their proprietary interest in the Company. The Plan is
designed to encourage eligible employees to remain in the employ of the Company
and its participating subsidiaries. The Plan is intended to constitute an
"employee stock purchase plan" within the meaning of Section 423(b) of the
Internal Revenue Code of 1986, as amended (the "Code").

ARTICLE 2 - ADMINISTRATION OF THE PLAN.

      The Plan may be administered by a committee appointed by the Board of
Directors of the Company (the "Committee"). The Committee shall consist of not
less than two members of the Company's Board of Directors. The Board of
Directors may from time to time remove members from, or add members to, the
Committee. Vacancies on the Committee, howsoever caused, shall be filled by the
Board of Directors. The Committee may select one of its members as Chairman, and
shall hold meetings at such times and places as it may determine. Acts by a
majority of the Committee, or acts reduced to or approved in writing by a
majority of the members of the Committee, shall be the valid acts of the
Committee.

      The interpretation and construction by the Committee of any provisions of
the Plan or of any option granted under it shall be final, unless otherwise
determined by the Board of Directors. The Committee may from time to time adopt
such rules and regulations for carrying out the Plan as it may deem best,
provided that any such rules and regulations shall be applied on a uniform basis
to all employees under the Plan. No member of the Board of Directors or the
Committee shall be liable for any action or determination made in good faith
with respect to the Plan or any option granted under it.

      In the event the Board of Directors fails to appoint or refrains from
appointing a Committee, the Board of Directors shall have all power and
authority to administer the Plan. In such event, the word "Committee" wherever
used herein shall be deemed to mean the Board of Directors.

ARTICLE 3 - ELIGIBLE EMPLOYEES.

      All employees of the Company or any of its participating subsidiaries
whose customary employment is more than 20 hours per week and for more than five
months in any calendar

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                                      -2-

year and who have completed 90 days of employment on or before the first day of
a Payment Period (as hereinafter defined) shall be eligible to receive options
under the Plan to purchase common stock of the Company, and all eligible
employees shall have the same rights and privileges hereunder. Persons who are
eligible employees on the first business day of any Payment Period (as defined
in Article 5) shall receive their options as of such day. Persons who become
eligible employees after any date on which options are granted under the Plan
shall be granted options on the first day of the next succeeding Payment Period
on which options are granted to eligible employees under the Plan. In no event,
however, may an employee be granted an option if such employee, immediately
after the option was granted, would be treated as owning stock possessing five
percent or more of the total combined voting power or value of all classes of
stock of the Company or of any parent corporation or subsidiary corporation, as
the terms "parent corporation" and "subsidiary corporation" are defined in
Section 424(e) and (f) of the Code. For purposes of determining stock ownership
under this paragraph, the rules of Section 424(d) of the Code shall apply, and
stock which the employee may purchase under outstanding options shall be treated
as stock owned by the employee.

ARTICLE 4 - STOCK SUBJECT TO THE PLAN.

      The stock subject to the options under the Plan shall be shares of the
Company's authorized but unissued common stock, par value $.01 per share (the
"Common Stock"), or shares of Common Stock reacquired by the Company, including
shares purchased in the open market. The aggregate number of shares which may be
issued pursuant to the Plan is 250,000, subject to adjustment as provided in
Article 12. If any option granted under the Plan shall expire or terminate for
any reason without having been exercised in full or shall cease for any reason
to be exercisable in whole or in part, the unpurchased shares subject thereto
shall again be available under the Plan.

ARTICLE 5 - PAYMENT PERIOD AND STOCK OPTIONS.

      The first Payment Period during which payroll deductions will be
accumulated under the Plan shall commence on the first day of the first calendar
month following effectiveness of the Form S-8 registration statement filed with
the Securities and Exchange Commission covering the shares to be issued pursuant
to the Plan (the "Commencement Date") and shall end on the next succeeding
January 31 or July 31, whichever comes first, following at least six months
after the Commencement Date. For the remainder of the duration of the Plan,
Payment Periods shall consist of the six-month periods commencing on February 1
and August 1 and ending on January 31 and July 31, respectively, of each
calendar year.

      Twice each year, on the first business day of each Payment Period, the
Company will grant to each eligible employee who is then a participant in the
Plan an option to purchase on the last day of such Payment Period, at the Option
Price hereinafter provided for, a maximum of 50 shares, on condition that such
employee remains eligible to participate in the Plan throughout the remainder of
such Payment Period. The participant shall be entitled to exercise the option so
granted only to the extent of the participant's accumulated payroll deductions
on the last day of such Payment Period. If the participant's accumulated payroll
deductions on the last day of the

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                                      -3-

Payment Period would enable the participant to purchase more than 50 shares
except for the 50-share limitation, the excess of the amount of the accumulated
payroll deductions over the aggregate purchase price of the 50 shares shall be
promptly refunded to the participant by the Company, without interest. The
Option Price per share for each Payment Period shall be the lesser of (i) 85% of
the average market price of the Common Stock on the first business day of the
Payment Period and (ii) 85% of the average market price of the Common Stock on
the last business day of the Payment Period, in either event rounded up to the
nearest cent. The foregoing limitation on the number of shares subject to option
and the Option Price shall be subject to adjustment as provided in Article 12.

      For purposes of the Plan, the term "average market price" on any date
means (i) the average (on that date) of the high and low prices of the Common
Stock on the principal national securities exchange on which the Common Stock is
traded, if the Common Stock is then traded on a national securities exchange; or
(ii) the last reported sale price (on that date) of the Common Stock on the
NASDAQ National Market, if the Common Stock is not then traded on a national
securities exchange; or (iii) the average of the closing bid and asked prices
last quoted (on that date) by an established quotation service for
over-the-counter securities, if the Common Stock is not reported on the NASDAQ
National Market; or (iv) if the Common Stock is not publicly traded, the fair
market value of the Common Stock as determined by the Committee after taking
into consideration all factors which it deems appropriate, including, without
limitation, recent sale and offer prices of the Common Stock in private
transactions negotiated at arm's length.

      For purposes of the Plan, the term "business day" means a day on which
there is trading on the NASDAQ National Market or the aforementioned national
securities exchange, whichever is applicable pursuant to the preceding
paragraph; and if neither is applicable, a day that is not a Saturday, Sunday or
legal holiday in Massachusetts.

      No employee shall be granted an option which permits the employee's right
to purchase stock under the Plan, and under all other Section 423(b) employee
stock purchase plans of the Company and any parent or subsidiary corporations,
to accrue at a rate which exceeds $25,000 of fair market value of such stock
(determined on the date or dates that options on such stock were granted) for
each calendar year in which such option is outstanding at any time. The purpose
of the limitation in the preceding sentence is to comply with Section 423(b)(8)
of the Code. If the participant's accumulated payroll deductions on the last day
of the Payment Period would otherwise enable the participant to purchase Common
Stock in excess of the Section 423(b)(8) limitation described in this paragraph,
the excess of the amount of the accumulated payroll deductions over the
aggregate purchase price of the shares actually purchased shall be promptly
refunded to the participant by the Company, without interest.

ARTICLE 6 - EXERCISE OF OPTION.

      Each eligible employee who continues to be a participant in the Plan on
the last day of a Payment Period shall be deemed to have exercised his or her
option on such date and shall be deemed to have purchased from the Company such
number of full shares of Common Stock reserved for the purpose of the Plan as
the participant's accumulated payroll deductions on such

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date will pay for at the Option Price, subject to the 50-share limit of the
option and the Section 423(b)(8) limitation described in Article 5. If the
individual is not a participant on the last day of a Payment Period, then he or
she shall not be entitled to exercise his or her option. Only full shares of
Common Stock may be purchased under the Plan. Unused payroll deductions
remaining in a participant's account at the end of a Payment Period by reason of
the inability to purchase a fractional share shall be carried forward to the
next Payment Period.

ARTICLE 7 - AUTHORIZATION FOR ENTERING THE PLAN.

      An employee may elect to enter the Plan by filling out, signing and
delivering to the Company an authorization:

          A. Stating the percentage to be deducted regularly from the employee's
     pay;

          B. Authorizing the purchase of stock for the employee in each Payment
     Period in accordance with the terms of the Plan; and

          C. Specifying the exact name or names in which stock purchased for the
     employee is to be issued as provided under Article 11 hereof.

Such authorization must be received by the Company at least ten days before the
first day of the next succeeding Payment Period and shall take effect only if
the employee is an eligible employee on the first business day of such Payment
Period.

      Unless a participant files a new authorization or withdraws from the Plan,
the deductions and purchases under the authorization the participant has on file
under the Plan will continue from one Payment Period to succeeding Payment
Periods as long as the Plan remains in effect.

      The Company will accumulate and hold for each participant's account the
amounts deducted from his or her pay. No interest will be paid on these amounts.

ARTICLE 8 - MAXIMUM AMOUNT OF PAYROLL DEDUCTIONS.

      An employee may authorize payroll deductions in an amount (expressed as a
whole percentage) not less than one percent (1%) but not more than ten percent
(10%) of the employee's total compensation, including base pay or salary and any
overtime, bonuses or commissions.

ARTICLE 9 - CHANGE IN PAYROLL DEDUCTIONS.

      Deductions may not be increased or decreased during a Payment Period.
However, a participant may withdraw in full from the Plan.

ARTICLE 10 - WITHDRAWAL FROM THE PLAN.

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      A participant may withdraw from the Plan (in whole but not in part) at any
time prior to the last day of a Payment Period by delivering a withdrawal notice
to the Company.

      To re-enter the Plan, an employee who has previously withdrawn must file a
new authorization at least ten days before the first day of the next Payment
Period in which he or she wishes to participate. The employee's re-entry into
the Plan becomes effective at the beginning of such Payment Period, provided
that he or she is an eligible employee on the first business day of the Payment
Period.

ARTICLE 11 - ISSUANCE OF STOCK.

      Certificates for stock issued to participants shall be delivered as soon
as practicable after each Payment Period by the Company's transfer agent.

      Stock purchased under the Plan shall be issued only in the name of the
participant, or if the participant's authorization so specifies, in the name of
the participant and another person of legal age as joint tenants with rights of
survivorship.

ARTICLE 12 - ADJUSTMENTS.

      Upon the happening of any of the following described events, a
participant's rights under options granted under the Plan shall be adjusted as
hereinafter provided:

            A. In the event that the shares of Common Stock shall be subdivided
      or combined into a greater or smaller number of shares or if, upon a
      reorganization, split-up, liquidation, recapitalization or the like of the
      Company, the shares of Common Stock shall be exchanged for other
      securities of the Company, each participant shall be entitled, subject to
      the conditions herein stated, to purchase such number of shares of Common
      Stock or amount of other securities of the Company as were exchangeable
      for the number of shares of Common Stock that such participant would have
      been entitled to purchase except for such action, and appropriate
      adjustments shall be made in the purchase price per share to reflect such
      subdivision, combination or exchange; and

            B. In the event the Company shall issue any of its shares as a stock
      dividend upon or with respect to the shares of stock of the class which
      shall at the time be subject to option hereunder, each participant upon
      exercising such an option shall be entitled to receive (for the purchase
      price paid upon such exercise) the shares as to which the participant is
      exercising his or her option and, in addition thereto (at no additional
      cost), such number of shares of the class or classes in which such stock
      dividend or dividends were declared or paid, and such amount of cash in
      lieu of fractional shares, as is equal to the number of shares thereof and
      the amount of cash in lieu of fractional shares, respectively, which the
      participant would have received if the participant had been the holder of
      the shares as to which the participant is exercising his or her option at
      all times between the date of the granting of such option and the date of
      its exercise.

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      Upon the happening of any of the foregoing events, the class and aggregate
number of shares set forth in Article 4 hereof which are subject to options
which have been or may be granted under the Plan and the limitations set forth
in the second paragraph of Article 5 shall also be appropriately adjusted to
reflect the events specified in paragraphs A and B above. Notwithstanding the
foregoing, any adjustments made pursuant to paragraphs A or B shall be made only
after the Committee, based on advice of counsel for the Company, determines
whether such adjustments would constitute a "modification" (as that term is
defined in Section 424 of the Code). If the Committee determines that such
adjustments would constitute a modification, it may refrain from making such
adjustments.

      If the Company is to be consolidated with or acquired by another entity in
a merger, a sale of all or substantially all of the Company's assets or
otherwise (an "Acquisition"), the Committee or the board of directors of any
entity assuming the obligations of the Company hereunder (the "Successor Board")
shall, with respect to options then outstanding under the Plan, either (i) make
appropriate provision for the continuation of such options by arranging for the
substitution on an equitable basis for the shares then subject to such options
either (a) the consideration payable with respect to the outstanding shares of
the Common Stock in connection with the Acquisition, (b) shares of stock of the
successor corporation, or a parent or subsidiary of such corporation, or (c)
such other securities as the Successor Board deems appropriate, the fair market
value of which shall not materially exceed the fair market value of the shares
of Common Stock subject to such options immediately preceding the Acquisition;
or (ii) terminate each participant's options in exchange for a cash payment
equal to the excess of (a) the fair market value on the date of the Acquisition,
of the number of shares of Common Stock that the participant's accumulated
payroll deductions as of the date of the Acquisition could purchase, at an
option price determined with reference only to the first business day of the
applicable Payment Period and subject to the 50-share, Code Section 423(b)(8)
and fractional-share limitations on the amount of stock a participant would be
entitled to purchase, over (b) the result of multiplying such number of shares
by such option price.

      The Committee or Successor Board shall determine the adjustments to be
made under this Article 12, and its determination shall be conclusive.

ARTICLE 13 - NO TRANSFER OR ASSIGNMENT OF EMPLOYEE'S RIGHTS.

      An option granted under the Plan may not be transferred or assigned and
may be exercised only by the participant.

ARTICLE 14 - TERMINATION OF EMPLOYEE'S RIGHTS.

      Whenever a participant ceases to be an eligible employee because of
retirement, voluntary or involuntary termination, resignation, layoff,
discharge, death or for any other reason, his or her rights under the Plan shall
immediately terminate, and the Company shall promptly refund, without interest,
the entire balance of his or her payroll deduction account under the Plan.
Notwithstanding the foregoing, eligible employment shall be treated as
continuing intact while a participant is on military leave, sick leave or other
bona fide leave of absence, for up to 90 days,

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or for so long as the participant's right to re-employment is guaranteed either
by statute or by contract, if longer than 90 days.

ARTICLE 15 - TERMINATION AND AMENDMENTS TO PLAN.

      Unless terminated sooner as provided below, the Plan shall terminate on
December 31, 2009. The Plan may be terminated at any time by the Company's Board
of Directors but such termination shall not affect options then outstanding
under the Plan. It will terminate in any case when all or substantially all of
the unissued shares of stock reserved for the purposes of the Plan have been
purchased. If at any time shares of stock reserved for the purpose of the Plan
remain available for purchase but not in sufficient number to satisfy all then
unfilled purchase requirements, the available shares shall be apportioned among
participants in proportion to the amount of payroll deductions accumulated on
behalf of each participant that would otherwise be used to purchase stock, and
the Plan shall terminate. Upon such termination or any other termination of the
Plan, all payroll deductions not used to purchase stock will be refunded,
without interest.

      The Committee or the Board of Directors may from time to time adopt
amendments to the Plan provided that, without the approval of the stockholders
of the Company, no amendment may (i) increase the number of shares that may be
issued under the Plan; (ii) change the class of employees eligible to receive
options under the Plan, if such action would be treated as the adoption of a new
plan for purposes of Section 423(b) of the Code; or (iii) cause Rule 16b-3 under
the Securities Exchange Act of 1934 to become inapplicable to the Plan.

ARTICLE 16 - LIMITS ON SALE OF STOCK PURCHASED UNDER THE PLAN.

      The Plan is intended to provide shares of Common Stock for investment and
not for resale. The Company does not, however, intend to restrict or influence
any employee in the conduct of his or her own affairs. An employee may,
therefore, sell stock purchased under the Plan at any time the employee chooses,
subject to compliance with any applicable federal or state securities laws and
subject to any restrictions imposed under Article 21 to ensure that tax
withholding obligations are satisfied. THE EMPLOYEE ASSUMES THE RISK OF ANY
MARKET FLUCTUATIONS IN THE PRICE OF THE STOCK.

ARTICLE 17 - PARTICIPATING SUBSIDIARIES.

      The term "participating subsidiary" shall mean any present or future
subsidiary of the Company, as that term is defined in Section 424(f) of the
Code, which is designated from time to time by the Board of Directors to
participate in the Plan. The Board of Directors shall have the power to make
such designation before or after the Plan is approved by the stockholders.

ARTICLE 18 - OPTIONEES NOT STOCKHOLDERS.

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      Neither the granting of an option to an employee nor the deductions from
his or her pay shall constitute such employee a stockholder of the shares
covered by an option until such shares have been actually purchased by the
employee.

ARTICLE 19 - APPLICATION OF FUNDS.

      The proceeds received by the Company from the sale of Common Stock
pursuant to options granted under the Plan will be used for general corporate
purposes.

ARTICLE 20 - NOTICE TO COMPANY OF DISQUALIFYING DISPOSITION.

      By electing to participate in the Plan, each participant agrees to notify
the Company in writing immediately after the participant transfers Common Stock
acquired under the Plan, if such transfer occurs within two years after the
first business day of the Payment Period in which such Common Stock was
acquired. Each participant further agrees to provide any information about such
a transfer as may be requested by the Company or any subsidiary corporation in
order to assist it in complying with the tax laws. Such dispositions generally
are treated as "disqualifying dispositions" under Sections 421 and 424 of the
Code, which have certain tax consequences to participants and to the Company and
its participating subsidiaries.

ARTICLE 21 - WITHHOLDING OF ADDITIONAL INCOME TAXES.

      By electing to participate in the Plan, each participant acknowledges that
the Company and its participating subsidiaries are required to withhold taxes
with respect to the amounts deducted from the participant's compensation and
accumulated for the benefit of the participant under the Plan, and each
participant agrees that the Company and its participating subsidiaries may
deduct additional amounts from the participant's compensation, when amounts are
added to the participant's account, used to purchase Common Stock or refunded,
in order to satisfy such withholding obligations. Each participant further
acknowledges that when Common Stock is purchased under the Plan the Company and
its participating subsidiaries may be required to withhold taxes with respect to
all or a portion of the difference between the fair market value of the Common
Stock purchased and its purchase price, and each participant agrees that such
taxes may be withheld from compensation otherwise payable to such participant.
It is intended that tax withholding will be accomplished in such a manner that
the full amount of payroll deductions elected by the participant under Article 7
will be used to purchase Common Stock. However, if amounts sufficient to satisfy
applicable tax withholding obligations have not been withheld from compensation
otherwise payable to any participant, then, notwithstanding any other provision
of the Plan, the Company may withhold such taxes from the participant's
accumulated payroll deductions and apply the net amount to the purchase of
Common Stock, unless the participant pays to the Company, prior to the exercise
date, an amount sufficient to satisfy such withholding obligations. Each
participant further acknowledges that the Company and its participating
subsidiaries may be required to withhold taxes in connection with the
disposition of stock acquired under the Plan and agrees that the Company or any
participating subsidiary may take whatever action it considers appropriate to
satisfy such withholding requirements, including deducting from compensation
otherwise payable to such participant an amount sufficient to

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satisfy such withholding requirements or conditioning any disposition of Common
Stock by the participant upon the payment to the Company or such subsidiary of
an amount sufficient to satisfy such withholding requirements.

ARTICLE 22 - GOVERNMENTAL REGULATIONS.

      The Company's obligation to sell and deliver shares of Common Stock under
the Plan is subject to the approval of any governmental authority required in
connection with the authorization, issuance or sale of such shares.

      Government regulations may impose reporting or other obligations on the
Company with respect to the Plan. For example, the Company may be required to
identify shares of Common Stock issued under the Plan on its stock ownership
records and send tax information statements to employees and former employees
who transfer title to such shares.

ARTICLE 23 - GOVERNING LAW.

      The validity and construction of the Plan shall be governed by the laws of
the State of Delaware, without giving effect to the principles of conflicts of
law thereof.

ARTICLE 24 - APPROVAL OF BOARD OF DIRECTORS AND STOCKHOLDERS OF THE COMPANY.

      The Plan was adopted by the Board of Directors on August 1, 2000 and was
approved by the stockholders of the Company on August 1, 2000.<PAGE>   1
                                                                    EXHIBIT 10.4

                                    L E A S E

         This Lease entered into on September 15, 1995 by and between Lessor (as
defined in Article 1, together with its successors and assigns) and Lessee (as
defined in Article 1, together with its successors and permitted assigns).

                                    ARTICLE 1
                        Basic Information and Definitions

         Section 1.1. For the purposes of this lease, the following terms shall
have the meanings set forth below, unless the context otherwise requires:

"Lessor":                           211 Second Avenue Realty L.P.
                                    c/o Walcott Corporation

"Lessor's Address":                 1050 Commonwealth Avenue
                                    Boston, MA 02215

"Lessee":                           Evergreen Solar Inc., A Delaware corporation

"Lessee's Address":                 49 Jones Road
                                    Waltham, MA 02154

"Lessee's Trade Name":              Evergreen Solar

"Leased Premises":                  Approximately 9,400 square feet of space on
                                    the first floor of the Building (as defined
                                    in Section 1.2), which Building is located
                                    at 211 Second Avenue, Waltham, MA; the
                                    Leased Premises are located substantially as
                                    outlined on the plan attached hereto as
                                    Exhibit A.

"Commencement Date":                October 1, 1995.

"Term":                             Three (3) years.

"Annual Base Rent":                 $70,500.00 per year; payable in installments
                                    of $5,875.00 per month.

"Permitted Uses":                   General office and pilot plant for
                                    manufacture of solar panels and materials
                                    related thereto.

"Security Deposit":                 $5,875.00.

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"Insurance Amounts":                $1,000,000.00, for injury to persons.
                                    $500,000.00, for damage to property.

"Leased Premises Rentable Area":    9,400 square feet.

"Building Rentable Area":           19,200 square feet
                                    (subject to increase or decrease as provided
                                    in Section 2.5).

"Broker":                           Charles Detwiller, Neelon Co., Michael
                                    Giles, Hunneman and Paul Simard, Codman Co.

         Section 1.2. For the purposes of this lease, the following terms shall
have the meanings set forth below, unless the context otherwise requires:

         "Alterations" shall mean any and all alterations, installations,
improvements, additions or other physical changes in or about the Leased
Premises, whether interior, exterior, structural, nonstructural or otherwise.

         "Applicable Law" shall mean, with respect to any matter referred to
herein, all laws applicable with respect thereto, including, without limitation,
all applicable constitutional provisions, statutes, ordinances, codes, by-laws,
regulations, rulings, decisions, rules, orders, determinations and requirements
of any Federal, state, county, local or other legislative, executive, judicial
or other governmental body or authority.

         "Approvals" shall mean all approvals of any nature, including, without
limitation, all permits, licenses, orders, variances, and the like.

         "Building" shall mean the building in which the Leased Premises are
located.

         "Common Facilities" shall mean all portions of the Building and the
Land designated as such from time to time by the Lessor, which are reasonably
necessary for access to and the use and employment of the Leased Premises,
except the interior of the Leased Premises and of other rentable portions of the
Building; the Common Facilities may include: common toilets, common walkways,
exterior spaces, loading docks, entranceways, hallways, stairways, elevators and
lobbies. Except as expressly provided in this lease, Lessor reserves and shall
have the unrestricted right from time to time to change the location or size or
character of any of the Common Facilities on the Land or in the Building.

         "Default Interest Rate" shall mean an interest rate equal to the
greater of (i) 1 1/2% per month or (ii) 5% per year above the base lending rate
(prime rate) announced from time to time by The First National Bank of Boston,
but in no event shall the Default Interest Rate be greater than that permitted
by Applicable Law.

<PAGE>   3
         "Land" shall mean the parcel of land on which the Building is located.

         "Lease Year" shall mean each successive twelve-month period included in
whole or in part in the Term of this lease; the first Lease Year beginning on
the Commencement Date and ending at midnight on the day before the first
anniversary of the Commencement Date (provided that if the Commencement Date is
not the first day of a calendar month, the first Lease Year shall end at
midnight on the last day of the calendar month which includes the first
anniversary of the Commencement Date).

         "Lessee's Agents" shall mean: Lessee's subtenants, licensees and
concessionaires; the employees, agents, contractors, subcontractors, suppliers,
transporters, licensees, invitees, guests or customers of Lessee or of Lessee's
subtenants, licensees or concessionaires; and anyone else claiming by, through
or under Lessee.

         "Lessee's Share" shall mean the amount of a respective item multiplied
by a fraction, the numerator of which shall be the Leased Premises Rentable Area
and the denominator of which shall be the Building Rentable Area multiplied by
the greater of (i) 95% or (ii) the percentage of the Building Rentable Area
actually occupied by tenants.

         "Mortgage" shall mean any real estate mortgage, ground lease, deed of
trust or any other security agreement or indenture affecting the Leased
Premises, Building or Property.

         "Mortgagee" shall mean the holder of any Mortgage.

         "Property" shall mean the Land and the Building and another building
and improvements on the Land.

         "Unavoidable Delays" shall mean delays caused by strikes, lockouts,
labor difficulties, inability to obtain labor or materials, government
restrictions, sabotage, riots, civil commotion, enemy action, explosions, fire,
unavoidable casualty, accidents, acts of God or similar causes beyond the
reasonable control of Lessor.

                                    ARTICLE 2
                               Agreement to Lease

         Section 2.1. In consideration of the rents and covenants contained
herein to be paid, performed and observed by Lessee, the Lessor hereby leases to
the Lessee and the Lessee hereby leases from the Lessor, subject to the terms
and provisions hereinafter set forth, the Leased Premises.

         Section 2.2. There shall be excepted and excluded from the Leased
Premises the ceiling, floor, perimeter walls and exterior walls and windows
(except the interior surfaces thereof), and any space in the Leased Premises
used for pipes, ducts, wires, meters, vents, flues, conduits,

<PAGE>   4
utility lines, fan rooms, shafts, stacks, utility closets, janitor closets,
stairways and elevator wells and not serving the Leased Premises exclusively.

         Section 2.3. The Leased Premises are leased together with the
non-exclusive right to use, in common with others lawfully entitled thereto and
in connection with business in the Building, the Common Facilities, but only for
the purposes for which such Common Facilities (and portions thereof) shall have
been designated by Lessor; however, such rights shall always be subject to
reasonable rules and regulations from time to time established by Lessor and to
the right of Lessor to designate and change from time to time the Common
Facilities.

         Section 2.4. The Leased Premises are leased subject to existing
encumbrances of record, if any. The Leased Premises are also leased subject to
the reservation to the Lessor of the roof and exterior walls of the Leased
Premises and the Building; and the Lessor reserves the right (without thereby
assuming the obligation) to install, maintain, use, repair, replace and
relocate, within or without the Leased Premises, pipes, ducts, wires, meters,
vents, flues, conduits, utility lines and other equipment which now are, or
hereafter may be, in the judgment of the Lessor, required to be in the Leased
Premises or the Building to service the Leased Premises or other parts of the
Building, provided such actions do not materially reduce the size of the Leased
Premises or materially interfere with the Lessee's use and enjoyment of the
Leased Premises.

         Section 2.5. The Lessor reserves the right: to change the size, type
and shape of any and all buildings on the Land; to alter, reduce, increase and
relocate all parking areas, driveways and walkways, from time to time; and to
make additions to the Building and erect additional buildings and structures on
the Land. Should Lessor make additions to the Building or reconfigure the
Building, the Building Rentable Area shall be appropriately increased or
decreased by Lessor.

         Section 2.6. It is understood by Lessee that the Leased Premises
Rentable Area has been determined by including in such computation certain
Common Facilities (or a proportionate share of certain Common Facilities),
notwithstanding their exclusion from the Leased Premises.

                                    ARTICLE 3
                              Term and Commencement

         Section 3.1. To have and to hold the Leased Premises for the Term (also
referred to as the "original Term") beginning on the Commencement Date and
expiring at midnight on the last day of the Term, unless sooner terminated as
hereinafter provided.

                                    ARTICLE 4
                                    Base Rent

         Section 4.1. Yielding and paying a base rent during each Lease Year of
the original Term hereof in the annual amount of the Annual Base Rent.

<PAGE>   5
         Section 4.2. All base rent shall be payable in advance in equal monthly
installments due on the first day of each calendar month during the Term hereof,
without offset or deduction and without previous demand therefor; provided,
however, base rent for the first full calendar month of the Term (or if the
Commencement Date is other than the first day of a calendar month, base rent for
the portion of such month contained within the Term hereof together with base
rent for the first full calendar month) shall be paid simultaneously with the
execution and delivery of this lease; and provided if the Termination Date (as
it may be extended) is other than the last day of a calendar month, base rent
for the portion of such month contained within the Term together with base rent
for the last full calendar month shall be due and payable on or prior to the
first day of the last full calendar month of the Term. Base rent for any partial
calendar month at the commencement or expiration of the Term hereof shall be
pro-rated on a per diem basis at the base rent applicable to such month(s). If
the first Lease Year is longer than one year, base rent for such Lease Year
shall be increased proportionately to the greater length of such Lease Year.

         Section 4.3. All payments of base rent, additional rent or other
amounts due under any provision of this lease shall be made payable to the
Lessor and made at Lessor's Address or such other payee and/or address as Lessor
may designate in writing from time to time.

         Section 4.4. All amounts payable by Lessee to Lessor hereunder,
including base rent, additional rent and all other payments and charges, shall
be deemed rent hereunder, and all provisions governing the payment of rent, and
all remedies applicable to the nonpayment of rent shall be applicable thereto.

         Section 4.5. Notwithstanding the fact that the amounts of base rent set
forth in this Article 4 were or may have been determined with reference to the
floor area of the Leased Premises, said amounts set forth above are stipulated
to be the amounts of base rent due hereunder, whether or not the actual floor
area of the Leased Premises is in fact actually more or less than the floor area
figures used to determine said base rent.

                                    ARTICLE 5
                                 Additional Rent

         Section 5.1. Taxes.

         (a)      The Lessee shall pay to Lessor, as additional rent hereunder,
during the Term and any extension thereof: (i) Lessee's Share of the Taxes (as
defined in subsection (c) below) less any amounts paid pursuant to (ii); and
(ii) 100% of any portion of the Taxes attributable to any Alterations made by
the Lessee. Such additional rent for any partial Tax Year at the commencement or
expiration of the Term shall be pro-rated on a per diem basis.

         b)       The Lessee shall pay such additional rent to the Lessor within
10 days of billing therefor. At Lessor's request, Lessee shall pay such
additional rent to Lessor in advance in monthly estimated installments, which
installments shall be due and payable on the same dates as

<PAGE>   6
the base rent payable hereunder, and shall be in such amounts as reasonably
calculated by Lessor to pay said Taxes at least 30 days prior to their due
dates. Lessor may adjust such estimated installment amounts (both prospectively
and retrospectively) from time to time based upon Lessor's reasonable estimates
of same. After the end of each Tax Year (as defined in subsection (c) below)
during the Term, Lessor shall furnish to Lessee a statement setting forth the
Taxes together with a copy of the most recent bill therefore; thereupon there
shall be a prompt adjustment between Lessor and Lessee, and Lessee shall pay any
deficiency within 10 days of being billed therefor, and any overpayment shall be
credited to Lessee's then current rent obligations hereunder, or, in the case of
the end of the Term, shall be refunded to Lessee.

         (c)      The following terms as used herein shall have the meanings set
forth below:

         "Tax Year" shall mean the period commencing on July 1 of a year and
ending on June 30 of the following year.

         "Taxes" shall mean all taxes and assessments of every kind and nature
imposed, assessed or levied by a governmental authority on the Property,
including without limitation all real estate taxes, betterments, assessments
(ordinary and extraordinary), water rents, sewer, and other charges. If taxes
upon rentals or otherwise pertaining to the Property shall be substituted, in
whole or in part, for the present ad valorem real estate taxes, or shall be
assessed in addition thereto, then the term "Taxes" shall include such
substituted taxes, to the extent to which the same shall be a substitute for
present ad valorem real estate taxes, together with any such additional taxes.
Except as hereinabove provided, nothing herein contained shall otherwise require
or be construed to require Lessee to reimburse Lessor for any inheritance,
estate, succession, transfer, gift, franchise, income or earnings, profit,
excess profit tax, capital stock, capital levy or corporate or other similar tax
which is or may be imposed upon Lessor or upon Lessor's business.

         Section 5.2.  Operating Costs.

         (a)      The Lessee shall pay to Lessor, as additional rent hereunder,
during the Term and any extensions thereof: (i) Lessee's Share of the Operating
Costs (as defined in subsection (c) below) less any amounts paid pursuant to
(ii); and (ii) 100% of any Operating Costs which are incurred by Lessor and
either caused by any act or negligence by the Lessee or Lessee's Agents, are
performed as special services exclusively for Lessee or are otherwise directly
allocable to the Leased Premises. Such additional rent for any partial Operating
Year at the commencement or expiration of the Term shall be pro-rated on a per
diem basis.

         (b)      The Lessee shall pay such additional rent to Lessor within 10
days of billing therefor. At Lessor's request, Lessee shall pay such additional
rent to Lessor in advance in monthly estimated installments, which installments
shall be due and payable on the same dates as the base rent hereunder, and shall
be in such amounts as reasonably calculated by Lessor to pay the annual
Operating Costs. Lessor may adjust such installment amounts (both prospectively
and retrospectively) from time to time based upon Lessor's reasonable estimates
of same. After the end of each Operating Year (as defined in subsection (c)
below) during the Term, Lessor shall

<PAGE>   7
furnish to Lessee a statement together with documentation in reasonable detail
setting forth the operating Costs; thereupon there shall be a prompt adjustment
between Lessor and Lessee, and Lessee shall pay any deficiency within 10 days of
being billed therefor, and any overpayment shall be credited to Lessee's then
current rent obligations hereunder, or, in the case of the end of the Term,
shall be refunded to Lessee.

         (c)      The following terms as used herein shall have the meanings set
forth below:

         "Operating Year" shall mean the calendar year, or such other one-year
period as Lessor shall designate from time to time.

         "Operating Costs" shall mean (regardless of the actual percentage of
occupancy of the Building) the Unadjusted Operating Costs (as defined below)
extrapolated as though 100% of the Building Rentable Area were occupied.

         "Unadjusting Operating Costs" shall mean the total costs and expenses
incurred by Lessor, its agents, and/or designees in connection with the
operation, maintenance, cleaning, repair, replacement, management and protection
(the "Operation") of all or any part of the Property, and any installations
therein, thereon, thereunder or thereover, which costs and expenses shall
include, but shall not be limited to, the following:

         (1)      Costs of services, materials, supplies, tools, and equipment
                  furnished or used in the operation of the Property.

         (2)      Costs relating to the employment of personnel in connection
                  with the Operation of the Property, including wages and
                  salaries, employee benefits (including all fringe benefits)
                  workmen's compensation insurance, unemployment insurance,
                  insurance premiums and social security payments.

         (3)      Amounts paid to independent contractors for services,
                  materials and supplies furnished in connection with the
                  Operation of the Property; and amounts paid to managing agents
                  and for legal, accounting or other professional fees relating
                  to the Operation of the Property.

         (4)      Costs of and charges for all electrical, water, sewer, gas,
                  oil, telephone, alarm or other utility service to the Common
                  Facilities, and for such service to the Leased Premises or to
                  any rentable portions of the Building, including all costs as
                  provided in Article 10 hereof.

         (5)      Costs relating to the Operation of heating, ventilating, air
                  conditioning, sprinkler and elevator systems, and water lines,
                  electrical lines, gas lines, sanitary sewer lines and storm
                  water lines located on the Leased Premises, Building or Land.

         (6)      Costs in connection with the operation of the exterior
                  portions of the Property, including: landscaping (including
                  planting and replanting); parking (including

<PAGE>   8
                  repaving and restriping); the exterior and roof of the
                  Building; signs and lighting; trash, rubbish, garbage and
                  other refuse; and snow and ice removal.

         (7)      Costs of all the premiums for all insurance carried by Lessor
                  on the Property (including without limitation insurance on the
                  Building, the Common Facilities and the Land), including all
                  costs as provided in Article 11 hereof. Such insurance shall
                  include, without limitation, any of the following insurance
                  carried by Lessor: fire, extended coverage and all risk
                  insurance, flood insurance, rental value insurance, bodily
                  injury, public liability, and property damage liability
                  insurance, automobile parking lot liability insurance, sign
                  insurance, sprinkler insurance, boiler insurance and workmen's
                  compensation insurance; all with limits and on such forms and
                  with such companies and against such risks as may be
                  reasonably determined by Lessor or as may be required by the
                  holder of any Mortgage on all or any portion of the Property.

         (8)      Personal property, sales and use taxes on material, equipment,
                  supplies and services; the costs of all permits and licenses;
                  and fees for fire, security and police protection.

         (9)      All other expenses (whether or not similar in type to the
                  costs specifically enumerated above) incurred in connection
                  with the Operation of the Common Facilities.

         (10)     In addition, there shall be included a charge equal to 15% of
                  all such costs and expenses incurred by Lessor to cover
                  Lessor's administrative overhead.

         (d)      Unadjusted Operating Costs shall not include the following:

         (1)      Any costs, fines or penalties incurred due to any violation by
                  Lessor of any governmental rule or authority.

         (2)      Cost of renovating of otherwise improving space for other
                  Building occupants.

         (3)      Cost of expanding the Building Rentable Area.

         (e)      The Lessee's Share of Operating Costs, excluding insurance,
shall not exceed $10,000 for any Operating Year.

         Section 5.3.  Other Additional Rent.

         (a)      Lessor may assess, and Lessee shall pay, as additional rent,
reasonable additional charges for directory listing, building passes, security
cards, additional keys and other similar incidental items. Such additional rent
shall be paid within 10 days of being billed therefor, or, if

<PAGE>   9

such incidental charges are ongoing, such additional rent shall be paid in
monthly installments due and payable on the dates as the base rent hereunder,
and shall be subject to reasonable adjustment by Lessor from time to time.

         (b) This is, and is intended to be, a NET LEASE, and accordingly,
except as expressly otherwise provided for herein, all costs and expenses paid
or incurred by Lessor of any kind or nature whatsoever in maintaining and/or
repairing the Leased Premises or the Building or the Land or any additions to
the Building, or any other buildings or structures on the Land (other than costs
of maintaining or repairing the interior of space leased to others or available
for lease to others) shall be included in determining the costs of which Lessee
is obligated to pay a proportionate share as provided herein.

                                    ARTICLE 6
                        Condition of the Leased Premises

         Section 6.1. The Lessee accepts the Leased Premises in their present
condition, without representation or warranty, express or implied, in fact or in
law, by Lessor and without recourse to Lessor as to the nature, condition or
usability thereof and agrees that Lessor has no work to perform in or on the
Leased Premises; and Lessee agrees further that any and all work to be done in
or on the Leased Premises will be at Lessee's sole cost and expense.

                                    ARTICLE 7
                                    Covenants

         Section 7.1. Lessee covenants and agrees with Lessor as follows:

         (a)      To pay when due all base rent, all additional rent and all
         other amounts due under this lease from Lessee at the times and in the
         manner set forth herein, without offset or deduction and without
         previous demand therefor.

         (b)      To procure any Approvals required for any use to be made of
         the Leased Premises by Lessee.

         (c)      To pay promptly when due the entire cost of any work
         (including all Alterations) to the Leased Premises undertaken by Lessee
         so that the Leased Premises shall at all times be free of liens for
         labor and materials; to procure all necessary Approvals before
         undertaking such work; to do all of such work in a good and workmanlike
         manner, employing materials of good quality and complying with all
         Applicable Law; to obtain insurance (including builder's risk
         insurance) as required by Lessor to protect Lessor as well as Lessee in
         connection with such work; and to save Lessor harmless and indemnified
         from all injury, loss, claims or damage to any person or property
         occasioned by or growing out of such work including, without
         limitation, reasonable attorneys' fees. Upon receipt of notice from
         Lessor, Lessee shall take over Lessor's defense in any action related
         to work undertaken by Lessee on the Leased Premises.

<PAGE>   10

         (d)      To permit Lessor and its agents to examine the Leased Premises
         at reasonable times and to show the Leased Premises to prospective
         purchasers or tenants; and to permit Lessor to enter the Leased
         Premises to make such repairs, improvements, alterations or additions
         thereto or to the Building as may be required in order to comply with
         Applicable Law, or as may be required or permitted of Lessor under the
         terms of this lease.

         (e)      To pay when due any and all Federal, State, or local taxes
         based upon Lessee's use or occupation of the Leased Premises or
         pertaining to Lessee's personal property or resulting from any
         alteration, additions or improvements made by Lessee to the Leased
         Premises.

         (f)      To comply with Applicable Law pertaining to the Leased
         Premises or Lessee's use and occupation of the Leased Premises.

         (g)      To refrain from doing anything, taking any action or failing
         to act in such a manner that will cause any increase in the fire
         insurance rates pertaining to the Leased Premises or the Building and
         to comply with any rules, regulations or recommendations of the
         National Board of Fire Underwriters, any rating bureau, or any similar
         association performing such function; and failing same, without
         limiting other remedies of Lessor, Lessee shall pay to Lessor, as
         additional rent hereunder, the entire amount of any increase in
         insurance premiums resulting therefrom, such additional rent to be paid
         to Lessor within 10 days after the receipt of invoices from Lessor
         therefor.

         (h)      To permit no waste with respect to the Leased Premises.

         (i)      To provide Lessor with annual certified financial statements
         of Lessee within 90 days after the close of Lessee's fiscal year and
         with annual certified financial statements of any guarantor of Lessee's
         obligations within 90 days after the close of such guarantor's fiscal
         year.

                                    ARTICLE 8
                             Use of Leased Premises

         Section 8.1. The Lessee shall have the right to use the Leased Premises
only for the Permitted Uses, and for no other purposes whatsoever, but in no
event shall Lessee conduct at the Leased Premises any business use which is
offensive, constitutes a nuisance or violates any provisions of any zoning or
building laws or any other Applicable Law.

         Section 8.2. Without limiting any other obligations of Lessee
hereunder, prior to any use by Lessee of the Leased Premises, Lessee shall
obtain a valid, unconditional and permanent Certificate of Occupancy for the
Leased Premises from the city or town in which the Property is located. Lessee
shall promptly provide Lessor with a copy of same.

<PAGE>   11
         Section 8.3. Lessee further agrees to conform to each of the following
provisions during the entire Term of this lease or any extension thereof:

         (a)      Lessee shall always conduct its operations in the Leased
         Premises under Lessee's Trade Name, unless Lessor shall otherwise
         consent in writing.

         (b)      Lessee shall not permit any auction, fire,
         going-out-of-business or bankruptcy sales to be conducted within the
         Leased Premises without the prior written consent of the Lessor.

         (c)      Lessee shall not use the sidewalks or any other exterior space
         on the Property for advertising or business purposes without the prior
         written consent of the Lessor.

         (d)      Lessee shall, at its own cost and expense, insure that all
         trash, refuse and the like is kept at all times in covered containers
         in the Leased Premises or in such places as Lessor may designate from
         time to time.

         (e)      Lessee shall take whatever measures are necessary to insure
         that floor load limitations are not exceeded in the Leased Premises.

         (f)      Lessee shall keep the windows of the Leased Premises clean and
         free of signs.

         (g)      Lessee shall receive and deliver goods and merchandise only in
         the manner, at such times, and in such areas, as may be designated by
         Lessor and shall not in any event receive or deliver goods and
         merchandise through the front door of the Building.

         (h)      Lessee shall not use the Leased Premises for any unethical or
         unfair method of business operation, advertising or interior display,
         nor perform any act or carry on any practice which may injure the
         Leased Premises or any other part of the Building or the Property, nor
         cause any offensive odors or loud noise (including, but without
         limitation, the use of loudspeakers), nor constitute a nuisance or
         menace to any other occupant of the Building or the Property, and in no
         event shall any noises or odors be emitted from the Leased Premises.

         (i)      Lessee shall not vacate or abandon the Leased Premises.

         (j)      Lessee shall comply with such reasonable rules and regulations
         as Lessor has promulgated or may promulgate during the term hereof of
         any extension thereof.

         (k)      Lessee shall not install any equipment in the Leased Premises
         which could cause the electrical service to the leased Premises or the
         Building to be overloaded.

         (1)      Lessee shall keep the Common Facilities free of any and all of
         Lessee's equipment, refuse or property.

<PAGE>   12

         (m)      If so requested by Lessor, Lessee will park its vehicles and
         will cause Lessee's Agents to park their vehicles only in such areas as
         shall from time to time be designated by Lessor as "employee parking
         areas." Lessee will, on request, furnish Lessor with automobile license
         numbers assigned to automobiles belonging to or used by Lessee or such
         other persons. Lessee will cause to be affixed to such vehicles
         employee identification stickers which Lessor may furnish. Lessor shall
         have the right to have any such vehicle towed away at Lessee's expense
         if parked in violation of this subsection, or otherwise in violation of
         the provisions of this lease. Lessor will provide Lessee with access to
         twenty-five (25) undesignated parking spaces for its employees, agents,
         and visitors, the location of which may change from time to time.

         Section 8.4. Lessee shall have access to the Leased Premises at all
times, subject to such reasonable security restrictions as may from time to time
be in effect, and to restrictions based on emergency conditions.

                                    ARTICLE 9
                      Maintenance, Alterations and Removal

         Section 9.1.   Maintenance.

         (a)      Except only for maintenance and repairs to be performed or
made by Lessor as expressly provided in subsections (b) and (c) below, and
ordinary wear and tear (provided good maintenance practices are employed, but
this exception shall not excuse Lessee from any obligation hereunder to make
necessary repairs or replacements), the Lessee shall keep and maintain the
Leased Premises in a neat, clean and sanitary condition and in at least as good
order, repair, and condition as same are now in or in such better condition as
they are placed in during the term hereof (and shall make any necessary
replacements), including without limitation the maintenance and repair of: any
improvements constructed or installed by Lessee; all electrical, plumbing, gas,
HVAC and sewage facilities exclusively serving the Leased Premises; interior
walls, floors, and ceilings; sprinklers, fixtures, signs (if and where
permitted) and all interior building appliances and similar equipment; and the
exterior and interior portions of all windows, window frames, doors, door
frames, and all other glass or plateglass thereon. Lessee shall be responsible
for the cost of repairs to the Building (including the Common Facilities and the
Leased Premises) and the Property caused by any act or negligence of Lessee or
Lessee's Agents, including damage to the roof, foundations and exterior walls of
the Building and Leased Premises or to the utilities servicing the Building and
the Leased Premises; and if such repairs are required, Lessor may demand that
Lessee make the same forthwith, at its sole cost or expense, or Lessor may cause
such repairs to be made and the cost of same shall be paid by Lessee, as
additional rent, promptly upon demand therefor.

         (b)      The Lessor shall, promptly after receipt of written notice
from the Lessee, make any necessary repairs to the roof, foundations and
exterior walls of the Leased Premises and the Building and the common utility
systems of the Building; provided Lessor shall not be

<PAGE>   13
responsible for (i) the repair of glass and doorways (except for exterior doors
or windows), (ii) any improvements constructed or installed by Lessee or (iii)
repairs required by reason of any act or negligence by the Lessee or Lessee's
Agents.

         (c)      Lessor shall maintain the Common Facilities in at least as
good order and repair as same are now in, except for repairs and maintenance
made necessary by any act or negligence or default of Lessee or Lessee's Agents,
in which case such repairs and maintenance (and/or replacement) shall be made by
Lessee at its sole cost and expense. The Common Facilities shall be subject to
the exclusive control and management of the Lessor who shall have the right,
without limitation, and in addition to the previous provisions hereof: to police
the same; to change the area, level, location and arrangement of Common
Facilities; to close all or any portion of said areas or facilities to such
extent as may be legally sufficient to prevent a dedication thereof or the
accrual of any right to any person or the public therein; and to close
temporarily all or any portion of the parking areas (if any) to discourage
noncustomer parking and for the reasonable stockpiling of snow. The Lessor shall
operate the Common Facilities in such manner as the Lessor in its reasonable
discretion shall determine.

         (d)      Except as specifically provided in subsections (b) and (c)
above, Lessor shall not be responsible for any maintenance or repairs to the
Leased Premises, the Building or the Property. All costs incurred by Lessor in
performing its obligations under this Section 9.1 shall be included as a part of
the Operating Costs, as provided in Article 5 hereof, except if such repairs are
due to the negligence or willful misconduct of Lessor, its agents, or employees.

         (e)      If in any Lease Year the amount paid by Lessee for repairs and
replacements of the HVAC system of the Leased Premises exceeds $10,000, Lessor
shall pay to Lessee, within ten (10) days after Lessee's written request and
presentation of reasonable documentation of such costs and payment thereof, an
amount equal to 50% of such excess; and the amount so paid by Lessor shall not
be included as a part of the Operating Costs.

         Section 9.2.  Alterations.

         (a)      The Lessee shall not make any Alterations (as defined in
Section 1.2) without on each occasion obtaining Lessor's prior written consent
thereto, which consent shall not be unreasonably withheld, delayed or
conditioned as to non-structural Alterations.

         (b)      Lessee shall provide Lessor with plans, specifications and
other documents as may be reasonably required by Lessor in connection with the
consideration of such consent; and all reasonable costs (including reasonable
attorneys' fees) incurred by Lessor in connection with the consideration of
such consent shall be borne by Lessee and shall promptly be paid by Lessee to
Lessor.

         (c)      If Lessor consents in writing to such Alterations, such work
shall be performed in accordance with the terms and conditions of such consent,
with all Applicable Law (including the obtaining of all Approvals) and with the
provisions of Section 7.1(c) hereof. In no event shall such Alterations, or the
work in connection therewith, impair the safety of the structure of the

<PAGE>   14
Building nor diminish the value of the Building or the Leased Premises as then
constituted. At any time while any construction work is being performed upon the
Leased Premises, Lessee shall maintain workmen's compensation, public liability
and contractor's liability insurance in the statutory amounts (for workmen's
compensation) or in the amounts reasonably required by Lessor (for other
insurance); and Lessor, and any other parties designated by Lessor, shall be
named additional insureds on such policies. After any Alterations are completed,
Lessee shall cause all required inspections of the Leased Premises to be made
and shall deliver to Lessor a copy of a Certificate of Occupancy or similar
document evidencing completion of the Alterations and compliance with all
Applicable Law.

         Section 9.3.  Removal.

         (a)      The Lessee shall at the expiration or earlier termination of
this lease remove its goods and effects and peaceably yield up the Leased
Premises and the Building, clean and in substantially the same order, repair and
condition as when the Leased Premises were delivered or in such better condition
as they are placed in during the term hereof, ordinary wear and tear excepted
(but this exception shall apply only if Lessee has employed good maintenance
practices, but this exception shall not excuse Lessee from any obligation
hereunder to make necessary repairs and replacements), and except for repairs
which the Lessor agrees to make as herein provided, and Lessee shall repair any
injury done to the Leased Premises or the Building by the installation or
removal of the Lessee's fixtures or other property.

         (b)      All Alterations, or other additions, improvements and fixtures
which may be made or installed by either the Lessor or the Lessee and which are
attached to a floor, wall or ceiling, including any wall or floor coverings,
shall remain upon the Leased Premises, and at the expiration or earlier
termination of this lease shall be surrendered with the Leased Premises as a
part thereof; however, the Lessor upon termination of this lease, may require
the Lessee to restore the Leased Premises to their condition at the commencement
of this lease, in whole or in part.

         (c)      Notwithstanding subsection (b) above, any trade fixtures,
furniture, movable equipment and other personal property installed by the Lessee
and owned by the Lessee which may be removed from the Leased Premises without
injury thereto shall remain the property of the Lessee and shall be removed by
the Lessee from the Leased Premises prior to the expiration or earlier
termination of this lease; provided, if the Leased Premises or the Building is
damaged by or as a result of the removal of any such articles, Lessee shall
promptly repair such damage, at Lessee's sole cost and expense. In the event
Lessee fails to remove said articles prior to the expiration or earlier
termination of this lease (unless as directed by Lessor pursuant to the
preceding sentence) they shall be deemed abandoned and may be disposed of by
Lessor in any way Lessor sees fit, at Lessee's sole cost and expense.

<PAGE>   15

                                   ARTICLE 10
                                Utility Services

         Section 10.1. The Lessee shall obtain directly from the supplier
or utility company all utility services provided to the Leased Premises which
are now or are hereafter separately metered and served by such supplier or
utility company, or which are not now provided to the Leased Premises by the
Lessor, and Lessor shall have no responsibility in connection therewith.

         Section 10.2. The Lessor shall provide: (i) on business days, during
hours established by Lessor from time to time, reasonable heating, ventilating
and air-conditioning ("HVAC") services to the Leased Premises and the Common
Facilities; (ii) hot water for lavatory purposes and cold water (at temperatures
supplied by the city in which the Property is located) for normal drinking,
lavatory and toilet purposes; and (iii) to the extent not now or hereinafter
separately metered and billed directly by the applicable supplier to Lessee,
electrical service for normal office use.

         Section 10.3. Lessor shall provide HVAC services at times in addition
to those provided in Subsection 10.2 above, at Lessee's expense, provided Lessee
gives Lessor notice prior to noon of any business day for evening services, and
prior to noon of the day prior to any non-business day for services on
non-business days. Lessor shall charge Lessee for such after-hours HVAC services
based upon Lessor's reasonable estimate from time to time of its actual cost of
providing such services, including labor, cost of electricity, gas or oil, wear
and tear on equipment and an allowance of 15% to cover overhead and
administrative costs. Lessee shall pay such amounts to Lessor promptly upon
being billed therefor.

         Section 10.4. The Lessee shall pay directly to the supplier or utility
company all charges for utility services supplied to the Leased Premises as
provided in Section 10.1 above. The Lessee shall also pay, as additional rent
hereunder, within 10 days of being billed therefor: (i) all charges for utility
services provided to the Leased Premises which are reasonably allocable to the
Leased Premises by Lessor (including without limitation pursuant to utility
monitor metering as provided in Section 10.6); (ii) all charges provided for
herein with respect to after-hours HVAC services; and (iii) all charges provided
for herein with respect to the overloading or overutilization of utility
services serving the Leased Premises.

         Section 10.5. Except as provided in Section 10.4 above, the Lessor
shall pay for utility services provided to the Leased Premises and to the Common
Facilities. All costs incurred by Lessor pursuant to this Article 10 shall be
included as part of the Operating Costs, as provided in Article 5 hereof.

         Section 10.6. Lessee shall not introduce to the Leased Premises
personnel, fixtures or equipment which (individually or in the aggregate)
overload the capacity of the electrical, HVAC or mechanical systems or other
utility systems serving the Leased Premises or the Building. Without limiting
Lessor's rights hereunder, if Lessee uses the Leased Premises or installs
fixtures or equipment which would so overload said utility systems, as
reasonably determined by Lessor, Lessee shall pay, on demand, as additional
rent, the cost of providing and installing any

<PAGE>   16
additional equipment or other facilities and services that may be required as a
result thereof. In addition to the foregoing, if water is consumed on the Leased
Premises for other than ordinary drinking and lavatory purposes or in excessive
quantities (as reasonably determined by Lessor) or if other utilities are used
on the Leased Premises for other than ordinary purposes or in excessive
quantities (as reasonably determined by Lessor), Lessee shall pay to Lessor, on
demand from time to time, as additional rent, the additional charges resulting
therefrom, as reasonably estimated by Lessor.

         Section 10.7. Lessor reserves the right, at any time, to install
utility meters or monitor meters to measure consumption of any or all utilities
in the Leased Premises and/or to have any and all utilities supplied to the
Leased Premises separately metered and directly served by a utility company; and
the costs incurred by Lessor in connection with the installation, maintenance
and repair of such meters or of such separate supplying shall be borne by Lessee
and shall be paid to Lessor, as additional rent, on demand from time to time.

         Section 10.8. The Lessor shall not be liable for any interruption of
electricity, gas, oil, water, telephone, sewage or other utility service
supplied to the Leased Premises.

                                   ARTICLE 11
                             Liability and Insurance

         Section 11.1.  Liability.

         (a)      The Lessee shall save the Lessor harmless and indemnified from
all injury, loss, claims, damage or liability of whatever nature (including,
without limitation, court costs and reasonable attorney's fees) incurred by
Lessor, and arising: from any act, omission or negligence of the Lessee or
Lessee's Agents with respect to the Leased Premises, the Common Facilities, the
Building or the Property; from the use or occupation thereof by Lessee or
Lessee's Agents or the business conducted thereat by Lessee or Lessee's Agents;
from any default by Lessee hereunder; or in any other respect at, about or in
connection with the Leased Premises during the Term hereof. Upon request of
Lessor, the Lessee shall take over Lessor's defense in any action related to
such matter for which Lessee has agreed to indemnify Lessor.

         (b)      Neither the Lessor nor any agent or employee of the Lessor
shall be liable for any damage to the person or property of the Lessee or of
Lessee's Agents unless due to the negligence or willful misconduct of Lessor,
its agents or employees. Without in any way limiting the generality of the
foregoing, Lessor, its agents or employees shall not be liable, in any event,
for any such damage, or from any damage or loss from interruption of business,
resulting from: (i) any casualty, from steam, gas, electricity, water, rain or
snow, from leaks from pipes, appliances or plumbing, from falling plaster or
other building components, from dampness or from any other cause; (ii) any
hidden defect on the Leased Premises, the Building or the Land; and/or (iii) any
acts or omissions of persons occupying adjacent premises or other parts of the
Building or otherwise entitled to use the Property.

<PAGE>   17
         (c)      All provisions in this lease dealing with the indemnification
and the like of the Lessor by Lessee shall be deemed modified in each case by
the insertion in the appropriate place of the language "except as otherwise
provided in Chapter 186, Section 15 of the General Laws of Massachusetts."

         (d)      Notwithstanding anything to the contrary in this lease, in no
event whatsoever shall Lessor be responsible for incidental or consequential
damages.

         Section 11.2. Insurance.

         (a)      The Lessee shall maintain during the Term of this lease, at
its own expense, comprehensive public liability insurance, in responsible
companies qualified to do business in Massachusetts, which shall insure the
Lessor (as a named, insured party) and all persons claiming under the Lessor
(including Mortgagees), as well as the Lessee against all claims for injuries to
persons (including death) occurring in or about the Leased Premises (for each
occurrence) and against all claims for damages to or loss of property occurring
in or about the Leased Premises (for each occurrence) in the amounts of at least
the Insurance Amounts or such higher amounts of liability insurance coverage as
Lessor shall reasonably require from time to time. The Lessee shall furnish the
Lessor with certificates for such insurance prior to the commencement of the
Term hereof and at least 10 days prior to the expiration date of any of such
policies. Each such policy shall contain a provision that it shall be
noncancelable with respect to the Lessor's or any Mortgagee's interests without
at least 10 days' prior written notice to the Lessor.

         (b)      The Lessor shall maintain fire and extended coverage insurance
covering the Building (but excluding any property or improvements installed by
or belonging to Lessee) against loss by fire and other similar hazards included
within customary building fire and extended coverage insurance polices, in
amounts and forms and with deductibles all as determined by Lessor. All costs
incurred by Lessor hereunder shall be included as a part of the Operating Costs,
as provided in Article 5 hereof.

         (c)      The Lessee shall, at its own expense, maintain fire and
comprehensive casualty insurance of adequate amounts with respect to its own
fixtures, furnishings, merchandise, equipment and other property contained in
the Leased Premises.

                                   ARTICLE 12
                              Waiver of Subrogation

         Section 12.1. Lessor and Lessee each hereby releases the other from any
and all liability or responsibility to the other (or anyone claiming through or
under them by way of subrogation or otherwise) for any loss or damage to
property caused by fire or any of the extended coverage or other insured
casualties, even if such fire or other casualty shall have been caused by the
fault or negligence of the other party, or anyone for whom such party may be
responsible; provided, however, such release shall only be effective to the
extent of any insurance coverage provided by insurance policies maintained by
the releasor which policies contain the clause or endorsement to

<PAGE>   18
the effect that any such release shall not adversely affect or impair said
policies or prejudice the right of the releasor to recover thereunder; and
provided, however, that this release shall be applicable and in force and effect
only with respect to loss or damage occurring during such time as the releasor's
insurance policies shall contain such a clause or endorsement. Lessor and Lessee
each hereby agree that it shall cause such a clause or endorsement to be
included in its policies, if obtainable, and, if necessary, pay any additional
premium that may be charged therefor.

                                   ARTICLE 13
                                      Signs

         Section 13.1. Lessee may provide and install, at its sole expense,
letters or numerals or a sign on or adjacent to the interior entrance door to
the Leased Premises (or such other location as may be determined by Lessor),
identifying Lessee by Lessee's Trade Name and by address, which sign shall be
simple and dignified in appearance, in a style in keeping with other such signs
in the Building (and in accordance with any Building standards for location,
size and graphics, as may be established from time to time by Lessor), and
subject to the prior written approval of Lessor, which approval shall not be
unreasonably withheld. Lessee shall remove such sign upon the expiration of the
Term and shall be responsible for any damage or repairs to the Leased Premises
and Building related to the erection and removal of said sign. If Lessor
provides an office directory in the entrance lobby to the Building, Lessee shall
be identified therein by Lessee's Trade Name and by address.

                                   ARTICLE 14
                            Assignment or Subletting

         Section 14.1. The Lessee shall not assign this lease nor permit any
assignment by mortgage, operation of law or otherwise of this lease, and shall
not sublet all or any portion of the Leased Premises nor permit occupation of
the whole or any part thereof by another, by license or otherwise, without, on
each occasion, first obtaining the Lessor's approval in writing, which approval
may be withheld for any reason whatsoever.

         Section 14.2. If at any time Lessee's interest in this lease is held by
a corporation, trust, partnership or other entity, the transfer of more than
25% of the stock, beneficial interests, partnership interest or other ownership
interest therein (whether at one time or in the aggregate) shall be deemed an
assignment of this lease. Issuance of capital stock will not be deemed an
assignment.

         Section 14.3. Lessee shall reimburse Lessor on demand for any
reasonable costs that Lessor may incur in connection with the consideration of
any proposed assignment or subletting, including, without limitation, the
reasonable costs of investigating the acceptability of the proposed assignee or
subtenant, and reasonable legal costs incurred in connection with any

<PAGE>   19

request for approval of any proposed assignment or subletting, whether or not
said proposed assignment or subletting is approved by Lessor.

         Section 14.4. It shall be a condition of the validity of any
assignment or subletting which has been approved in writing by Lessor that the
assignee or subtenant shall agree directly with Lessor, by written instrument in
form satisfactory to Lessor, to be bound by all the obligations of the Lessee
hereunder, including, without limitation, the obligation to pay rent and other
amounts provided for under this lease, the covenant against further assignment
and subletting, and the covenant to use the Leased Premises only for the
purposes specifically permitted under this lease.

         Section 14.5. Notwithstanding any assignment or subletting of this
lease, Lessee and any guarantor of Lessee's obligations under this lease shall
remain primarily liable for the prompt and timely payment of all base rent,
additional rent and other charges hereunder and for the timely performance of
all of the Lessee's other agreements and obligations hereunder; and the Lessee,
Lessee's Agents and any guarantor of Lessee's obligations under this lease shall
be deemed to have waived any and all suretyship defenses. No consent by the
Lessor to an assignment, sublease or other indulgence or favor at any time
granted by the Lessor to Lessee or to anyone claiming under the Lessee, nor
acceptance of rent from, or other dealing with, anyone claiming under the
Lessee, shall be deemed to constitute any consent to any further assignment,
sublease or other indulgence, or relieve the Lessee or any such guarantor from
their obligations under this lease.

         Section 14.6. If Lessor shall consent to any assignment of this lease
by Lessee or a subletting of the whole of the Leased Premises by Lessee at a
rent which exceeds the rent payable hereunder, or if Lessor shall consent to a
subletting of a portion of the Leased Premises by Lessee at a rent in excess of
the subleased portion's pro-rata share (on a square footage basis) of the rent
payable hereunder by Lessee, then Lessee shall pay to Lessor, as additional
rent, forthwith upon Lessee's receipt of the same or any installment thereof,
the full amount of any consideration given for any such assignment and/or the
full amount of any such excess rent. Each request by Lessee for permission to
assign this lease or to sublet the whole or any part of the Leased Premises
shall be accompanied by a warranty by Lessee as to the amount of rent to be paid
to Lessee by the proposed assignee or sublessee. For purposes of this Section
14.6, the term "rent" shall mean all fixed rent, additional rent or other
payments and/or consideration payable by one party to another for the use and
occupancy of the Leased Premises or any portion thereof or to acquire an
assignment of Lessee's interest in this lease.

                                   ARTICLE 15
                                    Mortgages

         Section 15.1. This lease shall be subject and subordinate to any
existing Mortgages on the Leased Premises or the Property and to any and all
advances made or to be made thereunder and to any extension and/or renewals
thereof; and the Lessee shall from time to time, upon request of the Lessor,
confirm the foregoing and execute and acknowledge instruments confirming same.
In addition, and without limiting the foregoing, the Lessee shall from time to

<PAGE>   20

time, upon request of the Lessor, also subordinate this lease to any future
Mortgages hereafter placed upon the Leased Premises or the Property, and to any
and all advances made or to be made thereunder and to any extensions, renewals,
modifications and/or replacements thereof (and to any modifications and/or
replacements of any existing Mortgages), and Lessee shall from time to time,
upon request of the Lessor, execute and acknowledge instruments evidencing such
subordination, provided that in such instrument of subordination the mortgagee
agrees that so long as the Lessee shall not be in default under this lease, the
Mortgagee will not disturb the peaceful, quiet enjoyment of the Leased Premises
by the Lessee. if this lease is so subordinated, no entry under any such
Mortgage or sale for the purpose of foreclosing the same or repossession or
other action pursuant to such Mortgage shall be regarded as an eviction of the
Lessee, constructive or otherwise, or give the Lessee any right to terminate
this lease. Upon request of Lessor, any such Mortgagee or any new owner or
possessor, Lessee shall attorn to the Mortgagee or new owner or possessor, and
shall agree in writing with any of said parties to so attorn.

         Section 15.2. If any Mortgagee elects, by written notice given to the
Lessee, to have this lease and the interest of the Lessee hereunder superior to
any such Mortgage, then this lease and the interest of the Lessee hereunder,
shall be deemed superior to any such Mortgage, whether this lease was executed
(and notice thereof recorded) before or after the execution and/or recording of
such Mortgage.

         Section 15.3. If Lessor shall at any time, or from time to time, assign
Lessor's interest in this lease, or the rents payable hereunder, conditionally
or otherwise, to any Mortgagee, the Lessee agrees to each of the following:

         (a)      That the execution of such assignment by the Lessor, and the
         acceptance thereof by such Mortgagee, shall never be deemed an
         assumption by such Mortgagee of any of the obligations of the Lessor
         hereunder, unless such Mortgagee shall, by written notice sent to the
         Lessee, specifically otherwise elect.

         (b)      That, except as aforesaid, such Mortgagee shall be treated as
         having assumed the Lessor's obligations hereunder only upon foreclosure
         of such Mortgagee's Mortgage and the taking of possession of the Leased
         Premises by such Mortgagee.

         (c)      To execute an agreement in form satisfactory to such Mortgagee
         consenting to such assignment and acknowledging and recognizing such
         assignment.

                                   ARTICLE 16
                                 Status Reports

         Section 16.1. Recognizing that Lessor may find it necessary to
establish to third parties, such as accountants, banks, mortgagees (or
prospective Mortgagees) purchasers (or prospective purchasers) or the like, the
then current status of performance hereunder, Lessee, on the written request of
the Lessor or of any Mortgagee made from time to time will promptly furnish a
written statement in form satisfactory to Lessor and/or such Mortgagee as to the
status of any matter pertaining to this lease. Without limiting the foregoing,
such statement furnished pursuant to this

<PAGE>   21

Section 16.1 shall, if and to the extent requested by Lessor or any Mortgagee:
(1) ratify this lease; (2) express the Commencement Date and the Termination
Date of this lease; (3) certify that this lease is in full force and effect and
has not been assigned, modified, supplemented or amended (except by such
writings as shall be stated); (4) certify that all conditions under this lease
to be performed by Lessor have been satisfied except as stated; (5) certify that
there are no defenses or offsets against the enforcement of this Lease by
Lessor, except as stated; (6) certify as to the amount of advance rental, if any
(or none if such is the case), paid by Lessee; (7) certify as to the date to
which rental has been paid; (8) certify as to the amount of security deposited
with Lessor; and (9) certify that as of such date (or as of any date designated
by Lessor or such Mortgagee) the entire cost of any work to the Leased Premises
undertaken by Lessee has been paid for, and all liens for material and/or labor
in connection therewith have been discharged. Any statement furnished pursuant
to this Section 16.1 may be relied upon by any purchaser or Mortgagee of the
Leased Premises or the Property, or by any other third party interested in the
status of this lease or the Property.

                                   ARTICLE 17
                               Damage by Casualty

         Section 17.1. If the Leased Premises or the Building shall be damaged
or destroyed by fire or other casualty or cause (a "casualty"), the Lessee shall
immediately give notice thereof to the Lessor. Unless this lease is terminated
as provided in this Article 17, the Lessor at its own expense, and proceeding
with all reasonable dispatch, subject to Unavoidable Delays, shall repair and
reconstruct the same so as to restore the Leased Premises (but not any
Alterations made by or for Lessee or any trade fixtures, equipment or personal
property of Lessee) to substantially the same condition they were in prior to
such casualty, subject to zoning and building laws then in existence.
Notwithstanding the foregoing, in no event shall Lessor be obligated either (i)
to repair or rebuild if the damage or destruction results from any casualty not
insured against or (ii) to expend for such repair or rebuilding more than the
amount of the insurance proceeds (net of all costs and expenses incurred by
Lessor in collecting the same, and net of all insurance proceeds retained by any
Mortgagee) received by Lessor on account thereof.

         Section 17.2. If either the Leased Premises or the Building shall be
damaged or destroyed to the extent of 25% or more by any casualty (whether
insured against by the Lessor or not), or shall be damaged or destroyed to any
lesser extent by any cause not insured against by the Lessor, the Lessor or
Lessee may elect, by written notice to the other party given within 90 days
after the occurrence of such casualty, to terminate this lease, such termination
to be effective 90 days after such notice.

         Section 17.3. If the Leased Premises or the Building shall, within the
last two years of the Term, be damaged or destroyed by any casualty to such
extent that in the judgment of Lessor the same cannot be reasonably expected to
be restored to substantially the same condition as prior to such damage or
destruction within 90 days (or such shorter period to the date of expiration of
the Term) from the time that such repair and reconstruction work would be
commenced, then the Lessor shall have the right to terminate this lease by
notice to the Lessee

<PAGE>   22

given within 90 days after the occurrence of such casualty; however, nothing
herein shall prevent Lessor (or nullify any notice by Lessor) from terminating
this lease pursuant to Section 17.2 above.

         Section 17.4. In the event that the Leased Premises or the Building are
damaged or destroyed by any casualty, then, unless this lease is terminated as
above provided, the Lessee, at its own expense and proceeding with all
reasonable dispatch, shall repair or replace suitably all Alterations made by or
for Lessee and any trade fixtures, equipment or personal property of Lessee
which shall have been damaged or destroyed.

         Section 17.5. If this lease is not terminated as above provided, then
from and after such casualty and until the Leased Premises are substantially
restored as above provided, the base rent reserved herein shall abate
proportionately according to the extent that the Leased Premises have been
rendered untenantable by such damage or destruction.

                                   ARTICLE 18
                                 Eminent Domain

         Section 18.1. In the event of any taking by eminent domain, which shall
be deemed to include a voluntary conveyance in lieu of a taking (a "taking"), of
all of the Property, this lease shall terminate as of the date when Lessee is
required to vacate the Leased Premises.

         Section 18.2. In the event of any taking of all or any part of the
Building, or in the event of any taking which reduces the total area of the Land
by more than 25%, the Lessor shall have the right to terminate this lease by
giving written notice to the Lessee of the Lessor's election to terminate within
90 days after the effective date of such taking. If as a result of any taking
the total floor area remaining in the Leased Premises shall be reduced by more
than 25% of the total floor area in the Leased Premises on the Commencement
Date, then at the election of the Lessor or the Lessee, exercisable by written
notice given to the other within 90 days after the date of the filing of the
notice of such taking, this lease may be terminated as of the date when the
Lessee is required to vacate the Leased Premises or the portion thereof so
taken.

         Section 18.3. The rights to terminate contained in Section 18.2 above
may be exercised notwithstanding that the entire interest of the party
exercising such right may have been divested by such taking.

         Section 18.4. If following any taking of all or any part of the Leased
Premises, the Building or the Land, the lease is not terminated as provided in
Sections 18.1 and 18.2 above, then the Lessor, at the Lessor's expense, but only
to the extent of the award for any such taking received by Lessor (net of all
costs and fees incurred by Lessor in collecting the same and net of any portion
of the award retained by any Mortgagee), and proceeding with all reasonable
dispatch, subject to Unavoidable Delays, shall do such work as may be required
to put what may remain of the Leased Premises (but not any Alterations made by
or for Lessee or any trade fixtures, equipment or personal property of Lessee)
in reasonably proper condition for the

<PAGE>   23

conduct of the Lessee's business; and the Lessee, at the Lessee's expense and
proceeding with all reasonable dispatch, shall do such work as may be required
to repair and replace the Alterations made by or for Lessee and any trade
fixtures, equipment and personal property of the Lessee as may be necessary to
put the remainder of the Leased Premises in reasonably proper condition for the
Lessee's business.

         Section 18.5. In the event of a taking, unless this lease is terminated
as above provided, from and after the date on which the Lessee is required to
vacate the portion of the Leased Premises so taken and until the Leased Premises
are substantially restored as above provided, the base rent reserved herein
shall abate proportionately according to the extent that the Leased Premises
have been rendered untenantable by such taking; and from and after the date on
which the Lessor shall substantially restore the Leased Premises as above
provided the base rent shall be reduced by the proportion that the floor area of
the portion so taken bears to the floor area of the Leased Premises on the date
prior to such taking.

         Section 18.6. The Lessor reserves and excepts all rights to damages to
the Land, the Building, the Leased Premises, the leasehold hereby created, or
awards with respect thereto, then or thereafter accruing, by reason of any
taking by eminent domain or by reason of anything lawfully done or required by
any public authority; and the Lessee grants to the Lessor all the Lessee's
rights, if any, to such damages, except with respect to the value of its
personal property which may be compensable by separate award without reducing
the amount of any award to Lessor and relocation expenses; and Lessee shall
execute and deliver to the Lessor such further instruments of assignment thereof
as the Lessor may from time to time request.

                                   ARTICLE 19
                                    Self-Help

         Section 19.1. If the Lessee shall default in the performance or
observance of any agreement, condition or obligation in this lease to be
performed or observed by Lessee, and shall not cure such default within 30 days
after notice from Lessor specifying the default, Lessor may, at its option,
without waiving any claim for breach of agreement, at any time thereafter cure
such default for the account of Lessee, and make all necessary payments in
connection therewith, including but not limiting the same to reasonable
attorneys fees, costs or charges of or in connection with any legal action which
may have been brought, and any reasonable amount paid by Lessor in so doing
shall be deemed paid for the account of Lessee. Lessee agrees to reimburse
Lessor for all of the foregoing costs with interest thereon from the date, such
costs are incurred at the Default Interest Rate, such sums payable by Lessee to
Lessor to be deemed additional rent and payable on demand. Notwithstanding the
foregoing, Lessor may cure any such default as aforesaid prior to the expiration
of said 30 day period, in the event of an emergency or if the curing of such
default prior to the expiration of said 30 day period is otherwise reasonably
necessary to protect the Property or Lessor's interest therein, or to prevent
injury or damage to persons or property.

<PAGE>   24

                                   ARTICLE 20
                                     Default

         Section 20.1. Each of the following shall be an event of default
hereunder (an "Event of Default"):

         (a)      The failure of Lessee to pay when due any base rent,
         additional rent or other payments hereunder, which failure continues
         for 5 days after receipt of written notice from Lessor.

         (b)      The failure of Lessee to perform any other obligation
         hereunder (other than payment of base rent, additional rent or other
         payments hereunder), which failure continues for 30 days after notice
         thereof is given by Lessor to Lessee.

         (c)      The estate hereby created shall be taken on execution or other
         process of law.

         (d)      The Lessee or any guarantor of Lessee's obligations under this
         lease shall become insolvent or become unable to meet its obligations
         as they become due.

         (e)      The Lessee or any guarantor of Lessee's obligations under this
         lease shall make or offer to make, in or out of bankruptcy, a
         composition with its creditors.

         (f)      The Lessee or any guarantor of Lessee's obligations under this
         lease shall be declared bankrupt, shall make an assignment for the
         benefit of its creditors or if a receiver, trustee or other officer
         shall be appointed to take charge of all or any substantial part of its
         property by a court.

         (g)      A petition for relief shall be filed by or against the Lessee
         or any guarantor of Lessee's obligations under this lease under the
         United States Bankruptcy Code or any successor or similar state or
         federal statute now or hereafter in effect; but if the same is filed
         against but not by Lessee or any guarantor of Lessee's obligations
         under this lease, it shall not be an Event of Default unless same shall
         not be dismissed within 30 days after the date on which it is filed.

         (h)      Lessee shall default in the performance or observance of any
         term, covenant or condition of this lease, and Lessor shall have given
         Lessee notice of at least 3 defaults hereunder in the preceding
         12-month period, regardless of whether Lessee remedies the same within
         any grace period provided herein.

         (i)      Lessee's net worth (as defined in accordance with generally
         accepted accounting principles) at any time is less than $________, or
         if Lessee's working capital (as defined in accordance with generally
         accepted accounting principles) at any time is less than
         $____________________.

         Section 20.2. Upon the occurrence of any Event of Default,
notwithstanding any prior waivers or consent, the Lessor lawfully may, in
addition to and not in derogation of any remedies

<PAGE>   25

for any preceding breach of covenant, immediately or at any time thereafter and
without prior demand or prior notice, terminate this lease by notice in writing
(such termination to be effective forthwith, or on a date stated in said
notice), and/or with process of law enter into and upon the Leased Premises or
any part thereof in the name of the whole and repossess the same and expel the
Lessee and those claiming through or under the Lessee and remove Lessee's and
their effects without being deemed guilty of any manner of trespass and without
prejudice to any remedies which might otherwise be used for arrears of rent or
preceding breach of covenant, and upon entry as aforesaid or on the date of
termination pursuant to the foregoing notices, whichever occurs first, this
lease shall terminate; and the Lessor without notice to the Lessee may store the
Lessee's chattels and those of any person claiming under the Lessee at the
expense and risk of the Lessee or of such person, and, if the Lessor so elects,
may sell such chattels at public auction or private sale and apply the net
proceeds after deduction of reasonable costs to the payment of all sums due to
the Lessor hereunder.

         Section 20.3. In the case of any termination as described in Section
20.2 above, the Lessee shall, at the election of the Lessor, which election may
be changed at any time:

         (a)      Pay to the Lessor in equal monthly installments, in advance,
         sums equal to the aggregate rent (as defined below) herein provided for
         or, if the Leased Premises have been relet, sums equal to the excess of
         the aggregate rent herein provided for over the sums actually received
         by the Lessor from such reletting, plus, in any case, Lessor's Default
         Expenses (as defined below), such sums being payable as liquidated
         damages for the unexpired Term hereof; or

         (b)      Pay to the Lessor as damages a sum which, at the time of such
         termination or at the time to which installments of liquidated damages
         shall have been paid pursuant to subsection (a) above, represents the
         amount by which the then rental value of the Leased Premises is less
         than the aggregate rent herein provided for the residue of the Term and
         pay from time to time to the Lessor upon demand such additional sums as
         are equal to the excess, if any, of the aforesaid rental value of the
         Leased Premises over the rent actually received by Lessor for the
         period from such termination, or from the time to which installments of
         liquidated damages shall have been paid, or from the time to which
         these additional sums may have been paid by Lessee under this
         subsection, whichever the case may be, to the time for which the Lessor
         may specify in its demand hereunder (but in no event to the time later
         then the expiration of the Term hereof), plus, in any case, Lessor's
         Default Expenses.

In any event, regardless of any other remedy available to Lessor, Lessee shall
indemnify the Lessor against loss of the aggregate rent herein provided from the
time of such termination to the expiration date of the Term as provided herein,
plus, in any case, Lessor's Default Expenses.

         Section 20.4. In the event of an Event of Default, if the Lessor shall
elect not to terminate this lease upon such default, it may relet the Leased
Premises or any part or parts thereof in the name of either the Lessor or the
Lessee, for a term or terms which may, at the Lessor's option, extend beyond the
balance of the Term of this lease and may remove and store

<PAGE>   26

the Lessee's effects at the Lessee's expense; and the Lessee agrees that in the
event of such reletting the Lessee shall pay the Lessor any deficiency between
the aggregate rent to be paid hereunder and the net amount of the rents
collected during such reletting, plus in any case, Lessor's Default Expenses.
All such expenses and deficiencies shall be paid by Lessee, as additional rent,
in monthly installments upon statements rendered by the Lessor to the Lessee.

         Section 20.5. In the event of an Event of Default as described in
Section 20.1 above, whether or not the Lessor shall elect to terminate this
lease, or in the event of an occurrence or default which will become an Event of
Default with the passage of time, in addition to all other rights and remedies
of Lessor upon default, Lessee agrees that the Lessee shall pay to the Lessor
any other reasonable costs and expenses incurred by the Lessor as a consequence
of such default, and shall indemnify and hold Lessor harmless from and against
same.

         Section 20.6. In addition to the rights and remedies provided in this
Article, Lessor shall have all other rights and remedies at law or in equity for
any breach by Lessee of the provisions of this lease. All rights and remedies
which the Lessor may have under this lease or at law or in equity shall be
cumulative and shall not be deemed inconsistent with each other, and any two or
more of such rights and remedies may be exercised at the same time insofar as
permitted by law.

         Section 20.7. The Lessor shall not be deemed to be in default hereunder
unless its default shall continue for 30 days, or such additional time as is
reasonably required to correct its default, after written notice thereof has
been given by the Lessee to the Lessor specifying the nature of the alleged
default.

         Section 20.8. The following terms as used herein shall have the
meanings set forth below:

         "Aggregate rent" shall mean all base rent, additional rent and all
other monetary amounts payable hereunder, as same may be adjusted from time to
time under the provisions hereof; provided, at Lessor's option, the additional
rent due under this lease for periods after any default and entry hereunder
and/or after any termination by Lessor shall be computed and determined based
upon the reasonable projected amounts of same for the balance of the unexpired
Term, but in no event less than an annual rate equal to the amount of additional
rent paid or payable with respect to the current Lease Year, Tax Year or
Operating Year, as appropriate.

         "Lessor's Default Expenses" shall mean any reasonable and actual
expenses incurred by the Lessor as a consequence of any default by Lessee
hereunder or in connection with any reletting, including but not limited to,
attorneys, fees, brokers, fees and expenses of repairing, maintaining and
putting the Leased Premises in substantially the same order and condition as the
Leased Premises were in on the Commencement Date or in such better condition as
they were put thereafter and preparing the same for re-rental.

<PAGE>   27

                                   ARTICLE 21
                                     Notices

         Section 21.1. Any notice or other communication relating to this lease
shall be given in writing and shall be deemed to be duly given if sent either
(i) by registered or certified mail, postage prepaid, return receipt requested
or (ii) by overnight mail service as provided by the U.S. mail or by a
nationally recognized private common carrier, and addressed to the party for
whom it is intended at Lessor's Address or at Lessee's Address, as appropriate,
or at the address as designated by such party in a notice given as herein
provided as its address for receiving notices hereunder. The foregoing shall not
be deemed to preclude the giving of written notice hereunder in any other
manner, in which case the notice shall have been deemed to have been given when
actually received by the party for whom designated.

         Section 21.2. After receiving written notice from any person, firm, or
other entity, that it holds a Mortgage which includes as part of the mortgaged
premises the Leased Premises or any part thereof, the Lessee shall, so long as
such Mortgage is outstanding, be required to give to such holder, at its address
set forth in such written notice from such holder, the same notice as is
required to be given to the Lessor under the terms of this lease, such notice to
be given by the Lessee to the Lessor and such holder concurrently. It is further
agreed that such holder shall have the same opportunity to cure any default, and
the same time within which to effect such curing, as is available to the Lessor;
and if necessary to cure such a default, such holder shall have access to the
Leased Premises.

                                   ARTICLE 22
                                Security Deposit

         Section 22.1. Simultaneously with the execution and delivery of this
lease, the Lessee has delivered to the Lessor in current funds the amount of the
Security Deposit. Said sum shall be held by Lessor, without interest, during the
Term hereof and for so long thereafter as Lessee is in possession of the Leased
Premises or has unsatisfied obligations hereunder to Lessor, as security for the
full and timely performance of the Lessee's obligations under the terms of this
lease. In the event that Lessee defaults in respect of any of its obligations
hereunder, Lessor shall have the right to apply from time to time the whole or
any portion of said security deposit toward payment of any amount in default or
in reduction of any damages Lessor might incur as a result of said default; and
such use or application by Lessor shall be without prejudice of any other remedy
Lessor may have under this lease or otherwise at law or in equity. If Lessor
applies said security deposit or any portion thereof as aforesaid, Lessee shall,
upon notice from Lessor (and within the grace period applicable to rent
hereunder), promptly replace the amount applied in order to restore said
security deposit to its original amount. Any portion of said security deposit
which has not been applied as aforesaid shall be repaid by Lessor, without
interest, to Lessee at the end of the Term, or as soon thereafter as all
obligations of Lessee hereunder have been performed in full.

<PAGE>   28

                                   ARTICLE 23
                              Environmental Hazards

         Section 23.1. Lessee's Use of Hazardous Matter. Lessee and Lessee's
Agents, shall not use, maintain, generate, allow or bring on the Leased Premises
or the Property or transport or dispose of, on or from the Leased Premises or
the Property (whether into the ground, into any sewer or septic system, into the
air, by removal off-site or otherwise) any Hazardous Matter (as hereinafter
defined), except only for Hazardous Matter of types and in quantities as are
used in connection with the Permitted Uses occurring in the Leased Premises,
provided such use and storage is in strict compliance with all Environmental
Requirements (as hereinafter defined) and with the provisions of this Article
23.

         Lessee shall inspect, handle, store and dispose of all Hazardous
Matter in compliance with all Environmental Requirements. Lessee shall not
release, discharge, leak or emit, or permit to be discharged, leaked, or
emitted, any material into the environment (including the atmosphere, ground,
sewer system, or any body of water) in violation of any Environmental
Requirements, including, without limitation, the laws and regulations
specifically referenced in this Article 23, and the Occupational Safety and
Health Act, 29 U.S.C. Section 651 et seq. ("OSHA"), or the terms of any permits
or licenses.

         Section 23.2. Discharges to Sanitary Sewer. Lessee shall obtain an
industrial use permit from the Massachusetts Water Resource Authority ("MWRA")
if required to do so by law or regulation and a state sewer permit from the
state Division of Water Pollution Control and shall comply with the discharge
regulations contained in 314 CMR Part 12 and 360 CMR Part 10 and any
pretreatment conditions contained in the applicable sewer permit and shall cause
Lessee's Agents to so comply.

         Section 23.3. Notices. Lessor and Lessee mutually agree to promptly
deliver to the other any notices, orders, findings or similar documents received
from any governmental agency or official affecting the Premises and concerning
violation of Environmental Requirements. Lessee shall send to Lessor copies of
all notices and reports to any government agency of any releases of Hazardous
Matter, with such notices and reports to be sent simultaneously with their being
sent to such government agency.

         Section 23.4. Liability. Lessee shall be fully liable for all costs and
expenses related to the use, storage, removal, and disposal of Hazardous Matter
kept on the Leased Premises or the Property by the Lessee. Lessee shall pay
forthwith any fine assessed in connection with any violation by Lessee or
Lessee's Agents of any Environmental Requirements.

         The Lessee shall give immediate notice to the Lessor of any violation
or potential violation of all Environmental Requirements, including without
limitation the regulations specifically referred to in this Article 23.

         Notwithstanding any other provisions of this Lease to the contrary,
during the investigation and cleanup of any release and during any restoration,
maintenance or repair work

<PAGE>   29

that is the responsibility of the Lessee under this Article 23, Lessee shall
continue to pay all rent hereunder without abatement, even though part or all of
the Leased Premises or the Property may be unusable.

         Section 23.5. Lessee's Responsibility to Clean Up Any Release. If
Lessee releases any Hazardous Matter or oil on or into the Leased Premises or
the Property or surrounding area (whether or not such release is of a reportable
amount under any Environmental Requirements), Lessee shall forthwith take all
actions which are necessary to attain cleanup levels in accordance with any
Environmental Requirements, to mitigate Environmental Damages (as hereinafter
defined), and to allow full economic use of the Leased Premises and Property.
These actions shall include without limitation, investigation and cleanup in
accordance with 42 U.S.C. Section 9601 et seq. ("CERCLA"), General Laws, Chapter
21E, General Laws, Chapter 21C, or OSHA, as applicable. All such investigation
and remedial work shall be performed by contractors acceptable to Lessor and in
accordance with the Environmental Requirements. Any such action shall be
performed in a good, safe and workmanlike manner and shall minimize any impact
on other tenants occupying the Property and the businesses conducted thereon.
Lessee shall promptly provide to Lessor copies of testing results and all other
reports.

         Following such cleanup, Lessee shall promptly take all actions at its
sole expenses as are necessary to return the Leased Premises and Property to the
condition existing prior to the introduction of any such Hazardous Matter or oil
to the Leased Premises or the Property.

         Section 23.6. Disposal. Lessee shall remove from the Leased Premises
and the Property prior to the expiration or any termination of the Term of the
Lease all Hazardous Matter used, maintained, generated, allowed or brought on to
the Leased Premises or the Property by Lessee or Lessee's Agents, and the
containers in which such substances were ever packaged or stored, exclusive of
building components (including pipe covering) where such building components
existed at the commencement of this Lease. Such removal and disposal shall be
performed in accordance with 310 CMR Part 30.

         Section 23.7. Inspection. Lessee grants Lessor, upon reasonable oral or
written notice, the right to inspect the Leased Premises throughout the term of
this Lease to determine whether Lessee is in compliance with the provisions in
this Article 23; and Lessee shall provide Lessor with all information reasonably
deemed by Lessor necessary for Lessor to ascertain whether Lessee so complies.
If Lessor finds that there has been a violation of any of the Environmental
Requirements, Lessor may retain an environmental site assessment firm of its
choice to inspect the Leased Premises and the Property and surrounding areas for
the improper storage of hazardous waste, release of hazardous material or oil,
to test any samples of such suspected material and to prepare a report. The
cost of such inspection, testing, and report preparation shall be paid by Lessee
to Lessor within 30 days of demand therefor as additional rent hereunder.

         Section 23.8. Default. Any breach of the obligations contained in this
Article 23 shall be deemed a breach of a material obligation of Lessee under
this Lease, which breach shall be deemed a default hereunder.

<PAGE>   30

         If Lessor determines that Lessee has not proceeded diligently to cure
any such default hereunder, Lessor, in addition to any other remedy under this
Lease, shall have the right, but not the obligation, to enter upon the Leased
Premises and to perform Lessee's obligations hereunder, including the payment of
money (including any fines) and the performance of any other act. All sums so
paid by Lessor and all necessary incidental costs and expenses in connection
therewith shall be paid by Lessee to Lessor within 30 days of demand therefor as
additional rent hereunder. Notwithstanding any such re-entry by Lessor, Lessee
shall remain primarily liable for any violation of the above agreements.

         Section 23.9. Lessee's Indemnification. Lessee and its successors,
assigns and guarantors shall release, defend (with an attorney reasonably
acceptable to Lessor), indemnify and hold harmless Lessor and its successors and
assigns and the officers, directors, stockholders, partners, beneficial owners,
trustees, employees, agents, contractors, attorneys, and mortgagees of Lessor or
of its successors and assigns or of any of the foregoing from and against all
Environmental Damages (as hereinafter defined) which may be asserted by Lessee,
any other person or entity, or government agency on account of: (1) the presence
or release of any Hazardous Matter used, maintained, generated, allowed or
brought on to the Leased Premises or the Property by Lessee or Lessee's Agents
during the Term and during any period when the Lessee, or Lessee's Agents are
occupying the Leased Premises or any part thereof, unless caused by Lessor or
Lessor's contractors, agents or employees, or unless present on the Premises
prior to the Term Commencement Date (or, if earlier, the date of Lessee's
initial entry onto the Premises); (2) the activities or other action or inaction
of Lessee or Lessee's Agents in violation of any Environmental Requirements; and
(3) the breach of any of Lessee's obligations under this Article 23.

         Section 23.10. Definitions. The following terms as used herein shall
have the meanings set forth below:

         "Hazardous Matter" shall mean any substance: (i) which is toxic,
explosive, corrosive, flammable, infectious, radioactive, carcinogenic,
mutagenic, biological, or otherwise hazardous which is or becomes regulated by
any governmental authority, agency, commission or instrumentality of the United
States, the Commonwealth of Massachusetts or any political subdivision thereof
including the City of Boston; (ii) which is or becomes defined as a "hazardous
substance" pursuant to Section 101 of the Comprehensive Environmental Response,
Compensation and Liability Act, 42 U.S.C. Section 9601 ET SEQ., or is or becomes
defined as a "hazardous material or oil, under M.G.L. Ch. 21E, Section 2, and
the Massachusetts Contingency Plan, 310 CMR Part 40; (iii) which is or becomes
defined as "hazardous waste" under 42 U.S.C. Section 6901 ET SEQ. or under
M.G.L. Ch. 21C; 310 CMR Part 30; (iv) which is or becomes defined as a
"radioactive substance" under 42 U.S.C. Section 2011 ET SEQ. or 10 CFR Parts 0
to 17, or under M.G.L. Ch. 111H, Sections 1 to 48, or 105 CMR Parts 120 to 122;
(v) the presence of which requires investigation or remediation under any
federal, state or local statute, regulation, ordinance, by-law, order, action,
policy or common law; (vi) which contains gasoline, diesel fuel, oil or other
petroleum hydrocarbons; or (vii) the presence or release of which may provide
persons or entities with rights and remedies under nuisance, tort, strict
liability or other common

<PAGE>   31
law theories of liability due to such substance's presence or release or the
hazard or threat of hazard thereby posed to the health or safety of persons on
or about or adjacent to the Premises.

         "Environmental Requirements" shall mean all Applicable Laws (including
without limitation the laws and regulation specifically referenced in this
Article 23), common law principles pertaining to nuisance, tort and strict
liability, the provisions of any and all permits, licenses and approvals, any
recommendations by manufacturers, trade associations and governmental bodies,
and the terms and conditions of this Lease; insofar as same relate to the
release, maintenance, use, keeping in place, transportation, disposal or
generation of Hazardous Matter, including without limitation those pertaining to
reporting, licensing, permitting, health and safety of persons, investigation,
containment, remediation, and disposal; and shall include both present and
future laws and regulations, orders, permits and approvals, recommendations, and
rules and regulations.

         "Environmental Damages" shall mean all liabilities, injuries, losses,
claims, damages (whether special, consequential or otherwise), settlements,
attorneys' and consultants, fees, fines and penalties, interest and expenses,
and costs of environmental site investigations, reports and cleanup, including
without limitation costs incurred in connection with: any investigation or
assessment of site conditions or of health of persons using the Building or
Lessor's Property; risk assessment and monitoring; any cleanup, remedial,
removal or restoration work required by any governmental agency or recommended
by Lessor's environmental consultant; any decrease in value of Lessor's.
Property; any damage caused by loss or restriction of rentable or usable space
in Lessor's Property; or any damage caused by adverse impact on marketing or
financing of Lessor's Property.

         Section 23.11. Miscellaneous.

                  (a)      The provisions of this Article 23 shall be in
addition to any other obligations and liabilities Lessee may have to Lessor
under this Lease or at law or in equity.

                  (b)      In the case of conflict between this Article 23 and
other provisions of this Lease, the provisions imposing the most stringent
requirements as to Lessee shall control.

                  (c)      Any provisions in this Lease purporting to limit
Lessee's liability or absolve Lessee of responsibility or cause Lessor to look
solely to its insurance shall be wholly inapplicable with respect to any matters
covered by this Article 23.

                                   ARTICLE 24
                            Miscellaneous Provisions

         Section 24.1. No consent or waiver, express or implied, by the Lessor
to or of any breach in the performance by the Lessee of its agreements hereunder
shall be construed as a consent or waiver to or of any other breach in the
performance by the Lessee of the same or any other agreement. No acceptance by
the Lessor of any rent or other payment hereunder, even with the knowledge of
any such breach, shall be deemed a waiver thereof nor shall any acceptance of

<PAGE>   32
rent or other such payment in a lesser amount than is herein required to be paid
by the Lessee, regardless of any endorsement on any check or any statement in
any letter accompanying the payment of the same, be construed as an accord and
satisfaction or in any manner other than as a payment on account by the Lessee.
No reference in this lease to any assignee, sublessee, licensee or
concessionaire, or acceptance by the Lessor from other than the Lessee of any
payment due hereunder shall be construed as a consent by the Lessor to any
assignment or subletting by the Lessee, or to give to the Lessee any right to
permit another to occupy any portion of the Leased Premises except as herein
expressly provided. No waiver by the Lessor in respect of any one tenant shall
constitute a waiver with respect to any other tenant. Failure on the part of the
Lessor or Lessee to complain of any action or nonaction on the part of the
Lessee or Lessor or to declare the Lessee or Lessor in default, no matter how
long such failure may continue, shall not be deemed to be a waiver by the Lessor
of any of its rights hereunder.

         Section 24.2. If at any time a dispute shall arise as to any amount or
sum of money to be paid by one party to the other under the provisions hereof,
the party against whom the obligation to pay the money is asserted shall have
the right to make payment "under protest" and such payment shall not be regarded
as a voluntary payment and there shall survive the right on the part of the
party making such payment to institute suit to recover such payment. If it shall
be adjudged that there was no legal obligation on the part of said party to pay
such sum or any part thereof, said party shall be entitled to recover such sum
or so much thereof as it was not legally required to pay under the provisions of
this lease; if at any time a dispute shall arise between the parties hereto as
to any work to be performed by either of them under the provisions hereof, the
party against whom the obligation to perform the work is asserted may perform
such work and pay the cost thereof "under protest" and the performance of such
work shall in no event be regarded as a voluntary performance and there shall
survive the right on the part of said party to institute suit for the recovery
of the cost of such work. If it shall be adjudged that there was no legal
obligation on the part of said party to perform the same or any part thereof and
that there was a legal obligation on the other party to perform same, said party
who performed same shall be entitled to recover the cost of such work or the
cost of so much thereof as said party was not legally required to perform under
the provisions of this lease and which the other party was legally required to
perform.

         Section 24.3. The Lessor shall not be liable for a delay or failure in
the commencement, performance or completion of any of its obligations hereunder
where such delay or failure is attributable to Unavoidable Delays.

         Section 24.4. Lessor agrees that, upon Lessee's paying the rent and
performing and observing the agreements, obligations and other provisions on its
part to be performed and observed, Lessee shall and may peaceably and quietly
have, hold and enjoy the Leased Premises during the Term of this lease without
any manner of hindrance or molestation from Lessor or anyone claiming under
Lessor, subject, however, to the rights of holders of present and future
Mortgages, and to the terms and provisions of this lease.

         Section 24.5. If the Lessee continues to occupy the Leased Premises
after the termination of this lease, it shall have no more rights than a tenant
by sufferance, but shall be

<PAGE>   33

liable for 200% of aggregate rental as above determined during such occupancy
(and if varying rates are specified herein, at 200% of the highest such rate),
and shall be liable for any loss or expense incurred by Lessor due to such
holding over. Nothing in this Section shall be construed to permit such holding
over.

         Section 24.6. Neither the vacating of the Leased Premises by Lessee nor
the delivery of keys to or the acceptance of keys by the Lessor or any employees
or agents of Lessor shall operate as a termination of this lease or a surrender
or an acceptance of surrender of the Leased Premises.

         Section 24.7. In the event any rent (whether base rent or additional
rent) or any other payments due from Lessee under this lease are not paid when
due, then Lessee shall pay to Lessor, as additional rent, interest on such
overdue amounts from the date such amounts become due to the date on which same
are paid (the "delinquency period") at an interest rate equal to the Default
Interest Rate with respect to the delinquency period (such Default Interest Rate
to be recalculated, if appropriate, for each day during the delinquency period).

         Section 24.8. If, during the Term, Lessor receives 4 or more checks
from Lessee which are returned by Lessee's bank for insufficient funds or are
otherwise returned unpaid, Lessee agrees that all checks thereafter shall be
either bank certified, cashiers, or treasurer's checks. All bank charges
resulting from any such returned checks, together with a reasonable service
charge for the administrative and overhead expenses of Lessor, shall be paid by
Lessee as additional rent hereunder.

         Section 24.9. If Lessor commences any summary proceeding for nonpayment
of base rent, additional rent or any other payments due hereunder, Lessee hereby
waives the right to interpose any counterclaim of whatever nature or description
in any such proceeding; provided, however, that Lessee shall have the right to
bring a separate action against Lessor to the extent otherwise allowed under
this lease as long as Lessee does not attempt to have such action joined or
otherwise consolidated with Lessor's summary proceeding.

         Section 24.10. Except as otherwise specifically provided in this lease,
any consent or approval to be given by Lessor under this lease may be withheld
or denied at Lessor's sole and absolute discretion. Whenever in this lease the
consent or approval of Lessor is required, and it is specifically provided that
such consent or approval is not to be unreasonably withheld, delayed or
conditioned, but nevertheless Lessor shall refuse or delay or condition such
consent or approval, Lessee shall not be entitled to make any claim, and Lessee
hereby waives any claim, for money damages (nor shall Lessee claim any money
damages by any setoff, counterclaim or defense) based upon any claim or
assertion by Lessee that Lessor unreasonably withheld or delayed or conditioned
its consent or approval; and Lessee's sole remedy in such circumstances shall be
an action or proceeding for specific performance, injunctive relief or
declaratory judgment; provided, however, if Lessor has acted in bad faith and in
willful wrongful disregard of its obligation not to unreasonably withhold its
consent or approval where required not to do so, Lessee can recover its
reasonable attorney's fees from Lessor to the extent otherwise allowed under
this lease.

<PAGE>   34

         Section 24.11. The conditions in this lease contained to be kept and
performed by the parties hereto shall be binding upon and inure to the benefit
of said respective parties, their heirs, legal representatives, successors and
assigns; provided, however, nothing in this Section shall be construed to permit
any assignment by Lessee, except in accordance with Article 14, and no assignee
of Lessee shall have any rights hereunder unless the assignment was accomplished
with said Article 14. Wherever in this lease reference is made to either of the
parties, it shall be held to include and apply to the heirs, legal
representatives, successors and assigns of such party as if in each case so
expressed, unless the context requires otherwise and regardless of the number or
gender of such party. Notwithstanding the foregoing provisions of this Section,
the term "Lessor" as used in this lease means only the owner for the time being
of the Leased Premises, so that in the event of any sale or sales of the Leased
Premises or of this lease the Lessor shall be and hereby is entirely released of
all covenants and obligations of the Lessor hereunder.

         Section 24.12. If the Lessor shall at any time be an individual, joint
venture, tenancy in common, firm, partnership (general or limited), trust or
trustees of a trust, it is specifically understood and agreed that there shall
be no personal liability of the Lessor or any joint venturer, tenant, partner
(general or limited), trustee, shareholder, beneficiary or holder of a
beneficial interest, under any of the provisions hereof or arising out of the
use or occupation of the Leased Premises by Lessee. In the event of a breach or
default by Lessor of any of its obligations under this lease, Lessee shall look
solely to the equity of the Lessor in the Leased Premises for the satisfaction
of Lessee's remedies, and it is expressly understood and agreed that Lessor's
liability under the terms, covenants, conditions, warranties and obligations of
this lease shall in no event exceed the loss of such equity interest. It is
further understood and agreed that the liability of any party who is a Lessor
(whether the original Lessor or any successor Lessor) shall be limited to
defaults occurring or arising during the period for which such party shall have
been a Lessor, and such party shall not be liable for defaults occurring or
arising at any time before such party obtained its interest as lessor or after
such party disposed of its interest as lessor.

         Section 24.13. Lessor and Lessee each agree upon request of the other
to execute and deliver to the other a notice of lease or short form of lease
suitable for recording and setting forth the name of the Lessor and the Lessee,
the term of the lease and an appropriate description of the Leased Premises. No
copy of this lease or any portion hereof shall be recorded in any Registry of
Deeds or Land Court Registry District.

         Section 24.14. Lessee warrants and represents that it has dealt with no
broker in connection with the consummation of this Lease except the Broker, and
in the event of any brokerage claims against Lessor predicated upon dealings by
Lessee with any broker except the Broker, Lessee agrees to defend the same and
indemnify and hold Lessor harmless against any such claim.

         Section 24.15. If any provision of this lease or the application
thereof to any person or circumstance shall be to any extent invalid or
unenforceable, the remainder of this lease and the application to persons or
circumstances other than those as to which it is invalid or unenforceable

<PAGE>   35

shall not be affected there by, and each term and provision of this lease shall
be valid and be enforced to the fullest extent permitted by law.

         Section 24.16. This lease shall constitute the only agreement between
the parties relative to the Leased Premises and no oral statements and no prior
written matter not specifically incorporated herein shall be of any force or
effect. In entering into this lease, the Lessee relies solely upon the
representations and agreements contained herein. This agreement shall not be
modified except by writing executed by both parties.

         Section 24.17. In no case shall mention of specific instances under a
more general provision be construed to limit the generality of said provision.

         Section 24.18. The section and article headings throughout this
instrument, if any, are for convenience and reference only, and the words
contained therein shall in no way be held to limit, define or describe the scope
or intent of this lease or in any way affect this lease.

         Section 24.19. This lease shall be construed without regard to any
presumption or other rule requiring construction against the party causing this
lease to be drafted.

         Section 24.20. Lessor and Lessee agree that time is of the essence of
this lease.

         Section 24.21. If more than one party is lessee hereunder, the
obligations of Lessee hereunder shall be joint and several.

         Section 24.22. Employees or agents of the Lessor have no authority to
make or agree to make a lease or any other agreement in connection herewith. The
submission of this document or a summary of some or all of its provisions for
examination and negotiation does not constitute an option to lease, or a
reservation of, or option for, the Leased Premises, and this document shall
become effective and binding only upon the execution and delivery hereof by both
parties.

         Section 24.23. Lessee, if not in default in Lessee's obligations under
this lease, shall have the right to terminate this lease as of the last day of
March, 1997, or the last day of any calendar month thereafter during the term,
by providing to Lessor written notice of intent to terminate, Certified mail
RRR, at least six (6) months in advance of proposed termination date, and by
including with said termination notice a payment for such cancellation in the
amount of Eleven Thousand Seven Hundred Fifty Dollars ($11,750.00), which
cancellation payment shall be in addition to all other amounts due under this
lease. Notification without payment enclosed shall be treated as if no
notification was given.

         Section 24.24. Lessee is hereby granted early occupancy of premises on
September 15, 1995. Base rent and additional rent for early occupancy by Lessee
is hereby waived for the period beginning September 15, 1995, and ending
September 30, 1995. All other terms and conditions of the lease shall apply
during the period from the date Lessee begins such occupancy to Commencement
Date.

<PAGE>   36
         Section 24.25. Lessee will provide to Lessor, for Lessor prior written
approval, complete and detailed plans for Lessee's installation of exhaust
systems, security systems, argon tank(s), nitrogen tank(s) and/or a pad mount
chiller. All of the foregoing shall meet all Applicable Law, and be performed in
a good and workmanlike manner. Lessor approval will not be unreasonably withheld
or delayed.

         Section 24.26. Lessor, at Lessor's sole expense, shall put HVAC systems
serving the demised premises into working condition as of the commencement date
of this lease.

         Executed under seal, in multiple counterparts, as of the above-written
date.

Witness for Lessee:                      LESSEE:   Evergreen Solar, Inc.

/s/                                      By: /s/ Mark Farber
-----------------------------                -----------------------------------

Witness for Lessor:                      LESSOR: 211 Second Ave Realty LP

/s/                                      By: /s/ Robert Solar
-----------------------------                -----------------------------------

<PAGE>   37

                                    EXHIBIT A
                                 Leased Premises
                                 ---------------

                                    (OMITTED)

<PAGE>   38

                                   ADDENDA #1

         TO LEASE DATED September 15, 1995, between 211 Second Avenue Realty
L.P., Lessor, and Evergreen Solar, Inc., a Delaware corporation, Lessee, and
covering first floor premises in the building known as and numbered 211 Second
Avenue, Waltham, MA containing approximately 9,400 square feet and being those
premises formerly occupied by OmniSys, Inc., successor to General Microfilm,
Inc.

         IT IS HEREBY MUTUALLY AGREED:

         1.       At the termination of this lease, as extended, Landlord, in
                  Landlord's sole discretion, shall determine which, if any, of
                  Tenant improvements must be removed by Tenant, and Tenant
                  shall remove same. The balance of improvements shall stay with
                  the building and become the property of the Landlord.

         2.       All other terms and conditions shall remain unchanged.

         IN WITNESS WHEREOF our hands and seals this 15th day of September,
1995.

                                         211 SECOND AVENUE REALTY L.P.
                                         ---------------------------------------
Witness                                                                   Lessor

/s/                                      By: /s/ Robert Solar
-----------------------------                -----------------------------------
Witness

                                         EVERGREEN SOLAR, INC.
                                         ---------------------------------------
                                                                          Lessee

/s/                                      By: /s/ Mark Farber
-----------------------------                -----------------------------------
Witness

<PAGE>   39

                                RENEWAL AGREEMENT

         IT IS MUTUALLY AGREED that the lease heretofore entered into on the
15th day of September, 1995, between 211 Second Avenue Realty LP, a
Massachusetts partnership, as Landlord, and Evergreen Solar, Inc., a Delaware
corporation, as Tenant, covering the premises situated in the City of Waltham,
Commonwealth of Massachusetts, more particularly described as follows:

         Approximately 9,400 square feet of space on the first floor of the
         building known as and numbered 211 Second Avenue, Waltham, MA and being
         those premises currently occupied by Tenant

is hereby renewed for a further period of one (1) year to begin October 1, 1998,
and to expire on September 30, 1999, upon the same terms, covenants and
conditions as contained therein, except:

                  1.      Minimum annual rent during the extended term shall be
                  One Hundred Forty-one Thousand Dollars ($141,000.00) to be
                  paid 1/12 monthly in advance without demand in the amount of
                  Eleven Thousand Seven Hundred Fifty Dollars ($11,750.00).

                  2.      Either party to this lease may cancel this lease at
                  the end of any month on or after November 30, 1998 by
                  providing to the other party written notice of intent to
                  cancel, Certified Mail RRR, at least sixty (60) days prior to
                  proposed termination date.

                  3.      All other terms and conditions shall remain unchanged.

         IN WITNESS WHEREOF the parties to said lease have executed this
agreement in duplicate and affixed their seals this 15 day of July, 1998.

                                        211 Second Avenue Realty, LP, Landlord

Attest: /s/                             By: /s/ Robert Solar
        --------------------------          ------------------------------------
                                            Evergreen Solar, Inc., Tenant

Attest: /s/                             By: /s/ Mark Farber
        --------------------------          ------------------------------------

<PAGE>   40
                            TENANCY AT WILL AGREEMENT

     IT IS MUTUALLY AGREED that the lease heretofore entered into on the 15th
day of September, 1995, and renewed July, 1998, between 211 Second Avenue Realty
LP, a Massachusetts partnership, as Landlord and Evergreen Solar, Inc., a
Delaware corporation, as Tenant, covering the premises situated in the City of
Waltham, Commonwealth of Massachusetts, more particularly described as follows:

     Approximately 9,400 square feet of space on the first floor of the building
     known as and numbered 211 Second Avenue, Waltham, MA and being those
     premises currently occupied by Tenant

is hereby extended to October 31, 1999, upon the same terms, covenants and
conditions as contained therein, except:

     1. Minimum annual rent during the extended term shall be One Hundred
     Forty-one Thousand Dollars ($141,000.00) to be paid 1/12 monthly in advance
     without demand in the amount of Eleven Thousand Seven Hundred Fifty Dollars
     ($11,750.00).

In all other respects the Lease shall remain unmodified and in full force and
effect.

     IN WITNESS WHEREOF the parties to said lease have executed this agreement
in duplicate and affixed their seals this 28th day of September, 1999.

                                       211 Second Avenue Realty LP,    Landlord

     Attest: /s/ Norma Woodall         By: /s/ Robert Solar
            ------------------------      ---------------------------

                                       Evergreen Solar, Inc.,          Tenant

     Attest: /s/ Richard Chleboski     By: /s/ Mark Farber
            ------------------------      ---------------------------

<PAGE>   41

                            TENANCY AT WILL AGREEMENT

     IT IS MUTUALLY AGREED that the lease heretofore entered into on the 15th
day of September, 1995, and renewed July, 1998, between 211 Second Avenue Realty
LP, a Massachusetts partnership, as Landlord and Evergreen Solar, Inc., a
Delaware corporation, as Tenant, covering the premises situated in the City of
Waltham, Commonwealth of Massachusetts, more particularly described as follows:

     Approximately 9,400 square feet of space on the first floor of the building
     known as and numbered 211 Second Avenue, Waltham, MA and being those
     premises currently occupied by Tenant

is hereby extended to November 30, 1999, upon the same terms, covenants and
conditions as contained therein, except:

     1. Minimum annual rent during the extended term shall be One Hundred
     Forty-one Thousand Dollars ($141,000.00) to be paid 1/12 monthly in advance
     without demand in the amount of Eleven Thousand Seven Hundred Fifty Dollars
     ($11,750.00).

In all other respects the Lease shall remain unmodified and in full force and
effect.

     IN WITNESS WHEREOF the parties to said lease have executed this agreement
in duplicate and affixed their seals this 22nd day of October, 1999.

                                          GelTex Pharmaceuticals Inc., Landlord

     Attest: /s/ Richard Chleboski        By: /s/ Mark Farber
            -------------------------        ---------------------------

                                          Evergreen Solar, Inc., Tenant

     Attest: /s/ Sheila Finan             By: /s/ Paul J. Milton
            -------------------------        ----------------------------
                                             Geltex Pharmaceuticals, Inc.

<PAGE>   42

                            TENANCY AT WILL AGREEMENT

     IT IS MUTUALLY AGREED that the lease heretofore entered into on the 15th
day of September, 1995, and renewed July, 1998, September 1999, and October 1999
between 211 Second Avenue Realty LP, a Massachusetts partnership, as Landlord
and Evergreen Solar, Inc., a Delaware corporation, as Tenant, covering the
premises situated in the City of Waltham, Commonwealth of Massachusetts, more
particularly described as follows:

     Approximately 9,400 square feet of space on the first floor of the building
     known as and numbered 211 Second Avenue, Waltham, MA and being those
     premises currently occupied by Tenant

is hereby extended to December 31, 1999, upon the same terms, covenants and
conditions as contained therein, except:

     1. Minimum annual rent during the extended term shall be One Hundred
     Forty-one Thousand Dollars ($141,000.00) to be paid 1/12 monthly in advance
     without demand in the amount of Eleven Thousand Seven Hundred Fifty Dollars
     ($11,750.00).

In all other respects the Lease shall remain unmodified and in full force and
effect.

     IN WITNESS WHEREOF the parties to said lease have executed this agreement
in duplicate and affixed their seals this 30th day of November, 1999.

                                          GelTex Pharmaceuticals Inc., Landlord

     Attest: /s/ Richard G. Chleboski     By: /s/ Mark A. Farber
            -------------------------        --------------------------

                                          Evergreen Solar, Inc., Tenant

     Attest: /s/ Sheila Finan             By: /s/ Paul J. Mellett, Jr.
            -------------------------        --------------------------

<PAGE>   43

                               AMENDMENT TO LEASE

     This Amendment to Lease is dated as of December 29, 1999 (this
"Amendment"), by and between GelTex Pharmaceuticals, Inc., a Delaware
corporation, having an address at 153 Second Avenue, Waltham, Massachusetts
02451, successor in interest to 211 Second Avenue Realty L.P., as landlord (the
"Landlord"), and Evergreen Solar, Inc., a Delaware corporation having an address
at 211 Second Avenue, Waltham, Massachusetts 02451, as tenant (the "Tenant").

                              PRELIMINARY STATEMENT

     Landlord's predecessor and Tenant entered into a Lease, dated September 15,
1995, covering the first floor of the building located at 211 Second Avenue,
Waltham, Massachusetts, containing approximately 9,410 square feet (the
"Premises"). The Lease was renewed pursuant to a Renewal Agreement dated July
1998 and extended pursuant to so-called Tenancy at Will Agreements, dated
September 1999, October 1999 and November 1999, and now expires on December 31,
1999.

     Landlord and Tenant desire to extend the Term of the Lease until December
31, 2000 and to make certain other modifications to the Lease.

     NOW, THEREFORE, in consideration of the premises and other mutual
consideration respectively acknowledged by the parties to have been received and
be sufficient, Landlord and Tenant covenant and agree as follows:

     1. The Term of the Lease is hereby extended for a period of one (1) year to
begin January 1, 2000 and to expire on December 31, 2000.

     2. The Annual Base Rent during such extended Term shall be ONE HUNDRED
FORTY-ONE THOUSAND DOLLARS ($141,000.00), to be paid in equal monthly
installments of ELEVEN THOUSAND SEVEN HUNDRED FIFTY DOLLARS ($11,750.00), in
advance, without demand, deduction or set-off.

     3. The Security Deposit is increased to THIRTY-FIVE THOUSAND TWO HUNDRED
FIFTY DOLLARS ($35,250.00).

     4. Either party to this Lease may cancel this Lease as of the last day of
any month on or after July 1, 2000 by giving to the other party written notice
of its intention to cancel this Lease by certified mail, return receipt
requested, at least ninety (90) days prior to the proposed termination date.

     5. Upon the expiration or earlier termination of this Lease and prior to
the return of the Security Deposit by Landlord, Tenant agrees to provide
Landlord with a Phase I environmental site assessment performed in accordance
with professional engineering practices in the Commonwealth of Massachusetts
and, if requested by Landlord, a Premises decontamination report, both such
reports to be satisfactory in all respects to Landlord. Landlord

<PAGE>   44

agrees to pay one-half the cost of the environmental site assessment provided
that Landlord selects the engineering firm which performs the assessment.

     6. Except as herein expressly modified, all provisions of the Lease are
hereby ratified and confirmed.

     IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
and delivered, under seal, as of the date and year first above written.

                                       GELTEX PHARMACEUTICALS, INC.

                                       By: /s/ Paul J. Mellett, Jr.
                                          ---------------------------------

                                       Its: Chief Financial Officer
                                           --------------------------------

                                       EVERGREEN SOLAR, INC.

                                       By: /s/ Mark A. Farber
                                          ---------------------------------
                                          Mark A. Farber
                                          Its: President

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