<PAGE>
 
                                 PARKWAY POINT



                          COMMERCIAL LEASE AGREEMENT

                       COMMERCE SQUARE ASSOCIATES L.L.C.
                     a Colorado limited liability company
                             "LANDLORD or LESSOR"

                                      AND

                             HATHAWAY CORPORATION,
                            a Colorado corporation
                              "TENANT or LESSEE"


                            Date:  October 24, 1996
                         (For reference purposes only)



                                       1
<PAGE>
 
                          COMMERCIAL LEASE AGREEMENT

                                   ARTICLE 1
                                   ---------
                               BASIC LEASE TERMS
                               -----------------

     1.01   Parties.  This lease agreement ("Lease") is entered into by and
between the following Lessor and Lessee:
                COMMERCE SQUARE ASSOCIATES L.L.C.  ("Landlord or Lessor")
                a Colorado limited liability company
                HATHAWAY CORPORATION,  ("Tenant or Lessee")
                a Colorado corporation
 
     1.02     Leased Premises. In consideration of the rents, terms, provisions
and covenants of this Lease, Lessor hereby leases, lets and demises to Lessee
the following described premises ("leased premises" or "Premises"):

                approximately 13,713  square feet
                8228 East Park Meadows Drive
                Littleton, Colorado  80124

     1.03     Term. Subject to and upon the conditions set forth herein, the
term of this Lease shall commence on and shall terminate sixty (60) months
thereafter on October 31, 2001.

    1.04      Base Rent. Lessee shall pay to Lessor Total Base Rent of Four
Hundred Fifty-Two Thousand Nine Hundred Forty and 60/100 Dollars ($452,940.60)
payable as follows:

<TABLE> 
<CAPTION> 
===============================================================================================
                                                  BASE RENTAL      MONTHLY        TOTAL BASE
                                                  RATE/RSF/YR     BASE RENT        RENT FOR
  PERIOD                       DATES                  NNN            NNN          PERIOD NNN
-----------------------------------------------------------------------------------------------
  <S>                   <C>                       <C>             <C>            <C>     
  12 months             11/1/1996-10/31/1997         $6.01        $6,867.93      $ 82,415.16
                                                                            
-----------------------------------------------------------------------------------------------
  12 months             11/1/1997-10/31/1998         $6.01        $6,867.93      $ 82,415.16
                                                                            
-----------------------------------------------------------------------------------------------
  12 months             11/1/1998-10/31/1999         $6.01        $6,867.93      $ 82,415.16
                                                                            
-----------------------------------------------------------------------------------------------
  12 months             11/1/1999-10/31/2000         $7.50        $8,570.63      $102,847.56

-----------------------------------------------------------------------------------------------
  12 months             11/1/2000-10/31/2001         $7.50        $8,570.63      $102,847.56
                       
===============================================================================================
</TABLE> 
 
Security Deposit Zero and 00/100 Dollars ($0.00).
 
     1.05    Addresses.
 
     Lessor's Address:                        Lessee's Address:
     Integrated Property Management, Inc.     Hathaway Corporation
     455 Sherman Street, Suite 140            8228 East Park Meadows Drive
     Denver, Colorado 80203                   Littleton, Colorado 80124

     1.06    Permitted Use.  General office and Research and Development use,
including service and repair of electronic equipment.


                                       2
<PAGE>
 
                                   ARTICLE 2
                                     RENT
                                     ----

     2.01   Base Rent. Lessee agrees to pay monthly as base rent during the term
of this Lease the sum of money set forth in section 1.04 of this Lease, which
amount shall be payable to Lessor at the address shown above. One monthly
installment of rent shall be due and payable on the date of execution of this
Lease by Lessee for the first month's rent and a like monthly installment shall
be due and payable on or before the first day of each calendar month succeeding
the commencement date or completion date during the term of this Lease;
provided, if the commencement date or the completion date should be a date other
than the first day of a calendar month, the monthly rental set forth above shall
be prorated to the end of the calendar month, and all succeeding installments of
rent shall be payable on or before the first day of each succeeding calendar
month during the term of this Lease. Lessee shall pay, as additional rent, all
other sums due under this Lease.

     2.02   Operating Expenses. Lessee shall also pay as additional rent
Lessee's pro rata share of the operating expenses of Lessor for the building
and/or project of which the leased premises are a part, except that Lessee's pro
rata share for Controllable Expenses shall be limited to an increase of no more
than six percent (6%) from the previous calendar year. Controllable Expenses
shall mean those expenses for which the Lessor contracts for services at a
negotiated price or rate for services (including professional property
management fees). Non-Controllable Expenses shall include all other expenses.
Lessor may invoice Lessee monthly for Lessee's pro rata share of the estimated
operating expenses for each calendar year, which amount shall be adjusted each
year based upon anticipated operating expenses. Within nine (9) months following
the close of each calendar year, Lessor shall provide Lessee an accounting
showing in reasonable detail all computations of additional rent due under this
section. In the event the accounting shows that the total of the monthly
payments made by Lessee exceeds the amount of additional rent due by Lessee
under this section, the accounting shall be accompanied by a refund. In the
event the accounting shows that the total of the monthly payments made by Lessee
is less than the amount of additional rent due by Lessee under this section, the
accounting shall be accompanied by an invoice for the additional rent.
Notwithstanding any other provision in this Lease, during the year in which this
Lease terminates, Lessor, prior to the termination date, shall have the option
to invoice Lessee for Lessee's pro rata share of operating expenses based upon
the previous year's operating expenses. If this Lease shall terminate on a day
other than the last day of calendar year, the amount of any additional rent
payable by Lessee applicable to the year in which the termination shall occur
shall be prorated on the ratio that the number of days from the commencement of
the calendar year to and including such termination date bears to 365. Lessee
shall have the right, at its own expense and within a reasonable time, to audit
Lessor's books relevant to the additional rent payable under this section.
Lessee agrees to pay any additional rent due under this section within ten days
following receipt of the invoice or accounting showing additional rent due. The
current estimate of Lessee's share of operating expenses is Two and 60/100
Dollars ($2.60) per square foot of the leased premises which shall be paid in
addition to and along with base rent. Lessee's prorated share of the projects
operating expenses shall be 15.20%.

     2.03    Definition of Operating Expenses. The term "operating expenses"
includes all expenses incurred by Lessor with respect to the maintenance and
operation of the building of which the leased premises are a part, including,
but not limited to, the following: maintenance, repair and replacement costs;
security; management fees, wages and benefits payable to employees of Lessor
whose duties are directly connected with the operation and maintenance of the
building; all services, utilities, supplies, repairs, replacements or other
expenses of maintaining and operating the common parking and plaza areas; the
cost, including interest, amortized over its useful life, or the costs


                                       3
<PAGE>
 
(amortized over their useful life) of capital improvements and structural
repairs and replacements made in or to the building (including finance costs) in
order to conform to any applicable laws, ordinances, rules, regulations, or
orders of any governmental or quasi-governmental authority having jurisdiction
over the building; the cost, including interest, amortized over its useful life,
of installation of any device or other equipment which improves the operating
efficiency of any system within the leased premises and thereby reduces
operating expenses; all other expenses which would generally be regarded as
operating and maintenance expenses which would reasonably be amortized over a
period not to exceed five (5) years; all real property taxes and installments of
special assessments, including dues and assessments by means of deed
restrictions and/or owners' associations which accrue against the building of
which the leased premises are a part during the term of this Lease; and all
insurance premiums Lessor is required to pay or deems necessary to pay,
including public liability insurance, with respect to the building. The term
operating expenses does not include the following: repairs, restoration or other
work occasioned by fire, wind, the elements or other casualty; income and
franchise taxes of Lessor; expenses incurred in leasing to or procuring of
Lessees, leasing commissions, advertising expenses and expenses for the
renovating of space for new Lessees; interest or principal payments on any
mortgage or other indebtedness of Lessor; compensation paid to any employee of
Lessor above the grade of property manager; and depreciation allowance or
expense; or operating expenses which are the responsibility of Lessee.

     2.04    Late Payment Charge.  Other remedies for nonpayment of rent
notwithstanding, if the monthly rental payment is not received by Lessor on or
before the fifth (5th) day of the month for which the rent is due, or if any
other payment due Lessor by Lessee is not received by Lessor on or before the
fifth (5th) day of the month next following the month in which Lessee was
invoiced, a late payment charge of five percent (5%) of such past due amount
shall become due and payable in addition to such amounts owed under this Lease.

     2.05    Interest Due.  If any amount due from Lessee to Lessor hereunder
whether it be rental or other charges, is not paid within five (5) days of when
due, Lessee shall pay Lessor an amount equal to eighteen percent (18%) per annum
of the total amount due Lessor, from the original due date until paid.  Interest
charges shall be in addition to, and not in substitution of, late charges
imposed.

     2.06    Increase in Insurance Premiums. If any increase in any insurance
premiums paid by Lessor for the building is caused by Lessee's use of the leased
premises in a manner other than as set forth in section 1.06, or if Lessee
vacates the leased premises and causes an increase in such premiums, then Lessee
shall pay as additional rent the amount of such increase to Lessor.

     2.07    Security Deposit. The security deposit set forth above shall be
held by Lessor for the performance of Lessee's covenants and obligations under
this Lease, it being expressly understood that the deposit shall not be
considered an advance payment of rental or a measure of Lessor's damage in case
of default by Lessee. Upon the occurrence of any event of default by Lessee or
breach by Lessee of Lessee's covenants under this Lease, Lessor may, from time
to time, without prejudice to any other remedy, use the security deposit to the
extent necessary to make good any arrears of rent, or to repair any damage or
injury, or pay any expense or liability incurred by Lessor as a result of the
event of default or breach of covenant, and any remaining balance of the
security deposit is so used or applied, Lessee shall upon ten (10) days written
notice from Lessor, deposit with Lessor by cash or cashier's check an amount
sufficient to restore the security deposit to its original amount.

     2.08   Holding Over.  In the event that Lessee does not vacate the leased
premises upon the expiration or termination of this Lease, Lessee shall be a
tenant-at-will for the holdover period and all 


                                       4
<PAGE>
 
of the terms and provisions of this Lease shall be applicable during that
period, except that Lessee shall pay Lessor as base rental for the period of
such holdover an amount equal to one and one-half (1 1/2) times the base rent
which would have been payable by Lessee had the holdover period been a part of
the original term of this Lease. Lessee agrees to vacate and deliver the leased
premises to Lessor upon Lessee's receipt of notice from Lessor to vacate. The
rental payable during the holdover period shall be payable to Lessor on demand.
No holding over by Lessee, whether with or without the consent of Lessor, shall
operate to extend the term of this Lease.


                                   ARTICLE 3
                               OCCUPANCY AND USE
                               -----------------

     3.01    Use. Lessee warrants and represents to Lessor that the leased
premises shall be used and occupied only for the purpose as set forth in section
1.06. Lessee shall occupy the leased premises, conduct its business and control
its agents, employees, invitees and visitors in such a manner as is lawful,
reputable and will not create a nuisance. Lessee shall not permit any operation
which emits any odor or matter which intrudes into other portions of the
building, use any apparatus or machine which makes undue noise or causes
vibration in any portion of the building or otherwise interfere with, annoy or
disturb any other Lessee in its normal business operations or Lessor in its
management of the building. Lessee shall neither permit any waste on the leased
premises nor allow the leased premises to be used in any way which would, in the
opinion of Lessor, be extra hazardous on account of fire or which would in any
way increase or render void the fire insurance on the building. Lessee warrants
to Lessor that the insurance questionnaire (filled out by Lessee, signed and
presented to Lessor prior to the executing of this Lease, accurately reflects
Lessee's original intended use of the leased premises. The insurance
questionnaire is made a part of this Lease by reference as though full copied
herein. If at any time during the term of this Lease the State Board of
Insurance or other insurance authority disallows any of Lessor's sprinkler
credits or imposes an additional penalty or surcharge in Lessor's insurance
premiums because of Lessee's original or subsequent placement of use of storage
racks or bins, method of storage or nature of Lessee's inventory or any other
act of Lessee, Lessee agrees to pay as additional rent the increase (between
fire walls) in Lessor's insurance premiums.

     3.02    Signs. No sign of any type or description shall be erected, placed
or painted in or about the leased premises or project except those signs
submitted to Lessor in writing and approved by Lessor in writing, and which
signs are in conformance with Lessor's sign criteria established for the
Project.

     3.03    Compliance with Laws, Rules, and Regulations. Lessee shall not use
the Premises or permit anything to be done in or about the Premises which will
in any way conflict with any law, statute, ordinance or governmental rule or
regulation now in force or which may hereafter be enacted or promulgated. Lessee
shall at its sole cost and expense promptly comply with all laws, statutes,
ordinances or governmental rules, regulations and requirements now in force or
which may hereafter be in force and with the reasonable requirements of any
insurer, underwriter or other similar entity now or hereafter relating to or
affecting the condition, use or occupancy of the Premises, excluding structural
changes not related to or affected by Lessee's improvements or acts. Lessee
shall be solely responsible for compliance with the provisions of the Americans
with Disabilities Act (the "ADA") as it applies to Lessee's business and the
Premises. Lessor shall be solely responsible for compliance with the provisions
of the ADA as it applies to the Building. Lessor makes no warranty express or
implied that Lessee's intended use of the Premises is suitable or allowable
under any applicable governmental code, statute or regulation. Lessee, at
Lessee's sole cost and expense, shall comply with all laws, ordinances, 



                                       5
<PAGE>
 
orders, rules and regulations of state, federal, municipal or their agencies or
bodies having jurisdiction over use, condition and occupancy of the leased
premises.

     Lessee will comply with the rules and regulations of the building adopted
by Lessor which are set forth on a schedule attached to this Lease.  Lessor
shall have the right at all times to change and amend the rules and regulations
in any reasonable manner as may be deemed advisable for the safety, care,
cleanliness, preservation of good order and operation or use of the building or
the leased premises.  All changes and amendments to the rules and regulations of
the building will be sent by Lessor to Lessee in writing and shall thereafter be
carried out and observed by Lessee.

     3.04    Warranty of Possession.  Lessor warrants that it has the right and
authority to execute this Lease, and Lessee, upon payment of the required rents
and subject to the terms, conditions, covenants and agreements contained in this
Lease, shall have possession of the leased premises during the full term of this
Lease as well as any extension or renewal thereof.  Lessor shall not be
responsible for the acts or omissions of any other Lessee or third party that
may interfere with Lessee's use and enjoyment of the leased premises.

     3.05    Inspection.  Lessor or its authorized agents shall at any and all
reasonable times have the right to enter the lease premises to inspect the same,
to supply janitorial service or any other service to be provided by Lessor, to
show the leased premises to prospective purchasers or Lessees, and to alter,
improve or repair the leased premises or any other portion of the building.
Lessee hereby waives any claim for damages for injury or inconvenience to or
interference with Lessee's business, any loss of occupancy or use of the leased
premises, and any other loss occasioned thereby.  Lessor shall at all times have
and retain a key with which to unlock all of the doors in, upon and about the
leased premises.  Lessee shall not change Lessor's lock system or in any other
manner prohibit Lessor from entering the leased premises.  Lessor shall have the
right to use any and all means which Lessor may deem proper to open any door in
an emergency without liability therefore.


                                   ARTICLE 4
                             UTILITIES AND SERVICE
                             ---------------------

     4.01    Building Services.  Lessor shall provide the normal utility service
connections to the building.  Lessee shall pay the cost of all utility services,
including, but not limited to, initial connection charges, all charges for gas,
electricity, water, sanitary and storm sewer service, and for all electric
lights.  However, in a multi-occupancy building, Lessor may provide water to the
leased premises, in which case Lessee agrees to pay to Lessor its pro rata share
of the cost of such water.  Lessee shall be responsible for the installation and
maintenance of any dilution tanks, holding tanks, settling tanks, sewer sampling
devices, sand traps, grease traps or similar devices as may be required by any
governmental subdivision for Lessee's use of the sanitary sewer system.  If the
leased premises are in a multi-occupancy building, Lessee shall pay all
surcharges levied due to Lessee's use or sanitary or waste removal services
insofar as such surcharges affect Lessor or other Lessees in the building.
Lessor shall not be required to pay for any utility services, supplies or up
keep in connection with the leased premises or building.

     4.02    Theft or Burglary. Lessor shall not be liable to Lessee for losses
to Lessee's property or personal injury caused by criminal acts or entry by
unauthorized persons into the leased premises or the building.


                                       6
<PAGE>
 
                                   ARTICLE 5
                            REPAIRS AND MAINTENANCE
                            -----------------------

     5.01    Lessor Repairs. Lessor shall not be required to make any
improvements, replacements or repairs of any kind or character to the leased
premises or the project during the term of this Lease except as are set forth in
this section. Lessor shall maintain only the roof, foundation, parking and
common areas, and the structural soundness of the exterior walls (excluding
windows, windowglass, plate glass and doors). Lessor's costs of maintaining the
items set forth in this section are subject to the additional rent provisions in
section 2.02. Lessor shall not be liable to Lessee, except as expressly provided
in this Lease, for any damage or inconvenience, and Lessee shall not be entitled
to any abatement or reduction of rent by reason of any repairs, alterations or
additions made by Lessor under this Lease.

     5.02    Lessee Repairs. Lessee shall, at its sole cost and expense,
maintain, repair and replace all other parts of the leased premises in good
repair and condition, including, but not limited to, heating, ventilating and
air conditioning systems, fire sprinkler system, dock bumpers, pest control and
extermination and trash pick-up and removal. Lessee shall repair and pay for any
damage caused by any act or omission of Lessee or Lessee's agents, employees,
invitees, licensees or visitors. If Lessee fails to make the repairs of
replacements promptly as required herein, Lessor may, at its option, make the
repairs and replacements and the cost of such repairs and replacements shall be
charged to Lessee as additional rent and shall become due and payable to Lessee
within ten (10) days from receipt of Lessor's invoice. Costs incurred under this
section are the total responsibility of Lessee and do not constitute operating
expenses under section 2.02.

     5.03    Request for Repairs. All requests for repairs or maintenance that
are the responsibility of Lessor pursuant to any provision of this Lease must be
made in writing to Lessor at the address in section 1.05.

     5.04    Lessee Damages. Lessee shall not allow any damage to be committed
on any portion of the leased premises or building, and at the termination of
this Lease, by lapse of time or otherwise, Lessee shall deliver the leased
premises to Lessor in as good condition as existed at the commencement date of
this Lease, ordinary wear and tear excepted. The cost and expense of any repairs
necessary to restore the condition of the leased premises shall be borne by
Lessee.

     5.05    Maintenance Contract. Lessee shall, at its sole cost and expense,
during the term of this Lease maintain a regularly scheduled preventative
maintenance/service contract with a maintenance contractor for the servicing of
all heating and air conditioning systems and equipment within the leased
premises. The maintenance contractor and contract must be approved by Lessor and
must include quarterly servicing, replacement of filters, replacement or
adjustment of drive belts, periodic lubrication and oil change and any other
services suggested by the equipment manufacturer.


                                       7
<PAGE>
 
                                   ARTICLE 6
                          ALTERATIONS AND IMPROVEMENTS
                          ----------------------------

     6.01    Lessor Improvements. If construction to the leased premises is to
be performed by Lessor prior to or during Lessee's occupancy, Lessor will
complete the construction of the improvements to the leased premises, in
accordance with plans and specification agreed to by Lessor and Lessee, which
plans and specifications are made a part of this Lease by reference. Lessee
shall execute a copy of the plans and specifications and change orders, if
applicable, setting forth the amount of any costs to be borne by Lessee with
seven (7) days of receipt of the plans and specifications. In the event Lessee
fails to execute the plans and specifications and change orders within the seven
(7) day period, Lessor may at its sole option, declare this Lease canceled or
notify Lessee that the base rent shall commence on the completion date even
thought the improvements to be constructed by Lessor may not be complete. Any
changes or modifications to the approved plans and specifications shall be made
and accepted by written change order or agreement signed by Lessor and Lessee
and shall constitute an amendment to this Lease.

     6.02    Lessee Improvements. Lessee shall not make or allow to be made any
alterations or physical additions in or to the leased premises without first
obtaining the written consent of Lessor, which consent shall not unreasonably be
withheld except for alterations or additions that affect the structural,
electrical or mechanical systems, the consent of which may in the sole and
absolute discretion of Lessor be denied. Any alterations, physical additions or
improvements to the leased premises made by Lessee shall at once become the
property of Lessor and shall be surrendered to Lessor upon the termination of
this Lease; provided, however, Lessor at its option, may require Lessee to
remove any physical additions and/or repair any alterations in order to restore
the leased premises to the condition existing at the time Lessee took
possession, all costs of removal and/or alterations to be borne by Lessee. This
clause shall not apply to moveable equipment or furniture owned by Lessee, which
may be removed by Lessee at the end of the term of this Lease if Lessee is not
then in default and if such equipment and furniture are not then subject to any
other rights, liens and interest of Lessor.

     6.03    Mechanics Lien. Lessee will not permit any mechanic's or
materialman's lien(s) or other lien to be placed upon the leased premises or the
building in connection with work performed by Lessee or at Lessee's direction,
and nothing in this Lease shall be deemed to construed in any way as
constituting the consent or request of Lessor, express or implied, by inference
or otherwise, to any person for the performance of any labor or the furnishing
of any materials to the leased premises, or any part thereof, nor as giving
Lessee any right, power, or authority to contract for or permit the rendering of
any services of the furnishing of any materials that would give rise to any
mechanic's, materialman's or other lien against the leased premises. In the
event any such lien is attached to the leased premises, then, in addition to any
other right or remedy of Lessor, Lessor may, but shall not be obligated to,
obtain the release of or otherwise discharge the same. Any amount paid by Lessor
for any of the aforesaid purposes shall be paid by Lessee to Lessor on demand as
additional rent.


                                       8
<PAGE>
 
                                   ARTICLE 7
                             CASUALTY AND INSURANCE
                             ----------------------

     7.01    Substantial Destruction.  If the leased premises should be totally
destroyed by fire or other casualty, or if the leased premises should be damaged
so that rebuilding cannot reasonably be completed within ninety (90) working
days after the date of written notification by Lessee to Lessor of the
destruction, this Lease shall terminate and the rent shall be abated for the
unexpired portion of the Lease, effective as of the date of the written
notification.  Notwithstanding the foregoing there shall be not abatement of
rent in the event Tenant is responsible in whole or in part for the casualty or
destruction.

     7.02    Partial Destruction.  If the leased premises should be partially
damaged by fire or other casualty, and rebuilding or repairs can reasonably be
completed with ninety (90) working days from the date of written notification by
Lessee to Lessor of the destruction, this Lease shall not terminate, and Lessor
shall at its sole risk and expense proceed with reasonable diligence to rebuild
or repair the building or other improvements to substantially the same condition
in which they existed prior to the damage.  If the leased premises are to be
rebuilt or repaired and are untenantable in whole or in part following the
damage, and the damage or destruction was not caused or contribute to by act or
negligence of Lessee, its agents, employees, invitees, or those for whom Lessee
is responsible, the rent payable under this Lease during the period for which
the leased premises are untenantable shall be adjusted to such an extent as may
be fair and reasonable under the circumstances.  In the event that Lessor fails
to complete the necessary repairs or rebuilding  within ninety (90) working days
from the date of written notice of termination to Lessor whereupon all rights
and obligations under this Lease shall cease to exist.
 
     7.03    Waiver of Subrogation.  Anything in this Lease to the contrary
notwithstanding, Lessor and Lessee hereby waive and release each other of and
from any and all right of recovery, claim, action or cause of action, against
each other, their agents, officers and employees, for any loss or damage that
may occur to the leased premises, improvements to the building of which the
leased premises are a part, or personal property within the building, by reason
of fire or the elements, regardless of cause or origin, including negligence of
Lessor or Lessee and their agents, officers and employees.  Lessor and Lessee
agree immediately to give their respective insurance companies which have issued
policies of special covered causes of loss insurance of direct physical loss,
written notice of the terms of the mutual waivers contained in this section, and
to have the insurance policies property endorsed, if necessary, to prevent the
invalidation of the insurance coverages by reason of the mutual waivers.

     7.04    Hold Harmless.   Lessor shall not be liable to Lessee's employees,
agents, invitees, licensees or visitors, or to any other person, for an injury
to any other person, for an injury to person or damage to property on or about
the leased premises caused by any act or omission of Lessee, its agents,
servants or employees, or of any other person entering upon the leased premises
under express or implied invitation by Lessee, or caused by the improvements
located on the leased premises becoming out of repair, the failure or cessation
of any service provided by Lessor  (including security service and devices), or
caused by leakage of gas, oil, water or steam or by electricity emanating from
the leased premises except to the extent that the failure or cessation of any
service, which the Landlord is obligated to provide hereunder, is caused by the
negligence or intentional misconduct of the Landlord.  Lessee agrees to
indemnify and hold harmless Lessor of and from any loss, attorney's fees,
expenses or claims arising out of any such damage or injury.


                                       9
<PAGE>
 
     Landlord, its agents and employees shall not be liable, and Tenant hereby
waives its rights, if any, to claim for any damage or loss as a result of any
failure of the Building to comply strictly with the ADA as it applies to the
Building.  Tenant hereby agrees to save, hold harmless and defend Landlord from
any claims, suits or liabilities made against the Landlord by any of Tenant's
existing or prospective clients, employees, agents, servants or invitees as a
result of or in connection with any non-compliance of the Premises with the ADA.
In the event of any failure of the Building to comply with the ADA, if such
alleged defect was not apparent at the date of execution hereof, and if such
failure substantially interferes with the operation of Tenant's business in the
Premises, Tenant's sole remedy shall be for termination of this Lease, provided
that, Tenant shall have no claim for termination of this Lease based on the non-
compliance with the ADA by the Building unless Tenant (i) promptly gives notice
of any such non-compliance and allows Landlord a reasonable time to correct any
such non-compliance, and (ii) if such compliance is not effected within a
reasonable time, Tenant gives no less than ninety (90) days prior written notice
of the termination date, Tenant actually vacates the Premises on or before such
termination date, and Tenant is in compliance with its obligations under this
Lease on the date the notice is given and on the termination date.

     In case any claim, demand, action or proceeding is made or brought against
Landlord, its agents or employees, as a result of Tenant's default or alleged
default of any obligation on Tenant's part to be performed under the terms of
this Lease, or arising from any act, omission or negligence of Tenant, its
agents or employees, or which gives rise to Tenant's obligation to indemnify
Landlord, Tenant shall be responsible for all costs and expenses, including but
not limited to reasonable attorneys' fees incurred in defending or prosecution
of the same, as applicable.

     7.05    Tenant's Insurance.  Tenant shall, at its own cost, at all times
during the term of this Lease and any extensions hereof, procure and maintain
special covered causes of loss insurance on Tenant's Property and the contents
of the Premises in an amount equal to full replacement cost thereof Tenant shall
also maintain workers' compensation and employers' liability insurance in the
minimum statutory amount Tenant shall also maintain commercial general liability
insurance on an occurrence basis, including coverage for bodily injury, property
damage, personal injury products and completed operations, liability assumed
under an insured contract host liquor legal liability and cross liability with
the following limits of liability:  One Million Dollars ($1,000,000.00) combined
single limit for each occurrence of bodily injury and property damage and
personal injury; Two Million Dollars ($2,000,000.00) aggregate for bodily injury
and property damage for products and completed operations.  Tenant shall
further, at its own cost, at all times during the term of this Lease and any
extensions hereof, procure and maintain insurance for automobile liability
including coverage for bodily injury and property damage for owned and hired
autos with the following limits of liability:  One Million Dollars
($1,000,000.00) combined single limit for each occurrence of bodily injury and
property damage.  Tenant shall also maintain business interruption insurance in
an amount sufficient to reimburse Tenant for direct and indirect loss of
earnings attributable to prevention of access to the Building or Premises as a
result of such perils, and such other forms and amounts of insurance as Landlord
or its mortgagee may reasonably require from time to time.  All such insurance
shall be procured from a responsible insurance company or companies authorized
to do business in the State where the Premises are located, with general
policyholder's ratings of not less than "A-" and a financial rating of not less
than "VI" in the most current available Best's Insurance Reports, and shall be
otherwise reasonably satisfactory to Landlord.  All such policies except Workers
Compensation shall name Landlord and Landlord's property management agent as
additional insureds, and shall provide that the same may not be canceled except
upon thirty (30) days prior written notice to Landlord.  All insurance
maintained by Tenant shall be primary to any insurance provided by Landlord.
Tenant shall provide certificate(s) of such insurance to Landlord prior to
occupancy of the Premises and commence-


                                      10
<PAGE>
 
ment of the Lease term and at least thirty (30) days prior to the annual renewal
date thereof and upon request from time to time and such certificate(s) shall
disclose that such insurance names Landlord and Landlord's designated property
management agent as an additional insured, in addition to the other requirements
set forth herein. The limits of such insurance shall not, under any
circumstances, limit the liability of Tenant hereunder.

     Should Tenant fail to procure such insurance within the time period
hereinbefore specified, Landlord may, at its option, but Landlord shall have no
obligation to do so, procure such insurance and pay the premiums therefor and
Tenant agrees to reimburse Landlord for the cost thereof plus interest thereon
at the rate of eighteen percent (18%) per annum (but in no event in excess of
the maximum rate permitted under law), as Additional Rent on the first day of
the calendar month following the rendition of the bill or bills therefor and
Landlord shall have the same rights and remedies in enforcing the payment of
such additional rent as in the case of Tenant's failure to pay the rent herein
reserved.

     7.06    Landlord's Insurance.  Landlord agrees to carry and maintain the
following insurance during the term of this Lease and any extension hereof:
general public liability insurance against claims for personal injury, including
death and property damage in or about the Premises and the Building or the
Building Complex (excluding Tenant's Property), such insurance to be in an
amount not less than One Million Dollars ($1,000,000.00) combined single limit.
Landlord shall also carry fire and a casualty insurance covering the Building in
an amount not less than eighty percent (80%) of the replacement cost of same.
Such insurance may expressly exclude property paid for by tenants or paid for by
Landlord for which tenants have reimbursed Landlord located in, or constituting
a part of the Building or the Building Complex.  Such insurance shall afford
coverage for damages resulting from (a) fire, (b) perils covered by extended
coverage insurance, and (c) explosion of steam and pressure boilers and similar
apparatus located in the Building or the Building Complex.  Landlord may carry
such other additional insurance coverage as Landlord or Landlord's mortgagee
deems appropriate including coverage for loss of rents.  All such insurance
shall be procured from a responsible insurance company or companies authorized
to do business in the State where the Premises are located, with general
policyholder's ratings of not less than "A-" and a financial rating of not less
than "XI" in the most current available Best's Insurance Reports.


                                   ARTICLE 8
                                 CONDEMNATION
                                 ------------

8.0  Condemnation
     ------------

     8.01    Substantial Taking. If all or a substantial part of the leased
premises are taken for any public or quasi-public use under any governmental
law, ordinance or regulation, or by right of eminent domain or by purchase in
lieu thereof, and the taking would prevent or materially interfere with the use
of the leased premises for the purpose for which it is then being used, this
Lease shall terminate and the rent shall be abated during the unexpired portion
of this Lease effective on the date physical possession is taken by the
condemning authority. Lessee shall have no claim to the condemnation award or
proceeds in lieu thereof. Lessee shall have the right, in a separate legal
action, to make claim for its personal property so long as the award in no way
reduces the award to Lessor.

     8.02    Partial Taking.  If a portion of the leased premises shall be taken
for any public or quasi-public use under any governmental law, ordinance, or
regulation, or by right of eminent  domain or by purchase in lieu thereof, and
this Lease is not terminated as provided in Section 8.01 above, 


                                      11
<PAGE>
 
Lessor shall at Lessor's sole risk and expense, restore and reconstruct the
building and other improvements on the leased premises to the extent necessary
to make it reasonable tenantable. The rent payable under this Lease during this
unexpired portion of the term shall be adjusted to such an extent as may be fair
and reasonable under the circumstance. Lessee shall have no claim to the
condemnation award or proceeds in lieu thereof. Lessee shall have the right, in
a separate legal action, to make claim for its personal property so long as the
award in no way reduces the award to Lessor.


                                   ARTICLE 9
                            ASSIGNMENT OR SUBLEASE
                            ----------------------

9.0  Assignment or Sublease
     ----------------------

     9.01    Lessor Assignment. Lessor shall have the right to sell, transfer or
assign, in whole or in part, its rights and obligations under this Lease and in
the building. Any such sale, transfer or assignment shall operate to release
Lessor from any and all liabilities under this Lease arising after the date of
such sales, assignment or transfer.

     9.02    Lessee Assignment. Lessee shall not assign, in whole or in part,
this Lease, or allow it to be assigned, in whole or in part, by operation of law
or otherwise (excluding the transfer of a majority interest of stock, or merger
which shall be deemed an assignment but will not require the consent of Landlord
provided Tenant notifies Lessor, in writing, at least thirty (30) days in
advance of the date on which Lessee desires to make such assignment) or mortgage
or pledge the same, or sublet the leased premises, in whole or in part, without
the prior written consent of Lessor (which consent shall not be unreasonably
withheld or delayed), and in no event shall any such assignment or sublease ever
release Lessee or any guarantor from any obligation or liability hereunder. No
assignee or sublessee of the leased premises or any portion thereof may assign
or sublet the leased premises or any portion thereof.

     9.03    Condition of Agreement. If Lessee desires to assign or sublet all
or any part of the leased premises, it shall so notify Lessor at least thirty
(30) days in advance of the date on which Lessee desires to make such assignment
or sublease. Lessee shall provide Lessor with a copy of the proposed assignment
or sublease and such information as Lessor might request concerning the proposed
sublessee or assignee to allow Lessor to make informed judgments as to the
financial condition, reputation, operations and general desirability of the
proposed sublessee or assignee. Within fifteen (15) days after Lessor's receipt
of Lessee's proposed assignment or sublease and all required information
concerning the proposed sublessee or assigner, Lessor shall have the following
options: (1) cancel this Lease as to the leased premises or portion thereof
proposed to be assigned or sublet; (2) consent to the proposed assignment or
sublease, and, if the rent due and payable by any assignee or sublessee under an
such permitted assignment or sublease (or a combination of the rent payable
under such assignment of sublease plus any bonus or any other consideration or
any payment incident thereto) exceeds the rent payable under this Lease for such
space, Lessee shall pay to Lessor one-half ( 1/2) of such excess rent and other
excess consideration within ten (10) days following receipt thereof by Lessee;
or (3) refuse, in its reasonable judgment, to consent to the proposed assignment
or sublease, which refusal shall be deemed to have been exercised unless Lessor
give Lessee written notice providing otherwise. Upon the occurrence of an event
of default, if all or any part of the leased premises are then assigned or
sublet, Lessor in addition to any other remedies provided by this Lease or
provided by law, may, at its option, collect directly from the assignee or
sublessee all rents becoming due to Lessee by reason of the assignment or
sublease, and Lessor shall have a security interest in all properties on the
leased premises 


                                      12
<PAGE>
 
to secure payment of such sums. Any collection directly by Lessor from the
assignee or sublessee shall not be construed to constitute a novation or release
of Lessee or any guarantor from the further performance of its obligation under
this Lease.

     9.04    Subordination. Lessee accepts this Lease subject and subordinate to
any recorded mortgage or deed of trust lien presently existing or hereafter
created upon the building or project and to all existing recorded restrictions,
covenants, easements and agreements with respect to the building or project.
Lessor is hereby irrevocably vested with full power and authority to subordinate
Lessee's interest under this Lease to any first mortgage or deed of trust lien
hereafter placed on the leased premises, and Lessee agrees upon demand to
execute additional instruments subordinating this Lease as Lessor may require.
If the interests of Lessor under this Lease shall be transferred by reason of
foreclosure or other proceedings for enforcement of any first mortgage or deed
of trust lien on the leased premises, Lessee shall be bound to the transferee
(sometimes call the "Purchaser") at the option of the Purchaser, under the
terms, covenants and conditions of this Lease for the balance of the term
remaining, including any extensions or renewals, with the same force and effect
as if the Purchaser were Lessor under this Lease, and, if requested by the
Purchaser, Lessee agrees to attorn to the Purchaser, including the first
mortgagee under any such mortgage if it be the Purchaser, as its Lessor.

     9.05    Estoppel Certificates. Lessee agrees to furnish, from time to time,
within ten (10) days after receipt of a request from Lessor or Lessor's
mortgagee, a statement certifying, if applicable, the following: Lessee is in
possession of the leased premises; the leased premises are acceptable; the Lease
is in full force and effect, the Lease is unmodified; Lessee claims no present
charge, lien, or claim of offset against rent; the rent is paid for the current
month, but is not prepaid for more than one (1) month and will not be prepaid
for more than one (1) month in advance; there is no existing default by reason
of some act or omission by Lessor; and such other matters as may be reasonable
required by Lessor or Lessor's mortgagee. Lessee's failure to deliver such
statement, in addition to being a default under this Lease, shall be deemed to
establish conclusively that this Lease is in full force and effect except as
declared by Lessor, that Lessor is not in default of any of its obligations
under this Lease, and the Lessor has not received more than one month rent in
advance.


                                  ARTICLE 10
                                     LIENS
                                     -----


                                  ARTICLE 11
                             DEFAULT AND REMEDIES
                             --------------------

     11.01   Default by Lessee.  The following shall be deemed to be events of
default by Lessee under this Lease: (1) Lessee shall fail to pay when due any
installment of rent or any other payment required pursuant to this Lease; (2)
Lessee shall abandon any substantial portion of the leased premises; (3) Lessee
shall fail to comply with any term, provision or covenant of this Lease, other
than the payment of rent, and the failure is not cured within thirty (30) days
after written notice to Lessee; (4) Lessee shall file a petition or be adjudged
bankrupt or insolvent under any applicable federal or state bankruptcy or
insolvency law or admit that it cannot meet its financial obligations as they
become due; or a receiver or trustee shall be appointed for all or substantially
all of the assets of Lessee; or Lessee shall make a transfer in fraud of
creditors or shall make an assignment for the benefit of creditors; or (5)
Lessee shall do or permit to be done any act which results in a lien being filed
against the leased premises or the building and/or project of which the leased
premises are a part.


                                      13
<PAGE>
 
     11.02   Remedies for Lessee's Default.  Upon the occurrence of any event of
default set forth in this Lease, Lessor shall have the option to pursue any one
or more of the remedies set forth herein without any notice or demand.  (1)
Lessor may enter upon and take possession of the leased premises, by picking or
changing locks if necessary, and lock out, expel or remove Lessee and any other
person who may be occupying all or any part of the leased premises without being
liable for any claim for damages, and relet the leased premises on behalf of
Lessee and all or any part of the leased premises without being liable for any
claim for damages, and relet the leased premises on behalf of Lessee and receive
the rent directly by reason of the reletting.  Lessee agrees to pay Lessor on
demand any deficiency that may arise by reason of any reletting of the leased
premises; further, Lessee agrees to reimburse Lessor for any expenditures made
by it in order to relet the leased premises, including, but not limited to
remodeling and repair costs.   (2)  Lessor may enter upon the leased premises,
by picking or changing locks if necessary, and do whatever Lessee is obligated
to do under the terms of this Lease.  Lessee agrees to reimburse Lessor on
demand for any expenses which Lessor may incur in effecting compliance with
Lessee's obligations under this Lease; further, Lessee agrees that Lessor shall
not be liable for any damages resulting to Lessee from effecting compliance with
Lessee's obligations under this Lease caused by the negligence of Lessor or
otherwise.  (3) Lessor may terminate this Lease, in which event Lessee shall
immediately surrender the leased premises to Lessor, and if Lessee fails to
surrender the leased premises, Lessor may, without prejudice to any other remedy
which it may have for possession or arrearages in rent, enter upon and take
possession of the leased premises, by picking or changing locks if necessary,
and lock out, expel or remove Lessee and any other person who; may be occupying
all or any part of the leased premises without being liable for any claim for
damages.  Lessee agrees to pay on demand the amount of all loss and damage which
Lessor may suffer by reason of the termination of this Lease under this section,
whether through inability to relet the leased premises on satisfactory terms or
otherwise.  Notwithstanding any other remedy set forth in this Lease, in the
event Lessor has made rent concessions of any type or character, or waived any
base rent, and Lessee fails to take possession of the leased premises on the
commencement or completion date or otherwise defaults at any time during the
term of this Lease, the rent concessions, including any waived base rent, shall
be canceled and the amount of the base rent or other rent concessions shall be
due and payable immediately as if no rent concessions or waiver of any base rent
had ever been granted.  A rent  concession or waiver of the base rent shall not
relieve Lessee of any obligation to pay any other charge due and payable under
this Lease including without limitation any sum due under Section 2.02.
Notwithstanding anything contained in this Lease to the contrary, this Lease may
be terminated by Lessor only by mailing or delivering written notice of such
termination to Lessee, and no other act or omission of Lessor shall be construed
as a termination of this Lease.


                                  ARTICLE 12
                                  RELOCATION
                                  ----------

     12.01   Relocation Option.  In the event Lessor determines to utilize the
leased premises for other purposes during the term of this Lease, Lessee agrees
to relocate to other space in the building and/or project designed by Lessor,
provided such other space is of equal or larger size than the leased premises.

     12.02   Expense. Lessor shall pay all out of pocket expenses of any such
relocation, including the expenses of moving and reconstruction of all Lessee
furnished and Lessor furnished improvements if the event of such relocation,
this Lease shall continue in full force and effect without any change in the
terms or conditions of this Lease, but with the new location substituted for the
old location set forth in Section 1.02 of this Lease.


                                      14
<PAGE>
 
                                  ARTICLE 13
                                  DEFINITIONS
                                  -----------

     13.01  Abandon.  "Abandon" means the vacating of all or a substantial
portion of the leased premises by Lessee, when Lessee is in default of the
rental payments due under this Lease.

     13.02  Act of God or Force Majeure.  An "act of God" or "force majeure" is
defined for purposes of this Lease as strikes, lockouts, sitdowns, material or
labor restrictions by any governmental authority, unusual transportation delays,
riots, floods, washouts, explosions, earthquakes, fire, storms, weather
(including  wet grounds or inclement weather which prevents construction), acts
of the public enemy, wars, insurrections and any other cause not reasonably
within the control of Lessor and which by the exercise of due diligence Lessor
is unable, wholly or in part, to prevent or overcome.

     13.03  Building or Project.  "Building" or "Project" as used in this Lease
means the building and/or project described in Section 1.02, including the
leased premises and the land upon which the building or project is situated.

     13.04  Commencement Date.  "Commencement date"  shall be the date set forth
in Section 1.03.  The commencement date shall constitute the commencement of the
term of this Lease for all purposes, whether or not Lessee has actually taken
possession.

     13.05  Completion Date.  "Completion date" shall be the date on which the
improvements erected and to be erected upon the leased premises shall have been
completed in accordance with the plans and specifications described in Article
6.00. The completion date shall constitute the commencement of the term of this
Lease for all purposes, whether or not Lessee has actual taken possession.
Lessor shall use its best efforts to establish the completion date as the date
set forth in Section 1.03.  In the event that the improvements have not in fact
been completed as of that date, Lessee shall notify Lessor in writing of its
objections.  Lessor shall have a reasonable time after delivery of the notice in
which to take such corrective action as may be necessary and shall notify Lessee
in writing as soon as it deems such corrective action has been completed and the
improvements are ready for occupancy.  Upon completion of construction, Lessee
shall deliver the Lessor a letter accepting the leased premises as suitable for
the purposes for which they are let and the date of such letter shall constitute
the commencement of the term of this Lease.  Whether or not Lessee has executed
such letter of acceptance, taking possession of the leases premises by Lessee
shall be deemed to establish conclusively that the improvements have been
completed in accordance with the plans and specification, are suitable for the
purposes for which the leased premises are let, and that the leased premises are
in good and satisfactory condition as to the date possession was so taken by
Lessee, except for latent defaults, if any.

     13.06  Square Feet.  "Square feet" or "square foot" as used in this Lease
includes the area contained within the leased premises together with a common
area percentage factor of the leased premises proportionate to the total
building area.

                                  ARTICLE 14
                                 MISCELLANEOUS
                                 -------------

     14.01  Waiver.  Failure of Lessor to declare an event of default
immediately upon its occurrence, or delay in taking any action in connection
with an event of default, shall not constitute a 

                                       15
<PAGE>
 
waiver of the default, but Lessor shall have the right to declare the default at
any time and take such action as is lawful or authorized under this one or more
of the other remedies provided elsewhere in this Lease or provided by law, nor
shall pursuit of any remedy constitute forfeiture or waiver of any rent or
damages accruing to Lessor by reason of the violation of any of the terms,
provisions or covenants of this Lease. Failure by Lessor to enforce one or more
of the remedies provided upon an event of default shall not be deemed or
construed a waiver or the default or of any other violation or breach of any of
the terms, provisions and covenants in this Lease.

     14.02  Act of God.   Lessor shall not be required to perform any covenant
or obligation in this Lease, or be liable in damages to Lessee, so long as the
performance or non-performance of the covenant or obligation is delayed, caused
or prevented by an act of God, force majeure or by Lessee.

     14.03  Attorney's Fees. In the event of any arbitration, mediation or
litigation arising under this Lease, the prevailing party shall be entitled to
an award of its attorney's fees, costs and expenses.

     14.04  Successors.  This Lease shall be finding upon and inure to the
benefit of Lessor and Lessee and their respective heirs, personal
representative, successors and assigns.  It is hereby covenanted and agreed that
should Lessor's interest in the leased premises cease to exist for any reason
during the term of this Lease, then notwithstanding the happening of such event
this Lease nevertheless shall remain unimpaired and in full force and effect,
and Lessee hereunder agrees to attorn to the then owner of the leased premises.

     14.05  Rent Tax.  If applicable in the jurisdiction where the leased
premises are situated, Lessee shall pay and be liable for all rental, sales and
use taxes or other similar taxes, if any, levied or imposed by any city, state,
county or other governmental body having authority, such payments to be in
addition to all other payments required to be paid to Lessor by Lessee under the
terms of this Lease.  Any such payment shall be paid concurrently with the
payment of the rent, additional rent, operating expenses or other charges upon
which the tax is based as set forth above.

     14.06  Captions.  The captions appearing in this Lease are inserted only as
a matter of convenience and in no way define, limit construe or describe the
scope or intent of any section.

     14.07  Notice.  All rent and other payments required to be made by Lessee
shall be payable to Lessor at the address set forth in Section 1.05.  All
payments required to be made by Lessor to Lessee shall be payable to Lessee at
the address set forth in Section 1.05, or at any other address within the United
States as Lessee may specify from time to time by written notice.  Any notice or
document required or permitted to be delivered by the terms of this Lease shall
be deemed to be delivered (whether or not actually received) when deposited in
the United States Mail, postage prepaid, certified mail, return receipt
requested, addressed to the parties at the respective addresses set forth in
Section 1.05.

     14.08  Submission of Lease.  Submission of this Lease to Lessee for
signature does not constitute a reservation of space or an option to lease.
This Lease is not effective until execution by and delivery to both Lessor and
Lessee.

     14.09  Corporate Authority.  If Lessee executes this Lease as a
corporation, each of the persons executing this Lease on behalf of Lessee does
hereby personally represent and warrant that Lessee is a duly authorized and
existing corporation, that Lessee is qualified to do business in the state in
which the leased premises are located, that the corporation has full right and
authority to enter into 

                                       16
<PAGE>
 
this Lease, and that each person signing on behalf of the corporation is
authorized to do so. In the event any representation or warranty is false, all
persons who execute this Lease shall be liable, individually, as Lessee.

     14.10  Severability.  If any provision of this Lease or the application
thereof to any person or circumstance shall be invalid or unenforceable to any
extent, the remainder of this Lease and the application of such provisions to
other persons or circumstances shall not be affected thereby and shall be
enforced to the greatest extent permitted by law.

     14.11  Lessor's Liability.  If Lessor shall be in default under this Lease
and, if as a consequence of such default, Lessee shall recover a money judgment
against Lessor such judgment shall be satisfied only out of the right, title and
interest of Lessor in the building as the same may then be encumbered and
neither Lessor nor any person or entity comprising Lessor shall be liable for
any deficiency.  In no event shall Lessee have the right to levy execution
against any property of Lessor nor any person or entity comprising Lessor other
than its interest in the building as herein expressly provided.

     14.12  Indemnity.  Lessor agrees to indemnify and hold harmless Lessee from
and against any liability or claim, whether meritorious or not, arising with
respect to any broker whose claim arises by, through or on behalf of Lessor.
Lessee agrees to indemnify and hold harmless Lessor from and against any
liability or claim, whether meritorious or not, arising with respect to any
broker whose claim arises by, through or on behalf of Lessee.

     14.13  If the Building is, at the execution hereof or at any time during
the term hereof, subject to a mortgage or deed of trust, the Lessee agrees to
give the holder thereof (the "Note Holder") written notice of each and every
alleged default by Lessor under the Lease and agrees not to exercise any of
Lessee's remedies under the Lease unless the Note Holder fails to cure such
default within ten (10) days after the time for cure thereof allotted to the
Lessor under the forgoing subparagraph or within such longer period as may be
reasonably necessary if such default cannot be cured within such ten (10) days.
The Tenant understands that the Note Holder shall have the right but not the
obligation or duty to cure any such default by the Lessor.

     14.14  Hazardous Waste.  Lessee shall not bring or allow any of its agents,
employees, contractors or invitees to bring, onto or about the leased premises
or the Building, any Hazardous Materials.  For purposes of this Lease, the term
"Hazardous Materials" shall mean any one or more of the following:  (a) any
"hazardous waste" as defined by the Resource Conservation and Recovery Act of
1976 (42 U.S.C. Section 6901 et seq.), as amended from time to time, and
regulations promulgated thereunder; (b) any "hazardous substance" as defined by
the Comprehensive Environmental Response, Compensation and Liability Act of 1980
(42 U.S.C. Section 9601 et seq.) ("CERCLA"), as amended from time to time and
regulations promulgated thereunder; (c) asbestos; (d) polychlorinated biphenyls;
and (e) any other substance, in a quantity which, by any governmental rules,
statutes or regulations, requires special handling or notification of any
federal, state or local governmental entity in its collection, storage,
treatment or disposal.

     Each party herein shall immediately advise the other, in writing, in the
event such party becomes aware that there is located on or about the Leased
Premises or the Building, or that such party or other lessee or any other person
intends or may bring onto or about the leased premises or the Building any
Hazardous Materials without being in full compliance of all governmental rules
and regulations regarding Hazardous Materials.  Each party herein shall save,
hold harmless and indemnify 

                                       17
<PAGE>
 
the other from all claims, suits and liabilities which may be brought as a
result of the use, storage or transportation of any Hazardous Materials in or
about the leased premises or the Building by such party, its agents, contractors
or invitees.

                                  ARTICLE 15
                    AMENDMENT AND LIMITATION OF WARRANTIES
                    --------------------------------------

     15.01  Entire Agreement.  IT IS EXPRESSLY AGREED BY LESSEE, AS A MATERIAL
CONSIDERATION FOR THE EXECUTION OF THIS EASE, THAT THIS LEASE, WITH THE SPECIFIC
REFERENCES TO WRITTEN EXTRINSIC DOCUMENTS, IS THE ENTIRE AGREEMENT OF THE
PARTIES; THAT THERE ARE, AND WERE, NO VERBAL REPRESENTATIONS, WARRANTIES,
UNDERSTANDINGS, STIPULATIONS, AGREEMENTS OR PROMISES PERTAINING TO THIS LEASE OR
TO THE EXPRESSLY MENTIONED WRITTEN EXTRINSIC DOCUMENTS NOT INCORPORATED IN
WRITING IN THIS LEASE.

     15.02  Amendment.  THIS LEASE MAY NOT BE ALTERED, WAIVED, AMENDED OR
EXTENDED EXCEPT BY AN INSTRUMENT IN WRITING SIGNED BY LESSOR AND LESSEE.

     15.03  Limitation of Warranties.  LESSOR AND LESSEE EXPRESSLY AGREE THAT
THERE ARE AND SHALL BE NO IMPLIED WARRANTIES OF MERCHANTABILITY, HABITABILITY,
FITNESS FOR A PARTICULAR PURPOSE OR OF ANY OTHER KIND ARISING OUT OF THIS LEASE,
AND THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THOSE EXPRESSLY SET FORTH IN
THIS LEASE.

                                  ARTICLE 16
                                  ----------
                               OTHER PROVISIONS
                               ----------------


                                  ARTICLE 17
                                  SIGNATURES
                                  ----------

17.0 Signatures
     ----------
 
LESSOR:                                     LESSEE:
 
COMMERCE SQUARE ASSOCIATES                  HATHAWAY CORPORATION,
L.L.C., a Colorado limited                  a Colorado corporation
liability company
 
By:    /s/ Bruce D. Deifik                  By:    /s/ Richard D. Smith
    -------------------------------            -------------------------------
 
Name:  Bruce D. Deifik                      Name:  Richard D. Smith
     ------------------------------              -----------------------------
 
Title: Manager                              Title: Executive Vice President
      -----------------------------               ----------------------------
 
Date:  November 12, 1996                    Date:  November 8, 1996
     ------------------------------              -----------------------------

                                       18