Document:

<PAGE>

                                                                   EXHIBIT 10.37

                                LEASE AGREEMENT

                                    BETWEEN

                              LV ASSOCIATES, L.P.

                                      AND

                            VIROPHARMA INCORPORATED
<PAGE>

                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<S>                                                                       <C>
 1.  REFERENCE DATA:.....................................................   3
 2.  DEMISE:.............................................................   6
 3.  CONSTRUCTION:.......................................................   6
 4.  TERM:...............................................................   9
 5.  BASE RENT:..........................................................  10
 6.  RENTAL ADJUSTMENTS:.................................................  10
 7.  SECURITY DEPOSIT:...................................................  14
 8.  REPAIRS, MAINTENANCE AND SERVICES:..................................  14
 9.  NO OTHER SERVICES BY LANDLORD:......................................  16
10.  INSURANCE:..........................................................  17
11.  CASUALTY:...........................................................  18
12.  CONDEMNATION:.......................................................  19
13.  TENANT'S FIXTURES:..................................................  20
14.  ALTERATIONS:........................................................  20
15.  MECHANICS' LIENS:...................................................  20
16.  USE OF PREMISES:....................................................  20
17.  RULES & REGULATIONS:................................................  21
18.  GOVERNMENTAL REGULATIONS:...........................................  21
19.  SIGNS:..............................................................  21
20.  LANDLORD'S ENTRY:...................................................  21
21.  INDEMNIFICATION:....................................................  21
22.  CURING DEFAULTS:....................................................  23
23.  DEFAULT:............................................................  24
24.  QUIET ENJOYMENT:....................................................  26
25.  ASSIGNMENT AND SUBLETTING:..........................................  26
26.  SUBORDINATION:......................................................  28
27.  ESTOPPEL CERTIFICATES:..............................................  28
28.  SURRENDER:..........................................................  29
29.  HOLDING OVER:.......................................................  29
30.  NOTICES:............................................................  29
31.  BROKER:.............................................................  29
32.  DEFINITION OF PARTIES:..............................................  29
33.  TENANT'S RENEWAL OPTION:............................................  30
34.  SUBMISSION OF LEASE TO TENANT:......................................  30
35.  LANDLORD'S WAIVER...................................................  30
36.  LANDLORD'S WARRANTIES AND COVENANTS.................................  30
37.  WAIVERS OF JURY TRIAL AND CERTAIN DAMAGES:..........................  31
38.  EXPANSION OPTION:...................................................  31
39.  MISCELLANEOUS:......................................................  33
</TABLE>

                                      -2-
<PAGE>

                                LEASE AGREEMENT

     AGREEMENT OF LEASE made  as of the ____ day of September, 2001, by and
between LV Associates, L.P. Partnership with its principal place of business at
55 Country Club Drive, Downingtown, PA  19335  ("Landlord"), and ViroPharma
Incorporated with its principal place of business 405 Eagleview Blvd., Exton, Pa
19341 ("Tenant").

     WITNESSETH THAT, for and in consideration of the rents, covenants and
agreements herein contained and intending to be legally bound hereby, the
parties hereto covenant and agree as follows:

1.  REFERENCE DATA:  As used in this Lease, the following terms shall be defined
as indicated and refer to the data set forth in this Section 1.

          a)   TENANT'S ADDRESS:

          405 Eagleview Blvd.
          Exton, Pa 19341
          Atten: Chief Financial Officer

          b)   TENANT'S COUNSEL ADDRESS:

          Pepper Hamilton LLP
          Suite 400
          1235 Westlakes Drive
          Berwyn, PA 19312

          c)   PREMISES: The entire two-story office building (the "Building")
to be built on the parcel of real property known as Lot 8, 200-398 Eagleview
Boulevard, Exton, Pennsylvania, as such real property is described on Exhibit A
attached hereto and made a part hereof (the "Land") along with related parking
areas, site improvements and common areas, known as 397 Eagleview Boulevard. The
Premises shall be approximately 32,182 square feet of space located within the
Building which Premises shall consist of 25,000 square feet of office space (the
"Office Space") and 7,182 square feet of unimproved shell space ("Shell Space").
These initial Premises may be referred to hereinafter as "Phase One". The Land,
the Building and the Premises are sometimes referred to as the "Property". The
Premises may be expanded to include up to an additional 32,182 square feet of
space in a second building to be constructed adjacent to the Building and 4,604
square feet in a connector between the two buildings upon Tenant's election to
exercise its Phase Two Option as set forth in Section 38 of this Lease. In the
event Tenant exercises its Phase Two Option, the expansion of the Premises in
accordance with such terms shall be referred to as Phase Two.

          d)   TERM: The term (the "Term") of this Lease shall be fifteen (15)
years, unless otherwise extended or sooner terminated pursuant to the terms
hereof. The Term shall commence on the Commencement Date (as hereinafter
defined) and, unless extended or sooner terminated, shall expire on the last day
of the month which is one hundred eighty (180) full consecutive calendar months
thereafter (such date the "Expiration Date"). The term "Lease Year" shall mean

                                      -3-
<PAGE>

each consecutive twelve month period beginning on the first day of the first
calendar month following the Commencement Date if the Commencement Date is not
the first day of a calendar month, and, in such case, the first Lease Year shall
include the days during the Term occurring before the first day of the first
calendar month following the Commencement Date.

          e)   ANTICIPATED COMMENCEMENT DATE: The Term "Anticipated Commencement
Date" shall mean the date which is nine (9) months following the date this Lease
is fully executed.

          f)   BASE RENT: During the Term, Base Rent shall be paid in accordance
with the following schedule on the first day of each calendar month during the
Term:

Office Space:

    --------------------------------------------------------------------------
                                 Rate Per
     Lease        Rentable       Rentable          Yearly            Monthly
      Year         Sq. Ft.       Sq. Foot           Rate          Installment
    -------------------------------------------------------------------------
       1           25,000         $19.00         $474,968.33       $39,580.69
    -------------------------------------------------------------------------
       2           25,000         $19.38         $484,467.70       $40,372.31
    -------------------------------------------------------------------------
       3           25,000         $19.77         $494,157.05       $41,179.75
    -------------------------------------------------------------------------
       4           25,000         $20.16         $504,040.20       $42,003.35
    -------------------------------------------------------------------------
       5           25,000         $20.56         $514,121.00       $42,843.42
    -------------------------------------------------------------------------
       6           25,000         $20.98         $524,403.42       $43,700.28
    -------------------------------------------------------------------------
       7           25,000         $21.40         $534,891.49       $44,574.29
    -------------------------------------------------------------------------
       8           25,000         $21.82         $545,589.32       $45,465.78
    -------------------------------------------------------------------------
       9           25,000         $22.26         $556,501.10       $46,375.09
    -------------------------------------------------------------------------
       10          25,000         $22.71         $567,631.13       $47,302.59
    -------------------------------------------------------------------------
       11          25,000         $23.16         $578,983.75       $48,248.65
    -------------------------------------------------------------------------
       12          25,000         $23.62         $590,563.42       $49,213.62
    -------------------------------------------------------------------------
       13          25,000         $24.09         $602,374.69       $50,197.89
    -------------------------------------------------------------------------
       14          25,000         $24.58         $614,422.19       $51,201.85
    -------------------------------------------------------------------------
       15          25,000         $25.07         $626,710.63       $52,225.89
    -------------------------------------------------------------------------

                                      -4-
<PAGE>

Shell Space:

    -------------------------------------------------------------------------
                                 Rate Per
     Lease        Rentable       Rentable          Yearly            Monthly
      Year         Sq. Ft.       Sq. Foot           Rate          Installment
    -------------------------------------------------------------------------
       1           7,182          $15.00         $107,730.00       $ 8,977.50
    -------------------------------------------------------------------------
       2           7,182          $15.30         $109,884.60       $ 9,157.05
    -------------------------------------------------------------------------
       3           7,182          $15.61         $112,111.02       $ 9,342.59
    -------------------------------------------------------------------------
       4           7,182          $15.92         $114,337.44       $ 9,528.12
    -------------------------------------------------------------------------
       5           7,182          $16.24         $116,635.68       $ 9,719.64
    -------------------------------------------------------------------------
       6           7,182          $16.56         $118,933.92       $ 9,911.16
    -------------------------------------------------------------------------
       7           7,182          $16.89         $121,303.98       $10,108.67
    -------------------------------------------------------------------------
       8           7,182          $17.23         $123,745.86       $10,312.16
    -------------------------------------------------------------------------
       9           7,182          $17.57         $126,187.74       $10,515.65
    -------------------------------------------------------------------------
       10          7,182          $17.92         $128,701.44       $10,725.12
    -------------------------------------------------------------------------
       11          7,182          $18.28         $131,286.96       $10,940.58
    -------------------------------------------------------------------------
       12          7,182          $18.65         $133,944.30       $11,162.03
    -------------------------------------------------------------------------
       13          7,182          $19.02         $136,601.64       $11,383.47
    -------------------------------------------------------------------------
       14          7,182          $19.40         $139,330.80       $11,610.90
    -------------------------------------------------------------------------
       15          7,182          $19.79         $142,131.78       $11,844.32
    -------------------------------------------------------------------------

Landlord and Tenant agree and acknowledge that the square footages of the Office
Space and the Shell Space as set forth above may differ from the actual square
footages which are constructed.  The parties agree that upon Substantial
Completion of the Tenant Work, either Landlord or Tenant may have the Premises
measured by an architect (reasonably acceptable to both Landlord and Tenant) who
shall measure same in accordance with 1996 BOMA standards (for single tenant
buildings) and to the extent the actual square footages differ from those stated
above, the parties shall execute the Confirmation of Lease Term Agreement
attached hereto as Exhibit B which shall set forth the actual square footages
and Base Rent calculations.  In addition to the foregoing, in the event Tenant
elects to convert Shell Space to Office Space, upon substantial completion of
Tenant's Work, as related to such conversion, and any measurement as provided
above, appropriate adjustments in the Base Rent schedules shall be made and
confirmed in an addendum to this Lease which shall be executed by both the
Landlord and Tenant.

          g)   ADDITIONAL RENT: Sums not including Base Rent which Tenant is
obligated to pay to Landlord from time to time pursuant to the terms of this
Lease.

          h)   SECURITY DEPOSIT: $48,558.19.

          i)   TENANT'S PROPORTIONATE SHARE: Shall be determined by dividing the
area of the Premises by the area of the Building or if the Second Building is
constructed, the area of the Building and the Second Building.

          j)   PERMITTED USES: Tenant may use and occupy the Premises for
general office use and all other uses ancillary to Tenant's operations provided
such uses are permitted under

                                      -5-
<PAGE>

the Uwchlan Township Zoning Ordinance and applicable protective covenants
recorded prior to the date hereof, and for no other purpose.

          k)   "HAZARDOUS SUBSTANCES" means, (i) asbestos and any asbestos
containing material and any substance that is then defined or listed in, or
otherwise classified pursuant to, any Environmental Laws or any applicable laws
or regulations as a "hazardous substance", "Hazardous Material", "hazardous
waste," "infectious waste", "toxic substance", "toxic pollutant" or any other
formulation intended to define, list, or classify substances by reason of
deleterious properties such as ignitability, corrosivity, reactivity,
carcinogenicity, toxicity, reproductive toxicity, or Toxicity Characteristic
Leaching Procedure (TCLP) toxicity, (ii) any petroleum and drilling fluids,
produced waters, and other wastes associated with the exploration, development
or production of crude oil, natural gas, or geothermal resources and (iii)
petroleum products, polychlorinated biphenyls, urea formaldehyde, radon gas,
radioactive material (including any source, special nuclear, or by-product
material), and medical waste.

          l)   "ENVIRONMENTAL LAWS" collectively means and includes all present
and future laws and any amendments thereto (whether common law, statute, rule,
order, regulation or otherwise), permits, and other requirements or guidelines
of governmental authorities applicable to the Premises and relating to the
environment and environmental conditions or to any Hazardous Substance
(including, without limitation, CERCLA, 42 U.S.C (S)601, et seq, the Resource
Conservation and Recovery Act of 1976, 42 U.S.C (S)901, et seq, the Hazardous
Materials Transportation Act, 49 U.S.C. (S)801, et seq, the Federal Water
Pollution Control Act, 33 U.S.C. (S)51, et seq, the Clean Air Act, 33 U.S.C.
(S)401, et seq, the Clean Air Act, 42 U.S.C. (S)41, et seq, the Toxic Substances
Control Act, 15 U.S.C. (S)601-2629, the Safe Drinking Water Act, 42 U.S.C.
(S)00f-300j, the Emergency Planning and Community Right-to-Know Act, 42 U.S.C.
(S)101, et seq, and any so-called "Super Fund" or "Super Lien" law, any law
requiring the filing of reports and notices relating to hazardous substances,
environmental laws administered by the Environmental Protection Agency, and any
similar state and local laws and regulations, all amendments thereto and all
regulations, orders, decisions, and decrees now or hereafter promulgated
thereunder concerning the environment, industrial hygiene or public health or
safety).

2.   DEMISE:  Landlord hereby demises and lets to Tenant and Tenant hereby hires
and leases from Landlord the Premises for the Term, upon the conditions and
limitations set forth herein.

3.   CONSTRUCTION:

          a)   Landlord shall provide, at its sole cost and expense, all labor,
materials and expertise necessary for the construction and improvement of the
Building, and if Tenant exercises the Phase Two Option, the Second Building,
parking lots with a minimum of four (4) parking spaces per each one thousand
rentable square feet contained within the Premises as same may be adjusted from
time to time, sidewalks, utility services (including gas, electric, water and
sewer), storm water management and all other base building and site work
contemplated for Phase One (collectively, the "Base Building and Site Work") as
such base building work is preliminarily described in the plans and
specifications attached hereto as Exhibit C and as such site work is described
in the plans and specifications attached hereto as Exhibit C ("Base Building and
Site Work Plans"). Following full execution of this Lease, Landlord shall
prepare final base building plans and specifications which shall be consistent
with the preliminary plans and specifications

                                      -6-
<PAGE>

attached hereto as Exhibit C and deliver such final plans and specifications to
Tenant for Tenant's review and approval which shall not be unreasonably
withheld, conditioned or delayed (so long as the final plans and specifications
are consistent with the preliminary plans and specifications) and which shall be
given or denied within five (5) business days following receipt thereof. If
Tenant fails to approve such final plans and specifications within such five (5)
day period, they shall be deemed approved. Upon approval (or deemed approval)
the final base building plans and specifications shall be attached to this Lease
as a final Exhibit C and such plans and specifications together with the site
work plans and specifications shall thereafter be deemed the Base Building and
Site Work Plans. If Tenant disapproves of the final base building plans and
specifications the parties shall mutually endeavor to make such revisions as may
be necessary to cause such plans and specifications to be acceptable to both
parties. All Base Building and Site Work shall be performed or caused to be
performed by Landlord in a good and workmanlike manner in conformity with the
Base Building and Site Work Plans and in accordance with all applicable Federal,
state and local laws, ordinances, regulations and lawful orders of public
authorities ("Laws"). Landlord shall comply with and give all notices required
by Laws bearing on performance of the Base Building and Site Work. Landlord
shall be responsible for initiating, maintaining and supervising all safety
precautions and programs in connection with performance of the Base Building and
Site Work. The Base Building and Site Work shall be performed by Landlord in
accordance with the Base Building and Site Work Schedule attached hereto as
Exhibit D.

          b)   Landlord shall provide to Tenant a work allowance ("Tenant Work
Allowance") equal to Twenty Five Dollars ($25.00) per rentable square foot
contained within the Premises to be used by Tenant to pay for the cost
("Tenant's Costs") of all labor, materials and expertise necessary for the
design (including all architectural and engineering services), permits,
construction and improvement of the interior of the Premises ("Tenant Work"),
the preliminary layout for which is set forth in the plans and specifications
attached as Exhibit "E" hereto ("Preliminary Tenant Work Plans") which have been
approved by the Landlord. In addition, in the event that the Tenant Work
Allowance exceeds Tenant's Costs, Tenant may utilize such excess to purchase
furniture, fixtures or equipment to be used within the Premises, to pay for the
design, construction and installation of signage (as further described below) or
to pay the first installments of Base Rent falling due under this Lease. Tenant
shall be responsible for any Tenant's Costs in excess of the Tenant Work
Allowance. Tenant shall cause all Tenant Work to be done in a good and
workmanlike manner in conformity with the Tenant Plans (defined below). Tenant
shall submit to Landlord on or before the twentieth (20th) day of each month, an
Application for Payment (in the standard American Institute of Architects form)
for Tenant's Costs executed by Tenant's construction representative, setting
forth in reasonable detail the amount of such Tenant's Costs and identifying the
material, labor, fees, and costs to which they relate. Landlord shall pay to
Tenant, or at Tenant's election, directly to Tenant's contractors,
subcontractors or materialmen, the amount of each Application for Payment within
thirty (30) days after the date on which Landlord receives Tenant's Application
for Payment until the Tenant Work Allowance is exhausted. Tenant shall provide
to Landlord such other documentation as may be reasonably requested by
Landlord's construction lender relative to Tenant's Applications for Payment.
Tenant shall only be entitled to submit one (1) Application for Payment per
calendar month. Notwithstanding anything set forth in this Subsection 3(b), any
amounts held back as retainage under contracts for the Tenant Work (each of
which shall provide for customary retainages of not less than ten percent (10%))
shall not constitute a part of Tenant's Costs unless and until paid or due to
the contractor under the terms of the subject contract. The parties anticipate
that Tenant will only perform Tenant Work in an initial 25,000 square feet which

                                      -7-
<PAGE>

is referred to above as the Office Space within Phase One at the commencement of
the Term. Tenant shall have the right during the first five (5) Lease Years,
from time to time, to complete the remainder of Tenant Work and convert the
Shell Space to Office Space and Tenant's failure to do so as of the Commencement
Date shall not relieve Landlord of its obligation to provide Tenant with the
Tenant Work Allowance on account of such Shell Space as and when such space is
converted to Office Space by Tenant. Tenant shall only be entitled to utilize
the Tenant Work Allowance (and be compensated by Landlord pursuant to this
subsection 3(b)) to the extent same is allocable to the number of rentable
square feet of Office Space being constructed from time to time by Tenant either
in connection with the Tenant Work or the conversion of Shell Space to Office
Space during the Term. Tenant shall not be entitled to the aforesaid allowance
with respect to the conversion of any Shell Space to Office Space which
commences more than five (5) years from the Commencement Date.

          c)   Tenant shall finalize the Tenant Work plans which shall be
generally consistent with the Preliminary Tenant Work Plans and shall not alter
the location or configuration of the Building lobby, elevators, stairwells or
bathrooms. Upon completion, Tenant shall submit such plans to Landlord for
approval, not to be unreasonably withheld, conditioned or delayed. Landlord
shall only be entitled to reject the Tenant Work plans if same alter the
location or configuration of the Building lobby, elevators, stairwells or
bathrooms or if the work contemplated by the plans is not generally consistent
with the quality of the improvements in Tenant's existing leased premises. If
Landlord does not either approve or reject such plans within fourteen (14) days,
the Tenant Work plans, as finalized and submitted for approval, shall be deemed
approved. Once the Tenant Work plans are approved in writing by Landlord or
deemed to have been approved by Landlord and Tenant, Tenant shall cause its
architect to prepare construction drawings and specifications for the
performance of the Tenant Work and same shall be referred to as the "Tenant
Plans". Tenant shall deliver a copy of the Tenant Plans (with any field changes
noted) to Landlord for Landlord's records following completion of the Tenant
Work.

          d)  Landlord shall use its best efforts to cause the Base Building and
Site Work to be carried forward expeditiously and with adequate work forces so
as to cause the Base Building and Site Work to be in Substantially Completed
(defined below) condition on or before the Anticipated Commencement Date, and to
otherwise be substantially completed in accordance with the Base Building and
Site Work Plans so as to permit the Tenant to construct and perform the Tenant
Work. Tenant shall not commence the Tenant Work until such time as Landlord has
provided to Tenant five (5) days prior written notice that same may be commenced
(the "Tenant Work Commencement Notice") which notice shall not be given until
such time as the Base Building and Site Work has been substantially completed in
accordance with the Base Building and Site Work Plans so as to permit the Tenant
to construct and perform the Tenant Work without interference by Landlord and
its contractors and such that upon completion of the Tenant Work Tenant will be
able to obtain a permanent certificate of occupancy permitting legal use and
occupancy of the Premises for its intended purposes (such condition shall be
deemed "Substantially Completed"). Landlord shall promptly advise Tenant of any
changes to the Base Building and Site Work which it implements prior to or
during construction to address field conditions to enable Tenant, to the extent
possible to incorporate any changes necessary into the Tenant Plans, the costs
of which (to the extent in excess of $500.00) shall be the obligation of
Landlord. Notwithstanding the foregoing, the Anticipated Commencement Date set
forth in the Base Building and Site Work Schedule shall be subject to extension
for any time that Landlord and/or its contractor's are unable to perform the
Base Building

                                      -8-
<PAGE>

and Site Work due to strikes, labor disputes, governmental restrictions or
limitations taking effect after the date of this Lease (other than the failure
to obtain building permits or other approvals needed to perform the Base
Building and Site Work), scarcity of or inability to obtain labor or materials,
fire or other casualties, adverse weather conditions or any cause similar or
dissimilar to the foregoing beyond the reasonable control of Landlord
(collectively, "Force Majeure"). Landlord shall secure and pay for the building
permit and all other permits and fees, licenses and inspections necessary for
the proper execution and completion of the Base Building and Site Work. Tenant
shall be obligated to obtain at its cost any permits or other approvals required
for the performance of the Tenant Work. Tenant shall comply with and give all
notices required by Laws bearing on performance of the Tenant Work. Tenant shall
be responsible for initiating, maintaining and supervising all safety
precautions and programs in connection with performance of the Tenant Work.

          e)   Landlord promptly shall correct, at Landlord's cost and expense,
all Base Building and Site Work failing to conform to the Base Building and Site
Work Plans or Laws, provided that such defect appears and Tenant gives Landlord
written notice thereof during the first Lease Year of the Term. Landlord's
obligation under this Subsection 3(e) shall survive Tenant's occupancy of the
Premises upon Substantial Completion (defined below).

          f)   Immediately prior to Tenant taking possession of the Premises for
the purpose of performing Tenant Work, Tenant and Landlord jointly shall inspect
the same in order to determine and record its condition and to prepare a
comprehensive list of items that have not been completed (or which have not been
correctly or properly completed) in substantial conformity with the Base
Building and Site Work Plans (collectively, "Punch List Items"). Landlord
thereafter shall proceed promptly to complete and correct all Punch List Items,
using commercially reasonable efforts not to disrupt or interfere with Tenant's
completion of the Tenant Work. Failure to include an item as a Punch List Item
does not alter the responsibility of Landlord to complete all Base Building and
Site Work in substantial conformity with the Base Building and Site Work

          g)   If the Base Building and Site Work is not in Substantially
Completed condition within ninety (90) days following the Anticipated
Commencement Date for reasons not attributable to Force Majeure (provided any
Force Majeure delay shall not exceed ninety (90) days). Tenant may either
terminate this Lease by providing Landlord with written notice of its election
to terminate the Lease prior to the date the Base Building and Site Work is
Substantially Completed or be entitled to receive one day of Base Rent credit
(after the Commencement Date) for every one day of delay after the Anticipated
Commencement Date.

4.   TERM:  The Term shall commence on the date (the "Commencement Date") which
is the earlier to occur of the following: (i) one hundred (100) days following
the date Tenant is authorized to commence the Tenant Work as set forth in the
Tenant Work Commencement Notice, provided, however, that such date shall be
extended (up to a maximum of thirty three (33) days for any time lost by Tenant
due to strikes, labor disputes, governmental restrictions or limitations,
scarcity of or inability to obtain labor or materials, fire or other casualties,
adverse weather conditions or any cause similar or dissimilar to the foregoing
beyond the reasonable control of Tenant or (ii) the date Tenant takes occupancy
of the Premises and commences operations therefrom in its ordinary course.
Notwithstanding the foregoing, the Term shall not commence until such time as
Landlord

                                      -9-
<PAGE>

has completed the Base Building and Site Work in accordance with the Base
Building and Site Work Plans.

5.  BASE RENT:

          a)   Tenant shall pay to Landlord during the Term of the Lease the
Base Rent, without notice or demand, in the monthly installments specified in
Section 1, in advance on the first day of each calendar month of the Term. The
first month's installment of Base Rent shall be payable upon full execution of
this Lease. If the Term commences other than on the first day of a calendar
month, then the installment of Base Rent for the first calendar month of the
Term shall be adjusted proportionately and the aforesaid first installment paid
by Tenant upon the execution of this Lease shall be initially applied to the
first partial month of the Term, and the balance to the next month.

          b)   Base Rent, Additional Rent and all other sums payable by Tenant
to Landlord hereunder shall be paid, without set-off or deduction, except as
specifically provided below, in lawful currency of the United States of America
to Landlord at the address set forth in Section 1 hereof, or at such other
address as Landlord may from time to time designate in writing to Tenant.

          c)   Tenant hereby acknowledges that late payment by Tenant to
Landlord of rent or other sums due hereunder will cause Landlord to incur costs
not contemplated by this Lease, the exact amount of which will be extremely
difficult to ascertain. Such costs include, but are not limited to, processing
and accounting charges, and late charges which may be imposed upon Landlord by
terms of any mortgage or trust deed covering the Premises. Accordingly, if any
installment of rent or any sum due from Tenant shall not be received by Landlord
or Landlord's designee within five (5) business days after said amount is due,
then Tenant shall pay to Landlord a late charge of three (3%) percent of such
overdue amount, plus reasonable attorney's fees and court costs, if any,
incurred by Landlord by reason of Tenant's failure to pay rent and/or other
charges when due hereunder. The parties hereby agree that such late charges
represent a fair and reasonable estimate of the cost that Landlord will incur by
reason of the late payment by Tenant. Acceptance of such late charges by the
Landlord shall in no event constitute a waiver of Tenant's default with respect
to such overdue amount, nor prevent Landlord from exercising any of the other
rights and remedies granted hereunder.

6.  RENTAL ADJUSTMENTS:

          a)   Tenant shall be responsible for all Operating Expenses for the
Property which shall be paid as and when due in accordance with invoices and
bills received by Tenant from such third parties providing services to the
Property or governmental authorities or in accordance with written contracts
between Tenant and such service providers and in accordance with this Lease. In
the event Landlord receives any bills or invoices for which Tenant is liable,
Landlord shall promptly forward such bills or invoices to Tenant (together with
any sums which may be due from Landlord on account thereof) and Tenant shall
make such payments due on or before the date which is the later of (i) thirty
(30) days after receipt thereof or in the event of real estate taxes (ii) twenty
(20) days prior to the end of any discount period. Any Operating Expenses on
account of periods of time either before or after the Term shall be prorated
between Landlord and Tenant and Tenant shall only be responsible for the portion
of such Operating Expense accruing during the Term.

                                      -10-
<PAGE>

          b)   "Operating Expenses" shall be defined as follows:

                    (i)   Real estate taxes and other taxes or charges levied in
lieu of such taxes, general and special public assessments, charges imposed by
any governmental authority pursuant to anti-pollution or environmental
legislation, taxes on the rentals of the Building or the use, occupancy or
renting of space therein provided, however Tenant shall have the right to
commence and pursue appeals of such taxes, in its own name or, if required by
applicable law, in the name of Landlord and Landlord shall cooperate, at
Tenant's expense, in the conduct of such appeals. Tenant shall be responsible
for making any required payments and/or posting any security during the period
of such appeals required to preserve and protect Landlord and any mortgagee from
any loss or damage, including, without limitation, the filing of any claims or
liens resulting from the taxes being appealed, during the periods such appeals
are pending.

                    (ii)  Premiums and fees for fire and extended coverage
insurance, insurance against loss of rentals for space in the Building and
public liability insurance, all in amounts and coverages (with additional
policies against additional risks) as may reasonably be required by Landlord or
the holder of any mortgage on the Building and including all insurance required
to be maintained or otherwise carried by Landlord hereunder;

                    (iii) Water, sewer, gas and electric utility service
charges;

                    (iv)  Maintenance and repair costs, including repairs and
replacements described in Section 8 below, repairs and replacements of supplies
and equipment, including repairs and maintenance (but not capital replacements)
to the HVAC system and the costs of all labor, material and supplies incidental
thereto;

                    (v)   Assessments paid by Landlord on account of the
Property for the repair, maintenance and upkeep of common facilities located in
the Business Park in accordance with the Protective Covenants (as define below).

          c)   "Operating Expense" shall not include the following:

                    (i)   Costs of repairs, restoration, replacements or other
work occasioned by (1) fire, windstorm or other casualty of an insurable nature
(whether such destruction be total or partial) and either (aa) payable (whether
paid or not) by insurance required to be carried by Landlord under this Lease,
or (bb) otherwise payable (whether paid or not) by insurance then in effect
obtained by Landlord or on Landlord's behalf, (2) the exercise by governmental
authorities of the right of eminent domain, whether such taking be total or
partial, (3) the gross negligence or intentional tort of Landlord, or any
subsidiary or affiliate of Landlord, or any representative, employee or agent of
same (including the costs of any deductibles paid by Landlord), or (4) the act
of any other tenant, or any other tenant's agents, employees, licensees or
invitees to the extent Landlord has the right to recover the applicable cost
from such person;

                    (ii)  Leasing commissions, attorney's fees (except those for
enforcing rules and regulations), costs, disbursements and other expenses
incurred in connection with negotiations for leases with tenants, other
occupants, or prospective tenants or other occupants of the Property, or similar
costs incurred in connection with disputes with tenants, other occupants, or
prospective

                                      -11-
<PAGE>

tenants, or similar costs and expenses incurred in connection with negotiations
or disputes with consultants, management agents, purchasers or mortgagees of the
Property;

                    (iii)  Allowances, concessions and other costs and expenses
incurred in completing, fixturing, furnishing, renovating or otherwise
improving, decorating or redecorating space for tenants (including Tenant),
prospective tenants or other occupants and prospective occupants of the
Property, or vacant, leasable space in the buildings on the Property;

                    (iv)   Costs of the initial construction of the Building and
repairing, replacing or otherwise correcting defects (but not the costs of
repair for normal wear and tear) in the construction of the Building or other
buildings at the Property, tenant improvements, site work or other improvements
comprising the Property;

                    (v)    Costs or expenses relating to another tenant's or
occupant's space which (1) were incurred in rendering any service or benefit to
such tenant that Landlord was not required, or were for a service in excess of
the service that Landlord was required to provide Tenant hereunder (including,
without limitation, insurance coverage for another tenant's or occupant's
leasehold improvements), or (2) were otherwise in excess of the Building
standard services then being provided by Landlord to all tenants or other
occupants in the Building, whether or not such tenant or occupant is actually
charged therefor by Landlord;

                    (vi)   Payments of principal and interest or other finance
charges made on any debt and rental payments made under any ground or underlying
lease or leases, except to the extent that a portion of such rental payments is
expressly for ad valorem/real estate taxes, interest charges and increased
property as a result of such action;

                    (vii)  Costs incurred in connection with sales, financing,
refinancing, mortgaging, selling or change of ownership of the Property,
including brokerage commissions, attorneys' and accountants' fees, closing
costs, title insurance premiums, transfer taxes as a result of such action,
interest charges;

                    (viii) Costs, fines, interest, penalties, legal fees or
costs of litigation incurred due to the late payments of taxes, utility bills
and other costs incurred by Landlord's failure to make such payments when due
unless caused by Tenant's failure to timely pay such taxes, utility bills and
other costs;

                    (ix)   Costs incurred by Landlord for trustee's fees,
partnership organizational expenses and accounting fees (other than auditing
fees of third party accountants);

                    (x)    Costs of a capital nature, including, without
limitation, capital improvements, capital repairs, capital equipment and capital
tools, all as determined in accordance with generally accepted accounting
principles;

                    (xi)   Landlord's general corporate overhead and general and
administrative expenses;

                                      -12-
<PAGE>

                    (xii)   Any compensation paid to clerks, attendants or other
persons in commercial concessions operated by Landlord or in the parking
garage(s) or lot(s) located at the Property;

                    (xiii)  Rentals and other related expenses incurred in
leasing air conditioning systems, elevators or other equipment ordinarily
considered to be of a capital nature;

                    (xiv)   The rent or any costs for a leasing office and the
rent in excess of the fair market rent or the imputed cost equal to the loss of
rent by Landlord for making available to the managing agent space for an on-site
management office, or any other offices or spaces of Landlord or any related
office or administrative expenses;

                    (xv)    Income and franchise taxes, special assessments
(except as provided in Subsection 6(b)(i) above) and other business taxes
payable by Landlord except those business taxes which relate solely to the
operation of the Building, if any;

                    (xvi)   All amounts which would otherwise be included in
operating expenses which are paid to any affiliate or subsidiaries of Landlord,
or any representative, employee or agent of same, to the extent the costs of
such services exceed the competitive rates for similar services of comparable
quality rendered by persons or entities of similar skill, competence and
experience;

                    (xvii)  Management fees and all other fees for management of
the Premises, the Building or the Property, except for market rate management
fees in the event Landlord constructs the Second Building and Tenant does not
elect to expand the Premises to include Phase Two or if Tenant fails to manage
Phase One and/or Phase Two in accordance with terms hereof;

                    (xviii) Costs or expenses of utilities directly metered to
tenants of buildings and payable separately by such tenants, including Tenant;

                    (xix)   Any increase in an insurance premium to the extent
that such increase is caused or attributable to the use, occupancy or act of
another tenant, it being agreed that Tenant shall be responsible for any such
increases caused by the acts or omissions of Tenant, its employees and/or
agents;

                    (xx)    Moving expense costs of tenants of the buildings on
the Property to the extent not provided by Landlord (i) to Tenant and (ii)
generally to other initial tenants of the buildings on the Property;

                    (xxi)   Advertising and promotional costs, and costs of
signs in or on the Building or the Property;

                    (xxii)  Costs incurred (less costs of recovery) for any
items to the extent covered by a manufacturer's, materialman's, vendor's or
contractor's warranty which are paid by such manufacturer, materialman, vendor
or contractor;

                                      -13-
<PAGE>

                    (xxiii)  Non-cash items, such as deductions for depreciation
and amortization of the Building, or other buildings on the Property and the
Building equipment, or interest on capital invested;

                    (xxiv)   Costs of parking garage(s) or lots(s), if any,
services provided and costs incurred in connection with the operation of the
same or retail or other ancillary operations owned, operated or subsidized by
Landlord;

                    (xxv)    Consulting costs and expenses paid by Landlord;

                    (xxvi)   The cost of any "tap fees" or one-time lump sum
sewer or water connection fees for buildings constructed or to be constructed on
the Land payable in connection with the initial construction thereof;

                    (xxvii)  Rental for any space set aside for conference
facilities, storage facilities or exercise facilities;

                    (xxviii) Wages, salaries and benefits for employees of
Landlord except to the extent equitably allocated to the Premises due to such
employee's performance of Landlord's duties at the Building, other than routine
inspections of the Premises; and

                    (xxix)   Additional costs incurred to correct violations
existing on the Commencement Date of any law, rule, order or regulation
affecting the Building or the Property beyond those costs incurred in order to
maintain the Building and Property in a state of compliance with any such law,
rule, order or regulation and any sums paid by Landlord for any fines or
penalties as a result of violation of any law, rule, order or regulation.

7.   SECURITY DEPOSIT: Upon the date hereof, Tenant shall pay to Landlord a
security deposit in the amount set forth in Section 1 hereof which Landlord will
hold as security for the faithful performance by Tenant of all of Tenant's
covenants and agreements under this Lease, but in no event shall Landlord be
obligated to apply same to rents or other charges in arrears or damages for
Tenant's default hereunder, but Landlord may so apply the security deposit at
its option. Landlord's right to possession of the Premises for Tenant's default
or any other reason shall not be affected by the fact the Landlord holds said
security deposit. The security deposit, if not so applied by Landlord, shall be
returned to Tenant within sixty (60) days after this Lease terminates, provided
that Tenant shall have vacated the Premises and delivered same to Landlord, as
herein provided. In the event of any transfer of its interest in the Premises,
Landlord shall have the right to transfer its interest in the security deposit,
and upon assumption of Landlord's obligations under this Lease by such
transferee, Landlord shall be released of all liability with respect to such
security deposit, and Tenant shall look solely to such transferee for the return
of same.

8.   REPAIRS, MAINTENANCE AND SERVICES:

          a)   Landlord shall:

                    (i)       Arrange for all required utility services to the
Premises provided, however, that Landlord shall not be liable to Tenant for any
loss or damage arising from

                                      -14-
<PAGE>

interruption in such utility services. Landlord will use its best efforts to
restore any disruption of utility service, without interfering with Tenant's
operation of its business.

                    (ii)      Repair, maintain and replace the Building
mechanical, electrical and plumbing systems, foundations, concrete floor slabs,
exterior glass panel or masonry walls, steel frame (including columns) and roof
deck as required for safety, tenantability as reasonably determined by Tenant
and compliance with proper orders of governmental authorities, provided,
however, that Landlord shall not be obligated for any of such repairs until the
expiration of a reasonable period of time after written notice from Tenant that
such repair is needed. In no event shall Landlord be obligated under this
paragraph to repair any damage caused by any act, omission or negligence of
Tenant or its employees, agents, invitees, licensees, subtenants, or
contractors. Landlord shall be responsible for correcting any defect in
construction of the Premises by its contractor and agents.

                    (iii)     To the extent required by the Protective Covenants
(the recorded document governing the construction of buildings at 200-398
Eagleview Blvd., "The Protective Covenants"), repair, maintain and replace the
parking lots, sidewalks, landscaped areas and other exterior areas and
facilities constituting the Property.

          b)   Tenant shall, throughout the Term and at its sole cost and
expense, take good care of the Premises and the other improvements now or
hereafter comprising all or any part of the Premises and the fixtures and
appurtenances therein, and maintain the same in good order and condition (in a
manner consistent with the maintenance performed at Tenant's existing premises),
including the performance of landscaping, snow removal, grounds upkeep, trash
removal and janitorial services and promptly at Tenant's own cost and expense
make all repairs necessary to maintain such good order and condition, except for
repairs, replacement and maintenance to be performed by Landlord. Tenant shall
perform all recommended HVAC maintenance in accordance with the manufacturer's
specifications and Tenant shall keep maintenance logs thereof which it shall
make available from time to time to Landlord upon forty eight hours written
request. Except to the extent released pursuant to the mutual waiver of
subrogation in Subsection 10(c) Tenant shall at its sole cost and expense repair
and replace all damage or injury to the Premises and to fixtures and equipment
caused by Tenant or its employees, agents, invitees, licensees, subtenants, or
contractors, or as the result of all or any of them moving in or out of the
Building or by installation or removal of furniture, fixtures or other property,
which repairs and replacements shall be in quality and class equal to the
original work or installations, normal wear and tear excepted. If Tenant fails
to make such repairs or replacements, the same may be made by Landlord and such
expense shall be collectible as Additional Rent and paid by Tenant within thirty
(30) days after rendition of a bill therefor.

          c)   If Landlord fails to make repairs it is obligated to perform
under this Lease within thirty (30) days after Tenant's notice (except when the
repairs require more than thirty (30) days for performance and Landlord
commences the cure within thirty (30) days and diligently pursues the repair to
completion), Tenant may, at its option, perform such repairs and deduct the
reasonable cost thereof from the installments of Base Rent next falling due.
Notwithstanding the foregoing, in the event of an emergency, Tenant may give
Landlord such shorter notice as is practicable under the circumstances, and if
Landlord fails to make such repairs immediately, Tenant

                                      -15-
<PAGE>

may immediately undertake such repairs and deduct the cost thereof from the
installments of Base Rent next falling due.

          d)   Notwithstanding anything to the contrary contained in this Lease,
Landlord agrees that during the exercise of any right of entry or making any
repairs, replacements or improvements or performing any work in the Premises
under any of the provisions of this Lease, Landlord shall use all reasonable
efforts, under the circumstances, to minimize interference with the conduct of
Tenant's business and its use of the Premises; provided, however that Landlord
shall have no obligation to employ contractors or labor at so-called overtime or
other premium pay rates or to incur any other overtime costs or expenses
whatsoever, except that Landlord, at its expense, shall employ contractors or
labor at so-called overtime or other premium pay rates if necessary to make any
repair required to be made by it hereunder to remedy any condition that either
(i) results in a denial of access to the Premises, (ii) imminently threatens the
health or safety of any occupant of the Premises, or (iii) except in the case of
a fire or other casualty, materially interferes with Tenant's ability to conduct
its business in the Premises. In all other cases, at Tenant's written request,
Landlord shall employ contractors or labor at so-called overtime or other
premium pay rates and incur any other overtime costs or expenses in making any
repairs, alterations, additions or improvements, and Tenant shall pay to
Landlord, as additional rent, within thirty (30) days after demand, an amount
equal to the difference between the overtime or other premium pay rates and the
regular pay rates for such labor and any other overtime costs or expenses so
incurred.

          e)   Landlord shall not be liable by reason of any injury to or
interference with Tenant's business arising from the making of any repairs,
alterations, additions or improvements in or to the Premises or the Building or
to any appurtenances or equipment therein except as expressly provided otherwise
herein. Landlord reserves the right to stop any service or utility system, when
necessary by reason of accident or emergency, or until necessary repairs have
been completed, provided, however, that in each instance of stoppage, Landlord
shall exercise reasonable diligence to eliminate the cause thereof. Except in
case of emergency repairs, Landlord will give Tenant reasonable advance notice
of any contemplated stoppage and will use reasonable efforts to avoid
unnecessary inconvenience to Tenant by reason thereof. Notwithstanding the
foregoing, if any essential services, the supply of which is within Landlord's
reasonable control, are interrupted, and such interruption prevents Tenant from
obtaining access to or conducting normal business operations in any material
portion of the Premises, then, to the extent the interruption does not result
from the negligence or willful misconduct of Tenant, its employees, invitees or
agents, Tenant shall be entitled to a proportionate abatement of Base Rent and
Additional Rent. The abatement shall begin on the third (3rd) consecutive day of
the interruption or when Tenant stops using the Premises or the affected part
thereof because of the interruption, whichever is later. The abatement shall end
when Tenant's full use of and access to the Premises is restored. Tenant shall
have the option to cancel the Lease if the interruption unreasonably and
materially interferes with Tenant's use of or access to the Premises or material
portion thereof, for at least thirty (30) consecutive days.

9.   NO OTHER SERVICES BY LANDLORD:

          a)   Landlord shall not be required to render any services to Tenant
or to make any repairs or replacements to the Premise, except as provided in
Sections 3, 8, 11 and 12 hereto. Without limiting the generality of the
foregoing, it is specifically understood and agreed that Tenant

                                      -16-
<PAGE>

shall be solely responsible for all charges for the following or services used,
rendered or supplied to, upon or in connection with the Premises throughout the
Term: electric; gas or any other utilities; telephone and/or communication
services; security system or services; janitorial services; trash removal.

          b)   In the event that any utilities or services are supplied or
furnished by any governmental corporation or authority, Tenant shall pay all
bills accruing during the Term promptly when they become due and shall at all
times during the Term hereof keep the Premises free and clear from any lien that
may attach thereto by reason of the non-payment of said bills.

10.  INSURANCE:

          a)   Tenant shall maintain in effect throughout the Term, through
insurance carriers reasonably satisfactory to Landlord; (i) insurance against
claims for personal injury (including death) and property damage, under a policy
of general public liability insurance, in amounts not less than $3,000,000
combined single limit in respect of bodily injury (including death) and
$1,000,000 for property damage; and (ii) such other insurance as may reasonably
be required by the holder of a mortgage on the Building. The insurance policy
referred to in subsection (i) above shall be maintained on an occurrence basis
and name Landlord Indemnified Parties as an additional insured party. All
insurance policies shall be taken out with insurers rated A 7 or better (or if
such ratings are not in effect, the equivalent thereof) by Best Rating Service,
or any successor thereto (or if there be none, an organization having a National
reputation) who are licensed to do business in the Commonwealth of Pennsylvania
and shall be in form reasonably satisfactory from time to time to Landlord.

          b)   Prior to the commencement of the Term, Tenant shall provide
Landlord with certificates of the insurance policies herein required of Tenant.
All policies shall provide that coverage thereunder may not be reduced or
terminated without at least thirty days' prior written notice to Landlord.
Tenant shall furnish to Landlord throughout the Term replacement certificates at
least thirty (30) days prior to the expiration date of the then current policies
and, upon request of Landlord, shall supply to Landlord copies of all policies
herein required of Tenant.

          c)   Any policy or policies of fire, extended coverage or similar
casualty insurance, which either party obtains in connection with the Premises
(Phase One and/or Phase Two), Building or Property shall include a clause or
endorsement denying the insurer any rights of subrogation against the other
party (i.e. Landlord or Tenant) for all perils covered by said policy. Should
such waiver not be available then the policy for which the waiver is not
available must name the other party as an additional named insured affording it
the same coverage as that provided the party obtaining said coverage. Any
provision of this Lease to the contrary notwithstanding, Landlord and Tenant
hereby release the other from any and all liability or responsibility to the
other or anyone claiming through or under them by way of subrogation or
otherwise (a) from any and all liability for any loss or damage to the property
of the releasing party, (b) for any loss or damage that may result, directly or
indirectly, from the loss or damage to such property (including rental value and
business interruption), and (c) from legal liability for any loss or damage to
property (no matter who the owner of the property may be), all to the extent
that the releasing party's loss or damage is insured or, if not insured, was
required to be insured under the terms hereof, even if such loss or damage or
legal liability shall be caused by or result from the fault or negligence of the
other party or anyone

                                      -17-
<PAGE>

for whom such party may be responsible and even if the releasing party is self
insured in whole or in part. It is the intention of the parties that Landlord
and Tenant shall look solely to their respective insurance carriers for recovery
against any such property loss or damage or legal liability, without such
insurance carriers having any rights of subrogation against the other party.

          d)   Landlord covenants and agrees that throughout the Term it will
insure the Property, the Building and all improvements installed and or
constructed therein owned by Landlord (including, without limitation, the
improvements to be constructed by Landlord pursuant to the Base Building and
Site Work Plans) and all of Landlord's personalty thereon located, but excluding
all of Tenant's equipment, machinery, inventory, furniture and other personalty
on a "special form-all risk" basis, including, sprinkler leakage, vandalism,
nuisance, loss of rents, earthquake, flood, demolition, increased cost to
rebuild, environmental remediation and liability insurance and mischief, fire
and standard extended coverage perils, in an amount not less than the full
replacement cost thereof. The cost of the foregoing insurance shall be included
in Operating Expenses. Landlord, at Landlord's sole cost and expense shall
maintain public liability insurance (including a contractual liability insurance
endorsement) sufficient to cover Landlord's indemnification obligations arising
under Section 21 below and naming the Tenant Indemnified Parties against claims
for bodily injury, death or property damage with minimum limits of
$3,000,000.00, combined single limit per occurrence. Landlord shall furnish to
Tenant copies of such policies of insurance or certificates thereof, which shall
have attached thereto an endorsement that such policy shall not be materially
changed, reduced or cancelled without at least thirty (30) days prior notice to
the Tenant and that no act or omission of Landlord shall invalidate the interest
of the Tenant Indemnified Parties under such insurance. In addition, Landlord
shall maintain and keep in force and effect during the Term, rental income
insurance insuring Landlord against abatement or loss of Base Rent, and items of
Additional Rent, in case of fire or other casualty similarly insured against, in
an amount at least equal to the Base Rent and Additional Rent during, at the
minimum, one (1) Lease Year hereunder. Landlord may, but shall not be obligated
to, take out and carry any other forms of insurance as it or the mortgagee or
ground lessor (if any) of Landlord may require or reasonably determine to be
prudent, so long as same is consistent with that carried by other owners of
comparable office buildings in the vicinity of the Property.

11.  CASUALTY:

          a)   If the Premises are damaged by fire or other casualty, Tenant
shall promptly notify Landlord and Landlord shall repair the damaged portions of
the Premises, including, without limitation, the Base Building and Site Work and
the Tenant Work, but excluding Tenant's furniture, fixtures, equipment and other
property therein and any improvements or alterations made to the Premises by
Tenant after the Commencement Date (other than the completion of the Tenant
Work), provided that if, in Landlord's reasonable judgment, the damage would
require more than 270 days of work to repair, or if the insurance proceeds
(excluding rent insurance) which Landlord anticipates receiving (if such amount
is in excess of $500,000) must be applied to repay any mortgages encumbering the
Building, Landlord shall so notify Tenant in writing within 60 days following
the occurrence of the fire or other casualty, in which event, either Landlord or
Tenant may terminate this Lease by so notifying the other party, which notice
shall specify a termination date not less than 30 days after its transmission.
If Landlord is so required to repair, the work shall be commenced promptly and
completed with due diligence, taking into account the time required for Landlord
to procure said insurance proceeds, and construction delays due to shortages of
labor or material or

                                      -18-
<PAGE>

other causes beyond Landlord's reasonable control, provided, however, in the
event Landlord fails to complete such restoration within such 270 day period for
any reason (including those beyond Landlord's reasonable control), Tenant may
terminate this Lease upon fifteen (15) days prior written notice to Landlord
given before the restoration is substantially completed and provided Landlord
does not complete such restoration during such period.

          b)   During the period when Tenant shall be deprived of possession of
the Premises by reason of such damage, Tenant's obligation to pay Base Rent
under Section 5 and Operating Expenses under Section 6 shall abate in the
proportion which the damaged area of the Premises bears to the entire Premises
until such time as Landlord substantially competes the restoration of the
Premises as provided above and Tenant is legally permitted to use and occupy the
Premises.

12.  CONDEMNATION:

          a)   If all of the Premises is taken through the exercise of the power
of eminent domain, this Lease shall terminate on the date when possession of the
Premises is required by the condemning authority. If only part of the Premises
is taken, then (i) if the condemnation award is insufficient to restore the
remaining portion of the Premises or if such award must be applied to repay any
mortgages encumbering the Building, or (ii) if, in addition to a portion of the
Premises, a portion of the Building or Land is taken and Landlord deems it
commercially unreasonable to continue leasing all or a portion of the remaining
space in the Building, or (iii) if a substantial portion of the Premises is so
taken, and it is commercially impossible for Tenant to continue its business
within the Premises, then Landlord in the case of (i) and (ii) above and Tenant
in the case of (iii) above, shall have the right to terminate this Lease on the
date when the condemned portion of the Premises, Building or Land is required to
be delivered to the condemning authority, which right shall be exercisable by
the exercising party so notifying the other party no later than thirty (30) days
prior to such date. Notwithstanding anything to the contrary, if the taking of a
part of the Premises materially interferes with Tenant's ability to continue its
business operations, at Tenant's sole and reasonable determination, Tenant may
elect to terminate the Lease agreement in writing with no further obligations
under the Lease, on the date when the condemned portion of the Premises,
Building or Land is required to be delivered to the condemning authority or the
condemning authority takes possession of the Premises.

          b)   If this Lease is not so terminated after a partial condemnation,
then after the date when the condemned portion of the Premises is delivered to
the condemnor, the Base Rent shall be reduced in the proportion which the
condemned area bears to the entire area of the Premises, and Tenant's
Proportionate Share shall be reduced by the same proportion.

          c)   Tenant shall have the right to claim against the condemnor only
for removal and moving expenses and business dislocation damages which may be
separately payable to tenants in general under Pennsylvania law, provided such
payment does not reduce the award otherwise payable to Landlord. Subject to the
foregoing, Tenant hereby waives all claims against Landlord with respect to a
condemnation, and hereby assigns to Landlord all claims against the condemnor
including, without limitation, all claims for leasehold damages and diminution
in the value of Tenant's leasehold estate.

                                      -19-
<PAGE>

13. TENANT'S FIXTURES: Tenant shall have the right to install trade fixtures,
office machinery and computer equipment (excluding alterations, improvements and
additions which are governed by Section 14) required by Tenant or used by it in
its business, provided that same do not impair the structural strength of the
Building and further provided that such trade fixtures, office machinery and
equipment shall be limited to items normally used in an office building. Without
limiting the generality of the foregoing, it is specifically understood and
agreed that Tenant shall not have the right to install or operate any electrical
equipment or machinery in the Premises (other than normal office machinery and
equipment) without Landlord's prior written consent. Tenant shall remove all
such trade fixtures, office machinery and computer equipment prior to the end of
the Term, and Tenant shall repair and restore any damage to the Premises and
Building caused by such installation or removal.

14.  ALTERATIONS: Tenant shall not, without on each occasion first obtaining
Landlord's prior written consent, which shall not be unreasonably withheld,
conditioned or delayed, make any alterations, improvements or additions to the
Premises, except that Tenant may, without the consent of Landlord but with prior
written notice to Landlord (which notice shall include a scope of work), make
minor improvements to the interior of the Premises provided that: (i) they do
not impair the structural strength, operation or value of the Building, (ii)
they are not visible from outside of the Premises and (iii) Tenant shall, prior
to the commencement of the work, deliver to Landlord waivers of liens, in form
acceptable to Landlord, from all contractors, subcontractors and materialmen
performing such work, and shall take all steps required or permitted by law to
avoid the imposition of any mechanics' lien upon the Premises, Building or the
Land. All alterations, improvements and additions shall become part of the
Premises and the property of Landlord without payment therefor by Landlord and
shall be surrendered to Landlord at the end of the Term; provided, however, if
so notified by Landlord at the time such alteration, improvement or addition is
approved by Landlord, Tenant shall, prior to the end of the Term, remove any
such alterations and improvements made by Tenant after initial occupancy, or the
parts thereof specified by Landlord, from the Premises and shall repair all
damage caused by installation and removal. For purposes of this Section 14,
"minor improvements" shall be defined as those improvements costing no more than
$60,000.

15.  MECHANICS' LIENS: Tenant shall not, in the making of any repairs or
alterations pursuant to the provisions of Section 14 and/or performing Tenant's
Work under paragraph 3 hereof or otherwise, suffer or permit any mechanic's,
laborer's or materialman's lien to be filed against the Premises, Building, Land
or any part thereof by reason of labor or materials supplied or claimed to have
been supplied to Tenant; and if any such lien shall be filed, Tenant, within
thirty (30) days after notice of filing, shall cause it to be discharged of
record or bonded at Tenant's option, provided however, in the event Tenant has a
dispute with such mechanic, laborer or materialman, Tenant shall not be required
to discharge such lien of record or otherwise bond it if Tenant is able to
provide Landlord with adequate assurance of its ability to pay same in the event
such dispute is resolved in such lienor's favor and Landlord is not precluded
from refinancing or selling the Premises or the Land as a result thereof.

16.  USE OF PREMISES: Tenant may use and occupy the Premises only for the
express and limited purposes listed in Section 1 of this Lease, and the Premises
shall not be used or occupied, in whole or in part, for any other purpose
without the prior written consent of Landlord. Tenant shall not commit or suffer
any waste upon the Premises or Building. Landlord represents to Tenant that the
Premises may be used for the Permitted Uses specified in this Lease.

                                      -20-
<PAGE>

17.  RULES & REGULATIONS: Tenant covenants and agrees that Tenant, its
employees, agents, invitees, licensees and other visitors, shall observe
faithfully, and comply strictly with, such reasonable Rules and Regulations as
Landlord or Landlord's agents may, after notice to Tenant, from time to time
adopt with respect to the Building or the Second Building provided, however,
there are tenants other than Tenant in occupancy thereof. In the event Rules and
Regulations are adopted by Landlord they shall be enforced in a uniform and
indiscriminatory manner and shall not interfere with Tenant's use and occupancy
of the Premises for their intended purposes.

18.  GOVERNMENTAL REGULATIONS: Tenant shall, in the use and occupancy of the
Premises, comply with all applicable laws (including Environmental Laws),
ordinances, notices and regulations of all governmental and municipal
authorities, and with the regulations of the insurers of the Premises. Tenant
shall keep in force at all times all licenses, consents and permits necessary
for the lawful conduct of Tenant's business at the Premises. Nothing in the
foregoing shall require the Tenant to perform any work or make any improvements
or repairs which the Landlord is required to make pursuant to other provisions
of this Lease.

19.  SIGNS:  Tenant shall be permitted to place its name and logo on a monument
sign to be located on the Land in a location chosen by Tenant. Tenant shall be
responsible for all costs associated with the design, construction and
installation of such signage, provided that Tenant may utilize a portion of the
Tenant Work Allowance for this purpose. In addition, all such signage shall
comply with the Protective Covenants, all applicable laws, statutes and
ordinances and shall be subject to Landlord's prior written approval not to be
unreasonably withheld, conditioned or delayed and which, if not given or denied
within fifteen (15) days following its request shall be deemed granted. In the
event Landlord constructs the Second Building and Tenant does not elect the
Phase Two Option, Landlord shall be permitted at, its sole cost and expense, to
alter the monument sign (in a manner reasonably acceptable to Tenant which may
include Tenant's requirement that its name/logo be given the prominent location
on such sign) to place up to four (4) additional names thereon to identify the
tenants of the Second Building so long as Landlord is not permitted to install a
second monument sign for the Second Building pursuant to applicable laws,
statutes and ordinances.

20.  LANDLORD'S ENTRY: Landlord and its agents, contractors and invitees shall
have the right to enter the Premises at all reasonable times with reasonable
notice to inspect the same, to make any necessary repairs thereto, to exhibit
same to prospective purchasers, and mortgagees, and during the last nine (9)
months of the Term, provided Tenant has not elected to renew or extend the Term
of the Lease, to prospective tenants. Notwithstanding anything to the contrary
in Section 20, entry is conditioned upon Landlord: (1) giving Tenant at least
twenty-four (24) hours advance notice, except in emergency; (2) promptly
finishing any work for which it entered; (3) causing the least practical
interference to Tenant's business and (4) except in the event of an emergency,
complying with any of Tenant's reasonable security measures.

21.  INDEMNIFICATION:

          a)   Tenant Indemnity.  Tenant shall defend, indemnify, save and hold
               ----------------
harmless ("Indemnify") Landlord, and its respective agents, employees, officers,
           ---------
directors, shareholders, and partners ("Landlord Indemnified Parties") from and
against all liabilities, obligations, damages, penalties, claims, causes of
action, costs, charges and expenses, including reasonable attorneys'

                                      -21-
<PAGE>

fees, court costs, administrative costs, and costs of appeals which may be
imposed upon or incurred by or asserted by reason of any of the following which
shall occur before or during the Term of this Lease:

                 (i)    any work or act done in, on or about the Premises or any
part thereof at the direction of or caused by Tenant, its agents, contractors,
subcontractors, servants, employees, licensees or invitees, unless such work or
act is done or performed by Landlord or its agents or employees;

                 (ii)   any negligence or other wrongful act or omission on the
part of Tenant or any of its agents, contractors, subcontractors, servants,
employees, subtenants, licensees or invitees;

                 (iii)  any accident, injury or damage to any persons or
property occurring in, on or about Property or any part thereof at any time
prior to such time as construction of the Second Building is commenced and
Tenant has not elected the Phase Two Option, unless caused by the gross
negligence of Landlord, its employees or agents;

                 (iv)   any accident, injury or damage to any persons or
property occurring in, on or about the Premises or any part thereof, unless
caused by the gross negligence of Landlord, its employees or agents;

                 (v)    any failure on the part of Tenant to perform or comply
with any of the covenants, agreements, terms, provisions, conditions or
limitations contained in this Lease on its part to be performed or complied
with; and

                 (vi)   any failure of the Property to comply with Environmental
Laws as a result of the acts or omissions of Tenant or Tenant's employees,
agents, or contractors.

          b)  The obligation of Tenant to Indemnify contained in this Section
21(a) shall not be limited by any limitation on the amount or type of damages,
compensation or benefits payable by or for Tenant, its agents or contractors
under workers' or workman's compensation acts, disability benefit acts or other
employee benefits acts, or under any other insurance coverage Tenant may obtain.

          c)  Landlord Indemnity. Landlord shall defend, indemnify, save and
              ------------------
hold harmless ("Indemnify") Tenant and its agents, employees, officers,
                ---------
directors, shareholders, and partners (the "Tenant Indemnified Parties") from
and against all liabilities, obligations, damages, penalties, claims, causes of
action, costs, charges and expenses, including reasonable attorneys' fees, court
costs, administrative costs, and costs of appeals which may be imposed upon or
incurred by or asserted by reason of any of the following which shall occur
before or during the Term of this Lease:

                 (i)    any negligence or other wrongful act or omission on the
part of Landlord or any of its respective agents, contractors, subcontractors,
servants, employees, subtenants, licensees or invitees;

                                      -22-
<PAGE>

                 (ii)   any accident, injury or damage to any persons or
property occurring in, on or about the Property or any part thereof (other than
the Premises which shall be governed in accordance with Section 21(a)(iv) above)
which occurs at any time after Tenant has determined not to exercise (or is
deemed not to have exercised) the Phase Two Option, unless caused by the gross
negligence of Tenant, its employees or agents;

                 (iii)  any failure on the part of Landlord to perform or comply
with any of the covenants, agreements, terms, provisions, conditions or
limitations contained in this Lease on its part to be performed or complied
with; and

                 (iv)   any failure of the Property to comply with Environmental
Laws, other than as a result of the acts or omissions of Tenant or Tenant's
employees, agents, or contractors.

          d)  The obligation of Landlord to Indemnify contained in this Section
21(c) shall not be limited by any limitation on the amount or type of damages,
compensation or benefits payable by or for Landlord or its respective agents or
contractors under workers' or workman's compensation acts, disability benefit
acts or other employee benefits acts, or under any other insurance coverage
Landlord may obtain.

22. CURING DEFAULTS:

          a)  If Tenant shall default in performing any of its obligations
hereunder, Landlord may (but shall not be so obliged), in addition to Landlord's
other rights and remedies and without waiver of such default, cure such default
on behalf of Tenant provided that Landlord shall have first given Tenant notice
of such default and Tenant shall have failed within ten (10) days following said
notice to cure or diligently to pursue the cure of said default (which notice
and opportunity to cure shall not be required in case of emergency). Tenant,
upon demand of Landlord, shall reimburse Landlord for all costs (including
reasonable counsel fees) incurred by Landlord together with interest at the rate
of ten percent (10%) per annum, with respect to such default, and, if Landlord
so elects, Landlord's efforts to cure the same, which costs shall be deemed
Additional Rent hereunder.

          b)  In the event that Landlord fails to maintain or repair those
portions of the Premises for which Landlord is responsible or otherwise defaults
under this Lease, Tenant shall provide written notice to Landlord detailing such
failures. Landlord shall have thirty (30) days after receipt of such notice
within which to cure such default (except when the cure requires more than
thirty (30) days for performance and Landlord commences the cure within thirty
(30) days and diligently pursues the cure to completion within sixty (60) days).
If Landlord shall so be in default under this Lease after providing the
aforesaid notice, then Tenant may perform the same for the account of Landlord.
If Tenant makes expenditures or incurs costs, on Landlord's account (including
reasonable attorneys' fees and costs in instituting, prosecuting and/or
defending any action or proceeding through appeal) Landlord shall repay Tenant
the sums or obligations incurred, together with interest at the rate of ten
percent (10%) per annum, within fifteen (15) days following Tenant's invoice
therefore. If such sums are not timely paid to Tenant, such sums may be offset
against the next installments of Rent due hereunder, until the balance is
reduced to zero. Notwithstanding any other provision of this Lease, Landlord
shall not have any personal liability under this Lease. In the event of any
default by Landlord under this Lease, Tenant agrees to look solely to the equity
or interest then owned by Landlord in the Premises together with the profits and

                                      -23-
<PAGE>

proceeds therefrom, and in no event shall any deficiency judgment or personal
money judgment of any kind be sought or obtained against Landlord.

23. DEFAULT:

          a)  If (i) Tenant fails to pay any installment of Base Rent or
Additional Rent for a period of ten (10) days after written notice from
Landlord, (ii) Tenant fails to observe or perform any of Tenant's other
obligations herein contained and such failure continues for more than thirty
(30) days after written notice from Landlord (except when the cure requires more
than thirty (30) days for performance and Tenant commences the cure within
thirty (30) days and diligently pursues the cure to completion within sixty (60)
days), (iii) Tenant files a petition or commences any proceeding under any
bankruptcy or insolvency law, (iv) a petition is filed or any proceeding is
commenced against Tenant under any bankruptcy or insolvency law and is not
dismissed within sixty (60) days, (v) a receiver or other official is appointed
for Tenant or for a substantial part of Tenant's assets or for Tenant's
interests in this Lease, or (vi) any attachment or execution is filed or levied
against a substantial part of Tenant's assets or Tenant's interests in this
Lease, then in any such event, an event of default (each, an "Event of Default")
shall be deemed to exist and Tenant shall be in default hereunder. Upon an Event
of Default, at the option of Landlord: (w) all then due and unpaid Base Rent and
Additional Rent shall be due and payable immediately and the balance of the Base
Rent and all Additional Rent for the unexpired portion of the Term of this Lease
and all other sums to which Landlord is entitled hereunder shall be deemed to be
due payable and in arrears, as if payable in advance hereunder (discounted to
present value at the time of payment at an annual rate of ten percent (10%))
(collectively, the "Acceleration Amount"); (x) this Lease and the Term shall,
without waiver of Landlord's other rights and remedies, terminate without any
right of Tenant to save the forfeiture; (y) Landlord may terminate and rescind
the Phase Two Option upon written notice to Tenant (provided Tenant has not
already elected the Phase Two Option) or (z) without termination of this Lease,
repossess the Premises and terminate the Phase Two Option with or without legal
process, breaking locks and replacing locks, and removing Tenant's and any third
party's property therefrom, and making any disposition thereof as Landlord may
deem commercially reasonable. Upon such termination and/or repossession Landlord
may make such alterations and repairs as may be necessary in order to relet the
Premises and may relet the Premises or any part or parts thereof, either in
Landlord's name or otherwise, for a term or terms which may, at Landlord's
option, be less than or exceed the period which would otherwise have constituted
the balance of the Term and at such rent or rents and upon such other terms and
conditions as in Landlord's commercially reasonable discretion may seem
advisable and to such person or persons as may in Landlord's commercially
reasonable discretion seem best; upon each such reletting all rents received by
Landlord from such reletting shall be applied as follows: first, to the payment
of any costs and expenses of such reletting, including, but not limited to fit
up expenses, reasonable attorneys fees, brokerage commissions and marketing
expenses; second, to the payment of any indebtedness other than Base Rent,
Additional Rent or other charges due hereunder from Tenant to Landlord; third,
to the payment of Base Rent, Additional Rent and other charges due and unpaid
hereunder; and the residue, if any, shall be held by Landlord and applied in
payment of future rent as it may become due and payable hereunder. If rentals
received from reletting during any month are less than that to be paid during
that month by Tenant, Tenant shall pay any such deficiency to Landlord. Such
deficiency shall be calculated and paid monthly. Any acceleration of the rent by
Landlord shall not constitute a waiver of any right or remedy of Landlord, and
if Tenant shall fail to pay the Acceleration Amount upon Landlord's demand, then
Landlord may thereafter terminate this

                                      -24-
<PAGE>

Lease, as aforesaid. Immediately upon such termination by Landlord, Landlord
shall have the right to recover possession of the Premises as aforesaid.
Notwithstanding the foregoing, in the event the Event of Default under this
Lease is one arising pursuant to Subsection 23(a)(ii) above, the Landlord shall
have no right to accelerate Base Rent or Additional Rent or otherwise collect or
seek to collect any future rentals for the Premises for the unexpired balance of
the Term. Furthermore, Landlord shall not be entitled to seek to evict Tenant
from the Premises (or otherwise repossess the Premises) while exercising its
rights to recover the full Acceleration Amount (i.e. the Acceleration Amount
without any reduction for the fair and reasonable rental value of the Premises
for the unexpired balance of the Term) so long as (A) no other Event of Default
exists pursuant to this Section 23 other than an Event of Default pursuant to
Subsection 23(a)(i) and (B) after Landlord notifies Tenant that all Rent has
been accelerated as provided herein, no additional Event of Default of any kind
(including one arising pursuant to Subsection 23(a)(i)) occurs.

          b)  In addition to the foregoing, upon an Event of Default and after
an additional fifteen (15) day written notice from Landlord to Tenant of its
intention to exercise its remedy as set forth in this Section 23(b) and an
opportunity to cure such Event of Default, Tenant hereby authorizes and empowers
the Tenant hereby authorizes and empowers the Prothonotary or any attorney of
any court of record in the Commonwealth of Pennsylvania or elsewhere as attorney
for Tenant and all persons claiming under or through Tenant, to appear for and
confess judgment against Tenant for possession of the Premises, and against all
persons claiming under or through Tenant, in favor of Landlord, for recovery by
Landlord of possession thereof, for which this Agreement or a copy hereof
verified by affidavit, shall be a sufficient warrant, and thereupon a writ of
possession may immediately issue for possession of the Premises, without any
prior writ or proceeding whatsoever and without any stay of execution if for any
reason after such action has been commenced the same shall be terminated and the
possession of the Premises remains in or is restored to Tenant, Landlord shall
have the right upon the occurrence of any subsequent event of default to confess
judgment in one or more further actions in the manner and form set forth above
to recover possession of said Premises for such subsequent default. Tenant
waives all errors in connection with any such confession of judgment. No such
termination of this Lease, nor taking, nor recovering possession of the Premises
shall deprive Landlord of any remedies or action against Tenant for fixed basic
rent, additional rent or for other sums due hereunder or for damages due or to
become due for the breach of any condition or covenant herein contained, nor
shall the bringing of any such action for rent and/or other sums due hereunder,
or breach of covenant or condition nor the resort to any other remedy herein
provided for the recovery of rent and/or other sums due hereunder or damages for
such breach be construed as a waiver of the right to insist upon the forfeiture
and to obtain possession in the manner herein provided.

          c)  No act or forbearance by Landlord shall be deemed a waiver or
election of any right or remedy by Landlord with respect to Tenant's obligations
hereunder, unless and to the extent that Landlord shall execute and deliver to
Tenant a written instrument to such effect, and any such written waiver by
Landlord shall not constitute a waiver or relinquishment for the future of any
obligation of Tenant. Landlord's acceptance of any payment from Tenant
(regardless of any endorsement on any check or any writing accompanying such
payment) may be applied by Landlord to Tenant's obligations then due hereunder
any priority as Landlord may elect, and such acceptance by Landlord shall not
operate as an accord and satisfaction or constitute a waiver of any right or
remedy of Landlord with regard to Tenant's obligations hereunder.

                                      -25-
<PAGE>

          d)  Notwithstanding anything herein to the contrary, Landlord shall
use all good faith efforts to mitigate its damages arising as a result of an
Event of Default by reletting the Premises at the highest possible rental, and
if Landlord is successful in reletting the Premises, Tenant shall be entitled to
a credit or refund, as applicable, in the amount of the rents collected by
Landlord under such reletting during the period that this Lease would have been
in effect had such Event of Default not occurred. If Landlord relets for a
period of time longer than the current Term of the Lease, then any special
concessions given to the new tenant shall be allocated throughout the entire
reletting term to not unduly reduce the amount of consideration received by
Landlord during the remaining period of Tenant's Term. Landlord's duty to
mitigate damages shall be deemed satisfied if Landlord lists the Premises for
lease with a reputable commercial real estate broker who reasonably markets the
Premises and Landlord subsequently deals with any tenant prospects, in a
commercially reasonable manner, but Landlord shall not be obligated to relet the
Premises prior to leasing other premises within the Building or any other space
then owned or controlled by Landlord which is then available for lease.

24. QUIET ENJOYMENT: So long as an Event of Default under the covenants and
agreements of this Lease has not occurred, Tenant's quiet and peaceful enjoyment
of the Premises shall not be disturbed or interfered with by Landlord or by any
person claiming by, through or under Landlord.

25. ASSIGNMENT AND SUBLETTING:

          a)  Tenant shall not assign, pledge, mortgage or otherwise transfer or
encumber this Lease, nor sublet all or any part of the Premises or permit the
same to be occupied or used by anyone other than Tenant or its employees,
agents, representatives and business invitees without Landlord's prior written
approval, which Landlord agrees not unreasonably to withhold, condition or
delay. It will not be unreasonable for Landlord to withhold consent if the
reputation, financial responsibility, or business of a proposed assignee or
subtenant is unsatisfactory to Landlord. Within fifteen (15) days following the
date of such request, Landlord shall either grant or refuse consent to the
requested assignment or subletting in writing. If Landlord fails to timely
respond to Tenant's request, such failure shall be deemed Landlord's grant of
consent to the proposed transfer.

          b)  Tenant's request for approval of an assignment or subletting shall
be in writing and contain the name, address, and description of the business of
the proposed assignee or subtenant, its most recent financial statements and
other evidence of financial responsibility, its intended use of the Premises,
and the terms and conditions of the proposed assignment or subletting.

          c)  Each assignee of Tenant's interest hereunder shall assume and be
deemed to have assumed this Lease and shall be and remain liable jointly and
severally with Tenant for all payments and for the due performance of all terms,
covenants, conditions and provisions herein contained on Tenant's part to be
observed and performed. No assignment shall be binding upon Landlord unless the
assignee shall deliver to Landlord an instrument containing a covenant of
assumption by the assignee, but the failure or refusal of an assignee to execute
the same shall not release assignee from its liability as set forth herein. Each
subtenant of a portion of the Premises shall agree to be bound by the term of
this Lease and shall be and remain liable jointly and severally with Tenant for
all payments and for the due performance of all terms, covenants, conditions and
provisions herein contained on Tenant's part to be observed and performed with
respect to the portion of the Premises being sublet.

                                      -26-
<PAGE>

          d)  Any consent by Landlord hereunder shall not constitute a waiver of
strict future compliance by Tenant of the provisions of this Section 25 or a
release of Tenant from the full performance by Tenant of any of the terms,
covenants, provisions, or conditions in this Lease contained. No assignment or
sublease with or without Landlord's consent shall relieve Tenant of its
obligations hereunder.

          e)  Notwithstanding anything to the contrary contained in this Lease,
Tenant may, upon ten (10) days written notice to Landlord but without Landlord's
prior written consent, and without Landlord having any right to terminate this
Lease or share in any consideration or profit therefor, assign or transfer its
entire interest in this Lease and the leasehold estate hereby created, or
sublease the entire demised premises or any portion thereof, to a successor
corporation (each a "Successor Corporation") of Tenant, which for the purposes
of this Lease shall mean either (a) any corporation or other business entity
which controls, is controlled by, or under common control with, Tenant, or (b) a
corporation or other business entity into which or with which Tenant, its
corporate successors or assigns, is merged or consolidated, in accordance with
applicable statutory provisions for the merger or consolidation of corporations,
provided that by operation of law or by effective provisions contained in the
instruments of merger or consolidation the liabilities of the corporations or
other business entities participating in such merger or consolidation the
liabilities of the corporations or other business entities participating in such
merger or consolidation are assumed by the corporation or other business entity
surviving such merger or consolidation, or (c) a corporation or other business
entity acquiring substantially all of Tenant's assets located in the Premises,
or (d) any successor to a Successor Corporation becoming such by any of the
methods described in subdivisions (a), (b) and (c ) above; provided, however,
that Tenant shall have no such right to assign or transfer to a Successor
Corporation unless Tenant shall not be in default in the performance of any of
its obligations under this Lease beyond the applicable notice and cure period
and with respect to subdivision (c ) above, as of the date of such transfer, the
purchaser has the reasonable financial ability to perform its obligations with
respect to this Lease and/or the Premises. For the purposes hereof "control"
shall be deemed to mean ownership of not less than fifty percent (50%) of all of
the voting stock of such corporation, or not less than fifty percent (50%) of
all of the legal and equitable interest in any other business entity, or the
possession of the power, directly or indirectly, to direct or cause the
direction of management and policy of a corporation or other business entity,
whether through the ownership of voting securities, common directors or
officers, the contractual right to manage the business affairs of such business
entity, or otherwise. Notwithstanding anything to the contrary contained in this
Lease (x) any sale or transfer of Tenant's capital stock, or redemption or
issuance of additional stock of any class, shall not be deemed an assignment,
subletting or any other transfer of this Lease or the Premises requiring either
notice to or approval by Landlord and (y) any Successor Corporation may use the
Premises for any lawful use at the time of such assignment.

          f)  Notwithstanding anything to the contrary contained in this Lease,
Tenant may, upon ten (10) days written notice to Landlord but without Landlord's
prior written consent, and without Landlord having any right to terminate this
Lease or share in any consideration or profit therefor, sublease up to fifty
percent (50%) of the Premises to one or more entities which may or may not be
Successor Corporations.

          g)  Notwithstanding anything to the contrary, in the event of any
assignment the Tenant and the assignee shall be jointly and severally liable for
all the obligations of Tenant

                                      -27-
<PAGE>

hereunder and no such assignment shall be effective until the Tenant and such
assignee or sublessee agree in writing to be so bound.

26. SUBORDINATION: This Lease and Tenant's rights hereunder shall be subject and
subordinate at all times in lien and priority to any first mortgage or other
primary encumbrance now or hereafter placed upon or affecting the Property or
the Premises, and to any second or otherwise subordinate mortgage or encumbrance
with the consent of the first mortgagee, and to all renewals, modifications,
consolidations and extensions thereof, without the necessity of any further
instrument or act on the part of Tenant, provided, however, that the holder of
any such mortgage or other encumbrance existing as of the Commencement Date
agrees not to disturb the use and occupancy of the Premises in accordance with
the terms of this Lease upon any foreclosure provided, however, Tenant agrees to
attorn to such holder of the mortgage or other encumbrance. Tenant shall execute
and deliver upon demand any further instrument or instruments confirming the
subordination of this Lease to the lien of any such first mortgage or to the
lien of any other mortgage, if requested to do so by Landlord with the consent
of the first mortgagee, and any further instrument or instruments of attornment
that may be desired by any such mortgagee or Landlord, provided, however, that
any holder of such lien or mortgage agrees not to disturb the use and occupancy
of the Premises in accordance with the terms of this Lease upon any foreclosure
and executes and delivers to Tenant a nondisturbance agreement in commercially
reasonable form. Each party shall bear their own costs in connection with the
review, negotiation and execution of the agreements to be delivered in
accordance with this Section. Notwithstanding the foregoing, any mortgagee may
at any time subordinate its mortgage to this Lease, without Tenant's consent, by
giving notice in writing to Tenant and thereupon this Lease shall be deemed
prior to such mortgage without regard to their respective dates of execution and
delivery. In that event such mortgagee shall have the same rights with respect
to this Lease as though this Lease had been executed prior to the execution and
delivery of the mortgage and had been assigned to such mortgagee. Landlord
agrees that it shall obtain and deliver to Tenant on or before the Commencement
Date of this Lease, or if earlier, on or before the date the Landlord obtains
its construction financing for the construction of the Building, a
subordination, non-disturbance and attornment agreement from the holder(s) of
any mortgage or other security interest now affecting the Premises, the Building
or the Property which shall be in such holder's commercially reasonable standard
form.

27. ESTOPPEL CERTIFICATES:

          a)  Tenant shall from time to time, within ten (10) business days
after Landlord's request, execute and deliver to Landlord a recordable written
instrument(s) certifying that this Lease is unmodified and in full effect (or if
there have been modifications, that it is in effect as modified), and the dates
to which rental charges have been prepaid by Tenant, if any, and whether or not,
to Tenant's knowledge, Landlord is in default of any of its obligations
hereunder. Tenant agrees that such statement may be relied upon by any
mortgagee, purchaser or assignee of Landlord's interest in this Lease, the
Building or Land.

          b)  Landlord shall from time to time, within ten (10) business days
after Tenant's request, execute and deliver to Tenant a recordable written
instrument(s) certifying that this Lease is unmodified and in full effect (or if
there have been modifications, that it is in effect as modified), and the dates
to which rental charges have been received from Tenant, if any, and whether or
not, to

                                      -28-
<PAGE>

Landlord's knowledge, Tenant is in default of any of its obligations hereunder.
Landlord agrees that such statement may be relied upon by any mortgagee,
purchaser, assignee, or subtenant of Tenant and Tenant's interest in this Lease
or the Premises.

          c)  Each party shall bear their own costs in connection with the
review, negotiation and execution of the documents to be delivered in accordance
with this Section unless a party is requested to deliver such documents more
than two (2) times per Lease Year in which event the requesting party shall pay
the other party's reasonable attorney's fees incurred in connection with same.

28. SURRENDER: By entry and possession of the Premises, Tenant thereby
acknowledges that Tenant has examined the Premises and accepts the same as being
in the condition called for by this Lease. Tenant, shall, at the end of the
Term, promptly surrender the Premises in good order and condition called for by
this Lease. Tenant, shall, at the end of the Term, promptly surrender the
Premises in good order and condition and in conformity with the applicable
provisions of this Lease, excepting only normal wear and tear, damage by fire or
other casualty and condemnation.

29. HOLDING OVER: This Lease shall expire absolutely and without notice on the
Expiration Date, provided that if Tenant, with the prior written consent of
Landlord, retains possession of the Premises or any part thereof after the
termination of this Lease by expiration of the Term or otherwise, a month-to-
month tenancy shall be deemed to exist, and Tenant shall continue to pay the
Base Rent and Additional Rent due hereunder. If such holding over exists without
Landlord's prior written consent, Tenant shall pay Landlord, as Landlord's
exclusive compensation and remedy for Tenant's retention of possession, an
amount calculated on a per diem basis for each day of such continued retention,
equal to 150% of the Base Rent and Additional Rent for the time Tenant thus
remains in possession.

30. NOTICES: All notices, requests and consents herein required or permitted
from either party or the other shall be in writing and shall be deemed given on
receipt by either party via the United States Postal Service, registered or
certified mail, return receipt requested, postage prepaid, addressed to Landlord
at its address aforesaid, with a copy to any mortgagee designated by Landlord,
or, as the case may be, addressed Tenant at its address aforesaid and Tenant's
Counsel at its address aforesaid, or to such other address as the party to
receive same may designate by notice to the other, from time to time.

31. BROKER: Each of the parties represents and warrants that there are no claims
for brokerage commissions or finder's fees in connection with the execution of
this Lease, and each party agrees to indemnify the other against, and hold it
harmless from, all liability arising from any such claim including, without
limitation, the cost of counsel fees in connection therewith.

32. DEFINITION OF PARTIES: The word "Landlord" is used herein to include the
Landlord named above and any subsequent person who succeeds to the rights of
Landlord herein, each of whom shall have the same rights and remedies as he
would have had he originally signed this Lease as Landlord, but neither Landlord
nor any such person shall have any liability hereunder after he ceases to hold a
free or leasehold interest in the premises, except for obligations which may
have theretofore accrued; and in all events, Tenant shall look solely to the
Premises and rents and profits and proceeds derived therefrom for enforcement of
any obligation hereunder or by law assumed or

                                      -29-
<PAGE>

enforceable against Landlord or such other person. The word "Tenant" is used
herein to include the party named above as Tenant as well as its or their
respective heirs, personal representatives, successors and assigns, each of whom
shall be under the same obligations, liabilities and disabilities and have only
such rights, privileges and powers as he would have possessed had it or they
originally signed this Lease as Tenant.

33. TENANT'S RENEWAL OPTION: Tenant is hereby granted two (2) options to extend
the Term of this Lease for two (2) consecutive additional periods of five years
each (the "First Renewal Term" and the "Second Renewal Term" each a "Renewal
Term" and, if exercised by Tenant, included in the "Term" of this Lease). Tenant
shall exercise the aforesaid options to extend the Term for the First Renewal
Term or the Second Renewal Term, in each instance, by giving Landlord written
notice at least nine (9) months prior to the Expiration Date, or the last day of
the First Renewal Term, as applicable. The First Renewal Term shall begin on the
day immediately following the Expiration Date, and the Second Renewal Term shall
begin on the day immediately following the last day of the First Renewal Term.
Each Renewal Term shall be on the same terms and conditions as specified for the
initial Term of this Lease, except that (i) the Base Rent during each Renewal
Term shall continue to increase at the rate of 2% each Lease Year during each
Renewal Term and (ii) Landlord shall have no obligation to improve or otherwise
perform any work in the Premises. In the event that Tenant shall fail to timely
exercise its option with regard to the Renewal Terms, Tenant's rights hereunder
with regard to both the Renewal Terms shall immediately and irrevocably
terminate.

34. SUBMISSION OF LEASE TO TENANT: The submission by Landlord to Tenant of this
Lease shall have no binding force or effect, shall not constitute an option for
the leasing of the Premises, shall not constitute a lease or agreement to enter
in to a lease (even if such term is less than three (3) years in duration), nor
confer any rights or impose any obligations upon either party until the
execution thereof by Landlord and the delivery of an executed original copy
thereof by Landlord to Tenant or Tenant's representative.

35. LANDLORD'S WAIVER. Upon Tenant's written request, Landlord agrees to execute
waivers of Landlord's liens in conjunction with the financing of Tenant's
fixtures, machinery, inventory and/or equipment in a commercially reasonable
form reasonably satisfactory to Landlord, Tenant and Tenant's lender(s). Tenant
shall have the right at all times to remove and/or replace any fixtures,
machinery and/or equipment owned by Tenant.

36. LANDLORD'S WARRANTIES AND COVENANTS.

Landlord hereby covenants and warrants that:

          a)  Landlord is the fee simple owner of the Land and has good and
marketable title thereto.

          b)  The Land and the Building is subject to no prior lease, ground
lease, or any covenant, declaration, easement, or other document or encumbrance
which would interfere with Tenant's use and occupancy of the Premises for the
conduct of Tenant's business. Tenant shall have vehicular (including tractor
trailer trucks) access, to the Premises from Eagleview Boulevard.

                                      -30-
<PAGE>

          c)  The use of the Premises for the purpose specified herein is
permitted under applicable zoning ordinances and all conditions and restrictions
of record affecting the Property. On the Commencement Date, the Property shall
comply with all Laws.

          d)  Landlord represents and warrants to Tenant that to the best of
Landlord's knowledge, Tenant's use of the Premises for the Permitted Use will
not in and of itself violate Landlord's insurance policies which shall be in
effect immediately prior to the beginning of the Term nor increase the premiums
therefor.

          e)  Landlord agrees that throughout the Term, Landlord shall comply
and take all required measures in order to maintain compliance with, all laws,
ordinances and regulations of all public authorities and insurance rating
bureaus having jurisdiction thereof;

          f)  To the best of Landlord's knowledge, there are no Hazardous
Substances (as defined in Section 1) in, under or about the Property or the
Land. Landlord has fully completed all the recommendations set forth in the
Phase I Environmental Assessment for the Ruark Properties prepared for JRL
Properties, Inc. and LTK Associates, L.P. by Allied Environmental Management,
Inc. dated April 2000.

          g)  Landlord is duly organized, validly existing, legal entity, in
good standing and qualified to do business in Pennsylvania, with no proceedings
pending or contemplated for its dissolution or reorganization, voluntarily or
involuntary.

          h)  Landlord had the full right, power and authority to execute,
deliver and perform this Lease and the person executing this Lease on behalf of
Landlord is authorized to do so.

37. WAIVERS OF JURY TRIAL AND CERTAIN DAMAGES: Landlord and Tenant each hereby
expressly, irrevocably, fully and forever releases, waives and relinquishes any
and all right to trial by jury and any and all right to receive punitive,
exemplary and consequential damages from the other (or any past, present or
future board member, trustee, director, officer, employee, agent,
representative, or advisor of the other) in any claim, demand, action, suit,
proceeding or cause of action in which Landlord and Tenant are parties, which in
any way (directly or indirectly) arises out of, results from or relates to any
of the following, in each case whether now existing or hereafter arising and
whether based on contract or tort or any other legal basis: this Lease; any
past, present or future act, omission, conduct or activity with respect to this
Lease; any transaction, event or occurrence contemplated by this Lease; the
performance of any obligation or the exercise of any right under this Lease; or
the enforcement of this Lease. Landlord and Tenant reserve the right to recover
actual or compensatory damages, with interest, attorneys' fees, costs and
expenses as provided in this Lease, for any breach of this Lease.

38. EXPANSION OPTION:

          a)  Landlord hereby grants during the term hereof to Tenant the right
and option (the "Phase Two Option") to request that Landlord construct a second
two story 32,182 square foot building together with a connector between the
Building and the Second Building containing 4,604 square feet (collectively, the
"Second Building") and related site improvements (collectively, the "Expansion
Improvements") on the Land as shown on the Expansion Improvements Plan attached

                                      -31-
<PAGE>

hereto as Exhibit F, subject to and in accordance with the terms hereof.
Landlord, at Landlord's sole cost and expense shall construct the base building
and site work improvements related to the Expansion Improvements in the same
manner as set forth in Section 3 of the Lease.

          b)  The Phase Two Option shall be exercised by Tenant, if at all, by
written notice (the "Phase Two Option Exercise Notice") delivered to Landlord at
any time after the Commencement Date. The Phase Two Option may only be exercised
by the named Tenant hereunder or a Successor Corporation. In order to reserve
the Phase Two Option, Tenant shall pay the sum of Three Thousand Dollars
($3,000.00) (the "Reservation Fee") per month which shall be paid on the first
day of each month during the Term until such time as Tenant has elected the
Phase Two Option and Landlord has commenced construction of the base building of
the Second Building or until Tenant has determined that it does not desire to
exercise the Phase Two Option. In the event Tenant fails to pay the Reservation
Fee on or before the fifteenth (15th) of any calendar month during the Term and
within five (5) days following written notice from Landlord to Tenant of such
failure (provided Landlord shall only be obligated to give and Tenant to receive
two (2) such written notices every Lease Year), and Tenant has not theretofore
elected to exercise the Phase Two Option, such failure shall not constitute a
default under the Lease, but shall terminate Tenant's rights to exercise such
Phase Two Option.

          c)  The Base Rent for Phase Two (the "Expansion Base Rent") shall be
at the then current rate for Phase One (for Office Space and Shell Space, as
applicable) and the term of the Lease for Phase Two shall be coterminous with
the Term of this Lease with respect to Phase One, provided, however if the term
as so determined is less than ten (10) years, then the term for Phase One shall
be extended to ten (10) years, as if Tenant exercised a right to so extend the
term of Phase One in accordance with the terms of this Lease, including the
increase of Base Rent for Phase One as provided above (independent from any
Renewal Term set forth above) and the term of this Lease for both Phase One and
Phase Two shall be ten (10) years from the Expansion Rent Commencement Date.
Tenant shall be obligated to lease the entire Second Building if it elects the
Phase Two Option, provided, however, Tenant shall be permitted to designate up
to 7,200 square feet of space within the Second Building to be Shell Space
subject to conversion to Office Space in the same manner as provided above in
connection with Phase One. Landlord shall provide to Tenant an allowance in
accordance with the following schedule for Tenant to utilize in connection with
tenant improvements to the Phase Two ("Tenant's Expansion Work") in the same
manner as set forth in Section 3 of the Lease:

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------
   Year of Term of Phase Two Exercise Notice       Allowance per rentable square foot of Phase Two
   -----------------------------------------       -----------------------------------------------
---------------------------------------------------------------------------------------------------
<S>                                                <C>
                      1-5                                               $25.00
---------------------------------------------------------------------------------------------------
                     6-10                                               $26.00
---------------------------------------------------------------------------------------------------
                    11-15                                               $27.00
---------------------------------------------------------------------------------------------------
</TABLE>

Tenant's obligation to commence the payment of Expansion Base Rent shall
commence upon the

                                      -32-
<PAGE>

date (the "Expansion Rent Commencement Date") of Substantial Completion of
Tenant's Expansion Work, being the date which the Tenant's Expansion Work is
substantially completed but for minor items of finishing and adjustment and
Tenant is legally permitted to use and occupy Phase Two, but not later than the
earlier of (i) one hundred (100) days following the date on which Landlord
completes the Base Building and Site Work Improvements to the Second Building,
subject to Force Majeure Delay up to a maximum of thirty three (33) days, or
(ii) the date Tenant commences its regular business operations in the Second
Building. All improvements to the Expansion Improvements shall be undertaken in
the same manner as the improvements for the original Premises. From and after
the Expansion Rent Commencement Date, the Expansion Base Rent shall be included
in the Base Rent payable by Tenant under the terms of this Lease, and the
Expansion Improvements shall be deemed to be a part of the Premises for all
purposes under this Lease. Landlord and Tenant will enter into an amendment to
this Lease to incorporate the Expansion Improvements into the Premises as of the
date Tenant's Expansion Work is substantially completed and to make such other
necessary adjustments to this Lease (including, to the extent necessary an
extension of the term to ten (10) years as provided above) as mutually agreed by
the parties.

          d)  In the event Tenant determines not to exercise its Phase Two
Option and stops paying to Landlord the Reservation Fee, Landlord shall be
permitted to build the Second Building as set forth and in a manner consistent
with the Expansion Improvements Plan and without disturbing Tenant's use and
occupancy of the Premises and lease space within the Second Building to one or
more tenants on terms and conditions acceptable to Landlord. In such event,
Landlord shall not construct the connector between Phase One and Phase Two and
Tenant's original Premises shall at all times remain a stand alone building. In
the event Tenant determines that it does not desire to exercise the Phase Two
Option, Tenant agrees to provide written confirmation of such determination upon
Landlord's request. Notwithstanding the foregoing, in such event Landlord and
Tenant shall enter into a mutually satisfactory amendment to this Lease which
shall set forth the allocation of Operating Expenses which are applicable to the
entire Land, the Building and the Second Building such as landscaping, snow
removal, parking lot maintenance, real estate taxes (if the parcels are not
separately assessed), management fees (not to exceed 4.0% of gross rental
revenues) and Tenant's obligation to pay its Proportionate Share of such costs
allocable to the Premises which shall be paid monthly on an estimated basis
subject to customary annual reconciliation and audit rights. In the event Tenant
does not occupy the Second Building, Tenant shall continue to remain liable for
one hundred percent (100%) of all Operating Expenses attributable solely to
Phase One. Notwithstanding the existence of the Second Building, Tenant may
still self manage the Premises, but shall not be obligated to manage or provide
services or otherwise by liable for the operations, management or Operating
Expenses associated with or allocable to the Second Building and the Land
associated therewith.

39. MISCELLANEOUS:

          a)  Entire Agreement; Interpretation; Modification. This Lease
constitutes the entire agreement between the parties hereto with respect to the
Premises and there are no other agreements or understandings. This Lease shall
not be modified except by written instrument executed by both parties. The
captions used herein are for convenience only, and are not part of the Lease.
This Lease shall be construed in accordance with the laws of the Commonwealth of
Pennsylvania. Exhibits "A" through "F" are attached hereto and made a part
hereof. The masculine

                                      -33-
<PAGE>

(or neuter) pronoun, singular number, shall include the masculine, feminine and
neuter genders and the singular and plural number.

          b)  Captions and Headings. The captions and headings of sections,
subsections and the table of contents herein are for convenience only and are
not intended to indicate all of the subject matter in the text and they shall
not be deemed to limit, construe, affect or alter the meaning of any provisions
of this Lease and are not to be used in interpreting this Lease or for any other
purpose in the event of any controversy.

          c)  Severability. If any term or provision of this Lease, or the
application thereof to any person or circumstance shall, to any extent, be
invalid or unenforceable, the remainder of this Lease, or the application of
such term or provision to persons or circumstances other than those as to which
it is held invalid or unenforceable, shall not be affected thereby, and each
term and provision of this Lease shall be valid and be enforced to the fullest
extent permitted by law.

          d)  Joint and Several Liability. If two or more individuals,
corporations, partnerships or other persons (or any combination of two or more
thereof) shall sign this Lease as Tenant, the liability of each such individual,
corporation, partnership or other persons to pay the Rent and perform all other
obligations under this Lease shall be deemed to be joint and several, and all
notices, payments and agreements given or made by, with or to any one of such
individuals, corporations, partnerships or other persons shall be deemed to have
been given or made by, with or to all of them. In like manner, if Tenant shall
be a partnership or other legal entity, the members of which are, by virtue of
any applicable law or regulation, subject to personal liability, the liability
of each such member shall be joint and several.

          e)  Relationship of Parties. This Lease shall not create any
relationship between the parties other than that of Landlord and Tenant.

          f)  Choice of Law. The terms of this Lease shall be construed under
the laws of the Commonwealth of Pennsylvania, and that exclusive jurisdiction
and venue shall be in the Court of Common Pleas of the County in which the
Property is located without regard to principles of choice or conflict of law;
the personam jurisdiction to which each party submits.

          g)  Time is of the Essence. Time is of the essence in all provisions
of this Lease.

          h)  Authority. Tenant hereby covenants and warrants that: Tenant is a
duly formed corporation qualified to do business in the Commonwealth of
Pennsylvania; Tenant will remain qualified to do business in said state
throughout the Term and any renewals thereof; and the persons executing this
Lease on behalf of the Tenant are duly authorized by such corporation to execute
and deliver this Lease on behalf of the corporation.

          i)  Attorneys Fees. In an action between Landlord and Tenant arising
hereunder, the reasonable legal fees and costs incurred by the prevailing party
will be paid by the other party to the action.

     IN WITNESS WHEREOF, the parties hereto have executed this Lease, under
seal, as of the day and year first above written.

                                      -34-
<PAGE>

<TABLE>
<S>                                               <C>
                                                  LANDLORD:

                                                  LV ASSOCIATES, L.P.

                                                  By:  LV REALTY INC., Its General partner

ATTEST:  /s/  Jack D. Loew, Secretary             By:  /s/  Jack D. Loew, President
       -----------------------------------           -----------------------------------------

                                                  Date: 9/24/01

                                                  TENANT:

                                                  VIROPHARMA INCORPORATED

ATTEST:  /s/  Thomas F. Doyle                     By:  /s/  Vincent J. Milano
       -----------------------------------           -----------------------------------------

(Seal)                                            Date: 9/21/01
</TABLE>

                                      -35-
<PAGE>

                                  EXHIBIT A:
                                  ---------

                         LEGAL DESCRIPTION OF THE LAND

  [The following is required for the Edgar filing and is not included in the
Agreement of Lease:  Exhibit A is a schematic representation of the Title Plan
   that reflects the property that is the subject of the Agreement of Lease]

                                      -36-
<PAGE>

                                  EXHIBIT B:
                                  ----------

                     CONFIRMATION OF LEASE TERM AGREEMENT

                          [Intentionally left blank]

                                      -37-
<PAGE>

                                  EXHIBIT C:
                                  ----------

                       BASE BUILDING AND SITE WORK PLANS

                    SINGLE TENANT TWO-STORY OFFICE BUILDING

                                  32,182 S.F.

                                     WI'S
                             EAGLE VIEW BOULEVARD
                        UWCILLAN TOWNSHIP, PENNSYLVANIA

                  Base Building and Site work Specifications
                               September 20,2001

Note:  Any reference herein to "Contractor" refers to landlord's contractor, D.
Fickler Construction, LLC.

GENERAL REQUIREMENTS
------- ------------

Permits and Inspections:
Contractor will obtain and pay for all permits required from the Pennsylvania
State Labor and Industry and local municipality for the shell building. The
pricing includes Geotechnical monitoring of the site and building, including
soils compaction data, footing bottom inspection, and concrete testing.

Construction Facilities and Services:
A full-time superintendent will be provided to monitor and supervise the day-to-
day construction activities. The site will have temporary facilities, including
job trailer and temporary utilities. At the end of the project, Contractor will
perform a construction cleanup in preparation for turnover to the owner.

Quality Assurance:
All work shall be performed in accordance with local and state building codes
and per the recommendations of the applicable building associations. Contractor
will warrant all work for a period of one year from the time of substantial
completion.

Work Not Included in the Contract:
The following items are not provided by Contractor in the base contract:
                         .  Space planning and interior design services.

SITE WORK
---------

General:
D. Fielder Construction, LLC will provide all site work necessary to construct
the Phase I building and related site work

                                      -38-
<PAGE>

per the plans and in accordance with Uwchlan Township. This will include
earthwork, erosion control, storm water management, curb, paving, utility work,
and site lighting for the portion of work noted as Phase I on the plans.

Lot #8-- Eagleview Boulevard
Base Building and Site work Specifications
Page 2

Paving and Curbing:
To be constructed as per plans and specifications.

Landscaping:
DFC will spread topsoil and finish grade lot. All actual landscaping to be
contracted by the owner.

Utilities:
D. Fickler Construction, LLC shall provide and/or coordinate the installation of
water mains for domestic use and fire protection, electric, gas, and telephone
services for Phase I only.

Work Not Included in the Contract:
The following items are not provided by Contractor in the base contract:
     .   Phase II utilities.
     .   Phase II curbing and paving.

CONCRETE
--------

General:
Contractor will provide all concrete work required for the project in accordance
with A.C.I. (American Concrete Institute) general requirements. All concrete
shall have a minimum compressive strength of 3000 psi in 28 days.

Foundations:
Contractor will provide all reinforced wall and column footings required to
support floors, walls, and structural members. The footing design assumes a soil
bearing capacity of 3000 psi.

Slabs:
Concrete slabs shall be provided as follows:

     .   First floor office: 4" of concrete over 4" of stone
     .   Second floor office: 3" of concrete on metal deck
     .   Exterior sidewalks: 4" of concrete over 4" of stone

All slabs shall be reinforced with a minimum of 6/6, 10 x 10 wire mesh.

MASONRY
-------

General:
The building shall be 4" brick veneer over 8" concrete masonry units (CMU) below
the first floor windows and 4" brick veneer on prefabricated structural wall
panels above the first floor and second floor windows. Decorative masonry

                                      -39-
<PAGE>

elements, including three (3) decorative off-white brick bands and precast
concrete windowsills, shall be provided. Brick selections to be determined.

                                      -40-
<PAGE>

Lot #8-- Eagleview Boulevard
Base Building and Sitework Specifications
Page 3

METALS
------

Structural Steel: D.
Fickler Construction, LLC will provide all required steel for the building
shell. All structural steel work shall be performed in accordance with the
American Institute of Steel Construction (A.I.S.C.). All steel joists shall be
in accordance with the Steel Joist Institute. The roof will be designed for a
live snow load of 30 pounds per square foot. The second floor shall be designed
with 100 pounds per square foot live load. The building will be supported by
means of a freestanding structural steel framework. Steel bar joists will
support the second floor slabs and the roof. D. Fickler Construction, LLC will
provide all miscellaneous steel consisting of interior fire tower stair, one
ornamental lobby stair, roof access ladder, and miscellaneous site handrails.

Metal Panels:
Prefabricated wall panels will be installed to create brick panels between
floors and the wall/roof system above the second floor windows. All panels will
be designed under the supervision of a structural engineer.

Work Not Included in the Contract:
The following items are not provided by D. Fickler Construction in the base
contract:

       .  Roof screens.

CARPENTRY
---------

Rough Carpentry:
Contractor shall furnish and install all miscellaneous carpentry necessary for
the construction of soffits at the building entrance areas and any miscellaneous
carpentry to build the building.

THERMAL AND MOISTURE
------- --- --------

Roofing:
The roof of the building will be constructed using a .045 EPDM rubber roofing
system over a mechanically-fastened R-19 rigid insulation board. The roof area
will be internally drained. Roof shall have a fifteen (15) year manufacturer's
roofing warranty.

Exterior Finish System (E.I.F.S.):
Exterior soffit at the front entrance canopy and along the road elevation will
                         be metal framed and faced with dryvit.

Miscellaneous:
4" batt insulation shall be installed along all exterior walls. Control joints
and window systems will be caulked using a two-part polyurethane. A roof hatch
will be provided in the second floor janitor's closet.

                                      -41-
<PAGE>

Lot #8 -- Eagleview Boulevard
Base Building and Site work Specifications
Page 4

DOORS AND WINDOWS
-----------------

Interior Doors:
All interior doors shall be 3068 solid core Oak veneer set in hollow metal
frames. Doors shall receive light-duty commercial lever-type hardware meeting
all applicable codes. Panic hardware and exit devices will be provided as
required by applicable building codes.

Glass and Glazing:
The building will have six foot high windows manufactured by Kawneer, or equal.
All windows shall be one inch insulated glass set in thermal-break aluminum
frames. The main entrance shall be constructed with a curtain wall system with
medium style doors and vestibule.

LOBBY WORK
----------

Framing and Drywall:
All interior drywall walls will be constructed to create the lobby area at the
first and second floor, two (2) handicapped bathroom facilities per floor, the
lobby stair, elevator, exit corridors at the stair tower, and first floor
mechanical room required for the building. Walls will be constructed of 3 5/8"
steel studs, 16" on center, with 1/2" drywall on each side. Insulation for noise
control shall be provided in all partitions. The walls creating the lobby areas
and exit corridors shall be one hour rated. We will construct HVAC shaft walls
between floors.

Finishes: The finishes for the lobby will be substantially similar to those
specified at Lot #15 on General Warren Boulevard.

SPECIALITIES:
-------------

General: Bathroom fit-up, consisting of minors, Corian counters, and standard
bathroom accessories, will be provided in each of the restrooms. Fire
extinguishers will be installed throughout the building in accordance with local
authorities.

CONVEYING SYSTEMS:
------------------

Elevator:
Contractor will furnish and install one (1) 3000# capacity, cab size of
approximately 4'-3' x 6'-8", 2- stop, 125 feet per minute standard finish car,
elevator system.

MECHANICAL:
-----------

Fire Protection:
The building will be fully sprinklered in accordance with NFPA 13 (ordinary
hazard). All finished ceilings shall have semi-recessed, chrome-plated sprinkler
heads. The tenant areas will have upright brass heads. Miscellaneous equipment,
including main riser with flow and tamper switches, inspector test, fire
department connection and sprinkler cabinet, will be installed as required.

                                      -42-
<PAGE>

Lot #8 -- Eagleview Boulevard
Base Building and Sitework Specifications
Page 5

Plumbing:
The roof water will be internally drained, collected, and distributed to the
storm water management system. Domestic water distribution and sanitary sewer
piping is provided. All fixtures will be American Standard (or equal) as shown
on the floor plans. Plumbing is provided to create two (2) multi-person
bathrooms in the building core on each floor as shown on the plans.

HVAC:
The base building HYAC system shall be in accordance with ASHRAE and SMACNA
standards. The system shall be designed with a capacity to maintain a typical
office environment space condition with an adequately designed fit-up as
follows:

     Summer:   75 degree dry bulb with 50% maximum relative humidity, at an
               outdoor temperature of 95-degree dry bulb.

     Winter:   70 degree dry bulb with 50% maximum relative humidity, at an
               outdoor temperature of 0-degree dry bulb.

Outdoor air for the office will be introduced in accordance with ASHIRAE and
SMACNA standards.

The extent of shell ductwork basically pierces the second floor to feed the
first floor and has four foot (4') of ductwork off of the units servicing the
second floor space. The units serving the building will be a combination of 7
1/2 through 12 ~/2 ton units and are set up to be operated as part of a VVT
control system.

Work Not Included in the Contract:
The following items are not provided by Contractor in the base contract:

          .    Ductwork, VVT boxes or run-out for the tenanted space.
          .    Humidification control.
          .    Computerized energy management systems.
          .    Drinking fountains.

ELECTRICAL:
-----------

Service and Distribution:
Contractor will perform all work not provided by the power company to supply a
120V/208V - 3 phase electric service. This includes primary and secondary work
and main distribution switchgear and house service in an electrical room.

Site Lighting:
DFC will supply and install pole lighting for parking lot illumination as shown
on the plan. Site lighting to be controlled by timeclock and photocell. We have
also provided two (2) decorative site lights at the main building entrance and
three (3) along Eagleview Boulevard.

                                      -43-
<PAGE>

Lot #8 -- Eagleview Boulevard
Base Building and Site work Specifications
Page 6

Power:
Lobby and corridor convenience receptacles are included. Bathrooms will have
ground fault-type receptacles. We have included an entry access system for
building ingress.

Lobby Lighting:
We have provided lobby and bathroom lighting similar to 40 General Warren
Boulevard.

Emergency Systems:
We have included all battery-type emergency and exit lighting required by
applicable building codes.

Fire and Security:
We have included fire alarm with pull stations for the core areas (lobby, stair
and interior corridors), along with a card access system for the building's
exterior entrance. (Note:
Card access system is expandable for multi-tenant use.)

Work Not Included in the Contract:
The following items are not provided by Contractor in the base contract:

     .  Electric for tenant space.
     .  Emergency generator or uninterrupted power sources.
     .  Computer or telecommunications wiring or devices.
     .  Bollards lights.
     .  Tenant fire and security systems.

END OF SPECIFICATION

[The following is required for the Edgar filing and is not included in the
Agreement of Lease:  The remainder of this Exhibit C are schematic building
plans]

                                      -44-
<PAGE>

                                  EXHIBIT D:
                                  ----------

                     BASE BUILDING AND SITE WORK SCHEDULE

  [The following is required for the Edgar filing and is not included in the
Agreement of Lease:  Exhibit D consists of bar charts reflecting the anticipated
                            construction schedule]

                                      -45-
<PAGE>

                                  EXHIBIT E:
                                  ----------

                         PRELIMINARY TENANT WORK PLANS

  [The following is required for the Edgar filing and is not included in the
  Agreement of Lease:  Exhibit E consists of schematic representations of the
                        anticipated office floor plan]

                                      -46-
<PAGE>

                                  EXHIBIT F:
                                  ----------

                          EXPANSION IMPROVEMENTS PLAN

[The following is required for the Edgar filing and is not included in the
Agreement of Lease:  Exhibit F is a schematic representation of the Title Plan
that reflects the property that is the subject of the Agreement of Lease with
portions of said property highlighted to designate the Expansion Improvement
Plan]

                                      -47-<PAGE>

                                                                    EXHIBIT 10.1

                WAIVER AND FIFTH AMENDMENT TO CREDIT AGREEMENT

     This WAIVER AND FIFTH AMENDMENT TO CREDIT AGREEMENT (this "Amendment") is
dated as of October 4, 2001, and is entered into by and among Opinion Research
Corporation, a Delaware corporation ("Parent"), ORC Inc., a Delaware corporation
("ORC"; Parent and ORC are sometimes referred to individually as a "Borrower"
and collectively as the "Borrowers"), Heller Financial, Inc., individually as a
Lender and in its capacity as agent (in such capacity, "Agent") for the Lenders
party to the Credit Agreement described below, and the Lenders which are
signatories hereto.

     WHEREAS, Agent, Lenders (other than New Lender, which is becoming a party
to the Credit Agreement pursuant to Section 4 of this Amendment) and Borrowers
are parties to a certain Credit Agreement dated as of May 26, 1999 (as such
agreement may from time to time be amended, supplemented or otherwise modified,
the "Credit Agreement"); and

     WHEREAS, the parties hereto desire to amend the Credit Agreement by
increasing the amount of the Revolving Loan Commitment and making such other
amendments to the Credit Agreement as are more fully set forth herein.

     NOW THEREFORE, in consideration of the mutual conditions and agreements set
forth in the Credit Agreement and this Amendment, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto hereby agree as follows:

     1.   Definitions.  Capitalized terms used in this Amendment, unless
          -----------
otherwise defined herein, shall have the meaning ascribed to such terms in the
Credit Agreement.

     2.   Waiver.  Upon satisfaction of the conditions precedent set forth in
          ------
Section 5 below, and in reliance upon the representations and warranties of
---------
Borrowers set forth herein, the Agent and the Lenders hereby waive the Event of
Default under Section 6.1(C) of the Credit Agreement arising from Borrowers'
breach of Section 3.15 of the Credit Agreement that occurred when Borrowers made
a $500,000 payment on July 31, 2001 with respect to the Macro Earn-Out at such
time as Section 3.15 prohibited such payment to be made.  This is a limited
waiver and shall not be deemed to constitute a waiver of any other Event of
Default or any future breach of the Credit Agreement or any of the other Loan
Documents.  Borrowers agree that they shall remain obligated to comply with the
terms of the Credit Agreement, including, but not limited to, Section 3.15
thereof, and that Agent and Lenders shall not be obligated in the future to
waive any provision of the Credit Agreement or any Loan Document.

     3.   Amendments.  Subject to the conditions set forth below, the Credit
          ----------
Agreement is amended as follows:

     (a)  The Lenders, Agent and Borrowers hereby agree that each Lender's
commitment to make Revolving Loans and the outstanding principal amount of each
Lender's Term Loan shall be amended and restated as set forth on Schedule 4(b)
                                                                 -------------

                                       1
<PAGE>

hereto. The Lenders, Agent and Borrowers hereby agree that the defined term "Pro
Rata Share" set forth in Section 10.1 of the Credit Agreement shall be deemed to
be amended in all relevant respects to give effect to the terms of the preceding
sentence.

     (b)  Section 1.1(A) of the Credit Agreement is amended by (i) inserting in
the table of Scheduled Installments a new Scheduled Installment due and payable
on June 1, 2004 in the amount of $11,375,000 and (ii) deleting all Scheduled
Installments due and payable on and after June 30, 2004.

     (c)  Section 1.1(B)(1) of the Credit Agreement is amended in its entirety
and as so amended shall read as follows:

          (B)  Revolving Loans.  (1) Each Lender agrees, severally and not
               ---------------
     jointly, to lend to Borrowers from the Closing Date to the Expiry Date its
     Pro Rata Share of the loans requested by Parent, on behalf of Borrowers, to
     be made by Lenders under this subsection 1.1(B), up to an aggregate maximum
     for all Lenders of (i) $20,000,000 until the Fifth Amendment Effective Date
     and (ii) $24,000,000 on and after the Fifth Amendment Effective Date (as
     the same may be reduced and otherwise in effect from time to time
     hereunder, the "Revolving Loan Commitment").  Advances or amounts
     outstanding under the Revolving Loan Commitment will be called "Revolving
     Loans".  Revolving Loans may be repaid and reborrowed.  The Revolving Loans
     shall be repaid in full on the Expiry Date.  The "Maximum Revolving Loan
     Balance" will be the lower of:

          (a)  the "Borrowing Base" (as calculated on Exhibit 4.8(E), the
     "Borrowing Base Certificate") less the sum of (i) outstanding Risk
                                   ----
     Participation Liability, plus (ii) the Earn-Out Reserve; or
                              ----

          (b)  the Revolving Loan Commitment less the sum of (i) outstanding
                                             ----
     Risk Participation Liability, plus (ii) the Earn-Out Reserve.
                                   ----

     The amount computed under clause (a) of the immediately preceding sentence
     is herein referred to as "Borrowing Base Availability".  If at any time the
     outstanding Revolving Loans exceed the Maximum Revolving Loan Balance (as
     it may be deemed increased from time to time pursuant to subsection
     1.1(B)(2)), Lenders shall not be obligated to make Revolving Loans and
     issue Lender Letters of Credit and Risk Participation Agreements, and
     Revolving Loans must be repaid immediately in an amount sufficient to
     eliminate any excess.  Revolving Loans may be requested in any amount with
     one (1) Business Day prior notice required for amounts equal to or greater
     than $5,000,000.  For amounts less than $5,000,000, written or telephonic
     notice must be provided by noon Chicago time on the day on which the Loan
     is to be made.  All LIBOR Loans require three (3) Business Day's notice.
     All Loans requested telephonically must be confirmed in writing within one
     (1) Business Day.  Neither Agent nor any Lender shall incur any liability
     to Borrowers for acting upon any telephonic notice that Agent believes in
     good faith to have been given by a duly authorized officer or other person
     authorized to borrow on behalf of Borrowers.

                                       2
<PAGE>

     The parties hereto hereby agree that Borrowers shall be permitted to borrow
     up to $5,000,000 of Revolving Loans on the Fifth Amendment Effective Date
     to satisfy all outstanding obligations with respect to the Macro Earn-Out.

     (d)  The definition of "Base Rate Margin" in Section 1.2(A) of the Credit
Agreement shall be amended in its entirety and as so amended shall read as
follows:

          "Base Rate Margin" shall mean, as of October 4, 2001, two percent
     (2.00%) per annum.

     (e)  The definition of "LIBOR Margin" in Section 1.2(A) of the Credit
Agreement shall be amended in its entirety and as so amended shall read as
follows:

          "LIBOR Margin" shall mean, as of October 4, 2001, three and one-
     quarter percent (3.25%) per annum.

     (f)  Section 1.2(A) of the Credit Agreement is amended by deleting in its
entirety from such section each of the following: (i) the definition of "Total
Indebtedness to Adjusted EBITDA Ratio", (ii) the Pricing Table and (iii) the
paragraph immediately following the Pricing Table.

     (g)  Subsection (C) of Section 1.3 of the Credit Agreement is amended by
inserting the parenthetical "(including reasonable attorneys' fees and legal
expenses, which may consist of fees and legal expenses of outside counsel
retained by Agent or any Lender or the allocated costs of in-house counsel of
Agent or any Lender)" immediately after the phrase "Borrowers' agree to promptly
pay all fees, costs and expenses" set forth in the second sentence thereof.

     (h)  Section 3.1(B) of the Credit Agreement is amended by deleting the
phrase "amount of all Loans" in such section and inserting in lieu thereof the
phrase "amount of all such intercompany Indebtedness".

     (i)  Section 3.5 of the Credit Agreement is amended by (i) deleting the
current subsection (C) thereof in its entirety and (ii) redesignating subsection
(D) thereof as subsection (C).

     (j)  Subsection (B) of Section 4.5 of the Credit Agreement is amended in
its entirety and as so amended shall read as follows:

          (B)  Borrowers shall not permit Total Interest Coverage for any twelve
     (12) month period ending on the last day of any calendar quarter ending on
     the date set forth below to be less than the ratio set forth below for such
     period:

                                       3
<PAGE>

          Period Ending                                         Ratio
          -------------                                         -----

          December 31, 2000 through December 31, 2001           2.50
          March 31, 2002 & the last day
           of each calendar quarter thereafter                  2.75

     (k)  Section 4.6 of the Credit Agreement is amended in its entirety and as
so amended shall read as follows:

          4.6  Senior Indebtedness to Adjusted EBITDA Ratio. Borrowers shall not
               --------------------------------------------
     permit the ratio of Senior Indebtedness calculated as of the last day of
     any calendar quarter ending during any of the periods set forth below to
     Adjusted EBITDA for the twelve (12) month period ending on such day to be
     greater than the amount set forth below for such period.

               Period Ending                                   Amount
               -------------                                   ------

               June 30, 1999 through September 30, 2000        3.00
               December 31, 2000 through December 31, 2001     2.75
               March 31, 2002 through September 30, 2002       2.50
               December 31, 2002 & the last day of each
                 calendar quarter thereafter                   2.25

     "Senior Indebtedness" shall be calculated as illustrated on Exhibit 4.8(C).

     (l)  Subsection (B) of Section 4.8 of the Credit Agreement shall be amended
by deleting the "." at the end of such subsection and inserting in lieu thereof
the following:

          and (4) commencing with the fiscal year of Borrowers ending December
     31, 2001, an "Auditor's Privity" letter from the Certified Public
     Accountants described in the immediately preceding clause (3), such letter
     to be in form and substance reasonably acceptable to Agent and addressed to
     Agent and Lenders.

     (m)  Clause (a) of Section 8.1 of the Credit Agreement shall be amended in
its entirety and as so amended shall read as follows:

          (a)  such Lender (excluding Heller) shall first obtain the written
     consent of Agent, which consent shall not be unreasonably withheld and,
     provided no Default or Event of Default has occurred and is continuing,
     Borrowers (which consent of Borrowers shall not be unreasonably withheld or
     delayed); provided Borrowers' consent shall not be required with respect to
     an assignment by a Lender to an affiliate thereof;

     (n)  Section 9.13 of the Credit Agreement shall be amended by inserting the
phrase "or Affiliates" immediately after the phrase "or such Lender's assignees
or participants" set forth in such section.

                                       4
<PAGE>

     (o)  The definition of "Earn-Out Reserve" set forth in Section 10.1 of the
Credit Agreement is amended in its entirety and as so amended shall read as
follows:

          "Earn-Out Reserve" means as of any calculation date, the aggregate
     amount calculated with respect to the Macro Earn-Out as set forth herein.
     Calculations of the Earn-Out Reserve shall be made as of the earlier of (a)
     each date on which the amount of an earn-out payment with respect to the
     Macro Earn-Out is determinable or (b) each date which is forty-five (45)
     days prior to the date on which such payment is to be made.  The Earn-Out
     Reserve shall equal the amount of the earn-out payment to be made or, if
     the amount is in dispute, the maximum amount which may be payable in
     respect of the Macro Earn-Out.  At such time as a payment is made in
     respect of the Macro Earn-Out, the Earn-Out Reserve shall be reduced on a
     dollar for dollar basis.

     (p)  The definition of "Expiry Date" set forth in Section 10.1 of the
Credit Agreement is amended by deleting the date "May 31, 2005" in clause (c) of
said definition and inserting in lieu thereof the date "June 1, 2004".

     (q)  Section 10.1 of the Credit Agreement shall be amended by adding
thereto the new defined terms "Fifth Amendment" and "Fifth Amendment Effective
Date" in proper alphabetical order, such definitions to read as follows:

          "Fifth Amendment" means that certain Waiver and Fifth Amendment to
     Credit Agreement dated as of October 4, 2001 by and among Agent, Lenders
     (including the Exiting Lender and the New Lender thereto) and Borrowers.

          "Fifth Amendment Effective Date" means the date upon which all of the
     conditions precedent to the effectiveness of the Fifth Amendment shall have
     been satisfied."

     (r)  The Credit Agreement and each Loan Document shall be generally amended
by deleting from such agreements the term "ProTel Earn-Out" in each instance
where such term is used in such agreements.

     (s)  Exhibits 4.8(C) and 4.8(E) to the Credit Agreement shall be deleted in
their entirety and replaced with Exhibits 4.8(C) and 4.8(E) attached hereto.

     4.   Lender Joinder.
          --------------

     (a)  PNC BANK, NATIONAL ASSOCIATION, a national banking association (the
"New Lender") and the Lenders, other than the New Lender (the "Existing
Lenders"), hereby agree that, upon giving effect to the assignments and
acceptances described below, (i) the New Lender shall be a party to the Credit
Agreement and shall have all of the rights and obligations under the Loan
Documents, and shall be deemed to have made all of the covenants and agreements
contained in the Loan Documents, arising out of or otherwise related to the
assigned interests in the Loans, and (ii) the Existing Lenders shall be
absolutely released from any of such obligations, covenants and agreements
assumed or made by the New Lender in respect of the assigned interests in the
Loans. The New Lender hereby acknowledges and agrees that the agreement set
forth in this Section 4 is expressly made for the benefit of Borrowers, Agent
and the Existing Lenders and their respective successors and permitted assigns.

                                       5
<PAGE>

     (b)  Each Lender, including without limitation the New Lender, hereby
agrees that the Lenders' Pro Rata Shares of the Revolving Loan Commitment and
the Term Loan, in each case effective upon the effectiveness of the amendments
set forth above, shall be as set forth on Schedule 4(b) hereto. To the extent
                                          -------------
necessary to give effect to the provisions of the preceding sentence, the
Existing Lenders hereby agree on the date hereof to sell and to assign to each
other Lender (including, without limitation, the New Lender), without recourse,
representation or warranty (except as set forth below), and each such other
Lender hereby purchases and assumes from such Existing Lenders, a percentage
interest in the Revolving Loan Commitment and the Term Loan in amounts required
to give effect to the Pro Rata Shares set forth on Schedule 4(b) hereto. The
                                                   -------------
Lenders hereby agree, on the effective date of the amendments set forth above,
to effect such inter-Lender transfers to give effect to the respective Pro Rata
Shares set forth on such Schedule 4(b). The Credit Agreement is hereby amended
                         -------------
in all relevant respects to give effect to the respective Pro Rata Shares set
forth on Schedule 4(b). As a result of such assignments and acceptances, the
         -------------
Existing Lenders are absolutely released from any of such obligations, covenants
and agreements, to the extent of their assigned shares of the Term Loans and the
Revolving Loan Commitment (it being understood that Finova Capital Corporation
(the "Exiting Lender") is hereby assigning all of its interests with respect to
the Revolving Loan Commitment and outstanding principal amount of Term Loans of
such Lender, and upon such assignment Finova Capital Corporation shall no longer
be deemed to be a Lender under the Credit Agreement). Interest accrued on the
Loans transferred as contemplated by this paragraph and fees accrued in respect
of the commitments transferred as contemplated by this paragraph shall accrue to
the transferor Lender through the date such transfer is actually made by payment
by the transferee Lender for such Loans transferred and such interest and fees
shall accrue to the transferee Lender thereafter.

     (c)  Each Existing Lender represents and warrants that it is the legal and
beneficial owner of the portion of the Loans assigned above, free and clear of
any adverse claim.

     (d)  Neither the Existing Lenders nor the Agent makes any representation or
warranty to the New Lender with respect to, and shall not be responsible to the
New Lender for, the execution, effectiveness, genuineness, validity,
enforceability, collectibility or sufficiency of any of the Loan Documents or
for any representations, warranties, recitals or statements made therein or made
in any written or oral statements or in any financial or other statements,
instruments, reports or certificates or any other documents furnished or made by
or on behalf of Borrowers or any other Loan Party in connection with the Loan
Documents and the transactions contemplated thereby or for the financial
condition or business affairs of Borrowers or any other Loan Party, nor shall
the Existing Lenders or the Agent be required to ascertain or inquire as to (i)
the performance or observance of any of the terms, conditions, provisions,
covenants or agreements contained in any of the Loan Documents, (ii) the use of
the proceeds of the Loans, (iii) the use of the Lender Letters of Credit or Risk
Participation Liability or (iv) the existence or possible existence of any Event
of Default or Default.

                                       6
<PAGE>

     (e)  The New Lender represents and warrants that it satisfies any
eligibility requirements to be a Lender under the Credit Agreement; that it is
not a foreign person (i.e., a person other than a United States person for
United States Federal income tax purposes); that it has experience and expertise
in the making or the purchasing of loans such as the Loans; that it has acquired
an interest in the Loans for its own account and without any present intention
of selling all or any portion of such interest; and that it has received,
reviewed and approved a copy of the Credit Agreement (including all Exhibits and
Schedules thereto) and copies of all other Loan Documents which it has
requested.

     (f)  The New Lender represents and warrants that it has received such
financial information regarding Borrowers and the other Loan Parties as such New
Lender has requested, that it has made its own independent investigation of the
financial condition and affairs of Borrowers and the other Loan Parties in
connection with the assignment evidenced by this Amendment, and that it has made
and shall continue to make its own appraisal of the creditworthiness of
Borrowers and the other Loan Parties. Neither Existing Lenders nor Agent shall
have any duty or responsibility, either initially or on a continuing basis, to
make any such investigation or any such appraisal on behalf of the New Lender or
to provide the New Lender with any other credit or other information with
respect thereto, whether coming into its possession before the effective date of
this Amendment or at any time or times thereafter, and neither the Existing
Lenders nor Agent shall have any responsibility with respect to the accuracy of
or the completeness of any information provided to the New Lender.

     (g)  Each Lender party to this Amendment represents and warrants to the
other Lenders and Agent that it has full power and authority to enter into this
Amendment and to perform its obligations hereunder in accordance with the
provisions hereof, that this Amendment has been duly authorized, executed and
delivered by such party and that this Amendment constitutes a legal, valid and
binding obligation of such party, enforceable against such party in accordance
with its terms, except as enforceability may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or other similar laws
affecting creditors' rights generally and by general principles of equity.

     (h)  Any notice or other communication required or permitted to be given to
the New Lender shall be given in the manner set forth in the Credit Agreement
and addressed as follows:

               PNC BANK, NATIONAL ASSOCIATION
               Two Tower Center Blvd.
               East Brunswick, NJ 08816
               Attention: Jeffrey Blakemore
               Telecopy:  (732) 220-2296

     5.   Conditions Precedent.  The effectiveness of this Amendment is subject
          --------------------
to the following conditions precedent:

                                       7
<PAGE>

     (a)  Lenders and Borrowers shall have executed and delivered (and Borrowers
covenant to execute and deliver) this Amendment, and Borrowers and the other
Loan Parties shall have executed and delivered to Agent such other documents and
instruments as Agent may have reasonably required;

     (b)  All proceedings taken in connection with the transactions contemplated
by this Amendment and all documents, instruments and other legal matters
incident thereto shall be satisfactory to Agent and its legal counsel;

     (c)  Both before and after giving effect to the transactions contemplated
in this Amendment, no Default or Event of Default shall have occurred and be
continuing (other than the Event of Default described in Section 2 hereof);

     (d)  There shall have occurred no material adverse change in the business,
operations, financial condition, profits or prospects of Borrowers and their
Subsidiaries, or in the Collateral since December 31, 2000;

     (e)  Borrowers shall have paid to the Agent, for the benefit of the Lenders
(other than the New Lender and the Exiting Lender) who have executed this
Amendment a consent fee in the amount of $187,950.00, such fee to be payable to
the Lenders (other than the New Lender and the Exiting Lender) in the following
amounts: (i) $60,412.50 to be paid to Heller Financial, Inc., (ii) $55,937.50 to
be paid to First Union National Bank, (iii) $35,800.00 to be paid to Merrill
Lynch Business Financial Services, Inc. and (iv) $35,800.00 to be paid to Fleet
National Bank; and

     (f)  payment of all fees, costs and expenses as agreed to between Borrower
and each Lender or Agent as set forth in such Lender's or Agent's respective fee
letter with Borrower.

     6.   Representations and Warranties.  To induce Agent and Lenders to enter
          ------------------------------
into this Amendment, each Borrower represents and warrants to Agent and Lenders:

     (a)  that the execution, delivery and performance of this Amendment has
been duly authorized by all requisite corporate action on the part of each
Borrower and that this Amendment has been duly executed and delivered by each
Borrower; and

     (b)  that each of the representations and warranties set forth in the
Credit Agreement (other than those which, by their terms, specifically are made
as of certain date prior to the date hereof) and in each Loan Document are true
and correct in all material respects as of the date hereof.

     7.   Severability.   Any provision of this Amendment held by a court of
          ------------
competent jurisdiction to be invalid or unenforceable shall not impair or
invalidate the remainder of this Amendment and the effect thereof shall be
confined to the provision so held to be invalid or unenforceable.

                                       8
<PAGE>

     8.   References.  Any reference to the Credit Agreement contained in any
          ----------
document, instrument or agreement executed in connection with the Credit
Agreement shall be deemed to be a reference to the Credit Agreement as modified
by this Amendment.

     9.   Counterparts.  This Amendment may be executed in one or more
          ------------
counterparts, each of which shall constitute an original, but all of which taken
together shall be one and the same instrument.

     10.  Ratification.  The terms and provisions set forth in this Amendment
          ------------
shall modify and supersede all inconsistent terms and provisions of the Credit
Agreement and shall not be deemed to be a consent to the modification or waiver
of any other term or condition of the Credit Agreement. Except as expressly
modified and superseded by this Amendment, the terms and provisions of the
Credit Agreement are ratified and confirmed and shall continue in full force and
effect. The execution, delivery and effectiveness of this Agreement shall not
operate as a waiver of any right, power or remedy of Agent or any Lender under
the Credit Agreement or any Loan Document to which Agent or such Lender is a
party nor constitute a waiver of any provision in or Event of Default (now or
hereafter existing) under the terms of the Credit Agreement or any Loan Document
(other than the waiver provided for in Section 2 above). Agent's and Lenders'
agreement to the terms of this Amendment shall not be deemed to establish or
create a custom or course of dealing among Borrowers, Agent and Lenders.

        [rest of page intentionally left blank; signature page follows]

                                       9
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed under seal and delivered by their respective duly authorized
officers on the date first written above.

HELLER FINANCIAL, INC.,                 OPINION RESEARCH CORPORATION,
as Agent and Lender                     a Delaware corporation

By:    /s/ Francois Delangle            By:    /s/ Kevin P. Croke
   --------------------------------        --------------------------------
Name:  Francois Delangle                Name:  Kevin P. Croke
     ------------------------------          ------------------------------
Title: Vice President                   Title: EVP & Director of Finance
      -----------------------------           -----------------------------

FIRST UNION NATIONAL BANK,              ORC INC.,
as a Lender                             a Delaware corporation

By:    /s/ John L. Thomas               By:    /s/ Kevin P. Croke
   --------------------------------        --------------------------------
Name:  John L. Thomas                   Name:  Kevin P. Croke
     ------------------------------          ------------------------------
Title: Vice President                   Title: President
      -----------------------------           -----------------------------

FLEET NATIONAL BANK                     FINOVA CAPITAL CORPORATION,
as a Lender                             as Exiting Lender

By:    /s/ Thomas Hamilton              By:    /s/ William D. Robinson
   --------------------------------        --------------------------------
Name:  Thomas Hamilton                  Name:  William D. Robinson
     ------------------------------          ------------------------------
Title: Assistant Vice President         Title: VP, Senior Credit Officer
      -----------------------------           -----------------------------

MERRILL LYNCH BUSINESS FINANCIAL SERVICES, INC.,
as a Lender

By:    /s/ Valerie Wilder Moore
   --------------------------------
Name:  Valerie Wilder Moore
    -------------------------------
Title: Assistant Vice President
     ------------------------------

PNC BANK, NATIONAL ASSOCIATION,
as New Lender

By:    /s/ Jeffrey A. Blakemore
   --------------------------------
Name:  Jeffrey A. Blakemore
     ------------------------------
Title: Senior Vice President
      -----------------------------

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