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                                                                   Exhibit 10.25

                      STANDARD INDUSTRIAL LEASE AGREEMENT

                                    between

            TCEP II PROPERTIES JOINT VENTURE, a Texas joint venture

                                  as Landlord

                                      and

               CHAD THERAPEUTICS, INC., a California corporation

                                   as Tenant


                 Premises Location:        21622 Plummer Street
                                           Chatsworth, California 91311
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                      STANDARD INDUSTRIAL LEASE AGREEMENT


         THIS STANDARD INDUSTRIAL LEASE AGREEMENT (this "Lease"), dated this
12th day of April, 1996, is made and entered into by and between TCEP II
PROPERTIES JOINT VENTURE, a Texas joint venture, hereinafter referred to as
"Landlord", and CHAD THERAPEUTICS, INC., a California corporation, hereinafter
referred to as "Tenant".


                            BASIC LEASE  PROVISIONS

1.       Area of Premises: Approximately 54,361 rentable square feet.
         (Paragraph 1.1)

2.       Building Address:        21622 Plummer Street
                                  Chatsworth, California 91311
                                  (Paragraph 1.1)

3.       Commencement Date: The earlier of (a) Tenant's commencement of
         business operations from the Premises, or (b) July 1, 1996.

4.       Term: Eighty-four (84) months. (Paragraph 1.2)

5.       The amount of the First Month's Rent is as follows: (Paragraph 2. 1)


                                                                                    
         (a)     Base Rent (See Paragraph 2.2 for adjustments thereto)                    $24,500.00
         (b)     Taxes                                                                     $2,989.86
         (c)     Insurance                                                                 $1,630.83
         (d)     Operating Expenses                                                        $3,261.66
                 First Month's Rent Total                                                 $32,382.35


6.       Security Deposit: $24,500.00. (Paragraph 2.3)

7.       Tenant's Proportionate Share: The Premises comprise forty-one and
         60/the percent (41.60%) of the Building (such percentage shall be
         Tenant's Proportionate Share). (Paragraph 2.4)

8.       Use of Premises:         Light manufacturing, assembly, warehousing
                                  and distribution of medical care products,
                                  all subject to compliance with all laws,
                                  codes, rules and regulations (Paragraph 3.1)

9.       Parking: 150 automobiles, 75 of which may be on a reserved basis in
         accordance with the terms of Paragraph 3.3.  (Paragraph 3.3)

10.      Liability insurance amount: $3,000,000.00.
         (Paragraph 12.3.1)

11.      Tenant's Address
         For Notices:             9445 De Soto Avenue 
                                  Chatsworth, California 91311
                                  (Paragraph 22.21)

12.      Landlord's Address For
         Payments and Notices:    5801 S. Eastern Avenue, Suite 100 
                                  Los Angeles, California 90040 
                                  (Paragraph 22.21)





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13.      Brokers:                 The Seeley Company (Robert Valencia) and
                                  Trammell Crow So.  Cal, Inc. 
                                  (Paragraph 22.24)

14.      Exhibits:

         "A" Site Plan of Project
         "B" Work Letter and Construction Agreement
         "C" Additional Provisions

         The paragraphs of the Lease identified above in parentheses are those
provisions where references to particular items from the Basic Lease Provisions
appear, and such items are incorporated into the Lease as part thereof.  In the
event of any conflict between any Basic Lease Provision and the Lease, the
former shall control.





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1.       PREMISES AND TERM.

         1.1     LEASE OF PREMISES.  Landlord leases to Tenant, and Tenant
hires from Landlord, certain premises (the "Premises") consisting of the
rentable area shown in Item 1 of the Basic Lease Provisions within a building
(the "Building") described in Item 2 of the Basic Lease Provisions.  The
location of the Building and Premises are shown on the site plan attached
hereto as "Exhibit A" and incorporated herein.  The "Project" shall refer to
the land shown on the site plan (the "Land") together with such additions and
deletions to the Land as Landlord may from time to time designate, plus all
buildings and improvements located thereon.

         1.2     TERM.  The term of this Lease shall commence on the
"Commencement Date" specified in or established pursuant to Item 3 of the Basic
Lease Provisions, and except as otherwise provided herein, shall continue in
full force and effect through the number of months provided in Item 4 of the
Basic Lease Provisions (the "Term"), provided, however, that if the
Commencement Date is a date other than the first day of a calendar month, the
Term shall consist of the remainder of the calendar month including and
following the Commencement Date, plus said number of full calendar months.

         1.3     CONDITION OF PREMISES.

         Tenant acknowledges that it has inspected and accepts the Premises in
their present condition as suitable for the purpose for which the Premises are
leased.  Notwithstanding the preceding sentence, Landlord shall make the
following repairs, alterations or improvements prior to delivery of possession
of the Premises to Tenant: (a) repair and/or replace the existing mezzanine
floor within the Premises as reasonably necessary to be functional and comply
with law; and (b) provide an electrical meter and switch of 480 volts, 3 phase,
4 wire, with at least 600 amps service to the Premises ("Initial Electrical
Service") (collectively, "Landlord's Work").  The taking of possession by
Tenant shall be conclusive to establish that the Premises are in good and
satisfactory condition when possession is taken, except that Landlord hereby
agrees to use all commercially reasonable efforts to replace the Initial
Electrical Service with an electrical meter and switch of 480 volts, 3 phase, 4
wire, with at least 1000 amps service to the Premises ("Modified Electrical
Service") on or before the later of (i) Tenant's commencement of business
operations from the Premises, or (ii) July 1, 1996 (the "Modified Electrical
Service Outside Date").  If Landlord is unable to provide the Modified
Electrical Service to the Premises on or before the Modified Electrical Service
Outside Date, and such failure is not due in whole or in part to any act or
omission of Tenant or Tenant's Parties, then for each day of delay in
Landlord's delivery of the Modified Electrical Service beyond the Modified
Electrical Service Outside Date, Tenant shall accrue one (1) day of Rent
credit.  Landlord shall coordinate with Tenant's contractor and/or architect in
connection with the installation of the Modified Electrical Service.  Tenant
further acknowledges that no representations or promises were made by Landlord
or any agent of Landlord to repair, alter, remodel or improve the Premises,
except as expressly set forth in this Lease.  Notwithstanding the foregoing,
Landlord represents and warrants that the exterior roof covering the Premises
is in good condition and repair (except to the extent any defects in the roof
exist as a result of any act or omission of Tenant or Tenant's Parties [defined
below], in which event Tenant shall be solely responsible for the repair
thereof); provided, however, if Tenant does hot deliver written notice to
Landlord of any defects with respect to the condition of the roof before the
end of the twenty-fourth (24th) month of the Term, Tenant shall be deemed to
have inspected and accepted the condition of the roof in its present condition
as suitable for the purpose for which the Premises are leased and the
correction of any subsequently discovered defects shall be the obligation of
Tenant (except as





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expressly provided to the contrary in Paragraph 5.1 below).  If a breach of the
foregoing warranty exists and Tenant timely (i.e., within 24 months) delivers
written notice to Landlord of the same setting forth in reasonable detail a
description of such breach, Landlord shall, as Tenant's sole and exclusive
remedy, rectify the same at Landlord's sole expense.

         The Commencement Date shall be the date provided in Item 3 of the
Basic Lease Provisions.  If this Lease is executed before the Premises become
vacant or otherwise available or if any present tenant or occupant of the
Premises holds over, and Landlord cannot acquire possession of the Premises in
time to deliver them by the Commencement Date, or if any required repairs,
alterations or improvements are not substantially completed by Landlord prior
to the Commencement Date, this Lease shall not be void or voidable, and
Landlord shall not be deemed to be in default hereunder, nor shall Landlord be
liable for any loss or damage directly or indirectly arising out of or
resulting from such holdover.  Tenant agrees to accept possession of the
Premises at such time as Landlord is able to tender the same, which date shall
thenceforth be deemed the Commencement Date.  After the Commencement Date,
Tenant shall, upon demand, execute and deliver to Landlord a letter of
acceptance of delivery of the Premises specifying the Commencement Date.
Notwithstanding the foregoing, (a) if Landlord is unable to deliver possession
of the Premises to Tenant with Landlord's Work substantially completed on or
before April 15, 1996 (the "Initial Target Delivery Date"), and such failure is
not due in whole or in part to any Force Majeure Event (as defined below) or
any act or omission of Tenant or Tenant's Parties, then the Commencement Date
shall be delayed by one (1) day for each day of delay beyond the Initial Target
Delivery Date that Landlord has failed to deliver possession of the Premises to
Tenant with Landlord's Work, substantially completed, and (b) if Landlord is
unable to deliver possession of the Premises to Tenant with Landlord's Work
substantially completed on or before May 15, 1996 (the "Initial Outside Date"),
and such failure is not due in whole or in part to any Force Majeure Event or
any act or omission of Tenant or Tenant's Parties, then Tenant shall have the
right to terminate this Lease by delivering thirty (30) days advance written
notice to Landlord within ten (10) days following the Initial Outside Date;
provided, however, if Landlord delivers possession of the Premises to Tenant
with Landlord's Work substantially completed on or before the expiration of the
thirty (30) day period following Tenant's delivery of termination notice,
Tenant's termination notice shall be null and void and this Lease shall remain
in full force and effect.  If Tenant fails to timely deliver any such
termination notice within said ten (10) days following the Initial Outside
Date, Tenant shall have no further right of termination with respect to the
Initial Outside Date and this Lease shall continue in full force and effect.
The Initial Target Delivery Date and the Initial Outside Date shall be extended
for each day of delay resulting from any Force Majeure Event or any act or
omission of Tenant or Tenant's Parties.  Notwithstanding the occurrence of any
Force Majeure Event, if Landlord fails to deliver possession of the Premises to
Tenant with Landlord's Work substantially completed on or before June 15, 1996
("Ultimate Outside Date"), and such failure is not due in whole or in part to
any act or omissions of Tenant or Tenant's Parties (each such day of delay to
result in one (1) day of delay of the Ultimate Outside Date), then Tenant shall
have the right to terminate this Lease upon ten (10) days advance written
notice to Landlord within five (5) days following the Ultimate Outside Date;
provided, however, if Landlord delivers the Premises with Landlord's Work
substantially completed on or before the expiration of the ten (10) day period
following Tenant's delivery of the termination notice, Tenant's termination
notice shall be null and void and this Lease shall remain in full force and
effect.  If Tenant fails to timely deliver any such termination notice within
said ten (10) days following the Ultimate Outside Date, Tenant shall have no
further right of termination under this Paragraph 1.3. The term "Force Majeure
Event" shall mean





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fire, earthquake, or other acts of God, strikes, boycotts, war, riot,
insurrection, embargoes, shortages of equipment, labor or materials, delays in
issuance of governmental permits or approvals, weather delays or any other
cause beyond the reasonable control of Landlord.

         1.4     EARLY ENTRY INTO PREMISES.  Tenant may enter into the Premises
upon receipt of Landlord's consent, solely for the purpose of installing the
Tenant Improvements (as defined in Exhibit "B") and furniture, special flooring
or carpeting, trade fixtures, telephones, computers, photocopy equipment, and
other business equipment.  Such early entry will not advance the Commencement
Date so long as Tenant does not commence business operations from any part of
the Premises.  All of the provisions of this Lease shall apply to Tenant during
any early entry, including the indemnity in Paragraph 12.1, but excluding the
obligation to pay Rent unless and until Tenant has commenced business
operations in the Premises, whereupon Rent shall commence.  Landlord may revoke
its permission for Tenant's early entry if Tenant's activities or workers
unreasonably interfere with the completion of Landlord's Work.  If Tenant is
granted early entry, Landlord shall not be responsible for any loss, including
theft, damage or destruction to any work or material installed or stored by
Tenant at the Premises or for any injury to Tenant or its agents, employees,
contractors, subcontractors, subtenants, assigns or invitees (collectively,
"Tenant's Parties").  Landlord shall have the right to post appropriate notices
of non-responsibility and to require Tenant to provide Landlord with evidence
that Tenant has fulfilled its obligation to provide insurance pursuant to
paragraphs 7(c) and 12.3 of this Lease.

2.       RENT AND SECURITY DEPOSIT.

         2.1     RENT.  Rent (as defined below) shall accrue hereunder from the
Commencement Date.  The amounts per month provided in Item 5(a) of the Basic
Lease Provisions, as adjusted pursuant to Paragraph 2.2 ("Base Rent"), plus the
"Additional Rent" (as defined in Paragraph 2.5 below) shall collectively
constitute the "Rent".  The first full calendar month's Base Rent shall be due
and payable upon execution of this Lease in the total amount shown in Item 5(a)
of the Basic Lease Provisions.  A like monthly installment, subject to the
adjustments described herein, shall be due and payable without demand on or
before the first day of each calendar month succeeding the Commencement Date
during the Term, except that Rent for any fractional calendar month at the
commencement or end of the Term shall be prorated on a daily basis.

         2.2     ADJUSTMENT OF BASE RENT.  Base Rent shall be increased on the
first day of the thirteenth (13th), twenty-fifth (25th), thirty- seventh
(37th), forty-ninth (49th), sixty-first (61st) and seventy-third (73rd) months
as follows:



                 Month of Term             Base Rent
                                        
                 13-24                     $25,480.00 per month
                 25-36                     $26,499.20 per month
                 37-48                     $27,559.17 per month
                 49-60                     $28,661.53 per month
                 61-72                     $29,808.00 per month
                 73-84                     $31,000.32 per month


         2.3     SECURITY DEPOSIT.  Tenant shall deposit with Landlord upon
execution of this Lease the sum provided in Item 6 of the Basic Lease
Provisions ("Security Deposit"), which sum shall be held by Landlord in its
general fund, without obligation for interest, as security for the performance
of Tenant's covenants and obligations under this Lease, it being expressly
understood and agreed that the Security Deposit is not an advance rental
deposit or a measure of Landlord's damages in case of Tenant's default.  Upon
the occurrence of any event of default by Tenant,





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Landlord may, without prejudice to any other remedy provided herein or provided
by law, use the Security Deposit to the extent necessary to make good any
arrears of Rent or other payments due Landlord hereunder, all of which shall be
deemed to be Rent, and any other damage, injury, expense or liability caused by
such event of default; and Tenant shall pay to Landlord on demand the amount so
applied in order to restore the Security Deposit to its original amount.  Any
remaining balance of the Security Deposit shall be returned by Landlord to
Tenant within fourteen (14) days after termination of this Lease, provided all
of Tenant's obligations under this Lease have been fulfilled.

         2.4     TENANT'S PROPORTIONATE SHARE. "Tenant's Proportionate Share",
as used in this Lease, shall mean that portion of the cost of the applicable
item that is obtained by multiplying such cost of the applicable item by a
fraction, the numerator of which is the rentable square footage of the Premises
and the denominator of which is the rentable square footage of the Building,
which fraction is set forth as a percentage figure in Item 7 of the Basic Lease
Provisions.

         2.5      ADDITIONAL RENT.

                  2.5.1   DEFINITION.  In addition to the Base Rent set forth in
Paragraph 2.1, Tenant agrees to pay Tenant's Proportionate Share of (a) "Taxes"
as defined in and payable by Landlord pursuant to Paragraph 4.1 below, (b)
Landlord's costs of providing insurance on the Project pursuant to Paragraph
12.2 below, and (c) "Operating Expenses" as defined in and incurred pursuant to
Paragraph 5.1 below (collectively, "Additional Rent").  Notwithstanding the
foregoing, Tenant's Proportionate Share of "Controllable Operating Expenses"
(defined below) shall not increase by more than eight percent (8% per year
("Controllable Operating Expense Cap"), provided such Controllable Operating
Expense Cap shall be cumulative and compounded annually.  "Controllable
Operating Expenses" shall mean all Operating Expenses other than (i) Taxes,
(ii) insurance expenses, (iii) utility expenses, and (iv) labor cost increases
resulting from unionized labor or prevailing wage agreements (each of which
items shall not be subject to the Controllable Operating Expense Cap).

                  2.5.2   MONTHLY PAYMENTS AND ANNUAL RECONCILIATION.  On the 
first day of each month of the Term, Tenant shall pay Landlord a sum equal to
1/12 of the estimated amount of Additional Rent for that particular year based
on Landlord's reasonable estimate thereof, to be delivered to Tenant on or 
about April of each year during the Term.  The monthly payments are subject to
increase or decrease as determined by Landlord to reflect revised estimates of
such costs.  Tenant shall pay within ten (10) days following demand therefor by
Landlord any increases in estimated Additional Rent upon receipt of any initial
or revised estimate retroactive to January of that calendar year.  The payments
made by Tenant shall be reconciled annually (Landlord to use commercially
reasonable efforts to deliver such reconciliation statement on or about May 1
of each year).  If Tenant's total payments of Additional Rent are less than the
actual Additional Rent due under Paragraph 2.5.1, Tenant shall pay the
difference within ten (10) days following demand therefor by Landlord; if the
total payments of Additional Rent made by Tenant are more than the actual
Additional Rent due under Paragraph 2.5.1, Landlord shall retain such excess
and credit it to Tenant's next accruing Additional Rent payments, except at the
end of the Term, when any excess will be refunded.  Any failure or delay by
Landlord in delivering any estimate, demand or reconciliation shall not affect
the rights and obligations of the parties hereunder.

                  2.5.3   TENANT'S AUDIT RIGHTS.  Provided that Tenant is not 
then in default beyond any applicable cure period of its obligations to pay
Rent, or any other payments required to be made by it under this Lease and
provided further that Tenant





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shall have the right, once each calendar year, to reasonably review supporting
data for any portion of an actual statement of annual Operating Expenses
delivered by Landlord (the "Actual Statement") (provided, however, Tenant may
not have an audit right to all documentation relating to Building operations an
this would far-exceed the relevant information necessary to properly document a
pass-through billing statement, but real estate tax statements, and information
an utilities, repairs, maintenance and insurance will be available), in
accordance with the following procedure:

                          (i)     Tenant shall, within thirty (30) days after
any Actual Statement is delivered, deliver a written notice to Landlord
specifying the portions of the Actual Statement that are claimed to be
incorrect, and Tenant shall simultaneously pay to Landlord all amounts due from
Tenant to Landlord as specified in the Actual Statement.  In no event shall
Tenant be entitled co withhold, deduct, or offset any monetary obligation of
Tenant to Landlord under the Lease (including without limitation, Tenant's
obligation to make all payments of Rent and all payments of Tenant's Operating
Expenses) pending the completion of and regardless of the results of any review
of records under this Paragraph.  The right of Tenant under this Paragraph may
only be exercised once for any Actual Statement, and if Tenant fails to meet
any of the above conditions as a prerequisite to the exercise of such right,
the right of Tenant under this Paragraph for a particular Actual Statement
shall be deemed waived.

                          (ii)    Tenant acknowledges that Landlord maintains
its records for the project at Landlord's main office and Tenant and Landlord
agree that any review of records under this Paragraph shall be conducted by
Tenant's internal accountants or an independent firm of certified public
accountants selected by Tenant and subject to the reasonable approval of
Landlord.  Tenant acknowledges and agrees that any records reviewed under this
Paragraph constitute confidential information of Landlord, which shall not be
disclosed to anyone other than the accountants performing the review, the
principals of Tenant who receive the results of the review, and Tenant's
accounting employees.  The disclosure of such information to any other person,
whether or not caused by the conduct of Tenant, shall constitute a material
breach of this Lease.  Tenant shall pay for the costs of its audit, unless it
is conclusively determined in accordance with Section 2.5.3(iii) that Landlord
has overstated Operating expenses on the Actual Statement by five percent (5%)
or more, in which case Landlord shall pay for Tenant's reasonable out-of-pocket
costs incurred in conducting such audit.

                          (iii)   Any errors disclosed by the review shall be
promptly corrected by Landlord, provided, however, that if Landlord disagrees
with any such claimed errors, Landlord shall have the right to cause another
review to be made by an independent firm of certified public accountants of
national standing.  In the event of a disagreement between the two accounting
firms (or between Tenant's internal accountants and Landlord's accounting firm,
as the case may be), the review that discloses the least amount of deviation
from the Actual Statement shall be deemed to be correct.  In the event that the
results of the review of records (taking into account, if applicable, the
results of any additional review caused by Landlord) reveal that Tenant has
overpaid obligations for a preceding period, the amount of such overpayment
shall be credited against Tenant's subsequent installment obligations to pay
the estimated Operating Expense.  In the event that such results show that
Tenant has underpaid its obligations for a preceding period, the amount of such
underpayment shall be paid by Tenant to Landlord with the next succeeding
installment obligation of estimated Operating Expense.

         2.6     PAYMENT.  Tenant shall pay Landlord all amounts due from
Tenant to Landlord hereunder, whether for Rent or otherwise,' in lawful money
of the United States, at the place designated for the delivery of notices to
Landlord pursuant to Paragraph 22.21, without any deduction or offset
whatsoever, except as expressly set forth in this Lease to the contrary.

         2.7     LATE CHARGES.  Tenant acknowledges that late payment by Tenant
of any sum owed to Landlord under this Lease will cause Landlord to incur costs
not contemplated by this Lease, the exact





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amounts of which are extremely difficult and impracticable to fix.  Such costs
include, without limitation, processing and accounting charges, time spent
addressing the issue with Tenant, and late charges that may be imposed on
Landlord by the terms of any obligation or note secured by any encumbrance
covering the Premises.  Therefore, if any installment of rent or other payment
due from Tenant is not received by Landlord within five (5) days from when due,
Tenant shall pay to Landlord an additional sum equal to five percent (5%) of
the overdue rent or other payment as a late charge.  Late charges shall be
deemed Additional Rent.  The parties agree that this late charge represents a
fair and reasonable estimate of the administrative and other costs that
Landlord will incur by reason of a late payment by Tenant.  Acceptance of any
late payment charge shall not constitute a waiver of Tenant's default with
respect to the overdue payment, nor prevent Landlord from exercising any of the
other rights and remedies available to Landlord under this Lease, at law or in
equity, including, but not limited to, the interest charge imposed pursuant to
Paragraph 22.2.

         2.8     BASE RENT CREDIT.  Provided that Tenant is not in default
under any of the terms, covenants or conditions of this Lease, Tenant shall be
credited with the payment of one-half (1/2) of the Base Rent due and payable
under this Lease for the first (1st) through the tenth (10th) months of the
Term, as and when the same becomes due (i.e., the credit shall be in the amount
of $12,250.00 per month for each of the first ten (10) months of the Term).  No
such Base Rent credit shall reduce or limit any Additional Rent or other sum
due and payable by Tenant under this Lease.  Tenant understands and agrees that
the foregoing Base Rent credit is conditioned upon Tenant's not having
wrongfully terminated this Lease or Landlord not having. terminated this Lease
by reason of Tenant's default hereunder (each such termination, a "Trigger
Event").  Accordingly, upon the occurrence of any Trigger Event during any
portion of the Base Rent credit period, the foregoing Base Rent credit shall be
null and void, and all of the Base Rent which, in the absence of such Base Rent
credit, would have been payable during such period up to the date of the
Trigger Event shall become immediately due and payable by Tenant, and Tenant
shall pay Base Rent during the remainder of such Base Rent credit period as
such Base Rent would have become due and payable in the absence of such Base
Rent credit provision.

3.      USE.

         3.1     USE OF PREMISES.  Subject to any additional uses or
limitations on use contained in Item 8 of the Basic Lease Provisions, the
Premises shall be used only for the purpose of receiving, storing, shipping and
selling (other than retail) products, materials and merchandise made and/or
distributed by Tenant and for such other lawful purposes as may be directly
incidental thereto, and for no other use or purpose.  Tenant acknowledges that
Landlord has not made any representations or warranties with respect to the
suitability of the Premises for Tenant's uses.  Tenant and Tenant's Parties
shall at all times comply with all rules and regulations regarding the
Premises, the Building and/or the Project as Landlord may establish from time
to time.  Landlord shall not be responsible for nor liable to Tenant for any
violation and/or enforcement of such rules and regulations by any other tenant
of the Project.

                 Tenant shall be responsible for and shall at its own cost and
expense obtain any and all licenses and permits necessary for any such use.
Tenant shall comply with all governmental laws, ordinances and regulations
applicable to the use of the Premises, including, without limitation, the
Americans with Disabilities Act of 1990 triggered subsequent to the
Commencement Date as a result of Tenant's alterations or use of the Premises.
Without limiting the generality of the foregoing, and subject to Paragraph 7
below, Tenant shall at its own cost and expense install and construct all
physical improvements to or





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needed to serve the Premises (but not the exterior of the Building unless
triggered by Tenant's alterations or particular use of the Premises) (i)
required by any federal, state or local building code or other law or
regulation enacted or becoming effective after the Commencement Date,
including, but not limited to, special plumbing, railings, ramps and other
improvements for use by the handicapped, or (ii) made necessary by the nature
of Tenant's use of the Premises; provided, however, that Landlord shall have
the option to install and construct such improvements, in which case the cost
thereof shall be equitably allocated by Landlord in its reasonable discretion
among the benefitted premises, and Tenant, upon demand, shall pay to Landlord,
as Additional Rent, such portion of the cost thereof as may be allocated
equitably, in Landlord's reasonable discretion, to the Premises.  Tenant shall
not place a load upon the floor of the Premises which exceeds the load per
square foot which such floor was designed to carry and which is allowed by law.
Tenant shall promptly comply with all governmental orders and directives for
the correction, prevention and abatement of nuisances in or upon, or connected
with, the Premises, all at Tenant's sole expense.  Tenant shall not permit any
objectionable or unpleasant odors, smoke, dust, gas, noise or vibrations to
emanate from the Premises, nor take any other action which would constitute a
nuisance or would disturb or endanger any other tenants of the Project or
unreasonably interfere with their use of their respective premises.  Landlord
shall be responsible for the exterior of the Building's compliance with the
Americans with Disabilities Act of 1990 unless any such compliance requirements
are triggered by Tenant's alterations or particular use of the Premises, in
which event Tenant shall be responsible for all such compliance.

                Tenant shall not permit the Premises to be used for any purpose
or in any manner (including without limitation any method of storage) which
would render the insurance thereon void or the insurance risk more hazardous or
cause the state insurance authority to disallow any sprinkler credits.  If any
increase in the fire and extended coverage insurance premiums paid by Landlord
or other tenants for the Project is caused by Tenant's use and occupancy of the
Premises, or if Tenant vacates the Premises and causes any increase in such
premiums, then Tenant shall pay as additional Rent the amount of such increase
to Landlord, and, upon demand by Landlord, correct at Tenant's expense the
cause of such disallowance, increased cost, penalty or surcharge to the
satisfaction of the particular insurance provider or authority, as applicable.

         3.2     HAZARDOUS MATERIALS.  Except for the incidental use of certain
products for routine cleaning and maintenance of floors, bathrooms, windows,
kitchens, and administrative offices on the Premises or Project, and certain
oxygen cylinders and adhesives which shall be stored in compliance with all
Environmental Laws, which products have been disclosed by Tenant to Landlord in
the Environmental Questionnaire (as defined below), Tenant hereby represents,
warrants and covenants that Tenant will not produce, use, store or generate any
"Hazardous Materials" (as defined below) on, under or about the Premises and/or
Project.  Tenant has fully and accurately completed Landlord's Pre-Leasing
Environmental Exposure Questionnaire ("Environmental Questionnaire"), which is
incorporated herein by reference.  Tenant shall not cause or permit any
Hazardous Material to be brought upon, placed, stored, manufactured, generated,
blended, handled, recycled, disposed of, used or released on, in, under or
about the Premises and/or Project by Tenant or Tenant's Parties.  Tenant shall
keep, operate and maintain the Premises in full compliance with all federal,
state and local environmental, health and/or safety laws, ordinances, rules,
regulations, codes, orders, directives, guidelines, permits or permit
conditions currently existing and as amended, enacted, issued or adopted in the
future which are applicable to the Premises (collectively, "Environmental
Laws").





                                      -9-
   11
                 Landlord shall have the right (but not the obligation) to
enter upon the Premises and cure any noncompliance by Tenant with the terms of
this Paragraph 3.2 or any Environmental Laws or any release, discharge, spill,
improper use, storage, handling or disposal of Hazardous Materials on, under,
from, or about the Premises or Project, regardless of the quantity of any such
release, discharge, spill, improper use, storage, handling or disposal of
Hazardous Materials on or about the Premises or Project, the full cost of which
shall be deemed to be Rent and shall be due and payable by Tenant to Landlord
immediately upon demand.  If Landlord elects to enter upon the Premises and
cure any such non-compliance or release, discharge, spill, improper use,
storage, handling or disposal of Hazardous Materials on, under, from, or about
the Premises or Project, Tenant shall not be entitled to participate in
Landlord's activities on the Premises.

                 If any information provided to Landlord by Tenant in the
Environmental Questionnaire, or otherwise relating to information concerning
Hazardous Materials is false, incomplete, or misleading in any material
respect, the same shall be deemed an event of default by Tenant under this
Lease.

                 Without limiting in any way Tenant's obligations under any
other provision of this Lease, Tenant and its successors and assigns shall
indemnify, protect, defend and hold Landlord, its partners, officers,
directors, shareholders, employees, agents, lenders, contractors and each of
their respective successors and assigns (collectively, the "Indemnified
Parties,") harmless from any and all claims, judgments, damages, penalties,
enforcement actions, taxes, fines, remedial actions, liabilities, losses, costs
and expenses (including, without limitation, reasonable attorneys' fees,
litigation, arbitration and administrative proceeding costs, expert and
consultant fees and laboratory costs) including, without limitation, damages
arising out of the diminution in the value of the Premises or Project or any
portion thereof, damages for the loss of the Premises or Project, damages
arising from any adverse impact on the marketing of space in the Premises or
Project, and sums paid in settlement of claims, which arise during or after the
Term in whole or in part as a result of the presence or suspected presence of
any Hazardous Materials, in, on, under, from or about the Premises or the
Project and/or other adjacent properties due to Tenant's or Tenant's Parties'
activities, or failures to act (including, without limitation, Tenant's failure
to report any spill or release to the appropriate regulatory agencies), on or
about the Premises or Project.

                 For purposes of this Lease, the term "Hazardous Material"
means any chemical, substance, material, controlled substance, object, waste or
any combination thereof, which is or may be hazardous to human health, safety
or to the environment due to its radioactivity, ignitability, corrosiveness,
reactivity, explosiveness, toxicity, carcinogenicity, infectiousness or other
harmful or potentially harmful properties or effects, including, without
limitation, petroleum and petroleum products, benzene, toluene, ethyl benzene,
xylenes, waste oil, asbestos, radon, polychlorinated biphenyls (PCBs),
degreasers, solvents, and any and all of those chemicals, substances,
materials, controlled substances, objects, wastes or combinations thereof which
are now or may become in the future listed, defined or regulated in any manner
as "hazardous substances", "hazardous wastes", "toxic substances", "solid
wastes," or bearing similar or analogous definitions pursuant to any and all
Environmental Laws.

                 Notwithstanding anything to the contrary contained in this 
Lease, Tenant shall not be responsible, in any manner whatsoever, for any
violation of Environmental Laws regarding Hazardous Materials located in, on or
about the Premises (i) that was not caused or permitted, directly or
indirectly, by the acts or omissions of Tenant or any of Tenant's Parties, (ii)
that





                                      -10-
   12
existed in, on or under the Premises prior to Tenant's occupying of the
Premises unless caused or exacerbated by any acts or omissions of Tenant or any
of Tenant's Parties, (iii) that was caused by Landlord, or its agents,
contractors or employees, or (iv) that was caused by third parties unaffiliated
with Tenant or any of Tenant's Parties or which migrated onto the Premises from
neighboring properties owned and occupied by parties unaffiliated with Tenant
or any of Tenant's Parties.

         3.3     USE OF COMMON AREAS.  Tenant and Tenant's Parties shall have
the non-exclusive right, in common with the other parties occupying the
Project, to use the grounds, sidewalks, parking areas, driveways and alleys of
the Project, subject to such reasonable rules and regulations as Landlord may
from time to time prescribe.  Tenant and Tenant's Parties may park only up to
the maximum number of automobiles shown in Item 9 of the Basic Lease Provisions
near the Premises during normal business hours on a non-exclusive basis;
provided, however, Tenant shall have the right to park up to seventy-five (75)
of such vehicles on an exclusive basis, but only in the area identified on
Exhibit "A" as "Tenant's Reserved Parking Area".  If any other tenants of the
Building are unreasonably encroaching on Tenant's parking rights hereunder,
Tenant shall deliver written notice of the same to Landlord, and if Landlord
cannot reasonably present further encroachment by the adjacent tenant, Landlord
shall reserve up to all 150 parking spaces of Tenant (or such lesser number as
is necessary to provide Tenant with use of 150 parking spaces). outside
storage, including without limitation, trucks and other vehicles, is prohibited
without Landlord's prior written consent, which may be withheld in Landlord's
sole and absolute discretion.  Tenant shall not succeed to any of Landlord's
easement rights over and relating to the Project, nor shall Tenant obtain any
rights to common areas, as designated by Landlord, other than those rights
specifically granted to Tenant in this Lease.  Landlord shall have the sole
right of control over the use, maintenance, configuration, repair and
improvement of the common area.  Landlord may make such changes to the use or
configuration of, or improvements comprising, the common area as Landlord may
elect without liability to Tenant (including the right to add or eliminate
buildings from the Project), subject only to Tenant's vehicular parking rights
shown in Item 9 of the Basic Lease Provisions.

4.       TAXES.

         4.1     PAYMENT OF REAL PROPERTY TAXES.  Landlord agrees to pay,
before they become delinquent, all real property taxes; current installments of
any general or special assessments; license fees, commercial rental taxes, in
lieu taxes, levies, charges, penalties or similar impositions imposed by any
authority having the direct power to tax, and are paid or incurred by Landlord,
including but not limited to, the following: (a) any tax on or measured by Rent
received by Landlord from the Project or as against Landlord's business of
leasing any of the Project; (b) any assessment, tax, fee, levy or charge
imposed by governmental agencies for such services as fire protection, street,
sidewalk and road maintenance, transportation, refuse removal and for other
governmental services formerly provided without charge to property owners or
occupants; (c) assessments due to deed restrictions and/or owner associations;
and (d) costs of determining, filing, contesting and appealing any such tax,
assessment or charge, including accountants', attorneys' and consultants' fees,
but excluding any income, inheritance, estate or corporate franchise taxes of
Landlord (collectively, "Taxes").

            Taxes shall also include any assessment, tax, fee, levy or charge in
substitution, partially or totally, of any assessment, tax, fee, levy or charge
previously included within the definition of Taxes.  It is hereby acknowledged
by Tenant and Landlord that Proposition 13 was adopted by the voters of
California in June 1978 and that assessments, taxes, fees, levies





                                      -11-
   13
and charges may be imposed by governmental agencies for such services as fire
protection, street, sidewalk and road maintenance, transportation, refuse
removal and other governmental services formerly provided without charge to
property owners or occupants.  It is the intention of Tenant and Landlord that
all such new and increased assessments, taxes, fees, levies and charges, and
all similar assessments, taxes, fees, levies and charges be included within the
definition of Taxes for purposes of this Lease, and all property tax refunds
received by Landlord which relate to periods for which Tenant previously paid
Tenant's Proportionate Share of Taxes based on the amount of Taxes without
taking into account the refund shall be applied to reduce Tenant's next coming
due payment of Taxes.

         4.2     LIABILITY FOR ALL PERSONAL PROPERTY TAXES.  Tenant shall be
liable for all taxes levied or assessed against personal property, furniture,
fixtures, above-standard Tenant Improvements and alterations, additions or
improvements placed by or for Tenant in the Premises.  If any such taxes for
which Tenant is liable are levied or assessed against Landlord or Landlord's
property and if Landlord elects to pay the same or if the assessed value of
Landlord's property is increased by inclusion of personal property, furniture,
fixtures, above-standard Tenant Improvements or alterations, additions or
improvements placed by or for Tenant in the Premises, and Landlord elects to
pay the Taxes based on such increase, Tenant shall pay to Landlord, within ten
(10) days of written demand therefor, that portion of the Taxes.

5.       LANDLORD'S MAINTENANCE AND REPAIR.

         5.1     LANDLORD'S MAINTENANCE.  Subject to Tenant's obligation to
reimburse Landlord for all costs and expenses incurred by Landlord, Landlord
shall maintain and repair the exterior portions of the roof, and the foundation
and the structural soundness of the exterior walls of the Building and utility
facilities stubbed to the Premises in good condition, reasonable wear and tear
excepted.  The term "walls" as used herein shall not include windows, glass or
plate glass, doors, special store fronts or office entries, unless otherwise
specified by Landlord in writing.  Landlord shall also maintain, repair and
repaint the exterior walls, overhead doors, canopies, entries, handrails,
gutters and other exposed parts of the Building as deemed necessary by Landlord
to maintain safety and aesthetic standards, and Landlord shall maintain,
repair, and operate the common areas of the Project, including but not limited
to, mowing grass and general landscaping, maintenance of parking areas,
driveways and alleys, parking lot sweeping, paving and restriping, exterior
lighting, painting, pest control and window washing.  The cost of all of the
foregoing, including the cost of all supplies, uniforms, equipment, tools and
materials, together with utility costs not otherwise charged directly to Tenant
or other tenants, all wages and benefits of employees and independent
contractors engaged in the operation, maintenance and repair of the Project,
all expenses for security and safety services and equipment, any license,
permit and inspection fees required in connection with the operation,
maintenance or repair of the Project (but not related to improvements to tenant
space), management, consulting, legal and accounting fees of independent
contractors engaged by Landlord (but not related to the negotiation or
enforcement of leases), other costs and expenses actually incurred by Landlord
in connection with the ownership, operation, leasing and management of the
Project, and other usual costs and expenses which are typically paid by other
landlords to provide on-site operation of industrial, warehouse and service
center projects, are collectively referred to herein as "Operating Expenses"
and are subject to reimbursement by Tenant in accordance with Paragraph 2.5.1
above.  To the extent that an Operating Expense consists of a maintenance or
repair (including renovation and refurbishment) expense that is not properly
fully deductible as an expense in the year incurred in accordance with
generally accepted accounting principles, such expense shall be





                                      -12-
   14
amortized over its useful life.  Any amounts which are amortized shall result
in equal payments being included in operating Expenses for the year of
expenditure and succeeding years during the amortization period.

         5.2     PROCEDURE AND LIABILITY.  Tenant shall immediately give
Landlord written notice of any defect or the teed for repair of the items for
which Landlord is responsible, after which Landlord shall have reasonable
opportunity to repair the same or cure such defect.  Landlord's liability with
respect to any defects, repairs or maintenance for which Landlord is
responsible under any of the provisions of this Lease shall be limited to the
cost of such repairs or maintenance or the curing of such defect.  If Tenant or
Tenant's Parties caused any damage necessitating such repair, then Tenant shall
pay the cost thereof, upon demand.  Tenant hereby waives the benefit of
California Civil Code Sections 1941 and 1942, and any other statute providing a
right to make repairs and deduct the cost thereof from the Rent.  Tenant waives
any right to terminate this Lease or offset or abate Rent by reason of any
failure of Landlord to make repairs to the Premises.

6.       TENANT'S MAINTENANCE AND REPAIR.

         6.1     TENANT'S MAINTENANCE.  Tenant shall, at its own cost and
expense, keep and maintain all parts of the Premises (except those listed as
Landlord's responsibility in Paragraph 5.1 above) in good and sanitary
condition, ordinary wear and tear excepted, promptly making all necessary
repairs and replacements, including but not limited to, windows, glass and
plate glass, doors, any special store front or office entry, interior walls and
finish work, floors and floor covering, heating and air conditioning systems,
dock boards, truck doors, dock bumpers, plumbing work and fixtures, termite and
pest extermination, and regular removal of trash and debris.  If Tenant shall
fail to make any repair for which Tenant is responsible within ten (10) days
following notice from Landlord requiring the same, Landlord and its agents and
contractors shall have the right, but not the obligation, to enter upon the
Premises and perform such repairs, the full cost of which shall be deemed to be
Rent and shall be due and payable by Tenant to Landlord immediately within ten
(10) days following Landlord's written demand therefor; provided, however, that
if such disrepair is not susceptible to cure within such ten (10) day period,
Landlord shall not be permitted to perform the same at Tenant's expense so long
as Tenant has commenced such repair within such ten (10) day period and
thereafter diligently prosecutes the same to completion.  In the case of
emergency, Landlord, its agents and contractors may enter upon the Premises to
perform such repairs without the necessity of prior notice to Tenant.  Repairs
shall be made in accordance with all applicable laws, including without
limitation, the Americans with Disabilities Act of 1990.  The cost of
maintenance and repair of any common party wall (any wall, divider, partition
or any other structure separating the Premises from any adjacent premises
occupied by other tenants) shall be shared equally by Tenant and the tenant(s)
occupying such adjacent premises.  Tenant shall not damage any party wall or
disturb the integrity and support provided by any party wall and shall, at its
sole cost and expense, promptly repair any damage or injury to any party wall
caused by Tenant or Tenant's Parties.

         6.2     MAINTENANCE/SERVICE CONTRACTS.  Tenant shall, at its own cost
and expense, enter into a regularly scheduled preventive maintenance/service
contract with a maintenance contractor for servicing all hot water, heating and
air conditioning systems and equipment within the Premises.  The maintenance
contractor and the contract must be approved in writing by Landlord in advance.
The service contract shall include all services recommended by the equipment
manufacturer within the operation/maintenance manual and shall become effective
(and a copy thereof delivered to Landlord) within thirty (30) days following
the date Tenant takes possession of the Premises.





                                      -13-
   15
7.       ALTERATIONS.

         Tenant shall make no alterations, additions or improvements to the
Premises (including, without limitation, roof and wall penetrations) or any
part thereof without obtaining the prior written consent of Landlord in each
instance.  Such consent may be granted or withheld in Landlord's reasonable
discretion (except if such alterations are of a structural nature or affect the
exterior of the Building, in which event Landlord may withhold its consent in
its sole and absolute discretion); provided, however, Tenant may make
non-mechanical, non-electrical, non-structural alterations to the Premises
without the prior written consent of Landlord (but nevertheless requiring
advance written notice to Landlord) provided that the cost of such alterations
does not exceed $25,000.00 in any one instance or $100,000.00 in the aggregate
over the Term; provided further that such alterations do not affect the
exterior of the Premises or the Building.  Landlord may impose as a condition
to such consent such requirements as Landlord may deem necessary, in its
reasonable discretion, including, without limitation that: (a) Landlord be
furnished with working drawings before work commences; (b) Landlord approve the
contractor by whom the work is to be performed; and (c) adequate course of
construction and general liability insurance be in place and Landlord be named
as an additional insured under the contractor's liability and property
insurance policies.  All such alterations, additions or improvements must be
performed in a good and workmanlike manner in compliance with all laws, rules
and regulations, including, without limitation, the Americans with Disabilities
Act of 1990, and diligently prosecuted to completion.  Tenant shall deliver to
Landlord upon commencement of such work, a copy of the building permit with
respect thereto, and a certificate of occupancy, if applicable, immediately
upon completion of the work.  All such work shall be performed so as not to
obstruct the access to the premises of any other tenant in the Building or
Project.  Should Tenant make any alterations without Landlord's prior written
consent, or without satisfaction of any of the conditions established by
Landlord in conjunction with granting such consent, Landlord shall have the
right, in addition to and without limitation of any right or remedy Landlord
may have under this Lease, at law or in equity, to require Tenant to remove all
or some of the alterations, additions or improvements at Tenant's sole cost and
restore the Premises to the same condition as existed prior to undertaking the
alterations, or if Tenant shall fail to do so, Landlord may cause such removal
or restoration to be performed at Tenant's expense and the cost thereof shall
be Additional Rent to be paid by Tenant within ten (10) days following written
demand therefor.  Subject to the terms of Paragraph 16, Landlord shall have the
right to require Tenant, at Tenant's expense, to remove any and all
alterations, additions or improvements and to restore the Premises to its prior
condition upon the expiration or sooner termination of this Lease.  Tenant
shall notify Landlord in writing at least ten (10) days prior to the
commencement of any such work in or about the Premises, and Landlord shall have
the right at any time and from time to time to post and maintain notices of
nonresponsibility in or about the Premises.

8.       LIENS.

         Tenant shall have no authority, express or implied, to create or place
any lien or encumbrance of any kind or nature whatsoever upon, or in any manner
to bind, the interest of Landlord or Tenant in the Premises or to charge the
Rent payable hereunder for any claim in favor of any person dealing with
Tenant, including those who may furnish materials or perform labor for any
construction or repairs.  Tenant shall pay or cause to be paid all sums legally
due and payable by it on account of any labor performed or materials furnished
in connection with any work performed by Tenant on the Premises.  Tenant shall
discharge of record by payment, bonding or otherwise any lien filed against the
Premises on account of any labor performed or materials





                                      -14-
   16
furnished in connection with any work performed by Tenant on the Premises
immediately upon the filing of any claim of lien.  Tenant shall indemnify,
defend and hold Landlord harmless from any and all liability, loss, cost or
expense based on or arising out of asserted claims or liens against the
leasehold estate or against the right, title and interest of Landlord in the
Project or this Lease arising from the act or agreement of Tenant.  Tenant
agrees to give Landlord immediate written notice of the placing of any lien or
encumbrance against the Premises.  Landlord shall have the right, at Landlord's
option, of paying and discharging the same or any portion thereof without
inquiry as to the validity thereof, and any amounts so paid, including expenses
and applicable late charge, shall be Additional Rent immediately due and
payable by Tenant upon rendition of a bill therefor; provided, however, with
respect to any liens which appear of record and for which Landlord receives
written notice during the first ninety (90) days of the Term only, Landlord
must provide at least twenty (20) days prior written notice to Tenant before
paying and discharging any such lien at Tenant's expense.

9.       SIGNS.

         9.1     SIGNAGE.  Subject to compliance with all laws, rules,
regulations, ordinances and CC&Rs, Tenant shall have the nonexclusive right to
install a sign of its name on the Building, the exact size, location and
appearance of which shall be subject to Landlord's approval.  Any and all costs
in connection with the fabrication, installation, maintenance and removal of
such sign shall be borne by Tenant at its sole cost and expense.  Tenant's
signage rights contained herein are personal to CHAD Therapeutics, Inc. and may
not be assigned under any circumstances, whether voluntarily or involuntarily,
except with Landlord's prior written consent, which consent shall not be
unreasonably withheld.

         9.2     CRITERIA FOR CHANGES.  Tenant shall not, without Landlord's
prior written consent, which may be withheld in Landlord's sole and absolute
discretion: (a) make any changes to or paint the exterior of the Building; (b)
install any exterior lights, decorations or paintings; or (c) erect or install
any signs, window or door lettering, placards, decorations or advertising media
of any type which can be viewed from the exterior of the Premises.  All signs,
decorations, advertising media, blinds, draperies and other window treatment or
bars or other security installations visible from outside the Premises shall be
subject to the prior written approval of Landlord as to construction, method of
attachment, size, shape, height, design, lighting, color and general
appearance.  All signs shall be in compliance with all applicable laws and
regulations and all covenants, conditions and restrictions relating to the
Premises.  All signs shall be kept in good condition and in proper operating
order at all times.

10.      UTILITIES.

         Tenant shall pay for all separately metered water, gas, heat, light,
telephone, sewer and sprinkler charges and for other utilities and services
used on or from the Premises, together with any taxes, penalties, surcharges or
the like pertaining thereto and any maintenance charges for utilities, and
shall furnish all electric light bulbs and tubes.  If any utilities serving the
Premises are not separately metered, Tenant shall pay to Landlord its
proportionate share of the cost thereof as reasonably determined by Landlord.
Landlord shall in no event be liable for any damages directly or indirectly
resulting from or arising out of the interruption or failure of utility
services on the Premises.  Tenant shall have no right to terminate this Lease
nor shall Tenant be entitled to any abatement in Rent as a result of any such
interruption or failure of utility services.  No such interruption or failure
of utility services shall be deemed to constitute a constructive eviction of
Tenant.  Notwithstanding the foregoing, if any of the utilities are interrupted
and not





                                      -15-
   17
available ("Interruption") for more than five (5) consecutive business days,
then beginning on the sixth (6th) consecutive business day of Interruption
through the last day of such Interruption, Tenant shall be entitled to an
abatement of Rent, and the Term shall be extended the same number of days, but
only if (i) the Interruption is not caused by a casualty covered by Paragraph
11 of this Lease or by an act or omission of Tenant or Tenant's Parties, (ii)
Tenant is materially prevented by the Interruption from using and does not use
the Premises or any portion thereof, and (iii) Tenant has provided Landlord
with written notice of the same.

11.      FIRE AND CASUALTY DAMAGE.

         11.1    NOTICE OF DESTRUCTION.  If the Premises are damaged or
destroyed by fire, earthquake or other casualty, Tenant shall give immediate
written notice thereof to Landlord.

         11.2    LOSS COVERED BY INSURANCE.  If at any time prior to the
expiration or termination of this Lease, the Premises or the Project are wholly
or partially damaged or destroyed, the loss to Landlord from which is fully
covered (except for any applicable deductibles) by proceeds of insurance
maintained or required to be maintained by Landlord or for Landlord's benefit,
which damage renders the Premises totally or partially inaccessible or unusable
by Tenant in the ordinary conduct of Tenant's business, then:

                 (a)      If all repairs to the Premises or Project can, in
Landlord's judgment, be completed within two hundred (200) days following the
date of notice to Landlord of such damage or destruction without the payment of
overtime or other premiums, and if such damage or destruction is not the result
of the negligence or willful misconduct or omission of Tenant or Tenant's
Parties (as contemplated in Paragraph 11.4), Landlord shall notify Tenant of
the same within sixty (60) days following the date of notice to Landlord of
such damage or destruction, and Landlord shall, at Landlord's expense (other
than the deductible) (provided Landlord can obtain all necessary governmental
permits and approvals therefor at reasonable cost and on reasonable
conditions), repair the same, and this Lease shall remain in full force and
effect and a proportionate reduction of Rent shall be allowed Tenant for such
portion of the Premises as shall be rendered inaccessible or unusable to Tenant
during the period of time that such portion is unusable or inaccessible.  There
shall be no proportionate reduction of Rent by reason of any portion of the
Premises being unusable or inaccessible for a period equal to five (5)
consecutive business days or less.

                 (b)      If such damage or destruction is not the result of
the negligence or willful misconduct or omission of Tenant or Tenant's Parties,
and if all such repairs cannot, in Landlord's judgment, be completed within two
hundred (200) days following the date of notice to Landlord of such damage or
destruction without the payment of overtime or other premiums, Landlord shall
notify Tenant of the same within sixty (60) days following the date of notice
to Landlord of such damage or destruction, in which event either party may, at
its sole and absolute option, by written notice to the other given within
twenty (20) days following the date of Landlord's notice to Tenant stating that
all such repairs cannot in Landlord's judgment, be completed within said two
hundred (200) days, terminate this Lease as of the date of the occurrence of
such damage or destruction; provided, however, if neither party elects to
terminate this Lease within said twenty (20) day period, then this Lease shall
remain in full force and effect, but the Rent shall be proportionately reduced
as provided in Paragraph 11.2(a).

                 Notwithstanding anything to the contrary contained in this
Paragraph 11, Tenant shall pay to Landlord, within ten (10) days following
Landlord's demand therefor, the amount of the





                                      -16-
   18
deductible under Landlord's insurance policy (Tenant's Proportionate Share of
which shall not exceed (i) $25,000.00 per occurrence for casualties covered
under Landlord's all risk property insurance, and (ii) $100,000.00 per
occurrence under Landlord's earthquake coverage, if any).  If the damage
involves portions of the Project other than the Premises, Tenant shall pay only
a portion of the deductible based on the ratio of the cost of repairing the
damage in the Premises to the total cost of repairing all of the damage in the
Project.

         11.3    LOSS NOT COVERED BY INSURANCE.  If, at any time prior to the
expiration or termination of this Lease, the Premises or the Project are
totally or partially damaged or destroyed from a risk, the loss to Landlord
from which is not fully covered (except for any applicable deductibles) by
insurance maintained or required to be maintained by Landlord or for Landlord's
benefit, which damage renders the Premises inaccessible or unusable to Tenant
in the ordinary course of its business, and if such damage or destruction is
not the result of the negligence or willful misconduct or omission of Tenant or
Tenant's Parties, Landlord may, at its option, upon written notice to Tenant
within thirty (30) days after notice to Landlord of the occurrence of such
damage or destruction, elect to repair or restore such damage or destruction,
or Landlord may elect to terminate this Lease.  If Landlord elects to repair or
restore such damage or destruction, this Lease shall continue in full force and
effect, but the Rent shall be proportionately reduced as provided in Paragraph
11.2(a). If Landlord elects to terminate this Lease, such termination shall be
effective as of the date of the occurrence of such damage or destruction.
Notwithstanding anything to the contrary contained in this Paragraph 11.3, if
all such repairs cannot, in Landlord's judgment, be completed within two
hundred (200) days following the date of notice to Landlord of such damage or
destruction without the payment of overtime or other premiums, Landlord shall
notify Tenant of the same within sixty (60) days following the date of notice
to Landlord of such damage or destruction, in which event either party may, at
its sole and absolute option, by written notice to the other given within
twenty (20) days following the date of Landlord's notice to Tenant stating that
all such repairs cannot, in Landlord's judgment, be completed within said two
hundred (200) days, terminate this Lease as of the date of occurrence of such
damage or destruction; provided, however, if neither party elects to terminate
this Lease within said twenty (20) day period, then this Lease shall remain in
full force and effect but the Rent shall be proportionately reduced as provided
in Paragraph 11.2(a).

         11.4    LOSS CAUSED BY TENANT OR TENANT'S PARTIES.  If the Premises or
the Project are wholly or partially damaged or destroyed as a result of the
negligence or willful misconduct or omission of Tenant or Tenant's Parties,
Tenant shall forthwith diligently undertake to repair or restore all such
damage or destruction at Tenant's sole cost and expense, or Landlord may at its
option undertake such repair or restoration at Tenant's sole cost and expense;
provided, however, that Tenant shall be relieved of its repair and payment
obligations pursuant to this Paragraph 11.4 to the extent such damage is
covered by insurance carried or required to be carried by Landlord hereunder,
although Tenant shall in all such events pay to Landlord the full amount of the
deductible under Landlord's insurance policy and any amounts not insured.  This
Lease shall continue in full force and effect without any abatement or
reduction in Rent or other payments owed by Tenant.

         11.5    DESTRUCTION NEAR END OF TERM.  Notwithstanding the foregoing,
if the Premises or the Project are wholly or partially damaged or destroyed
(such that the same cannot, in Landlord's judgment, be repaired or restored
within sixty (60) days) within the final nine (9) months of the Term, either
party may, at its option, elect to terminate this Lease upon written notice
given





                                      -17-
   19
to the other within thirty (30) days following such damage or destruction..

         11.6    DESTRUCTION OF IMPROVEMENTS AND PERSONAL PROPERTY.  In the
event of any damage to or destruction of the Premises or the Project, under no
circumstances shall Landlord be required to repair, replace or compensate
Tenant, Tenant's Parties or any other person for the personal property, trade
fixtures, machinery, equipment or furniture of Tenant or any of Tenant's
Parties, or any alterations, additions or improvements installed in the
Premises by Tenant, and Tenant shall promptly repair and replace all such
personal property and improvements at Tenant's sole cost and expense.

         11.7    EXCLUSIVE REMEDY.  The provisions of this Paragraph 11 shall
constitute Tenant's sole and exclusive remedy in the event of damage or
destruction to the Premises or the Project, and Tenant waives and releases all
statutory rights and remedies in favor of Tenant in the event of damage or
destruction, including without limitation those available under California
Civil Code Sections 1932 and 1933(4).  No damages, compensation or claim shall
be payable by Landlord for any inconvenience, any interruption or cessation of
Tenant's business, or any annoyance, arising from any damage or destruction of
all or any portion of the Premises or the Project.

         11.8    LENDER DISCRETION.  Notwithstanding anything herein to the
contrary, in the event the holder of any indebtedness secured by a mortgage or
deed of trust covering the Premises requires that the insurance proceeds from
insurance held by Landlord be applied to such indebtedness, then Landlord shall
have the right to deliver written notice to Tenant terminating. this Lease.

12.      INDEMNITY AND INSURANCE.

         12.1    INDEMNITY.  Tenant shall indemnify, protect, defend and hold
the Indemnified Parties harmless from any and all claims, judgments, damages,
liabilities, losses, sums paid in settlement of claims, costs and expenses
(including, but not limited to, reasonable attorneys, fees and litigation
costs), obligations, liens and causes of action, whether threatened or actual,
direct or indirect (collectively, "Claims"), which arise in any way, directly
or indirectly, resulting from or in connection with, in whole or in part,
Tenant's or Tenant's Parties' activities in, on or about the Premises or
Project, including, without limitation, Tenant's breach or default of any
obligation of Tenant to be performed under the terms of this Lease, the conduct
of Tenant's business, the nonobservance or nonperformance of any law, ordinance
or regulation or the negligence or misconduct of Tenant or Tenant's Parties,
except injury to persons or damage to property the sole cause of which is the
negligence or willful misconduct of Landlord, or the wrongful failure of
Landlord to repair any part of the Project which Landlord is obligated to
repair and maintain hereunder within a reasonable time after the receipt of
written notice from Tenant of needed repairs.  Landlord shall not be liable to
Tenant for any damages arising from any act, omission or neglect of any other
tenant in the Project.

         12.2    LANDLORD'S INSURANCE.  Landlord shall maintain (i) fire
insurance and extended all risk insurance covering the Building in an amount
not less than 100% of the replacement cost thereof, and (ii) such other types
(and in amounts) of insurance as Landlord deems necessary or desirable in its
sole discretion, which may include, without limitation, liability, property
damage and/or loss of rental income coverage.  Such insurance shall be for the
sole benefit of Landlord and under its sole control.  The premiums for any such
insurance shall be an Operating Expense.

         12.3   TENANT'S INSURANCE OBLIGATIONS.  Tenant agrees that at all
times from and after the date Tenant is given access to





                                      -18-
   20
the Premises for any reason, Tenant shall carry and maintain, at its sole cost
and expense, the following types, amounts and forms of insurance:

                 12.3.1   GENERAL LIABILITY INSURANCE.  A broad form
comprehensive general liability or commercial general liability policy covering
property damage, personal injury, advertising injury and bodily injury, and
including blanket contractual liability coverage for obligations under this
Lease, covering the Project in an amount of not less than the amount per
occurrence specified in Item 10 of the Basic Lease Provisions.  Such policy
shall be in the occurrence form with a per location general aggregate.  Each
policy shall name Landlord and any management agent from time to time
designated by Landlord and any lender of Landlord as additional insureds, and
shall provide that any coverage to additional insureds shall be primary; when
any policy issued to Landlord provides duplicate coverage or is similar in
coverage, Landlord's policy will be excess over Tenant's policies.  No
deductibles in excess of Five Thousand Dollars ($5,000) per occurrence shall be
permitted.  Tenant shall pay any deductibles.

                 12.3.2   PROPERTY INSURANCE.  A policy or policies, including
the Boiler and Machinery Perils and the Special Causes of Loss form of coverage
("All Risks"), including vandalism and malicious mischief, theft, sprinkler
leakage (including earthquake sprinkler leakage) and water damage coverage in
an amount equal to the full replacement value, new without deduction for
depreciation, on an agreed amount basis (no co-insurance requirement), of all
trade fixtures, furniture and equipment in the Premises, and all alterations,
additions and improvements to the Premises installed by or for Tenant or
provided to Tenant.  Such insurance shall also include business interruption
and extra expense coverage for Tenant's operations and debris removal coverage
for removal of property of Tenant and Tenant's Parties which may be damaged
within the Premises.  Such coverage shall name the Landlord as an additional
insured and/or loss payee as its interest may appear.  No deductibles in excess
of Five Thousand Dollars ($5,000) shall be permitted.  Tenant shall pay any
deductibles.

                 12.3.3   WORKERS' COMPENSATION INSURANCE.  Workers'
compensation insurance, including employers, liability coverage, shall comply
with applicable California law.  Such insurance shall include a waiver of
subrogation in favor of Landlord, if available.

         12.4    EVIDENCE OF COVERAGE.  All of the policies required to be
obtained by Tenant pursuant to Paragraph 12.3 shall be with companies and in
form satisfactory to Landlord.  Each insurance company providing coverage shall
have a current Best's Rating of "A-XII" or better.  Upon notice from Landlord,
Tenant shall add any mortgagee of the Building and any management agent
designated by Landlord as an additional insured or loss payee, as applicable.
Tenant shall provide Landlord with certificates and copies of endorsements (and
upon request, policies) of insurance acceptable to Landlord issued by each of
the insurance companies issuing any of the policies required pursuant to the
provisions of Paragraph 12.3, and said certificates and endorsements shall
provide that the insurance issued thereunder shall not be altered, cancelled or
non-renewed until after thirty (30) days, written notice to Landlord.  "Claims
made" policies shall not be permitted.  Each policy shall permit the waiver in
Section 12.5 below.  Evidence of insurance coverage shall be furnished to
Landlord prior to Tenant's possession of the Premises and thereafter not fewer
than fifteen (15) days prior to the expiration date of any required policy.
Tenant may satisfy its insurance obligations hereunder by carrying such
insurance under a so-called blanket policy or policies of insurance which are
acceptable to Landlord.  If Tenant fails to obtain any insurance required
hereby or provide evidence thereof to Landlord, Landlord may, but shall not be
obligated to, and Tenant hereby appoints





                                      -19-
   21
Landlord as its agent to, procure such insurance and bill the cost of
the-insurance plus a twenty percent (20%) handling charge to Tenant.  Tenant
shall pay such costs to Landlord as Additional Rent with the next monthly
payment of Rent.

         12.5    WAIVERS OF SUBROGATION.  Landlord waives any and all rights of
recovery against Tenant for or arising out of damage to, or destruction of the
Building or the Premises to the extent that Landlord's insurance policies then
in force or the policies required to be carried by Landlord under the terms of
this Lease, whichever is broader, insure against such damage-or destruction and
permit such waiver.  Tenant waives any and all rights of recovery against
Landlord for or arising out of damage to or destruction of any property of
Tenant to the extent that Tenant's insurance policies then in force or the
policies required by this Lease, whichever is broader, insure against such
damage or destruction.

13.      LANDLORD'S RIGHT OF ACCESS.

         Tenant shall permit Landlord and its employees and agents, at all
reasonable times upon reasonable notice and at any time (without any
requirement of notice) in case of emergency, in such manner as to cause as
little disturbance to Tenant as reasonably practicable (a) to enter into and
upon the Premises to inspect them, to protect the Landlord's interest therein,
or to post notices of non-responsibility, (b) to take all necessary materials
and equipment into the Premises, and perform necessary work therein, and (c) to
perform periodic environmental audits, inspections, investigations, testing and
sampling of the Premises and/or the Project, and to review and copy any
documents, materials, data, inventories, financial data, notices or
correspondence to or from private parties or governmental authorities in
connection therewith.  No such work shall cause or permit any rebate of Rent to
Tenant for any loss of occupancy or quiet enjoyment of the Premises, or damage,
injury or inconvenience thereby occasioned, or constitute constructive
eviction.  Landlord may at any time place on or about the Building any ordinary
"for sale" and "for lease" signs.  Tenant shall also permit Landlord and its
employees and agents, upon request, to enter the Premises or any part thereof,
at reasonable times during normal business hours, to show the Premises to any
fee owners, lessors of superior leases, holders of encumbrances on the interest
of Landlord under the Lease, or prospective purchasers, mortgagees or lessees
of the Project or Building as an entirety.  During the period of six (6) months
prior to the expiration date of this Lease, Landlord may exhibit the Premises
to prospective tenants.

14.      ASSIGNMENT AND SUBLETTING.

         14.1    LANDLORD'S CONSENT.  Tenant shall not assign all or any
portion of its interest in this Lease, whether voluntarily, by operation of law
or otherwise, and shall not sublet all or any portion of the Premises,
including, but not limited to, sharing them, permitting another party to occupy
them or granting concessions or licenses to another party, except with the
prior written consent of Landlord, which Landlord may withhold for any
reasonable condition, including, but not limited to: (a) Tenant is in default
of this Lease; (b) the assignee or subtenant is unwilling to assume in writing
all of Tenant's obligations hereunder; (c) the assignee or subtenant has a
financial condition which is reasonably unsatisfactory to Landlord or
Landlord's mortgagee; (d) the Premises will be used for different purposes than
those set forth in Paragraph 3 or for a use requiring or generating increased
or different Hazardous Materials; (e) the proposed assignee or subtenant or its
business is subject to compliance with additional requirements of the law
(including related resolutions) commonly known as the Americans with
Disabilities Act of 1990 beyond those requirements applicable to Tenant; (f)
Tenant proposes to assign less than all of its interest in this Lease or to
sublet the Premises in units





                                      -20-
   22
that are unusually small for the Project; and (g) the assignee or subtenant
requires extensive alterations to the Premises.

         14.2    FEES.  Tenant shall pay Landlord's reasonable attorneys' fees
incurred in evaluating any proposed assignment or sublease and documenting
Landlord's consent.

         14.3    PROCEDURE.  Whenever Tenant has obtained an offer to assign
any interest in this Lease or to sublease all or any portion of the Premises,
Tenant shall provide to Landlord the name and address of said proposed assignee
or sublessee, the base rent and all other compensation to be paid to Tenant,
the proposed use by the proposed assignee or sublessee, the proposed effective
date of the assignment or subletting, and any other business terms which are
material to the offer and/or which differ from the provisions of this Lease
("Notice of Offer").  Tenant shall also provide to Landlord the nature of
business, financial statement and business experience resume for the
immediately preceding five (5) years of the proposed assignee or sublessee and
such other information concerning such proposed assignee or sublessee as
Landlord may require.  The foregoing information shall be in writing and shall
be received by Landlord no less than forty-five (45) days prior to the
effective date of the proposed assignment or sublease.

                 Within thirty (30) days following its receipt of a Notice of
Offer for the proposed assignment or subletting, Landlord shall be entitled to
terminate this Lease as to all of the Premises (unless Tenant proposes a
sublease of a portion of the Premises, in which event Landlord may terminate
this Lease as to such portion) by written notice to Tenant ("Termination
Notice"), and such termination shall be effective as of the proposed effective
date of the proposed assignment or sublease.  If Landlord does not elect to
terminate this Lease, Landlord shall either notify Tenant that Landlord
consents to the proposed assignment or subletting or withholds its consent for
reasons to be specified in the notice.  If Landlord does not provide a
Termination Notice or a notice withholding its consent to Tenant within thirty
(30) days following its receipt of a Notice of Offer, Landlord shall be deemed
to have consented to the proposed assignment or subletting.

         14.4    BONUS RENT.  If any interest in this Lease is assigned or all
or any portion of the Premises is subleased, Landlord shall receive all of the
"bonus rent" to be realized from such assignment or subletting.  The bonus rent
shall mean any lump sum payment or other value received by Tenant, plus any
base rent, percentage rent or periodic compensation received by Tenant from or
for the benefit of an assignee or sublessee in excess of (a) all amounts owed
for Rent and other charges pursuant to this Lease, and (b) all reasonable
commissions and fees paid to any real estate broker or finder who is
unaffiliated with Tenant in connection with the assignment or subletting.  If a
portion of the Premises is subleased, the amount in clause (a) shall be
prorated based on the portion of the Premises, rentable area to be subleased.
The bonus rent shall be paid on the first (1st) day of each calendar month next
following tenant's receipt of each payment from its assignee or sublessee,
after reduction for all amounts described in clauses (a) and (b) above,
amortized over the full term of the assignment or sublease.

         14.5    CONTINUING TENANT OBLIGATIONS.  No subleasing or assignment
shall relieve Tenant from liability for payment of all forms of Rent and other
charges herein provided or from Tenant's obligations to keep and be bound by
the terms, conditions and covenants of this Lease.

         14.6    WAIVER, DEFAULT AND CONSENT.  The acceptance of Rent from any
other person shall not be deemed to be a waiver of any of the provisions of
this Lease or a consent to the assignment or subletting of the Premises.  Any
assignment or sublease without the Landlord's prior written consent shall be
voidable, at





                                      -21-
   23
Landlord's election, and shall constitute a noncurable event of default under
this Lease.  Consent to any assignment or subletting shall not be deemed a
consent to any future assignment or subletting.

         14.7    RESTRUCTURING OF BUSINESS ORGANIZATIONS.  Any transfer of
corporate shares or partnership interests of Tenant, so as to result in a
change in the present voting control of Tenant by the person or persons owning
a majority of said corporate shares or partnership interests on the date of
this Lease (except for trading on an exchange), shall constitute an assignment
and shall be subject to the provisions of this Paragraph 14.  Notwithstanding
the foregoing, an assignment of this Lease by operation of law as a result of a
merger or consolidation of Tenant, or an assignment of this Lease in
conjunction with (i) the sale of all or substantially all of Tenant's assets,
or (ii) a public offering of the stock of Tenant, shall not constitute an
assignment of this Lease under this Paragraph 14, provided that, and only so
long as, the surviving tenant or assignee has a net worth greater than or equal
to that of Tenant as of the date hereof.  Notwithstanding the foregoing, an
assignment of this Lease to an entity ("Affiliate Entity") which owns, or is
owned by, Tenant, shall not constitute an assignment of this Lease under this
paragraph 14, provided that (a) such entity owns more than fifty percent (50%)
of the outstanding shares of all classes of voting stock of Tenant, or Tenant
owns more than fifty percent (50%) of all ownership and controlling interests
of such assignee, and (b) in either such case, the assignee has a net worth
greater than or equal to that of Tenant as of the date hereof.

         14.8    ASSIGNMENT OF SUBLEASE RENT.  Tenant immediately and
irrevocably assigns to Landlord, as security for Tenant's obligations under
this Lease, all rents from any subletting of all or any part of the Premises,
and Landlord, as assignee and as attorney-in-fact for Tenant for purposes
hereof, or a receiver for Tenant appointed on Landlord's application, may
collect such rents and apply same toward Tenant's obligations under this Lease,
except that, until the occurrence of an event of default by Tenant, Tenant
shall have the right and license to collect such rents.

         14.9    ASSIGNMENT IN BANKRUPTCY.  If this Lease is assigned to any
person or entity pursuant to the provisions of the United States Bankruptcy
Code, 11 U.S.C. Section 101 et seq., or such similar laws or amendments thereto
which may be enacted from time to time (the "Bankruptcy Code"), any and all
monies or other considerations payable or otherwise to be delivered in
connection with such assignment shall be paid or delivered to Landlord, shall
be and remain the exclusive property of Landlord and shall not constitute
property of Tenant or of the estate of Tenant within the meaning of the
Bankruptcy Code.  Any and all monies or other considerations constituting
Landlord's property under the preceding sentence not paid or delivered to
Landlord shall be held in trust for the benefit of Landlord and be promptly
paid or delivered to Landlord.

         14.10   ASSUMPTION OF OBLIGATIONS.  Any person or entity to which this
Lease is assigned pursuant to the provisions of the Bankruptcy Code shall be
deemed, without further act or deed, to have assumed all of the obligations
arising under this Lease on and after the date of such assignment.  Any such
assignee shall upon demand execute and deliver to Landlord an instrument
confirming such assumption.

15.      CONDEMNATION.

         15.1    TOTAL TAKING.  If the whole or any substantial part of the
Premises or the Project shall be taken or damaged because of the exercise of
the power of eminent domain, whether by condemnation proceedings or otherwise,
including acts or omissions constituting inverse condemnation, or any transfer
of





                                      -22-
   24
the Premises or Project or portion thereof in avoidance of the exercise of the
power of eminent domain (collectively, a "Taking"), and the Taking would
prevent or materially interfere with the use of the Premises for the purpose
for which they are being used, this Lease shall terminate effective when the
physical Taking of the Premises shall occur.

         15.2    PARTIAL TAKING.  If part of the Premises shall be subject to a
Taking and this Lease is not terminated as provided in the Paragraph 15.1
above, this Lease shall not terminate but the Rent payable hereunder during the
unexpired portion of this Lease shall be reduced in proportion to the area of
the Premises rendered unusable by Tenant.

         15.3    CONDEMNATION AWARD.  The entire award or compensation for any
Taking of the Project and/or the Premises, or any part thereof, or for
diminution in value, shall be the property of Landlord, and Tenant hereby
assigns its interest in any such award to Landlord; provided, however, Landlord
shall have no interest in any separate award made to Tenant for loss of
business, for relocation purposes, or for the taking of Tenant's fixtures and
improvements.

         15.4    EXCLUSIVE REMEDY.  This Paragraph 15 shall be Tenant's sole
and exclusive remedy in the event of any Taking.  Tenant hereby waives the
benefits of California Code of Civil Procedure Section 1265.130 or any other
statute granting Tenant specific rights in the event of a Taking which are
contrary to the provisions of this Paragraph 15.

16.      SURRENDER AND HOLDING OVER.

         16.1    SURRENDER.  Upon the expiration or sooner termination of this
Lease, Tenant shall surrender the Premises in as good condition as when
received, reasonable wear and tear excepted, broom clean and free of trash and
rubbish, and free from all tenancies or occupancies by any person.  Tenant
shall remove all trade fixtures, furniture, equipment and other personal
property installed in the Premises prior to the expiration or earlier
termination of this Lease.  Unless otherwise provided in Paragraph 7 or waived
by Landlord in writing prior to the expiration or earlier termination of this
Lease, Tenant shall remove at its sole cost all alterations, additions and
improvements (other than the Tenant Improvements, as set forth in the plans
delivered by Tenant and received by Landlord prior to the date of this Lease)
made by Tenant to the Premises; provided, however, Landlord shall, upon
Tenant's written request therefor, notify Tenant in writing at the time of
Landlord's written consent (if applicable) whether Landlord will require the
removal of such alterations.  Alterations, additions and improvements remaining
on the Premises at the expiration or earlier termination of this Lease shall
become the property of Landlord.  Tenant shall, at its own cost, completely
repair any and all damage to the Premises and the Building resulting from or
caused by such removal.  The provisions of Paragraph 7 shall apply to such
removal and repair work.

         16.2    HOLDING OVER.  If Landlord agrees in writing that Tenant may
hold over after the expiration or earlier termination of this Lease, unless the
parties hereto otherwise agree in writing as to the terms of such holding over,
the holdover tenancy shall be subject to termination by Landlord or Tenant at..
any time upon not less than thirty (30) days, prior written notice.  If Tenant
holds over without the consent of Landlord, the same shall be a tenancy at will
terminable at any time, and Tenant shall be liable to Landlord for, and Tenant
shall indemnify, protect, defend and hold Landlord harmless from and against,
any damages, liabilities, losses, costs, expenses or claims suffered or caused
by such holdover, including damages and costs related to any successor tenant
of the Premises to whom Landlord could not deliver possession of the Premises
when promised.  All of the other terms and provisions of this Lease





                                      -23-
   25
shall be applicable during any holdover period, with or without consent, except
that Tenant shall pay to Landlord from time to time upon demand, as Rent for
the period of any holdover, an amount equal to one hundred fifty percent (150%)
of the then applicable Base Rent plus all Additional Rent in effect on the
termination date, computed on a daily basis for each day of the holdover
period.  No holding over by Tenant, whether with or without consent of
Landlord, shall operate to extend this Lease.  The preceding provisions of this
Paragraph 16.2 shall not be construed as Landlord's consent to any holding over
by Tenant.

         16.3    ENTRY AT END OF TERM.  If during the last month of the Term,
Tenant shall have removed substantially all of Tenant's property and personnel
from the Premises, Landlord may enter the Premises and repair, alter and
redecorate the same, without abatement of Rent and without liability to Tenant,
and such acts shall have no effect on this Lease.  Tenant shall give written
notice to Landlord at least thirty (30) days prior to vacating the Premises and
shall arrange to meet with Landlord for a joint inspection of the Premises
prior to vacating.  In the event of Tenant's failure to give such notice or
arrange such joint inspection, Landlord's inspection at or after Tenant's
vacation of the Premises shall be conclusively deemed correct for purposes of
determining Tenant's responsibility for repairs and restoration.

17.      QUIET ENJOYMENT.

         Landlord represents and warrants that it has full rights and authority
to enter into this Lease and that Tenant, upon paying the Rent and performing
its other covenants and agreements herein set forth, shall peaceably and
quietly have, hold and enjoy the Premises for the Term without hindrance or
molestation from Landlord, subject to the terms and provisions of this Lease,
any ground lease, any mortgage or deed of trust now or hereafter encumbering
the Premises or the Project, and all matters of record.

18.      EVENTS OF DEFAULT.

         The following events shall be deemed to be events of default by Tenant
under this Lease:

         18.1    FAILURE TO PAY RENT.  Tenant shall fail to pay any installment
of the Rent herein reserved within five (5) days following written notice that
Rent is due, or any other payment or reimbursement to Landlord required herein
within five (5) days following written notice that Rent is due.

         18.2    INSOLVENCY.  Tenant or any guarantor of Tenant's obligations
hereunder shall generally not pay its debts as they become due or shall admit
in writing the inability to pay its debts or shall make a general assignment
for the benefit of creditors.

         18.3    APPOINTMENT OF RECEIVER.  A receiver or trustee (or similar
official) shall be appointed for all or substantially all of the assets of
Tenant.

         18.4    BANKRUPTCY.  The filing of any voluntary petition by Tenant
under the Bankruptcy Code, or the filing of an involuntary petition by Tenant's
creditors, which involuntary petition remains undischarged for a period of
forty-five (45) days.

         18.5    ATTACHMENT.  The attachment, execution or other judicial
seizure or non-judicial seizure of all or substantially all of Tenant's assets
located at the Premises or of Tenant's interest in this Lease or the Premises,
if such attachment or other seizure remains undismissed or undischarged for a
period of ten (10) business days after the levy thereof.

         18.6    INTENTIONALLY OMITTED.





                                      -24-
   26
         18.7    CERTIFICATES.  Tenant shall fail to deliver to Landlord any
subordination agreement within the time limit prescribed iii Paragraph 21
below, or a Certificate of occupancy, all financial statements or an estoppel
certificate within the time limits prescribed in Paragraph 22.7 below.

         18.8    FAILURE TO DISCHARGE LIENS.  Tenant shall fail to discharge
any lien placed upon the Premises in violation of Paragraph 8 hereof.

         18.9    FALSE FINANCIAL STATEMENT.  Landlord discovers that any
financial statement given to Landlord by Tenant, any assignee, subtenant or
successor in interest of Tenant, or any guarantor of Tenant's obligations
hereunder, or any of them, was materially false when given to Landlord.

         18.10   FAILURE TO COMPLY WITH LEASE TERMS.  Tenant shall fail to
comply with any other term, provision or covenant of this Lease, and shall not
cure such failure within twenty (20) days after written notice thereof to
Tenant; provided, however, if the nature of the obligation is such that it
cannot be cured within twenty (20) days, Tenant shall not be in default so long
as it commences performance of such cure with all diligence (and in no event
later than 20 days) and thereafter diligently prosecutes the same to
completion.

19.      LANDLORD'S REMEDIES.

         Upon the occurrence of any event of default, Landlord may, at its
option without further notice or demand and in addition to any other rights and
remedies hereunder or at law or in equity, do any or all of the following:

         19.1    TERMINATION.  Terminate Tenant's right to possession of the
Premises by any lawful means upon at least 3 days' written notice (which notice
may be satisfied by any notice which may be given by Landlord pursuant to
Paragraph 18, if applicable), in which case Tenant shall immediately surrender
possession of the Premises to Landlord and, in addition to any rights and
remedies Landlord may have at law or in equity, Landlord shall have the
following rights:

                 (a)      To re-enter the Premises then or at any time
                 thereafter and remove all persons and property and possess the
                 Premises, without prejudice to any other remedies Landlord may
                 have by reason of Tenant's default or of such termination, and
                 Tenant shall have no further claim hereunder.

                 (b)      To recover all damages incurred by Landlord by reason
                 of the default, including without limitation (i) the worth at
                 the time of the award of the payments owed by Tenant to
                 Landlord under this Lease that were earned but unpaid at the
                 time of termination; (ii) the worth at the time of the award
                 of the amount by which the payments owed by Tenant to Landlord
                 under the Lease that would have been earned after the date of
                 termination until the time of the award exceeds the amount of
                 the loss of payments owed by Tenant to Landlord under this
                 Lease for the same period that Tenant proves could have been
                 reasonably avoided; (iii) the worth at the time of the award
                 of the amount by which the payments owed by Tenant to Landlord
                 for the balance of the Term after the time. of the award
                 exceeds the amount of the loss of payments owed by Tenant for
                 the same period that Tenant proves could have been reasonably
                 avoided; (iv) all costs incurred by Landlord in retaking
                 possession of the Premises and restoring them to good order
                 and condition; (v) all costs, including without limitation
                 brokerage commissions, advertising costs and restoration and
                 remodeling costs, incurred by





                                      -25-
   27
                 Landlord in reletting the Premises; plus (vi) any other
                 amount, including without limitation reasonable attorneys'
                 fees and audit expenses, necessary to compensate Landlord for
                 all 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.
                 "The worth at the time of the award," as used in clauses (i)
                 and (ii) of this paragraph, is to be determined by computing
                 interest as to each unpaid payment owed by Tenant to Landlord
                 under the Lease, at the highest interest rate permitted by
                 law.  "The worth at the time of the award," as referred to in
                 clause (iii) of this paragraph, is to be determined by
                 discounting such amount, as of the time of award, at the
                 discount rate of the San Francisco Federal Reserve Bank, plus
                 1%.

                 (c)      To remove, at Tenant's sole risk, any and all
                 personal property in the Premises and place such in a public
                 or private warehouse or elsewhere at the sole cost and expense
                 and in the name of Tenant.  Any such warehouser shall have all
                 of the rights and remedies provided by law against Tenant as
                 owner of such property.  If Tenant shall not pay the cost of
                 such storage within thirty (30) days following Landlord's
                 demand, Landlord may, subject to the provisions of applicable
                 law, sell any or all such property at a public or private sale
                 in such manner and at such times and places as Landlord deems
                 proper, without notice to or demand upon Tenant.  Tenant
                 waives all claims for damages caused by Landlord's removal,
                 storage or sale of the property and shall indemnify and hold
                 Landlord free and harmless from and against any and all loss,
                 cost and damage, including without limitation court costs and
                 attorneys' fees.  Tenant hereby irrevocably appoints Landlord
                 as Tenant's attorney-in-fact, coupled with an interest, with
                 all rights and powers necessary to effectuate the provisions
                 of this subparagraph.

         19.2    CONTINUATION OF LEASE.  Maintain Tenant's right to possession,
in which case this Lease shall continue in effect whether or not Tenant shall
have abandoned the Premises.  In such event, Landlord may enforce all of
Landlord's rights and remedies under this Lease, including the right to recover
rent as it becomes due hereunder, and, at Landlord's election, to re-enter and
relet the Premises on such terms and conditions as Landlord deems appropriate.
Without limiting the generality of the foregoing, Landlord shall have the
remedy described in 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).  If Landlord relets the Premises or any portion
thereof, any rent collected shall be applied against amounts due from Tenant.
Landlord may execute any lease made pursuant hereto in its own name, and Tenant
shall have no right to collect any such rent or other proceeds.  Landlord's
reentry and/or reletting of the Premises, or any other acts, shall not be
deemed an acceptance of surrender of the Premises or Tenant's interest therein,
a termination of this Lease or a waiver or release of Tenant's obligations
hereunder.  Landlord shall have the same rights with respect to Tenant's
improvements and personal property as under Paragraph 19.1 above, even though
such re-entry and/or reletting do not constitute acceptance of surrender of the
Premises or termination of this Lease.

         19.3    APPOINTMENT OF RECEIVER.  Cause a receiver to be appointed in
any action against Tenant and to cause such receiver to take possession of the
Premises and to collect the rents or bonus rent derived therefrom.  The
foregoing shall not constitute





                                      -26-
   28
an election by Landlord to terminate this Lease unless specific notice of such
intent is given.

         19.4    LATE CHARGE.  Subject to the terms of Paragraph 2.7, charge
late charges.

         19.5    INTEREST.  Subject to the terms of Paragraph 22.2, charge
interest on any amount not paid when due.  Interest shall accrue from the date
funds are first due or, if the payment is for funds expended by Landlord on
Tenant's behalf, from the date Landlord expends such funds.

         19.6    ATTORNEYS' FEES.  Collect, upon demand, all reasonable
attorneys' fees and expenses incurred by Landlord in enforcing its rights and
remedies hereunder.

         19.7    INJUNCTION.  To restrain by injunction or other equitable
            means any breach or anticipated breach of this Lease.

20.      TENANT'S REMEDIES.

         20.1    LANDLORD'S DEFAULT.  Landlord shall not be in default under
this Lease unless Landlord fails to perform obligations required of Landlord
within sixty (60) days after written notice is delivered by Tenant to Landlord
and to the holder of any mortgages or deeds of trust (collectively, "Lender")
covering the Premises whose name and address shall have theretofore been
furnished to Tenant in writing, specifying the obligation which Landlord has
failed to perform; provided, however, that if the nature of Landlord's
obligation is such that more than sixty (60) days are required for performance,
then Landlord shall not be in default if Landlord or Lender commences
performance within such sixty (60) day period and thereafter diligently
prosecutes the same to completion.  All obligations of Landlord hereunder shall
be construed as covenants, not conditions.

         20.2    TENANT'S REMEDIES.  In the event of any default, breach or
violation of Tenant's rights under this Lease by Landlord, Tenant's exclusive
remedies shall be an action for specific performance or action for actual
damages.  Tenant hereby waives the benefit of any laws granting it the right to
perform Landlord's obligation, a lien upon the property of Landlord and/or upon
Rent due Landlord, or the right to terminate this Lease or withhold Rent on
account of any Landlord default.  Notwithstanding the foregoing, if Landlord
fails to make any repair required of Landlord under this Lease within the time
period specified in Paragraph 20.1 above, then five (5) business days following
Landlord's receipt of a new written notice from Tenant stating that such
failure remains uncured (and provided such cure has not then been performed),
Tenant may cause such repairs (other than work affecting the structural
integrity of the Building) to be made, and Landlord shall reimburse Tenant for
the reasonable cost thereof within thirty (30) days of Landlord's receipt of
paid invoices for such repairs.

         20.3    NON-RECOURSE.  Notwithstanding anything to the contrary in
this Lease, any judgment obtained by Tenant or any of Tenant's Parties against
Landlord or any Indemnified Parties shall be satisfied only out of Landlord's
interest in the Building and the legal parcel of land on which it sits.
Neither Landlord nor any Indemnified Parties shall have any personal liability
for any matter in connection with this Lease or its obligations as Landlord of
the Premises, except as provided above.  Tenant shall not institute, seek or
enforce any personal or deficiency judgment against Landlord or any Indemnified
Parties, and none of their property shall be available to satisfy any judgment
hereunder, except as provided in this Paragraph 20.3.

         20.4    SALE OF PREMISES.  In the event of any sale or transfer of the
Premises (and provided that any security deposit held by the seller, transferor
or assignor (collectively,





                                      -27-
   29
"Seller") is delivered or credited to the purchaser, transferee or assignee
(collectively, "Purchaser"), the Seller shall be and hereby is entirely freed
and relieved of all agreements, covenants and obligations of Landlord
thereafter to be performed and it shall be deemed and construed without further
agreement between the parties or their successors in interest or between the
Seller and the Purchaser on any such sale, transfer or assignment that such
Purchaser has assumed and agreed to carry out any and all agreements, covenants
and obligations of Landlord hereunder.

21.      MORTGAGES.

         Tenant accepts this Lease subject and subordinate to any ground lease,
mortgage and/or deed of trust now or at any time hereafter constituting a lien
or encumbrance upon the Premises; provided, however, with respect to future
mortgages, such subordination is conditioned upon Tenant receiving a
nondisturbance agreement (on such mortgagee's then standard form).
Notwithstanding any such subordination, Tenant's right to quiet possession of
the Premises shall not be disturbed if Tenant is not in default and so long as
Tenant shall pay the Rent and observe and perform all of its obligations
hereunder, unless this Lease is otherwise terminated pursuant to its terms.  If
any ground lessor, mortgagee or beneficiary under a deed of trust elects to
have Tenant's interest in this Lease superior to any such instrument, then by
notice to Tenant from such ground lessor, mortgagee or beneficiary, this Lease
shall be deemed superior to such ground lease or lien, whether this Lease was
executed before or after said ground lease, mortgage or deed of trust.  Tenant
shall at any time hereafter on demand execute any instruments, releases or
other documents which may be required by any ground lessor or mortgagee for the
purpose of attornment or subjecting and subordinating this Lease to any ground
lease or the lien of any such mortgage; provided, however, the foregoing
obligation of Tenant to execute a subordination agreement is conditioned upon
such subordination agreement also containing a nondisturbance provision.
Tenant's failure to execute each instrument, release or document within ten
(10) days after written demand shall constitute an event of default by Tenant
hereunder without further notice to Tenant, or at Landlord's option Landlord
shall execute such instrument, release or document on behalf of Tenant as
Tenant's attorney-in-fact.  Tenant does hereby make, constitute and irrevocably
appoint Landlord as Tenant's attorney-in-fact, coupled with an interest, and
in Tenant's name, place and stead, to execute such documents in accordance with
this Paragraph 21.  Landlord hereby agrees to use all commercially reasonable
efforts to provide Tenant, within forty-five (45) days following the mutual
execution and delivery of this Lease (the "SNDA Outside Date"), with a
subordination, nondisturbance and attornment agreement ("SNDA") from the
current beneficiary of the deed of trust encumbering the Building, provided
that Landlord's sole obligation shall be to provide the SNDA on such current
beneficiary's then current standard form.  If Landlord is unable to deliver the
SNDA to Tenant on or before the SNDA Outside Date, and such failure is not due
in whole or in part to any act or omission of Tenant or Tenant's Parties, then
for each day of delay in Landlord's delivery to Tenant of the SNDA beyond the
SNDA Outside Date which actually causes a delay in the construction of the
Tenant Improvements, the Commencement Date shall be delayed by one (1) day.

22.      GENERAL PROVISIONS.

         22.1    SINGULAR AND PLURAL.  Words of any gender used in this Lease
shall be held and construed to include any other gender, and words in the
singular number shall be held to include the plural, unless the context
otherwise requires.

         22.2    INTEREST ON PAST-DUE OBLIGATIONS.  Except as expressly herein
provided to the contrary, any amount due to Landlord not paid within five (5)
days from when due shall bear





                                      -28-
   30
interest at the maximum rate then allowable by law from the date due.  Payment
of such interest shall not excuse or cure any default by Tenant under this
Lease, provided, however, that interest shall not be payable on late charges
incurred by Tenant.

         22.3    TIME OF ESSENCE.  Time is of the essence.

         22.4    BINDING EFFECT.  The terms, provisions and covenants and
conditions contained in this Lease shall apply to, inure to the benefit of, and
be binding upon, the parties hereto and upon their respective heirs, legal
representatives, successors and permitted assigns, except as otherwise herein
expressly provided.

         22.5    CHOICE OF LAW.  This Lease shall be governed by the laws of
the State of California applicable to contracts made and to be performed in
such state.

         22.6    CAPTIONS.  The captions inserted in this Lease are for
convenience only and in no way define, limit or otherwise describe the scope or
intent of this Lease, or any provision hereof, or in any way affect the
interpretation of this Lease.

         22.7    CERTIFICATES.  Tenant agrees from time to time within ten (10)
days after request of Landlord, to deliver to Landlord, or Landlord's designee,
a Certificate of Occupancy for work performed by Tenant or Tenant's Parties in
the Premises, annual financial statements for each of the previous three (3)
fiscal years of Tenant, and an estoppel certificate stating that this Lease is
unmodified and in full force and effect (or, if modified, stating the nature of
such modification and certifying that this Lease, as so modified, is in full
force and effect), the date to which Rent has been paid, the unexpired Term of
this Lease and such other matters pertaining to this Lease as may be requested
by Landlord or Landlord's designee.  Any such certificate may be conclusively
relied upon by Landlord or Landlord's designee.  At Landlord's option, Tenant's
failure to timely deliver such certificate shall be an event of default by
Tenant, without further notice to Tenant, or it shall be conclusive upon Tenant
that this Lease is in full force and effect, without modification except as may
be represented by Landlord, that there are no uncured defaults in Landlord's
performance, and that not more than one (1) month's rent has been paid in
advance.

         22.8    AMENDMENTS.  This Lease may not be altered, changed or amended
except by an instrument in writing signed and dated by both parties hereto.
Tenant agrees to make such reasonable modifications to this Lease as may be
required by any lender in connection with the obtaining of financing or
refinancing of the Project or any portion thereof.

         22.9    ENTIRE AGREEMENT.  This Lease constitutes the entire
understanding and agreement of Landlord and Tenant with respect to the subject
matter of this Lease, and contains all of the covenants and agreements of
Landlord and Tenant with respect thereto, and supersedes all prior agreements
or understandings.  Landlord and Tenant each acknowledge that no
representations, inducements, promises or agreements, oral or written, have
been made by Landlord or Tenant, or anyone acting on behalf of Landlord or
Tenant, which are not contained herein, and any prior agreements, promises,
negotiations, or representations not expressly set forth in this Lease are of
no force or effect.

         22.10   WAIVERS.  The waiver by Landlord of any term, covenant,
agreement or condition herein contained shall not be deemed to be a waiver of
any subsequent breach of the same or any other term, covenant, agreement or
condition herein contained, nor shall any custom or practice which may arise
between the parties in the administration of this Lease be construed to waive
or lessen the right of Landlord to insist upon the performance by Tenant in
strict accordance with all of the provisions of this Lease.  The subsequent
acceptance of Rent hereunder by Landlord





                                      -29-
   31
shall not be deemed to be a waiver of any preceding breach by Tenant of any
provisions, covenant, agreement or condition of this Lease, other than the
failure of Tenant to pay the particular Rent so accepted, regardless of
Landlord's knowledge of such preceding breach at the time of acceptance of such
Rent.

         22.11   ATTORNEYS' FEES.  If either Landlord or Tenant commences or
engages in, or threatens to commence or engage in, an action by or against the
other party arising out of or in connection with this Lease or the Premises,
including but not limited to any action for recovery of Rent due and unpaid, to
recover possession or for damages for breach of this Lease, the prevailing
party shall be entitled to have and recover from the losing party reasonable
attorneys' fees and other costs incurred in connection with the action,
preparation for such action, any appeals relating thereto and enforcing any
judgments rendered in connection therewith.  If Landlord becomes involved in
any action, threatened or actual, by or against anyone not a party to this
Lease, but arising by reason of or related to any act or omission of Tenant or
Tenant's Parties, Tenant agrees to pay Landlord's reasonable attorneys, fees
and other costs incurred in connection with the action, preparation for such
action, any appeals relating thereto and enforcing any judgments rendered in
connection therewith.

         22.12   MERGER.  The voluntary or other surrender of this Lease by
Tenant or a mutual cancellation hereof shall not constitute a merger.  Such
event shall, at the option of Landlord, either terminate all or any existing
subtenancies or operate as an assignment to Landlord of any or all of such
subtenancies.

         22.13   SURVIVAL OF OBLIGATIONS.  Paragraphs 2, 3.2, 4.2, 5.2, 8,
12.1, 12.5, 15.3, 16, 19, 20 and 22 and all obligations of Tenant hereunder not
fully performed as of the expiration or earlier termination of the Term shall
survive the expiration or earlier termination of the Term, including without
limitation, all payment obligations with respect to Rent and all obligations
concerning the condition of the Premises.  Upon the expiration or earlier
termination of the Term, and prior to Tenant vacating the Premises, Tenant
shall pay to Landlord any amount reasonably estimated by Landlord (i) as
necessary to perform Tenant's duties under paragraphs 6.1 and 16.1 and put the
Premises, including without limitation, all heating and air conditioning
systems and equipment therein, in good condition and repair, and (ii) as
sufficient to meet Tenant's obligation hereunder for prorated Additional Rent
for the year in which the Lease expires or terminates.  All such amounts shall
be used and held by Landlord for payment of such obligations, with Tenant being
liable for any additional costs therefor upon demand by Landlord, or with any
excess to be returned to Tenant after all such obligations have been determined
and satisfied as the case may be.  Any Security Deposit held by Landlord shall
be credited against the amounts payable by Tenant under this Paragraph 22.13.

         22.14   SEVERABILITY.  If any clause or provision of this Lease is
illegal, invalid or unenforceable under present or future laws effective during
the Term, the remainder of this Lease shall not be affected thereby, and in
lieu of each clause or provision of this Lease that is illegal, invalid or
unenforceable, there shall be added as a part of this Lease a clause or
provision as similar in terms to such illegal, invalid or unenforceable clause
or provision as may be possible and be legal, valid and enforceable.

         22.15   SECURITY MEASURES.  Tenant hereby acknowledges that the Rent
payable to Landlord hereunder does not include the cost of guard service or
other security measures, and that Landlord shall have no obligation whatsoever
to provide same.  Tenant assumes all responsibility for the protection of
Tenant, Tenants' Parties and their property from acts of third parties.





                                      -30-
   32
         22.16   EASEMENTS.  Landlord reserves to itself the right, from time
to time, to grant such easements, rights and dedications that Landlord deems
necessary or desirable, and to cause the recordation of parcel maps, easement
agreements and covenants, conditions and restrictions, so long as such
easements, rights, dedications, maps and covenants, conditions and restrictions
do not unreasonably interfere with the permitted use of the Premises by Tenant.
Tenant shall sign any of the aforementioned documents upon request of Landlord
and failure to do so shall constitute a material breach of this Lease.

         22.17   MULTIPLE PARTIES.  If more than one person or entity is named
as Tenant herein, the obligations of Tenant hereunder shall be the joint and
several responsibility of all persons or entities so named.

         22.18   CONFLICT.  Any conflict between the printed provisions of this
Lease and any typewritten or handwritten provisions shall be controlled by the
typewritten or handwritten provisions.

         22.19   NO THIRD PARTY BENEFICIARIES.  This Lease is not intended by
either party to confer any benefit on any third party, including without
limitations any broker, finder, or brokerage firm.

         22.20   EFFECTIVE DATE/NONBINDING OFFER.  Submission of this Lease for
examination or signature by Tenant does not constitute an offer or option for
lease, and it is not effective as a lease or otherwise until executed and
delivered by both Landlord and Tenant.

         22.21   NOTICES.  Each provision of this Lease or of any applicable
governmental laws, ordinances, regulations and other requirements with
reference to the sending, mailing or delivery of any notice or the making of
any payment by one party to the other shall be deemed to be complied with when
and if the following steps are taken:

                 (a)      All Rent and other Payments required to be made
hereunder shall be payable to the applicable party hereto as follows: to
Landlord at the address set forth in Item 12 of the Basic Lease Provisions, and
to Tenant at the Premises, or at such other addresses as the parties may have
hereafter specified by written notice.  All obligations to pay Rent and/or any
other amounts under the terms of this Lease shall not be deemed satisfied until
such Rent and other amounts have been actually received by the respective
party.

                 (b)      Wherever any notice is required or permitted
hereunder, such notice shall be in writing.  Any notice or document required or
permitted to be delivered hereunder shall be deemed to be delivered (i) upon
personal delivery; (ii) seventy-two (72) hours after deposit thereof in the
United States mail, postage prepaid, certified or registered mail, return
receipt requested; (iii) upon confirmation of delivery by Federal Express or
other reputable overnight delivery service; or (iv) upon written confirmation
of delivery by telegraph, telecopy or other electronic written transmission
device; correctly addressed to the parties hereto as follows: if to Tenant
before the Commencement Date, then at the address specified in Item 11 of the
Basic Lease Provisions; if to Tenant after the Commencement Date, then at the
Premises; and if to Landlord, then at the address specified in Item 12 of the
Basic Lease Provisions; or at such other address (but no more than one (1)
address at a time, except as provided in Paragraph 20.1) as the recipient may
theretofore have specified by written notice.

         22.22   WATER, OIL AND MINERAL RIGHTS.  Landlord reserves all right,
title or interest in water, oil, gas or other hydrocarbons, other mineral
rights and air and development rights, together with the sole and exclusive
right of Landlord to





                                      -31-
   33
sell, lease, assign or otherwise transfer the same, but without any right of
Landlord or any such transferee to enter upon the Premises during the Term
except as otherwise provided herein.

         22.23   CONFIDENTIALITY.  Tenant agrees to keep the Lease and its
terms, covenants, obligations and conditions strictly confidential and not to
disclose such matters to any other landlord, tenant, prospective tenant, or
broker; provided, however, Tenant may provide a copy of this Lease to its
attorneys, accountants and bankers, and to a non-party solely in conjunction
with Tenant's reasonable and good faith effort to secure an assignee or
sublessee for the Premises.

         22.24   BROKER'S FEES.  Tenant represents and warrants that it has
dealt with no broker, agent or other person in connection with this transaction
and that no broker, agent or other person brought about this transaction, other
than the brokerage firm specified in Item 13 of the Basic Lease Provisions, if
any, and Tenant shall indemnify, defend, protect and hold Landlord harmless
from and against any claims, losses, liabilities, demands, costs, expenses or
causes of action by any other broker, agent or other person claiming a
commission or other form of compensation by virtue of having dealt with Tenant
with regard to this leasing transaction.

         22.25   REMEDIES CUMULATIVE.  All rights, privileges and remedies of
the parties are cumulative and not alternative or exclusive to the extent
permitted by law, except as otherwise provided herein.

         22.26   RETURN OF CHECK.  If Tenant's check, given to Landlord in
payment of any sum, is returned by the bank for nonpayment, Tenant shall pay to
Landlord immediately on demand, as Additional Rent, all expenses incurred by
Landlord as a result thereof.

         22.27   NO RECORDATION OF LEASE.  Neither this Lease nor any
memorandum hereof may be recorded.

         22.28   AUTHORITY.  If Tenant is a corporation or partnership, each
individual executing this Lease on behalf of such entity represents and
warrants that he or she is duly authorized to execute and deliver this Lease.
Tenant shall, within thirty (30) days following execution of this Lease,
deliver to Landlord evidence of such authority satisfactory to Landlord.

         22.29   INTERPRETATION.  This Lease shall be construed fairly
according to its terms without regard to which party, or which party's
attorneys, prepared its form.

         22.30   LANDLORD'S APPROVALS.  Except where the provisions of this
Lease expressly provide that Landlord's consent or approval must be reasonably
given, all consents or approvals of Landlord sought or required pursuant to the
terms of this Lease may be given or withheld in Landlord's sole and absolute
discretion.





                                      -32-
   34
         22.31   ADDITIONAL PROVISIONS.  Those additional provisions set forth
in Exhibit "C", if any, are hereby incorporated by this reference as if fully
set forth herein.


LANDLORD:
           TCEP II PROPERTIES JOINT VENTURE, a Texas joint venture

           By: TCEP II Properties/First Plaza Limited Partnership, 
               a Texas limited partnership, Co-Venturer

               By: TCV/TCEP II Properties Limited Partnership, 
                   a Texas limited partnership, General Partner

                   By: Trammell Crow Ventures #3, Ltd., a Texas 
                       limited partnership, General Partner

                       By: Trammell Crow Ventures Management Company, Inc., 
                           a Texas corporation, General Partner

                           By:  /s/ JEFFREY C. CHAVEZ
                           Name:    JEFFREY C. CHAVEZ
                           Title:    VICE PRESIDENT


           By: Trammell Crow Equity Partners II, Ltd., a Texas limited 
               partnership Co-Venturer

               By: Trammell Crow Ventures #2, Ltd., a Texas limited 
                   partnership, General Partner

                   By: Trammell Crow Ventures #3, Ltd., a Texas 
                       limited partnership, General Partner

                       By: Trammell Crow Ventures Management Company, Inc., 
                           a Texas corporation, General Partner

                           By:  /s/ JEFFREY C. CHAVEZ
                           Name:     JEFFREY C. CHAVEZ
                           Title:    VICE PRESIDENT


TENANT:

                 CHAD THERAPEUTICS, INC.,
                 a California corporation

                 By:  /s/ CHARLES R. ADAMS
                 Name:   CHARLES R. ADAMS
                 Title:    CHMN./C.E.O.

                 By:  /s/ EARL L. YAGER
                 Name:  EARL L. YAGER
                 Title:  CFO





                                      -33-
   35
                                  EXHIBIT "A"


         CHAD THERAPEUTICS TOTAL PARKING SPACES (150) of  which
are DESIGNATED PARKING SPACES (75 SPACES)
                           
                                             ---------------------------------
                                             CHATSWORTH, CA


                        [REPRESENTATION OF PARKING AREA]


                            /x/   = reserved spaces
   36
                                  EXHIBIT "B"

                     WORK LETTER AND CONSTRUCTION AGREEMENT
                       (Tenant to Construct Improvements)


         1.   TENANT'S IMPROVEMENTS.

         Except as set forth in the Lease to the contrary, Tenant accepts the
Premises and existing improvements therein in their "as is" condition.  Tenant
shall, at its sole cost and expense, furnish and install within the Premises
those improvements (the "Tenant Improvements") shown on the plans and
specifications finally approved by Landlord and Tenant, pursuant to Paragraph 2
below, in compliance with all applicable codes and regulations.  All Tenant
Improvements shall be constructed pursuant to this Work Letter and shall be
performed by Tenant's general contractor utilizing those subcontractors
approved by Landlord in accordance with this Work Letter.

         2.      PLANS AND SPECIFICATIONS FOR IMPROVEMENTS.

         2.1     Tenant shall retain a licensed architect of its choice,
subject to Landlord's reasonable approval, to prepare the plans and
specifications described hereinafter for the Tenant Improvements.  The plans
and specifications shall be subject to Landlord's approval, which approval
shall not be unreasonably withheld or delayed.

         2.2     Promptly following the date of execution of the Lease by
Tenant, Tenant shall cause its architect to furnish to Landlord for Landlord's
approval space plans sufficient to convey the architectural design of the
Premises, including, without limitation, the location of doors, partitions,
electrical and telephone outlets, plumbing fixtures, heavy floor loads and
other special requirements (collectively, the "Space Plan").  If required by
Landlord, Tenant's architect shall consult with Landlord's engineer in
preparing the Space Plan and incorporate such engineer's requirements into the
Space Plan.  The fees of such engineer shall be a Cost of Tenant Improvements
(as hereafter defined).  If Landlord fails to disapprove the Space Plan within
the ten (10) day period following its receipt of the Space Plan, the Space Plan
shall be deemed approved.  If Landlord shall disapprove of any portion of the
Space Plan within such ten (10) day period, Landlord shall advise Tenant of the
reasons therefor and shall notify Tenant of the revisions to the Space Plan
that are reasonably required by Landlord for the purpose of obtaining approval.
Tenant shall thereafter promptly submit to Landlord, for Landlord's approval, a
redesign of the Space Plan, incorporating the revisions required by Landlord.
If the redesign of the Space Plan is not approved by Landlord within ten (10)
days following Landlord's receipt of same, then at Landlord's election, this
Lease may be terminated.

         2.3     Tenant shall cause its architect to prepare from Tenant's
approved Space Plan, complete architectural plans, drawings and specifications
promptly after Landlord approves the Space Plan.  Such complete plans, drawings
and specifications are referred to herein as the "Plans".  Tenant's Plans shall
(i) be compatible with the Building shell and with the design, construction and
equipment of the Building; (ii) comply with all applicable laws and ordinances,
and the rules and regulations of all governmental authorities having
jurisdiction; (iii) comply with all applicable insurance regulations, and (iv)
be consistent with the Space Plan.  Tenant shall submit the Plans for the
approval of Landlord in the same manner as provided in Subparagraph 2.2 above
for approval by Landlord of Tenant's Space Plan.

         2.4     Tenant shall cause its architect to provide documentation for
all changes to the Plans at the time each change is authorized for
construction, pursuant to the





                                      -1-
   37
requirements of paragraph 6. At the conclusion of construction, Tenant shall
cause its architect to update Tenant's plans and specifications as necessary to
reflect all changes to the Plans during the course of construction and to issue
a set of sepias to the contractor for its review and mark up.  Tenant shall
cause its architect to review and certify the contractor's marked up plans and
provide to Landlord's designated construction representative a "record set" of
as-built sepias within thirty (30) days following completion of the Tenant
Improvements.  Landlord shall have no liability to Tenant or to any other
person for errors or omissions in the Plans, Landlord's review being for
Landlord's own purposes.  Tenant shall rely solely on the advice and experience
of Tenant's architect in assuring the accuracy and sufficiency of the Plans for
Tenant's purposes.

         3.      NON-STANDARD TENANT IMPROVEMENTS.

         3.1     Subject to obtaining Landlord's prior written consent, which
consent shall not be unreasonably withheld or delayed, Tenant may install
non-standard floor covering and wall finishes.  Such non-standard floor
covering and wall finish deviations shall not be of a lesser quality than the
improvements delivered to Tenant as of the Commencement Date.

         3.2     Landlord shall not be required to approve any non-standard
finishes that: (1) do not conform to applicable government regulations or are
disapproved by any governmental agency; or (2) are, in Landlord's reasonable
opinion, of a nature or quality that are inconsistent with the objectives of
Landlord.

         4.   BUILDING SHELL CHANGES.

         If the Plans or any amendment thereof or supplement thereto shall
require changes in the Building shell, the cost of the Building shell work
caused by such Plans, amendment or supplement, shall be charged against Tenant.
The preceding sentence shall not be construed as requiring that Landlord must
approve any Plans which specify changes in the Building shell.  If Building
shell work is permitted by Landlord, the cost thereof shall include all
architectural and/or engineering fees and expenses in connection therewith, as
well as compensation to Landlord for the costs of any delays which arise from
such changes.  Landlord shall, at its sole cost and expense, repair any defects
in the initial construction of the Building shell, and comply with any
requirements imposed by any governmental agency pertaining to the Building
shell, unless such requirements arise out of laws, codes or ordinances enacted
or effective after the Commencement Date, or out of the Tenant Improvements to
the Premises or Tenant's use of the Premises.

         5.      TENANT IMPROVEMENT APPROVAL AND COST.

         5.1     Promptly upon completion of the Plans, Tenant shall submit the
Plans to Tenant's general contractor to bid the project to subcontractors to
determine the cost of construction of the Tenant Improvements.  Tenant shall
obtain Landlord's prior approval of Tenant's general contractor and the form of
contract to be used, such approval not to be unreasonably withheld or delayed.
The general contractor and all subcontractors shall be appropriately licensed.
The subcontractors shall be chosen from a list provided by Tenant and approved
by Landlord.

         5.2     Tenant shall be solely responsible for any and all costs
incurred in connection with or otherwise arising out of the Tenant Improvements
and Tenant shall indemnify, defend, protect and hold Landlord and the
Indemnified Parties (as defined in the Lease) harmless from and against any
Claims (as defined in the Lease) suffered by Landlord (or any of the
Indemnified Parties) which arise in any way out of the construction of the
Tenant Improvements including, without limitation, any mechanics liens
resulting from Tenant's failure to timely pay the same.





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   38
         5.3     Subject to the terms of Paragraph 16.1 of the Lease, all of
the Tenant improvements shall become the property of Landlord upon expiration
or earlier termination of the Lease and shall remain on the Premises at all
times during the Term.

         6.    TENANT CHANGES.

         Tenant may request a change, addition or alteration in the Tenant
Improvements as shown by the Plans after Landlord's final approval of such
Plans (a "Change Order") by delivery of a written request to Landlord, for its
approval. Tenant's architect shall complete all working drawings necessary to
show the change, addition or alteration, and a change Order in form
satisfactory to Landlord.  Following its approval of the Change Order and any
delays in construction occasioned by the Change Order, Landlord shall deliver
to Tenant its written approval of the Change Order and authorization to proceed
with the work as shown by the Change Order.  Landlord may decline any proposed
Change Order if the change is inconsistent with the provisions of any of
paragraphs 1 through 5 above.

         7.      CONSTRUCTION OF TENANT IMPROVEMENTS.

         7.1     Upon approval by Landlord of the Plans and Tenant's general
contractor, Tenant shall cause its general contractor to proceed to secure a
building permit and commence construction.

         7.2     Subject to the terms of Paragraph 1.3 of the Lease, the
Commencement Date shall not be later than July 1, 1996, irrespective of the
date Tenant has substantially completed the Tenant Improvements.

         7.3     The construction of Tenant Improvements by Tenant and Tenant's
general contractor shall comply with all of the following:

                 (i)      Tenant shall reimburse Landlord for all costs
                          directly or indirectly related to the Tenant
                          Improvements, including, without limitation: costs of
                          site services, facilities and utilities (such as
                          trash removal, electrical service, etc.); costs of
                          remedying deficient or faulty work or inadequate
                          clean-up done by Tenant or its contractor(s).

                 (ii)     All Tenant improvements shall be installed in
                          coordination with Landlord or its designated agents.

                (iii)     Subject to the terms of Paragraph 8 of the Lease,
                          Tenant will promptly pay all contractors,
                          subcontractors and materialmen with respect to the
                          Tenant Improvements and will obtain unconditional lien
                          releases as reasonably required by Landlord within
                          thirty (30) days following Tenant's commencement of
                          business operations from the Premises.

         7.4     Tenant shall assure that Tenant's general contractor secures
the insurance specified herein, and maintains the same until substantial
completion and final acceptance of the work.  Certificates of insurance
affording evidence of same shall be obtained from Tenant's general contractor
by Tenant and delivered to Landlord prior to the commencement of any work by
Tenant's general contractor.  The required insurance coverage is as follows:

                 (i)      Worker's compensation and employer's liability
                          insurance affording 30 days' written notice of
                          cancellation to Landlord.  The employer's liability
                          minimum limits required are as follows:

                          Bodily Injury by Accident  -  $100,000 each accident
                          Bodily Injury by Disease   -  $500,000 policy limit
                          Bodily Injury by Disease   -  $100,000 each employee





                                      -3-
   39
                 (ii)     General liability insurance in the amount of
                          $2,000,000 for each occurrence for bodily injury
                          and/or property damage combined, written on an
                          occurrence basis and including:

                          (a)     Premises and operations coverage with X, C
                                  and U exclusions deleted, if any.

                          (b)     Owner's and contractor's protective coverage.

                          (c)     Products and completed operations coverage.

                          (d)     Blanket contractual coverage.

                          (e)     Personal injury coverage.

                          (f)     Broad form property damage coverage,
                                  including completed operations.

                          (g)     An endorsement naming Landlord as additional
                                  insured.

                          (h)     An endorsement affording 30 days' prior
                                  written notice to Landlord in the event of
                                  cancellation or nonrenewal.

                          (i)     An endorsement providing that such insurance
                                  as is afforded under such policy is primary
                                  insurance as respects Landlord, and that any
                                  other insurance maintained by Landlord is
                                  excess and noncontributing with the insurance
                                  required hereunder.

                          (j)     An endorsement which states that the general
                                  aggregate limit applies separately to each
                                  project away from the premises owned by or
                                  rented to Tenant's general contractor.

                 No endorsement limiting or excluding a required coverage shall 
be permitted.  No deductible in excess of $5,000 per occurrence shall be
permitted.  Tenant's general contractor shall be responsible for payment of any
deductible.  Claims-made coverage shall not be acceptable.

                 (iii)    Business auto liability insurance written in the
                          amount of $2,000,000 for each occurrence for bodily
                          injury and/or property damage liability combined,
                          including:

                          (a)     Owned autos;

                          (b)     Hired autos;

                          (c)     Non-owned autos; and

                          (d)     An endorsement affording 30 days, prior
                                  written notice to Landlord in the event of
                                  cancellation or nonrenewal.

                 A certificate and endorsements affording evidence of the
coverage required under paragraphs (i) through (iii) must be delivered to
Landlord before Tenant's general contractor performs any work at or prepares or
delivers materials to the construction site.  Tenant shall require its general
contractor to cause its subcontractors to provide insurance where Tenant's
general contractor would be required to carry insurance under this insurance
section and to be responsible for obtaining (and providing to Landlord on
request) the appropriate certificates or other evidence of insurance; provided,
however, each subcontractor need not carry in excess of One Million Dollars
($1,000,000.00) liability insurance.  The requirements for the foregoing
insurance shall not derogate from the provisions for





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   40
indemnification of Landlord by Tenant under this Lease.  All insurance, except
workers' compensation, maintained by Tenant's general contractor and its
subcontractors, shall preclude subrogation claims by the insurer against anyone
insured thereunder.

                 Tenant's general contractor shall maintain all of the
foregoing insurance coverage in force until the work under this Work Letter and
Construction Agreement is fully completed and accepted except as to products
and completed operations liability coverage with amendments specified in 7.4(i)
above, which shall be maintained in force until such time as an action on
account of any matter covered by such insurance is barred by any applicable
statute of limitations.  This insurance obligation shall survive the expiration
or termination of this Lease.

                 If Tenant fails to secure and maintain the required insurance
from Tenant's general contractor, Landlord shall have the right (but without
any obligation to do so) to secure same in the name and for the account of
Tenant's general contractor, in which event Tenant shall pay the cost thereof,
together with a twenty percent (20%) servicing fee, as Additional Rent and
shall furnish upon demand all information that may be required in connection
therewith.

         8.      MISCELLANEOUS.

         8.1     Landlord may impose such rules and regulations regarding the
construction of the Tenant Improvements and the conduct of Tenant's general
contractor and subcontractors as Landlord may reasonably elect from time to
time.  If Landlord or its agents discover any work which is either not in
substantial conformity with the Plans or not in compliance with any laws or
regulations, Landlord may without liability to Tenant require Tenant to stop
the work and replace all defective or non-conforming work.

         8.2     Any default of Tenant in this Work Letter and Construction
Agreement shall constitute a default of Tenant under the Lease, and Landlord's
remedies shall be as set forth therein.  All provisions of the Lease are fully
incorporated in this Exhibit "B" as though set forth herein at length.

         8.3     Tenant shall designate one (1) construction representative
authorized to act for Tenant upon whom Landlord can rely, and who shall consult
with Landlord and Landlord's contractors, employees and agents in connection
with the construction of the Tenant Improvements.

         8.4     Tenant shall indemnify, defend, protect and hold the
Indemnified Parties harmless from all Claims (as defined in the Lease) which
arise in any way, directly or indirectly, from or in connection with the design
or construction of the Tenant Improvements, including without limitation
arising from the work of Tenant's architect, engineer, general contractor,
subcontractors, suppliers, laborers, employees or agents.

         8.5     Tenant hereby agrees to cause its general contractor to
construct a demising wall ("Demising Wall") dividing the Premises from the
remaining space within the Building, such Demising Wall to be in accordance
with plans and specifications approved by Landlord.  In consideration of
Tenant's construction of the Demising Wall as described above, Landlord agrees
to reimburse Tenant, within thirty (30) days following Landlord's receipt of
paid invoices therefor, for all costs incurred by Tenant in connection with the
construction of the Demising Wall, but only to the extent such costs exceed
$3,223.00, and provided further that in no event shall Landlord's reimbursement
obligation hereunder exceed the sum of $9,669.00.





                                      -5-
   41
                                  EXHIBIT "C"

                          ADDITIONAL LEASE PROVISIONS


         A.      Option to Extend Term.  Landlord grants to Tenant one (1)
option to extend the Term of this Lease for a sixty (60) month period (the
"Option") commencing upon the expiration of the initial Term (or upon the
expiration of the preceding Option if any), upon each of the following
conditions and terms:

                 1.       Tenant shall give to Landlord, and Landlord shall
actually receive, on a date which is at least six (6) months and not more than
twelve (12) months prior to the then scheduled expiration date of the Term, a
written notice of Tenant's exercise of such Option (the "Option Notice"), time
being of the essence.  If the Option Notice is not timely so given and
received, such Option shall automatically expire.

                 2.       Tenant shall have no right to exercise an Option,
notwithstanding any provision hereof to the contrary, (a) during the time
commencing from the date Landlord gives to Tenant a notice of default pursuant
to Paragraph 18.10 of this Lease and continuing until the noncompliance alleged
in said notice of default is cured, or (b) during the period of time commencing
on the day after a monetary obligation to Landlord is due from Tenant and
unpaid (without any necessity for notice thereof to Tenant) and continuing
until the obligation is paid, or (c) if Landlord has given to Tenant three or
more notices of default under Paragraph 18.10 of this Lease, whether or not the
defaults are cured, or Tenant has been late on three or more occasions in the
payment of a monetary obligation to Landlord (without any necessity for notice
thereof to Tenant), during the 12 month period of time immediately prior to the
time that Tenant attempts to exercise the Option, or (d) if Tenant has
committed any noncurable breach, or is otherwise in default of any of the
terms, covenants or conditions of this Lease.

                 3.       The period of time within which the Option may be
exercised shall not be extended or enlarged by reason of Tenant's inability to
exercise an Option because of the provisions of Paragraph A.2 above.

                 4.       All Option rights of Tenant under this Paragraph A.
shall terminate and be of no further force or effect, notwithstanding Tenant's
due and timely exercise of the Option, if, after such exercise and during the
initial Term of this Lease (as and if previously extended), (a) Tenant fails to
pay to Landlord a monetary obligation of Tenant for a period of ten (10) days
after such obligation becomes due (without any necessity of Landlord to give
notice thereof to Tenant), or (b) Tenant fails to commence to cure a default
specified in Paragraph 18.10 of this Lease within ten (10) days after the date
that Landlord gives notice to Tenant of such default and/or Tenant fails
thereafter to diligently prosecute said cure to completion within thirty (30)
days after the date of such notice, or (c) Landlord gives to Tenant one (1) or
more notices of default under Paragraph 18.10 of this Lease, or Tenant is late
on one (1) or more occasions in the payment of a monetary obligation to
Landlord (without any necessity of notice thereof to Tenant), whether or not
the defaults are cured, or (d) Tenant has committed any incurable breach, or is
otherwise in default of any of the terms, covenants and conditions of this
Lease.

                 5.       The Option granted to Tenant in this Lease is
personal to the original Tenant and may be exercised only by the original
Tenant while occupying the Premises who does so without the intent of
thereafter assigning this Lease or subletting the Premises or any portion
thereof, and may not be exercised or be assigned, voluntarily or involuntarily,
by or to any person or entity other than Tenant.  The Option herein granted to
Tenant is not assignable separate and apart from this Lease, nor may the





                                      -1-
   42
Option be separated from this Lease in any manner, either by reservation or
otherwise.

                6.      All of the terms and conditions of this Lease except 
where specifically modified by this Paragraph A shall apply during the extended
Term (the "Option Period").  Tenant hereby acknowledges and agrees that
Paragraph 2.8 of the Lease (Base Rent Credit) does not apply with respect to
the Option Period, and Tenant shall accept the Premises in its "as-is",
"where-is" condition without any representations or warranties whatsoever from
Landlord during the Option period.

                7.      The monthly Base Rent payable during the Option period 
shall be as follows:




                   Month of
                 Option Period             Base Rent
                 -------------             ---------
                               
                 1-12             $32,240.33 per month
                 13-24            $33,529.94 per month
                 25-36            $34,871.14 per month
                 37-48            $36,265.99 per month
                 49-60            $37,716.63 per month





                                      -2-