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400 Minuteman Drive Cost Plus Fee Agreement - NaviSite Inc. and Gilbane Building Co.

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                                 COST PLUS FEE

                           STANDARD FORM OF AGREEMENT

                               BETWEEN TENANT AND

                              CONSTRUCTION MANAGER

AGREEMENT Made as of the 12th day of April in the year Nineteen Hundred and
Ninety Nine between NaviSite, Inc., 100 Brickstone Square, Andover, MA 01810
(the "Tenant") and Gilbane Building Company, 7 Jackson Walkway, Providence,
      ------
Rhode Island, (the "Construction Manager"), for services in connection with the
                    --------------------
project described on Exhibit - A attached hereto (the "Project"), including,
                     -----------                       -------
without limitation, the following: Tenant fit up of the first floor data Center
and MEP support space and with associated infrastructure (rooftop equipment,
generators located at concrete pads on grade, etc.) at 400 Minuteman Drive,
Andover, MA 01810, a building of approximately 150 thousand square feet and
presently under construction, owned by 400 River Limited Partnership, 2101
Rosecrans Boulevard, Suite 5252, El Segundo, CA 90245, hereinafter referred to
as the "Landlord".
        --------

The Tenant and the Construction Manager agree as set forth below:
The General Conditions estimate for the project is as per the attached Exhibit -
                                                                       ---------
B dated 4/12/99 (the "General Conditions Estimate").
-                     ---------------------------
The Architect/Engineer for the Project are:

     .    Tenant Architect, Visnick & Caulfield, 334 Boylston Street, Boston, MA
          02116

     .    Architect of Record, Burt Hill Kosar Rittleman Associates, 650
          Smithfield Street, Suite 2600, Pittsburgh, PA 15222-3907

     .    Engineer, HF Lenz Company, 1407 Scalp Avenue, Jonestown, PA 15904-3329

                                                                               1
<PAGE>

ARTICLE 1
---------

The Construction Team and Extent of Agreement
---------------------------------------------

The CONSTRUCTION MANAGER accepts the relationship of trust and confidence
established between him and the Tenant by this Agreement.  He covenants with the
Tenant to furnish his best skill and judgment and to cooperate with the
Architect/Engineer in furthering the interests of the Tenant.  He agrees to
furnish efficient business administration and superintendence and to use his
best efforts to complete the Project in an expeditious and economical manner
consistent with the interest of the Tenant.

1.1  The Construction Team:  The Construction Manager and the Tenant, and the
Architect/Engineer called the "Construction Team" shall work from the beginning
of design through construction completion.  The Construction Manager shall
provide leadership to the Construction Team on all matters relating to
construction.

1.2  Extent of Agreement:  This Agreement represents the entire agreement
between the Tenant and the Construction Manager and supersedes all prior
negotiations, representations or agreements.  When Drawings and Specifications
are complete, they shall be incorporated herein by amendment to this Agreement.
This Agreement shall not be superseded by any provisions of the plans and
specifications and may be amended only by written instrument signed by both the
Tenant and the Construction Manager.

1.3  Definitions:  The Project is the total tenant fit out and associated
infrastructure and improvements to be performed under this Agreement. The Work
is that part of the Project that a particular Trade Contractor (or Construction
Manager's own forces) is to perform.  The term "day" shall mean calendar day
unless otherwise specifically designated.

1.4  Contract Documents.  The Contract Documents consist of this Agreement,
Drawings, Specifications, addenda issued prior to execution of this Agreement,
the other documents listed in this Agreement and written modifications issued
after execution after this Agreement.  In the event of a conflict among the
Contract Documents, the Contract Documents shall be construed according to the
following priorities:

               First:         Modifications
               Second:        This Agreement
               Third:         Addenda
               Fourth:        Drawings - As per attached Exhibit A
               Fifth:         Specifications

ARTICLE 2
---------

Construction Manager's Services
-------------------------------

The Construction Manager will perform the following services under this
Agreement in each of the two phases described below.

2.1   Design Phase (A part of the Construction Phase as pertains to Gilbane cost
outlined in Exhibit B).

2.1.1 Consultation During Project Development:  Schedule and attend regular
meetings with the Architect/Engineer during the development of conceptual and
preliminary design to advise on site use and improvements, selection of
materials, building systems and equipment.  Provide recommendations on
construction feasibility, availability of materials and labor, time requirements
for installation and construction, and factors related to cost, including costs
of alternative designs or materials, preliminary budgets and possible economies.

2.1.2 Scheduling:  Develop a Project Time Schedule that coordinates and
integrates the Architect's/Engineer's design efforts with construction
schedules. Update the Project Time schedule on a monthly basis, incorporating a
detailed schedule for the construction operations of the Project, including
realistic activity sequences and durations, allocation of labor and materials,
processing of shop drawings

                                                                               2
<PAGE>

and samples, and delivery of products requiring long lead time procurement.
Include the Tenant's occupancy requirements showing portions of the Project
having occupancy priority.

2.1.3    Project Construction Budget:  Prepare a Project budget as soon as major
Project requirements have been identified, and update periodically for the
Tenant's approval.  Update and refine the budget on a monthly basis for the
Tenant's approval and advise the Tenant if it appears that the Project
Construction budget will not be met and make recommendations for corrective
action.  The Construction Manager will evidence a good faith effort to provide
his service within the budget outlined in Exhibit B.

2.1.4    Coordination of Construction Documents:  Review the Drawings and
Specifications as they are being prepared, recommending alternative solutions
whenever design details affect construction feasibility or schedule without,
however, assuming any of the Architect/Engineer's responsibilities for design.

2.1.5    Construction Planning:  Recommend for purchase and expedite the
procurement of long lead items to ensure their delivery by the required date

2.1.5.1  Make recommendations to the Tenant and the Architect/Engineer regarding
the division of Work in the Drawings and Specifications to facilitate the
bidding and awarding of Trade Contracts, allowing for phased construction and
taking into consideration such factors as time of performance, availability of
labor, overlapping trade jurisdictions, and provisions of temporary utilities.

2.1.5.2  Review the Drawings and Specifications with the Architect/Engineer to
eliminate areas of conflict and overlapping in the Work to be performed by the
various Trade Contractors and prepare pre-qualification criteria for bidders.

2.1.5.3  Develop Trade Contractor interest in the Project and as working
Drawings and Specifications are completed, take competitive bids on the Work of
the various Trade Contractors.  After analyzing the bids, recommend to the
Tenant that such contracts be awarded after Tenant approval.  Exceptions to the
Bid process may be required so as to meet the Project schedule via negotiation
with key Trade Contractors.

2.1.6    Equal Employment Opportunity:  Determine applicable requirements for
equal employment opportunity programs for inclusion in the bidding documents.

2.2  Construction Phase
     ------------------

2.2.1    Project Control:  Monitor the Work of the Trade Contractors and
coordinate the Work with the activities and responsibilities of the Tenant,
Architect/Engineer, and Construction Manager to complete the Project in
accordance with the Tenant's objectives of cost, time and quality.

2.2.1.1  Maintain a competent full-time staff at the Project site to coordinate
and provide general direction of the Work and progress of the Trade Contractors
on the Project.

2.2.1.2  Establish on-site organization and lines of authority in order to carry
out the overall plans of the Construction Team.

2.2.1.3  Establish procedures for coordination among the Tenant, Landlord,
Architect/Engineer, Trade Contractors and Construction Manager with respect to
all aspects of the Project and implement such procedures.

2.2.1.4  Schedule and conduct weekly progress meetings at which Trade
Contractors, Tenant, Landlord, Architect/Engineer and Construction Manager can
discuss jointly such matters as procedures, progress, problems and scheduling.
Construction Manager shall publish meeting minutes and distribute copies of same
to all applicable parties.

2.2.1.5  Provide regular weekly monitoring of the schedule as construction
progresses.  Identify potential variances between scheduled and probable
completion dates.  Review schedule for Work not started or incomplete and
recommend to the Tenant and Trade Contractors adjustments in the schedule to
meet the

                                                                               3
<PAGE>

probable completion date. Provide summary reports of each monitoring and
document all changes in schedule.

2.2.1.6  Determine the adequacy of the Trade Contractors' personnel and
equipment and the availability of materials and supplies to meet the schedule.
Recommend courses of action to the Tenant when requirements of a Trade Contract
are not being met.

2.2.2    Physical Construction:  Provide all labor, materials, construction
equipment, tools and subcontract items which are necessary for the completion of
the Project which are not provided by either the Trade Contractors or the
Tenant.  Construction Manager shall supervise the Work of all Trade Contractors
and Construction Manager's own forces, and shall use good faith efforts to
coordinate such Work with the work of any of Tenant's separate contractors, so
as to complete the Project in a manner which will meet the Project Schedule and
the Project Budget.

2.2.3    Cost Control:  Develop and monitor an effective system of Project cost
control.  Revise and refine the initially approved Project Construction Budget,
incorporate approved changes as they occur, and develop cash flow reports and
forecasts as needed.  Identify variances between actual and budgeted or
estimated costs on a monthly basis, and advise Tenant whenever projected cost
exceeds budgets or estimates.

2.2.3.1  Maintain cost accounting records on authorized Work performed under
unit costs, actual costs for labor and material, or other bases requiring
accounting records.  Afford the Tenant access to these records and preserve them
for a period of three (3) years after final payment.

2.2.4    Change Orders:  Develop and implement a system for the preparation,
review and processing of Change Orders reasonably acceptable to Tenant.
Recommend necessary or desirable changes to the Tenant and the
Architect/Engineer, review requests for changes, submit recommendations to the
Tenant and the Architect/Engineer and assist in negotiating Change Orders.

2.2.5    Payments to Trade Contractors:  Develop and implement a procedure
reasonably acceptable to Tenant for the review, processing and payment of
applications by Trade Contractors for progress and final payments.

2.2.6    Permits and Fees:  Assist the Tenant and Architect/Engineer in
obtaining all permits and approvals pertinent to the construction of the
Project, including, without limitation, building permits and certificates of
occupancy, but excluding permits for inspection or temporary facilities required
to be obtained directly by the various Trade Contractors. Assist in obtaining
permits and approvals from all the authorities having jurisdiction.

2.2.7    Tenant's Consultants:  If required, assist the Tenant in selecting and
retaining professional services of a surveyor, testing laboratories and special
consultants, and coordinate these services, without assuming any responsibility
or liability of or for these consultants.

2.2.8    Inspection:  Inspect the Work of Trade Contractors for defects and
deficiencies in the Work without assuming any of the Architect/Engineer's
responsibilities for inspection under the Architect/Engineer's contracts with
Tenant.

2.2.8.1  Review the safety programs of each of the Trade Contractors and make
appropriate recommendations.  In making such recommendations and carrying out
such reviews, he shall not be required to make exhaustive or continuous
inspections to check safety precautions and programs in connection with the
Project.  The performance of such services by the Construction Manager shall not
relieve the Trade Contractors of their responsibilities for the safety of
persons and property, and for compliance with all federal, state and local
statutes, rules, regulations and orders applicable to the conduct of the Work.

2.2.9    Document Interpretation:  Refer all questions for interpretation of the
documents prepared by the Architect/Engineer to the Architect/Engineer.

                                                                               4
<PAGE>

2.2.10   Shop Drawings and Samples:  In collaboration with the
Architect/Engineer, establish and implement procedures for expediting the
processing and Architect/Engineer approval of shop drawings, samples, and other
submittals. Receive from the Trade Contractors and review all such submittals,
coordinate them with the information contained in related documents, and
transmit them to the Architect/Engineer for its approval.

2.2.11   Reports and Project Site Documents:  Record the progress of the
Project. Submit written progress reports to the Tenant, on a monthly basis,
including information on the Trade Contractors' Work, and the percentage of
completion. Keep a daily log available to the Tenant.

2.2.11.1 Maintain at the Project site, on a current basis:  records of all
necessary Contracts, Drawings, samples, purchases, materials, equipment,
maintenance and operating manuals and instructions, and other construction
related documents, including all revisions.   Obtain data from Trade Contractors
and maintain a current set of record Drawings, Specifications and operating
manuals.  At the completion of the Project, deliver all such records to the
Tenant.

2.2.12   Substantial Completion:  Upon Substantial Completion of the Work or
designated portions thereof, as determined by Architect/Engineer, determine and
prepare for the Tenant a list of incomplete or unsatisfactory items and a
schedule for their completion and a schedule of values for the cost to complete
each such item.  Construction Manager shall assist Tenant and Architect/Engineer
in determining the date of Substantial Completion of the Work or designated
portions thereof.

2.2.13   Start-Up: With the Tenant's maintenance personnel, direct the checkout
of utilities, operations systems and equipment for readiness and assist in their
initial startup and testing by the Trade Contractors.

2.2.14   Final Completion:  Provide written notice to the Tenant that the Work
is ready for final inspection and assist Tenant and Architect/Engineer in
determining the date of final completion of the Project. Secure and transmit to
the Tenant all guarantees, warranties, affidavits, releases, bonds and waivers
required by the Contract Documents, applicable law or Tenant. Turn over to the
Tenant all keys, manuals, record drawings, and maintenance stocks.

2.2.15   Warranty: Where any Work is performed by the Construction Manager's own
forces or by Trade Contractors under contract with the Construction Manager, the
Construction Manager shall, and does hereby, warrant that all materials and
equipment included in such Work will be new, unless otherwise specified, and
that such Work will be of good quality, free from improper workmanship and
defective materials and in conformance with the Drawings and Specifications.
With respect to the same Work, the Construction Manager shall correct all Work
defective in material or workmanship for a period of one year from the Date of
Substantial Completion or for such longer periods of time as may be set forth
with respect to specific warranties contained in the trade sections of the
Specifications. If Construction Manager corrects (or causes any Trade Contractor
to correct) any defective Work, then the one year corrective work period
(specific to that area of defective Work or the specific defective part) shall
be extended for an additional one (1) year with respect to such Work from the
date of correction thereof; provided, however, that the corrective work period,
as so extended, shall not exceed two years from the Date of Substantial
Completion or such later date as may be set forth with respect to specific
warranties contained in the trade sections of the Specifications. The
Construction Manager shall collect and deliver to the Tenant any specific
written warranties given by others.

2.2.16   The Construction Manager shall not be responsible for the removal,
encapsulation, transportation, and disposal of any hazardous material, including
without limitation, any asbestos or asbestos-related products as may be required
in connection with the Project, except for any such hazardous materials as may
be brought onto the Project site by Construction Manager.  Construction Manager
shall notify Tenant prior to Construction Manager or any Trade Contractor
bringing any such hazardous materials on to the Project site, and shall notify
Tenant immediately upon discovery of any such hazardous materials on the Project
site.

2.3      Additional Services

                                                                               5
<PAGE>

2.3.1  At the request of the Tenant,  the Construction Manager will provide the
following additional services upon written agreement between the Tenant and
Construction Manager defining the extent of such additional services and the
amount and manner in which the Construction Manager will be compensated for such
additional services.

2.3.2  Notwithstanding the provisions of this paragraph 2.3.2, there shall be
included in the basic services of a Construction Manager hereunder such
investigation, appraisal, or valuation of existing conditions, facilities or
equipment as would be reasonably expected of a construction manager who is
providing construction management services for the construction of the base
building for the Landlord, and no additional compensation (beyond the
Construction Manager's fee) shall be due or payable in connection therewith.

2.3.3  Services related to Tenant furnished equipment, furniture and furnishings
which are not a part of this Agreement

2.3.4  Services for Tenant or rental spaces not a part of this agreement.

2.3.5  Obtaining or training maintenance personnel or negotiation maintenance
service contracts.

ARTICLE 3
---------

Tenant's Responsibilities
-------------------------

3.1    The Tenant shall provide full information regarding his requirements for
the Project.

3.2    The Tenant shall designate in writing a representative who shall be fully
acquainted with the Project and has authority to issue and approve Project
Construction Budgets, issue Change Orders, render decisions promptly and furnish
information expeditiously.  Any limitations of the foregoing shall be indicated
to the Construction Manager in writing.

3.3    The Tenant shall retain an Architect/Engineer for design and to prepare
construction documents for the project.  The Architect/Engineer's services,
duties and responsibilities are described in the agreement between the Tenant
and the Architect/'Engineer, a copy of which will be forwarded to the
Construction Manager.

3.4    Section Deleted.

3.5    The Tenant shall provide auditing services as he may require.

3.6    The Construction Manager will be furnished without charge all copies of
Drawings and Specifications reasonably necessary for the execution of the Work.

3.7    The Tenant shall provide the insurance for the Project as provided in
Paragraph 12.4, and shall bear the cost of any bonds required by Tenant or any
permit granting authority in connection with the Work of the Project.

3.8    The services, information, surveys and reports required by the above
paragraphs or otherwise to be furnished by other consultants employed by the
Tenant, shall be furnished with reasonable promptness at the Tenant's expense
and the Construction Manager shall be entitled to reasonably rely upon the
accuracy and completeness thereof.

3.9    If the Tenant becomes aware of any fault or defect in the Project or non-
conformance with the Drawings and Specifications, he shall give prompt written
notice thereof to the Construction Manager who shall promptly cure such defect.

3.10   It shall be a condition of Construction Manager's obligations hereunder
that:

     (i) until such time as the closing of the sale of shares of common stock of
         Tenant in a public

                                                                               6
<PAGE>

          offering pursuant to an effective registration statement under the
          securities Act of 1933, as amended, shall have occurred (an "IPO"),
          the Guaranty of CMGI, Inc. attached hereto shall remain in full force
          and effect; and

     (ii) from and after the date of the IPO, Tenant shall deliver a letter of
          credit in form and substance reasonably satisfactory to Tenant and
          Construction Manager in an amount equal to the amount which Tenant and
          Construction Manager reasonably estimate to be necessary to complete
          the Project (the "Estimated Contract Balance"). Tenant shall have
                            --------------------------
          the right, from time to time, to reduce the amount of the letter of
          credit as the work progresses and the estimated Contract Balance
          declines, and to deliver replacement letters of credit in such reduced
          amounts. Tenant shall also have the right to substitute other security
          in lieu of a letter of credit, including, without limitation, a
          guaranty from CMGI, Inc., provided that such security is satisfactory
          to Construction Manager in its reasonable discretion.

3.11  The Tenant shall communicate with the Trade Contractors only through the
Construction Manager.  This Article shall be void and of no force or effect upon
the termination of this Agreement in accordance with the terms hereof.

3.12  Tenant shall use good faith efforts to identify Gilbane as the
Construction Manager on all public statements and releases in connection with
the Project, including issuance of photographs, renderings, and the like for all
media, as and when appropriate.

ARTICLE 4
---------

Trade Contracts
----------------

4.1   All portions of the Project that the Construction Manager does not perform
with his own forces shall be performed under Trade Contracts.  The Construction
Manager shall request and receive proposals from Trade Contractors and Trade
Contracts will be awarded after the proposals are reviewed by the Construction
Manager and approved by Tenant.

4.2   If the Tenant refuses to accept a Trade Contractor recommended by the
Construction Manager, the Construction Manager shall recommend an acceptable
substitute.  The Construction Manager shall not be required to contract with
anyone to whom he has made a reasonable objection.

4.3   Trade Contracts will be between the Construction Manager and the Trade
Contractors.  The form of the Trade Contracts including the General and
Supplementary Conditions shall be satisfactory to the Construction Manager and
Tenant, and copies of each Trade Contract shall be provided to the Tenant.
Without limitation of the foregoing, all Trade Contracts shall include a
provision pursuant to which the applicable Trade Contractor shall agree to
recognize Tenant as the "owner" thereunder upon written notice from Tenant that
Tenant has terminated this Agreement and elected to assume the applicable Trade
Contract.

4.4   The Construction Manager shall be responsible to the Tenant for the acts
and omissions of his agents and employees, Trade Contractors performing Work
under a contract with the Construction Manager, and such Trade Contractors'
agents and employees.

ARTICLE 5
---------

Schedule
--------

5.1   The services to be provided under this Contract shall be in general
accordance with the following schedule:

<TABLE>
<S>                  <C>                               <C>
Design Phase:        Commencing  4/12/99               Ending: on or about 6/15/99
-------------

Construction Phase:  Commencing on or about 6/15/99    Ending: on or about 1/7/00
-------------------
</TABLE>

                                                                               7
<PAGE>

5.2    Section Reserved

5.3    The Date of Substantial Completion of the Project or a designated portion
thereof is the date certified by Architect/Engineer when (i) construction is
sufficiently complete in accordance with the Drawings and Specifications so the
Tenant can occupy or utilize the Project or designated portion thereof for the
use for which it is intended with a minimum of interference by Construction
Manage and the Trade Contractors and is complete with the exception of punch
list items of a minor nature (having an aggregate value of less than $25,000)
and (ii) Construction Manager has supplied Tenant with a certificate of
occupancy or an equivalent use or occupancy permit issued by the building
inspector within the municipality where the Project is located.  Guarantees and
warranties called for by this Agreement or by the Drawings and Specifications
shall commence on the Date of Substantial Completion of the Project or
designated portion thereof, or such later date as may be specified in the
Specifications with respect to any applicable Trade Contractor or supplier.
Should the Construction Manager be unable to secure the certificate of occupancy
due to acts or omissions of the Tenant or its Architect/Engineer which are not
cured within seven days after written notice from the Construction Manager
specifying such acts or omissions in reasonable detail, then such delay shall
entitle the Construction Manager to the benefits allowed under Subparagraphs 5.4
and 7.2.2.

5.4    Subject to the provisions of Section 9.2.1., if the Construction Manager
is delayed at any time in the progress of the Project by any act or neglect of
the Tenant or the Architect/Engineer or by any employee of either, or by any
separate contractor employed by the Tenant, or by changes ordered in the
Project, or by labor disputes, fire, unusual delay in transportation, adverse
weather conditions not reasonably anticipated, unavoidable casualties or any
causes beyond the Construction Manager's control, the Substantial Completion
Date shall be extended by a written modification signed by Tenant and
Construction Manager for a reasonable length of time.

ARTICLE 6
---------

Article Reserved

ARTICLE 7
---------

Construction Manager's Fee
--------------------------

7.1    In consideration of the performance of the Contract, the Tenant agrees to
pay the Construction Manager in current funds as compensation for his services a
Construction Manager's Fee as set forth in Subparagraphs 7.1.1 and 7.1.2.

7.1.1  For the performance of the Design Phase services, the Construction
Manager's fee shall be included in the Construction Phase fee.

7.1.2  For work or services performed during the Design and Construction Phase,
a lump sum fee of  $250,000 which shall be paid proportionately to the ratio
which the monthly payment for the Cost of the Project bears to the estimated
cost of the Project, as set forth in the Project Budget, as the same may be
adjusted from time to time upon approval by Tenant.   Any balance of this fee
shall be paid at the time of final payment.

7.2    Adjustments in fee shall be made as per Article 7.2.1 only if the
parameters of the scope of the Work expand materially beyond that which is
outlined in, contemplated by or reasonably inferable from, Exhibit A by Change
Order and/or if circumstances which were not reasonably foreseeable and which
are beyond the control of the Construction Manager require an extension of the
Construction Manager's service beyond the date of 1/28/00 which is the date of
cost projection outlined in Exhibit B provided that the Construction Manager
gives Tenant notice of such circumstances within seven days after the occurrence
thereof.  Notwithstanding the foregoing or any other provision of the Agreement,
Construction Manager shall not be entitled to any increase in Construction
Manager's Fee or payment for general conditions costs or other compensation
hereunder to the extent that additional time to complete the Project beyond
1/28/00, as adjusted pursuant to Paragraph 5.4, is required due to any
negligence or default of Construction Manager.

                                                                               8
<PAGE>

7.2.1   For changes in the Project as provided for in Article 9, the
Construction Manager's fee shall be adjusted by an amount equal to $1.50 per
each $1.00 of Construction Manager's direct labor cost (both Regional Labor and
Field Labor), plus the total cost of any Regional Labor and Regional Support
cost(s) as may be required to administer the change. A sample calculation is
attached hereto as Schedule 7.2.1.
                   --------------

7.2.2   For delays in the Project not the responsibility of the Construction
Manager as defined in Paragraph 5.4, there will be an equitable adjustment in
the fee and general conditions costs to compensate the Construction Manager for
its increased expenses, if any.

7.3     Included in the Construction Manager's Fee are the following:

7.3.1   Salaries or other compensation of the Construction Manager's employees
at the principal office and branch offices, except employees listed in
Subparagraph 8.2.2.

7.3.2   General operating expenses of the Construction Manager's principal and
branch offices other than the field office.

7.3.3   Any part of the Construction Manager's capital expenses, including
interest on the Construction Manager's capital employed for the project.

7.3.4   Overhead or general expenses of any kind, except as may be expressly
included in Article 8.

7.3.5   Regional Labor and Regional Support as outlined in Exhibit B.
                                                           ---------

ARTICLE 8
---------

Cost of the Project
-------------------

8.1     The term Cost of the Project shall mean charges for services provided by
the Construction Manager and costs necessarily incurred in the Project during
either the Design or Construction Phase, and paid by the Construction Manager.

8.1.1   The Tenant agrees to pay the Construction Manager for the Cost of the
Project as defined in Article 8. Such payment shall be in addition to the
Construction Manager's Fee stipulated in Article 7.

8.2     Cost Items

8.2.1   Section Reserved.

8.2.2   Charges for services provided by the Construction Manager's employees
based on:

8.2.2.1 Direct Personnel Expense of those employees stationed at the field
office, in whatever capacity employed,  as per Exhibit B.
                                               ---------

8.2.2.2 Section Reserved.

8.2.2.3 Direct Personnel Expense is defined as the direct salaries of the
Construction Manager's employees engaged in performing the services under this
Agreement as described in Subparagraphs 8.2.2.1 and the cost of all employee
fringe benefits, including, without limitation, medical and workers'
compensation insurance, absences, vacations, pension and/or profit sharing, all
in accordance with the Construction Manager's standard personnel policy, and
taxes for such items as unemployment compensation and social security, as per
Exhibit B.
---------

8.2.3   Section Reserved.

8.2.4   Reasonable transportation, traveling, moving, temporary subsistence and
hotel expenses of the Construction Manager or of his officers or employees
incurred in discharge of duties connected with the

                                                                               9
<PAGE>

Project, all in accordance with the Construction Manager's standard personnel
policy; provided that such expenses are approved in advance by Tenant.

8.2.5   Cost of all materials, supplies and equipment incorporated in the
Project, including costs of transportation and storage thereof.

8.2.6   Payments made by the Construction Manager to Trade Contractors for their
Work performed pursuant to contract under this Agreement, including the cost of
any Trade Contractor payment and performance bonds.

8.2.7   Cost, including transportation and maintenance, of all materials,
supplies, equipment, vehicles, and temporary facilities, which are employed and
consumed in the performance of the Work, and cost less salvage value on such
items used but not consumed which remain the property of the Construction
Manager.

8.2.8   Rental charges of all necessary machinery and equipment, exclusive of
hand tools, used at the site of the Project, whether rented from the
Construction Manager or others, including installation, repairs and
replacements, dismantling, removal, costs of lubrication, transportation and
delivery costs thereof, at rental charges consistent with those prevailing in
the area.

8.2.9   Cost of the premiums for all insurance and bonds which the Construction
Manager is required to procure by this Agreement or is deemed necessary by the
Construction Manager and approved by Tenant.

8.2.10  Sales, use, gross receipts or similar taxes related to the Project
imposed by any governmental authority, and for which the Construction Manager is
liable.

8.2.11  The Construction Manager is not required to indemnify for patent
infringement as may be caused by the design documents of the Architect/Engineer,
except to the extent that Construction Manager knew that the applicable
material, equipment or technique infringed upon the patent rights of any third
party and failed to notify Tenant and Architect/Engineer prior to the
installation or procurement thereof.

8.2.12  Losses, expenses or damages to the extent not compensated by insurance
or otherwise, including settlement of Trade Contractor claims or suits with
prior Tenant written approval.

8.2.13  In repairing or correcting damaged or nonconforming Work executed by the
Construction Manager or the Construction Manager's Trade Contractors or
suppliers, provided that such damaged or nonconforming Work was not caused by
the negligence or failure to fulfill a specific responsibility to the Tenant set
forth in this Agreement of the Construction Manager or the Construction
Manager's foremen, engineers or superintendents, or other supervisory,
administrative or managerial personnel of the Construction Manager, or the
failure of the Construction Manager's personnel to supervise the Work of the
Trade Contractors or suppliers, and only to the extent that the cost of repair
or correction is not recoverable by the Construction Manager from insurance,
Trade Contractors or suppliers.

8.2.14  Project expenses such as telegrams, long-distance telephone calls,
telephone service at the site, expressage, printing, reproduction and similar
items, as per Exhibit B.
              ---------

8.2.15  Cost of removal of all debris.

8.2.16  Cost incurred due to an emergency affecting the safety of persons and
property except to the extent such emergency is caused by the negligence of the
Construction Manager.

8.2.17  Cost of supplies for job site computer.

8.2.18  Cost of corporate and regional data processing/MIS services billable at
an hourly rate of $2.00 per hour times the labor hours (jobsite only) expended
for the Project,  as per Exhibit B.
                         ---------

                                                                              10
<PAGE>

8.2.19  Legal costs reasonably and properly incurred by the Construction Manager
in the discharge of its duties under this Agreement with prior Tenant written
approval which shall not be unreasonably withheld provided that such costs do
not arise from any default by the Construction Manager of its obligations
hereunder or under any contract or agreement with any Trade Contractor or
supplier, or any fault of Construction Manager relating to any permit or
approval.

8.2.20  Cost of storage of Project records beyond Project completion, as per

Exhibit B.
---------

8.2.21  Section Reserved.

8.2.22  All costs directly, reasonably and properly incurred in the performance
of the Project and not included in the Construction Manager's Fee as set forth
in Paragraph 7.3, subject to Tenant's prior written approval which shall not be
unreasonably withheld.

8.3 Section Reserved.

8.4  The Cost of the Project shall not include:

        .1  Cost due to the negligence of Construction Manager or to the failure
            of Construction Manager to fulfill a specific responsibility to
            Tenant set forth in the Contract Documents.

        .2  Fines, penalties, sanctions or impositions assessed or imposed by
            any governmental body, instrumentality or tribunal to the extent
            arising from any act or omission of Construction Manager or any
            Trade Contractor.

        .3  Costs associated with Construction Manager's failure to obtain any
            and all permits in a timely manner, including without limitation,
            the costs of any delays resulting therefrom, unless such failure is
            due to the failure of the Drawings and Specifications to conform
            with the laws and regulations applicable thereto.

        .5  Costs of accelerating the Work to the extent caused by the
            negligence or default of Construction Manager.

        .6  Costs resulting from the failure of Construction Manager or any
            Trade Contractor to procure and maintain insurance as required by
            the Contract Documents.

        .7  Overtime required to the extent caused by the negligence or fault of
            Construction Manager.

        .8  Project incentive bonuses, except as approved in advance by Tenant
            in writing.

        .9  Cost of bonding or securing liens or defending claims filed by any
            Trade Contractor or supplier arising from any default by
            Construction Manager in making any payment due to any such Trade
            Contractor or supplier, unless such default by Construction Manager
            is due to a default by Tenant in making progress payments to
            Construction Manager hereunder.

        .10 Losses or expenses for which Construction Manager is compensated by
            insurance.

ARTICLE 9
---------

Changes in the Project
----------------------

9.1.1   The parties hereby acknowledge the Project is being designed and built
on a so-called "fast track" basis. As such, the Drawings and Specifications are
not complete as of the date hereof. The development of the Drawings and
Specifications may require multiple rounds of drafting, review, comments,
changes and modifications. The Project Construction Budget and the Project
Schedule (including the date of Substantial Completion) shall be subject to
adjustment in connection with such

                                                                              11
<PAGE>

changes and modifications to the Drawings and Specifications. However, subject
to the provisions of Section 9.1.2 and 9.1.3 below, no such change or and
modification to the Drawings and Specifications shall constitute (or require) a
"Change Order" or entitle Construction Manager to any claim for an adjustment to
Construction Manager's fee, notwithstanding whether any such change or
modification requires alteration, removal, replacement or reperformance of Work
which has been completed provided the Work requested is within the parameters of
the scope of the Work outlined in, contemplated by or reasonably inferable from
Exhibit A and that the Work can be completed by the date of 1/28/00, which is
the date of cost projection outlined in Exhibit B and which date is subject to
extension to the extent not caused by or resulting from any negligence or
default of the Construction Manager. Should the "Change Order" be materially
different than the scope of Work outlined in, contemplated by or reasonably
inferable from Exhibit A and/or should the Change Order cause an extension of
Construction Manager service beyond the date of 1/28/00 (as the same may be
extended as aforesaid), but subject to the provisions of Section 7.2 hereof, the
Construction Manager will provide a revised Exhibit B for the cost of the
administration of the change with a fee calculation as per the terms of Article
7.2.1.

9.1.2  A "Change Order" is a written order to the Construction Manager signed by
the Tenant or his authorized agent issued after the execution of this Agreement
and the finalization of any applicable Drawings and Specifications, authorizing
a Change in the Project or the method or manner of performance and/or an
adjustment in the Project Construction Budget, the Construction Manager's fee or
the Substantial Completion Date. Trade Contractors shall be entitled to
adjustment of their fees and costs for Change Order work in accordance with the
terms of their respective Trade Contracts. The Construction Manager shall be
entitled to compensation for all Costs of the Project incurred by Construction
Manager in connection with the applicable Change Order work as per the
parameters outlined in Section 9.1.1 above.

9.1.3  Should (i) concealed conditions encountered in the performance of the
Work below the surface of the ground, or (ii) concealed or unknown conditions in
any existing structure which are at variance with the conditions indicated by
the Drawings, Specifications, or Tenant furnished information, or (iii) unknown
physical conditions below the surface of the ground or concealed or unknown
conditions in an existing structure which are of an unusual nature, differing
materially from those ordinarily encountered and generally recognized as
inherent in work of the character provided for in this Agreement be encountered,
then, to the extent that such conditions were not reasonably foreseeable by
Construction Manager, the Project Construction Budget and the Substantial
Completion Date shall be equitably adjusted by Change Order upon claim by either
party made within seven (7) days after the date of discovery of the applicable
condition (provided, however, that Construction Manager's fee shall not be
increased except to the extent that the applicable condition results in a delay
in the date of Substantial Completion, in which case Construction Manager's fee
shall be equitably adjusted). No such claim shall be valid unless so made. Any
change in the Project Construction Budget or the Substantial Completion Date or
Construction Manager's fee resulting from such claim shall be authorized only by
Change Order.

9.2    Claims for Additional Cost or Time
       ----------------------------------

9.2.1  If the Construction Manager wishes to make a claim for an extension in
the Substantial Completion Date, he shall give the Tenant written notice thereof
within seven (7) days time after the occurrence of the event giving rise to such
claim. This notice shall be given by the Construction Manager before proceeding
to execute any Work, except in an emergency endangering life or property in
which case the Construction Manager shall act, at his discretion, to prevent
threatened damage, injury or loss. Claims arising from delay shall be made
within seven (7) days time after the delay. No such claim shall be valid unless
so made. Any change in the Project Construction Budget or Substantial Completion
Date resulting from such claim shall be authorized by Change Order.

9.3    Minor Changes in the Project
       ----------------------------

9.3.1  The parties hereby acknowledge and agree that no Change Order shall be
valid or effective unless signed by Tenant.

9.4    Emergencies
       -----------

                                                                              12
<PAGE>

9.4.1  In any emergency affecting the safety of persons or property, the
Construction Manager shall act, at his discretion, to prevent threatened damage,
injury or loss. Any extension of time claimed by the Construction Manager on
account of emergency work shall be determined as provided in this Article.

ARTICLE 10
----------

Discounts
---------

All discounts for prompt payment shall accrue to the Tenant to the extent the
Cost of the Project is paid directly by the Tenant or from a fund made available
by the Tenant to the Construction Manager for such payments. All trade
discounts, rebates and refunds, and all returns from sale of surplus materials
and equipment, shall be credited to the Cost of the Project.

ARTICLE 11
----------

Payments to the Construction Manager
------------------------------------

11.1   The Construction Manager shall submit monthly to the Tenant and
Architect/Engineer a statement, sworn to if required, showing all moneys paid
out, costs accumulated or costs incurred on account of the Cost of the Project
during the previous month and the amount of the Construction Manager's Fee due
as provided in Article 7. Construction Manager shall coordinate monthly
requisition meetings and delivery of monthly requisitions with the meeting and
requisition schedule for the work being performed by Construction Manager for
Landlord. Each monthly requisition shall be accompanied by lien waivers from
each Trade Contractor and Construction Manager (for the previous months billing
except that final lien waivers shall be required for release of retainage and
final payment to any Trade Contractor or Construction Manager) in the statutory
form, and such other invoices, receipts and supporting documentation as Tenant
or Architect/Engineer may reasonably request. Payment by the Tenant to the
Construction Manager less retainage as hereinafter provided, shall be made
within thirty (30) days after it is submitted. The Tenant shall withhold from
each monthly payment an amount equal to ten percent (10%) on account of each
Trade Contractor's payment. At such time as each Trade Contractor's Work is
fifty percent (50%) complete, no further retainage will be withheld, provided,
in the Tenant's and the Construction Manager's opinions, the Trade Contractor is
performing satisfactorily. The Construction Manager will be paid one hundred
percent (100%) of its direct costs and fee earned to the billing date.

11.1.1 The Construction Manager shall maintain detailed statements, including
without limitation, payroll records, receipted invoices, check vouchers, and any
other evidence demonstrating costs incurred by the Construction Manager on
account of the Cost of the Project, which records shall be available for the
Tenant's examination during regular business hours.

11.2   Within thirty (30) days after the date of Substantial Completion of the
Work, Tenant shall release the retainage held by Tenant with respect to the Cost
of the Project, less an amount equal to 200% of the estimated cost of completing
any unfinished punchlist items, provided that said unfinished items are listed
separately and the estimated cost of completing any unfinished items likewise
listed separately. Thereafter, Tenant shall pay to Construction Manager, within
thirty (30) days of the Construction Manager's invoice, the amount retained for
incomplete items as each of said items is completed.

11.3   The Construction Manager shall pay all the amounts due Trade Contractors
or other persons with whom he has a contract within seven (7) days after receipt
of any payment from the Tenant, the application for which includes amounts due
such Trade Contractor or other persons. Before issuance of final payment, the
Construction Manager shall submit to Tenant satisfactory evidence that all
payrolls, materials bills and other indebtedness connected with the Project have
been paid or otherwise satisfied, together with final lien waivers from each
Trade Contractor and Supplier.

11.4   If the Tenant should fail to pay the Construction Manager within seven
(7) days after the time the payment of any amount becomes due, then the
Construction Manager may, upon seven (7) additional days' written notice to the
Tenant and the Architect/Engineer, stop the Project until payment of the amount
owing has been received.

                                                                              13
<PAGE>

11.5  Payments due but unpaid shall bear interest at the rate of one percent
above the Fleet/Norstar Bank prime rate prevailing on the date payment was due.

11.6  In the event a lien or notice of contract is filed or claimed against the
Project site by any Trade Contractor, laborer or supplier of materials, the
Construction Manager shall immediately bond such lien or cause such lien to be
discharged. Any payment due Construction Manager hereunder shall be reduced by
an amount up to one hundred fifty percent (150%) of the amount of any such lien
until such lien is removed as of record and/or bonded.

ARTICLE 12
----------

Insurance, Indemnity and Waiver of Subrogation
----------------------------------------------

12.1  Indemnity

12.1.1   The Construction Manager agrees to indemnify and hold the Tenant and
the Landlord harmless from all claims for bodily injury and property damage
(other than the damage or loss to the Work itself and other property insured
under Paragraph 12.4) that may arise from the Construction Manager's or any
Trade Contractor's operations under this Agreement.

12.1.2   The Tenant shall cause any other contractor who may have a contract
with the Tenant to perform construction or installation work in the areas where
Work will be performed under this Agreement, to agree to indemnify the Tenant,
the Construction Manager and the Landlord and hold them harmless from all claims
for bodily injury and property damage (other than property insured under
Paragraph 12.4) that may arise from that contractor's operations. Such
provisions shall be in a form reasonably satisfactory to the Construction
Manager.

12.2  Construction Manager's Liability Insurance
      ------------------------------------------

12.2.1   The Construction Manager shall purchase and maintain such insurance as
will protect him from the claims set forth below which may arise out of or
result from the Construction Manager's operations under this Agreement whether
such operations be by himself or by any Trade Contractor or by anyone directly
or indirectly employed by any of them, or by anyone for whose acts any of them
may be liable.

12.2.1.1 Claims under workers' compensation, disability benefit and other
similar employee benefit acts which are applicable to the Work to be performed.

12.2.1.2 Claims for damages because of bodily injury, occupational sickness or
disease, or death of his employees under any applicable employer's liability
law.

12.2.1.3 Claims for damages because of bodily injury, death of any person other
than his employees.

12.2.1.4 Claims for damages insured by usual personal injury liability coverage
which are sustained (1) by any person as a result of an offense directly or
indirectly related to the employment of such person by the Construction Manager
or (2) by any other person.

12.2.1.5 Claims for damages, other than to the Work itself, because of injury to
or destruction of tangible property, including loss of use therefrom.

12.2.1.6 Claims for damages because of bodily injury or death of any person or
property damage arising out of the ownership, maintenance or use of any motor
vehicle.

12.2.2   The Construction Manager's Commercial General Liability Insurance shall
include premises -- operations (including explosion, collapse and underground
coverage) elevators, independent contractors, completed operations, and blanket
contractual liability on all written contracts, all including broad form
property damage coverage.

                                                                              14
<PAGE>

12.2.3    The Construction Manager's Commercial General and Automobile Liability
Insurance, as required by Subparagraphs 12.2.1 and 12.2.2 shall be written for
not less than limits of liability as follows:

          a. Commercial General Liability

          1. General Liability  $ 2,000,000  Aggregate
                                  ---------

          b. Business Automobile Liability

          1. Combined Single Limit      $ 1,000,000
                                          ---------

          c. Excess Umbrella Liability  $75,000,000

12.2.4    Commercial General Liability Insurance may be arranged under a single
policy for the full limits required or by a combination of underlying policies
with the balance provided by an Excess or Umbrella Liability policy.

12.2.5    The foregoing policies shall contain a provision that coverage
afforded under the policies will not be cancelled or not renewed until at least
sixty (60) days' prior written notice has been given to the Tenant. All
liability insurance policies shall be written on an occurrence basis and shall
name Tenant and Landlord as additional insureds. Certificates of Insurance
showing such coverage to be in force shall be filed with the Tenant prior to
commencement of the Work.

12.2.6    In the event the Tenant elects to provide insurance coverage for the
Construction Manager and/or its Trade Contractors and Trade Subcontractors via a
Wrap-up Insurance Program or otherwise, and the Tenant's insurance program does
not afford the same coverage as stated herein above, the Construction Manager
may purchase a Difference in Conditions policy, the premium for which shall be
reimbursed to the Construction Manager as a Cost of the Project.

12.3  Tenant's Liability Insurance
      ----------------------------

12.3.1    The Tenant shall be responsible for purchasing and maintaining his own
liability insurance and, at his option, may purchase and maintain such insurance
as will protect him against claims which may arise from operations under this
Agreement.

12.4  Insurance to Protect Project
      ----------------------------

12.4.1    The Tenant shall purchase and maintain property insurance in a form
acceptable to the Construction Manager upon the entire Project for the full cost
of replacement as of the time of any loss. This insurance shall include as named
insured the Tenant, Landlord, the Construction Manager, Trade Contractors and
their Trade Subcontractors and shall insure against loss from the perils of
Fire, Extended Coverage, and shall include "All Risk" insurance for physical
loss or damage including, without duplication of coverage, at least theft,
vandalism, malicious mischief, transit, collapse, flood, and earthquake. The
Tenant will increase limits of coverage, if necessary, to reflect estimated
replacement cost. The Tenant will be responsible for any co-insurance penalties
or deductibles (provided, however, that Construction Manager shall pay the
amount of the one thousand dollar ($1,000) deductible to the extent that the
applicable loss or claim arises from any negligence of Construction Manager or
any Trade Contractor). If the Project covers an addition to or is adjacent to an
existing building, the Construction Manager, Trade Contractors and their Trade
Subcontractors shall be named as additional insurers under the Tenant's Property
Insurance covering such building and its contents.

12.4.1.1  If the Tenant finds it necessary to occupy or use a portion or
portions of the Project prior to Substantial Completion thereof, such occupancy
shall not commence prior to a time mutually agreed to by the Tenant and
Construction Manager and to which the insurance company or companies providing
the property insurance have consented by endorsement to the policy or policies.
This insurance shall not be cancelled or lapsed on account of such partial
occupancy.  Consent of the Construction Manager and of the insurance company or
companies to such occupancy or use shall not be unreasonably withheld.

                                                                              15
<PAGE>

12.4.2  The Tenant shall purchase and maintain such boiler and machinery
insurance as may be required or necessary. This insurance shall include the
interests of the Tenant, the Construction Manager, Trade Contractors and their
Trade Subcontractors in the Work.

12.4.3  The Tenant shall purchase and maintain such insurance as will protect
the Tenant, Landlord and Construction Manager against loss of use of Tenant's
and Landlord's property due to those perils insured pursuant to Subparagraph
12.4.1. Such policy will provide coverage for expediting expenses of materials,
continuing overhead of the Tenant, Landlord and Construction Manager, necessary
labor expense, including overtime, and other determined exposures approved by
Tenant. Exposures of the Tenant, Landlord and the Construction Manager shall be
determined by mutual agreement and separate limits of coverage fixed for each
item.

12.4.4  The Tenant shall file a copy of certificates for all such policies with
the Construction Manager before an exposure to loss may occur. Copies of any
subsequent endorsements will be furnished to the Construction Manager. The
Construction Manager will be given sixty (60) days notice of cancellation, non-
renewal, or any endorsements restricting or reducing coverage. If the Tenant
does not intend to purchase such insurance, he shall inform the Construction
Manager in writing prior to the commencement of the Work. The Construction
Manager may then effect insurance which will protect the interest of himself,
the Trade Contractors and their Trade Subcontractors in the Project, the cost of
which shall be a Cost of the Project pursuant to Article 8, and the Project
Construction Budget shall be increased accordingly. If the Construction Manager
is damaged by failure of the Tenant to purchase or maintain such insurance or to
so notify the Construction Manager, the Tenant shall bear all reasonable costs
properly attributable thereto.

12.5  Property Insurance Loss Adjustment
      ----------------------------------

12.5.1  Any insured loss shall be adjusted by the Tenant and/or the Landlord and
made payable to the Tenant and/or the Landlord as trustees for the insured, as
their interests may appear, subject to any applicable mortgagee clause.

12.5.2  Upon the occurrence of an insured loss, monies received will be
deposited in a separate account and the trustees shall make distribution in
accordance with the agreement of the parties in interest.

12.6  Waiver of Subrogation
      ---------------------

12.6.1  The Tenant and Construction Manager waive all rights against each other,
the Architect/Engineer, Trade Contractors, and their Trade Subcontractors for
damages caused by perils covered by insurance provided under Paragraph 12.4,
except such rights as they may have to the proceeds of such insurance held by
the Tenant and Construction Manager as trustees. The Construction Manager shall
require similar waivers from all Trade Contractors and their Trade
Subcontractors.

12.6.2  The Tenant and Construction Manager waive all rights against each other
and the Architect/Engineer, Trade Contractors and their Trade Subcontractors for
loss or damage to any equipment used in connection with the Project and covered
by any property insurance. The Construction Manager shall require similar
waivers from all Trade Contractors and their Trade Subcontractors.

12.6.3  The Tenant waives subrogation against the Construction Manager,
Engineer, Trade Contractors, and their Trade Subcontractors on all property and
consequential loss policies carried by the Tenant on adjacent properties and
under property and consequential loss policies purchased for the Project after
its completion.

12.6.4  If the policies of insurance referred to in this Paragraph require an
endorsement to provide for continued coverage where there is a waiver of
subrogation, the owners of such policies will cause them to be so endorsed.

12.6.5  The Construction Manager shall require all Trade Contractors to carry
and maintain until completion of such Trade Contractor's work insurance meeting
at least the following requirements: (i) worker's compensation having the
statutory coverage, (ii) comprehensive general liability insurance having

                                                                              16
<PAGE>

coverage limits which are commercially reasonable for the applicable trades and
approved by Tenant, and (iii) owned, non-owned and hired motor vehicle insurance
having coverage limits which are commercially reasonable for the applicable
trades and approved by Tenant. Such policies of insurance shall name Tenant and
Landlord as additional insureds.

ARTICLE 13
----------

13.1  Termination by the Construction Manager
      ---------------------------------------

13.1.1  If the Project, in whole or substantial part, is stopped for a period of
thirty days under an order of any court or other public authority having
jurisdiction, or as a result of an act of government, such as a declaration of a
national emergency making materials unavailable, through no act or fault of the
Construction Manager, or if the Project should be stopped for a period of thirty
days by the Construction Manager for the Tenant's failure to make payment
thereon, then the Construction Manager may, upon seven days' written notice to
the Tenant, terminate this Agreement and recover from the Tenant payment for all
work executed, the Construction Manager's Fee earned to date (which shall be in
the same percentage as the percentage completion of the work of the Project as
of the date of termination), and for any proven loss sustained upon any
materials, equipment, tools, construction equipment and machinery, cancellation
charges on existing obligations of the Construction Manager.

13.2  Tenant's Right to Perform Construction Manager's Obligations and
      ----------------------------------------------------------------
Termination by the Tenant for Cause
-----------------------------------

13.2.1  If the Construction Manager fails to perform any of his obligations
under this Agreement, including any obligation he assumes to perform Work with
his own forces, the Tenant shall have the right, but not the obligation, after
seven days' written notice during which period the Construction Manager fails to
perform such obligation, to make good such deficiencies and charge Construction
Manager for all costs incurred for the remedy of such deficiencies.

13.2.2  If the Construction Manager is adjudged a bankrupt, or if he makes a
general assignment for the benefit of his creditors, or if a receiver is
appointed on account of his insolvency, or if he refuses or fails, except in
cases for which extension of time is provided, to supply enough properly skilled
workmen or proper materials (and such default is not cured within seven (7) days
after notice from Tenant), or if he fails to make proper payment to Trade
Contractors or for materials or labor, or violates any laws, ordinances, rules,
regulations or orders of any public authority having jurisdiction, or otherwise
is guilty of a violation of any provision of this Agreement (and such default is
not cured within seven (7) days after notice from Tenant), then the Tenant may,
without prejudice to any right or remedy, upon giving the Construction Manager
and his surety, if any, written notice, terminate this Agreement and take
possession of the site and of all materials, equipment, tools, construction
equipment and machinery thereon owned by the Construction Manager and may finish
the Project by whatever method he may deem expedient.  In such case, the
Construction Manager shall not be entitled to receive any further payment until
the Project is finished.  The Construction Manager shall be responsible for
damages incurred by the Tenant arising as a direct result of the Construction
Manager's default hereunder.

13.2.3. The Tenant reserves the right to terminate this agreement for
convenience at any time.  Tenant will provide seven (7) days written notice to
the Construction Manager and will pay all costs incurred to that point in time
subject to and in accordance with the terms and conditions of this Agreement,
together with a portion of Construction Manager's Fee (which shall be in the
same percentage as the percentage completion of the work of the Project as of
the date of termination).


ARTICLE 14
----------

Assignment and Governing Law
----------------------------

14.1  Neither the Tenant nor the Construction Manager shall assign his interest
in this Agreement without the written consent of the other except as to the
assignment of proceeds; provided, however, that (i) Tenant shall have the right
to assign its interest hereunder to any person or entity at any time prior to

                                                                              17
<PAGE>

Substantial Completion of the Project with the consent of Construction Manager,
such consent not to be unreasonably withheld or delayed, (ii) notwithstanding
the foregoing, Tenant shall have the right to assign its interest hereunder to
any person or entity controlling, controlled by or under control with Tenant or
any of its shareholders, members or partners at any time without the consent of
Construction Manager, and (iii) notwithstanding the foregoing, Tenant shall have
the right to assign its interest hereunder to any person or entity at any time
from or after the date of Substantial Completion of the Project without the
consent of Construction Manager.

14.2 This Agreement shall be governed by the law of the place where the Project
is located.

ARTICLE 15
----------

Miscellaneous Provisions
------------------------

15.1  It is expressly understood that the Tenant shall be directly retaining the
services of an Architect/Engineer.

15.2  Notwithstanding anything contained herein, it is expressly understood that
the Construction Manager's Project Control Systems, including without limitation
estimating, scheduling, purchasing, cost reporting, and project engineering
systems, and all modifications, additions, or alterations thereto, are and shall
remain the sole property of the Construction Manager.

15.3  It is expressly understood that in the event the Construction Manager
incurs reasonable legal or other professional fees in the process of pursuing or
defending a claim, suit, or dispute with a Trade Contractor which is (i)
directly related to the Project, (ii) not caused by any negligent act or
omission or intentional misconduct of Construction Manager, and (iii) not caused
by any default by Construction Manager under its contract with the applicable
Trade Contractor, then such fees shall be reimbursable to the Construction
Manager as a Cost of the Project pursuant to Article 8 subject, however, to the
Guaranteed Maximum Price if one is established.

15.4  Notwithstanding the event of any claim, dispute, or other matter in
question arising out of or relating to this Agreement or the breach thereof, the
Construction Manager shall carry on the Work and the Tenant shall continue to
make payments in accordance with this Agreement.

15.5  Construction Manager shall cause all trade contracts with trade
contractors (including, without limitation, trade contractors, vendors and
consultants) and all purchase orders or supply agreements with all suppliers of
materials and equipment (including, without limitation, all electrical machinery
and appliances if such equipment contains any hardware, software or embedded
microchips) to contain the following representation, warranty and covenant:

          "The (Trade Contractor or supplier, as the case may be) hereby
represents, warrants and covenants that all materials and equipment furnished by
(the applicable Trade Contractor or supplier) to be incorporated into or used in
connection with the Project, including, without limitation, all electrical
machinery and appliances if such equipment contains any hardware, software or
embedded microchips) shall be Year 2000 compliant (as such term is defined
below).  (The Trade Contractor or supplier) hereby agrees that (Tenant) shall be
entitled to rely upon this representation, warranty and covenant and that (Trade
Contractor or Supplier) shall be liable to (Construction Manager) and (Tenant)
for any breach thereof.  As used herein, the term "Year 2000 Compliant" means
that the equipment or materials, if containing or calling on a calendar function
including, without limitation, any functions indexed to the CPU clock, and any
function providing specific dates or days, or calculating spans of dates or
days: will record, store, process, calculate, present and where appropriate
insert true and accurate dates and calculations for calendar dates falling on or
after (and if applicable, spans of time including) January 1, 2000 and February
29, 2000, and will record, store, process, calculate and present any information
and/or data dependent on or relating to such dates in the same manner, and with
the same functionality, data integrity and performance as the equipment records,
stores, processes, calculates and presents calendar dates on or before December
31, 1999, and in such fashion as to eliminate all ambiguities as to the century
of concern, and correctly and accurately regards and processes data and
information with respect thereto such that such equipment will lose no
functionality (as determined in all material respects in accordance with the
substantive warranty provisions provided by the respective manufacturer.)
Without limitation of

                                                                              18
<PAGE>

the foregoing, the Construction Manager shall use commercially reasonable
efforts to ensure that all material and equipment incorporated in the Project is
Year 2000 compliant.

15.6  Construction Manager hereby agrees that the employees of Construction
Manager listed on Schedule 15.6 attached hereto shall be dedicated to the
                  -------------
Project and shall not be removed or replaced from the Project without Tenant's
prior written consent.

15.7  Notwithstanding any provision hereof or of any of the Contract Documents
to the contrary, disputes under this  Agreement shall not be subject to
arbitration or mediation, but shall be decided by a court of competent
jurisdiction in Boston, Massachusetts.  All references in this Agreement or to
any of the Contract Documents shall be deemed to mean and refer to litigation in
a court of competent jurisdiction in Boston, Massachusetts.

15.8  Estoppel Certificates.  Each party hereby agrees to deliver to the other,
      ---------------------
within ten (10) days after any written request thereof, a certificate certifying
(i) the amount that has been paid to Construction Manager by Tenant hereunder as
of the date of such certificate, (ii) that there are not defaults by the
certifying party or, to the best of the certifying parties' knowledge, the
requesting party, under this Agreement, except as set forth in such certificate,
(iii) that this  Agreement is in full force and effect and has not been modified
or amended, except to set forth in such certificate, and (iv) such other matters
as the requesting party may reasonably request.

                                                                              19
<PAGE>

     This Agreement executed the day and year first written above.


ATTEST:                                 TENANT:

/s/ C. Newton, Controller
------------------------------          NaviSite, Inc.


                                        By: /s/ Kenneth W. Hale
                                            ------------------------------------

                                        Title: CFO
                                               ---------------------------------



ATTEST:                                 CONSTRUCTION MANAGER:

(illegible)
------------------------------          GILBANE BUILDING COMPANY


                                        By: /s/ Thomas F. Gilbane, Jr.
                                            ------------------------------------


                                        Title: President/Chief Operating Officer
                                               ---------------------------------

                                                                              20
<PAGE>

                            Exhibits and Schedules
                            ----------------------

               Exhibit                  Description
               -------                  -----------

                 A                      Description of Project

                 B                      General Conditions Estimate



               Schedule                 Description
               --------                 -----------

                 7.2.1                  Example of added fee calculation.
                 15.6                   Key Personnel

                                                                              21
<PAGE>

                                   GUARANTY
                                   --------


     Reference is hereby made to that certain Construction Agreement dated as of
April 12, 1999 by and between Gilbane Building Company and NaviSite, Inc.
("Tenant") (the "Agreement"). Capitalized terms used herein and not otherwise
defined shall have the respective meanings ascribed to such terms in the
Agreement.

     CMGI, Inc. ("Guarantor") hereby guarantees the payment and performance by
Tenant of its obligations under the Agreement, subject to, and in accordance
with, the terms and provisions thereof.

     Notwithstanding anything to the contrary contained herein, this Guaranty
and all of Guarantor's obligations and agreements hereunder and under the
Agreement shall terminate and be of no further force or effect immediately upon
the closing of the initial public offering of shares of common stock of Tenant
pursuant to an effective registration statement under the Securities Act of
1933, as amended.


                                   CMGI, INC.


                                   By:  _______________________________
                                        Name:
                                        Title:

                                                                              22
<PAGE>

Exhibit A - Note That This Drawing List Represents The Entirety Of The Scope Of
The 400 Minuteman Drive Project for the Landlord As Well As The Fit-Out Work Of
The Tenant. The Documents (In Some Cases) Contain A Blend Of The Work For Both
And The Comments Column Will Attempt To Define The Specific Work Contained On
That Drawing For the Tenant.


Gilbane

400 Minuteman/Navisite                                  Grouped by Discipline
GBCo Job #2695/2728                                     Date Range: All Dates
400 Minuteman                                           Printed on: 10/15/99
1776 Drive
Andover, MA 01810

Architectural

<TABLE>
<S>        <C>    <C>                                            <C>       <C>
A001        2     General Notes, Partition Types, Door           7/30/99   Tenant responsibility as pertains to First Floor only.
                  Types, Details

A201        2     First Floor Plan                               7/30/99   All Work from inside face of ext. wall is by Tenant.
                                                                           Stair towers, lobby, toilet rooms and loading dock is
                                                                           by Landlord.

A202        2     Second Floor Plan                              7/30/99   Landlord provided.

A203        2     Roof Plan                                      7/30/99   Landlord provided.

A301        2     Reflected Ceiling Plan                         7/30/99   Landlord provided (Lobby).

A401        2     Floor Finish Plans                             7/30/99   Landlord provided (Lobby & Toilet rooms).

A501              Enlarged Stair Plans, Sections, and Details    7/30/99   Landlord provided.

A502        2     Enlarged Stair Plans, Sections, and Details    7/30/99   Landlord provided.

A503        2     Enlarged Toilet Room Plans & Details           7/30/99   Landlord provided.

A504        2     Enlarged Lobby Plans                           7/30/99   Landlord provided.

A700        2     Elevations                                     7/30/99   Landlord provided.

A701        2     Enlarged Elevations                            7/29/99   Landlord provided.

A710        2     Wall Sections, Detail Elevations & Plans       7/30/99   Notations "By Others" are by Tenant. Also, Bentonite
                                                                           waterproofing at below grade ext. foundations is by
                                                                           Tenant.

A711        2     Lobby Cross Sections                           7/30/99   Landlord provided.

A713        2     Wall Sections,                                 7/30/99   Landlord provided.
</TABLE>

                                                                              23
<PAGE>

<TABLE>
<S>         <C>   <C>                                           <C>           <C>
A714        2     Lobby Longitudinal Sections                   7/30/99       Landlord provided.

I-201       2     Partial Second Floor Partition Plan           7/29/99       Landlord provided except for fabric wall
                                                                              panels to be by Tenant.

I-202       2     Partial Second Floor Partition Plan           7/29/99       Landlord provided except for operable wall
                                                                              which is by Tenant.

I-203       2     Partial Second Floor Finish Plan              7/29/99       Landlord provided except for areas receiving
                                                                              fabric wall covering which is by Tenant.

I-204       2     Partial Second Floor Finish Plan              7/29/99       Landlord provided.

I-205       2     Partial Second Floor Furniture Plan           7/29/99       All furniture and workstations shown are by
                                                                              Tenant.

I-206       2     Partial Second Floor Furniture Plan           7/29/99       All furniture and workstations shown are by
                                                                              Tenant.

I-207       2     Partial Second Floor Reflected Ceiling        7/29/99       Landlord provided.
                  Plan

I-208       2     Partial Second Floor Reflected Ceiling        7/29/99       Landlord provided.
                  Plan

I-301       2     Interior Elevations                           7/29/99       NOC areas are by Tenant, Breakroom is by
                                                                              Landlord, Conf. Room(s) are by Landlord.

I-401       2     Interior Details                              7/29/99       Landlord provided except for Moveable
                                                                              Partition by Tenant.

I-501       2     Door Elevations                               7/29/99       Landlord provided except security hardware by
                                                                              Tenant.
</TABLE>

ARCHITECTURAL - NAVISITE

<TABLE>
<S>         <C>   <C>                                           <C>           <C>
I-000       2     Title Sheet                                   7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-101       2     Partial First Floor Partition Plan            7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided

I-102       2     Partial First Floor Partition Plan            7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-103       2     Partial First Floor Finish Plan               7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-104       2     Partial First Floor Finish Plan               7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-105       2     Partial First Floor Furniture Plan            7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-106       2     Partial First Floor Furniture Plan            7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-107       2     Partial First Floor Reflected Ceiling Plan    7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-108       2     Partial First Floor Reflected Ceiling Plan    7/29/99       Tenant provided except shaded areas are
                                                                              Landlord provided.

I-502       2     Door Schedule                                 7/29/99       Tenant provided.
</TABLE>

                                                                              24
<PAGE>

Civil

<TABLE>
<S>   <C>       <C>                                     <C>         <C>
AL-3            Proposed Grading Plan                   4/20/99     Superseded by L-3 5/17/99. Landlord provided.

AL-4            Proposed Drainage & Utilities Plan      4/20/99     Supersede by L-4 5/17/99. Landlord provided.

AL-6            Planting Plan                           4/20/99     Superseded by L-5, 5/17/99. Landlord provided.

L-1             Existing Conditions Plan                5/17/99     Landlord provided.

L-10            Details                                 5/17/99     Landlord provided.

L-2             Existing Conditions Plan                5/17/99     Landlord provided.

L-3             Proposed Grading Plan                   5/17/99     Landlord provided.

L-4             Proposed Drainage & Utilities Plan      5/17/99     Landlord provided except for added waterline cost per RFA 25.

L-5             Proposed layout Plan                    5/17/99     Landlord provided with exception of implied generator pads
                                                                    by Tenant.

L-6   SKL-14    Planting - Plan                         8/20/99     Landlord provided.

L-7             Details                                 5/17/99     Landlord provided.

L-8             Details                                 5/17/99     Landlord provided.

L-9             Details                                 5/17/99     Landlord provided.

LSC01           NONE                                    5/17/99     Landlord provided.
</TABLE>

Electrical

<TABLE>
<S>         <C>     <C>                                           <C>             <C>
E-0         1       Electrical Symbols, Abbreviations and         7/30/99         Landlord provided.
                    Details

E-1         1       Partial First Floor South - Power Plan        7/19/99         Landlord provided.


E-10        2       Roof Plan - North - Electrical Plan           8/ 6/99         Landlord provided.


E-11        1       Mechanical Connections Power Plan             8/ 6/99         Landlord provided.

E-12                Electrical Riser Diagram                      7/ 7/99         Landlord provided.

E-13                Electrical Details                            7/ 7/99         Landlord provided.

E-14        2       Electrical Details                            7/30/99         Landlord provided.
</TABLE>

                                                                              25
<PAGE>

<TABLE>
<S>         <C>     <C>                                           <C>             <C>
E-15                Electrical Details                            7/ 7/99         Landlord provided.

E-16        2       Electrical Panel Schedules                    8/ 6/99         Landlord provided.

E-17        2       Electrical Panel Schedules                    8/ 6/99         Landlord provided.

E-2         2       Partial First Floor North - Power Plan        7/30/99         Landlord provided.

E-3         1       Partial First Floor South - Lighting Plan     7/30/99         Landlord provided.

E-4         1       Partial First Floor North - Lighting Plan     7/30/99         Landlord provided.

E-5         1       Partial Second Floor South - Power Plan       7/19/99         Landlord provided except for UPS wiring shown.

E-6         1       Partial Second Floor North - Power Plan       7/19/99         Landlord provided except for UPS wiring shown.

E-7         1       Partial Second Floor South - Lighting Plan    7/30/99         Landlord provided.

E-8                 Partial Second Floor North - Lighting Plan    7/ 7/99         Landlord provided.

E-9         2       Roof Plan - South - Electrical Plan           8/ 6/99         Landlord provided.

ESL-1       2       Electrical Site Lighting and Utility Plan     7/30/99         Landlord provided except  for 50% cost
                                                                                  to Tenant for incoming telephone, 100% of cost
                                                                                  for incoming electrical from Generators and 100%
                                                                                  cost for Emergency Intercom Stations.
</TABLE>

Electrical - Navisite

<TABLE>
<S>         <C>     <C>                                           <C>             <C>
E-0/ N      1       Electrical Symbols, Abbreviations and         7/19/99         Tenant provided.
                    Details

E-1/ N      3       Partial First Floor South - Power Plan        8/ 6/99         Tenant provided.

E-10/ N     2       Electrical Panel Schedules                    8/ 6/99         Tenant provided.

E-11/N      1       Electrical Panel Schedules                    7/30/99         Tenant provided.

E-12/N              Details - Power Distribution Units            7/30/99         Tenant provided.

E-13/N              Roof Plan - Security Camera Locations         7/30/99         Tenant provided.

E-14/N      1       2nd Floor Plan Leak Detection Equipment       8/ 6/99         Tenant provided.
                    Plan

E-2/ N      2       Partial First Floor North - Power Plan        7/30/99         Tenant provided.

E-3/ N              Partial First Floor South - Lighting Plan     7/ 7/99         Tenant provided.

E-4/ N              Partial First Floor North - Lighting Plan     7/ 7/99         Tenant provided.

E-5/ N      2       Mechanical/ Electrical Room Power Plan        7/30/99         Tenant provided.

E-6/ N      2       Penthouse Area Power and Lighting Plan        8/ 6/99         Tenant provided.

E-7/ N              Mechanical/ Electrical Room Duct Bank Plan    7/ 7/99         Tenant provided.
                    and Details

E-8/ N      1       One Line Diagram                              7/19/99         Tenant provided.

E-9/ N      2       Electrical Riser Diagram                      8/ 6/99         Tenant provided.
</TABLE>

                                                                              26
<PAGE>

<TABLE>
<S>                 <C>                                           <C>             <C>
UGC-1/N             Underground Conduit                           7/ 7/99         Tenant provided.
</TABLE>

Fire Protection

<TABLE>
<S>                 <C>                                           <C>             <C>
FP-1                Partial Second Floor South - Fire             7/ 7/99         Landlord provided.
                    Protection Plan

FP-2                Partial Second Floor North - Fire             7/ 7/99         Landlord provided.
                    Protection Plan

FP-3                Penthouse Floor -  Fire                       7/ 7/99         Landlord provided.
                    Protection Plan

FP-4                Fire Protection Notes, Symbols, and           7/ 7/99         Landlord provided.

                    Abbreviations and Details

FP-5                Fire Service Schematic and Schedules          7/ 7/99         Landlord provided.
</TABLE>

Fire Protection - Navisite

<TABLE>
<S>             <C>           <C>                                            <C>        <C>
CS01            2             Cover Sheet                                    7/30/99    Tenant provided.

FP-1/ N                       Partial First Floor South - Fire Protection    7/ 7/99    Tenant provided except for FP at Lobby
                              Plan                                                      Zone 5, Stair Towers and Loading Dock.


FP-2/ N                       Partial First Floor North - Fire Protection    7/ 7/99    Tenant provided except for FP at Lobby
                              Plan                                                      Zone 5, Stair Towers and Loading Dock.
</TABLE>

Mechanical

<TABLE>
<S>         <C>             <C>                                             <C>              <C>
M-0                         Symbols, Abbreviations and Notes                7/ 7/99          Landlord provided.

M-1                         Partial First Floor South- HVAC Plan            7/ 7/99          Landlord provided.

M-2         1               Partial First Floor North - HVAC Plan            7/30/99         Landlord provided.

M-3         1               Partial Second Floor South - HVAC Plan           7/30/99         Landlord provided.

M-4         1               Partial Second Floor North - HVAC Plan           7/30/99         Landlord provided.

M-5                         Roof Plan - South - HVAC Plan                    7/ 7/99         Landlord provided.

M-6                         Roof Plan - North - HVAC Plan                    7/ 7/99         Landlord provided.

M-7         1               Details                                          7/30/99         Landlord provided.

M-8                         Details                                          7/ 7/99         Landlord provided.

M-9         1               Schedules                                        7/30/99         Landlord provided with exception of
                                                                                             Tenant shared cost on RTU's/AHU per
                                                                                             RFA 19.
</TABLE>

Mechanical - Navisite

<TABLE>
<S>                      <C>                                        <C>            <C>
M-0 /N                   Symbols, Abbreviations and Notes           7/ 7/99        Tenant provided.
</TABLE>

                                                                              27
<PAGE>

<TABLE>
<S>            <C>       <C>                                          <C>             <C>
M-1/ N         1         Partial First Floor South - HVAC Plan        7/30/99         Tenant provided.

M-10/ N        2         Details                                      8/ 6/99         Tenant provided.

M-11/ N        1         Details                                      7/30/99         Tenant provided.

M-12/ N        1         Schedules                                    7/30/99         Tenant provided.

M-2/ N                   Partial First Floor North - HVAC Plan        7/ 7/99         Tenant provided.

M-3/ N                   Roof  - South - HVAC Plan                    7/ 7/99         Tenant provided.

M-4/ N                   Roof - North - HVAC Plan                     7/ 7/99         Tenant provided.

M-5/ N         1         Mechanical Room Plan                         7/30/99         Tenant provided.

M-6/ N         1         Mechanical Room Sections                     7/30/99         Tenant provided.

M-7/ N         1         Mechanical Room Perspective                  7/30/99         Tenant provided.

M-8/ N         1         Condenser Water Flow Diagram                 7/30/99         Tenant provided.

M-9/ N                   Chilled Water Flow Diagram                   7/ 7/99         Tenant provided.
</TABLE>

Plumbing

<TABLE>
<S>            <C>       <C>                                          <C>             <C>
P1             2         First Floor Plumbing                         7/15/99         Landlord provided.

P2             2         Second Floor Plumbing                        7/15/99         Landlord provided.

P3             1         Roof Plan Plumbing                           5/24/99         Landlord provided.

P4             2         Plumbing  1/4" Scale Toilet Rooms &          7/ 8/99         Landlord provided.
                         Water/Fire Service Room

P5             1         Plumbing Details & General Notes             5/24/99         Landlord provided.

P6             1         Plumbing Details                             5/24/99         Landlord provided.
</TABLE>

Plumbing - Navisite

<TABLE>
<S>            <C>       <C>                                          <C>             <C>
P-1/ N                   Symbols, Abbreviations and Details           7/ 7/99         Tenant provided.

P-2/ N                   Partial First Floor South - Plumbing Plan    7/ 7/99         Tenant provided.

P-3/ N                   Partial First Floor North - Plumbing Plan    7/ 7/99         Tenant provided.

P-4/ N                   Partial Second Floor South - Plumbing Plan   7/ 7/99         Tenant provided.

P-5/ N                   Partial Second Floor North - Plumbing Plan   7/ 7/99         Tenant provided.

P-6/ N                   Roof Plan - Plumbing                         7/ 7/99         Tenant provided except drains by Landlord.

P-7/ N         1         Mechanical Room Plan                         7/30/99         Tenant provided.
</TABLE>

                                                                              28
<PAGE>

Structural

<TABLE>
<S>         <C>       <C>                                         <C>            <C>
S100        2         Foundation Plan Area A                      5/ 7/99        Landlord provided.

S101        2         Foundation Plan Area B                      5/ 7/99        Landlord provided.


S200        2         Second Floor Framing Plan Area A            5/ 7/99        Landlord provided.


S201        2         Second Floor Framing Plan Area B            5/ 7/99        Landlord provided.


S300        3         Roof Framing Plan Area A                    6/30/99        By Landlord except for increase steel at
                                                                                 chillers.  Also, steel pipe & flashing at 12
                                                                                 locations (RFA 21&45).

S301        2         Roof Framing Plan Area B                    5/ 7/99        Landlord provided.

S302        3         High Roof Framing Plan                      7/ 1/99        Landlord provided except for steel pipe &
                                                                                 flashing at 12 locations (RFA 21 & 45)

S400        2         Column Schedule                             5/ 7/99        Landlord provided.

S401        2         Column Schedule & Typical Details           5/ 7/99        Landlord provided.

S402        2         Lateral Bracing Elevations                  5/ 7/99        Landlord provided.

S500        2         Sections & Details                          5/ 7/99        Landlord provided.

S600        2         Sections & Details                          5/ 7/99        Landlord provided.

S700        3         Sections & Details                          7/ 1/99        Landlord provided.
</TABLE>

Structural - Navisite

<TABLE>
<S>                   <C>                                         <C>            <C>
SP-1                  Slab On Grade Plan                          7/23/99        Tenant provided.

SP-2                  Slab On Grade Plan                          7/23/99        Tenant provided.


SP-3                  Typical Details                             7/23/99        Tenant provided.
</TABLE>

                                                                              29
<PAGE>


Organizational Chart - Schedule 15.6


<TABLE>
<CAPTION>
                                                       --------------------
                                                             NaviSite
                                                       --------------------
                                                              GILBANE
                                                         Regional Project
                                                             Executive
                                                          Kevin Unsworth
                                                       --------------------
                                                              GILBANE
                                                           Local Project
                                                             Executive
                                                           Dave Deforest
                                                            (part time)
                              -----------------------------------------------------------------------
                              Regional Services                                           Field Staff
----------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                         <C>                    <C>                             <C>
   Gilbane                        Gilbane                     Gilbane                       Gilbane                     Gilbane    *
Chief Estimator               Sr. Purchasing              Cost Accounting               Project Manager                Tenant/MEP
 Don Michaels                     Agent                    Joe Loiselle                   Jim Driscoll                Coordinator
                               Gene Oakland                                                                            Bob Vierra
----------------------------------------------------------------------------------------------------------------------------------
  Gilbane                                                                                  Gilbane                     Gilbane     *
Architecture                                                                                 Area                    Data Center
 Estimator                                                                              Superintendant                Consultant
 Joe McCoy                                                                                Mick Owens                  Scott Good
                                                                                                                    [Text Deleted]
---------------                                                                        -------------------------------------------
   Gilbane                                                                                   Gilbane                   Gilbane    *
  Mechanical                                                                            Project Engineer              Assistant
  Estimator                                                                                Neil Benner              Superintendent
Ashvin Kapadia                                                                             (part time)               Al Choulnerd
                                                                                                                    [Text Deleted]
---------------                                                                        -------------------------------------------
   Gilbane                                                                                                             Gilbane    *
  Plumbing                                                                                                          Asst. Project.
  Estimator                                                                                                             Engr.
John Morenzi                                                                                                           Laura C
                                                                                                                    [Text Deleted]
                                                                                                                      to 8-12-98
                                                                                                                    [Text Deleted]
---------------                                                                        -------------------------------------------
    Gilbane                                                                                                Gilbane                *
Elec. Estimator                                                                                      Technical Assistant
  Ron Dupont                                                                                            Jeff Mattson
                                                                                                         (part time)
---------------                                                                        -------------------------------------------
                                                                                                           Gilbane                *
                                                                                                       Prj. Accountant
                                                                                                         Alan Burns
                                                                                                         (part time)
---------------                                                                        -------------------------------------------
</TABLE>

*As per Exhibit B, represents only those whose charges are billed direct and
thus pertinent to the terms of Article 15.6.
<PAGE>


<TABLE>
<CAPTION>
                                                             EXHIBIT B

                                                    GENERAL CONDITIONS SUMMARY

Job Name:        400 Minuteman Drive - Tenant Work
Location:        Andover, MA
Prepared by:     WKU
State Job in:    MA    Estimate Type:   GMP                        Saft:   50,000
====================================================================================================================================
<S>                          <C>            <C>                    <C>                         <C>                        <C>
BUDGET:                      $0
PRECON SCHEDULE:                            Through                                             0.00 MONTHS
CONSTR. SCHEDULE:              8/2/99       Through                  1/28/00                    5.97 MONTHS
====================================================================================================================================
TOTALS                                      DIRECT LABOR           OH & BURDEN                 DIRECT COST                TOTALS
------------------------------------------------------------------------------------------------------------------------------------
PRECONSTRUCTION
BP 902        Regional Labor                        $0                     $0                                                  $0
BP 900        Field Labor                           $0                     $0                                                  $0
BP 908        Regional Support                                                                         $0                      $0
------------------------------------------------------------------------------------------------------------------------------------
TOTAL PRECONSTRUCTION                               $0                     $0                          $0                      $0
              Percent of Budget                                                                              #DIV/0!
------------------------------------------------------------------------------------------------------------------------------------
CONSTRUCTION
BP 922        Regional Labor                   $26,917                $32,301                                            $ 59,218
BP 920        Field Labor                     $113,228                $53,840                                            $167,068
BP 928        Regional Support                                                                     $3,536                $  3,536
BP 925        Field Office Operations                                                             $65,020                $ 65,020
BP 926        Field Office Support                                                                $55,300                $ 55,300
------------------------------------------------------------------------------------------------------------------------------------
TOTAL CONSTRUCTION                           $140,145                 $86,140                    $123,856                $350,141
              Percent of Budget
TOTAL GENERAL CONDITIONS                     $140,145                 $86,140                    $123,856                $350,141
              Percent of Budget
BOND REQUIRED?                 Yes                 $0        Calculates from budget above                                      $0
BUILDER'S RISK INSUR.           0                  $0            "                                                             $0
BUILDING PERMIT                 0                  $0            "                                                             $0
STATE SALES TAX                 0                  $0                                                                          $0
PROFESSIONAL LIAB               0                  $0        .00186 up to $1mil                                                $0
GENERAL LIABILITY         0.00416                  $0        Get Quote if Prof Liab (greater than) $1 mil                      $0
TOTAL ALL COSTS                                                                                                          $350,141
FEE ANALYSIS
Total Raw Labor                              $140,145
Excess OH                                          $0
Base fee on Budget          0.00%                  $0
Base Fee Plus Excess Overhead                      $0
Less Non-reimbursables                        $62,754
NET FEE                                      ($62,754)
ROL                                             (0.45)
RATE TABLE
<CAPTION>
<S>                          <C>               <C>     <C>
Home Office                  Field Rates        GBCo   MIS =  2.00
     Excess OH      0.00%    Excess OH          0.00%  NON REIMBURSABLE ITEMS
     Fringes       44.00%    Taxes             10.49%  Precon discounting                                                    0
     Overhead      76.00%    Work Cmp          10.10%  ?                                                                     0
TOTAL             220.00%    Maj Med           19.46%  ?                                                                     0
Escalation                   Vacation           7.50%  ?                                                                     0
     Precon         0.00%    TOTAL             47.55%  ?                                                                     0
     Const.         0.00%                              TOTAL                                                                 0
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate          Quantity   Man Hours     Total Cost  Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                             <C>             <C>          <C>           <C>          <C>          <C>
B.P. 902   PRECONSTRUCTION - REGIONAL
           LABOR

992110     R Project Executive                   $346              0 Dys       0             $0            yes                $0
992200     R Scheduling                          $288              0 Dys       0             $0            yes                $0
992300     R. Accounting Dept                    $210              0 Dys       0             $0            yes                $0
992170     R Cost Accounting                     $262              0 Dys       0             $0            yes                $0
992400     R Purchasing, Support                                In below
           (Carry None)                            $0                Dys       0             $0            yes                $0
992400     R Purchasing, PA 3.5 day per BP       $212              0 Dys       0             $0            yes                $0
992520     R Chief Estimator                     $365              0 Dys       0             $0            yes                $0
992530     R Electrical Estimator                $315              0 Dys       0             $0            yes                $0
992540     R. Mechanical Estimator               $297              0 Dys       0             $0            yes                $0
992540     R Plumbing/FP Estimator               $196              0 Dys       0             $0            yes                $0
992550     R Architectural Estimator             $212              0 Dys       0             $0            yes                $0
992560     R Est Exec, Job Capt                  $288              0 Dys       0             $0            yes                $0

Subtotal Regional Bare Labor                                       0 Dys       0             $0

           Escalation    0.00%                                                               $0                               $0

Subtotal Escalation                                                                          $0                               $0

982500     G Excess OH  0.00%                                                                $0                               $0
000098     G. Fringes   44.00%                                                               $0                               $0
000099     G Overhead   76.00%                                                               $0                               $0

Subtotal Fringes & Overhead                                                                  $0                               $0

B.P. 900   PRECONSTRUCTION - FIELD LABOR

991001     P Project Execution                   $346              0 Dys       0             $0            yes                $0
991010     P Project Manager                     $269              0 Dys       0             $0            yes                $0
991500     P Project Engineer                    $173              0 Dys       0             $0            yes                $0
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate          Quantity   Man Hours     Total Cost  Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                             <C>             <C>          <C>           <C>          <C>          <C>
?                     P Est Exec                  $288             0 Dys          0           $0           yes              $0
991630                P Project Estimator         $212             0              0           $0           yes              $0

Subtotal Field Bare Labor                                          0              0           $0                            $0

                       Escalation  0.00%                                                      $0                            $0
Subtotal Escalation                                                                           $0                            $0

982500               G Excess Overhead 0.00%                                                  $0                            $0
981010               G Fed/State Taxes 10.49%                                                 $0                            $0
981030               G Worker's Comp. 10.10%                                                  $0                            $0
981050               G Major Medical 19.46%                                                   $0                            $0
982300               G Accrued Vacation 7.50%                                                 $0                            $0

Subtotal Field Burden                                                                         $0                            $0

Total Preconstruction Labor                                                                   $0                            $0

B.P. 908             PRECONSTRUCTION -
                     REGIONAL SUPPORT

992650               G Travel - Auto from ?          ?             0 Trips                    $0           yes              $0
992650               G Travel - Auto from ?          ?             0 Trips                    $0           yes              $0
992700               G Stationary/Supplies          $0             0 MO                       $0           yes              $0
992710               G Bid Document printing,
                       shipping                      ?             0 Sets                     $0           yes              $0
992720               G MIS Services                 $2               MH                       $0           yes              $0
992730               G Postage                     $25             0 MO                       $0           yes              $0
992740               G Photocopy                   $25             0 MO                       $0           yes              $0
992750               G Telephone                   $50             0 MO                       $0           yes              $0
992755               G Miscellaneous out of pocket  $0             0 LS                       $0           yes              $0

Subtotal Preconstruction Support                                                              $0                            $0

Total Preconstruction                                                                         $0                            $0

B.P. 922             CONST. - REGIONAL LABOR NON
                              RECOVERABLE

992112 R Principal                                $385                0 Dys       0            $0           no              $0
</TABLE>

<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate          Quantity   Man Hours     Total Cost  Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                             <C>             <C>          <C>           <C>          <C>          <C>

992110        R. Project Executive - 8dy/wk     $404              35 Dys        280         $14,140        no          $14,140
992120        R Safety Engineer                 $288               0 Dys          0              $0        no               $0
992300        R Accounting                      $210              15 Dys        120          $3,156        no           $3,156
992170        R Cost Accountant - 1 dy/mo       $262              10 Dys         80          $2,615        no           $2,615
992200        R Scheduling, updates             $288               0 Dys          0              $0        no               $0
992400        R Purchasing Agent 3.5 day per
v              BP                               $239              18 Dys        144          $4,302        no           $4,302
992400        R Purchasing, Support             $  0            In above          0              $0        no               $0
                                                                     Dys
992185        R Technology Set-up               $192              10 Dys         80          $1,920        no           $1,920
992185        R Technology Support (2dy/month)  $192               0 Dys          0              $0        no               $0
992540        R Mechanical Estimator            $297               0 Dys          0              $0        no               $0
992540        R Plumbing, FP Estimator          $196               0 Dys          0              $0        no               $0
992530        R Electrical Estimator            $315               0 Dys          0              $0        no               $0
992550        R Architectural Estimator         $212               0 Dys          0              $0        no               $0
992560        R Est Exec, Job Captain           $288               0 Dys          0              $0        no               $0

Subtotal Regional Bare Labor                                      88 Dys        704        $26,133                     $26,133

              Escalation      3.00%                                                           $784                        $784

Subtotal Escalation                                                                           $784                        $784

982500        G Excess OH   0.00%                                                                $0                         $0
000098        G Fringes    44.00%                                                           $11,844                    $11,844
000099        G Overhead   76.00%                                                           $20,457                    $20,457

Subtotal Fringes    & Overhead                                                              $32,301                    $32,301


B.P. 920   CONSTRUCTION - FIELD LABOR            5.97 mnth            -       25.85
                                                                              weeks
           If you change the duration
           unit (weeks to days), change
           man hour calc too.

991001     P Project Executive                                  0 Dys             0              $0       yes              $0
991010     P Project Manager                                    0 Wks             0              $0       yes              $0
925991720  P Completion Bonus, 9% PM, 12%            9.00%          -             0              $0       yes              $0
           on site PX

</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate          Quantity   Man Hours     Total Cost  Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                          <C>             <C>          <C>          <C>           <C>          <C>
991020     P Asst. Project Manager                                0 Wks          0             $0         yes                   $0
991200     P General Superintendent                               0 Wks          0             $0         yes                   $0
991210     P Asst. Superintendent                                 0 Wks          0             $0         yes                   $0
991220     P Area Superintendent                                  0 Wks          0             $0         yes                   $0
991240     P Mech Superintendent             $1,346              35 Wks      1,400        $47,110         yes                   $0
991250     P Elect. Superintendent                                0 Wks          0             $0         yes                   $0
991410     P Computer Consultant               $308              35 Dys        280        $10,780         yes                   $0
991500     P Project Engineer                                     0 Wks          0             $0         yes                   $0
991510     P Asst. Project Engineer          $1,000              35 Wks      1,400        $35,000         yes                   $0
991050     P Project Acct, 1 dy/wk.            $193              35 Dys        280         $6,755         yes                   $0
991670     P Technical Asst.                   $121              85 Dys        680        $10,285         yes                   $0
991630     P Project Estimator                                    0 Wks          0             $0         yes                   $0
991650     P Project Scheduler                                    0 Wks          0             $0         yes                   $0

Subtotal Field Bare Labor                                                    4,040       $109,930                               $0

           Escalation    3.00%                                                             $3,298                               $0

Subtotal Escalation                                                                        $3,298                               $0

992500     G Excess Overhead  0.00%                                                            $0                               $0
981010     G Fed/State Taxes  10.49%                                                      $11,878                               $0
981030     G Worker's Comp.  10.10%                                                       $11,436                               $0
981050     G Major Medical  19.46%                                                         $8,492                               $0
982300     G Accrued Vacation  7.50%                                                       $8,492                               $0

Subtotal Field Burden                                                                     $53,840                               $0

Total Construction Labor                                                                 $226,285                          $59,218

B.P.  928  CONST. - REGIONAL SUPPORT
           NON RECOVERABLE

992650     G Travel - Auto from CT             $56               38 Trips                  $2,128         no                $2,128
992650     G Travel - Auto from Prov.            ?                0 Trips                      $0         no                    $0

</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate          Quantity   Man Hours     Total Cost  Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                          <C>             <C>          <C>          <C>           <C>          <C>
992700     G Stationary/Supplies                                    0 MO                      $0          no                  $0
992720     G MIS Charges - QBCo                     $2            704 MH                  $1,408          no              $1,408
992740     G Photocopying - Rgnl                   $20              0 MO                      $0          no                  $0
992730     G Postage                               $25              0 MO                      $0          no                  $0
992750     G Telephone - Rgnl                       $0              0 MO                      $0          no                  $0
992755     G Miscellaneous, Out of pocket           $0              0 LS                      $0          no                  $0

Subtotal Regional Support                                                                 $3,536                          $3,536

B.P.       925 CONSTRUCTION -
           FIELD OFFICE OPERATIONS

991700     G Subsistence/Moving                $25,000              1 Allow              $25,000          yes                 $0
991710     G Relocation - Payroll                   $0              0 Wks                     $0          yes                 $0
991750     G Job Travel - Auto                    None              0 Trips                   $0          yes                 $0
991750     G Job Travel - Air                     None              0 Trips                   $0          yes                 $0
991751     G Site Vehicle Lease                   $600              0 MO                      $0          yes                 $0
991752     G Site Vehicle Fuel/Maintain           $200              0 MO                      $0          yes                 $0
993005     G Setup/Demob Fld Office               $500              0 LS                      $0          yes                 $0
993010     G Gilbane Fld Office Rent              $300              0 MO                      $0          yes                 $0
993010     G Own/AE Fld Office                    None              0 MO                      $0          yes                 $0
993020     G Fld Office Furniture                 $500              0 EA                      $0          yes                 $0
993015     S Fld Office Janitor                    $40              0 MO                      $0          yes                 $0
994010     G Stationary/Supplies                  $500              0 LS                      $0          yes                 $0
994020     G Postage, Overnite                    $150              0 MO                      $0          yes                 $0
994030     G Misc Office Equip                      $0              0 EA                      $0          yes                 $0
994035     G Fax Machine                          $350              0 LS                      $0          yes                 $0
994040     G Telephone use                          $1              0 MO                      $0          yes                 $0
994050     G Phones and Radios                      $1              0 LS                      $0          yes                 $0
994055     G Trailer lap top Comp, Prolog,
           MS of 1 set up                       $5,970              2 EA                 $11,940          yes                 $0
994055     G Office Desk top Comp.,
           Prolog, MS Off., 1 ea                $3,570              0 EA                      $0          yes                 $0

</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate          Quantity   Man Hours   Total Cost   Reimbursable        Total
Code                                                                                                  yes or no     Non-Reimbursable

<S>                                     <C>               <C>           <C>           <C>          <C>          <C>
994055     G Site Printer, 500 to 1500
           range each                            $0               0 EA                        $0          yes                  $0
994055     G Site Primavera Lease               $95               0 MO                        $0          yes                  $0
994056     G MIS Charges (field Only)            $2          4,040 Hrs                    $8,080          yes                  $0
994060     G Site trailer Lighting             $100              0 MO                         $0          yes                  $0
994070     G Site trailer Heat                 $100              0 MO                         $0          yes                  $0
994080     G Coffee/Water                       $75              0 MO                         $0          yes                  $0
994100     G First Aid                         $500              0 LS                         $0          yes                  $0
992710     G Bid Document printing,
           shipping                         $20,000           1 Allow                    $20,000          yes                  $0
994210     G Shop Drawing Printing          $ 1,000              0 LS                         $0          yes                  $0
994220     G Record Document Printing            $0            0 Sets                         $0          yes                  $0
994240     G Photocopier rental                $400              0 MO                         $0          yes                  $0
                                                                                              $0                               $0

Subtotal Field Office Operation                                                          $65,020                               $0

B.P. 926   CONSTRUCTION -
           FIELD OFFICE SUPPORT

993025     G Storage Trailer                None                0 MO                          $0          yes                  $0
993035     G Temporary Toilets,
            2 each                          $130                0 MO                          $0          yes                  $0
993035     S Trailer Temp plumbing             ?                0 LS                          $0          yes                  $0
993040     S Temporary Fencing                $8                0 LF                          $0          yes                  $0
993050     G Project Signs,
           (Main & Safety)                $1,000                0 EA                          $0          yes                  $0
993060     S Sidewalk Overhead
            Protection                      None                0 LF                          $0          yes                  $0
993070     S Safety rails, opening
            protection                      None                0 LF                          $0          yes                  $0
993081     S Gang ladders,
            temp stairs                     None                0 LF                          $0          yes                  $0
993080     S Safety Consultant              By
                                            regional            0 EACH                        $0          yes                  $0
993080     G Safety, misc. material,
            incentives                        $500              0 LS                          $0          yes                  $0
993089     G Drug Testing Costs                $50              0 EA                          $0          yes                  $0
995040     G Progress Photos                   $50              0 week                        $0          yes                  $0
995055     S Field Eng. Services            Trades              0 Wks                         $0          yes                  $0
9950??     S Preconstruction Site Survey    Trades              0 Wks                         $0          yes                  $0

</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate      Quantity     Man Hours     Total Cost    Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                     <C>               <C>           <C>          <C>           <C>              <C>

995060      S Pest Control                   Trades              0 MO                       $0            yes                   $0
995070      G Ceremonies                       None              0 LS                       $0            yes                   $0
995080      S Testing                            $0            0 ALLW                       $0            yes                   $0
995090      G Misc Advertising Costs             $0            0 ALLW                       $0            yes                   $0
995100      G Dumpsters                        $550           56 LOAD                  $30,800            yes                   $0
995105      S Interim Clean                 $15,000              1 LS                  $15,000            yes                   $0
995110      S Final Cleanup                      $0           75000 SF                 $ 9,000            yes                   $0
995120      S Clean Glass                Inc. Above               0 SF                      $0            yes                   $0
951151      S Chutes/Hoppers                   None               0 EA                      $0            yes                   $0
995220      S Gen. Weather Protection        Trades               0 LS                      $0            yes                   $0
995250      S Snow Removal                     None               0 LS                      $0            yes                   $0
995670      G Survey Equipment                 None               0 LS                      $0            yes                   $0
995710      G Record Storage                   $500               1 LS                    $500            yes                   $0
995860      G Small Tools/Suppliers              $1               0 LS                     $0             yes                   $0
995870      G Small Staff Gear                   $1               0 LS                     $0             yes                   $0
996220      G Water Consumption                 $25               0 MO                     $0             yes                   $0
996320      S Temporary Heat                   None               0 MO                     $0             yes                   $0
996420      S Temp. Electric Hookup          $1,500               0 LS                     $0             yes                   $0
996420      G Temp Elec. Consumption             $1               0 MO                     $0             yes                   $0
996510      S Watchmen/Security                None               0 MO                     $0             yes                   $0
996600      G Temp Fire Extinguishers           $40               0 EA                     $0             yes                   $0

Subtotal Field Office Support                                                         $55,300                                   $0

Construction Services                                                                $350,141                              $62,754
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
                                Schedule 7.2.1

                       Example of Added Fee Calculation

                          GENERAL CONDITIONS SUMMARY

Job Name:        400 Minuteman Drive - Tenant Work
Location:        Andover, MA
Prepared by:     WKU
State Job in:    MA    Estimate Type:                              Saft:
====================================================================================================================================
<S>                          <C>            <C>                    <C>                         <C>                        <C>
BUDGET:                      $0
PRECON SCHEDULE:                            Through                                             0.00 MONTHS
CONSTR. SCHEDULE:              1/31/00      Through                  3/3/00                     1.07 MONTHS
====================================================================================================================================
TOTALS                                      DIRECT LABOR           OH & BURDEN                 DIRECT COST                TOTALS
------------------------------------------------------------------------------------------------------------------------------------
PRECONSTRUCTION
BP 902        Regional Labor                        $0                    $0                                                   $0
BP 900        Field Labor                           $0                    $0                                                   $0
BP 908        Regional Support                                                                         $0                      $0
------------------------------------------------------------------------------------------------------------------------------------
TOTAL PRECONSTRUCTION                               $0                    $0                           $0                      $0
              Percent of Budget                                                                              #DIV/0!
------------------------------------------------------------------------------------------------------------------------------------
CONSTRUCTION
BP 922        Regional Labor                    $2,228                $2,674                                               $4,901
BP 920        Field Labor                      $15,895                $7,558                                              $23,453
BP 928        Regional Support                                                                                               $365
BP 925        Field Office Operations                                                             $84,211                  $8,421
BP 926        Field Office Support                                                                     $0                      $0
------------------------------------------------------------------------------------------------------------------------------------
TOTAL CONSTRUCTION                            $18,123                $10,231                       $8,786                 $37,140
              Percent of Budget                                                                              #DIV/0!
TOTAL GENERAL CONDITIONS                      $18,123                $10,231                       $8,786                 $37,140
              Percent of Budget                                                                              #DIV/0!
BOND REQUIRED?                 No                  $0        Calculates from budget above                                      $0
BUILDER'S RISK INSUR.           0                  $0            "                                                             $0
BUILDING PERMIT                 0                  $0            "                                                             $0
STATE SALES TAX                 0                  $0                                                                          $0
PROFESSIONAL LIAB.              0                  $0        .00186 up to $1 mil                                               $0
GENERAL LIABILITY         0.00416                  $0        Get Quote if Prof Liab (greater than) $1 mil                      $0
TOTAL ALL COSTS                                                                                                           $37,140
FEE ANALYSIS
Total Raw Labor                               $18,123
Excess OH                                          $0
Base fee on Budget          0.00%                  $0
Base Fee Plus Excess Overhead                      $0
Less Non-reimbursables                         $5,266
NET FEE                                       ($5,266)
ROL                                             (0.29)
<CAPTION>
RATE TABLE
<S>               <C>      <C>                 <C>    <C>                                                                  <C>
Home Office                  Field Rates        GBCo     MIS =  2.00
     Excess OH      0.00%    Excess OH         0.00%   NON REIMBURSABLE ITEMS
     Fringes       44.00%    Taxes             10.49%  Precon discounting                                                    0
     Overhead      76.00%    Work Cmp          10.10%  ?                                                                     0
TOTAL             220.00%    Maj Med           19.46%  ?                                                                     0
Escalation                   Vacation           7.50%  ?                                                                     0
     Precon         0.00%    TOTAL             47.55%  ?                                                                     0
     Const.         0.00%                              TOTAL                                                                 0
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description        Unit Rate         Quantity      Man Hours    Total Cost    Reimbursable       Total
Code                                                                                                 yes or no    Non-Reimbursable

<S>                                     <C>               <C>           <C>          <C>           <C>            <C>
B.P. 902     PRECONSTRUCTION -
             REGIONAL LABOR
992110       R Project Executive              $346              0 Dys          0            $0            yes                 $0
992200       R Scheduling                     $288              0 Dys          0            $0            yes                 $0
992300       R Accounting Dept                $210              0 Dys          0            $0            yes                 $0
992170       R Cost Accounting                $262              0 Dys          0            $0            yes                 $0
992400       R Purchasing, Support
             (Carry None)                     $  0          In below Dys       0            $0            yes                 $0
992400       R Purchasing, PA
              3.5 day per BP                  $212              0 Dys          0            $0            yes                 $0
992520       R Chief Estimator                $365              0 Dys          0            $0            yes                 $0
992530       R Electrical Estimator           $315              0 Dys          0            $0            yes                 $0
992540       R Mechanical Estimator           $297              0 Dys          0            $0            yes                 $0
992540       R Plumbing/FP Estimator          $196              0 Dys          0            $0            yes                 $0
992550       R Architectural Estimator        $212              0 Dys          0            $0            yes                 $0
992560       R Est Exec, Job Capt             $288              0 Dys          0            $0            yes                 $0

Subtotal Regional Bare Labor                                    0 Dys          0            $0                                $0

            Escalation    0.00%                                                             $0                                $0

Subtotal Escalation                                                                         $0                                $0

982500     G Excess OH     0.00%                                                            $0                                $0
000098     G. Fringes     44.00%                                                            $0                                $0
000099     G Overhead     76.00%                                                            $0                                $0

Subtotal Fringes & Overhead                                                                 $0                                $0

B.P. 900   PRECONSTRUCTION - FIELD LABOR

991001     P Project Executive                $346              0 Dys          0            $0            yes                 $0
991010     P Project Manager                  $269              0 Dys          0            $0            yes                 $0
991500     P Project Engineer                 $173              0 Dys          0            $0            yes                 $0
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description        Unit Rate         Quantity      Man Hours    Total Cost    Reimbursable       Total
Code                                                                                                yes or no    Non-Reimbursable

<S>                                     <C>               <C>           <C>          <C>           <C>           <C>
     ?      P Est Exec                          $288            0 Dys          0            $0           yes            $0
991630      P Project Estimator                 $212            0 Dys          0            $0           yes            $0

Subtotal Field  Bare Labor                                      0 Dys          0            $0                          $0

           Escalation       0.00%                                                           $0                          $0

Subtotal Escalation                                                                         $0                          $0

982500     G Excess Overhead     0.00%                                                      $0                          $0
981010     G Fed/State Taxes    10.49%                                                      $0                          $0
981030     G Worker's Comp.     10.10%                                                      $0                          $0
981050     G Major Medical      19.46%                                                      $0                          $0
982300     G Accrued Vacation    7.50%                                                      $0                          $0

Subtotal Field Burden                                                                       $0                          $0

Total Preconstruction Labor                                                                 $0                          $0

B.P. 908   PRECONSTRUCTION -
           REGIONAL SUPPORT

992650     G Travel - Auto from ?                 ?             0 Trips                     $0           yes            $0
992650     G Travel - Auto from ?                 ?             0 Trips                     $0           yes            $0
992700     G Stationary/Supplies                 $0             0 MO                        $0           yes            $0
992710     G Bid Document printing, shipping      ?             0 Sets                      $0           yes            $0
992720     G MIS Services                        $2               MH                        $0           yes            $0
992730     G Postage                            $25             0 MO                        $0           yes            $0
992740     G Photocopy                          $25             0 MO                        $0           yes            $0
992750     G Telephone                          $50             0 MO                        $0           yes            $0
992755     G Miscellaneous out of pocket         $0             0 LS                        $0           yes            $0

Subtotal Preconstruction Support                                                            $0

Total Preconstruction                                                                       $0                          $0

</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate        Quantity   Man Hours    Total Cost    Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                     <C>               <C>           <C>          <C>           <C>          <C>


B.P. 992   CONST. -
REGIONAL LABOR NON-RECOVERABLE

992112   R Principal                             $0              0 Dys          0           $0            no                $0
992110   R Project Executive-8hrs/wk           $439              4 Dys         32       $1,756            no            $1,756
992120   R Safety Engineer                     $288              0 Dys          0           $0            no                $0
992300   R Accounting                          $210              1 Dys          8         $210            no              $210
992170   R Cost Accountant 1 dy/mo             $262              1 Dys          8         $262            no              $262
992200   R Scheduling, updates                 $288              0 Dys          0           $0            no                $0
992400   R Purchasing Agent 3.5
          day per BP                           $239              0 Dys          0           $0            no                $0
992400   R Purchasing, Support                   $0              In             0           $0            no                $0
                                                                 above
                                                                 Dys
992185  R Technology Set-up                    $192              0 Dys          0           $0            no                $0
992185  R Technology Support (2dy/month)       $192              0 Dys          0           $0            no                $0
992540  R Mechanical Estimator                 $297              0 Dys          0           $0            no                $0
992540  R Plumbing, FP Estimator               $196              0 Dys          0           $0            no                $0
992530  R Electrical Estimator                 $315              0 Dys          0           $0            no                $0
992550  R Architectural Estimator              $212              0 Dys          0           $0            no                $0
992560  R Est Exec, Job Captain                $288              0 Dys          0           $0            no                $0

Subtotal Regional Bare Labor                                     6 Dys          4       $2,228                          $2,228

           Escalation       0.00%                                                           $0                              $0

Subtotal Escalation                                                                         $0                              $0
   982500  G Excess OH      0.00%                                                           $0                              $0
   000098  G Fringes       44.00%                                                       $  980                            $980
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description            Unit Rate          Quantity    Man Hours   Total Cost     Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                     <C>               <C>           <C>          <C>           <C>          <C>


000099     G Overhead    76.00%                                                        $1,693                           $1,693
Subtotal Fringes & Overhead                                                            $2,674                           $2,674

</TABLE>

<TABLE>
<CAPTION>

B.P. 920  CONSTRUCTION - FIELD LABOR    1.07 mnth = 4.63 weeks

                                        If you change the duration unit (weeks to days), change man hour calc. too.
<S>                                     <C>               <C>           <C>          <C>           <C>          <C>
991001    P Sr. Project
          Manager-DeForest                      $360            6 Dys         48          $2,160         yes                  $0
991010    P Project Manager-Driscoll          $1,346         4.63 Wks        185          $6,232         yes                  $0
          P Completion Bonus, 9% PM,
           12% on site PX                       9.00%                                       $820         yes                  $0
991020    P Asst. Project Manager                               0 Wks          0              $0         yes                  $0
991200    P General Superintendent                              0 Wks          0              $0         yes                  $0
991210    P Asst. Superintendent                                0 Wks          0              $0         yes                  $0
991220    P Area Superintendent                                 0 Wks          0              $0         yes                  $0
991240    P Mech. Superintendent                                0 Wks          0              $0         yes                  $0
991250    P Elect. Superintendent                               0 Wks          0              $0         yes                  $0
991410    P Computer Consultant                                 0 Dys          0              $0         yes                  $0
991500    P Project Engineer                                    0 Wks          0              $0         yes                  $0
991510    P. Asst. Project Engineer             $989         4.63 Wks        185          $4,579         yes                  $0
991050    P Project Acct, 1 dy/wk               $193         4.63 day         37            $894         yes                  $0
991670    P Technical Asst.                     $121           10 Dys         80          $1,210         yes                  $0
991630    P Project Estimator                                   0 Wks          0              $0         yes                  $0
991650    P Project Scheduler                                   0 Wks          0              $0         yes                  $0
Subtotal Field Bare Labor                                                    535         $15,895                              $0

           Escalation            0.00%                                                        $0                              $0

Subtotal Escalation                                                                           $0                              $0

   992500  G Excess Overhead     0.00%                                                        $0                              $0
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description            Unit Rate          Quantity   Man Hours     Total Cost   Reimbursable       Total
Code                                                                                                   yes or no    Non-Reimbursable

<S>                                     <C>               <C>           <C>          <C>           <C>          <C>

981010     G Fed/State Taxes   10.49%                                                     $1,667                                $0
981030     G Worker's Comp.    10.10%                                                     $1,605                                $0
981050     G Major Medical     19.46%                                                     $3,093                                $0
982300     G Accrued Vacation   7.50%                                                     $1,192                                $0

Subtotal Field Burden                                                                     $7,558                                $0

Total Construction Labor                                                                 $28,354                            $4,901

B.P. 928  CONST. -
REGIONAL SUPPORT NON RECOVERABLE

992650     G Travel - Auto from CT.            $56            4 Trips                      $224           no                  $224
992650     G Travel - Auto from Prov.            ?            0 Trips                        $0           no                    $0
992700     G Stationary/Supplies                                 0 MO                        $0           no                    $0
992720     G MIS Charges - GBCo              $2.00              48 MH                       $96           no                   $96
992740     G Photocopying - Rgnl               $20               1 MO                       $20           no                   $20
992730     G Postage                           $25               1 MO                       $25           no                   $25
992750     G Telephone - Rgnl                   $0               0 MO                        $0           no                    $0
992755     G Miscellaneous; Out of pocket       $0               0 LS                        $0           no                    $0

Subtotal Regional Support                                                                  $365                               $365

B.P. 925  CONSTRUCTION - FIELD OFFICE
OPERATIONS

991700     G Subsistence/Moving                $500              1 Allow                   $500         yes                     $0
991710     G Relocation Payroll                  $0              0 Wks                       $0         yes                     $0
991750     G Job Travel - Auto                 None              0 Trips                     $0         yes                     $0
991750     G Job Travel - Air                  None              0 Trips                     $0         yes                     $0
991751     G Site Vehicle Lease                $600              2 MO                    $1,200         yes                     $0
991752     G Site Vehicle fuel/Maintain        $200              2 MO                      $400         yes                     $0
</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description              Unit Rate        Quantity    Man Hours   Total Cost    Reimbursable       Total
Code                                                                                                  yes or no    Non-Reimbursable

<S>                                           <C>              <C>        <C>          <C>           <C>          <C>
   993005  G Setup/Demob Fld Office                $500          1 LS                        $500            yes           $0
   993010  G Gilbane Fld Office Rent               $400          2 MO                        $800            yes           $0
   993010  G Own/AE Fld Office                     None          0 MO                          $0            yes           $0
   993020  G Fld Office Furniture                  $500          0 EA                          $0            yes           $0
   993015  S Fld Office Janitor                     $40          0 MO                          $0            yes           $0
   994010  G Stationary/Supplies                   $500          0 LS                          $0            yes           $0
   994020  G Postage, Overnite                     $150          0 MO                          $0            yes           $0
   994030  G Misc Office Equip                       $0          0 EA                          $0            yes           $0
   994035  G Fax Machine                           $350          0 LS                          $0            yes           $0
   994040  G Telephone use                       $1,500          2 MO                      $3,000            yes           $0
   994050  G Phones and Radios                       $1          0 LS                          $0            yes           $0
   994055  G Trailer lap top Comp, Prolog, MS
           of. 1 set up                          $5,970          0 EA                          $0            yes           $0
   994055  G Office Desk top Comp., Prolog,
           MS Off., 1 ea                         $3,570          0 EA                          $0            yes           $0
   994055  G Sire Printer, 500 to 1500 range
           each                                      $0          0 EA                          $0            yes           $0
   994055  G Site Primavera Lease                   $95          0 MO                          $0            yes           $0
   994056  G MIS Charges (field Only)                $2        535 Hrs                     $1,071            yes           $0
   994060  G Site trailer Lighting                 $100          0 MO                          $0            yes           $0
   994070  G Site trailer Heat                     $100          0 MO                          $0            yes           $0
   994080  G Coffee/Water                           $75          2 MO                        $150            yes           $0
   994100  G First Aid                             $500          0 LS                          $0            yes           $0
   992710  G Bid Document printing, shipping         $0          0 Allow                       $0            yes           $0
   994210  G Shop Drawing Printing               $1,000          0 LS                          $0            yes           $0
   994220  G Record Document Printing                $0          0 Sets                        $0            yes           $0
   994240  G Photocopier rental                    $400          2 MO                        $800            yes           $0
                                                                                               $0                          $0
Subtotal Field Office Operations                                                           $8,421                          $0

</TABLE>
<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost         Description                         Unit Rate     Quantity   Man Hours  Total Cost    Reimbursable         Total
Code                                                                                                yes or no      Non-Reimbursable
<S>                                            <C>             <C>        <C>        <C>           <C>             <C>

B.P. 926 CONSTRUCTION -
FIELD OFFICE SUPPORT

993025  G Storage Trailer                             None        0 MO                  $0               yes               $0
993035  G Temporary Toilets, 2 each                   $130        0 MO                  $0               yes               $0
993035  S Trailer Temp plumbing                          ?        0 LS                  $0               yes               $0
993040  S Temporary Fencing                             $8        0 LF                  $0               yes               $0
993050  G Project Signs, (Main & Safety)            $1,000        0 EA                  $0               yes               $0
993060  S Sidewalk Overhead Protection                None        0 LF                  $0               yes               $0
993070  S Safety rails, opening protection            None        0 LF                  $0               yes               $0
993081  S Gang ladders, temp stairs                   None        0 LF                  $0               yes               $0
993080  S Safety Consultant                    By regional        0 EACH                $0               yes               $0
993080  G Safety, misc material, incentives           $500        0 LS                  $0               yes               $0
993089  G Drug Testing costs                           $50        0 EA                  $0               yes               $0
995040  G Progress Photos                              $50        0 week                $0               yes               $0
995055  S Field Eng. Services                       Trades        0 Wks                 $0               yes               $0
9950??  S Preconstruction Site Survey               Trades        0 Wks                 $0               yes               $0
995060  S Pest Control                              Trades        0 MO                  $0               yes               $0
995070  G Ceremonies                                  None        0 LS                  $0               yes               $0
995080  S Testing                                       $0        0 ALLW                $0               yes               $0
995090  G Misc advertising costs                        $0        0 ALLW                $0               yes               $0
995100  G Dumpsters                                   $550        0 LOAD                $0               yes               $0
995105  S Interim Clean                         $15,000.00        0 LS                  $0               yes               $0
995110  S Final Cleanup                              $0.12        0 SF                  $0               yes               $0
995120  S Clean Glass                           Inc. Above        0 SF                  $0               yes               $0
995115  S Chutes/Hoppers                              None        0 EA                  $0               yes               $0
995220  S Gen. Weather Protection                   Trades        0 LS                  $0               yes               $0
995250  S Snow Removal                                None        0 LS                  $0               yes               $0
995670  G Survey Equipment                            None        0 LS                  $0               yes               $0

</TABLE>

<PAGE>

                           GENERAL CONDITIONS DETAIL

Job Name:     400 Minuteman Drive - Tenant Work
Location:     Andover, MA
Prepared by:  WKU
State Job in: MA                            Duration: 5.97 Mnth    Sqft: 10,000
                                                               [logo of Gilbane]

<TABLE>
<CAPTION>
Cost                 Description        Unit Rate      Quantity     Man Hours     Total Cost    Reimbursable       Total
Code                                                                                             yes or no    Non-Reimbursable
<S>                                     <C>            <C>          <C>           <C>           <C>           <C>



995710  G Record Storage                   $500          0 LS                           $0            yes             $0
995860  G Small Tools/Supplies               $1          0 LS                           $0            yes             $0
995870  G Small Staff Gear                   $1          0 LS                           $0            yes             $0
996220  G Water Consumption                 $25          0 MO                           $0            yes             $0
996320  S Temporary Heat                   None          0 MO                           $0            yes             $0
996420  S Temp. Electric Hookup          $1,500          0 LS                           $0            yes             $0
996420  G Temp Elec. Consumption             $1          0 MO                           $0            yes             $0
996510  S Watchmen/Security                None          0 MO                           $0            yes             $0
996600  G Temp Fire Extinguishers           $40          0 EA                           $0            yes             $0

Subtotal Field Office Support                                                           $0                            $0

TOTAL CONSTRUCTION SERVICES                                                        $37,140                        $5,266
</TABLE>