EXHIBIT 10.9
                               BUILD-TO-SUIT LEASE


Landlord:     Britannia Hacienda V Limited Partnership

Tenant:       ProBusiness Services, Inc.

Date:         January 27, 1998



                                TABLE OF CONTENTS




                                                                   
1. PREMISES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
      1.1.    Premises . . . . . . . . . . . . . . . . . . . . . . . . .   1
      1.2.    Landlord's Reserved Rights . . . . . . . . . . . . . . . .   1
      1.3.    First Refusal Right (Leasing). . . . . . . . . . . . . . .   2
      1.4.    First Refusal Right (Purchase) . . . . . . . . . . . . . .   3

2. TERM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
      2.1.    Terms. . . . . . . . . . . . . . . . . . . . . . . . . . .   5
      2.2.    Early Possession . . . . . . . . . . . . . . . . . . . . .   5
      2.3.    Delay In Possession. . . . . . . . . . . . . . . . . . . .   5
      2.4.    Construction . . . . . . . . . . . . . . . . . . . . . . .   6
      2.5.    Acknowledgement Of Lease Commencement. . . . . . . . . . .   6
      2.6.    Holding Over . . . . . . . . . . . . . . . . . . . . . . .   7
      2.7.    Option To Extend Term. . . . . . . . . . . . . . . . . . .   7

3. RENTAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
      3.1.    Minimum Rental . . . . . . . . . . . . . . . . . . . . . .   7
      3.2.    Late Charge. . . . . . . . . . . . . . . . . . . . . . . .  11

4. TAXES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
      4.1.    Personal Property. . . . . . . . . . . . . . . . . . . . .  11
      4.2.    Real Property. . . . . . . . . . . . . . . . . . . . . . .  11
      4.3.    Challenge to Assessments . . . . . . . . . . . . . . . . .  11

5. OPERATING EXPENSES. . . . . . . . . . . . . . . . . . . . . . . . . .  12
      5.1.    Payment Of Operating Expenses. . . . . . . . . . . . . . .  12
      5.2.    Definition Of Operating Expenses . . . . . . . . . . . . .  13
      5.3.    Determination Of Operating Expenses. . . . . . . . . . . .  15
      5.4.    Final Accounting For Lease Year. . . . . . . . . . . . . .  15
      5.5.    Proration. . . . . . . . . . . . . . . . . . . . . . . . .  16

6. UTILITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
      6.1.    Payment. . . . . . . . . . . . . . . . . . . . . . . . . .  16
      6.2.    Interruption . . . . . . . . . . . . . . . . . . . . . . .  16

7. ALTERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
      7.1.    Right To Make Alterations. . . . . . . . . . . . . . . . .  16
      7.2.    Title To Alterations . . . . . . . . . . . . . . . . . . .  17
      7.3.    Tenant Fixtures. . . . . . . . . . . . . . . . . . . . . .  17
      7.4.    No Liens . . . . . . . . . . . . . . . . . . . . . . . . .  17

8. MAINTENANCE AND REPAIRS . . . . . . . . . . . . . . . . . . . . . . .  17
      8.1.    Landlord's Work. . . . . . . . . . . . . . . . . . . . . .  17
      8.2.    Tenant's Obligation For Maintenance. . . . . . . . . . . .  18
              (a)  Good Order, Condition And Repair. . . . . . . . . . .  18
              (b)  Landlord's Remedy . . . . . . . . . . . . . . . . . .  18
              (c)  Condition Upon Surrender. . . . . . . . . . . . . . .  19





                                                                   
9. USE OF PREMISES. . . .  . . . . . . . . . . . . . . . . . . . . . . .  19
      9.1.    Permitted Use. . . . . . . . . . . . . . . . . . . . . . .  19
      9.2.    [Omitted]. . . . . . . . . . . . . . . . . . . . . . . . .  19
      9.3.    No Nuisance. . . . . . . . . . . . . . . . . . . . . . . .  19
      9.4.    Compliance With Laws . . . . . . . . . . . . . . . . . . .  19
      9.5.    Liquidation Sales. . . . . . . . . . . . . . . . . . . . .  19
      9.6.    Environmental Matters. . . . . . . . . . . . . . . . . . .  20

10. INSURANCE AND INDEMNITY. . . . . . . . . . . . . . . . . . . . . . .  20
      10.1.   Insurance. . . . . . . . . . . . . . . . . . . . . . . . .  20
      10.2.   Quality Of Policies And Certificates . . . . . . . . . . .  21
      10.3.   Workers' Compensation. . . . . . . . . . . . . . . . . . .  21
      10.4.   Waiver of Subrogation. . . . . . . . . . . . . . . . . . .  21
      10.5.   Increase In Premiums . . . . . . . . . . . . . . . . . . .  22
      10.6.   Indemnification. . . . . . . . . . . . . . . . . . . . . .  22
      10.7.   Blanket Policy . . . . . . . . . . . . . . . . . . . . . .  22

11. SUBLEASE AND ASSIGNMENT. . . . . . . . . . . . . . . . . . . . . . .  22
      11.1.   Assignment And Sublease Of Premises. . . . . . . . . . . .  22
      11.2.   Rights Of Landlord . . . . . . . . . . . . . . . . . . . .  23

12. RIGHT OF ENTRY AND QUIET ENJOYMENT . . . . . . . . . . . . . . . . .  23
      12.1.   Right Of Entry . . . . . . . . . . . . . . . . . . . . . .  23
      12.2.   Quiet Enjoyment. . . . . . . . . . . . . . . . . . . . . .  23

13. CASUALTY AND TAKING. . . . . . . . . . . . . . . . . . . . . . . . .  23
      13.1.   Termination Or Reconstruction. . . . . . . . . . . . . . .  23
      13.2.   Tenant's Rights. . . . . . . . . . . . . . . . . . . . . .  24
      13.3.   Lease To Remain In Effect. . . . . . . . . . . . . . . . .  25
      13.4.   Reservation Of Compensation. . . . . . . . . . . . . . . .  25
      13.5.   Restoration Of Fixtures. . . . . . . . . . . . . . . . . .  25

14. DEFAULT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
      14.1.   Events Of Default. . . . . . . . . . . . . . . . . . . . .  25
              (a)  Abandonment . . . . . . . . . . . . . . . . . . . . .  25
              (b)  Nonpayment. . . . . . . . . . . . . . . . . . . . . .  25
              (c)  Other Obligations . . . . . . . . . . . . . . . . . .  26
              (d)  General Assignment. . . . . . . . . . . . . . . . . .  26
              (e)  Bankruptcy. . . . . . . . . . . . . . . . . . . . . .  26
              (f)  Receivership. . . . . . . . . . . . . . . . . . . . .  26
              (g)  Attachment. . . . . . . . . . . . . . . . . . . . . .  26
              (h)  Insolvency. . . . . . . . . . . . . . . . . . . . . .  26
              (i)  Cross-Default . . . . . . . . . . . . . . . . . . . .  26
      14.2.   Remedies Upon Tenant's Default . . . . . . . . . . . . . .  26
      14.3.   Remedies Cumulative. . . . . . . . . . . . . . . . . . . .  27

15. SUBORDINATION, ATTORNMENT AND SALE . . . . . . . . . . . . . . . . .  27
      15.1.   Subordination To Mortgage. . . . . . . . . . . . . . . . .  27
      15.2.   Sale Of Landlord's Interest. . . . . . . . . . . . . . . .  28
      15.3.   Estoppel Certificates. . . . . . . . . . . . . . . . . . .  28
      15.4.   Subordination to CC&R's. . . . . . . . . . . . . . . . . .  29

16. SECURITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
      16.1.   Deposit. . . . . . . . . . . . . . . . . . . . . . . . . .  29





                                                                   
17. MISCELLANEOUS. . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
      17.1.   Notices. . . . . . . . . . . . . . . . . . . . . . . . . .  29
      17.2.   Successors And Assigns . . . . . . . . . . . . . . . . . .  30
      17.3.   No Waiver. . . . . . . . . . . . . . . . . . . . . . . . .  30
      17.4.   Severability . . . . . . . . . . . . . . . . . . . . . . .  30
      17.5.   Litigation Between Parties . . . . . . . . . . . . . . . .  30
      17.6.   Surrender. . . . . . . . . . . . . . . . . . . . . . . . .  30
      17.7.   Interpretation . . . . . . . . . . . . . . . . . . . . . .  30
      17.8.   Entire Agreement . . . . . . . . . . . . . . . . . . . . .  31
      17.9.   Governing Law. . . . . . . . . . . . . . . . . . . . . . .  31
      17.10.  No Partnership . . . . . . . . . . . . . . . . . . . . . .  31
      17.11.  Financial Information. . . . . . . . . . . . . . . . . . .  31
      17.12.  [Omitted]. . . . . . . . . . . . . . . . . . . . . . . . .  31
      17.13.  Time . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
      17.14.  Rules and Regulations. . . . . . . . . . . . . . . . . . .  31
      17.15.  Brokers. . . . . . . . . . . . . . . . . . . . . . . . . .  31
      17.16.  Memorandum Of Lease. . . . . . . . . . . . . . . . . . . .  32
      17.17.  Corporate Authority. . . . . . . . . . . . . . . . . . . .  32
      17.18.  Execution and Delivery . . . . . . . . . . . . . . . . . .  32
      17.19.  [Omitted]. . . . . . . . . . . . . . . . . . . . . . . . .  32
      17.20.  Survival . . . . . . . . . . . . . . . . . . . . . . . . .  32
      17.21.  Consents . . . . . . . . . . . . . . . . . . . . . . . . .  32
      17.22.  Landlord Defaults. . . . . . . . . . . . . . . . . . . . .  32



                                      EXHIBITS

EXHIBIT A     Real Property Description

EXHIBIT B     Site Plan

EXHIBIT C     Construction
              C-1: Building Shell Specifications

EXHIBIT D     Acknowledgement of Lease Commencement



                            BUILD-TO-SUIT LEASE

     THIS BUILD-TO-SUIT LEASE ("Lease") is made and entered into as of the 
____day of January, 1998, by and between BRITANNIA HACIENDA V LIMITED 
PARTNERSHIP, a Delaware limited partnership (hereinafter called "Landlord") 
and PROBUSINESS SERVICES, INC., a Delaware corporation (hereinafter called 
"Tenant").

                         THE PARTIES AGREE AS FOLLOWS:

                                 1. PREMISES

     1.1.     PREMISES.

              (a)  Landlord leases to Tenant and Tenant hires and leases from
Landlord, on the terms, covenants and conditions hereinafter set forth,
the premises (the "Premises") consisting of a one-story concrete tilt-up
building of approximately 70,425 square feet, plus or minus 3,500 square feet
(the "Building") to be constructed by Landlord pursuant to the terms of this
Lease on a portion of the real property described in EXHIBIT A attached
hereto (the "Property"). The approximate location of the Building on the
Property and the approximate layout of the other site improvements
constructed or to be constructed by Landlord on the Property are
depicted in the site plan attached hereto as EXHIBIT B (the "Site Plan").
The parking areas, driveways, sidewalks, landscaped areas and other
portions of the Property that lie outside the exterior walls of the
Building (excluding any additional buildings depicted on the Site Plan
or otherwise constructed on the Property by Landlord from time to time),
as depicted on the Site Plan and as hereafter modified by Landlord from
time to time in accordance with the provisions of this Lease, are
sometimes referred to herein as the "Common Areas."

              (b)  As an appurtenance to Tenant's leasing of the Premises 
pursuant to Section 1.1(a), Landlord hereby grants to Tenant, for the benefit 
of Tenant and its employees, suppliers, shippers, customers and invitees, 
during the term of this Lease, the non-exclusive right to use, in common with 
others entitled to such use, the Common Areas (as they exist from time to 
time) and all easements, access rights and similar rights and privileges 
relating to or appurtenant to the Property and created or existing from time 
to time under any easement agreements, declarations of covenants, conditions 
and restrictions, or other written agreements now or hereafter of record with 
respect to the Property, subject however to any limitations applicable to 
such rights and privileges under applicable law and/or under the written 
agreements creating such rights and privileges. Landlord agrees that parking 
in the Common Areas of the Property shall be provided at a minimum ratio of 
at least 3.8 parking spaces for each 1,000 square feet of buildings existing 
on the Property from time to time.

     1.2.     LANDLORD'S RESERVED RIGHTS. Landlord reserves, in addition to 
the right of entry set forth in Section 12.1 hereof, the following rights, 
exercisable from time to time in Landlord's discretion: (i) to install, use, 
maintain, repair and replace pipes, ducts, conduits, wires and appurtenant 
meters and other equipment above the ceiling surfaces, below the floor 
surfaces or within the walls of the Building in locations which will not 
materially interfere with Tenant's use thereof; (ii) to relocate any pipes, 
ducts, conduits, wires and appurtenant meters and equipment located within or 
outside the Building; (iii) to construct, alter or add to other buildings or 
improvements on the Property; (iv) to build adjoining to the Property; (v) to 
lease any part of the Property for the construction of improvements or 
buildings; (vi) to make changes to the Common Areas, including (but not 
limited to) changes in the location, size or shape of any portion of the 
Common Areas, and to relocate parking spaces on the Property; (vii) to close 
temporarily any of the Common Areas for maintenance or other reasonable 
purposes, provided that reasonable parking and reasonable access to the 
Building remain available; (viii) to use the Common Areas while engaged in 
making additional improvements, repairs or alterations to the Property or 
any portion thereof; and (ix) to do and perform such other acts with respect 
to the Common Areas and the Property as may be necessary or appropriate; 
PROVIDED, however, that the exercise by Landlord of its rights under this 
Section 1.2 shall not, without Tenant's prior written consent, (x) materially 
reduce the parking ratio for the Property below that shown on the Site Plan, 
nor (y)
                                     -1-


reduce the number of parking spaces on the portion of the Property designated 
as Phase VII on the Site Plan (other than on a temporary basis incidental to 
construction or maintenance activities of Landlord on the Property, in which 
event Landlord shall exercise reasonable efforts to minimize the number of 
parking spaces affected by such temporary activities), nor (z) make any other 
change in the Site Plan that would have a material adverse effect on Tenant's 
use of the Premises. Moreover, Landlord shall not exercise rights reserved to 
it pursuant to this Section 1.2 in such a manner as to materially impair 
Tenant's ability to conduct its activities in the normal manner, or in such a
manner as to cause any material diminution of Tenant's rights or any material
increase in Tenant's obligations under this Lease; PROVIDED, however, that the
foregoing shall not limit or restrict Landlord's right to undertake reasonable
construction activity and Tenant's use of the Premises shall be subject to 
reasonable temporary disruption incidental to such activity diligently 
prosecuted.

     1.3      FIRST REFUSAL RIGHT (LEASING).

              (a)  During the term of this Lease (including any duly exercised 
extended terms), Landlord shall not lease any space in any building(s) existing
or to be built from time to time on the portion of the Property designated as
Phase V on the Site Plan, except in compliance with this Section 1.3; PROVIDED,
however, that the foregoing restrictions shall not apply during any period in 
which Tenant is in default under this Lease in any material respect.

              (b)  If Landlord intends, during any applicable period 
described in Section 1.3(a), to lease any space in any of the buildings 
existing or to be built on Phase V of the Property from time to time, and if 
Tenant is not then in default under this Lease in any material respect, 
Landlord shall give written notice of such intention to Tenant, specifying 
the material terms on which Landlord proposes to lease such space (the 
"Offered Space"), and shall offer to Tenant the opportunity to lease the 
Offered Space on the terms specified in Landlord's notice. Landlord shall not 
need to have a bona fide written offer from a prospective tenant in order to 
give such a notice, and such notice may, in Landlord's discretion, identify a 
range of sizes, durations, rental rates, tenant improvement allowances and 
other material terms on which Landlord is willing to lease the Offered Space. 
Tenant shall have ten (10) business days after receipt of such notice from 
Landlord in which to accept such offer by written notice to Landlord; if 
Landlord's notice designated alternative terms or a range of terms, Tenant's 
acceptance shall specify which alternative, within the offered range, is 
being accepted by Tenant. Upon such acceptance by Tenant, the Offered Space 
(or applicable portion thereof) shall be leased to Tenant on the terms set 
forth in Landlord's notice and elected by Tenant (subject to the provisions 
of Section 1.3(c)) and on the additional terms and provisions set forth 
herein (except to the extent inconsistent with the terms set forth in 
Landlord's said notice) and the parties shall promptly execute an amendment 
to this Lease adding the Offered Space to the Premises and making any 
appropriate amendments to provisions of this Lease to reflect different rent 
and other obligations applicable to the Offered Space under the terms of 
Landlord's said notice and Tenant's acceptance. If Tenant does not accept 
Landlord's offer within the allotted time, Landlord shall thereafter have the 
right to lease the Offered Space or any portion thereof to a third party, at 
any time within one hundred eighty (180) days after Tenant's failure to 
accept Landlord's offer, at a minimum rental and on other terms and conditions
not more favorable to the lessee than the minimum rental and other terms
offered to Tenant in Landlord's said notice. If Tenant does not accept
Landlord's offer, then to the extent Landlord does not lease the Offered 
Space to a third party within such 180-day period, Landlord shall again be 
required to comply with the provisions of this Section 1.3 prior to any 
further leasing of the Offered Space or any portion thereof.

              (c)  Notwithstanding any other provisions of this Section 1.3, 
if the terms (or range of terms) offered by Landlord to Tenant with respect 
to the Offered Space do not include an expiration date which is coterminous 
with the then current term of this Lease, then Tenant's acceptance (if any) 
of Landlord's offer may take any of the following three forms: (i) Tenant may 
accept the terms (or an alternative within the range of terms, if applicable) 
offered by Landlord, without regard to the non-coterminous nature of the 
respective lease terms for the Offered Space and for the initial Premises 
hereunder; or (ii) Tenant may accept the terms (or an alternative within the 
range of terms, if applicable) offered by Landlord with respect to the 
Offered Space and concurrently extend the then current term of this Lease 
with respect to the initial Premises to terminate concurrently with the lease 
term for the Offered Space, in which event such extension by Tenant shall be 
deemed to be a permissible early exercise of the

                                  -2-


extension option set forth in Section 2.7 hereof, without regard to the time 
limits set forth therein, and the rent for the initial Premises for such 
extended term shall be determined in accordance with Section 3.1(e) hereof 
for any portion of such extended term falling within the first five (5) years 
after the original expiration date of this Lease, and shall be determined in 
accordance with Section 3.1(f) hereof for any portion of such extended term 
falling more than five (5) years after the original expiration date of this 
Lease; or (iii) Tenant may elect to lease the Offered Space for a term 
coterminous with the then remaining term of this Lease with respect to the 
initial Premises, in which event (x) Landlord shall have no obligation to 
improve the Offered Space or provide any tenant improvement allowance for the 
Offered Space, regardless of any contrary terms set forth in Landlord's 
original notice to Tenant, (y) the "minimum rent" for the Offered Space shall 
be the fair market rental value thereof, in the then existing condition of 
such space, which fair market rental value shall be determined promptly in
accordance with the procedure described in Section 3.1 (e) hereof (but at
100% of fair market rental value rather than 95%), and (z) Tenant's lease
of the Offered Space shall otherwise be on the terms set forth in
Landlord's notice and on the additional terms and provisions set
forth herein (except to the extent inconsistent with the terms set
forth in Landlord's said notice).

              (d)  To the extent Tenant elects, pursuant to clause (ii) of 
Section 1.3(c) hereof, an early exercise of one or both extended terms under 
Section 2.7 hereof in whole or in part, then (A) the determination of the rent 
for the initial Premises for the applicable extended term (or portion 
thereof) shall be made during the period commencing six (6) months before the 
commencement of the applicable extended term, pursuant to the procedure in 
Section 3.1(e) or 3.1(f) hereof, as applicable, and (B) to the extent 
Tenant has exercised its option as to only a portion of either extended term,
then the unexercised portion of such extended term shall be deemed to remain 
subject to a continuing extension option by Tenant, which remaining option
shall be exercisable in accordance with Section 2.7 hereof not more than
eight (8) months and not less than six (6) months prior to the expiration
of the initial portion of such extended term already elected by Tenant under
clause (ii) of Section 1.3(c) hereof.

              (e)  Landlord and Tenant acknowledge that a first refusal right 
with respect to Phase V of the Property, substantially identical in its terms 
to subsections (a) through (d) of this Section 1.3 as they apply to Phase V of 
the Property, is contained in subsections (a) through (d) of Section 1.3 of 
the Build-to-Suit Lease dated as of September 27, 1996 between Landlord and 
Tenant (then known as ProBusiness, Inc., a California corporation) with 
respect to Phase VI of the Property as designated on the Site Plan (the 
"Phase VI Lease"), except that such first refusal right under the Phase VI 
Lease is presently effective and shall terminate if and when Tenant gives 
written notice to Landlord that Tenant is releasing and renouncing all 
further rights under Section 1.3 of the Phase VI Lease with respect to 
Phase V of the Property. The provisions of this Section 1.3 of this Lease 
shall be of no force or effect unless and until Tenant gives such a written 
notice to Landlord under the Phase VI Lease, and shall become effective only 
upon the effective date of such written notice, after which Tenant's first 
refusal rights with respect to Phase V of the Property shall be determined
solely under this Section 1.3 and not under Section 1.3 of the Phase VI Lease.
Such notice may be given by Tenant to Landlord at any time and, without limiting
the generality of the foregoing, may be given concurrently with Tenant's
acceptance of Landlord's offer under Section 1.3 of this Lease or under
Section 1.3 of the Phase VI Lease, as applicable.

     1.4      FIRST REFUSAL RIGHT (PURCHASE).

              (a)  During the term of this Lease (including any duly 
exercised extended terms), Landlord shall not sell any building(s) existing 
from time to time on the Property, except in compliance with this Section 
1.4; PROVIDED, however, that the foregoing restrictions shall not apply during 
any period in which Tenant is in default under this Lease in any material 
respect.

              (b)  If Landlord intends, during any applicable period 
described in Section 1.4(a), to sell any of the buildings existing on the 
Property from time to time (including, but not limited to, any such proposed 
sale which also includes, as part of a single bulk transaction with a single 
purchaser or group of purchasers, other buildings or properties 
owned by Landlord or by affiliates of Landlord and located in Pleasanton, 
California), and if Tenant is not then in default under this Lease in any 
material respect, Landlord shall give written notice of such intention to 
Tenant, specifying the material terms on which Landlord proposes to sell such

                                 -3-


buildings and properties (including, but not limited to, any such other 
buildings or properties owned by Landlord or by affiliates of Landlord in 
Pleasanton, California, if applicable) (collectively, the "Offered 
Building(s)"), and shall offer to Tenant the opportunity to purchase the 
Offered Building(s) on the terms specified in Landlord's notice. Landlord 
shall not need to have a bona fide written offer from a prospective purchaser 
in order to give such a notice, and such notice may, in Landlord's 
discretion, identify a range of material terms on which Landlord is willing 
to sell the Offered Building(s). Tenant shall have ten (10) business days after 
receipt of such notice from Landlord in which to accept such offer by written 
notice to Landlord; if Landlord's notice designated alternative terms or a 
range of terms, Tenant's acceptance shall specify which alternative, within 
the offered range, is being accepted by Tenant. Upon such acceptance by 
Tenant, the Offered Building(s) shall be sold to Tenant on the terms set 
forth in Landlord's notice and elected by Tenant and on the additional terms 
and provisions set forth herein (except to the extent inconsistent with the 
terms set forth in Landlord's said notice) and the parties shall promptly 
execute a purchase and sale agreement reflecting such terms and such other 
terms as may reasonably and customarily apply to such a purchase and sale 
transaction. If Tenant does not accept Landlord's offer within the allotted 
time, Landlord shall thereafter have the right to sell the Offered 
Building(s) to a third party, at any time within one (1) year after Tenant's 
failure to accept Landlord's offer, at a price and on other terms and 
conditions not more favorable to the purchaser than the price and other terms 
offered to Tenant in Landlord's said notice. If Tenant does not accept 
Landlord's offer, then to the extent Landlord does not sell the Offered 
Building(s) to a third party within such one-year period, Landlord shall 
again be required to comply with the provisions of this Section 1.4 prior to 
any further sale of the Offered Building(s) or any portion thereof.

              (c)  Notwithstanding any other provisions of this Section 1.4, 
(i) Tenant's first refusal right shall not apply to any proposed transaction 
in which Landlord and its affiliates are selling or proposing to sell, in a 
single bulk transaction to a single purchaser or group of purchasers, not 
only the Property but also at least one additional property out of their real 
estate portfolio holdings NOT located in Pleasanton, California, and (ii) if 
Landlord's offer to Tenant under this Section 1.4 includes more than one 
building on the Property or includes one or more other buildings or 
properties in Pleasanton, California (I.E., buildings or properties other 
than the Property and the buildings thereon) which are owned by Landlord or 
its affiliates and which Landlord and its affiliates propose to sell in a 
single bulk transaction to a single purchaser or group of purchasers 
(recognizing that an offer or proposed sale of fewer than all the buildings 
on the Property can occur only if the Property is legally subdivided, since 
the entire Property is now a single legal parcel), Tenant's sole choice shall 
be to take all or none of the offered buildings and properties, and Tenant 
shall have no right to take some but not all of the offered buildings and 
properties (PROVIDED, however, that if Tenant declines such an offer and 
Landlord thereafter wishes to sell to a third party fewer than all of the 
buildings and properties offered to Tenant in Landlord's initial notice, 
Landlord shall be required, in accordance with the terms of this Section 1.4, 
to give a new notice to Tenant reflecting the changed identification of 
buildings and properties and any other changed terms in such revised 
proposal).

              (d)  Landlord and Tenant acknowledge that a first refusal to 
purchase the buildings on the Property, substantially identical in its terms 
to subsections (a) through (c) of this Section 1.4, is contained in 
subsections (a) through (c) of Section 1.4 of the Phase VI Lease; except that 
such first refusal right under the Phase VI Lease is presently effective and 
shall terminate if and when Tenant gives written notice to Landlord that 
Tenant is releasing and renouncing all further rights under Section 1.4 of 
the Phase VI Lease. The provisions of this Section 1.4 of this Lease shall be 
of no force or effect unless and until Tenant gives such a written notice to 
Landlord under the Phase VI Lease, and shall become effective only upon the 
effective date of such written notice, after which Tenant's first refusal 
purchase rights with respect to the buildings on the Property shall be 
determined solely under this Section 1.4 and not under Section 1.4 of the 
Phase VI Lease. Such notice may be given by Tenant to Landlord at any time 
and, without limiting the generality of the foregoing, may be given 
concurrently with Tenant's acceptance of Landlord's offer under Section 1.4 
of this Lease or under Section 1.4 of the Phase VI Lease, as applicable.


                                      -4-


                                    2. TERM

              2.1. TERM.  The term of this Lease shall commence on the earlier 
to occur of (i) the date which is five (5) days after the date Landlord 
notifies Tenant that Landlord's work pursuant to Section 2.4 and EXHIBIT C on 
the Building shell and core and on the first phase (at least 35,000 square feet)
of interior improvements is substantially complete and such work is in fact 
substantially complete (but in no event earlier than July 1, 1999), or (ii) the 
date Tenant takes occupancy of the Premises (except as otherwise provided in 
Section 2.2), the earlier of such dates being herein called the "Commencement 
Date," and shall end on the day immediately preceding the date eleven (11) 
years thereafter, unless sooner terminated or extended as hereinafter provided. 
Assuming execution of this Lease by December 1, 1997 and approval of full plans,
specifications and working drawings by July 1, 1998, the parties presently 
estimate that the Commencement Date will be no later than July 1, 1999. For 
purposes of this Section 2.1, Landlord's work shall be deemed to be 
"substantially complete" when all of the following have occurred: (A) all 
improvements to be constructed by Landlord as part of the Building shell and 
core and the first phase (at least 35,000 square feet) of interior improvements,
pursuant to EXHIBIT C have been completed except for "punch list" items which 
do not materially interfere with Tenant's ability to utilize the first phase 
(at least 35,000 square feet) of the Premises for their intended purpose; 
(B) the City of Pleasanton has issued a certificate of occupancy for the first 
phase (at least 35,000 square feet) of the Premises; (C) all utilities 
reasonably necessary for Tenant's use of the first phase (at least 35,000 
square feet) of the Premises for their intended purpose are connected and 
available for use at the Premises; and (D) all improvements to be constructed 
by Landlord as part of the Common Areas contemplated for and located on 
Phase VII of the Property as shown on the Site Plan have been completed, except 
for "punch list" items which do not materially interfere with Tenant's ability 
to utilize the Premises for their intended purpose, and are available for use 
by Tenant.

              2.2. EARLY POSSESSION.  If Landlord permits Tenant to occupy, 
use or take possession of the Premises prior to the Commencement Date 
determined under Section 2.1, such occupancy, use or possession shall be 
subject to and upon all of the terms and conditions of this Lease, including 
the obligation to pay rent and other charges, unless Landlord and Tenant 
agree otherwise; PROVIDED, however, that such early possession shall not 
advance or otherwise affect the Commencement Date or termination date 
determined under Section 2.1; PROVIDED FURTHER, that if Tenant takes such 
early possession solely for the purpose of installing fixtures, equipment, 
furniture and furnishings and other similar work preparatory to the 
commencement of business in the Premises (which early possession Landlord 
shall be required to offer to Tenant at least three (3) weeks prior to the 
estimated date for substantial completion of Landlord's work as contemplated 
in Section 2.1 hereof), Tenant shall not be required to pay rent or Operating 
Expenses by reason of such possession until the Commencement Date otherwise 
occurs; and PROVIDED FURTHER, that Tenant shall not interfere with or delay 
Landlord's contractors by such early possession and shall indemnify, defend 
and hold harmless Landlord and its agents and employees from and against any 
and all claims, demands, liabilities, actions, losses, costs and expenses, 
including (but not limited to) reasonable attorneys' fees, arising out of or 
in connection with Tenant's early entry upon the Premises hereunder.

              2.3. DELAY IN POSSESSION.  Landlord agrees to use its best 
reasonable efforts to pursue and complete the work described in Section 2.4 
and EXHIBIT C promptly, diligently, and within the respective time periods set 
forth in a construction timeline to be mutually agreed upon by Landlord and 
Tenant following final approval of plans and specifications pursuant to 
EXHIBIT C, as such timeline may be modified from time to time by mutual 
agreement of Landlord and Tenant, and subject to the effects of any delays 
caused by or attributable to Tenant or any other circumstances beyond 
Landlord's reasonable control (excluding any financial inability); PROVIDED, 
however, that except to the extent caused by a material default by Landlord of 
its obligations set forth in this Lease (including, but not limited to, its 
obligations set forth in this Section 2.3 and in Section 2.4 and EXHIBIT C), 
Landlord shall not be liable for any damages caused by any delay in the 
completion of such work, nor shall any such delay affect the validity of this 
Lease or the obligations of Tenant hereunder.


                                      -5-

              2.4. CONSTRUCTION.

                   (a) The obligation of Landlord to construct and improve the 
Premises for occupancy by Tenant hereunder, and to construct related site 
improvements in the Common Areas for use by Tenant, is set forth in EXHIBIT C 
attached hereto and incorporated herein by this reference. Except as set 
forth in this Section 2.4 and in EXHIBIT C, Landlord shall have no 
responsibilities or obligations with respect to preparation of the Premises 
or the Property for Tenant's occupancy of the Premises under this Lease.

                   (b) Landlord shall deliver the Building core and shell and 
first phase (at least 35,000 square feet) of interior improvements in the 
Building to Tenant clean and free of debris on the Commencement Date (subject 
to Tenant's right of early possession stated in the second proviso in 
Section 2.2), and Landlord warrants to Tenant, effective as of the 
Commencement Date, that (i) the Building core and shell and first phase (at 
least 35,000 square feet) of interior improvements therein and the Common 
Areas contemplated for or located on Phase VII of the Property as designated 
on the Site Plan are substantially completed and are free from material 
defects in design and construction, (ii) the electrical, mechanical, 
plumbing, lighting, air conditioning and heating systems, and the loading 
doors, if any, on the Building are in good operating condition (to the extent 
necessary to serve the first phase of at least 35,000 square feet of interior 
improvements) and are free of material defects in design, equipment and/or 
installation, and (iii) the Building core and shell and first phase (at least 
35,000 square feet) of interior improvements therein have been constructed in 
compliance in all material respects with the plans and specifications 
developed and approved pursuant to EXHIBIT C. If it is determined that this 
warranty has been violated in any respect, then it shall be the obligation of 
Landlord, after receipt of written notice from Tenant setting forth with 
specificity the nature of the violation, to promptly, at Landlord's sole 
cost, correct the condition(s) constituting such violation. Tenant's failure 
to give such written notice to Landlord within ninety (90) days after the 
Commencement Date shall give rise to a conclusive presumption that Landlord 
has complied with all Landlord's obligations under this Section 2.4 and 
EXHIBIT C, except with respect to latent defects.

                   (c) Landlord warrants to Tenant that the Building core and 
shell and first phase (at least 35,000 square feet) of interior improvements 
constructed by Landlord therein, as they exist on the Commencement Date, but 
without regard to any use for which Tenant will occupy the Premises other than
general office use, shall not violate any covenants or restrictions of record 
or any applicable building code, regulation or ordinance in effect on the 
Commencement Date. If it is determined that this warranty has been violated,
then it shall be the obligation of Landlord, after written notice from Tenant,
to promptly, at Landlord's sole cost and expense, correct the condition(s) 
constituting such violation. Tenant acknowledges that neither Landlord nor any
agent of Landlord has made any representation or warranty as to the present or
future suitability of the Premises for the conduct of Tenant's business or 
proposed business thereon, except as expressly set forth in this Lease.

                   (d) Landlord's obligations, representations and warranties 
with respect to the second phase (35,425 square feet or less) of interior 
improvements in the Premises shall be identical to the obligations, 
representations and warranties set forth in this Section 2.4 and in EXHIBIT C 
with respect to the first phase of interior improvements, but shall be deemed 
to be made as of the date on which Landlord's construction of such second phase
of interior improvements is substantially complete (as defined in Section 2.1).

                   (e) TENANT ACKNOWLEDGES THAT THE FOREGOING WARRANTIES ARE 
IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THE 
PHYSICAL CONDITION OF THE BUILDING AND IMPROVEMENTS TO BE CONSTRUCTED BY 
LANDLORD AND THAT LANDLORD MAKES NO OTHER WARRANTIES EXCEPT AS EXPRESSLY SET 
FORTH IN THIS LEASE.

              2.5.  ACKNOWLEDGEMENT OF LEASE COMMENCEMENT.  Upon commencement 
of the term of this Lease, Landlord and Tenant shall execute a written 
acknowledgement of the Commencement Date, date of termination, square footage 
of the Premises and of the first phase of interior improvements delivered to 
Tenant, excess cost of improvements (if applicable) and related matters, 
substantially in the form attached hereto as EXHIBIT D (with appropriate 
insertions), which acknowledgement shall be deemed to be incorporated herein 
by this reference.
                                      -6-

Notwithstanding the foregoing requirement, the failure of Tenant to execute 
such a written acknowledgement shall not affect Landlord's determination of 
the Commencement Date, date of termination, square footage of the Premises 
and of the first phase of interior improvements delivered to Tenant, excess 
cost of improvements (if applicable) and related matters in accordance with 
the provisions of this Lease.

     2.6. HOLDING OVER. If Tenant holds possession of the Premises after the 
term of this Lease with Landlord's written consent, then except as 
otherwise specified in such consent, Tenant shall become a tenant from month 
to month at one hundred twenty-five percent (125%) of the rental and 
otherwise upon the terms herein specified for the period immediately prior to 
such holding over and shall continue in such status until the tenancy is 
terminated by either party upon not less than thirty (30) days prior written 
notice. If Tenant holds possession of the Premises after the term of this 
Lease without Landlord's written consent, then Landlord in its sole 
discretion may elect (by written notice to Tenant) to have Tenant become a 
tenant either from month to month or at will, at one hundred twenty-five 
percent (125%) of the rental (prorated on a daily basis for an at-will 
tenancy, if applicable) and otherwise upon the terms herein specified for the 
period immediately prior to such holding over, or may elect to pursue any and 
all legal remedies available to Landlord under applicable law with respect to 
such unconsented holding over by Tenant. Tenant shall indemnify and hold 
Landlord harmless from andy loss, damage, claim, liability, cost or expense 
(including reasonable attorneys' fees) resulting from any delay by Tenant in 
surrendering the Premises (except with Landlord's prior written consent), 
including but not limited to any claims made by a succeeding tenant by reason 
of such delay. Acceptance of rent by Landlord following expiration or 
termination of this Lease shall not constitute a renewal of this Lease.

     2.7. OPTION TO EXTEND TERM. Tenant shall have the option to extend the 
term of this Lease, at the minimum rental set forth in Section 3.1(e) and (f) 
and otherwise upon all the terms and provisions set forth herein with respect
to the initial term of this Lease, for up to two (2) additional periods of 
five (5) years each, commencing upon expiration of the initial term hereof. 
Exercise of such option with respect to the first such extended term shall be 
by written notice to Landlord at lease six (6) months and not more than eight 
(8) months prior to the expiration of the initial term hereof; exercise of 
such option with respect to the second such extended term, if the first 
extension options has been duly exercised, shall be by like written notice to 
Landlord at least six (6) months and not more than eight (8) months prior to 
the expiration of the first extended term hereof. If there exists a material 
event of default on the part of Tenant on the date of any such notice, then 
the notice shall not be effective. If Tenant properly exercises one or more 
extension options under this Section, then all references in this Lease 
(other than in this Section 2.7) to the "term" of this Lease shall be 
construed to include the extension term(s) thus elected by Tenant.  Except as 
expressly set forth in this Section 2.7, Tenant shall have no right to extend 
the term of this Lease beyond its prescribed term.  To the extent provided in 
Section 1.3(c)(ii) and 1.3(d), Tenant may elect an early and/or partial 
exercise of one or both extended terms in connection with an acceptance of 
Offered Space; in the event of any such partial exercise, the remaining 
unexercised portion of the extended term(s) shall be subject to a continuing 
option under this Section 2.7, as provided in Section 1.3(d), and upon a 
proper exercise by Tenant of such remaining extended term(s), the rent for 
such remainder of the extended term(s) shall be determined, as of the 
commencement of such remainder of the extended terms(s), in the manner 
provided in Section 3.1(e) or 3.1(f), as applicable.

                                    3. RENTAL

              3.1. MINIMUM RENTAL.

                   (a)  Tenant shall pay to Landlord as minimum rental for 
the Premises, in advance, without deduction, offset, notice or demand, on or 
before the Commencement Date and on or before the first day of each 
subsequent calendar month of the term of this Lease, the following amounts 
per month: for months 1-12, the sum of $43,750.00 per month; and for months 
13-132, the adjusted rent determined under Section 3.1(b) hereof.  
Notwithstanding the foregoing provisions of this Section 3.1, however, at any 
time after month 12 of the term of this Lease, Tenant in its sole discretion 
may elect, by written notice to Landlord, to convert its

                                    -7-

minimum rental obligation for the period from the date of such notice through 
the remainder of the initial term of this Lease to the following amounts per 
month (as applicable):



                     Months After           Minimum Rental
                  Commencement Date           (per month)
                  -----------------         --------------
                                         
                        13-24                $ 91,000.00
                        25-36                  94,640.00
                        37-48                  98,426.00
                        49-60                 102,363.00
                        61-72                 106,458.00
                        73-84                 110,716.00
                        85-96                 115,145.00
                        97-108                119,751.00
                       109-120                124,541.00
                       121-132                129,523.00


If the obligation to pay minimum rental hereunder commences on other than the 
first day of a calendar month or if the term of this Lease terminates on 
other than the last day of a calendar month, the minimum rental for such 
first or last month of the term of this Lease, as the case may be, shall be 
prorated based on the number of days the term of this Lease is in effect 
during such month. If an increase in minimum rental becomes effective on a 
day other than the first day of a calendar month, the minimum rental for that 
month shall be the sum of the two applicable rates, each prorated for the 
portion of the month during which such rate is in effect.

              (b)  If and only if Tenant does not exercise its election under 
Section 3.1(a) to convert its minimum rental obligation to the rent schedule 
set forth in Section 3.1(a), then and only then shall the minimum rental 
hereunder be subject to adjustment as set forth in this Section 3.1(b). To 
the extent Tenant does not exercise such election as of the end of month 12 
of the term of this Lease, then for so long as such election remains 
unexercised, minimum rental hereunder shall be subject to adjustment on the 
first anniversary of the Commencement Date, effective for months 13-24 of the 
term of this Lease, and on each subsequent anniversary of the Commencement 
Date until the expiration of the initial term of this Lease, effective for 
the succeeding twelve (12) months of the term of this Lease (each such 
anniversary being herein called an "Adjustment Date"), in accordance with the 
provisions of this paragraph (b). The base for computing such adjustment 
shall be (i) for the first such adjustment, the Consumer Price Index for All 
Urban Consumers, San Francisco/Oakland/San Jose Metropolitan Area, All Items 
(1982-84 = 100), produced by the United States Department of Labor, Bureau of 
Labor Statistics ("Index") which is published for the month two (2) months 
prior to the month in which the Commencement Date occurs and (ii) for each 
subsequent adjustment, the Extension Index (as hereinafter defined) used for 
the immediately preceding adjustment (each such Index identified in clause 
(i) or (ii) of this sentence, as applicable, being hereinafter called the 
"Beginning Index"). If the Index which is published for the month two (2) 
months prior to the month in which the Adjustment Date occurs (the "Extension 
Index") has increased over the Beginning Index, the minimum rental payable 
thereafter shall be increased to an amount equal to the minimum rental in 
effect immediately prior to such Adjustment Date multiplied by the lesser of 
(x) 1.05 or (y) a fraction, the numerator of which is equal to the sum of the 
Beginning Index for such Adjustment Date plus the product of 2.5 times the 
difference between the Extension Index for such Adjustment Date and the 
Beginning Index for such Adjustment Date, and the denominator of which is the 
Beginning Index for such Adjustment Date. If the Extension Index is not 
available until after the Adjustment Date, Tenant shall continue to pay the 
then prevailing minimum rental until the Extension Index is published, 
whereupon the adjustment provided in this paragraph shall be made retroactive 
to the Adjustment Date and any accumulated excess of the adjusted minimum 
rental over the amounts actually paid by Tenant since the Adjustment Date 
shall be paid promptly by Tenant to Landlord upon notice by Landlord to 
Tenant of the adjusted minimum rental. If the Index is changed so that the 
base year differs from the base year used as of the Commencement Date, the 
Index shall be converted in accordance with the conversion factor published 
by the United States Department of Labor, Bureau of Labor Statistics. If the 
Index is discontinued or substantially revised during the term of this Lease, 
any comparable governmental index or computation with which it is replaced 
(or, if none is available, any privately published index which is comparable 
in coverage and purpose) shall be designated by 

                                      -8-

Landlord in order to obtain substantially the same result as would have been 
obtained if the Index had not been discontinued or revised. Upon any 
adjustment of the monthly minimum rental in accordance with the provisions of 
this paragraph, Landlord and Tenant shall immediately execute a written 
acknowledgement of the new minimum rental as adjusted, which acknowledgement 
shall be deemed to be incorporated herein by this reference; PROVIDED, 
however, that any failure of one or both parties to execute and deliver such 
a written acknowledgement shall not limit or affect in any way the other 
obligations of the parties with respect to the applicable rental adjustment 
or any subsequent rental adjustments required under this paragraph (b).

              (c)  The minimum rental amounts specified in this Section 3.1 
are based upon an estimated area of 70,000 square feet for the Premises 
(except during months 1-12, when the estimated area of the Premises is 
assumed to be 35,000 square feet, reflecting the estimated area of the first 
phase of the build-out of interior improvements in the Premises.) If the 
actual area of the Premises, when completed, is greater or less than such 
estimated area (PROVIDED that under no circumstances shall the first phase of
construction of tenant improvements for the Premises be less than 35,000 
square feet), then the minimum rentals specified in Sections 3.1(a) and/or 
(b), as applicable, shall be adjusted for each rental period in strict 
proportion to the ratio between the actual area of the Premises during the 
applicable period (which area shall be certified by Landlord's architect as 
being determined on the basis of measurement from the exterior faces of the 
exterior walls of the Building and from the dripline of any overhangs, and, 
for purposes of determining the amount of space occupied by Tenant during the 
first twelve months of the term of this Lease, shall be measured to the 
centerline of any interior demising walls) and the assumed area of 35,000 or 
70,000 square feet, as applicable. If Tenant occupies more than 35,000 square 
feet of the Premises during any portion of the first twelve months of the 
term of this Lease (due to expansion, at Tenant's request, of the first phase 
of interior improvements, acceleration of Tenant's occupancy of the second 
phase of interior improvements or for any other reason), or if the actual 
area of the first phase of interior improvements is more than 35,000 square 
feet, then the minimum rental specified above for such portion of the first 
twelve months of the term of this Lease shall be adjusted in strict 
proportion to the ratio between the additional space occupied by Tenant in 
excess of 35,000 square feet or the actual area of the first phase of 
interior improvements (but in no event less than 35,000 square feet), as 
applicable, as determined on the basis of measurement set forth in the 
immediately preceding sentence hereof, and the assumed area of 35,000 square 
feet. If Landlord's substantial completion of the second phase of interior 
improvements occurs later than twelve months after the Commencement Date, 
then to the extent such delayed completion results from any cause other than 
delays attributable to acts or omissions of Tenant or its agents, employees 
or contractors, the minimum rentals specified in Sections 3.1(a) and/or (b), 
as applicable, shall be reduced, for the period from the beginning of the 
thirteenth month of the term of this Lease until the substantial completion 
and delivery by Landlord of the second phase of interior improvements, in 
strict proportion to the ratio between (i) the greater of the actual area of 
the space occupied by Tenant in the Premises or the actual area of the first 
phase of interior improvements, as determined in each case on the basis of 
measurement set forth in the second preceding sentence hereof, and (ii) the 
assumed area of 70,000 square feet. Measurements of building area under this 
paragraph shall be made initially by Landlord's architect, subject to review 
and approval by Tenant's architect.

              (d)  The minimum rental amounts specified in Section 3.1(a) do 
not reflect any excess improvement costs that may be chargeable to Tenant in 
accordance with EXHIBIT C. If, upon completion of construction of the 
Premises, it is determined that there are any such excess improvement costs 
chargeable to Tenant in accordance with EXHIBIT C, then Tenant shall pay to 
Landlord as additional minimum rental for the Premises during the initial 
term of this Lease an amount each month equal to the amount necessary to 
amortize such excess improvement costs on a level payment basis over the 
initial term of this Lease with an imputed return at the rate of ten percent 
(10%) per annum. Upon determination of the amount of any additional minimum 
rental in accordance with the provisions of this paragraph, Landlord and 
Tenant shall incorporate such amount in the Acknowledgement of Lease 
Commencement in the form of EXHIBIT E or shall execute a separate written 
acknowledgement of such additional minimum rental, which acknowledgement 
shall be deemed to be incorporated herein by this reference; PROVIDED, 
however, that any failure of one or both parties to execute and deliver 
such a written acknowledgement shall not limit or affect in any way the other 
obligations of the parties with respect to the additional minimum rental (if 
any) due under this paragraph (d). Notwithstanding any other provisions of 
this Section 3.1, any additional minimum rental payable under this paragraph (d)

                                      -9-


shall NOT be subject to adjustment under Section 3.1(a), (b) or (c), 
regardless of any adjustments that may otherwise be appropriate for other 
minimum rental components under such paragraphs (a), (b) or (c).

              (e)  If Tenant properly exercises its right to extend the term 
of this Lease pursuant to Section 2.7 hereof, the minimum rental during the 
first extended term shall be equal to ninety-five percent (95%) of the fair 
market rental value of the Premises (in "as is" condition as theretofore 
improved under Section 2.4 and EXHIBIT C, but without regard to any tenant 
improvement allowance for the extended term and without regard to the value 
of any improvements which were installed by Tenant at its own cost and which 
Tenant has the right to remove from the Premises pursuant to Article 7 hereof 
upon expiration of the Lease), including any cost-of-living adjustments or 
other rental increase provisions then customary in the relevant market for 
comparable commercial leases, determined as of the commencement of such 
extended term in accordance with this paragraph. Upon Landlord's receipt of a 
proper notice of Tenant's exercise of its option to extend the term of this 
Lease, the parties shall have sixty (60) days in which to agree on the fair 
market rental (including any applicable rental increase provisions) for the 
Premises (as theretofore improved under Section 2.4 and EXHIBIT C) at the 
commencement of the first extended term for the uses permitted hereunder. If 
the parties agree on such fair market rental and rental increase provisions 
(if any), they shall execute an amendment to this Lease stating the amount of 
the applicable minimum monthly rental and any applicable rental increase 
provisions. If the parties are unable to agree on such rental (including any 
applicable rental increase provisions) within such sixty (60) day period, 
then within fifteen (15) days after the expiration of such period each party, 
by written notice to the other party, shall appoint a real estate appraiser 
with at least five (5) years experience appraising similar commercial 
properties in the City of Pleasanton or County of Alameda. If either party 
fails to appoint an appraiser within the allotted time, the single appraiser 
appointed by the other party shall be the sole appraiser. If an appraiser is 
appointed by each party, the two appraisers so appointed shall appoint a 
third qualified appraiser within fifteen (15) days after the appointment of 
the later of the two appraisers to be appointed; if the two appraisers are 
unable to agree upon a third appraiser, either party may, upon not less than 
five (5) days notice to the other party, apply to the Presiding Judge of the 
Superior Court for the county in which the Property is located for the 
appointment of a third qualified appraiser. Each party shall bear the fees 
and charges of the appraiser appointed by such party, shall bear its own 
legal fees in connection with appointment of the third appraiser and shall 
bear one-half of any other costs of appointment of the third appraiser and of 
such third appraiser's fee. Each appraiser designated under this paragraph, 
however selected, shall be a person who has not acted for either party (or 
for any person or entity which controls, is controlled by or is under common 
control with either party) in any capacity within five (5) years prior to the 
date of such designation hereunder. Within thirty (30) days after the 
appointment of the third appraiser, a majority of the three appraisers shall 
set the fair market rental and any applicable rental increase provisions for 
the first extended term and shall so notify the parties. If a majority are 
unable to agree within the allotted time, each of the three appraisers at the 
end of such 30-day period shall submit his or her written determination of 
the fair market rental and any applicable rental increase provisions and (i) 
the three appraised fair market rentals shall be added together and divided 
by three and the resulting quotient shall be the fair market rental for the 
first extended term (except that any fair market appraisal that differs by 
more than 10% from the "middle" appraisal shall be disregarded and the 
averaging process shall be adjusted accordingly to reflect only the remaining 
appraisal(s)), and (ii) the applicable rental increase provision (if any) 
shall be equal to the mathematical average (or the nearest reasonable 
approximation thereto) of the two rental increase provisions that are most 
closely comparable, which determinations shall be binding on the parties and 
shall be enforceable in any further proceedings relating to this Lease.

              (f)  If Tenant properly exercises its right to a second 
extended term of this Lease pursuant to Section 2.7 hereof, the minimum 
rental during such second extended term shall be determined in the same 
manner provided in paragraph (e) of this Section for the first extended term, 
except that (i) the determination shall be made as of the commencement of 
the second extended term and (ii) the applicable percentage of fair market 
rental under clause (ii) of the first sentence of paragraph (e) of this 
Section shall be one hundred percent (100%) rather than ninety-five percent 
(95%).


                                      -10-


    3.2.     LATE CHARGE.  If Tenant fails to pay when due rental or other 
amounts due Landlord hereunder, such paid amounts shall bear interest for 
the benefit of Landlord at a rate equal to the lesser of fifteen percent (15%) 
per annum or the maximum rate permitted by law, from the date due to the date 
of payment. In addition to such interest, Tenant shall pay to Landlord a later 
charge in an amount equal to five percent (5%) of any installment of minimum 
rental and any other amounts due Landlord if not paid in full on or before the 
third (3rd) day after written notice from Landlord to Tenant that such rental 
or other amount is past due; PROVIDED, however, that if any payment of rent 
or other amounts by Tenant is more than five (5) days late and Landlord gave 
written notice of delinquency to Tenant prior to such payment, than for the 
next twelve (12) calendar months after such written notice was given, Tenant 
shall be liable for later charges on any further payment of rental or other 
amount that is not paid on or before the fifth (5th) day after such rental or 
other amount is due, WITHOUT any requirement of prior notice from Landlord to 
Tenant of such default or delinquency. Tenant acknowledges that late payment 
by Tenant to Landlord of rental or other amounts due hereunder will cause 
Landlord to incur costs not contemplated by this Lease, including, 
without limitation, processing and accounting charges and late charges which 
may be imposed on Landlord by the terms of any loan relating to the Property. 
Tenant further acknowledges that it is extremely difficult and impractical to 
fix the exact amount of such costs and that the late charge set forth 
in this Section 3.2 represents a fair and reasonable estimate thereof. 
Acceptance of any late charge by Landlord shall not constitute a waiver 
of Tenant's default with respect to overdue rental or other amounts, nor 
shall such acceptance prevent Landlord from exercising any other rights and 
remedies available to it. Acceptance of rent or other payments by Landlord 
shall not constitute a waiver of late charges or interest accrued with 
respect to such rent or other payments or any prior installments thereof, nor 
of any other defaults by Tenant, whether monetary or non-monetary in nature, 
remaining uncured at the time of such acceptance of rent or other payments.

                                   4. TAXES

    4.1      PERSONAL PROPERTY.  Tenant shall be responsible for and shall 
pay prior to delinquency all taxes and assessments levied against or by 
reason of (a) any and all alterations, additions and items installed or 
placed on the Premises and taxed as personal property rather than as real 
property, and (b) all personal property, trade fixtures and other property 
installed or placed by Tenant on or about the Property. Upon request by 
Landlord, Tenant shall furnish Landlord with satisfactory evidence of Tenant's 
payment thereof. If at any time during the term of this Lease any of said 
alterations, additions or personal property, whether or not belonging to 
Tenant, shall be taxed or assessed as part of the Property, then such tax or 
assessment shall be paid by Tenant to Landlord immediately upon presentation 
by Landlord of copies of the tax bills in which such taxes and assessments 
are included and shall, for the purposes of this Lease, be deemed to be 
personal property taxes or assessments under this Section 4.1.

    4.2.     REAL PROPERTY.  To the extent any real property taxes and 
assessments on the Premises, on any improvements therein or on the portion of 
the Property identified as Phase VII in the Site Plan are assessed directly 
to Tenant, Tenant shall be responsible for and shall pay prior to delinquency 
all such taxes and assessments. Upon request by Landlord, Tenant shall 
furnish Landlord with satisfactory evidence of Tenant's payment thereof. To 
the extent the Property, the Premises and/or any improvements there are 
taxed or assessed to Landlord following the Commencement Date, such real 
property taxes and assessments shall constitute Operating Expenses (as that 
term is defined in Section 5.2 of this Lease) and shall be paid in 
accordance with the provisions of Article 5 of this Lease.

    4.3      CHALLENGE TO ASSESSMENT.  Notwithstanding any other provision of 
this Article 4:

             (a)  If Tenant requests by written notice to Landlord that 
Landlord challenge or contest the amount of any real or personal property 
taxes or assessments which are levied generally against Landlord and/or the 
Property and which are relevant to the determination of real or personal 
property taxes for which Tenant is liable under this Article 4 or under 
Article 5 (which notice shall include a specification, with all reasonable 
supporting information, of the basis on which Tenant believes that there is a 
reasonable basis for such challenge or contest), and if Landlord agrees that 
there is a reasonable basis for such challenge or contest, then Landlord

                                      -11-



shall initiate and pursue such a challenge or contest, diligently and with 
commercially reasonable efforts, at Landlord's sole cost and expense (except 
as otherwise provided below and subject to the possible application of the 
provisions of Article 5 hereof with respect to such expense). If Landlord's 
challenge or contest results in a net recovery of any previously paid taxes 
(after Landlord first deducts and retains from any such recovery, as a 
reimbursement to Landlord, the amount of the costs and expenses reasonably 
incurred by Landlord to obtain the recovered amounts, except to the extent 
Landlord has previously elected or then elects, in Landlord's reasonable 
discretion, to treat such expenses as Operation Expenses under Article 5 
hereof), Landlord shall pay such net recovery to Tenant in proportion to the 
extent Tenant initially bore the economic burden of the recovered amounts, 
and shall retain such net recovery in proportion to the extent the economic 
burden of the recovered amounts was initially borne by Landlord or by any 
other tenant other than Tenant.

             (b)  If Landlord fails to challenge or contest any real or 
personal property taxes or assessments following a request by Tenant under 
Section 4.3(a) above, or if Section 4.3(a) is inapplicable because the real 
or personal property taxes or assessments in question are assessed directly 
against Tenant or its property rather than being assessed generally against 
Landlord or the Property, then Tenant shall have the right to challenge or 
contest, at Tenant's sole cost and expense (except as otherwise provided 
below), the amount of any such real or personal property taxes or assessments 
relevant to the determination of real or personal property taxes for which 
Tenant is liable under this Article 4 or under Article 5, PROVIDED that as a 
condition of its exercise of such right, Tenant shall indemnify, defend and 
hold Landlord and the Property harmless from and against any and all fines, 
penalties, late charges, liens, tax sales and other adverse consequences 
arising out of or in connection with such challenge or contest by Tenant or 
arising out of or in connection with the taxes and assessments which are the 
subject thereof, and shall take all steps reasonably necessary and prudent to 
prevent any liens (other than the normal liens for non-delinquent real and 
personal property taxes), tax sales and other enforcement proceedings from 
arising with respect to the Property as a result of Tenant's challenge or 
contest. If Tenant's challenge or contest results in a net recovery of any 
previously paid taxes (after Tenant first deducts and retains from any such 
recovery, as a reimbursement to Tenant, the amount of the costs and expenses 
reasonably incurred by Tenant to obtain the recovered amounts), Tenant shall 
be entitled to retain such net recovery in proportion to the extent Tenant 
initially bore the economic burden of the recovered amounts, and shall pay 
such net recovery over to Landlord in proportion to the extent the economic 
burden of the recovered amounts was initially borne by Landlord or by any 
other tenant other than Tenant.

                             5. OPERATING EXPENSES

    5.1      PAYMENT OF OPERATING EXPENSES.

             (a)  Tenant shall pay to Landlord, at the time and in the manner 
hereinafter set forth, as additional rental, an amount equal to twelve and four
hundredths percent (12.04%) ("Tenant's Building Operating Cost Share") and 
twelve and eighty-eight hundredths percent (12.88%) ("Tenant's Land Operating 
Cost Share"), as applicable, of the Operating Expenses defined in Section 5.2;
PROVIDED, however, that upon substantial completion of the second phase of 
improvements in the Premises (at which time Tenant will occupy the entire 
Building), Tenant's Building Operating Cost Share shall increase to 
twenty-four and eight hundredths percent (24.08%) and Tenant's Land Operating 
Cost Share shall increase to twenty-five and seventy-five hundredths percent 
(25.75%), assuming a final area of 70,000 square feet for the entire Building 
(measured in accordance with Section 3.1(b)). Tenant's Land Operating Cost 
Share shall be applicable in determining Tenant's share of (x) the taxes, 
assessments and other expenses described in clause (iii) of Section 5.2 
(excluding personal property taxes and the portion of real property taxes, 
assessments and similar items allocable to buildings or improvements, as 
opposed to land), and (y) assessments and dues described in clause (vi) of 
Section 5.2 and payable to the Hacienda Business Park Owners' Association or 
otherwise payable under the governing covenants, conditions and restrictions 
for the Hacienda Business Park, including (but not limited to) the Master 
Declaration as defined in Section 15.4 hereof. Tenant's Building Operating 
Cost Share shall be applicable in determining Tenant's share of all other 
Operating Expenses, including (but not limited to), under Section 5.2(iii), 
personal property taxes and the portion of real

                                      -12-



property taxes, assessments and similar items allocable to buildings or 
improvements, as opposed to land.

             (b)  Tenant's Building Operating Cost Share and Land Operating 
Cost Share as specified in paragraph (a) of this Section are based upon an 
estimated area of 35,000 square feet for the Premises (that being the portion 
anticipated to be built out as the first phase of interior improvements and 
occupied by Tenant during the first twelve months of the term) and upon an 
estimated aggregate area of 290,586 square feet for the buildings to be owned 
by Landlord on the Property as of the Commencement Date. If the actual area 
of the first phase of interior improvements or of the entire Building (when 
completed), as determined on the basis of measurement set forth in Section 
3.1(c) hereof, or the gross square footage of any of the other buildings on 
the Property (as determined in good faith by Landlord's architects in 
accordance with whatever basis of measurement is applied by Landlord in good 
faith in determining Operating Expense shares for tenants of such additional 
building pursuant to the terms of their leases), differs from the assumed 
numbers set forth above (PROVIDED that the first phase shall in no event be 
less than 35,000 square feet), or when Tenant occupies more than 35,000 
square feet of the Premises as contemplated in Section 3.1(c) and EXHIBIT C, 
then Tenant's Building Operating Cost Share and Tenant's Land Operating 
Cost Share shall be adjusted to reflect the actual areas so determined and so 
occupied by Tenant.

             (c)  Tenant's Land Operating Cost Share as specified in 
paragraph (a) of this Section is based upon an estimated area of 4.979 acres 
for the portion of the Property designated as Phase VII on the Site Plan and 
a surveyed area of 19.339 acres for the entire Property. If the boundaries of 
the Phase VII land area (which is intended to be the land area reasonably 
allocable to the Building and its users, albeit on a nonexclusive basis) are 
changed at any time by mutual agreement of Landlord and Tenant, or if the 
actual area of Phase VII is determined to be greater or smaller than 4.979 
acres, then Tenant's Land Operating Cost Share shall be adjusted accordingly.

             (d)  If Landlord actually receives (and is not required to pay 
over to The Prudential Insurance Company of America), during the term of this 
Lease, any refund of real property taxes or assessments with respect to the 
Property and such refund is attributable or allocable in whole or in part to 
taxes or assessments paid during any period of time during which Tenant was 
paying a share of real property taxes and assessments on the Property or any 
portion thereof pursuant to this Lease, then the portion of such refund 
received by Landlord that is fairly allocable to the amounts actually paid by 
Tenant for such real property taxes and assessments during any portion of the 
refund period shall be applied as a credit against Tenant's remaining 
Operating Expense obligations under this Lease and, to the extent such credit 
exceeds the total amount of Tenant's remaining Operating Expense obligations 
under this Lease, shall be refunded in cash by Landlord to Tenant 
concurrently with the final reconciliation of Tenant's Operating Expense 
obligations under this Lease.

    5.2.     DEFINITION OF OPERATING EXPENSES.  Subject to the exclusions and 
provisions hereinafter contained, the term "Operating Expenses" shall mean 
the total costs and expenses incurred by or allocable to Landlord for 
management, operation and maintenance of the Property and the buildings and 
other improvements thereon, including, without limitation, the following 
costs and expenses:

             (i)    insurance, property management, landscaping and 
    operations, repairs and maintenance of buildings and Common Areas, EXCEPT 
    that property management expenses shall be excluded to the extent they 
    exceed two percent (2%) of minimum rent;

             (ii)   all utilities and services;

             (iii)  real and personal property taxes and assessments or 
    substitutes therefor, including (but not limited to) any possessory 
    interest, use, business, license or other taxes or fees, any taxes 
    imposed directly on rents or services, any assessments or charges for 
    police or fire protection, housing, transit, open space, street or 
    sidewalk construction or maintenance or other similar services from time 
    to time by any governmental or quasi-governmental entity, and any other 
    new taxes on landlords in addition to taxes now in effect, but EXCLUDING 
    (aa) fees, exactions and taxes imposed as a condition to the

                                      -13-




    issuance of any entitlements or building permits related to the Property 
    and (bb) gift taxes, inheritance taxes, transfer taxes and net income 
    taxes of Landlord;

             (iv)   supplies, equipment, utilities and tools used in 
    management, operation and maintenance of the Property;

             (v)    capital improvements to the Property or the buildings and 
    other improvements thereon, amortized over the reasonable useful life of 
    the applicable improvement, (aa) which reduce or will cause future 
    reduction of other items of Operating Expenses for which Tenant is 
    otherwise required to contribute (PROVIDED that the amortizable costs 
    for this category of improvement shall be limited to the amount of the 
    reasonably estimated savings to be produced thereby), or (bb) which are 
    required by law, ordinance, regulation or order of any governmental 
    authority, or (cc) of which Tenant has use or which benefit Tenant 
    (PROVIDED that amortizable improvements under this category shall be 
    limited to those which are approved in writing by Tenant or which are 
    merely a reasonably necessary repair or replacement of an existing 
    improvement with one of like kind and quality, in which event no such 
    approval by Tenant shall be required; and PROVIDED FURTHER that Tenant's 
    obligation with respect to any amortization of capital expenditures under 
    this Section 5.2(v) shall terminate on the earlier of (x) the expiration 
    of the term of this Lease or (y) the next date as of which 
    minimum rental under this Lease is adjusted or reset to a new rental 
    based on fair market rental value (excluding, however, any CPI-based or 
    stepped adjustments pursuant to Section 3.1(a) or (b) or pursuant to a 
    prior fair market rental determination)); and

             (vi)   any other costs (including, but not limited to, any 
    parking or utilities fees or surcharges) allocable to or paid by 
    Landlord, as owner of the Property or the buildings and other 
    improvements thereon, pursuant to any applicable laws, ordinances, 
    regulations or orders of any governmental or quasi-governmental authority 
    or pursuant to the terms of any declarations of covenants, conditions and 
    restrictions now or hereafter affecting the Property.

The destination between items of ordinary operating maintenance and repair 
and items of a capital nature shall be made in accordance with generally 
accepted accounting principles applied on a consistent basis. Notwithstanding 
any other provisions of this Section 5.2, Operating Expenses shall NOT 
include any of the following:

             (A)  any costs attributable to the work for which Landlord is 
    required to pay under Section 2.4 or EXHIBIT C;

             (B) that portion of any Operating Expenses (other than Operating 
    Expenses to which Tenant's Land Operating Expense Share is applicable) 
    that is fairly allocable to any undeveloped portion of the Property, 
    until such time as the building(s) and improvements on such portion of 
    the property have been substantially completed and such portion of the 
    Property is properly includable in determining Tenant's Building 
    Operating Cost Share under Section 5.1(b) hereof;

             (C)  that cost to repair damage caused by (i) fire, earthquake 
    or other peril, or (ii) the negligence of Landlord, its agents, employees 
    or contractors, or any other tenants of the Property or their respective 
    agents, employees, contractors or invitees;

             (D)  costs associated with procurement of new tenants, 
    preparation of their spaces and enforcement of their leases, including 
    (but not limited to) brokerage commissions, tenant improvement costs, and 
    attorneys' fees;

             (E)  the cost of maintenance and repair of structural elements 
    of the buildings located on the Property from time to time;

             (F)  the cost to repair any defects in design, construction or 
    equipment for any building located on the Property from time to time, to 
    the extent resulting from or attributable to work undertaken by Landlord 
    or by its contractors on Landlord's behalf


                                     -14-


    (including, but not limited to, costs to correct any building code 
    violations caused by or attributable to Landlord's work);

             (G) the cost to investigate and/or remediate any contamination 
    by hazardous or toxic substances or wastes, except to the extent caused 
    by Tenant or its agents, employees or contractors; or

             (H) the cost to correct any violation of any declaration of 
    covenants, conditions and restrictions applicable to the Property, except 
    to the extent such violation is caused by Tenant or its agents, 
    employees or contractors.

    5.3.     DETERMINATION OF OPERATING EXPENSES.  On or before the 
Commencement Date and during the last month of each calendar year of the term 
of this Lease ("Lease Year"), or as soon thereafter as practical, Landlord 
shall provide Tenant notice of Landlord's estimate of the Operating Expenses 
for the ensuing Lease Year or applicable portion thereof. On or before the 
first day of each month during the ensuing Lease Year or applicable portion 
thereof, beginning on the Commencement Date, Tenant shall pay to Landlord 
Tenant's Land Operating Cost Share or Tenant's Building Operating Cost Share, 
as applicable, of the portion of such estimated Operating Expenses allocable 
(on a prorata basis) to such month; provided, however, that if such notice is 
not given in the last month of a Lease Year, Tenant shall continue to pay on 
the basis of the prior year's estimate, if any, until the month after such 
notice is given. If at any time or times it appears to Landlord that the 
actual Operating Expenses will vary from Landlord's estimate by more than five 
percent (5%), Landlord may, by notice to Tenant, revise its estimate for such 
year and subsequent payments by Tenant for such year shall be based upon such 
revised estimate.

     5.4.    FINAL ACCOUNTING FOR LEASE YEAR.  Within ninety (90) days after 
the close of each Lease Year, or as soon after such 90-day period as 
practicable, Landlord shall deliver to Tenant a statement of Tenant's Land 
Operating Cost Share and Tenant's Building Operating Cost Share, as 
applicable, of the Operating Expenses for such Lease Year prepared by 
Landlord from Landlord's books and records, which statement shall be final 
and binding on Landlord and Tenant, except as otherwise provided herein. 
Notwithstanding any other provisions of this Section 5.4, Tenant shall have 
the right to audit or review, directly or through its designated 
representative, Landlord's books and records relating to Operating Expenses 
for any period subject to the following conditions: Such right shall be 
exercisable only by written request to Landlord within 180 days after 
Tenant's receipt from Landlord of a statement of actual Operating Expenses, 
shall be limited to the period covered by such statement, and shall be 
exercisable only during normal business hours, on not less than ten (10) days 
prior written notice to Landlord, and at Tenant's sole cost and expense, 
except as hereinafter provided. To the extent that Tenant, following any such 
review or audit, disputes any item in the applicable statement or in the 
calculation of Tenant's obligations thereunder, Tenant shall give Landlord 
written notice of the disputed items, in reasonable detail and with 
reasonable supporting information, and Landlord and Tenant shall negotiate 
diligently and in good faith to try to resolve the dispute. If Landlord and 
Tenant are unable to resolve the dispute within thirty (30) days after 
Landlord's receipt of Tenant's written notice specifying the disputed items, 
then either party may elect, by written notice to the other, to have the 
dispute resolved through a review and determination by an independent 
Certified Public Accountant who has not previously rendered professional 
services to either party. Such review and determination by the independent 
CPA shall be based on generally accepted accounting principles and tax 
accounting principles, consistently applied. The independent CPA shall be 
selected by mutual agreement of Landlord and Tenant; if they are unable to 
agree on such selection within twenty (20) days after a party's notice of 
desire to submit the dispute to a CPA review, then the independent CPA shall 
be appointed by the Presiding Judge of the Alameda County Superior Court upon 
application by either party (with notice to the other party). If it is 
determined, on the basis of Landlord's statement or by mutual agreement of 
Landlord and Tenant or by independent CPA review, as applicable, that Tenant 
owes an amount that is more or less than the estimated payments previously 
made by Tenant for the applicable period, then Tenant or Landlord, as the 
case may be, shall pay the deficiency or overpayment to the other party 
within thirty (30) days after final determination of such underpayment or 
overpayment. The expenses of the independent CPA, if any, shall be borne by 
Tenant unless the CPA's determination reflects an overstatement or overpayment
of five percent (5%) or more in Tenant's obligation for Operating Expenses for
the applicable period, in which

                                      -15-


event the expenses of the independent CPA shall be borne by Landlord. Each 
party agrees to maintain the confidentiality of the findings of any audit or 
review in accordance with the provisions of this Section 5.4. Failure or 
inability of Landlord to deliver the annual statement within such ninety (90)
day period shall not impair or constitute a waiver of Tenant's obligation to 
pay Operating Expenses, or cause Landlord to incur any liability for damages.

     5.5.    PRORATION. If the Commencement Date falls on a day other than 
the first day of a Lease Year or if this Lease terminates on a day other than 
the last day of a Lease Year, the amount of Tenant's Land Operating Cost 
Share and Tenant's Building Operating Cost Share, as applicable, payable by 
Tenant with respect to such first or last partial Lease Year shall be 
prorated on the basis which the number of days during such Lease year in 
which this Lease is in effect bears to 365. The termination of this Lease 
shall not affect the obligations of Landlord and Tenant pursuant to Section 
5.4 to be performed after such termination.

                                6. UTILITIES

     6.1.    PAYMENT - Commencing with the Commencement Date and thereafter 
throughout the term of this Lease, Tenant shall pay, before delinquency, all 
charges for water, gas, heat, light, electricity, power, sewer, telephone, 
alarm system, janitorial and other services or utilities supplied to or 
consumed in or upon the Premises, including any taxes on such services and 
utilities.  In connection with the impending deregulation of the supply of 
electrical power in California, Tenant shall have the right to designate or 
select the service provider for electrical power to be supplied to the 
Building (but not to the Common Areas, as to which any such designation or 
selection shall be made by Landlord alone).

     6.2.    INTERRUPTION.  There shall be no abatement of rent or other 
charges required to be paid hereunder and Landlord shall not be liable in 
damages or otherwise for interruption or failure of any service or utility 
furnished to or used in the Premises because of accident, making of repairs, 
alterations or improvements, severe weather, difficulty or inability in 
obtaining services or supplies, labor difficulties or any other cause. 
Notwithstanding the foregoing provisions of this Section 6.2, however, in the 
event of any interruption or failure of any service or utility to the 
Premises which is caused in whole or in part by the negligence or willful 
misconduct of Landlord or its agents or employees, which continues for more 
than 48 hours and which materially impairs Tenant's ability to use the 
Premises for their intended purpose hereunder, then Tenant's rental 
obligations under this Lease shall be abated in proportion to the extent of 
the proportional fault of Landlord and its agents and employees and in  
proportion to the degree of impairment of Tenant's use of the Premises, and 
such abatement shall be retroactive to the commencement of the interruption 
or failure and shall continue until Tenant's use of the premises is no longer 
materially impaired thereby.
                                       
                                7. ALTERATIONS

     7.1.    RIGHT TO MAKE ALTERATIONS.  Tenant shall make no alterations, 
additions or improvements to the Premises, other than interior non-structural 
alterations costing less than Fifty Thousand Dollars ($50,000.00) in each 
instance, without the prior written consent of Landlord. All such alterations,
additions and improvements shall be completed with due diligence in a 
first-class workmanlike manner, in compliance with plans and specifications 
approved in writing by Landlord and in compliance with all applicable laws, 
ordinances, rules and regulations. All such alterations, additions and 
improvements shall be performed solely by a licensed and bonded general 
contractor approved by Landlord, and Landlord shall be named as an additional 
insured on such contractor's bond. Landlord may also, at its election, 
require Tenant to furnish to Landlord, at Tenant's sole cost and expense, a 
lien and completion bond in an amount equal to one and one-half times the 
estimated cost of any such work, to ensure completion of the work and to 
protect Landlord against any liens or claims relating thereto. If Tenant 
wishes to know in advance whether it will be required to remove any specific 
alteration, addition or improvement upon termination of this Lease, as 
contemplated in Section 7.2 hereof, then Tenant shall make an express written 
request for such a determination by Landlord at the time Tenant requests 
Landlord's approval of the applicable alteration, addition or improvement; if 
Tenant makes such a written request and Landlord does not, in response 
thereto, advise Tenant that Landlord intends

                                      -16-


to require (or at least to reserve the right to require) the removal of the 
applicable alteration, addition or improvement upon expiration of this Lease, 
then Landlord shall not be entitled to request such removal, notwithstanding 
any contrary provisions in Section 7.2 hereof.

    7.2.     TITLE TO ALTERATIONS. All alterations, additions and 
improvements installed in, on or about the Premises shall be part of the 
Building and the property of Landlord, unless Landlord elects to require 
Tenant to remove the same upon the termination of this Lease; PROVIDED, 
however, that (a) the foregoing shall not apply to Tenant's movable 
furniture and trade fixtures not affixed to the Property, and (b) Tenant 
shall not under any circumstances be required to remove any of the 
improvements constructed by Landlord pursuant to Section 2.4 and EXHIBIT C.

    7.3.     TENANT FIXTURES. Notwithstanding the provisions of Sections 7.1 
and 7.2, Tenant may install, remove and reinstall trade fixtures without 
Landlord's prior written consent, except that any fixtures which are affixed 
to the Premises or which affect the exterior or structural portions of the 
Building shall require Landlord's written approval. The foregoing shall apply 
to Tenant's signs, logos and insignia, all of which Tenant shall have the 
right to place and remove and replace subject only to (a) Landlord's prior 
written consent as to location, size and composition and (b) compliance with 
all applicable legal requirements and all applicable covenants, conditions 
and restrictions. It is the intention of the parties that Tenant shall have 
signage rights on the Building consistent with Hacienda Business Park Owners' 
Association requirements, applicable City requirements and applicable 
covenants, conditions and restrictions, and that Landlord's approval with 
respect to any signage proposed by Tenant that meets the foregoing criteria 
shall not be unreasonably withheld or delayed. In addition to Building 
signage, Tenant shall have exclusive rights to use a monument sign to be 
installed by Landlord at the entrance to the Building off of Coronado Avenue, 
PROVIDED that (i) such sign shall be subject to Hacienda Business Park 
Owners' Association requirements, applicable City requirements and applicable 
covenants, conditions and restrictions, (ii) such sign shall be subject to 
Landlord's written consent (not unreasonably withheld or delayed) as set 
forth above, and (iii) such sign shall be charged against the tenant 
improvement allowance for Landlord's work under Section 2.4 and EXHIBIT C or, 
to the extent not so charged, shall be paid by Tenant to Landlord in cash, as 
Tenant's sole cost and expense, within thirty (30) days after written request 
by Landlord to Tenant (accompanied by reasonably detailed supporting 
information regarding the costs for which such payment or reimbursement is 
being claimed). Tenant shall immediately repair any damage caused by 
installation and removal of fixtures by Tenant or its employees, agents or 
contractors under this Section 7.3.

    7.4.     NO LIENS. Tenant shall at all times keep the Premises free from 
all liens and claims of any contractors, subcontractors, materialmen, 
suppliers or any other parties employed either directly or indirectly by 
Tenant in construction work on or about the Premises. Tenant may contest any 
claim of lien, but only if, prior to such contest, Tenant either (i) posts 
security in the amount of the claim, plus estimated costs and interest, or 
(ii) records a bond of a responsible corporate surety in such amount as may 
be required to release the lien from the Premises. Tenant shall indemnify, 
defend and hold Landlord harmless against any and all liability, loss, 
damage, cost and other expenses, including, without limitation, reasonable 
attorneys' fees, arising out of claims of any lien for work performed or 
materials or supplies furnished at the request of Tenant or persons claiming 
under Tenant.

                           8. MAINTENANCE AND REPAIRS

    8.1.     LANDLORD'S WORK.

             (a)  Landlord shall repair and maintain or cause to be repaired 
and maintained the Common Areas of the Property and the roof, exterior walls 
and other structural portions of the Building. The cost of all work performed 
by Landlord under this Section 8.1(a) shall be an Operating Expense 
hereunder, except to the extent such work (i) is required due to the 
negligence or willful misconduct of Landlord or its agents or employees, of 
any other tenant of the Property other than Tenant or of the agents, employees 
or invitees of any such other tenant, (ii) is a service to a specific tenant 
or tenants, other than Tenant, for which Landlord has received or has the 
right to receive full reimbursement, (iii) is a capital expense not 
includible as an Operating Expense

                                     -17-


under Section 5.2 hereof, (iv) is otherwise expressly excluded from the 
definition of Operating Expenses under Section 5.2 hereof, or (v) is required 
due to the negligence or willful misconduct of Tenant or its agents, employees 
or invitees (in which event Tenant shall bear the full cost of such work 
pursuant to the indemnification provided in Section 10.6 hereof, subject to 
the release set forth in Section 10.4 hereof). Tenant knowingly and 
voluntarily waives the right to make repairs at Landlord's expense, or to 
offset the cost thereof against rent, under any law, statute, regulation or 
ordinance now or hereafter in effect.

             (b)  Notwithstanding any contrary provisions of Section 8.1(a) 
hereof or of any other provision of this Lease, to the extent a substantially 
complete replacement (as opposed to ordinary or routine maintenance or 
repair) is required from time to time with respect to the roof or major 
building systems (HVAC, plumbing, electrical and mechanical systems) of the 
Building, or with respect to the parking or driveway areas or other portions 
of the Common Areas of the Property, Landlord shall perform such replacement 
when and as reasonably required. To the extent such replacement is required 
as a result of defective design, construction, installation or materials, or 
as a result of the negligence or willful misconduct of Landlord or its agents 
or employees, or as a result of the negligence or willful misconduct of any 
other tenant of the Property other than Tenant or of any such other tenant's 
agents, employees or invitees, such replacement shall be at Landlord's sole 
cost and expense, subject to any rights of reimbursement Landlord may have 
against contractors, suppliers, other tenants or other third parties. To the 
extent such replacement is required as a result of the negligence or willful 
misconduct of Tenant or its agents, employees or invitees, Tenant shall bear 
the full cost of such work pursuant to the indemnification provided in Section 
10.6 hereof, subject to the release set forth in Section 10.4 hereof. To the 
extent such replacement is required as a result of casualty or condemnation, 
the provisions of Article 13 hereof shall be controlling. To the extent such 
replacement is required due to ordinary wear and tear or obsolescence, the 
cost of such replacement shall be amortized by Landlord over the useful life 
of the replacement improvement or system and either (i) in the case of 
replacement of the roof or a major building system of the Building, Tenant 
shall reimburse to Landlord, as additional rent and not as an Operating 
Expense, on a monthly basis or at other regular intervals as reasonably 
requested by Landlord, the entire amortized cost of such replacement 
allocable to the period of time from the date of replacement until the 
earlier of (x) the expiration of the term of this Lease or (y) the next date 
as of which minimum rental under this Lease is adjusted or reset to a new 
rental based on fair market rental value (excluding, however, any CPI-based 
or stepped adjustments pursuant to Section 3.1(a) or (b) or pursuant to a 
prior fair market rental determination), or (ii) in the case of replacement 
of parking or driveway areas or other portions of the Common Areas, the 
amortized cost of such replacement shall be recoverable by Landlord as an 
Operating Expense pursuant to Section 5.2(v)(cc) hereof.

    8.2.     TENANT'S OBLIGATION FOR MAINTENANCE.

             (a)  GOOD ORDER, CONDITION AND REPAIR. Subject to the 
provisions of Section 2.4 hereof, by accepting possession of the Premises 
(excluding any portion thereof in which interior improvements have not been 
completed as a result of the phased construction of such interior 
improvements) on the Commencement Date, Tenant shall be deemed to acknowledge 
that the Premises (or the applicable initial portion thereof) are then in 
good and sanitary order, condition and repair. Except as provided in Section 
8.1 hereof, Tenant at its sole cost and expense shall keep and maintain in 
good and sanitary order, condition and repair the Premises and every part 
thereof, wherever located, including but not limited to the signs, interior, 
ceiling, electrical system, plumbing system, telephone and communications 
systems, HVAC equipment and related mechanical systems serving the Premises 
(for which equipment and systems Tenant shall enter into a service contract 
with a person or entity designated or approved by Landlord), all doors, 
door checks, windows, plate glass, door fronts, utility facilities, fixtures, 
lighting, wall surfaces, floor surfaces and ceiling surfaces and all other 
interior repairs, foreseen and unforeseen, as required.

             (b)  LANDLORD'S REMEDY. If Tenant, after notice from Landlord, 
fails to make or perform promptly any repairs or maintenance which are the 
obligation of Tenant hereunder, Landlord shall have the right, but shall not 
be required, to enter the Premises and make the repairs or perform the 
maintenance necessary to restore the Premises to good and sanitary order, 
condition and repair. Immediately on demand from Landlord, the cost of such 
repairs shall be due and payable by Tenant to Landlord.

                                     -18-


             (c)  CONDITION UPON SURRENDER. At the expiration or sooner 
termination of this Lease, Tenant shall surrender the Premises, including any 
additions, alterations and improvements thereto, broom clean, in good and 
sanitary order, condition and repair, ordinary wear and tear excepted, first, 
however, removing all goods and effects of Tenant and all fixtures and items 
required to be removed or specified to be removed at Landlord's election 
pursuant to this Lease, and repairing any damage caused by such removal. 
Tenant expressly waives any and all interest in any personal property and 
trade fixtures not removed from the Premises by Tenant at the expiration or 
termination of this Lease, agrees that any such personal property and trade 
fixtures may, at Landlord's election, be deemed to have been abandoned by 
Tenant, and authorizes Landlord (at its election and without prejudice to any 
other remedies under this Lease or under applicable law) to remove and either 
retain, store or dispose of such property at Tenant's cost and expense, and 
Tenant waives all claims against Landlord for any damages resulting from any 
such removal, storage, retention or disposal.

                             9. USE OF PREMISES

    9.1.     PERMITTED USE. Tenant may use the Premises solely for office and 
administrative purposes, production of payroll checks, light assembly of 
products, storage, non-retail marketing and sales demonstrations and training 
classes, and for no other purpose without the prior written consent of 
Landlord.

    9.2.     [Omitted.]

    9.3.     NO NUISANCE. Tenant shall not use the Premises for or carry on 
or permit upon the Premises or any part thereof any offensive, noisy or 
dangerous trade, business, manufacture, occupation, odor or fumes, or any 
nuisance or anything against public policy, nor interfere with the rights or
business of any other tenants or of Landlord in or about the Property, nor 
commit or allow to be committed any waste in, on or about the Premises, nor 
make any other unreasonable use of the Premises. Tenant shall not do or 
permit anything to be done in or about the Premises, nor bring nor keep 
anything therein, which will in any way cause the Premises to be uninsurable 
with respect to the insurance required by this Lease or with respect to 
standard fire and extended coverage insurance with vandalism, malicious 
mischief and riot endorsements.

    9.4.     COMPLIANCE WITH LAWS. Tenant shall not use the Premises or 
permit the Premises to be used in whole or in part for any purpose or use that
is in violation of any applicable laws, ordinances, regulations or rules of 
any governmental agency or public authority. Tenant shall keep the Premises 
equipped with all safety appliances required by law, ordinance or insurance 
on the Premises, or any order or regulation of any public authority because 
of Tenant's particular use of the Premises. Tenant shall procure all licenses 
and permits required for Tenant's use of the Premises. Tenant shall use the 
Premises in strict accordance with all applicable ordinances, rules, laws and 
regulations and shall comply with all requirements of all governmental 
authorities now in force or which may hereafter be in force pertaining to the 
use of the Premises by Tenant, including, without limitation, regulations 
applicable to noise, water, soil and air pollution, and making such 
nonstructural alterations and additions thereto as may be required from time 
to time by such laws, ordinances, rules, regulations and requirements of 
governmental authorities or insurers of the Premises (collectively, 
"Requirements") because of Tenant's construction of improvements in or other 
particular use of the Premises. Any structural alterations or additions 
required from time to time by applicable Requirements because of Tenant's 
construction of improvements in or other particular use of the Premises 
shall, at Landlord's election, either (i) be made by Tenant, at Tenant's 
sole cost and expense, in accordance with the procedures and standards set 
forth in Section 7.1 for alterations by Tenant, or (ii) be made by Landlord 
at Tenant's sole cost and expense, in which event Tenant shall pay to Landlord 
as additional rent, within ten (10) days after demand by Landlord, an amount 
equal to all costs incurred by Landlord in connection with such alterations 
or additions. The judgment of any court, or the admission by Tenant in any 
proceeding against Tenant, that Tenant has violated any law, statute, 
ordinance or governmental rule, regulation or requirement shall be conclusive 
of such violation as between Landlord and Tenant.

    9.5.     LIQUIDATION SALES. Tenant shall not conduct or permit to be 
conducted any auction, bankruptcy sale, liquidation sale, or going out of 
business sale, in, upon or about the

                                     -19-


Premises or the Property, whether said auction or sale be voluntary, 
involuntary or pursuant to any assignment for the benefit of creditors, or 
pursuant to any bankruptcy or other insolvency proceeding.

    9.6.     ENVIRONMENTAL MATTERS. Without limiting the generality of 
Tenant's obligations set forth in Section 9.4 of this Lease:

             (a) Tenant shall not cause or permit any hazardous or toxic 
substance or hazardous waste (as defined in any federal, state or local law, 
ordinance or regulation applicable to such substances or wastes) to be 
brought upon, kept, stored or used on or about the Property without the prior 
written consent of Landlord; PROVIDED, however, that nothing in this 
paragraph (a) shall prohibit Tenant from using ordinary office and cleaning 
products and other materials reasonably necessary for the conduct of Tenant's 
business for the permitted uses described in Section 9.1 hereof, regardless 
of whether such materials constitute hazardous or toxic substances or 
hazardous wastes, so long as Tenant provides Landlord with prior or 
concurrent written notice of such use and complies with the requirements of 
paragraphs (b) and (c) hereof with respect to such use;

             (b) Tenant shall comply with all applicable laws, rules, 
regulations, orders, permits, licenses and operating plans of any 
governmental authority with respect to the receipt, use, handling, 
generation, transportation, storage, treatment, release and/or disposal of 
hazardous or toxic substances or wastes in the course of or in connection 
with the conduct of Tenant's business on the Property, and shall provide 
Landlord with copies of (x) any and all permits, licenses, registrations and 
other similar documents that authorize Tenant to conduct any such activities 
in connection with Tenant's use of the Property and (y) any and all notices 
and written communications actually given by Tenant to or received by Tenant 
from, or required by law to be given by Tenant to, regulatory authorities in 
connection with such activities in the course of Tenant's use of the Property;

             (c) Tenant shall indemnify, defend and hold Landlord harmless 
from and against any and all claims, losses, damages, liabilities, costs, 
legal fees and expenses of any sort arising out of or relating to (i) any 
failure by Tenant to comply with any provisions of subparagraph (a) or (b) 
above, or (ii) any receipt, use, handling, generation, transportation, 
storage, treatment, release and/or disposal of any hazardous or toxic 
substances or wastes on or about the Property in connection with Tenant's use 
or occupancy of the Property or as a result of any intentional or negligent 
acts or omissions of Tenant or of any agent or employee of Tenant;

             (d) Landlord shall indemnify, defend and hold Tenant harmless 
from and against any and all claims, losses, damages, liabilities, costs, 
legal fees and expenses of any sort arising out of or relating to (i) the 
presence on the Property of any hazardous or toxic substances or wastes 
present on the Property as of the Commencement Date (other than as a result 
of any intentional or negligent acts or omissions of Tenant or of any agent 
or employee of Tenant), and/or (ii) any unauthorized release into the 
environment of hazardous or toxic substances or wastes to the extent such 
release results from the negligence of or willful misconduct or omission by 
Landlord or its agents or employees; and

             (e) The provisions of this Section 9.6 shall survive the 
termination of this Lease.

                             10. INSURANCE AND INDEMNITY

    10.1.    INSURANCE.

             (a) Tenant shall procure and maintain in full force and effect 
at all times during the term of this Lease, at Tenant's cost and expense, 
commercial general liability insurance to protect against any liability to 
the public, or to any invitee of Tenant, arising out of or related to the use 
of or resulting from any accident occurring in, upon or about the Premises, 
with limits of liability of not less than (i) One Million Dollars 
($1,000,000.00) for injury to or death of one person, (ii) Three Million 
Dollars ($3,000,000.00) for personal injury or death, per occurrence,

                                     -20-


and (iii) Five Hundred Thousand Dollars ($500,000.00) for property damage, or 
a combined single limit of bodily injury and property damage insurance of not 
less than Five Million Dollars ($5,000,000.00). Such insurance shall name 
Landlord and its general partners as additional insureds thereunder.  The 
amount of such insurance shall not be construed to limit any liability or 
obligation of Tenant under this Lease.

             (b)  Landlord shall procure and maintain in full force and effect
at all times during the term of this Lease, at Landlord's cost and expense 
(but reimbursable as an Operating Expense under Section 5.2 hereof), fire and 
"all risk" extended coverage property damage insurance for the Building and 
for the improvements in the Common Areas of the Property on a full 
replacement cost basis, with rental loss insurance. Such insurance may 
include earthquake coverage to the extent Landlord in its discretion elects 
to carry such coverage, and shall have such commercially reasonable 
deductibles and other terms as Landlord in its discretion determines to be 
appropriate.  Landlord shall have no obligation to carry property damage 
insurance for any alterations, additions or improvements installed by Tenant 
on or about the Premises. Tenant shall have no obligation to reimburse or 
compensate Landlord for the "deductible" portion of any insured losses, 
except to the extent either (i) such losses result from the negligence or 
willful misconduct of Tenant or its agents, employees or invitees (as 
contemplated in Section 8.1(a)(v) and/or Section 10.6 hereof, but subject to 
the release set forth in Section 10.4 hereof), or (ii) Tenant elects to pay 
repair or restoration costs under Section 13.1 hereof in order to avoid a 
termination of this Lease under certain circumstances as specified in such 
Section 13.1.

             (c)  Tenant shall procure and maintain in full force and effect 
at all times during the term of this Lease, at Tenant's cost and expense, 
fire and "all risk" extended coverage property damage insurance for all 
alterations, additions and improvements installed by Tenant from time to time 
on or about the Premises (excluding, however, Tenant's trade fixtures, 
equipment and personal property, as to which Tenant has no insurance 
obligation hereunder), on a full replacement cost basis. Such insurance may 
have such commercially reasonable deductibles and other terms as Tenant in 
its discretion determines to be appropriate.

    10.2.    QUALITY OF POLICIES AND CERTIFICATES.  All policies of insurance 
required hereunder shall be issued by responsible insurers and shall be 
written as primary policies not contributing with and not in excess of any 
coverage that Landlord may carry. Tenant shall deliver to Landlord copies of 
policies or certificates of insurance showing that said policies are in 
effect. The coverage provided by such policies shall include the clause or 
endorsement referred to in Section 10.4. If Tenant fails to acquire, maintain 
or renew any insurance required to be maintained by it under this Article 10 
or to pay the premium therefor, then Landlord, at its option and in addition 
to its other remedies, but without obligation so to do, may procure such 
insurance, and any sums expended by it to procure any such insurance shall be 
repaid upon demand, with interest as provided in Section 3.2 hereof. Tenant 
shall obtain written undertakings from each insurer under policies required 
to be maintained by it to notify all insureds thereunder at least thirty (30) 
days prior to cancellation, amendment or revision of coverage.

     10.3.   WORKERS' COMPENSATION. Tenant shall maintain in full force and 
effect during the term of this Lease workers' compensation insurance covering 
all of Tenant's employees working on the Premises.

     10.4.   WAIVER OF SUBROGATION. Notwithstanding anything to the contrary 
contained in this Lease, to the extent permitted by law and without affecting 
the coverage provided by insurance required to be maintained hereunder, 
Landlord and Tenant each waive any right to recover against the other (i) 
damage to property, (ii) damage to the Property or any part thereof, or (iii) 
claims arising by reason of any of the foregoing, but only to the extent that 
any of the foregoing damages and claims under subparts (i)-(iii) hereof are 
covered, and only to the extent of such coverage, by insurance actually 
carried or required to be carried hereunder by either Landlord or Tenant. 
This provision is intended to waive fully, and for the benefit of each party, 
any rights and claims which might give rise to a right of subrogation in any 
insurance carrier. Each party shall procure a clause or endorsement on any 
policy required under this Article 10 denying to the insurer rights of 
subrogation against the other party to the extent rights have been waived by 
the insured prior to the occurrence of injury or loss. Coverage provided by 
insurance maintained by Tenant under this Article 10 shall not be limited, 
reduced or diminished by virtue of the subrogation waiver herein contained.

                                     -21-


     10.5.   INCREASE IN PREMIUMS. Tenant shall do all acts and pay all 
expenses necessary to insure that the Premises are not used for purposes 
prohibited by any applicable fire insurance, and that Tenant's use of the 
Premises complies with all requirements necessary to obtain any such 
insurance. If Tenant uses or permits the Premises to be used in a manner 
which increases the existing rate of any insurance on the Premises carried by 
Landlord, Tenant shall pay the amount of the increase in premium caused 
thereby, and Landlord's costs of obtaining other replacement insurance 
policies, including any increase in premium, within ten (10) days after 
demand therefor by Landlord.

     10.6.   INDEMNIFICATION.

             (a) Tenant shall indemnify, defend and hold Landlord, its 
partners, shareholders, officers, directors, affiliates, agents, employees 
and contractors, harmless from any and all liability for injury to or death 
of any person, or loss of or damage to the property of any person, and all 
actions, claims, demands, costs (including, without limitation, reasonable 
attorneys' fees), damages or expenses of any kind arising therefrom which may 
be brought or made against Landlord or which Landlord may pay or incur by 
reason of the use, occupancy and enjoyment of the Property by Tenant or any 
invitees, sublessees, licensees, assignees, employees, agents or contractors 
of Tenant or holding under Tenant from any cause whatsoever other than 
negligence or willful misconduct or omission by Landlord, its agents, 
employees or contractors. Landlord, its partners, shareholders, officers, 
directors, affiliates, agents, employees and contractors shall not be liable 
for, and Tenant hereby waives all claims against such persons for, damages to 
goods, wares and merchandise in or upon the Property, or for injuries to 
Tenant, its agents or third persons in or upon the Property, from any cause 
whatsoever other than negligence or willful misconduct or omission by 
Landlord, its agents, employees or contractors. Tenant shall give prompt 
notice to Landlord of any casualty or accident in, on or about the Property.

             (b) Landlord shall indemnify, defend and hold Tenant, its 
partners, shareholders, officers, directors, affiliates, agents, employees 
and contractors, harmless from any and all liability for injury to or death 
of any person, or loss of or damage to the property of any person, and all 
actions, claims, demands, costs (including, without limitation, reasonable 
attorneys' fees), damages or expenses of any kind arising therefrom which may 
be brought or made against Tenant or which Tenant may pay or incur, to the 
extent such liabilities or other matters arise by reason of any negligence or 
willful misconduct or omission by Landlord, its agents, employees or 
contractors.

    10.7.  BLANKET POLICY.  Any policy required to be maintained hereunder 
may be maintained under a so-called "blanket policy" insuring other parties 
and other locations so long as the amount of insurance required to be 
provided hereunder is not thereby diminished.

                        11. SUBLEASE AND ASSIGNMENT

     11.1.   ASSIGNMENT AND SUBLEASE OF PREMISES.  Tenant shall not have the 
right or power to assign its interest in this Lease, or make any sublease of 
the Premises or any portion thereof, nor shall any interest of Tenant under 
this Lease be assignable involuntarily or by operation of law, without on 
each occasion obtaining the prior written consent of Landlord, which consent 
shall not be unreasonably withheld. Any purported sublease or assignment of 
Tenant's interest in this Lease requiring but not having received Landlord's 
consent thereto shall be void. Any dissolution, consolidation, merger or 
other reorganization of Tenant, or any series of one or more of such related 
events, involving in the aggregate a change of fifty percent (50%) or more 
in the beneficial ownership of Tenant, or any sale of all or substantially all 
of the assets of Tenant, shall be deemed to be an assignment hereunder and 
shall be void without the prior written consent of Landlord as required above. 
Notwithstanding the foregoing, Landlord's consent shall not in any event be 
required for (i) an initial public offering of the common stock of Tenant, or 
for any stock transfer or conversion in connection with any such initial 
public offering; (ii) any merger, consolidation or other reorganization, or 
any sale of substantially all of the assets of Tenant, PROVIDED that (x) the 
net worth of the surviving entity or transferee is equal to or greater than 
that of Tenant immediately prior to the applicable transaction, (y) Tenant 
gives Landlord prior or concurrent written notice of the applicable 
transaction, and (z) the surviving entity or transferee expressly assumes in 
writing, for the benefit of Landlord, Tenant's remaining obligations under

                                      -22-


this Lease; and/or (iii) any sale or transfer of the stock of Tenant, other 
than pursuant to a dissolution, consolidation, merger, reorganization or sale 
of substantially all assets as specifically described above.

     11.2.   RIGHTS OF LANDLORD.  Consent by Landlord to one or more 
assignments of this Lease, or to one more sublettings of the Premises or any 
portion thereof, or collection of rent by Landlord from any assignee or 
sublessee, shall not operate to exhaust Landlord's rights under this Article 
11, nor constitute consent to any subsequent assignment or subletting. No 
assignment of Tenant's interest in this Lease and no sublease shall relieve 
Tenant of its obligations hereunder, notwithstanding any waiver or extension 
of time granted by Landlord to any assignee or sublessee, or the failure of 
Landlord to assert its rights against any assignee or sublessee, and 
regardless of whether Landlord's consent thereto is given or required to be 
given hereunder. In the event of a default by any assignee, sublessee or 
other successor of Tenant in the performance of any of the terms or 
obligations of Tenant under this Lease, Landlord may proceed directly against 
Tenant without the necessity of exhausting remedies against any such 
assignee, sublessee or other successor. In addition, Tenant immediately and 
irrevocably assigns to Landlord, as security for Tenant's obligations under 
this Lease, all rent from any subletting of all or a part of the Premises as 
permitted under this Lease, and Landlord, as Tenant's assignee and as 
attorney-in-fact for Tenant, or any receiver for Tenant appointed on 
Landlord's application, may collect such rent and apply it toward Tenant's 
obligations under this Lease; except that, until the occurrence of an act of 
default by Tenant, Tenant shall have the right to collect such rent.

                 12. RIGHT OF ENTRY AND QUIET ENJOYMENT

     12.1.   RIGHT OF ENTRY.  Landlord and its authorized representatives 
shall have the right to enter the Premises at any time during the term of 
this Lease during normal business hours and upon not less than twenty-four 
(24) hours prior notice, except in the case of emergency (in which event no 
notice shall be required and entry may be made at any time), for the purpose 
of inspecting and determining the condition of the Premises or for any other 
proper purpose including, without limitation, to make repairs, replacements 
or improvements which Landlord may deem necessary, to show the Premises to 
prospective purchasers, to show the Premises to prospective tenants (but only 
during the final year of the term of this Lease), and to post notices of 
nonresponsibility. To facilitate exercise of Landlord's right of entry, 
Tenant shall ensure that Landlord or its agent at all times has at least one 
(1) key to unlock all doors in or about the Building, and Tenant shall not 
change any locks in or about the Building without prior notice to Landlord 
and delivery of a key for the new locks to Landlord or its agent. Landlord 
shall not be liable for inconvenience, annoyance, disturbance, loss of 
business, quiet enjoyment or other damage or loss to Tenant by reason of 
making any repairs or performing any work upon the Building or the Property 
or by reason of erecting or maintaining any scaffolding or protective 
barricades in connection with any such work, and the obligations of Tenant 
under this Lease shall not thereby be affected in any manner whatsoever; 
PROVIDED, however, Landlord shall use reasonable efforts to minimize the 
inconvenience to Tenant's normal business operations caused thereby.

     12.2.   QUIET ENJOYMENT.  Landlord covenants that Tenant, upon paying 
the rent and performing its obligations hereunder and subject to all the 
terms and conditions of this Lease, shall peacefully and quietly have, hold 
and enjoy the Premises throughout the term of this Lease, or until this Lease 
is terminated as provided by this Lease.

                13. CASUALTY AND TAKING.

     13.1    TERMINATION OR RECONSTRUCTION.  If during the term of this Lease 
the Building, or any substantial part thereof, is damaged materially by fire 
or other casualty or by action of public or other authority in consequence 
thereof, or if during the term of this Lease the Building or the parking 
area serving the Building, or any material part of either of them, (i) is 
taken by eminent domain or by reason of any public improvement or 
condemnation proceeding, or in any manner by exercise of the right of eminent 
domain (including any transfer in avoidance of an exercise of the power of 
eminent domain), or (ii) receives irreparable damage by reason of anything 
lawfully done under color of public or other authority, then in any such 
event this Lease

                                      -23-


shall terminate as to the entire Premises at either Landlord's or Tenant's 
election, by written notice given to the other party within sixty (60) days 
after the damage or taking has occurred, subject to the following limitations 
(and, to the extent applicable, the limitations set forth in Section 13.2):

             (a)  in the case of damage or destruction by fire or other peril 
prior to the final year of the term of this Lease, Landlord's termination 
right shall be exercisable only if either (x) the reasonably estimated cost 
to repair or restore the Building exceeds eighty percent (80%) of the 
replacement cost of the Building and the remaining term of this Lease 
(including any extended term, if Tenant elects an early exercise of any 
extension option under Section 2.7 hereof in order to avoid a termination 
under this Section 13.1) is less than three (3) years, or (y) the reasonably 
estimated cost to repair or restore the Building exceeds the insurance 
proceeds available for such repair or restoration by an amount greater than 
five percent (5%) of the replacement cost of the Building (unless Tenant 
agrees in writing, within fifteen (15) days after written request by 
Landlord, to pay all repair and restoration costs in excess of the sum of the 
available insurance proceeds plus five percent (5%) of the replacement cost 
of the Building, in which event Landlord shall have no termination right 
under clause (y) of this paragraph (a));

             (b)  in the case of damage or destruction by fire or other peril 
prior to the final year of the term of this Lease, Tenant's termination right 
shall be exercisable only if the time reasonably estimated to be required for 
the repair or restoration of the Building to the extent necessary to permit 
Tenant to resume substantially all of its normal business activities therein 
(which time estimate shall be given by Landlord to Tenant in writing within 
forty-five (45) days after the date of the damage or destruction) exceeds two 
hundred and seventy (270) days from the date of the damage or destruction;

             (c)  in the case of damage or destruction by fire or other peril 
during the final year of the term of this Lease (including any extended term, 
if Tenant has already duly elected such term or elects an early exercise of 
any extension option under Section 2.7 hereof in order to avoid a termination 
under this Section 13.1), Landlord's termination right shall be exercisable 
only if either (x) the reasonably estimated cost to repair or restore the 
Building exceeds twenty percent (20%) of the replacement cost of the 
Building, or (y) the reasonably estimated cost to repair or restore the 
Building exceeds the insurance proceeds available for such repair or 
restoration by an amount greater than five percent (5%) of the replacement 
cost of the Building (unless Tenant agrees in writing, within fifteen (15) 
days after written request by Landlord, to pay all repair and restoration 
costs in excess of the sum of the available insurance proceeds plus five 
percent (5%) of the replacement cost of the Building, in which event Landlord 
shall have no termination right under clause (y) of this paragraph (c)); and

             (d)  in the case of damage or destruction by fire or other peril 
during the final year of the term of this Lease (including any extended term, 
if Tenant has already duly elected such term or elects an early exercise of 
any extension option under Section 2.7 hereof in order to avoid a termination 
under this Section 13.1), Tenant's termination right shall be exercisable only 
if the damage affects more than twenty percent (20%) of the floor area of the 
Building and the time reasonably estimated to be required for the repair or 
restoration of the Building to the extent necessary to permit Tenant to 
resume substantially all of its normal business activities therein (which 
time estimate shall be given by Landlord to Tenant in writing within thirty 
(30) days after the date of the damage or destruction) exceeds sixty (60) 
days from the date of commencement of repairs.

If neither party elects to terminate this Lease pursuant to the foregoing 
termination rights (if any) and/or Section 13.2 (if applicable), then 
Landlord shall promptly and diligently repair any such damage and restore the 
Premises (to the extent of Landlord's work therein under Section 2.4 and 
EXHIBIT C) and the Building as nearly as reasonably possible to the 
condition existing before the damage or taking.

    13.2     TENANT'S RIGHTS. If any portion of the Premises is so taken by 
condemnation, Tenant may elect to terminate this Lease if the portion of the 
Premises taken is of such extent and nature as substantially to handicap, 
impede or permanently impair Tenant's use of the balance of the Premises. 
Tenant must exercise its right to terminate by giving notice to Landlord 
within thirty (30) days after the nature and extent of the taking have been 
finally determined. If Tenant

                                      -24-



elects to terminate this Lease, Tenant shall also notify Landlord of the date 
of termination, which date shall not be earlier than thirty (30) days nor 
later than ninety (90) days after Tenant has notified Landlord of its 
election to terminate, except that this Lease shall terminate on the date of 
taking if the date of taking falls on any date before the date of termination 
designated by Tenant.

    13.3     LEASE TO REMAIN IN EFFECT. If neither Landlord nor Tenant 
terminates this Lease as hereinabove provided, this Lease shall continue in 
full force and effect, except that minimum monthly rental and Tenant's 
Operating Cost Share shall abate to the extent Tenant's use of the Premises 
is impaired for any period that any portion of the Premises is unusable or 
inaccessible because of a casualty or taking hereinabove described. Each 
party waives the provisions of Code of Civil Procedure Section 1265.130, 
allowing either party to petition the Superior Court to terminate this Lease 
in the event of a partial condemnation of the Premises or Property.

    13.4     RESERVATION OF COMPENSATION. Landlord reserves, and Tenant 
waives and assigns to Landlord, all rights to any award or compensation for 
damage to the Premises, Building, Property and the leasehold estate created 
hereby, accruing by reason of any taking in any public improvement, 
condemnation or eminent domain proceeding or in any other manner by exercise 
of the right of eminent domain or of anything lawfully done by public 
authority, except that Tenant shall be entitled to any and all compensation 
or damages paid for or on account of Tenant's moving expenses, trade fixtures, 
equipment and any leasehold improvements in the Premises, the cost of which 
was borne directly by Tenant, but only to the extent of the then remaining 
unamortized value of such improvements computed on a straight-line basis over 
the initial term of this Lease. Tenant covenants to deliver such further 
assignments of the foregoing as Landlord may from time to time request.

    13.5     RESTORATION OF FIXTURES. If Landlord repairs or causes repair of 
the Premises after such damage or taking, Tenant at its sole expense shall 
repair and replace promptly all additions, alterations and improvements and 
all other items installed or paid for by Tenant under this Lease (excluding, 
however, any of Tenant's trade fixtures, equipment and personal property, the 
repair or replacement of which shall be in Tenant's sole discretion, and 
excluding any improvements originally constructed by Landlord under Section 
2.4 and EXHIBIT C) that were damaged or taken, so as to restore the same to a 
condition substantially equal to that which existed immediately prior to the 
damage or taking. Provided that Tenant has maintained in effect the insurance 
required under Section 10.1(c) hereof, Tenant's repair and restoration 
obligation under the preceding sentence in the event of any casualty shall be 
limited to the insurance proceeds available to Tenant with respect to such 
casualty, plus the amount of any applicable deductible under Tenant's 
applicable insurance policy. Tenant shall have the right to make 
modifications to the Premises, fixtures and improvements, subject to the 
prior written approval of Landlord and subject to all other applicable 
provisions of this Lease. In its review of Tenant's plans and specifications, 
Landlord may take into consideration the effect of the proposed modifications 
on the exterior appearance, the structural integrity and the mechanical and 
other operating systems of the Building.

                               14. DEFAULT

    14.1     EVENTS OF DEFAULT.  The occurrence of any of the following shall 
constitute an event of default on the part of Tenant:

             (a)  ABANDONMENT. Abandonment of the Premises. "Abandonment" is
hereby defined to include, but is not limited to, the complete absence by 
Tenant from the Premises for fifteen (15) consecutive days or more while 
there exists an event of default on the part of Tenant under any other 
provision of this Section 14.1 which has not been cured on or before the 
expiration of such fifteen (15) day period. Tenant waives any right Tenant 
may have to notice under Section 1951.3 of the California Civil Code, the 
terms of this subsection (a) being deemed such notice to Tenant as required 
by said Section 1951.3;

             (b)  NONPAYMENT. Failure to pay, when due, any amount payable to 
Landlord hereunder, such failure continuing for a period of five (5) days 
after written notice of such failure; PROVIDED, however, that any such notice 
shall be in lieu of, and not in addition to, any


                                      -25-



notice required under California Code of Civil Procedure Section 1161 ET 
SEQ., as amended from time to time;

             (c)  OTHER OBLIGATIONS. Failure to perform any obligation, 
agreement or covenant under this Lease other than those matters specified in 
subsection (b) hereof, such failure continuing for fifteen (15) days after 
written notice of such failure, or, if such default is curable in nature but 
it is not possible to cure such default within fifteen (15) days, failure to 
commence cure within said fifteen (15) day period and thereafter to proceed 
diligently to complete cure; PROVIDED, however, that any such notice shall be 
in lieu of, and not in addition to, any notice required under California Code 
of Civil Procedure Section 1161 ET SEQ., as amended from time to time;

             (d)  GENERAL ASSIGNMENT. A general assignment by Tenant for the 
benefit of creditors;

             (e)  BANKRUPTCY.  The filing of any voluntary petition in 
bankruptcy by Tenant, of the filing of an involuntary petition by Tenant's 
creditors, which involuntary petition remains undischarged for a period of 
thirty (30) days. In the event that under applicable law the trustee in 
bankruptcy or Tenant has the right to affirm this Lease and continue to 
perform the obligations of Tenant hereunder, such trustee or Tenant shall, in 
such time period as may be permitted by the bankruptcy court having 
jurisdiction, cure all defaults of Tenant hereunder outstanding as of the 
date of the affirmance of this Lease and provide to Landlord such adequate 
assurances as may be necessary to ensure Landlord of the continued 
performance of Tenant's obligations under this Lease. Specifically, but 
without limiting the generality of the foregoing, such adequate assurances 
must include assurances that the Premises continue to be operated only for 
the use permitted hereunder. The provisions hereof are to assure that the 
basic understandings between Landlord and Tenant with respect to Tenant's use 
of the Premises and the benefits to Landlord therefrom are preserved, 
consistent with the purpose and intent of applicable bankruptcy laws;

             (f)  RECEIVERSHIP. The employment of a receiver appointed by 
court to take possession of substantially all of Tenant's assets or the 
Premises, if such receivership remains undissolved for a period of thirty 
(30) days;

             (g)  ATTACHMENT.  The attachment, execution or other judicial 
seizure of all or substantially all of Tenant's assets or the Premises, if 
such attachment or other seizure remains undismissed or undischarged for a 
period of thirty (30) days after the levy thereof;

             (h)  INSOLVENCY.  The admission by Tenant in writing of its 
inability to pay its debts as they become due, the filing by Tenant of a 
petition seeking any reorganization or arrangement, composition, readjustment, 
liquidation, dissolution or similar relief under any present or future 
statute, law or regulation, the filing by Tenant of an answer admitting or 
failing timely to contest a material allegation of a petition filed against 
Tenant in any such proceeding or, if within thirty (30) days after the 
commencement of any proceeding against Tenant seeking any reorganization or 
arrangement, composition, readjustment, liquidation, dissolution or similar 
relief under any present or future statute, law or regulation, such 
proceeding shall not have been dismissed; or

             (i)  CROSS-DEFAULT.  Any default by Tenant under the Phase VI 
Lease, to the extent such default continues beyond any applicable cure 
periods provided in the Phase VI Lease and to the extent Landlord therefore 
has (and exercises concurrently with any termination of this Lease) a right to
terminate the Phase VI Lease; PROVIDED, however, that the default event set 
forth in this Section 14.1(i) shall not apply with respect to any default 
under the Phase VI Lease if, at the time of such default, the holder of the 
lessee's interest under the Phase VI Lease is neither the person or entity 
which is then the holder of the lessee's interest under this Lease nor a 
person or entity which controls, is controlled by or is under common control 
with the person or entity which is then the holder of the lessee's interest 
under this Lease.

    14.2     REMEDIES UPON TENANT'S DEFAULT.

             (a)  Upon the occurrence of any event of default described in 
Section 14.1 hereof, Landlord, in addition to and without prejudice to any 
other rights or remedies it may

                                      -26-



have, shall have the immediate right to re-enter the Premises or any part 
thereof and repossess the same, expelling and removing therefrom all persons and
property (which property may be stored in a public warehouse or elsewhere at 
the cost and risk of and for the account of Tenant), using such force as may be 
necessary to do so (as to which Tenant hereby waives any claim for loss or 
damage that may thereby occur). In addition to or in lieu of such re-entry, 
and without prejudice to any other rights or remedies it may have, Landlord 
shall have the right either (i) to terminate this Lease and recover from 
Tenant all damages incurred by Landlord as a result of Tenant's default, as 
hereinafter provided, or (ii) to continue this Lease in effect and recover 
rent and other charges and amounts as they become due.

              (b)  Even if Tenant has breached this Lease or abandoned the 
Premises, this Lease shall continue in effect for so long as Landlord does 
not terminate Tenant's right to possession under subsection (a) hereof and 
Landlord may enforce all of its rights and remedies under this Lease, 
including the right to recover rent as it becomes due, and Landlord, without 
terminating this Lease, may exercise all of the rights and remedies of a 
lessor under California Civil Code Section 1951.4 (lessor may continue lease 
in effect after lessee's breach and abandonment and recover rent as it 
becomes due, if lessee has right to sublet or assign, subject only to 
reasonable limitations), or any successor Code section. Acts of maintenance, 
preservation or efforts to relet the Premises or the appointment of a 
receiver upon application of Landlord to protect Landlord's interests under 
this Lease shall not constitute a termination of Tenant's right to possession.

              (c)  If Landlord terminates this Lease pursuant to this Section 
14.2, Landlord shall have all of the rights and remedies of a landlord 
provided by Section 1951.2 of the Civil Code of the State of California, or 
any successor Code section, which remedies include Landlord's right to 
recover from Tenant (i) the worth at the time of award of the unpaid rent and 
additional rent which had been earned at the time of termination, (ii) the 
worth at the time of award of the amount by which the unpaid rent and 
additional rent which would have been earned after termination until the time 
of award exceeds the amount of such rental loss that Tenant proves could have 
been reasonably avoided, (iii) the worth at the time of award of the amount 
by which the unpaid rent and additional rent for the balance of the term after 
the time of award exceeds the amount of such rental loss that Tenant proves 
could be reasonably avoided, and (iv) any other amount necessary to 
compensate Landlord for all the detriment proximately caused by Tenant's 
failure to perform its obligations under this Lease or which in the ordinary 
course of things would be likely to result therefrom, including, but not 
limited to, the cost of recovering possession of the Premises, expenses of 
reletting, reasonable attorneys' fees, and other reasonable costs. The "worth 
at the time of award" of the amounts referred to in clauses (i) and (ii) 
above shall be computed by allowing interest at ten percent (10%) per annum 
from the date such amounts accrued to Landlord. The "worth at the time of 
award" of the amounts referred to in clause (iii) above shall be computed by 
discounting such amount at one percentage point above the discount rate of 
the Federal Reserve Bank of San Francisco at the time of award.

              14.3.  REMEDIES CUMULATIVE.  All rights, privileges and elections 
or remedies of Landlord contained in this Article 14 are cumulative and not 
alternative to the extent permitted by law and except as otherwise provided 
herein.

                   15.  SUBORDINATION, ATTORNMENT AND SALE

     15.1.    SUBORDINATION TO MORTGAGE. This Lease, and any sublease entered 
into by Tenant under the provisions of this Lease, shall be subject and 
subordinate to any ground lease, mortgage, deed of trust, sale/leaseback 
transaction or any other hypothecation for security now or hereafter placed 
upon the Building, the Property, or both, and the rights of any assignee of 
Landlord or of any ground lessor, mortgagee, trustee, beneficiary or leaseback 
lessor under any of the foregoing, and to any and all advances made on the 
security thereof and to all renewals, modifications, consolidations, 
replacements and extensions thereof; PROVIDED, however, that such 
subordination in the case of any future ground lease, mortgage, deed of 
trust, sale/leaseback transaction or any other hypothecation for security 
placed upon the Building, the Property, or both shall be conditioned on 
Tenant's receipt from the ground lessor, mortgagee, trustee, beneficiary or 
leaseback lessor of a nondisturbance agreement in a form reasonably acceptable 
to Tenant (and subject only to reasonable limitations), confirming that so 
long as Tenant is not

                                      -27-


in default hereunder, Tenant's rights hereunder shall not be disturbed by 
such person or entity following any foreclosure or other acquisition of the 
Property. Moreover, Tenant's obligations under this Lease shall be 
conditioned on Tenant's receipt, within thirty (30) days after mutual 
execution of this Lease, from Slough Parks Incorporated and from any other 
ground lessor, mortgagee, trustee, beneficiary or leaseback lessor currently 
owning or holding a security interest in the Property, of a nondisturbance 
agreement in a form reasonably acceptable to Tenant (and subject only to 
reasonable limitations), confirming that so long as Tenant is not in default 
hereunder, Tenant's rights hereunder shall not be disturbed by such person or 
entity following any foreclosure or other acquisition of the Property. If any 
mortgagee, trustee, beneficiary, ground lessor, sale/leaseback lessor or 
assignee elects to have this Lease be an encumbrance upon the Property prior 
to the lien of its mortgage, deed of trust, ground lease or leaseback lease 
or other security arrangement and gives notice thereof to Tenant, this Lease 
shall be deemed prior thereto, whether this Lease is dated prior or subsequent 
to the date thereof or the date of recording thereof. Tenant, and any 
sublessee, shall execute such documents as may reasonably be requested by any 
mortgagee, trustee, beneficiary, ground lessor, sale/leaseback lessor or 
assignee to evidence the subordination herein set forth or to make this Lease 
prior to the lien of any mortgage, deed of trust, ground lease, leaseback 
lease or other security arrangement, as the case may be. Upon any default by 
Landlord in the performance of its obligations under any mortgage, deed of 
trust, ground lease, leaseback lease or assignment, Tenant (and any 
sublessee) shall, notwithstanding any subordination hereunder, attorn to the 
mortgagee, trustee, beneficiary, ground lessor, leaseback lessor or assignee 
thereunder upon demand and become the tenant of the successor in interest to 
Landlord, at the option of such successor in interest, and shall execute and 
deliver any instrument or instruments confirming the attornment herein 
provided for.

     15.2.     SALE OF LANDLORD'S INTEREST. Upon sale, transfer or assignment 
of Landlord's entire interest in the Building and Property, Landlord shall be 
relieved of its obligations hereunder with respect to liabilities accruing 
from and after the date of such sale, transfer or assignment; PROVIDED, 
however, that such relief from liabilities (i) shall be effective only if and 
to the extent that the transferee expressly assumes in writing, for the 
benefit of Tenant, Landlord's obligations under this Lease, (ii) shall not 
apply to Landlord's environmental indemnification under Section 9.6(d) hereof 
unless the transferee has, immediately after the transfer, a net worth equal 
to or greater than that of Landlord immediately prior to the transfer, and 
(iii) shall not in any event apply to Landlord's obligations with respect to 
the initial construction of the Building and Common Areas under Section 2.4 
and EXHIBIT C. Moreover, in recognition of Tenant's substantial reliance upon 
Landlord's creditworthiness and development experience with respect to the 
initial construction of the Building and Common Areas, Landlord shall not 
sell, transfer, convey or otherwise dispose of its ownership interest in the 
portion of the Property designated as Phase VII on the Site Plan, or any 
portion thereof, prior to the Commencement Date under Section 2.1 hereof, 
except (x) with Tenant's prior written consent or (y) to an entity of which 
Britannia Hopyard, LLC, or an entity controlling, controlled by or under 
common control with Britannia Hopyard, LLC, is a general partner or has 
management responsibilities and equity participation comparable to those of a 
general partner.

     15.3.     ESTOPPEL CERTIFICATES.  Tenant shall at any time and from time 
to time, within ten (10) days after written request by Landlord, execute, 
acknowledge and deliver to Landlord a certificate in writing stating: (i) 
that this Lease is unmodified and in full force and effect, or if there have 
been any modifications, that this Lease is in full force and effect as 
modified and stating the date and the nature of each modification; (ii) the 
date to which rental and all other sums payable hereunder have been paid; 
(iii) that Landlord is not in default in the performance of any of its 
obligations under this Lease, that Tenant has given no notice of default to 
Landlord and that no event has occurred which, but for the expiration of the 
applicable time period, would constitute an event of default hereunder, or if 
Tenant alleges that any such default, notice or event has occurred, 
specifying the same in reasonable detail; and (iv) such other matters as may 
reasonably be requested by Landlord or any institutional lender, mortgagee, 
trustee, beneficiary, ground lessor, sale/leaseback lessor or prospective 
purchaser of the Property. Any such certificate provided under this Section 
15.3 may be relied upon by any lender, mortgagee, trustee, beneficiary, 
assignee or successor in interest to Landlord, by any prospective purchaser, 
by any purchaser on foreclosure or sale, by any grantee under a deed in lieu 
of foreclosure of any mortgage or deed of trust on the Property or Premises, 
or by any other third party. Failure to execute and return within the 
required time any estoppel certificate requested hereunder shall be

                                     -28-



deemed to be an admission of the truth of the matters set forth in the form 
of certificate submitted to Tenant for execution.

     15.4.     SUBORDINATION TO CC&R's.  This Lease, and any permitted 
sublease entered into by Tenant under the provisions of this Lease, shall be 
subject and subordinate (a) to any declarations of covenants, conditions and 
restrictions affecting the Property from time to time, which may include 
easements, access rights and similar nonexclusive use rights and privileges 
in favor of appropriate third parties, PROVIDED that the terms of such future 
declarations are approved by Tenant in writing; (b) to the Declaration of 
Covenants, Conditions and Restrictions for Hacienda Business Park (No. 2) 
recorded on January 24, 1985 as Instrument No. 85-14396, Alameda County 
Records, as amended from time to time (the "Master Declaration"), the 
provisions of which Master Declaration are an integral part of this Lease; and
(c) to the provisions of the Corporation Grant Deed and Rider recorded on 
June 28, 1996 as Instrument No. 96-158374, which provisions are binding upon 
Tenant as if set forth herein in full. Tenant agrees to execute, upon request 
by Landlord, any documents reasonably required from time to time to evidence 
such subordination.

                               16.  SECURITY

     16.1. DEPOSIT.  Concurrently with Tenant's execution of this Lease, 
Tenant shall deposit with Landlord the sum of Eighty-Seven Thousand Five 
Hundred Dollars ($87,500.00), which sum (the "Security Deposit") shall be 
held by Landlord as security for the faithful performance of all of the 
terms, covenants, and conditions of this Lease to be kept and performed by 
Tenant during the term hereof.  If Tenant defaults with respect to any 
provision of this Lease, including, without limitation, the provisions 
relating to the payment of rental and other sums due hereunder, Landlord 
shall have the right, but shall not be required, to use, apply or retain all 
or any part of the Security Deposit for the payment of rental or any other 
amount which Landlord may spend or become obligated to spend by reason of 
Tenant's default or to compensate Landlord for any other loss or damage which 
Landlord may suffer by reason of Tenant's default.  If any portion of the 
Security Deposit is so used or applied, Tenant shall, within ten (10) days 
after written demand therefor, deposit cash with Landlord in an amount 
sufficient to restore the Security Deposit to its original amount and 
Tenant's failure to do so shall be a material breach of this Lease.  Landlord 
shall not be required to keep any deposit under this Section separate from 
Landlord's general funds, and Tenant shall not be entitled to interest 
thereon.  If Tenant fully and faithfully performs every provision of this 
Lease to be performed by it, the Security Deposit, or any balance thereof, 
shall be returned to Tenant or, at Landlord's option, to the last assignee of 
Tenant's interest hereunder, at the expiration of the term of this Lease and 
after Tenant has vacated the Premises.  In the event of termination of 
Landlord's interest in this Lease, Landlord shall transfer all deposits then 
held by Landlord under this Section to Landlord's successor in interest, 
whereupon Tenant agrees to release Landlord from all liability for the return 
of such deposit or the accounting thereof.

                               17.  MISCELLANEOUS

     17.1. NOTICES.  All notices, consents, waivers and other communications 
which this Lease requires or permits either party to give to the other shall 
be in writing and shall be deemed given when delivered personally (including 
delivery by private courier or express delivery service) or four (4) days 
after deposit in the United States mail, registered or certified mail, 
postage prepaid, addressed to the parties at their respective addresses as 
follows:

     To Tenant:       ProBusiness Services, Inc.
                      4125 Hopyard Road
                      Pleasanton, CA  94588
                      Attn: Mitch Everton, Senior Vice President

     with copy to:    Lisa Barton Armando, Esq.
                      Wise & Shepard LLP
                      3030 Hansen Way, Suite 100
                      Palo Alto, CA  94304


                                     -29-


    To Landlord:   Britannia Hacienda V Limited Partnership
                   1939 Harrison Street, Suite 412
                   Park Plaza Building
                   Oakland, CA 94612
                   Attn: T. J. Bristow

    with copy to:  Folger Levin & Kahn LLP
                   Embarcadero Center West
                   275 Battery Street, 23rd Floor
                   San Francisco, CA 94111
                   Attn: Donald E. Kelley, Jr.

or to such other address as may be contained in a notice at least fifteen 
(15) days prior to the address change from either party to the other given 
pursuant to this Section. Rental payments and other sums required by this 
Lease to be paid by Tenant shall be delivered to Landlord at Landlord's 
address provided in this Section, or to such other address as Landlord may 
from time to time specify in writing to Tenant, and shall be deemed to be 
paid only upon actual receipt.

    17.2.    SUCCESSORS AND ASSIGNS.  The obligations of this Lease shall run 
with the land, and this Lease shall be binding upon and inure to the benefit of 
the parties hereto and their respective successors and assigns, except that, 
subject to the provisions of Section 15.2 hereof, the original Landlord named 
herein and each successive Landlord under this Lease shall be liable only for 
obligations accruing during the period of its ownership of the Property, said 
liability terminating upon the termination of such ownership and passing to 
the successor lessor.

    17.3.    NO WAIVER.  The failure of Landlord to seek redress for 
violation, or to insist upon the strict performance, of any covenant or 
condition of this Lease shall not be deemed a waiver of such violation, or 
prevent a subsequent act which would originally have constituted a violation 
from having all the force and effect of an original violation.

    17.4.    SEVERABILITY.  If any provision of this Lease or the application 
thereof is held to be invalid or unenforceable, the remainder of this Lease 
or the application of such provision to persons or circumstances other than 
those as to which it is invalid or unenforceable shall not be affected thereby, 
and each of the provisions of this Lease shall be valid and enforceable, 
unless enforcement of this Lease as so invalidated would be unreasonable or 
grossly inequitable under all the circumstances or would materially frustrate 
the purposes of this Lease.

    17.5.     LITIGATION BETWEEN PARTIES.  In the event of any litigation or 
other dispute resolution proceedings between the parties hereto arising out 
of or in connection with this Lease, the prevailing party shall be reimbursed 
for all reasonable costs, including, but not limited to, reasonable 
accountants' fees and attorneys' fees, incurred in connection with such 
proceedings (including, but not limited to, any appellate proceedings 
relating thereto) or in connection with the enforcement of any judgment or 
award rendered in such proceedings. "Prevailing party" within the meaning of 
this Section shall include, without limitation, a party who dismisses an 
action for recovery hereunder in exchange for payment of the sums allegedly 
due, performance of covenants allegedly breached or consideration 
substantially equal to the relief sought in the action.

    17.6.     SURRENDER.  A voluntary or other surrender of this Lease by 
Tenant, or a mutual termination thereof between Landlord and Tenant, shall not 
result in a merger but shall, at the option of the Landlord, operate either 
as an assignment to Landlord of any and all existing subleases and 
subtenancies, or a termination of all or any existing subleases and 
subtenancies. This provision shall be contained in any and all assignments or 
subleases made pursuant to this Lease.

    17.7.     INTERPRETATION.  The provisions of this Lease shall be construed 
as a whole, according to their common meaning, and not strictly for or against 
Landlord or Tenant. The captions preceding the text of each Section and 
subsection hereof are included only for convenience of reference and shall be 
disregarded in the construction or interpretation of this Lease.


                                     -30-


    17.8.    ENTIRE AGREEMENT.  This written Lease, together with the 
exhibits hereto, contains all the representations and the entire 
understanding between the parties hereto with respect to the subject matter 
hereof. Any prior correspondence, memoranda or agreements are replaced in 
total by this Lease and the exhibits hereto. This Lease may be modified only 
by an agreement in writing signed by each of the parties.

    17.9.    GOVERNING LAW.  This Lease and all exhibits hereto shall be 
construed and interpreted in accordance with and be governed by all the 
provisions of the laws of the State of California.

    17.10.   NO PARTNERSHIP.  The relationship between Landlord and Tenant is 
solely that of a lessor and lessee. Nothing contained in this Lease shall be 
construed as creating any type or manner of partnership, joint venture or 
joint enterprise with or between Landlord and Tenant.

    17.11.   FINANCIAL INFORMATION.  From time to time Tenant shall promptly 
provide directly to prospective lenders and purchasers of the Property 
designated by Landlord such financial information pertaining to the financial 
status of Tenant as Landlord may reasonably request; PROVIDED, Tenant shall 
be permitted to provide such financial information in a manner which Tenant 
deems reasonably necessary to protect the confidentiality of such 
information, including (if Tenant so requests) conditioning disclosure of 
such information upon execution of a reasonable confidentiality agreement by 
Landlord and by any other proposed or permitted recipient of such information; 
and PROVIDED FURTHER, that if Tenant is then a publicly traded company filing 
periodic reports under the Securities Act of 1934, as amended, and the 
regulations thereunder, Tenant shall be required to furnish copies of 
Tenant's most recent Form 10K, 10Q and 8K (if any) reports and shall not be 
required to disclose any nonpublic financial information pursuant to this 
Section 17.11. In addition, from time to time, Tenant shall provide Landlord 
with such financial information pertaining to the financial status of Tenant 
as Landlord may reasonably request, subject to the final proviso of the 
immediately preceding sentence. Landlord agrees that all financial 
information supplied to Landlord by Tenant shall be treated as confidential 
material, and shall not be disseminated to any party or entity (including 
any entity affiliated with Landlord) without Tenant's prior written consent. 
For purposes of this Section, without limiting the generality of the 
obligations provided herein, it shall be deemed reasonable for Landlord to 
request (and sufficient for Tenant to provide) copies of (i) Tenant's most 
recent audited annual financial statements, or, if audited statements have 
not been prepared, unaudited financial statements for Tenant's most recent 
fiscal year, and (ii) Tenant's unaudited financial statements for Tenant's 
most recent fiscal quarter, all of which unaudited statements shall be 
accompanied by a certificate of Tenant's chief financial officer as to the 
accuracy of such unaudited statements.

             Landlord and Tenant recognize the need of Tenant to maintain the 
confidentiality of information regarding its financial status and the need of 
Landlord to be informed of, and to provide to prospective lenders and 
purchasers of the Premises financial information pertaining to, Tenant's 
financial status. Landlord and Tenant agree to cooperate with each other in 
achieving these needs within the context of the obligations set forth in this 
Section.

    17.12.    [Omitted.]

    17.13.    TIME.  Time is of the essence of this Lease, and of every term 
and condition hereof.

    17.14.    RULES AND REGULATIONS.  Tenant shall observe, comply with and 
obey, and shall cause its employees, agents and, to the best of Tenant's 
ability, invitees to observe, comply with and obey such rules and regulations 
as Landlord may promulgate from time to time for the safety, care, 
cleanliness, order and use of the Premises, the Building and the Property, 
PROVIDED that any such rules and regulations promulgated after the date of 
this Lease shall not materially and adversely affect Tenant's rights under 
this Lease.

    17.15.    BROKERS.  Landlord agrees to pay a brokerage commission to 
Colliers Parrish International, Inc. and to Cornish & Carey Commercial in 
connection with the consummation of this Lease, in accordance with a separate 
agreement between Landlord and such brokers. Tenant represents and warrants 
that no other broker participated in the consummation of this Lease and 
agrees to indemnify, defend and hold Landlord harmless against any liability, 
cost or expense,

                                     -31-


including, without limitation, reasonable attorneys' fees, arising out of any 
claims for brokerage commissions or other similar compensation in connection 
with any conversations, prior negotiations or other dealings by Tenant with 
any other broker.

    17.16.    MEMORANDUM OF LEASE.  At any time during the term of this Lease, 
either party, at its sole expense, shall be entitled to record a memorandum of
this Lease and, if either party so elects, both parties agree to cooperate in 
the preparation, execution, acknowledgement and recordation of such document 
in reasonable form.

    17.17.    CORPORATE AUTHORITY.  The person signing this Lease on behalf of 
Tenant warrants that he or she is fully authorized to do so and, by so doing, 
to bind Tenant. As evidence of such authority, Tenant shall deliver to 
Landlord, upon or prior to execution of this Lease, a certified copy of a 
resolution of Tenant's board of directors authorizing the execution of this 
Lease and naming the officer that is authorized to execute this Lease on 
behalf of Tenant.

    17.18.    EXECUTION AND DELIVERY.  Submission of this Lease for 
examination or signature by Tenant does not constitute an agreement or 
reservation of or option for lease of the Premises. This instrument shall not 
be effective or binding upon either party, as a lease or otherwise, until 
executed and delivered by both Landlord and Tenant. This Lease may be executed 
in one or more counterparts and by separate parties on separate counterparts, 
but each counterpart shall constitute an original and all such counterparts 
together shall constitute one and the same instrument.

    17.19.    [Omitted.]

    17.20.    SURVIVAL.  Without limiting survival provisions which would 
otherwise be implied or construed under applicable law or which are otherwise 
explicitly set forth herein, the provisions of Sections 2.6, 5.4, 7.2, 7.3, 
7.4, 9.6, 10.6, 13.4 and 17.5 hereof shall survive the termination of this 
Lease with respect to matters occurring prior to the expiration of this Lease.

    17.21.     CONSENTS.  Whenever the approval or consent of a party is 
required to be obtained under any provision of this Lease as a condition or 
prerequisite to the taking of any action or effectiveness of any action by 
the other party, then such approval or consent shall not be unreasonably 
withheld, delayed or conditioned, regardless of whether or not such 
reasonableness requirement is expressly stated in the applicable provision of 
this Lease.

    17.22.    LANDLORD DEFAULTS.  If Landlord fails to perform any 
obligation, agreement or covenant under this Lease which relates 
specifically to the Premises and does not materially affect other tenants of 
the Property (such as, by the way of example and not limitation, Landlord's 
obligation to maintain the roof, exterior walls and other structural portions 
of the Building), and if such failure continues for fifteen (15) days after 
written notice of such failure is given by Tenant or Landlord or, if such 
default is curable in nature but it is not possible to cure such default within 
fifteen (15) days, Landlord fails to commence cure within such fifteen (15) 
day period or thereafter fails to proceed diligently to complete cure, then 
Tenant shall have the right to perform such obligation or cure such default 
of Landlord, and Landlord shall reimburse Tenant for the reasonable cost 
thereof, together with interest at the rate specified in the first sentence 
of Section 3.2 hereof from the date of payment by Tenant to the date of 
reimbursement by Landlord, within fifteen (15) days after written notice from 
Tenant of the completion and cost of such cure, accompanied by copies of 
invoices or other supporting documentation. Under no circumstances, however, 
shall Tenant have any right to offset the cost of any such cure against rent 
or other charges falling due from time to time under this Lease.


                  [rest of page intentionally left blank]


                                     -32-


    IN WITNESS WHEREOF, the parties hereto have executed this Lease as of the 
day and year first set forth above.


         "Landlord"                               "Tenant"

BRITANNIA HACIENDA V LIMITED             PROBUSINESS SERVICES, INC., a 
PARTNERSHIP, a  Delaware limited         Delaware corporation
partnership

By:  BRITANNIA HOPYARD, LLC, a            By:         [ILLEGIBLE] 
     California limited liability             -----------------------------
     company, General Partner             Its:         President           
                                               ----------------------------
                                                                           
     By: /s/ T. J. Bristow                By:         [ILLEGIBLE] 
         -----------------------              -----------------------------
         T. J. Bristow                    Its:            SVP              
         Manager & President                   ----------------------------


                                     -33-


                                   EXHIBITS

             
EXHIBIT A       Real Property Description

EXHIBIT B       Site Plan

EXHIBIT C       Construction
                C-1: Building Shell Specifications

EXHIBIT D       Acknowledgement of Lease Commencement


                                       
                                   EXHIBIT A
  
                         REAL PROPERTY DESCRIPTION

PARCEL ONE:

Lot 14A of Amended Parcel Map No. 4571, filed November 23, 1987, in Book 172 
of Maps, Pages 81 and 82, Alameda County Records.

PARCEL TWO:

Non-exclusive easements, appurtenant to Parcel One above, for the purpose of 
vehicular (including trucks of all sizes) and pedestrian ingress and egress 
over, along and across all that portion of Lot 14B as shown on said Parcel 
Map No. 4517 lying within the lines of that certain "Community Driveway 
Easement" depicted in said Parcel Map No. 4517, as the grant of such easement 
was confirmed unto The Prudential Insurance Company of America, a New Jersey 
corporation, pursuant to that certain "Grant of Easement and Maintenance 
Agreement" dated July 30, 1985, recorded July 30, 1985, as Series No. 
85-150156, Official Records of Alameda County.



                                   SITE PLAN

                                    [MAP]




                                       
                                    EXHIBIT B
                            TO BUILD-TO-SUIT LEASE




                                  EXHIBIT C

                                CONSTRUCTION


1.  Landlord, at its sole cost and expense (except as may otherwise be 
expressly agreed in writing between Landlord and Tenant at any time 
hereafter, and subject to the rental adjustment provisions hereinafter set 
forth), using architects and contractors selected by Landlord in its sole 
discretion (except that API or another architect selected by Tenant and 
approved by Landlord ("Tenant's Architect") shall provide architectural 
services with respect to the interior improvements to be constructed by 
Landlord in the Building), shall undertake and diligently complete, subject 
to delays for causes beyond its reasonable control (excluding financial 
inability), (a) a one-story concrete tilt-up building shell of approximately 
70,425 square feet (the "Building Shell"), meeting the specifications set 
forth in EXHIBIT C-1 attached hereto and incorporated herein by this 
reference (which are the same specifications applicable to the buildings 
already constructed by Landlord on Phase V of the Property), (b) interior 
tenant improvements (the "Interior Improvements") in accordance with plans 
and specifications to be developed by Tenant's Architect and approved by 
Landlord's architect following mutual execution of this Lease and to be 
subject to mutual written approval by Landlord and Tenant, which approval 
shall not be unreasonably withheld or delayed (the "Approved Interior Plans 
and Specifications"), and (c) landscaping, sidewalks, parking and driveway 
areas and other Common Area improvements within the boundaries of Phase VII, 
similar to those already constructed by Landlord on Phase V, as shown on the 
Site Plan and/or on such Approved Plans and Specifications (the "Common Area 
Improvements"), all such work being referred to herein collectively as 
"Landlord's Work." Notwithstanding the references in the preceding sentence 
to the Phase V building shell standards and the Phase V common area 
improvements, the Phase VII Building Shell and Common Area Improvements shall 
also incorporate and conform to any code changes adopted by the City of 
Pleasanton since the Phase V building shells and common area improvements 
were completed. Concurrently with the development and approval of the 
Approved Interior Plans and Specifications, Landlord shall develop, subject 
to mutual written approval by Landlord and Tenant, a Construction Timeline in 
a level of detail comparable to that used in the construction timeline under 
the Phase VI Lease, setting forth pertinent milestones and deadlines to be 
met by the parties in connection with the design and construction of the 
Building Shell, the Interior Improvements and the Common Area Improvements. 
Without limiting the generality of the foregoing, the Construction Timeline 
shall include or accommodate the following: Landlord shall provide Tenant's 
Architect with preliminary base building plans as soon as reasonably 
practical; Tenant's Architect shall have the opportunity to provide Tenant's 
requests for initial locations, specifications and quantities of Interior 
Improvements as specified in EXHIBIT C-1, to include, but not be limited to, 
toilet cores, HVAC system, Building exhaust system, specialty items, etc., to 
Landlord prior to final Building Shell design; and Landlord's architect for 
the Building Shell design shall use reasonable efforts to adapt, include and 
accommodate Tenant's requests with respect to such items and Tenant's 
proposed Interior Improvements in the Building Shell design, plans and 
specifications, subject to structural and code constraints and other 
reasonable design requirements. Landlord and Tenant shall use their 
respective commercially reasonable efforts, diligence and good faith to 
develop, review and approve the Approved Interior Plans and Specifications 
and Construction Timeline contemplated above, and all further working 
drawings and/or final drawings necessary to implement the same as 
contemplated below, as promptly as reasonably possible following mutual 
execution of this Lease, and in all events within a time period which leaves 
Landlord a reasonable period of time to complete the permitting and 
construction of the Building Shell, Interior Improvements and Common Area 
Improvements prior to July 1, 1999. For purposes of this EXHIBIT C, Tenant 
shall be provided at least 10 business days under this EXHIBIT C and in the 
Construction Timeline to approve or give reasons for its disapproval of any 
plans or specifications or Construction Timelines submitted to Tenant for 
Tenant's approval.

2.  The Interior Improvements shall be constructed in two phases, an initial 
phase of approximately (but not less than) 35,000 square feet (intended for 
delivery on or about July 1, 1999) and a second phase of approximately 35,000 
feet (intended for delivery on or about July 1, 2000); PROVIDED, however, 
that the respective sizes of the first and second phases and the delivery 
date for the second phase may be modified by mutual written agreement of 
Landlord and 
                                       
                           EXHIBIT C (Page 1 of 5)


Tenant, so long as the first phase contains not less than 35,000 square feet. 
The portions of the Interior Improvements to be completed as part of each 
phase shall be subject to mutual approval by Landlord and Tenant, and the 
working drawings and final plans and specifications that will be necessary 
for actual construction of each phase of the Interior Improvements shall be 
prepared by Tenant's Architect on the basis of the Approved Interior Plans 
and Specifications and on the basis of such agreed phasing of the Interior 
Improvements, with all material changes from the Approved Interior Plans and 
Specifications to be subject to mutual approval by Landlord and Tenant, such 
approval not to be unreasonably withheld, delayed or conditioned by either 
party; PROVIDED, however, that any changes required from time to time in the 
Approved Interior Plans and Specifications, in the working drawings and/or in 
the final plans and specifications as a result of applicable law or 
governmental requirements, or at the insistence of any other third party 
whose approval may be required with respect to the Building Shell, Interior 
Improvements or Common Area Improvements, or as a result of unanticipated 
conditions encountered in the course of construction, may be implemented by 
Landlord after prior written notice to Tenant, but shall not require Tenant's 
approval or consent (although Landlord agrees to give reasonable 
consideration to Tenant's views regarding functional characteristics of any 
such required changes). Without limiting the generality of the foregoing 
procedures, Landlord agrees that Tenant shall in all events have the 
opportunity to work (and have its engineers and consultants work) with 
Landlord to develop, review and approve all design aspects and specifications 
for the electrical and HVAC systems in the Building, to ensure that the 
zones, loading, distribution, capacity and other features of such systems are 
adequate for Tenant's anticipated needs.

3.  Landlord's Work shall be performed in a neat and workmanlike manner and 
shall conform to all applicable governmental codes, laws and regulations in 
force at the time such work is completed, and otherwise in accordance with 
Section 2.4 of the Lease. Landlord shall use its best reasonable efforts to 
complete Landlord's Work within the time periods set forth in the 
Construction Timeline to be mutually approved by Landlord and Tenant as 
contemplated above, as such timeline may be modified from time to time by 
mutual agreement of Landlord and Tenant, and subject to the effects of any 
Tenant Delays or any other circumstances beyond Landlord's reasonable control 
(excluding financial inability).

4.  The cost of construction of the Building Shell and Common Area 
Improvements shall be Landlord's sole responsibility and expense, including 
any costs or cost increases incurred as a result of unavoidable delays, 
governmental requirements or unanticipated conditions; PROVIDED, however, 
that to the extent the cost of any item or component of such work is 
increased as a result of any Tenant Delays or as a result of any changes 
requested by Tenant (PROVIDED that such additional cost was identified to 
Tenant and approved by Tenant as part of Tenant's approval of the applicable 
Change Order, as provided below), or as a result of any other plan changes or 
compliance costs attributable to Tenant's particular use requirements, the 
amount of such increase in the cost of Landlord's Work shall be Tenant's 
responsibility, shall constitute an "excess improvement cost" and, as such, 
shall be payable in cash by Tenant or result in a rental adjustment in 
accordance with Section 3.1(d) of the Lease in the same manner provided for 
"excess improvement costs" in the next paragraph of this EXHIBIT C. For 
purposes of this EXHIBIT C, "Tenant Delay" shall mean (x) any delay resulting 
from Tenant's failure to furnish within the time period reasonably specified 
by Landlord or its architect or contractor, as applicable, any information 
requested by Landlord or its architect or contractor in connection with the 
design or construction of the improvements, or from Tenant's failure to 
approve, within the time period reasonably specified by Landlord or its 
architect or contractor, as applicable, any matters requiring approval by 
Tenant, PROVIDED that in no case shall the time period specified for any such 
information or approval, for purposes of this definition of Tenant Delay, be 
less than ten (10) business days; (y) any delay resulting from changes 
requested by Tenant, including any delay resulting from the need to revise 
any drawings or obtain further governmental approvals as a result of any such 
changes, following mutual approval of the Approved Interior Plans and 
Specifications, PROVIDED that such delay was identified to Tenant and 
approved by Tenant as part of Tenant's approval of the applicable Change 
Order (as provided below); and/or (z) any delay of any other kind or nature 
caused by Tenant or its contractors, agents or employees, PROVIDED  that no 
such delay period under this clause (z) shall begin to run until Tenant has 
first been given written notice by Landlord or its architect or contractor, 
as applicable, of the behavior, inaction or other circumstances constituting 
the alleged delay and has failed to correct such behavior,

                           EXHIBIT C (Page 2 of 5)

inaction or other circumstances within two (2) business days after Tenant's 
receipt of such written notice.

5.  Once the Building Shell Plans and Specifications and the Approved 
Interior Plans and Specifications have been completed, Landlord shall engage 
a general contractor (the "Building Contractor") to construct the Building 
Shell, the Interior Improvements and the Common Area Improvements. Landlord 
shall require that the Building Contractor competitively bid the Interior 
Improvements work for each trade to at least three (3) subcontractors. Prior 
to commencement of the bidding process for each respective trade, Landlord 
shall provide Tenant with a preapproved subcontractor list and with 
reasonable minimal qualifications applicable to such subcontractors and to 
any other subcontractors whom Tenant may wish to propose. Within five (5) 
business days after receipt of such list from Landlord, Tenant at its sole 
option shall have the right to submit in writing to Landlord the name, 
professional experience and other qualifications of any other properly 
licensed subcontractor(s) whom Tenant wishes to have included in the bidding 
process, and Landlord shall include in the bidding process at least one such 
additional subcontractor proposed by Tenant for each trade, subject to the 
following limitations: Landlord shall have the right to require reasonable 
minimum qualifications and appropriate licensing from each such 
subcontractor, provided that such qualifications are applied on a 
nondiscriminatory basis to all proposed subcontractors in the applicable 
trade, and shall have the right to approve or disapprove Tenant's proposed 
subcontractors, which approval shall not be unreasonably denied, conditioned 
or delayed. If Landlord reasonably disapproves any subcontractors proposed by 
Tenant, Landlord's written notice of such disapproval shall specify the 
reasons for disapproval and Tenant shall have the right to replace the 
disapproved subcontractor with the name of an additional subcontractor (with 
appropriate supporting information) for Landlord's review. Tenant and its 
architect and consultants shall have the right to review and comment on all 
trade bids on an "open book" basis, and to work with Landlord in selecting 
all trade subcontractors for the Interior Improvements. To facilitate 
reasonable comparison of bids for subcontractor selection and reasonable 
final accounting for construction costs as provided in Paragraph 9 below, 
Landlord shall use its best efforts to cause all bids to include all 
reasonably anticipated cost categories in reasonable detail and in line item 
format. Although Landlord shall give reasonable consideration to the views of 
Tenant and its architect and consultants with respect to subcontractor 
selection and bid approvals, the final selection of all trade subcontractors 
and approval of bids shall be made solely by Landlord in its reasonable 
discretion, taking into account the lowest bids, the best expected 
performance value, subcontractor qualifications and experience and other 
pertinent factors. Landlord shall submit a copy of the final prices for the 
Interior Improvements, including all design fees, permitting costs and other 
soft costs (including architectural fees of Tenant's Architect) to Tenant for 
approval. Tenant shall have the right within five (5) days after receipt of 
such final prices to notify Landlord in writing that Tenant wishes to make 
reasonable revisions in the design of the Interior Improvements, in which 
event Tenant's Architect shall have ten (10) days after Tenant's receipt of 
Landlord's final prices for the Interior Improvements to make revisions to 
the Approved Interior Plans and Specifications for review and approval by 
Landlord and for revised line item bidding by affected subcontractors. 
Following approval of such revised plans by Landlord and receipt of revised 
bids from subcontractors, Landlord shall resubmit a copy of the revised final 
prices for the Interior Improvements to Tenant for approval. Subject to the 
procedure set forth in the preceding two sentences (which shall not be 
construed as a Tenant Delay, so long as such procedure is pursued by Tenant 
in good faith and with reasonable diligence), Tenant shall approve the final 
prices for the Interior Improvements, or give specific reasons for 
disapproval, within ten (10) days after Landlord's submission of such final 
prices to Tenant. Tenant's failure to respond within such time period shall 
be deemed to constitute Tenant's approval of such prices. Such pricing, as 
approved by Tenant (or deemed approved), shall be referred to as the "Final 
Pricing."

6.   If, after the Final Pricing has been approved, Tenant requests any 
change or addition to the Interior Improvements, Landlord shall notify Tenant 
of the anticipated increase or reduction in expenses attributable to such 
change or addition (along with a description of the additional time or time 
savings anticipated to result from implementing such change or addition) and 
if Tenant approves of such increased or reduced expense and time, Tenant 
shall sign a written change order confirming Tenant's agreement to such 
additional or reduced expense and time (a "Change Order"). Tenant shall be 
responsible for any additional expense incurred in connection with such a 
Change Order, as provided below, and shall be entitled to the benefit of any 
cost

                           EXHIBIT C (Page 3 of 5)


savings in the sense that the amounts thus saved shall be available for use 
elsewhere in the construction of improvements as provided in Section 2.4 and 
this EXHIBIT C.

7.   The rent structure set forth in the Lease is predicated upon a tenant 
improvement allowance of Thirty-Seven and 50/100 Dollars ($37.50) per square 
foot, or Two Million Six Hundred Forty Thousand Nine Hundred Thirty-Seven and 
50/100 Dollars ($2,640,937.50) in the aggregate for a 70,425 square foot 
building, for the Interior Improvements, including restrooms and HVAC system; 
such tenant improvement allowance may also be used by Tenant for installation 
of cabling, a generator, refurbishment to the building presently occupied by 
Tenant on Phase VI pursuant to the Phase VI Lease, and any other tangible 
improvements that are added to, enhance and become a part of such building or 
of the Building hereunder, PROVIDED, however, that under no circumstances may 
more than Five and No/100 Dollars ($5.00) per square foot of such allowance 
(Three Hundred Fifty-Two Thousand One Hundred Twenty-Five and No/100 Dollars 
($352,125.00) for a 70,425 square foot building) be used for refurbishment or 
improvements to the Phase VI building. To the extent Landlord's aggregate 
direct costs of leasing and construction of the Interior Improvements 
(including, but not limited to, payments to contractors or subcontractors for 
labor, materials and profits or overhead, permit fees and charges, plan check 
fees, testing and inspection costs, sales and use taxes, costs of power, 
water and other utilities and of collection and removal of debris, 
architects', engineers/ and other consulting and professional fees, and all 
other related costs incurred in connection with the design and construction 
of such work) and/or of any other items to which Tenant elects to apply the 
tenant improvement allowance under the preceding sentence of this paragraph 
(collectively, "Interior Improvement Costs") exceeds the maximum amount of 
the tenant improvement allowance (after taking into account any cost savings 
resulting from Change Orders approved by Tenant with respect to the Interior 
Improvements, as contemplated above), such excess shall constitute "excess 
improvement costs" that shall be paid by Tenant to Landlord in cash within 
thirty (30) days after substantial completion of Landlord's Work hereunder 
or, at Tenant's election, may instead result in a rental adjustment in 
accordance with Section 3.1(d) of the Lease; PROVIDED, however, that under no 
circumstances shall the aggregate amount of "excess improvement costs" 
eligible for treatment as a rental adjustment in accordance with Section 
3.1(d) of the Lease exceed Five and No/100 Dollars ($5.00) per square foot 
contained in the Premises, or Three Hundred Fifty-Two Thousand One Hundred 
Twenty-Five and No/100 Dollars ($352,125.00) for a 70,425 square foot 
Building. Notwithstanding any other provisions of this Paragraph 7, however, 
Tenant shall have no liability for "excess improvement costs" or for any 
portion of the Interior Improvement Costs (as defined below) except to the 
extent such costs (i) were part of the Final Pricing approved by Tenant, (ii) 
are attributable to plan changes or compliance costs attributable to Tenant's 
particular use requirements and are requested by or approved by Tenant (which 
approval shall not be unreasonably withheld), (iii) are attributable to 
Change Orders approved by Tenant in accordance with Paragraph 6 above (but 
only to the extent such costs were approved by Tenant as part of the approval 
procedure for such Change Orders as contemplated in Paragraph 6), or (iv) are 
attributable to any Tenant Delay (PROVIDED that any such delay attributable 
to a Change Order requested and approved by Tenant shall constitute a Tenant 
Delay only to the extent such delay was approved by Tenant as part of the 
approval procedure for such Change Order as contemplated in Paragraph 6 
above).

8.   Recognizing that the Interior Improvements will be completed in two 
separate phases, the parties agree that the determination of Interior 
Improvement Costs (as contemplated in Paragraph 9 below) and of "excess 
improvement costs" under Paragraph 7 above shall be made initially on an 
interim basis for the first phase of such Interior Improvements, based solely 
on the square footage of such first phase; to the extent it is thereby 
determined that there are any such "excess improvement costs" for the first 
phase of Interior Improvements (I.E., Interior Improvement Costs in excess of 
$37.50 per square foot times the square footage of such first phase), 
notwithstanding any other provisions of the Lease (and in lieu of any rental 
adjustment under Section 3.1(d) of the Lease and/or any additional cash 
payment under Paragraph 7 hereof with respect to the first phase of Interior 
Improvements), Tenant shall pay to Landlord as additional rent, for each 
month or partial month during the period beginning on the Commencement Date 
and ending on the date the square footage of the second phase of Interior 
Improvements is first taken into account under Section 3.1(c) of the Lease in 
determining Tenant's minimum monthly rental obligations under Section 3.1(a) 
of the Lease, an amount equal to the amount of such "excess improvement 
costs" for the first phase of Interior Improvements

                           EXHIBIT C (Page 4 of 5)



times 0.833% per month (equivalent to an annualized imputed interest rate of 
10% per annum). Following completion of the second phase of Interior 
Improvements, the Interior Improvement Costs and "excess improvement costs" 
shall be redetermined in accordance with Paragraphs 7 and 9 hereof on an 
aggregate basis reflecting the cost results for both the first and the second 
phases of the Interior Improvements, and such redetermination shall be the 
basis for determining the amount of the ongoing rental adjustment (if any) 
that will apply under Section 3.1(d) of the Lease (which rental adjustment, 
if any, shall become effective beginning on the date the square footage of 
the second phase of Interior Improvements is first taken into account under 
Section 3.1(c) of the Lease in determining Tenant's minimum monthly rental 
obligations under Section 3.1(a) of the Lease), and the amount of the 
additional cash payment (if any) that will be due from Tenant under Paragraph 
7 hereof, with respect to the construction of the Interior Improvements as a 
whole. To the extent Tenant elects to apply any of the permitted portion of 
the tenant improvement allowance on refurbishment of or improvements to the 
Phase VI building as contemplated above, the amounts expended for that 
purpose shall be deemed to be part of the direct costs and Interior 
Improvement Costs for the first phase to the extent such expenditures occur 
prior to substantial completion of the first phase of the Interior 
Improvements, and shall be deemed to be part of the direct costs and Interior 
Improvement Costs for the second phase to the extent such expenditures occur 
after substantial completion of the first phase of the Interior Improvements.

9.   Within fifteen (15) days after substantial completion of Landlord's 
Work, as defined above, or as soon after such fifteen (15) day period as 
reasonably practicable, Landlord shall deliver to Tenant a statement of Final 
Accounting for Interior Improvement Construction Costs (the "Final 
Accounting"), prepared by Landlord from Landlord's books and records and 
other reasonable sources, which statement shall include all Interior 
Improvement Costs as defined above and shall be final and binding on Landlord 
and Tenant, except as otherwise provided herein. Notwithstanding any other 
provisions of this Paragraph 9, Tenant shall have the right to audit or 
review, directly or through its designated representative, all books and 
records of Landlord reasonably related to the Interior Improvement Costs as 
identified in the Final Accounting, subject to the following conditions: Such 
right shall be exercisable only by written request to Landlord within ten 
(10) days after Tenant's receipt from Landlord of the Final Accounting, and 
shall be exercisable only during normal business hours, on not less than ten 
(10) days prior written notice to Landlord, at such place as Landlord may 
reasonably designate; each party shall bear its own costs and expenses in 
connection with such audit or review. To the extent Tenant, following any 
such review or audit, disputes any item in the applicable statement, Tenant 
shall give Landlord written notice of the disputed items, in reasonable 
detail and with reasonable supporting information, and Landlord and Tenant 
shall negotiate diligently and in good faith to try to resolve the dispute. 
If Landlord and Tenant are unable to resolve the dispute within thirty (30) 
days after Landlord's receipt of Tenant's written notice specifying the 
disputed items, then either party may elect, by written notice to the other, 
to have the dispute resolved and the disputed items of Interior Improvement 
Costs determined in accordance with the procedure set forth in Section 5.4 of 
the Lease.

10.  Landlord, Tenant and their respective agents shall use commercially 
reasonable efforts, diligence and good faith to minimize all costs and 
expenses of Landlord's Work.

Attachment to EXHIBIT C:

     C-1: Building Shell Specifications


                           EXHIBIT C (Page 5 of 5)



                                   EXHIBIT D

                      ACKNOWLEDGEMENT OF LEASE COMMENCEMENT

     This Acknowledgement is executed as of ______________, 1999, by 
BRITANNIA HACIENDA V LIMITED PARTNERSHIP, a Delaware limited partnership 
("Landlord"), and PROBUSINESS SERVICES, INC., a California corporation 
("Tenant"), pursuant to Section 2.5 of the Lease dated January __, 1998 
between Landlord and Tenant (the "Lease") covering premises located at 
___________________, Pleasanton, CA 94588 (the "Premises").

     Landlord and Tenant hereby acknowledge and agree as follows:

     1. The Commencement Date under the Lease is ___________, 1999.

     2. The termination date under the Lease shall be ____________, 2010, 
subject to any applicable provisions of the Lease for extension or early 
termination thereof.

     3. The agreed square footage of the Building, as built, is ________ 
square feet; the agreed square footage of the portion of the Premises 
initially occupied by Tenant as of the Commencement Date is _________ square 
feet.

     4. Tenant accepts the Premises and acknowledges the satisfactory 
completion of all improvements therein required to be made by Landlord, 
subject only to any applicable "punch list" or similar procedures 
specifically provided under the Lease.

     5. The excess cost of improvements (if any) for which Tenant is 
responsible under EXHIBIT C to the Lease is $_________, resulting in an 
additional rent amount of $_________ per month pursuant to Section 3.1(d) of 
the Lease.

     EXECUTED as of the date first set forth above.


     "Landlord"                               "Tenant"

BRITANNIA HACIENDA V LIMITED            PROBUSINESS SERVICES, INC., a
PARTNERSHIP, a Delaware limited         Delaware corporation
partnership 

By:  BRITANNIA HOPYARD, LLC, a          By:
     California limited liability            ----------------------------
     company, General Partner           Its: 
                                             ----------------------------

     By:                                By:
         ------------------------           -----------------------------
         T.J. Bristow                   Its:
         Manager & President                -----------------------------



                                 EXHIBIT D