1
                                                                   EXHIBIT 10.17



                     FIRST AMENDMENT TO SUBLEASE AGREEMENT

         IT IS HEREBY MUTUALLY AGREED, between the undersigned Sub-Lessor and
Sub-Lessee, that the Lease dated May 5, 1997, by and Between ABB Environmental
Systems, Inc., a division of ABB Flakt, Inc., a Delaware Corporation as 
Sub-Lessor and TXEN Inc., as Sub-Lessee, leasing the premises as described in 
the master lease and all lease amendments between Metropolitan Life Insurance 
Company and the Sub-Lessor as Suite 600, 31 Inverness Center Parkway, 
Birmingham, Alabama is hereby amended under the following terms and conditions:

         1.  ADDITIONAL SPACE: The total square footage now covered by the
             attached Sub-lease shall be amended to include 3500 square feet, on
             the third floor of 31 Inverness Parkway and part of the entire
             leased premises addressed in the above mentioned master lease.

         2.  TERM: The initial term of this amendment shall be concurrent with
             the term of the attached sub-lease beginning February 1, 1998 and
             expiring July 1, 1998.

         3.  RENTAL RATE: The rental rate for the initial term of this amendment
             will be $3000.00 per month. Rental payment beginning on February
             1, 1998

         4.  POSSESSION: Sub-lessee shall take possession of the additional
             leased space immediately upon execution of this agreement to begin
             improvements to the additional leased space.

         5.  RIGHT TO RENEW: Sub-lessee shall have the right to renew this
             portion of space as allowed in the attached sub-lease. Upon
             renewal, Sub-lessee will be assessed the rental rate, per square
             foot, stated in the above-mentioned master lease, for the entire
             3500 square feet added by this amendment.

         This amendment to lease is granted under the same terms and conditions 
as in the lease herein above described, which Lease by reference is expressly 
made a part hereof. Nothing herein contained shall operate to release or alter 
any of the terms and conditions of said lease except as above set forth.

         IN WITNESS WHEREOF, the parties hereto have respectively executed this 
document on this the   day of December 1997.

                                         ABB Flakt, Inc., a Delaware Corporation
                                         
                                         By: /s/
                                            ------------------------------------

                                         TXEN Inc.

                                         By: /s/
                                             -----------------------------------
   2

                     FIRST AMENDMENT TO SUBLEASE AGREEMENT

         IT IS HEREBY MUTUALLY AGREED, between the undersigned Sub-Lessor and
Sub-Lessee, that the Lease dated May 5, 1997, by and Between ABB Environmental
Systems, Inc., a division of ABB Flakt, Inc., a Delaware Corporation as 
Sub-Lessor and TXEN Inc., as Sub-Lessee, leasing the premises as described in 
the master lease and all lease amendments between Metropolitan Life Insurance 
Company and the Sub-Lessor as Suite 600, 31 Inverness Center Parkway, 
Birmingham, Alabama is hereby amended under the following terms and conditions:

         1.  ADDITIONAL SPACE: The total square footage now covered by the
             attached Sub-lease shall be amended to include 3500 square feet, on
             the third floor of 31 Inverness Parkway and part of the entire
             leased premises addressed in the above mentioned master lease.

         2.  TERM: The initial term of this amendment shall be concurrent with
             the term of the attached sub-lease beginning February 1, 1998 and
             expiring July 1, 1998.

         3.  RENTAL RATE: The rental rate for the initial term of this amendment
             will be $3000.00 per month. Rental payment beginning on February
             1, 1998

         4.  POSSESSION: Sub-lessee shall take possession of the additional
             leased space immediately upon execution of this agreement to begin
             improvements to the additional leased space.

         5.  RIGHT TO RENEW: Sub-lessee shall have the right to renew this
             portion of space as allowed in the attached sub-lease. Upon
             renewal, Sub-lessee will be assessed the rental rate, per square
             foot, stated in the above-mentioned master lease, for the entire
             3500 square feet added by this amendment.

         This amendment to lease is granted under the same terms and conditions 
as in the lease herein above described, which Lease by reference is expressly 
made a part hereof. Nothing herein contained shall operate to release or alter 
any of the terms and conditions of said lease except as above set forth.

         IN WITNESS WHEREOF, the parties hereto have respectively executed this 
document on this the 31st day of December 1997.


                                         ABB Flakt, Inc., a Delaware Corporation
                                         
                                         By: /s/
                                            ------------------------------------

                                         TXEN Inc.

                                         By: /s/
                                             -----------------------------------
   3
8/5/98

                             TXEN RENT CALCULATION




                                                  (1)
                       INVOICED     AMT. OF    CORRECTED    CORRECTED      AMT. OF
                       RATE PER      RENT       RATE PER      RENT           RENT
            SQ FT.      SQ FT.       PAID         SQ FT.       DUE            DUE
            ------     --------    ---------   ---------    ---------      --------
                                                         
Oct-97      15,872        12.85    17,000.00       14.24    18,838.51      1,838.51
Nov-97      15,872        12.85    17,000.00       14.24    18,838.51      1,838.51
Dec-97      15,872        12.85    17,000.00       14.24    18,838.51      1,838.51
Jan-98      15,872        12.85    17,000.00       14.24    18,838.51      1,838.51
Feb-98      18,672        12.85    20,000.00       14.24    22,162.84      2,162.84
Mar-98      18,672        12.85    20,000.00       14.24    22,162.84      2,162.84
Apr-98      18,672        12.85    20,000.00       14.24    22,162.84      2,162.84
May-98      18,672        12.85    20,000.00       14.24    22,162.84      2,162.84
Jun-98      18,672        12.85    20,000.00       14.24    22,162.84      2,162.84
Jul-98      15,872        12.85    20,000.00       14.24    18,838.51      1,838.51
Aug-98      15,872        12.85    14,000.00       14.24    18,838.51      1,838.51
            ------     --------   ----------   ---------   ----------     ---------
                                  202,000.00               230,493.92     21,845.26


- ---------------

(1)  Per article 4 of the master lease, section E, Sublessee shall pay to ABB 
     Environmental Systems additional operating expenses at the Subleased 
     Premises.

     Effective 10/1/97, the Master Lessor increased estimated operating expenses
     by $1.39 per square foot for the year beginning 10/1/97 and ending 9/30/98.

     Effective with the September lease payment, rent is due at $22,162.84 per
     month until the end of the lease or until adjusted by the Master Lessor for
     additional operating expenses.

   4

                                    SUBLEASE

         THIS SUBLEASE is made on May 5, 1997, by ABB Environmental Systems,
Inc., a Division of ABB Flakt, Inc., a Delaware Corporation ("sublandlord"),
whose address is 1400 Centerpoint Boulevard, Knoxville, Tennessee and TXEN, Inc.
("subtenant"), whose address is Suite 500, 10 Inverness Center Parkway,
Birmingham, Alabama, 35243.

RECITALS


         Whereas, Metropolitan Life Insurance Company, as landlord ("landlord"),
and sublandlord, as tenant, entered into a lease dated July 31, 1980, (the
"master lease"), with regard to Suite 600, 31 Inverness Center Parkway,
Birmingham, Alabama (the "premises"). A copy of the master lease and all lease
amendments are attached to this sublease as Exhibit A. Sublandlord wishes to
sublease to subtenant, and subtenant wishes to sublease from sublandlord, a part
of the premises encompassing the entire 5th floor containing approximately
15,872 square feet, 31 Inverness Center Parkway, Birmingham, Alabama (the
"subleased premises"). The subleased premises are depicted on Exhibit B to this
sublease. Accordingly, sublandlord and subtenant agree:

         1.  Agreement. Sublandlord subleases the subleased premises to
subtenant, and subtenant subleases premises from sublandlord, according to this
sublease. All provisions of the master lease are incorporated into, and make a
part of, this sublease as the agreement of sublandlord and subtenant as though
sublandlord was landlord under the master lease and subtenant was tenant under
the master lease.


        2.  Term. The term of this sublease will begin on July 1, 1997, and
will end on June 30, 1998, inclusive.


        3.  Rent. Subtenant will pay sublandlord as rent for the subleased
premises $17,000.00 per month, in advance, without notice, demand, offset, or
counterclaim, on the first day of each month. If the term of this sublease
begins on other than the first day of a month or ends on other than the 
last day of a month, rent will be prorated on a per diem basis.
   
   5

         4.  Acceptance of Premises. Subtenant accepts the subleased premises 
in their present condition. Sublandlord will not be obligated to make any 
alterations or improvements to the subleased premises on account of this 
sublease.

         5.  Other Charges. During the term of this sublease, subtenant will 
pay to sublandlord any increase in sublandlord's rent pursuant to Article 4 of 
the master lease.

         6.  Services. Sublandlord will not be obligated to provide any 
services to subtenant. Subtenant's sole source of such services is landlord, 
pursuant to the master lease. Sublandlord makes no representation about the 
availability or adequacy of such services.

         7.  The Master Lease. This sublease is subject to the master lease. 
The provisions of the master lease are applicable to this sublease as though 
landlord under the master lease were the sublandlord under this sublease and 
tenant under the master lease were subtenant under this sublease. Subtenant has 
received a copy of the master lease. Subtenant will not cause or allow to be 
caused any default under the master lease. Subtenant will indemnify sublandlord 
against any loss, liability, and expenses (including reasonable attorney's fees 
and costs) arising out of any default under the master lease caused by 
subtenant, and sublandlord will indemnify subtenant against any loss, 
liability, and expenses (including reasonable attorney's fees and costs) 
arising out of any default under the master lease caused by sublandlord.

         8.  Subtenant shall have the right to renew this sublease on a year to 
year basis at the same rental rate stated in paragraph three, provided that 
Subtenant gives Sublandlord one hundred twenty 120 days notice prior to the 
expiration of this sublease.

         Sublandlord and subtenant have executed this sublease on the date 
first written above.

                                        
SUBLANDLORD: ABB ENVIRONMENTAL SYSTEMS, INC.


By:  /s/
   -----------------------------------------

Date: May 5, 1997


SUBTENANT: TXEN, INC.


By:  /s/
   -----------------------------------------

Date: April 24, 1997
   6
                                                                       EXHIBIT A


                                LEASE AGREEMENT



                          COMBUSTION ENGINEERING, INC.

                                      and

                      METROPOLITAN LIFE INSURANCE COMPANY



                                  BUILDING 31

                                INVERNESS CENTER

                              BIRMINGHAM, ALABAMA


   7
                               TABLE OF CONTENTS

                            LEASE AGREEMENT BETWEEN
      COMBUSTION ENGINEERING, INC. AND METROPOLITAN LIFE INSURANCE COMPANY
                         BUILDING 31, INVERNESS CENTER,
                              BIRMINGHAM, ALABAMA




ARTICLE                                                                     PAGE
  NO.                                                                        NO.
- -------                                                                     ----
                                                                      
   1.     PREMISES.........................................................   1
   2.     TERM.............................................................   2
   3.     BASE RENTAL......................................................   3
   4.     RENT ADJUSTMENTS DUE TO CHANGES IN REAL ESTATE TAXES
          AND OPERATING EXPENSES...........................................   4
   5.     ASSIGNMENT AND SUBLETTING........................................  10
   6.     ALTERATIONS......................................................  11
   7.     TENANT'S USE OF PREMISES.........................................  12
   8.     MAINTENANCE AND REPAIRS..........................................  13
   9.     SECURITY.........................................................  13
  10.     INSURANCE AND INDEMNIFICATION....................................  14
  11.     DEFAULT OF TENANT................................................  14
  12.     RIGHT OF ENTRY...................................................  16
  13.     TENANT'S HOLDOVER................................................  17
  14.     RIGHTS OF RENEW..................................................  17
  15.     LANDLORD'S COVENANTS.............................................  18
  16.     ADDITIONAL SERVICES..............................................  22
  17.     DEFAULT OF LANDLORD..............................................  24
  18.     COMPLIANCE WITH LAW..............................................  24
  19.     CONDEMNATION.....................................................  25
  20.     RULES AND REGULATIONS............................................  26
  21.     ENTIRE AGREEMENT.................................................  26
  22.     NOTICES..........................................................  27
  23.     MEMORANDUM OF LEASE..............................................  27
  24.     GOVERNING LAW....................................................  28
  25.     DAMAGE AND DESTRUCTION...........................................  28
  26.     BUILDING SIGNAGE.................................................  28
  27.     RIGHTS OF SALE AND FIRST REFUSAL.................................  29
  28.     PARKING..........................................................  31
  29.     EATING FACILITY..................................................  31
  30.     ADDITIONAL CONSTRUCTION..........................................  31

   8
                           TABLE OF CONTENTS (con't)




ARTICLE                                                                     PAGE
  NO.                                                                        NO.
- -------                                                                     ----
                                                                      
  31.     FIRE ALARM SYSTEM................................................  31
  32.     MEASUREMENT OF PREMISES..........................................  32
  33.     PREPARATION OF PREMISES..........................................  34
  34.     INVERNESS COUNTRY CLUB...........................................  38
  35.     OPTION FOR ADDITIONAL SPACE......................................  38
  36.     BUILDING RECEPTION AREA..........................................  41
  37.     AGENT'S COMMISSION...............................................  41
  38.     USUFRUCT ONLY....................................................  42
  39.     STATUS REPORTS...................................................  42





EXHIBITS
- --------
                        
  A-1 .................... Plan of Inverness Center Office Park
  A-2 .................... Site Plan-Building 31
  A-3 .................... Floor Plan-Premises on 3rd Floor
  A-4 .................... Floor Plan-Premises on 4th Floor
  A-5 .................... Floor Plan-Premises on 5th Floor
  A-6 .................... Floor Plan-Premises on 6th Floor
  A-7 .................... Floor Plan-Premises in Basement
  B   .................... Rules and Regulations
  C   .................... Unit Price Schedule



   9

                                   L E A S E


     THIS AGREEMENT made this 3rd day of July, 1980, by and between 
METROPOLITAN LIFE INSURANCE COMPANY, a New York Corporation, with a principal 
place of business at One Madison Avenue, New York, New York 10010, (hereinafter 
referred to as "Landlord") and COMBUSTION ENGINEERING, INC., a corporation of 
the State of Delaware, with a principal place of business at 1000 Prospect Hill 
Road, Windsor, Connecticut, (hereinafter referred to as "Tenant"), and Taylor & 
Mathis of Alabama, Inc., a Georgia Corporation (hereinafter referred to as 
"Agent".)


                              W I T N E S S E T H:


     WHEREAS, Landlord desires to lease space in a building located in 
Inverness Center, Birmingham, Alabama, (hereinafter referred to as "Park") 
known as Building 31, (hereinafter referred to as "Building"); situated on Site 
7, (hereinafter referred to as "Real Property") and more particularly described 
as shown in red on the plans appended hereto as Exhibits A-1 through A-7; and,

     WHEREAS, Tenant descries to occupy all or a portion of that space and 
use it as general office space as stated in Article 7.

     NOW THEREFORE, in consideration of the mutual obligations and 
covenants hereinafter set forth, the Landlord does hereby demise and lease unto 
the Tenant the premises described below and the parties further agree that:


1.  PREMISES

     Landlord demises and leases to Tenant the space located at Building 
31, Inverness Center, Birmingham, Alabama, and all the appurtenances and 
easements thereto consisting of FIFTY-THREE THOUSAND AND FORTY-SIX (53,046) net 
rentable square feet of office space on floors 3,4,5, and 6 and THREE THOUSAND 
(3,000) usable square feet of basement space as more particularly described and 
shown in red on the plans appended hereto as Exhibits A-3, A-4, A-5, A-6 and 
A-7 (hereinafter referred to as the "Premises").


                                     Page 1

   10
2.  TERM

     The term of this lease shall be for five (5) years and shall commence on
the later of July 1, 1980, or the date upon which Building 31 and the Premises
are entirely complete and ready for Tenant's occupancy, including the Building's
paved parking areas, Tenant's improvements, installation of Tenant's telephone
system, and the issuance of all required governmental approvals and permits.
Upon actual completion of the Premises, as herein above defined in no less than
whole floor increments except for the third floor space, Tenant shall
immediately begin to occupy such entirely completed portion of the Premises, and
Tenant shall be obligated to pay rent based on the number of square feet
occupied at the time such space is occupied. Notwithstanding the above, Tenant
shall begin paying the full Base Rental as set forth in Article 3 hereof within
30 days after the completion of the entire Premises. Landlord shall notify
Tenant in writing of the projected completion date of the Premises at least
thirty (30) days prior to Landlord's anticipated completion of any portion of
the Premises. In no event will Tenant be required to take occupancy of the
Premises prior to July 1, 1980. Landlord and Tenant shall execute an amendment
to the lease setting forth the actual commencement and termination dates of this
lease within sixty (60) days after Tenant's full occupancy of the said Premises,
said commencement date shall be the first day of the month following the month
in which Tenant fully occupies the Premises. Landlord shall use its best efforts
to prepare the Premises for occupancy by July 1, 1980, in accordance with the
plans and specifications appended hereto as Exhibits A-3, A-4, A-5, A-6 and A-7.
In the event the Premises are not ready for occupancy by September 30, 1980, due
to circumstances within the reasonable control of the Landlord, Landlord shall
be obligated to pay within thirty (30) days after invoice from Tenant any added
expenses and penalties incurred by Tenant at 200 and 400 Office Park Drive and
One Office Park Circle (herein referred to as the "Existing Leases") as a result
of Tenant being


                                   Page 2

   11
required to holdover at its present locations after September 30, 1980, which 
is the expiration date for the Existing Leases (including any rent over and 
above the rent payable during the last year of the term of the existing 
leases). If Tenant must vacate its office space at 200 Office Park Drive and/or 
One Office Park Circle, then Landlord shall pay for all expenses incurred in 
moving Tenant to a temporary location and the installation cost of a temporary 
telephone system in addition to any rental cost over and above the rent payable 
during the last year of the term for the Existing Leases. If the Premises are 
not ready for Tenant's occupancy by January 1, 1981, and the delay is not due 
to the fault of the Tenant, this lease shall terminate anytime thereafter upon 
five (5) days written notice from Tenant to Landlord; or Tenant shall have the 
right to complete the Premises and charge the expense thereof, subject to 
Section A&B of Article 33, to Landlord or offset a compensating amount from 
monthly rents after occupancy.


3.  BASE RENTAL.

     Tenant shall pay to landlord as Base-Rental in accordance with Article 2
hereof the sum of NINE AND TWENTY FIVE ONE HUNDREDTHS ($9.25) DOLLARS per square
foot per annum for each square foot of the _____ building area which constitutes
the Premises on floors 3, 4, 5 and 6, and shall pay FOUR AND NO ONE HUNDREDTHS
($4.00) DOLLARS per square foot per annum for each square foot leased in the
basement. The Base Rental during each year of the term of this lease shall be
FIVE HUNDRED AND TWO THOUSAND SIX HUNDRED SEVENTY-FIVE AND 50/100 ($502,675.50)
DOLLARS. Tenant shall pay the said Base Rent in twelve (12) equal monthly
installments of FORTY-ONE THOUSAND EIGHT HUNDRED EIGHTY-NINE AND 63/100
($41,889.63) dollars payable monthly in advance. Tenant is obligated to pay rent
based on the number of square feet occupied, at the said rate of $9.25 per
square foot per annum on floors 3, 4, 5 and 6, and $4.00 per square foot per
annum for the basement area. Full rent shall commence on the earlier of the date
that

                                     Page 3
   12
tenant fully occupies the Premises, or thirty days after the Premises are 
completed pursuant to Article 2 hereof. The aforesaid rental payments shall be 
prorated to the first day of the next succeeding month.  Provided however, that 
in the event this lease commences prior to October 1, 1980, Landlord agrees 
that the monthly rental payment from the date the lease commences through 
September 30, 1980, shall be reduced by FIVE THOUSAND SIX HUNDRED THIRTY-SIX 
AND THIRTY-SIX ONE HUNDREDTHS ($5,636.36) DOLLARS (which is one-half (1/2) the 
monthly rental Tenant is obligated to pay for the remainder of its original 
lease term for space at 200 Office Park Drive, Birmingham, Alabama). The square 
footage of the Premises and the Building shall be certified to the Tenant in 
writing, at the Landlord's expense, by Sidney R. Barrett and Associates, 
Landlord's architects, in accordance with Article 32 within thirty (30) days 
after completion of the premises.

     Tenant shall make payments to Landlord, at Landlord's office or to such 
other persons and addresses as directed by notice to Tenant by Landlord in 
lawful money of the United States which shall be legal tender for debts public 
or private at the time of payment.

4.  RENT ADJUSTMENTS DUE TO THE CHANGES IN REAL ESTATE TAXES AND OPERATING
    EXPENSES.

     (A)  Base Year means the twelve (12) month period commencing the first day 
of the first month immediately following the date Tenant takes occupancy of the 
Premises as set forth in Article 2 hereof and ending twelve (12) months 
thereafter.

     (B)  Operating Year means each twelve-month period succeeding the Base 
Year.

     (C)  Tenant's Prorata Share means the ratio, expressed as a percentage, of 
the area of the Premises as set forth in Article 1 to the total net rentable 
area of the Building (excluding rentable basement storage space), which is
91,803 square feet. Tenant's Prorata Share is 57.78 percent initially. Such 
Prorata Share

                                     Page 4
   13

shall be adjusted as the area of the Premises is adjusted over the term of the 
Lease and all renewal periods.

     (D)  Real Estate Taxes means the amount (in dollars) of real property 
taxes levied or assessed against the Building and the land Upon which it stands,
in any tax year or fractional part thereof. Excluded are all estate, sales, 
gift, transfer, succession, income, franchise or similar tax.

     (E)  Operating Expense means the actual and reasonable expense incurred 
and paid by the Landlord for the operation and maintenance of the Building, 
Premises, Real Property, and Park in accordance with accepted principals of 
sound management and accounting practices as consistently applied to 
first-class office buildings, including, but not limited to: (i) Wages of 
employees, other than employees above the grade of General Manager of Inverness 
Center, to the extent of time spent in connection with operation of Inverness 
Center, including salaries, payroll taxes, social security and unemployment 
insurance, workmen's compensation insurance, disability insurance, fringe 
benefits including vacations, holidays and other proper allowances, 
hospitalization, medical, surgical, welfare, retirement, pension and profit 
sharing plans; (ii) Cleaning, vermin extermination and janitorial services and 
supplies; (iii) High quality rest room supplies and supplies used in the 
maintenance of common areas of the Building; (iv) Removal of snow, trash, 
garbage and other refuse; (v) Electrical cost and expenses; (vi) Plumbing 
repairs; (viii) Fuel, water, sewer charges and other utilities; (ix) Elevator 
maintenance; (x) grounds maintenance for the Real Property; (xi) Building 
maintenance and repairs (including, but not limited to, painting and 
redecoration); (xii) Insurance; (xiii) Security services; (xiv) Supervision of 
work performed on behalf of the Building, Premises, Real Property, and Park; 
and (xv) Premises prorata share of parkwide common area maintenance subject 
to Article 4-G(iii) hereof. Provided, however, that for the purposes of 
establishing Base Year expenses, Landlord shall include the cost of expenses 
which would have reasonably been incurred in the operation of the Building and 
Real Property, but were not actually

                                     Page 5
   14
incurred due to warranties in existence the first year of operation. The 
initial cost of these items, such as service and outside labor contracts, if 
any, related to elevator maintenance and HVAC maintenance shall be added to 
Base Year Operating Expense and escalated thereafter. No further adjustments to 
the Base Year Operating Expense shall be made.

     (F)  Notwithstanding anything to the contrary, the following expenses are 
excluded from Operating Expenses: (i) All executives' salaries and fringe 
benefits above the grade of General Manager of Inverness Center; (ii) 
Expenditures for capital improvements made to the Real Property, Building or 
Park; (iii) Expenses for painting, redecorating or other work which Landlord 
performs for any other tenant of the Building; (iv) Expenses incurred in 
leasing or procuring new tenants (including broker commissions and finder's 
fees); (v) Legal costs other than those reasonable legal expenses incurred in 
connection with protesting Real Estate Taxes when Landlord decides in good 
faith that such protest is warranted and informs Tenant in advance of its 
intention to protest; (vi) Interest or amortization payments on any mortgage; 
(vii) Depreciation and any ground rent; (viii) The cost of correcting defects, 
both structural and non-structural, in the Building, Premises or parking area 
caused by faulty design, poor workmanship or deficient materials for a period 
of two (2) years or the length of any warranty covering the cost of repairing 
the defect, whichever is longer; (xi) All costs associated with the initial 
construction of the Building; (x) Any structural repair to the roof, 
foundation, floors or exterior walls; (xi) Franchise, income or other taxes 
based on income or rent or on personal property not used directly in the 
operation of the Building, Real Property or Park; (xii) The cost of painting 
the Premises in accordance with Article 15 of this Lease; (xiii) The cost of 
any repair made by Landlord pursuant to Article 19 and Article 25 of this Lease.

     (G)  Tenant acknowledges that some Operating Expenses may be incurred by 
Landlord directly for the benefit of the Premises and shall, therefore, be 
charged directly thereto, whereas certain other Operating

                                     Page 6
   15
Expenses may be incurred by Landlord either directly for the Building and Real 
Property, or either of them, or for the Park as a whole. In computing Operating 
Expenses applicable to the Premises, there shall be three methods of charging 
or allocating Landlord's Operating Expenses as follows:

          (i)  "Direct Charge", which shall include those Operating Expenses
paid only and solely for the benefit of the Premises, or upon Tenant's express
written request;

          (ii)  "Building and Real Property Allocation", which shall include
those Operating Expenses paid only and solely in and upon the Building and the
Real Property and not with respect to the Park and not at the request of any
other tenant or user of the Building or Real Property. Tenant shall pay its
prorata share of the increase in these expenses.

          (iii)  "Common Area Allocation for the Park", which shall include
those Operating Expenses incurred only and solely in and upon common areas of
the Park (as shown on Exhibit A-1, attached hereto and made a part hereof),
outside other buildings or building sites and for the benefit of all tenants and
users of the Park and not at the specific request of any other tenant or user
thereof. The amount of such Common Area Operating Expenses for the Park
allocated to the Building shall be determined by multiplying the Common Area
Operating Expenses by a percentage, which percentage is a fraction having as its
numerator the number of acres comprising the Real Property (6.5), and as its
denominator the total number of acres comprising the Park on each anniversary
date of the Lease (81.353). The Premises will be charged with its Prorata Share
of such amount allocated to the Building. Provided, however, that the amount of
any such increase over the previous year allocable to the Building shall not
exceed ONE THOUSAND TWO HUNDRED DOLLARS ($1,200.00) in any one Operating Year.
Landlord agrees that the Common Area Expenses for the Park shall be a minimum of
$25,000.00 in the Base Year.

     (H)  Landlord agrees to keep accurate records in accordance with sound
accounting principals, consistently applied, of all Operating Expenses and to
submit to Tenant, within one hundred twenty (120) days


                                     Page 7
   16
subsequent to the expiration of the Base Year and any Operating Year, a 
statement in reasonable detail certified by any officer, or agent of Landlord 
setting forth the Operating Expenses.

    (I)  In the event the actual Operating Expenses applicable to the Premises
for any Operating Year exceed the Operating Expenses applicable to the Premises
for the Base year, Tenant shall pay such difference as adjusted for payments
received by Landlord applicable to such year pursuant to Paragraph L of this
Article 4, within sixty (60) days after receipt of a statement from Landlord.
Provided, however, such payment shall not bar Tenant from disputing and
recovering the payment of such amounts as hereinafter provided.

    (J)  In the event the actual Operating Expenses applicable to the Premises
for any Operating Year, are less than Operating Expenses applicable to the
Premises for the Base Year, as adjusted for any payments made or received by
Landlord pursuant to Paragraph L of this Article 4, Landlord shall pay the
difference to tenant within sixty (60) days of forwarding the statement to
Tenant.

    (K)  Within eighteen (18) months after receipt of a statement from Landlord
setting forth the Operating Expenses applicable to the Premises for the Base
year and within six (6) months after receipt of a statement from Landlord
setting forth the Operating Expense applicable to the Premises for any Operating
Year, Tenant shall have the right, upon ten (10) days written notice to
Landlord, to inspect and audit Landlord's records which shall be maintained at
Inverness Center or in Atlanta, Georgia. Tenant shall notify Landlord within
said eighteen (18) months or six (6) months, as the case may be, if it disputes
the inclusion of any item or items in such statements and tenant will be
promptly reimbursed by Landlord for any items improperly charged for which
tenant paid. If Landlord and Tenant cannot agree as to the inclusion of any item
or items within thirty (30 days after notice has been delivered to Landlord, by
Tenant, then Tenant may submit the dispute to arbitration and such dispute shall
be settled in accordance with the rules and regulations of the American
Arbitration Association. Any such arbitration shall be held in Shelby County,
Alabama, unless the parties otherwise mutually agree. The determination of any
such matter by the Arbitrators shall be final and binding upon both Landlord
and Tenant, and the expenses involved in such determination shall be borne by
the party against whom a decision is rendered by the Arbitrators, provided that
if more than one item is 

                          
                                     Page 8

   17
disputed and the decision shall be against each party in respect of any item or 
items so disputed, the expense shall be apportioned according to the dollar 
value of the items decided against each party.

     (L)  Landlord shall furnish to Tenant no later than 30 days before the end 
of each Operating Year, a statement certified by an authorized agent of the 
Landlord setting forth in reasonable detail the projected Operating Expenses 
for the next succeeding Operating Year. Tenant shall pay monthly beginning with 
the first month of the next succeeding Operating Year for which the expenses 
were projected, one twelfth (1/12) of said projected increase in Operating 
Expenses applicable to the Premises. Landlord agrees that for the purpose of 
Tenant making payments pursuant to Paragraph L of this Article 4, Tenant's 
share of any projected increases for the next succeeding Operating Year shall 
not be greater than twelve (12%) percent of the total Operating Expenses 
applicable to the Premises in the immediately preceding Operating Year.

     (M)  The Base Year's Real Estate Taxes shall be determined by applying the 
millage rate and the percentage used in computing assessed value applicable for 
the 1980 tax year to an estimated valuation certified by the Shelby County 
Tax Assessor's office obtained in October of 1980, but based on a completed 
building being substantially occupied. In the event this estimate is not 
available in 1980, the final assessed building value determined in October 1981 
shall be used in computing base year taxes provided, however, that millage and 
assessment rates in effect in October of 1980 shall be applied. If the taxes 
payable by Landlord during any tax year subsequent to the base tax year exceed 
the Base Year taxes, Tenant shall pay to Landlord Tenant's prorata share of 
such excess. Payment of such increase shall be made within thirty (30) days 
after the rendition of a statement in reasonable detail from Landlord setting 
forth the amount due. Such statement shall specify the Real Estate Taxes paid 
by Landlord for the base tax year and for the current tax year and shall be 
accompanied by copies of receipted tax bills indicating the payment of 


                                     Page 9
   18
such taxes. If Landlord shall receive a refund for any tax year for which 
payment has been made by Tenant, Landlord shall promptly pay Tenant its prorata 
share of such refund.

     (N)  Landlord will notify Tenant promptly of any discriminatory or 
unreasonable increase in Real Estate Taxes resulting from other than a general 
increase in the tax rate. Landlord will take all reasonable steps to contest 
any such increase, and shall keep Tenant informed, with timely advice, of the 
steps being taken. If Landlord elects not to contest such increase, Tenant may 
after advising Landlord, contest in good faith and by appropriate proceedings 
at its own expense any such tax increase or assessment. Any such contest or 
legal proceedings shall be begun by Tenant as soon as reasonably possible after 
the decision by Landlord not to contest which shall be made and notice given to 
Tenant no later than thirty (30) days in advance of the expiration date for the 
filing of any such contest. Tenant may in its discretion consolidate any 
proceeding to obtain a reduction in assessed valuation of the Premises for tax 
purposes relating to any tax year with any similar proceeding or proceedings 
relating to one or more other tax years. Anything to the contrary herein 
notwithstanding, Landlord shall pay all such contested items before the time 
when the Premises or any part thereof might be forfeited as a result of 
nonpayment. Landlord agrees to cooperate with Tenant in such contest and in the 
event Tenant is successful in such contest, Tenant will be reimbursed by 
Landlord from the recovered proceeds for any overpayment of Taxes by Tenant as 
well as Landlord's proportionate share of Tenant's cost for such recovery.


5.  ASSIGNMENT AND SUBLETTING

     Tenant may assign, sublet, transfer or dispose of all or any portion of 
the Premises only with consent of Landlord, which consent shall not be 


                                    Page 10
   19
unreasonably withheld or delayed. Landlord shall give verbal response to Tenant 
within a reasonable time after Tenant's request to assign or sublet any part of 
the Premises, and written response within twenty (20) days of Tenant's request. 
Any such disposition of this Lease shall in no way terminate the liability of 
the Tenant for the performance of and compliance with all the covenants and 
provisions of this lease on the part of the Tenant, except as may be otherwise 
agreed, and Tenant shall remain fully liable hereunder.

     Tenant's assignee or sublessee shall use the Premises for purposes in
keeping with the use provision stated in Article 7. Further, Tenant may, in all
instances, assign or sublet the Tenant's obligations under this lease to any
business entity that it controls, is controlled by or is under common control
with Tenant. Such an assignment or subletting shall not require Landlord's
consent.

     There shall promptly be delivered to Landlord the original or a duplicate
original of the instrument or instruments containing such assignment.


6.   ALTERATIONS

     The Tenant make at its own expense, and of quality equal to or better than
Landlord's Tenant Finish Standards, alterations, decorations, additions, or
improvements in or to the demised Premises without Landlord's consent provided
that such alterations, decorations, additions or modifications do not materially
affect any building system (electrical, plumbing, mechanical, elevator, HVAC).
However, if any building system will be materially affected, Landlord's consent
to such work must be obtained. All such decorations, alterations, additions, or
improvements shall be done in a workmanlike manner, in accordance with all state
and federal and municipal regulations, and in a manner that will not impair the
structural integrity of the Building. Before making any alterations, additions,
improvements, decorations or other changes in or to the


                                    Page 11
   20
Premises, whether or not Landlord's approval is required, Tenant shall first 
give Landlord the opportunity to do such work, and Landlord shall submit an 
estimate for the cost of said work. In the event Tenant feels that Landlord's 
cost estimate for the job is too high, Tenant may seek outside bids from two 
other contractors. In the event either of the two bids are lower, Landlord 
shall then have the opportunity to do the work for the lower of the cost 
submitted on such outside bids. In the event Landlord does not agree to meet 
the outside contractor's cost, Tenant may then contract with the outside 
contractor to do the work; provided, however, that Tenant shall use, at 
Tenant's expense, Sidney R. Barrett and Associates, Architects, or such other 
architectural firm as is the then Architect for Landlord, to prepare the 
working drawings for all such alterations, decorations, additions or 
modifications as well as for preparing as-built drawings of such work and 
making the appropriate changes on the Building record drawings. All such 
alterations, decorations, modifications and improvements, as well as Tenant's 
trade fixtures and personal property (including moveable partition with 
associated doors), shall remain the property of Tenant and may be removed by 
Tenant. Upon the termination of this Lease, if Tenant fails to promptly remove 
said alterations, decorations, modifications and improvements, they shall from 
that time forward be the sole and exclusive property of Landlord, and Tenant 
shall have no rights in or to the alterations, decorations, modifications and 
improvements. If the Tenant elects to remove any of the said alterations, 
decorations, improvements, Tenant shall do so in a timely manner and shall be 
responsible for repairing the Premises and placing them as nearly as possible 
in their original condition prior to the addition of Tenant's improvements, 
normal wear and tear excepted.


7.  TENANT'S USE OF PREMISES

     Tenant shall use and occupy the Premises as general office space and for
such related activities as are in concert with Tenant's business and for any
lawful purposes incidental to the use of the Premises as general office space.
Landlord warrants that Tenant's use of the Premises also includes the
installation of vending machines and appropriate lunchroom 


                                    Page 12
   21
facilities, as required by Tenant. Any subtenant, assignee, subsidiary, parent 
or controlled corporation of the Tenant or any successor to it by merger, 
consolidation or other corporate action may similarly use the Premises.

      Landlord warrants and represents that the use of the Premises set forth
herein is permitted under current laws, ordinances and regulations. Landlord
further warrants that if, at any time during the term of this lease, Tenant's
use of Premises shall become prohibited by reason of any change in the
applicable laws, ordinances and regulations, this lease shall at the option of
Tenant terminate and neither party shall have any further liability to the
other.


8.  MAINTENANCE AND REPAIRS

      Landlord shall at its expense, subject to Article 4, make all repairs and
replacements structural and otherwise, necessary or desirable in order to keep
in good order and repair the interior and exterior of the Building, all building
systems (electric, plumbing, mechanical and HVAC), the parking area and the
public portions of the Building. Landlord shall make all necessary repairs and
replacements to the Premises, subject to Article 4 hereof, unless the repairs or
replacements are caused by the negligence of Tenant, its servants, agents or
employees. Tenant and Landlord agree that each party shall notify the other of
the need or necessity of such repairs within the Premises and that all such
repairs and replacements shall be in quality and class equal to the original
work or installations and done in a workmanlike manner.


9.  SECURITY

      Landlord agrees to provide and maintain at Landlord's cost subject to
Article 4 hereof, an electronic surveillance system for the Building and
surrounding area which shall be operable and monitored during all


                                    Page 13
   22
non-business hours. In addition, after each day's janitorial cleaning services 
are performed, Landlord will turn off all lights and lock all access doors to 
the Building and the Premises.


10.  INSURANCE AND INDEMNIFICATION

     During the term of this lease, Tenant shall defend and hold harmless 
Landlord from and against any loss, claim, expense, damage or liability 
sustained by Landlord in connection with the Premises resulting from any 
negligent act or omission on the part of the Tenant, its agents, employees, or 
invitees. Likewise, during the term of this lease, Landlord shall defend and 
hold harmless Tenant from and against any loss, claims, expense, damages or 
liability sustained by Tenant in connection with the Premises resulting from 
any negligent act or omission on the part of Landlord, its agents, employees or 
invitees. Tenant shall, at its expense, cause to be placed in effect upon the 
commencement of the term hereof and cause to remain in effect comprehensive 
general liability insurance in the amount of $5,000,000.


11.  DEFAULT OF TENANT

     If any one or more of the following happen (hereinafter referred to as 
"Event or Events of Default"):

     (a)  If default shall be made in the due and punctual payment of the base 
rent and all other charges payable under this lease when and as the same shall 
become due and payable, and such default shall continue for a period of ten 
(10) days after written notice from Landlord to Tenant without being cured by 
Tenant; or

     (b)  If default shall be made by Tenant in the performance of or 
compliance with any of the covenants, agreements, terms or conditions contained 
in this lease, other than that contained in subsection (a) hereof, and such 
default shall continue for a period of thirty (30) days after written notice of 
said defaults received by Tenant, and Tenant shall


                                    Page 14
   23
not have cured said default in that time or within such period as may 
reasonably be required to remedy the default (if the default cannot be cured 
within said thirty (30) day period) if Tenant has not begun and is not 
proceeding with all due diligence to cure said default; or

     (c)  If Tenant shall file a voluntary petition in bankruptcy or shall be
adjudicated a bankrupt or insolvent or shall file any petition or answer seeking
any arrangement, liquidation, dissolution or similar relief under present or
future federal bankruptcy law or any other applicable state or federal law or
shall seek or consent to or acquiesce in the appointment of any trustee,
receiver or liquidator of Tenant or of any or all of its properties or of the
Premises, and, if within seventy-five (75) days after the commencement of any
proceeding against Tenant as enumerated in this subsection, said proceeding has
not been dismissed or if within seventy-five (75) days after the appointment of
any trustee, receiver or liquidator of Tenant for all or any portion of Tenant's
properties, including the Premises, such appointment shall not be vacated or
otherwise stayed; then and in any such event Landlord, at any time thereafter,
as long as such default continues, may give notice to Tenant specifying such
event of default or events of default and stating that this lease and the term
hereby demised shall expire and terminate on the date specified in such notice,
which shall be at least ten (10) days after giving such notice, and upon the
date specified in said notice this lease shall terminate and expire. Upon such
termination Tenant shall remain liable as hereinafter provided unless before
said termination date Tenant has paid all arrearages of rent, all other amounts
payable by Tenant under this lease and all costs or expenses incurred by
Landlord as a result of said default, including reasonable attorneys' fees and
all other defaults existing at that time under this lease have been fully cured
or satisfied by Tenant in which event the consequences of such default shall be
nullified.


                                    Page 15
   24
     Upon any such expiration or termination of this lease Tenant shall quit and
peacefully surrender the Premises to the Landlord without any payment therefor 
by Landlord, and Landlord, upon or at any time after said expiration or 
termination, may re-enter the Premises and possess itself thereof by use of 
legal process; and, the Tenant shall continue to pay at the same time as the 
rent becomes due and payable under the terms hereof, the base rent, as adjusted 
in accordance with Article 4 herein, until such time as Landlord shall re-rent 
the Premises. At such time as the Premises are re-rented, Tenant shall remain 
liable until the amounts due and owing to Landlord as default amounts have been 
paid in full. No receipt of monies by Landlord from Tenant after the 
termination in any way of this lease, shall re-instate, continue or extend the 
term of this lease or affect any notice given to Tenant prior to receipt of 
such money but may so operate only upon the specific written agreement of 
Landlord. Landlord and Tenant, and each of them, shall have, upon any default 
under the terms and conditions of this Lease Agreement, such remedies available 
to them as are provided herein together with such other remedies as may be 
available to the parties at law or in equity, none to the exclusion of the 
other. The waiver of any default or breach hereunder shall not prevent a 
subsequent act, which would have originally constituted a default or breach, 
from having all the force and effect of an original default or breach. The 
receipt and acceptance by Landlord or Agent of rent shall not constitute a 
waiver of any default or breach hereof by Tenant of which Landlord then has 
knowledge except where said default or breach by Tenant is non-payment of the 
rent so received or accepted.

12.  RIGHT OF ENTRY

     Tenant agrees that Landlord, its agents or employees will be permitted 
access to the Premises at all reasonable times upon reasonable notice to the 
Tenant to examine, inspect or to protect the Premises from damage or injury. 
Nothing herein shall be construed as prohibiting Landlord, its agents, or 
employees from entering the Premises without

                                    Page 16
   25
notice in case of emergency to prevent damage or injury to the Premises. 
Landlord shall further have the right to enter the Premises upon reasonable 
notice to Tenant during the last six (6) months of the term hereof to exhibit 
the Premises to prospective tenants.


13.  TENANT'S HOLDOVER

     On the termination or expiration of this Lease, the Premises shall be 
surrendered to Landlord in the condition in which Tenant is required to 
maintain same, reasonable wear and tear and damage by fire or other action 
beyond Tenant's control excepted.

     Upon notice to Landlord, at least 30 days prior to expiration of the 
lease, of Tenant's inability to vacate Premises due to reasons beyond Tenant's 
control, Landlord shall grant Tenant the right to remain in the Premises for a 
period of sixty (60) days beyond the normal lease expiration date at the 
monthly rental rate then in effect; provided, however, that Tenant shall be a 
tenant at will during said period and there shall be no renewal of this Lease 
by operation of law. Upon the expiration of this additional sixty day period, 
Tenant shall surrender the Premises to Landlord.


14.  RIGHTS TO RENEW

     Tenant shall have the right to renew this lease for three (3) successive
periods of five (5) years each. In order to exercise any of these three (3)
options, Tenant must provide written notice to Landlord at least six (6) months
prior to the expiration date of the initial lease term or any renewal term. Each
and every renewal option shall be effective for all space under lease by Tenant
in Building 31 at the time the option is exercised. Each renewal period shall be
governed by the same terms and conditions of this lease excepting Base Rental,
as defined in Article 3 hereof, which shall be governed by the following
schedule:

     A.  First Option Period: 5% increase over the Base Rental at the time the 
         option is exercised for that space under lease.

     B.  Second Option Period: 5% increase over first option period Base Rental 
         at the time the option is exercised for that space under lease.

     C.  Third Option Period: 5% increase over second option period Base Rental 
         at the time the option is exercised for that space under lease.


                                    Page 17
   26
In addition, the parties intend that the phrase "governed by the same terms and 
conditions" shall be applicable as to each successive Renewal Period, but shall 
not apply to provide additional renewal options beyond the Third Option Period. 
In each instance the Base Year for the calculation of property tax and 
operating expense adjustments remains the same as defined in Article 4 hereof.


15.  LANDLORD'S COVENANTS

      Without limiting the generality and effect of any other provision of this
lease, Landlord covenants that:

      (A)(i)  Landlord has the right and authority to execute this lease; (ii)
that Tenant, on paying the rent herein reserved and upon performance of all the
terms and conditions of this lease on its part to be performed, shall at all
times during the term hereof peacefully and quietly have, hold and enjoy the
leased Premises; (iii) Landlord further covenants and agrees that Tenant's
employees, agents, invitees and visitors shall have the right at all times to
unhindered access to and egress from the Building, the Premises and parking lot.

      (B)  To the extent permitted by the laws and insurance regulations of
Alabama, without penalty or extra premium charge therefor, the respective
parties hereto hereby waive and release any and all claims, demands and causes
of action which each might have against the other party, either for damage to or
loss of any part of the leased Premises, the Building, or of any adjoining
premises belonging to Landlord, or for damage to or loss of any of the contents
and/or leasehold improvements belonging to Tenant, arising from perils
ordinarily insured against under a standard fire and extended coverage
insurance policy whether or not such damage or loss is occasioned by the
negligence of the respective parties, or either of them, their agents, servants
or employees to the extent of said coverage against perils ordinarily insured
against under a standard fire and extended coverage insurance policy. The
provisions of this Paragraph B shall prevail over the provisions of Article 10
of this lease.

      (C)  Landlord will furnish the following facilities, maintenance and
services, at its expense subject to Article 4 and Article 16, and in a
first-rate manner commensurate with the usual standard of a first class office
building:

           (i)  Electricity for ordinary office uses including normal lighting,
                and normal business machines.


                                    Page 18

   27
           (ii)    Elevator service at all times.

           (iii)   The painting of all portions of walls, columns, and
                   partitions, other than moveable partitions, as is necessary
                   to maintain the leased Premises in a first-class condition.
                   Provided, however, Landlord shall completely repaint the
                   Premises during the third year of the initial lease term and
                   during the third year of any renewal term in all space leased
                   by Tenant, at Landlord's sole expense. Said repainting(s)
                   shall be done in colors selected by Tenant from Landlord's
                   Tenant Finish Standards, but in the manner and at times
                   mutually convenient to Landlord and Tenant. Such repainting
                   of the entire Premises shall not be subject to Article 4, of
                   this lease.

           (iv)    Heating, ventilating and refrigerated air conditioning, in
                   season, in accordance with ASHRAE standards during the hours
                   from 7:30 a.m. to 5:30 P.M., Monday through Friday, and 7:30
                   A.M. to 12:30 P.M. Saturday (hereinafter referred to as
                   "Building's Regular Business Hours"), except holidays
                   observed jointly by Landlord and Tenant. Provided however,
                   Landlord agrees, at Landlord's cost subject to Article 4 and
                   Article 16 hereof, to provide all Building services and
                   utilities for Tenant on those holidays where the Building is
                   considered closed but Tenant's offices are open for business.

           (v)     Building access and all services and utilities necessary to
                   permit use of the leased Premises by Tenant at any time after
                   Building's Regular Business Hours, subject to the provisions
                   of Article 16.

           (vi)    Toilet facilities as indicated on Exhibit A-3, A-4, A-5 and
                   A-6, attached hereto, together with necessary toilet
                   supplies, hot and cold water, and sewage disposal.

           (vii)   Repair and replacement of Building Standard window draperies
                   and rods, if any, and/or blinds, as necessary.


                                    Page 19
   28
           (viii)  Refrigerated drinking water.

           (ix)    Janitorial services on a five (5) day per week basis, which
                   janitorial services shall include:

                   Daily-Five days per week (Monday through Friday, after
                   Tenant's business hours, except Holidays).

                               CLEANING SCHEDULE

(a)  General Cleaning-Nightly

      1.  Clean entrance doors

      2.  Dust, sweep or vacuum all flooring and carpeting and insure dust free
          flooring.

      3.  Empty and clean all waste baskets, ash trays, etc., damp dust as
          necessary.

      4.  Clean cigarette urns and replace sand or water as necessary.

      5.  Remove wastepaper and waste materials to a designated area.

      6.  Dust and wipe furniture, fixtures, desks, equipment, displays,
          telephones and window sills.

      7.  Dust or damp dust counters, work tables, shop windows and metal trim.

      8.  Wipe fingerprints, smudges, ink stains from all surfaces.

      9.  Brush upholstered furniture.

     10.  Dust baseboards, chair rails, trim, louvres, etc. (within reach)

     11.  Wash drinking fountains.

     12.  Wash counter tops.

     13.  Wash floor mats.

     14.  Wipe name plates.

     15.  Leave locker and service closet in a clean and orderly manner.

     16.  After each day's cleaning, Landlord will turn off the lights in the
          Premises and lock all access doors to the Building and Premises.


(b)  Lavatory Cleaning-Nightly

      1.  Sweep and wash flooring with a germicidal solution.

      2.  Wash and polish mirrors, powder shelves, brightwork, etc.

      3.  Wash both sides of toilet seats and urinals including piping, hinges,
          bowls, basins, etc. with a germicidal detergent solution.


                                    Page 20


   29
    4.  Dust partitions, tile walls, dispensers and receptacles.

    5.  Empty and clean towel and sanitary disposal receptacles.
    
    6.  Remove wastepaper and refuse to a designated area.

    7.  Refill toilet tissue holders, soap and towel dispenses with high 
        quality supplies furnished by Landlord.

    
(c)  Recurrently as Necessary

    1.  Dust door louvres and other ventilating louvres within reach when 
        necessary.

    2.  Remove fingerprints from metal partitions and other similar surfaces
        when necessary.

    3.  Wash and polish glass or glass topped furniture as required.

    4.  Machine or hand scrub lavatory floor with germicidal solution
        when necessary.  

    5.  Machine or hand scrub entrance flooring as necessary.

    6.  Clean lights, globes and lighting fixtures as required.

    7.  Rub down entrance way metal and other high level brightwork as 
        necessary.

    8.  Keep Premises free from rodents, insects and pests.

    9.  Replace flourescent tubes and ballasts as necessary.

   10.  Spot clean carpet as necessary.


(d)  Weekly Cleaning

    1.  Damp mop and touch up vinyl asbestos tile areas in traffic areas and 
        pivot points, buff if necessary.

   
(e)  Monthly Cleaning

     1.  Wash lavatory partitions, tile walls and enamel surfaces with 
         germicidal detergent solutions.
  
     2.  Dust exterior of lighting fixtures.



                                    Page 21





    

     
   
   30

         3.  Dust down entrance walls.

         4.  Dust pictures, frames, etc. not reached in nightly cleaning.

         5.  Dust exterior of lighting fixtures, overhead pipes, sprinklers.

         6.  Dust blinds/window hangings and window frames.

         7.  Dust all vertical surfaces such as partitions, etc. not reached in 
             nightly cleaning.

         8.  Wash and apply coating of slip prevention finish to all resilient
             floor areas once each month. (Strip finish periodically and apply
             two coats.)


(f)  Window Washing

         1.  Wash interior and partition glass as required.

         2.  Wash exterior windows inside and out as required.


(g)  Entrance Lobby

         1.  Clean entrance doors nightly.

         2.  Wash and scrub clean lobby floor as required.

         3.  Wash lobby windows inside and out once a month.


(h)  Tenant shall have the right, upon occupying one hundred percent of the
     Building, to assume the obligations of Landlord for cleaning Tenant's
     Premises, if Tenant should become dissatisfied with the quality of these
     cleaning services provided by Landlord. The cost of said cleaning services
     will then be borne by the Tenant rather than the Landlord.


16.  ADDITIONAL SERVICES

     (1)  Landlord shall provide heating, ventilation and air-conditioning at
     times other than during Building's Regular Business Hours subject to the
     following provisions:

          (a) Tenant shall notify Landlord of the necessity for after-hours
          heating and air conditioning services no later than 2:00 P.M. on the
          day such services are required; provided however, that notification
          for services required on Saturday or Sunday must be given by 2:00 P.M.
          on the preceding Friday. Said notification may be verbal, but shall be
          reduced to writing within two (2) business days thereafter.


                                    Page 22
   31
          (b)  Tenant shall pay a charge of $20.00 per hour floor for the first
          floor required by Tenant and a charge of $15.00 per hour per floor
          for each additional floor required by Tenant for said service
          after-hours. Said charge will be billed monthly by Landlord and Tenant
          shall pay Landlord within fifteen (15) days of receipt of such bill.

          (c)  The said charges of $20.00 and $15.00 per hour per floor, as set
          forth above, shall be subject to increases from time to time due to
          increases in the cost of electricity as charged by Alabama Power
          Company, or successor thereto, over the cost of electricity as charged
          by Alabama Power Company for the month of July 1980.

     (2)  Landlord and Tenant recognize that electricity consumed by Tenant may
     be in excess of electricity consumed in comparable office buildings for
     ordinary lighting levels and normal business machine usage during normal
     operating hours; and agree that at the end of the Base Year, Tenant and
     Landlord will attempt, in good faith, to quantify such excess use of
     electricity, if any. Tenant further agrees to pay to Landlord the cost of
     such excess electricity used during the Base Year and agrees that the Base
     Year Operating Expenses shall be reduced by the amount of such excess.

     (3)  Tenant shall pay for all electricity required to operate
     data-processing computer machine installation(s) and ancillary key-punch or
     other data-input operations contained in separate data-operations rooms.
     Such operations shall be separately metered and billed, at the rate then in
     effect with Alabama Power Company, monthly, directly to Tenant by Landlord.
     Tenant shall pay Landlord such additional charges within fifteen (15) days
     or receipt of said bill. Furthermore, Tenant shall be solely responsible
     for the cost of furnishing, operating, maintaining, and repairing the
     heating, ventilating and air conditioning system required for
     data-processing and data-input rooms installations.



                                    Page 23
   32
17.  DEFAULT BY LANDLORD

      If Landlord shall default in fulfilling any of the covenants or provisions
of this Lease on its part to be performed and shall fail to remedy the default
within thirty (30) days (except that any default consisting or amounting to
dispossession of the Tenant shall be immediately actionable) after Tenant shall
have given Landlord written notice of such default, then Tenant shall have the
rights, powers or remedies permitted to it by law and shall have, without
limiting the generality of the foregoing, the right to (a) remedy Landlord's
default and charge Landlord for the cost of remedying the default by withholding
rent or otherwise, or (b) allow the default to continue and reduce the payment
of rent by reason of the default. If Landlord does not remedy such default
within one hundred eighty (180) days after Tenant's written notice of default,
then Tenant, while such default shall continue, shall have the further right to
give Landlord written notice of its intention to terminate this Lease on the
date of such notice or on any later date; and on the date specified in such
notice, Tenant's obligation to pay rent shall cease and this Lease shall
terminate. Provided, however, that Tenant shall not have the right to terminate
this Lease as aforesaid if Landlord is using his best efforts to cure said
default.


18.  COMPLIANCE WITH LAW

      Landlord shall at its own expense promptly observe and comply with all
present and future laws, ordinances, requirements, orders directions, rules and
regulations of the federal, state, county and city governments and of all other
governmental authorities having or claiming jurisdiction, directly or
indirectly, over the Premises, Building or appurtenances or any part thereof
(including, but not limited to, such regulations or standards as are or may be
promulgated under the Federal Occupational Safety & Health Act of 1970 as
amended or similar federal, state or local requirements pertaining to the
Tenant's use of the Premises and the Building), whether the same are in force at
the commencement of the term or may in the future be passed, enacted or
directed. Without 


                                    Page 24
   33
limiting the generality of the foregoing, the Landlord shall also procure each 
and every permit, license, certificate or other authorization required in 
connection with the lawful and proper use of the Premises, Building, or 
appurtenances or any part thereof, as now or hereafter constituted.


19.  CONDEMNATION

      In the event the entire Premises shall be appropriated or taken under the
power of eminent domain by any public or quasi-public authority this lease shall
terminate and expire as of the date of taking and each party shall be released
from liability to the other except to the extent that any rents paid for periods
subsequent to the date of taking shall be refunded to Tenant.

      In the event that a portion of the Premises or a portion of the Building
of which the Premises are a part is condemned or taken by eminent domain so as
to render the Premises substantially unusable, Tenant shall have the right to
cancel and terminate this lease effective as of the date of taking by giving
notice to Landlord of that intention within forty-five (45) days after receipt
from Landlord of notice of such appropriation or taking. Any taking or
appropriation by eminent domain proceedings or condemnation shall be deemed to
render the Premises substantially unusable hereunder if such appropriation or
taking will result in Tenant's ability to use any portion of the Premises in
the manner in which and for the purposes for which it has been or may be used
under this lease. In the event of such termination each party shall be released
from liability to the other except to the extent that any rents paid for
periods subsequent to the date of taking shall be refunded to Tenant.

      Eminent domain proceeds shall be paid to Landlord, but the Landlord shall,
and hereby does, assign to Tenant an amount out of such award equal to the sum
of (a) the amount attributable to Tenant's trade fixtures and personalty in the
Premises so taken, which fixtures and personalty Tenant elects not to remove;
(b) the cost incurred by Tenant in moving from the condemned Premises in the
event the lease is terminated.


                                    Page 25
   34
     In the event that less than the whole of the Premises are so appropriated
or taken and Tenant elects not to terminate this lease but shall remain in the
portion of the Premises not so appropriated or taken, then the Base Rent to be
paid hereunder to Landlord shall abate and Tenant shall pay only the portion of
the Base Rent that is in proportion to the space remaining.


20.  RULES AND REGULATIONS

     Tenant covenants that the rules and regulations appended hereto as Exhibit 
B, unless in conflict with the terms and provisions of this lease, and such 
other further rules and regulations as the Landlord may make and which are, in 
Landlord's judgment, necessary and appropriate for the general well being, 
safety, care and cleanliness of the Premises and the Building of which they are 
a part, shall be faithfully kept, observed and performed by Tenant, its agents, 
servants and employees, but only to the extent that such rules and regulations 
are reasonable and uniformly applied to all tenants in the Building and not in 
conflict with the terms of this lease.


21.  ENTIRE AGREEMENT

     It is expressly understood and agreed by and between the parties hereto 
that this lease and the exhibits appended hereto set out all the promises, 
agreements, conditions, inducements and understandings between Landlord and 
Tenant relative to the Premises and that there are not promises, agreements, 
conditions, understandings, inducements, warranties or representations, oral 
or written, express or implied between them except as herein set forth. This 
lease shall not be modified or amended in any manner except by an instrument in 
writing executed by the parties.


                                    Page 26
   35
22.  NOTICES

     Any notice to be given by either party to the other pursuant to this lease 
or to the provisions of any law, present or future, shall be given by 
registered or certified mail, return receipt requested, addressed to the party 
for whom it is intended at the address stated below or any other address 
designated.

     If to Landlord:  Vice President                   Vice President
                      Metropolitan Life            &   Metropolitan Life
                      Insurance Company                Insurance Company

                      One Madison Avenue               47 Perimeter Center East,

                      New York, New York, 10010        Suite 650

                                                       Atlanta, Georgia, 30346


     If to Tenant:    Vice President-Finance and Administration

                      Combustion Engineering, Inc.

                      Inverness Center, Building 31

                      Birmingham, Alabama 35243

with a copy to: Combustion Engineering, Inc., Corporate Real Estate Department,
1000 Prospect Hill Road, Windsor, Connecticut 06095.


23.  MEMORANDUM OF LEASE

     The parties agree that concurrently with the execution of this lease they 
shall execute a memorandum of lease, in recordable form, to be recorded in the 
land records of Shelby County setting forth:

               (a)  names of the parties hereto

               (b)  addresses of the parties hereto

               (c)  the existence of any renewal options

               (d)  any other terms required by statute or deemed appropriate 
                    by the parties; provided, however, that Tenant's rights to 
                    expand the Premises shall not be included in such a 
                    memorandum.


                                    Page 27
   36
24.  GOVERNING LAW

     This lease shall be construed in accordance with the laws of the State of
Alabama.


25.  DAMAGE AND DESTRUCTION

     If the Premises or any part thereof shall be damaged by fire or other
casualty, Tenant shall give immediate notice thereof to Landlord and this Lease
shall continue in full force and effect except as hereinafter set forth. If the
Premises or any part thereof or any portion of the Building are partially
damaged or rendered partially unusable by fire or other casualty, such damages
shall be repaired by and at the expense of Landlord and this Lease shall not
terminate, and the Base Rent, until such repair shall be completed, shall be
apportioned from the day following the casualty according to the part of the
Premises which is unusable. If said repairs are not completed within one hundred
eighty (180) days from the date of said damage or if said repairs have not
commenced within thirty (30) days from the date of said damage, or Landlord is
not proceeding diligently after commencing with said repairs, then this Lease
shall be immediately terminable at the option of the Tenant.

     Landlord shall give Tenant written notice within ten (10) days after the 
date of any casualty as to whether said repairs can be completed within one 
hundred eighty (180) days; if said repairs cannot be completed within one 
hundred eighty (180) days or if Landlord fails to give proper notice within ten 
(10) days, then Tenant shall have the right, at Tenant's option, to terminate 
this Lease anytime after receipt of Landlord's notice or said ten (10) day 
period.

     If the Premises are totally destroyed by fire or other casualty, then the 
Base Rent and all other charges due from Tenant pursuant to this Lease shall be 
paid up to the time of the casualty and at either party's option this Lease 
shall terminate, provided written notice is given the other party within 30 
days of such destruction.

26.  BUILDING SIGNAGE

     At the request of Tenant, Landlord shall design, install and maintain an 
exterior, free-standing sign to be located at the street entrance to Building 
31 and/or adjacent to Building 31. The cost of the sign and installation at the 
street entrance and adjacent to the Building shall be


                                    Page 28
   37
paid by Tenant. Such signs shall conform to municipal and other applicable laws 
and regulations and shall be subject to Tenant's approval as to their design, 
size and location.

     Tenant may design, install and maintain at its expense signs containing 
Tenant's corporate identification and lettering and other appropriate 
information on, above or beside all doors leading into the Premises, in 
accordance with Combustion Engineering, Inc.'s corporate standards and 
Landlord's signage standards and subject to Landlord's approval as to their 
design, size and location, which approval shall not be unreasonably withheld or 
delayed.

     Landlord shall maintain at its expense in the Building lobby a suitable 
directory for the tenants in the Building and Tenant shall be allotted, without 
charge therefor, Tenant's prorata share of the spaces on such directory, as 
determined by Article 4 (C). Landlord agrees that such directory shall list, as 
Tenant shall determine, Tenant's name and the name of any affiliate or 
subtenants.


27.  RIGHTS OF SALE AND FIRST REFUSAL.

     If Landlord shall desire to sell the Building and the Real Property, apart 
from the rest of Inverness Center, Landlord may consummate such sale only if 
(a) such sale is to a corporation affiliated with Landlord, or (b) compliance 
has been made with the provisions and conditions of Subsections (i) through 
(v) of this Article 27.

     (i)  Landlord shall deliver to Tenant a written statement reflecting the 
price for which, and the terms upon which, Landlord would be willing to sell 
the Building and the Real Property.

     (ii)  Tenant shall have the right to purchase the Building and the Real 
Property at the price and on the terms contained in such statement.

     (iii)  Tenant shall have a period of thirty (30) days after the service of 
such statement to serve upon Landlord a notice which shall specify whether 
Tenant shall purchase the Building and the Real Property. If Tenant fails to 
respond within the allocated time, Tenant shall be deemed to have elected and 
agreed not to purchase. If Tenant shall have served upon Landlord a notice 
specifying that Tenant shall purchase the Building and the Real Property, and 
if Tenant shall thereafter fail or refuse to 


                                    Page 29
   38
close such purchase as required by Subsection (iv) of this Article 27, Landlord 
may bring (1) any proceeding in the nature of injunction or other equitable 
remedy, it being acknowledged by Tenant that damages at law may be an 
inadequate remedy for such failure or refusal of Tenant to close such purchase, 
and (2) any action at law against Tenant in order to recover damages. 

     (iv)  Any closing in respect to the sale of the Building and the Real 
Property to Tenant shall be held within thirty (30) days after the notice sent 
by Tenant as provided in Subsection (iii) of this Article 27.

     (v)   If Tenant elects not to purchase the Building and the Real Property, 
Landlord will have the right for a period of one year from its delivery of the 
statement described in Subsection (i) of this Article 27, to sell the Building 
and the Real Property at a price and on terms no less favorable to Landlord 
than those specified in such statement. For the purposes of this Section 27, 
the price for which and the terms upon which Landlord shall sell the Building 
and the Real Property shall be deemed "less favorable to Landlord" than those 
reflected in such statement if (a) the total price is lower than that set forth 
in such statement, (b) a lesser portion of the price is paid in cash at the time
of the sale than that set forth in such statement, or (c) the portion of the 
price not paid in cash at the time of the sale is payable over a longer period 
of time, at a lower interest rate or with lower periodic payments than those 
set forth in such statement. If Landlord does not sell the Building within one 
year from delivery of the statement described in Subsection (i) above then 
Tenant's rights as described in Subsections (i) through (iv) shall reapply 
after said one year period. 

           If Landlord decides, after notice to Tenant as described in 
Subsection (i) above, to sell the Building on terms "less favorable to 
Landlord" as described in Subsection (v) above; then Landlord must notify 
Tenant of said less favorable terms and Subsection (ii) through (iv) shall 
reapply. 

                                    Page 30
   39
28.  PARKING

     Landlord shall provide, at no expense to Tenant, one parking space for each
240 square feet of office space leased in Building 31 by Tenant during the
initial lease term or any extension thereof. This ratio shall remain constant
and shall apply equally to any expansion space, other than basement space,
leased by Tenant. Said parking spaces shall be located in the paved and lighted
parking lot adjacent to the Building as shown in red on Exhibit A-2 attached
hereto. Landlord shall provide, as part of the agreed upon parking, five parking
spaces for each floor Tenant occupies completely as reserved parking. These
spaces shall be appropriately marked by Landlord and located as outlined in blue
on the attached Exhibit A-2.

29.  EATING FACILITY

     As part consideration for Tenant entering into this lease, Landlord 
agrees, covenants and warrants that it shall provide a sandwich eating 
facility in the basement of Building 31 for the common use of Tenant's 
employees, invitees and others within thirty (30) days after Tenant takes 
occupancy. Thereafter, Landlord shall use its best efforts to provide such a 
facility. Said facility shall be adequate to provide sit down service for 
approximately sixty (60) persons, and shall provide facilities for the warming 
of food but not for the cooking of food.

30.  ADDITIONAL CONSTRUCTION

     Landlord hereby covenants and agrees that all other buildings to be built 
in Inverness Center will be comparable in quality to Building 31. Landlord will 
take reasonable measures to protect Tenants's property and personnel from loss 
and injury and to avoid disrupting Tenant's regular business routine during any 
construction. 

31.  FIRE ALARM SYSTEM

     Landlord agrees to install and maintain internal fire alarm system, 
including emergency lighting in fire stairs and fire extinguishers and fire 
hose cabinets adjacent to the fire stairs on each floor, at no cost to Tenant. 
Said alarm system shall comply with all present and future requirements of 
federal, state, county and city governments and of all other governmental 
authorities having jurisdiction.

                                    Page 31
   40
32. MEASUREMENT OF PREMISES


     The rent stated in Article 3 is calculated on the basis of $9.25 per square
foot per year for the net rentable floor space occupied on floors 1 through 6 by
Tenant. The net rentable floor space was calculated by using the following basis
of measurement:

          (1)  The net area of a single tenant office floor, other than the 
               first floor, is computed as follows:

               (a)  Measure from the inside surfaces of the glass in the outer
                    Building walls to the inside surfaces of the glass in the 
                    opposite outer Building walls and calculate the resulting 
                    square foot area;

               (b)  Measure the following excluded area: Building stairs, fire
                    towers, elevator shafts and elevator machine rooms with
                    their enclosing walls, tank rooms, flues, vents, stacks,
                    ducts, and pipe shafts with their enclosing walls, except
                    those in columns and projections necessary to the Building
                    and calculate the resulting square foot area. The square
                    foot area resulting from subtracting (b) from (a) is the net
                    rentable area. 

          (2)  The net rentable area of a multi-tenant office floor, other than
               the first floor, is computed as follows: 

               (a)  Measure from the inside surfaces of the glass in the outer
                    Building walls to the inside surfaces of the glass in
                    opposite outer Building walls and calculate the resulting
                    square foot area; 

               (b)  Measure the Premises from the inside surfaces of the glass
                    in the outer Building walls to the inside surfaces of the
                    glass in the opposite Building walls or to the middle of any
                    demising walls or corridor walls or to the outside surface
                    of any core walls wherever applicable and calculate the
                    resulting square foot area;

                                    Page 32
   41
     (c)  Measure the following excluded areas: Building stairs, fire towers,
          elevator shafts, elevator machine rooms with their enclosing walls,
          tank rooms, flues, vents, stacks, ducts and pipe shafts with their
          enclosing walls, except those in columns and projections necessary to
          the Building and calculate the resulting square foot area;

     (d)  Measure the following common areas: passenger and service elevator
          lobbies, men's and women's rest rooms, telephone, electric and janitor
          closets, and common corridors and calculate the resulting square foot
          area.     

                         Tenant's square foot area is developed by applying the
                   results of (a) (b) (c) and (d) above in the following
                   formula: 
         
                   (1) a-(c+d)=e (Net usable floor area)
                   (2) b/e = f%  (Tenant's share of net usable floor area)
                   (3) f% x d=g  (Tenant's share of common area)
                   (4) b+g =      Tenant's net rentable area on a multi-tenant 
                                  floor.

                    The square foot area for basement space is calculated by
                    measuring the distance between the inside surface of two
                    opposite perpendicular walls and the distance between the
                    two adjacent opposite perpendicular walls. The two numbers
                    derived should be multiplied to arrive at a square foot
                    area. The square foot area resulting is multiplied by $4.00
                    and the result is the annual rent for basement space. 
                                  
          (3)  The net rentable area for space occupied on the first floor of 
               the building is computed as follows:

               (a)  In the event the first floor is occupied by tenants other
                    than Tenant, the formula for computing the area of


                                    Page 33

                               
   42
                    a multi-tenant office floor is used, as described 
                    hereinabove in Section (2) of this Article 32, except that 
                    the area of the Building entrance lobby is included in the
                    common areas set forth in subsection (d) of said section 
                    (2);

               (b)  In the event the first floor is occupied completely by 
               Tenant, the formula for computing the area of a single tenant
               office floor is used, as described hereinabove in Section (1) of
               this Article 32, except that the area of the Building entrance
               lobby is included in the Tenant's space as set forth in
               subsection (a) of said Section (1).


33.  PREPARATION OF PREMISES

     (A)  Prior to the commencement date of this lease Landlord will, at 
Landlord's sole cost, complete the following improvements to the Building and 
Premises in a first class and workmanlike manner:

          (1)  Finished, insulated and soundproofed perimeter walls, core 
walls, corridor walls and demising wall on the third floor and basement of the 
Building.
          
          (2)  Two (2) building standard, solid core, tenant entrance doors on 
third floor and one (1) in the basement of Building with building standard 
hardware and locksets;

          (3)  Building standard finished elevators, stairwells, core walls, 
building entrance, first floor elevator lobby and building standard restrooms 
on all floors; and elevator lobby on the multi-tenant floor.

          (4)  Suspended 2' X 2' lay-in-grid accoustical tile ceiling 
throughout the Premises, excluding basement space, and factory finished panels.

          (5)  Recessed lighting fixtures, installed as specified on lighting 
plans to be approved by Tenant prior to installation, sufficient to maintain a 
minimum of 80 foot candles of illumination at desk level uniformly distributed 
throughout the Premises, excluding basement space, complete with acrylic 
lenses, lamps and ballasts on floors one through 6 of the Building; and a 
minimum of 50 foot candles of illumination in the basement supplied by hanging 
strip lighting.



                                    Page 34
   43
         (6)  Building standard Levelor blinds with all necessary hardware at
all windows. Building standard drapery pockets at all windows on the second
through sixth floors of the Building.

         (7)  Finished and operational distributed HVAC system for standard
office space designed and operable in accordance with ASHRAE standards and
Tenant's final floor plans, excluding basement space. This shall include all
mechanical equipment, duct work distribution and thermostatic controls. Any HVAC
equipment required in addition to the standard HVAC system serving the Building
shall be at Tenant's sole expense. The HVAC system will be controlled by a
thermostat covering each of the eight (8) separately zoned areas on each floor.
The thermostats will be located in close proximity to that building area which
the thermostat controls.

         (8)  Emergency lighting in fire stairs, hand fire extinguishers and
fire hose cabinets adjacent to the fire stairs on each floor and any other fire
and emergency equipment required by local, state and federal authorities
applicable to standard office space.

     (B)  In addition to performing the above stated work, Landlord shall 
provide Tenant with an allowance of $6.00 per net rentable square foot leased, 
excluding any basement areas, which will be a total of $318,276. Said lump sum 
amount can be used by Tenant in any manner it so chooses, including the 
purchase of movable partitions and furniture. Tenant and Landlord hereby agree 
that Landlord will control such funds, and will make disbursements therefrom 
upon written request by Tenant.

     (C)  All such work performed by Landlord on Tenant's behalf shall be done 
as shown on and to the extent required by Tenant's interior layout plans 
attached hereto as Exhibits A-3, A-4, A-5, A-6 and A-7.

                                    Page 35
   44
Landlord will certify that the Building structural design recognizes and 
accommodates the weight of Tenant's furniture and equipment as shown on 
Tenant's floor plans.

     Within fifteen (15) business days after execution of this lease, Tenant 
shall notify Landlord of Tenant's approval for Landlord to proceed with 
Tenant's Work or notify Landlord of any changes Tenant desires to make. 
Landlord shall perform the rest of Tenant's Work in accordance with the terms 
of this lease. If Tenant shall have failed to respond to Landlord's price 
within said period, Tenant shall be deemed to have approved same.

     Any changes in Tenant's Work proposed by Tenant subsequent to the 
submission and approval of Tenant's plans shall, to the extent possible, be 
priced based upon the unit price schedule attached hereto as Exhibit C and made 
a part hereof and be subject to Landlord's approval, which approval Landlord 
agrees not to unreasonably withhold or delay. It is understood between the 
parties that the unit prices shown on Exhibit C are valid through August 1, 
1980. If, subsequent to the submission and approval of Tenant's plans and the 
determination of Landlord's price, Tenant requests a change in Tenant's Work, 
and such change, in Landlord's opinion, shall increase the overall cost to 
Landlord of performing Tenant's Work, and if Landlord shall so notify Tenant 
prior to taking action with respect to any such change, Landlord may predicate 
its making of such change upon the adjustment of Landlord's price to reflect 
any increased cost to Landlord of such change. If Tenant requests a change in 
Tenant's Work after such submission, approval and determination, which change 
shall decrease the overall cost to Landlord of performing Tenant's Work, Tenant 
may request an adjustment of Landlord's overall price to reflect any such 
decrease.

     (E)  If Landlord's price shall exceed Tenant's allowance as determined by 
Subparagraph (B) above, Tenant shall pay to Landlord the amount of such excess 
within twenty (20) days after Tenant occupies the Premises upon receipt of 
Landlord's invoice itemizing any excesses. Any amounts not paid within said 
twenty (20) days shall bear interest at the rate of 1 1/2% percent per month. 
If Landlord's prices shall be less than Tenant's allowance as determined by 
Subparagraph (B) above, Tenant shall receive a rent credit equal to the amount 
of any difference between Landlord's overall price and Tenant's allowance as a 
reduction in Tenant's first and succeeding monthly rent payment until the 
credit has been exhausted.


                                    Page 36

   45
     (F)  During the construction of the Building and the performance of
Tenant's Work in the Premises, Tenant, its agents and employees shall be
afforded reasonable access and entry to the Building and Premises at all
reasonable hours for the purpose of inspecting and verifying construction of the
Building and Premises as herein provided and the performance of Tenant's Work
and all other work in the Premises required by Exhibits A-3, A-4, A-5, A-6 and
A-7, provided, however, that such access and entry does not unreasonably
interfere with the performance of such construction or other work.

     (G)  Landlord at its expense shall obtain all necessary governmental
permits and certificates for the commencement and prosecution of Tenant's Work
and for final approval thereof upon completion, and shall cause Tenant's Work to
be performed in compliance therewith and with all applicable laws and
requirements of state and local public authorities, and in good and workmanlike
manner; provided, however, that Landlord and Tenant shall cooperate reasonably
and expeditiously in making reasonable changes in Tenant's plans necessary to
obtain such permits, certificates and approval.

     (H)  Landlord hereby warrants the work performed by its contractors and
 subcontractors for a period of one (1) year from the date of the occupancy of
 the Premises by Tenant against defects in workmanship and materials in the
 construction of the Building and Premises. During the period of this warranty,
 the Landlord agrees to promptly repair or make good, without cost to Tenant,
 any and all such defects in workmanship and materials upon receipt of notice
 thereof from Tenant. Further, Landlord hereby agrees to name Tenant as its
 joint beneficiary, as their interest may appear, on any warranty in excess of
 said one (1) year period, received by it from its contractor or subcontractors
 with respect to individual trade bonds, warranties, or guarantees specified
 under the various trade sections of the specifications. The foregoing covenant
 shall in no wise affect or limit Landlord's obligations to make repairs as
 elsewhere provided in this Lease to Tenant.

                                    Page 37
   46

34.  INVERNESS COUNTRY CLUB

     Landlord agrees to provide Tenant, at no cost to Tenant, fifteen (15) 
individual dining privileges at the Inverness Country Club for the purpose of 
utilizing the club's dining facilities. Said dining privileges shall be 
provided by Landlord from the date of Tenant's occupancy of the Premises to the 
expiration date of the initial term of this Lease. Tenant shall furnish to 
Landlord continuously updated lists of the 15 individuals and their positions 
with Combustion Engineering to whom these privileges pertain.

     If Landlord continues to own the Inverness Country Club after the initial 
term of this Lease, and if, in Tenant's reasonable judgment there are no eating 
facilities comparable to the Inverness Country Club within two (2) miles of the 
Building, then Landlord will continue to provide Tenant with fifteen (15) 
dining privileges at the Inverness Country Club, at no cost to Tenant. The 
fifteen (15) dining privileges will continue to be provided until Landlord 
sells the Country Club or until comparable dining facilities are opened within 
(2) miles of the Building in Tenant's reasonable judgment.

     In the event that comparable eating facilities are available within two 
miles of the Building, after the initial five year term of this Lease, then 
Tenant may, at Tenant's option and expense, continue the use of fifteen (15) 
dining privileges at the Inverness Country Club for any extended lease term.


35.  OPTION FOR ADDITIONAL SPACE

     (A)  Landlord hereby grants Tenant the option to acquire additional office 
space on Floors 1, 2, and 3 of the Building, in accordance with the following 
schedule:

          (1)  Landlord agrees to limit all leases on the third floor and
          approximately one-half of the contiguous space on the second floor of
          the Building to a maximum lease term of three (3) years. Tenant will
          have the option to acquire all the office space on the third floor and
          approximately one-half of the second floor as the initial lease(s)
          expire. In any event all space on the third floor and approximately
          one-half of


                                    Page 38
   47
          the second floor will be made available no later than January 1, 1984.

          (2)  Landlord agrees to limit all leases on the first floor and 
          approximately one-half of the second floor of the Building to a 
          maximum lease term of five (5) years. Tenant will have the option to 
          acquire all the office space on the first and approximately one-half 
          of the second floor of the Building as the initial leases expire. In 
          any event all space on the first and second floors will be made 
          available to Tenant no later than January 1, 1986.

               Landlord will furnish Tenant a continuously updated list, as 
          leases are made for space on the first, second and third floors of 
          the Building. The list shall include the amount of the square feet 
          under lease, the location of the space drawn on a 1/8" scale typical 
          Building floor plan, the lease expiration date and the space 
          presently vacant in the Building. Tenant shall advise Landlord in 
          writing no later than six (6) months in advance of each lease 
          expiration date of its intent to acquire any space or within ten (10) 
          days of the date space becomes vacant for any other reason. Any space 
          so acquired by Tenant shall be subject to all the same terms and 
          conditions of this lease including termination date except as 
          provided herein.

          (B)  In addition to the options for additional space granted to
Tenant, as stated herein, Tenant shall have the right to lease any unleased
space in the Building and to lease any leased space that becomes vacant for any
reason from time to time on the same terms and conditions as contained in
sections (D) and (E) of this Article 35. Landlord shall inform Tenant monthly of
the status of any negotiations concerning unleased or vacant space and Tenant
shall inform Landlord within a reasonable time thereafter of Tenant's desire to
acquire any of said vacant or unleased space. At the request of Tenant, Landlord
shall lease to Tenant any vacant space available


                                    Page 39
   48
unless Landlord has made a binding commitment to lease the requested space to a 
third party. 

     (C)  If Tenant does not acquire all the space in the Building as provided 
for herein, Landlord may re-lease any space not acquired for a maximum term of 
five (5) years. Tenant shall have the option to acquire any remaining space in 
the building at the expiration of the said five (5) year lease term in the same 
manner as provided herein. 

     (D)  The rental schedule for all expansion space acquired in accordance 
with this Article 35 shall be as follows:


          (1)  The rental rate for all space acquired on the third floor will 
               be at $9.25 per net rentable square foot per year plus 
               accumulated escalations as determined by Article 4. 

          (2)  The rental rate for all space acquired on the first floor and 
               second floor prior to the end of the initial lease term of five 
               (5) years and the First Option period, years 6 through 10, will 
               be at the lower of the ten current market rate for said space 
               based on the rental rates for comparable space in Inverness 
               Center, (hereinafter referred to as "Market Rate"), or an 
               increase of 10% over the base rental rate then in effect for 
               Tenant's fourth, fifth, and sixth floor space, plus accumulated 
               escalation as determined by Article 4. The rental rate for said 
               space acquired during the Second Option Period, or lease years 
               11-15, shall be at the lower of the Market Rate or 20% over the 
               base rental rate then in effect for Tenant's fourth, fifth and 
               sixth floor office space, plus accumulated escalation. The 
               rental rate for space acquired during the Third Option Period or 
               lease years 16-20, shall be at the lower of the Market Rate or 
               30% over the base rental then in effect for Tenant's fourth, 
               fifth and sixth floor office space, plus accumulated escalation.


                                    Page 40
              
   49

     (E)  All expansion space acquired in accordance with this Article 35 shall 
be prepared for Tenant's occupance by Landlord in accordance with the following 
schedule:
     
          (1)  If the expansion space acquired by Tenant had not been previously
          occupied by tenants, agent or Landlord, then Landlord shall prepare
          the space for Tenant's occupancy in accordance with Article 33. 

          (2)  If the expansion space acquired by Tenant had been previously
          occupied by tenants, agent or Landlord, then Landlord shall, at
          Landlord's expense, perform any demolition work required by Tenant for
          its use of the space, and Tenant shall, at Tenant's expense, perform
          any construction work relating to interior leasehold improvements
          notwithstanding the provision of Article 33 hereof.


36.  BUILDING RECEPTION AREA

     Landlord agrees that Tenant shall have the right to establish a reception 
area in the Building entrance lobby area when Tenant occupies 100 percent of 
the Building. Landlord also agrees that no other tenant shall have the right to 
use the Building entrance lobby as a reception area at any time.


37.  AGENT'S COMMISSION

     Landlord and Tenant agree that Taylor & Mathis of Alabama, Inc., acted as 
sole Agent for the purpose of this lease. It is understood that any fee due 
Agent is the responsibility of Landlord and the same shall be paid by 
Landlord.  Landlord agrees to pay Agent as compensation for Agent's services 
rendered in procuring this Lease, the first full month's rent paid hereunder 
and thereafter 5 percent (5%) of all rental paid to Lessor as rent for the 
Premises or any part thereof, whether paid under this Lease or otherwise, and 
Landlord with consent of Tenant, hereby assigns to Agent that portion of such 
rental payment constituting the aforesaid commission. If the term


                                    Page 41
   50
     of this Lease is extended or renewed, or if this Lease is amended to cover
     any other premises as an expansion of, renewal of, or substitute for, the
     Premises herein leased or any part thereof, or if a new lease is entered
     into between Landlord and Tenant covering the Premises, or any part
     thereof, or covering any other premises as an expansion of, renewal of, or
     substitute for the Premises herein leased or any part thereof, then in any
     such said events, Landlord, in consideration of Agent having procured
     Tenant hereunder, agrees to pay Agent 5 percent (5%) of all rental paid to
     Landlord under such extensions, renewals, amendments or such new lease.
     Agent agrees in the event Landlord sells Premises that upon Landlord's
     furnishing Agent with an agreement signed by Purchaser, assuming Landlord's
     obligations to Agent under this Lease, that Agent will release original
     Landlord from any further obligations to Agent hereunder. Agent is a party
     to this Lease solely for the purpose of enforcing its rights under this
     Lease, and it is understood by all parties hereto that Agent is acting
     solely in the capacity as Agent for Landlord, to whom Tenant may look as
     regards all covenants, agreements and warranties herein contained.


     38.  USUFRUCT ONLY
                     
          This contract shall create the relationship of landlord and tenant; no
     estate shall pass out of Landlord; Tenant has only a usufruct, not subject
     to levy and sale.


     39.  STATUS REPORTS

          Recognizing that Landlord may find it necessary from time to time to
     establish to third parties such as accountants, banks, mortgagees or the
     like, the then current status of performance hereunder, Tenant agrees


                                    Page 42
   51
upon the written request of Landlord, made from time to time by notice, to 
furnish promptly a written statement (in recordable form, if requested) on the 
status of any matter pertaining to this Lease to the best of the knowledge and 
belief of the Tenant making such statement. This lease and all the agreements, 
covenants and conditions contained herein shall be binding on the Landlord and 
Tenant and upon their respective successors and assigns.

IN WITNESS WHEREOF the parties hereto have set their hands and seals on the 
date and year first above written.


                                        LANDLORD

                                        METROPOLITAN LIFE INSURANCE COMPANY


/s/                                         /s/  
- ------------------------------------    ----------------------------------------
                                            By: Vice President

/s/  Judith J. Ross
- ------------------------------------


                                        ATTEST: /s/  
                                                --------------------------------
                                                By: Assistant Secretary


                                        TENANT:

                                        COMBUSTION ENGINEERING, INC.

/s/                                          /s/  R. J. Hallinan
- ------------------------------------    ----------------------------------------
                                                  By: Vice President

/s/  Patricia J. Sawyer
- ------------------------------------


                                            /s/
                                        ----------------------------------------
                                                 ATTEST: Assistant Secretary


                                        AGENT:

                                        TAYLOR & MATHIS OF ALABAMA, INC.

/s/  Carroll M. Battey                      /s/
- ------------------------------------     ---------------------------------------
                                            By: Chairman of the Board
/s/
- ------------------------------------

                                        ATTEST:

                                            /s/
                                        ----------------------------------------
                                            By: Secretary



                                    Page 43

   52
STATE OF CONNECTICUT   )

                       )  S.S.

COUNTY OF FAIRFIELD    )

         BE IT REMEMBERED THAT on this 19th day of May 1980, before me, a 
Notary Public in and for said State, personally appeared R. J. Hallinan, who 
is personally known to me and known to me to be the identical person described 
in and who executed the foregoing instrument, and such person duly acknowledged 
to me the execution of the same as a free and voluntary act and deed for the 
uses and purposes and consideration therein set forth.

         WITNESS MY HAND AND OFFICIAL SEAL OF THIS OFFICE this day and year 
above written.

                    /s/ 

                    Notary Public in and for

                    Fairfield County,



NOTARY PUBLIC
My Commission Expires March 31, 1985  (SEAL)

                     

STATE OF GEORGIA    )

                    )S.S.

COUNTY OF DEKALB    )

         BE IT REMEMBERED THAT on this 3rd day of July 1980, before me, a 
Notary Public in for said State, personally appeared ____________________,
who is personally known to me and known to me to be the identical person 
described in and who executed the foregoing instrument, and such person duly 
acknowledged to me the execution of the same as a free and voluntary act and 
deed for the uses and purposes and consideration therein set forth.

         WITNESS MY HAND AND OFFICIAL SEAL OF THIS OFFICE this day and year 
above written.

                    /s/

                    Notary Public in and for

                    DeKalb County,


Notary Public Georgia State at Large
My Commission Expires: 9-26-82  (SEAL)

                     

                                    Page 44
   53
STATE OF          )

                  ) S.S.

COUNTY OF         )

         BE IT REMEMBERED THAT on this 30th day of June 1980, before me, a 
Notary Public in and for said State, personally appeared C.M. Taylor, who is 
personally known to me and known to me to be the identical person described in 
and who executed the foregoing instrument, and such person duly acknowledged to 
me the execution of the same as a free and voluntary act and deed for the uses 
and purposes and consideration therein set forth.

         WITNESS MY HAND AND OFFICIAL SEAL OF THIS OFFICE this day and year 
above written.
                  
                    /s/ Renee H. Williams
                    ---------------------
                    Notary Public in and for


                   

                    ------------------------ County,
                           


Notary Public, Georgia State at Large
My Commission Expires July 29, 1983      (SEAL)


                  

                                    Page 45
   54
                              MEMORANDUM OF LEASE


         This is a Memorandum of that certain unrecorded Lease dated July 3, 
1980 between METROPOLITAN LIFE INSURANCE COMPANY, a New York Corporation, 
Landlord, whose address is 47 Perimeter Center East, Suite 650, Atlanta, 
Georgia 30346, and COMBUSTION ENGINEERING, INC., a Delaware Corporation, 
Tenant, whose address is Inverness Center, Building 31, Birmingham, Alabama 
35243, concerning the premises described in Exhibit A attached hereto and made 
a part and made a part hereof by reference.

         For good and valuable consideration, Landlord leases the premises, 
together with all appurtenances and easements thereto to Tenant, for the term 
and under the provisions contained in the above-mentioned unrecorded Lease, 
which unrecorded Lease is incorporated in this Memorandum by this reference. 
Tenant is also entitled to the use of parking areas and common eating facility 
area in the basement of the leased premises, all as described in said 
unrecorded Lease, for the term of the Lease.

         The term of the Lease is to commence when the demised premises are 
completed constructed and ready for occupancy, according to the terms of the 
unrecorded Lease, but no later than January 1, 1981, and will run for a term of 
five (5) years; ending no later than January 1, 1986.

         Tenant has an option and right to renew this lease for three (3) 
successive periods of five (5) years each, subject to the terms and conditions 
of the Lease.

         This Memorandum is not a complete summary of the above-mentioned 
unrecorded Lease. Provisions in this Memorandum shall not be used in 
interpreting the lease provisions. In the event of conflict between 


                                    Page 46

   55
the Memorandum and the recorded Lease, the unrecorded Lease shall control.

         IN WITNESS WHEREOF the parties hereto have set their hands and seals 
on the date and year first above written.


                                    LANDLORD:

                                    METROPOLITAN LIFE INSURANCE COMPANY

/s/                                 By: /s/ 
   ------------------------            ------------------------
                                            Vice President
/s/ Judith J. Ross
   ------------------------

                                    TENANT: COMBUSTION ENGINEERING, INC.

/s/                                 By: /s/ R.J. Hallinan
   ------------------------            ------------------------

/s/ Patricia J. Sawyer
   ------------------------ 


                                    Page 47
   56

STATE OF GEORGIA         )
                         )
COUNTY OF DEKALB         )


     I, the undersigned, a Notary Public in and for said County in said State, 
hereby certify that C.E. Sayres, whose name as Vice President of Metropolitan 
Life Insurance Company, corporation, is signed to the foregoing conveyance, and 
who is known to me, acknowledged before me on this day that, being informed of 
the contents of this Memorandum of Lease, he, as such officer and with full 
authority, executed the same voluntarily for and as the act of said corporation.

     GIVEN UNDER MY HAND AND OFFICIAL SEAL, this the 3rd day of July, 1980.

          
                                    /s/ Judith J. Ross
                                    ----------------------------------------
                                    Notary Public
                                    Notary Public Georgia State at Large
                                       My Commission Expires: 9-26-82       

                                              (SEAL)



STATE OF CONNECTICUT     )
                         )
COUNTY OF FAIRFIELD      )

     I, the undersigned, a Notary Public in and for said County in said State, 
hereby certify that R.J. Hallinan, whose name as Vice President of COMBUSTION 
ENGINEERING, INC., a corporation, is signed to the foregoing conveyance, and 
who is known to me, acknowledged before me on this day that, being informed of 
the contents of this Memorandum of Lease, he, as such officer and with full 
authority, executed the same voluntarily for and as the act of said corporation.

     GIVEN UNDER MY HAND AND OFFICIAL SEAL, this the 19th day of May, 1980.


                                    /s/ Ruth M. Storch
                                    ----------------------------------------
                                    Notary Public
                                               NOTARY PUBLIC 
                                       My Commission Expires: March 31, 1985

                                              (SEAL)
   57


                                   EXHIBIT A

The demised premises are a part of a six-story office building, being known as 
31 Inverness Center, and being located on Site 7, Inverness Office Park, which 
has a legal description as follows:

         A part of the Northwest Quarter of the Southwest Quarter of Section 
         36, Township 18 South, Range 2 West, and the Northeast Quarter of the 
         Southeast Quarter of Section 35, Township 18 South, Range 2 West, 
         being more particularly described as follows: Commence at the 
         Southwest Corner of the Northwest Quarter of the Southwest Quarter and 
         sighting North along the West line of said Quarter-Quarter Section 
         turn an angle left of 44 degrees 12 feet and run Northwesterly 354.20 
         feet; thence, turn an angle right of 78 degrees 37 feet and run 
         Northeasterly 638.56 feet; thence, turn right 30 degrees 46 feet 30 
         inches and run Northeasterly 225.67 feet; thence, turn right 90 
         degrees 42 feet and run Southeasterly 372.33 feet to the Point of 
         Beginning of the tract herein described, said point being on the 496 
         foot contour of Lake Heather; thence, an angle right of 180 degrees 
         and run Northwesterly 290.25 feet to the right-of-way of Inverness 
         Center Arterial Road; thence backsighting on last course turn an 
         interior angle right of 87 degrees 18 feet and run Southwesterly 80.69 
         feet to a point of curve to the left; running thence along said curve, 
         having a chord measuring 398.34 feet that forms an interior angle of 
         164 degrees 42 feet 30 inches, an arc distance of 403.11 feet (said 
         curve having a radius of 755.19 feet and central angle of 30 degrees 
         35 feet); thence, backsighting on last course turn an interior angle 
         right of 164 degrees 42 feet 30 inches to chord of said curve and run 
         along said southerly right-of-way in a Southwesterly direction 150.86 
         feet; thence, backsighting on last course turn an interior angle right 
         of 102 degrees 03 feet 30 inches and run Southeasterly 269.97 feet; 
         thence, backsighting on last course, turn an interior angle right of 
         141 degrees 30 feet and run Southeasterly 107.44 feet to the 496 foot 
         contour of Lake Heather; thence following the meanderings of 496 foot 
         contour to the Point of Beginning.
   58
                                                                        PAGE TWO

8.   If tenants require wiring for bell or buzz system, such wiring shall
be done by the electrician of the building only, and no outside wiring men will
be allowed to do work of this kind unless by the written permission of Landlord,
or its representatives. If telegraphic or telephonic service is desired, the
wiring for same shall be done as directed by the electrician of the building or
by some other employee of Landlord who may be instructed by the Superintendent
of the Building to supervise same, and no boring or cutting for wiring shall be
done unless approved by Landlord or its representatives, as stated. The electric
current shall be used for customary office purposes only, unless written
permission to do otherwise shall first have been obtained from Landlord, or its
representative, and at an agreed cost to tenants.

9.   The Landlord, and its agents, shall have the right to enter the Premises at
all reasonable hours for the purpose of making any repairs, alterations, or
additions which it shall deem necessary for the safety, preservation, or
improvement of said building, and the Landlord shall be allowed to take all
material into and upon said Premises that may be required to make such repairs,
improvements, and additions, or any alterations for the benefit of the Tenant
without in any way being deemed or held guilty of an eviction of the Tenant; and
the rent reserved shall in no wise abate while said repairs, alterations, or
additions are being made; and the Tenant shall not be entitled to maintain a
set-off or counterclaim for damages against the Landlord by reason of loss or
interruption to the business of the Tenant because of the prosecution of any
such work. All such repairs, decorations, additions, and improvements shall be
done during ordinary business hours, or, if any such work is at the request of
the Tenant to be done during any other hours, the Tenant shall pay for all
overtime costs. 

10.  Landlord reserves all vending rights. Requests for such service will be 
made to Landlord.

11.  The Landlord reserves the right to make such other and reasonable rules 
and regulations as in its judgment may from time to time be needed for the 
safety, care and cleanliness of the Premises, and for the preservation of good 
other therein. 
   59


                             LEASEHOLD IMPROVEMENTS
                                        
                     UNIT PRICES FOR COMBUSTION ENGINEERING



                                                        
1.   Supply and install Lessor's standard interior 9'0" 
     drywall partitions (1/2" gypsum wallboard both side 
     of 3 5/8" metal studs), painted both sides.              $  20.63/LFT*

2.   Supply and install Lessor's standard interior
     3'0" X 7'0" high pressure laminate faced solid core
     doors in painted metal frames, complete with latch
     set hardward (no closer).                                $ 353.63/ea.

3.   Supply and install Lessor's standard wall-mounted 
     duplex grounded type receptacles completely circuited
     to 120 volt panel in drywall.                            $  39.20/ea. 

4.   Supply and install Lessor's standard wall-mounted 
     telephone outlets in drywall.                            $  11.20/ea.
                                                              $   1.74/LFT for
                                                                  1" conduit.
5.   Supply and install Lessor's standard single pole
     wall-mounted silent electric switches in drywall.        $  39.20/ea.

6.   Supply and install Lessor's standard 2' X 4' four
     lamp recessed fluorescent lighting fixtures.             $  73.74/ea.

7.   Supply and install Lessor's standard J.J. Industries
     2600-Z 26 ounce carpet (direct glue-down) throughout
     the leased area.                                         $   9.25/sq.yd.

8.   Supply and install Lessor's standard entrance door,
     3'0" X 8'9 1/4" complete with closer and hardware.       $ 548.51/ea.

9.   Supply and install building standard 4" covered vinyl
     base (with tab corners).                                 $    .55/LFT

10.  Supply and install paid of Lessor's standard tenant
     entrance doors, 3'0" X 8'9 1/4", high pressure laminate
     faced (both sides), edge bound, solid core doors in
     welded metal frames complete with closer and hardware.   $ 841.27/ea.



*Price of $20.63 per lineal foot is applicable only to work completed
 by August 1, 1980.


                                  EXHIBIT "C"
   60
[TAYLOR&MATHIS LOGO]


INVERNESS
Post Office Box 43248
Birmingham, Alabama 35243-0248
(205) 991-8600
(205) 980-5266 Fax

Real Estate Development, Management and Brokerage
Atlanta - Birmingham - Miami


May 24, 1995

VIA U.S. MAIL


Mr. Thomas H. Ogiba
Director of Project Services
Asea Brown Boveri
31 Inverness Center
Fourth Floor
Birmingham, Alabama 35242

RE:  Second Agreement Amending Lease by and between Metropolitan Life Insurance
     Company, Inc., a New York Corporation ("Landlord") and Taylor & Mathis,
     Inc. ("Leasing Agent") and ABB Environmental Systems, Inc., successor in
     interest to Combustion Engineering, Inc., ("Tenant").


Dear Tom:

Enclosed please find one (1) fully executed original of the above referenced 
Second Amending Lease Agreement for ABB's space at 31 Inverness Center.

Tom, if you have any questions or need any additional information, please do 
not hesitate to call me.

Very truly yours,


/s/  R. William Pradat, Jr.
- ------------------------------------
     R. William Pradat, Jr.
     Vice President - Marketing

RWP:kn

Enclosure

   61
                        SECOND AGREEMENT AMENDING LEASE


STATE OF ALABAMA

COUNTY OF SHELBY


         THIS AGREEMENT, entered into this 28th day of April, 1995, by and 
between METROPOLITAN LIFE INSURANCE COMPANY, a New York corporation 
(hereinafter called "Landlord"); and ABB ENVIRONMENTAL SYSTEMS, INC., successor 
in interest to COMBUSTION ENGINEERING, INC. (hereinafter called "Tenant"); and 
TAYLOR & MATHIS IV, a Georgia general partnership (hereinafter called "Leasing 
Agent"):

                              W I T N E S S E T H



         WHEREAS, by Lease dated July 3, 1980, and First Agreement Amending 
Lease dated January 22, 1982, Landlord leased to Tenant certain premises 
located in Birmingham, Alabama, and more particularly known as 31 Inverness 
Center, Suite 600, Birmingham, Alabama 35242 (hereinafter called the 
"Premises"), commencing September 1, 1980, and ending September 30, 1995;

         WHEREAS, Landlord and Tenant mutually agree to modify the Lease as 
described below; and

         WHEREAS, Landlord and Tenant mutually agree to extend the Lease term; 
and

         WHEREAS, Landlord agrees to leasehold improve the Premises; and

         WHEREAS, Landlord and Tenant mutually agree to document said amendment;

         NOW THEREFORE, in consideration of the mutual promises, obligations, 
and covenants contained in said Lease, as hereby amended, the parties hereto, 
intending to be legally bound, do hereby agree as follows:

         1.  The Lease Term as stated in Article 2 of the Lease is hereby
             extended, such that the Lease shall now expire on September 30,
             2000.

         2.  Effective October 1, 1995, the upper floor monthly base rental as
             stated in Paragraph 4 of the Lease shall be $49,849.12, which is
             $598,189.44 per annum.
   62
3.       Landlord shall provide a leasehold improvement allowance of
         $2000,000.00 to leasehold improve the Premises. Any cost of
         construction and design in excess of said allowance shall be paid by
         Tenant to Landlord in one (1) payment which shall be due within thirty
         (30) days of receipt of Landlord's invoice.


4.       Provided (1) Tenant is not then in default, and provided that Tenant
         has paid all sums due in a timely manner in strict accordance with the
         terms and provisions of this Lease, and provided Tenant has not
         assigned or sublet all or any portion of the Premises, and provided
         that it is in the interest of Landlord at the time to negotiate with
         Tenant for an extension of the Term, then, Tenant shall have the right
         to extend this Lease (hereinafter the "Extension Right"), commencing
         immediately upon the expiration of the initial Term of the Lease. Said
         Extension Right shall be subject further to the following conditions.


                  (i) Tenant shall notify Landlord no earlier than nine (9)
                  months prior to the expiration of the initial Lease Term that
                  it desires to negotiate a rental rate for the Extension Term.


                  (ii) The rental rate for the Extension Term shall be the
                  mutually acceptable rental rate to be negotiated between the
                  parties at that time, which rate shall be determined prior to
                  the exercise of the Extension Right pursuant to (iii) below.
                  If the parties are unable to agree upon the rate prior to the
                  date by which the Extension Right must be exercised, the
                  Extension Right shall thereby be declared null and void and of
                  no further force or effect. 


                  (iii) Tenant shall have exercised its Extension Right by
                  providing Landlord with written notice at least one hundred
                  eighty (180) days prior to the expiration of the Term.


                  (iv) All other terms, covenants and provisions of the Lease
                  shall continue in full force and effect during the Extension
                  Term of the Lease.  


This Lease is hereby amended, ratified, confirmed and continued in all respects
except for those items stated above and all such covenants, terms and conditions
of the Lease are hereby incorporated by this reference.                  
   63
         IN WITNESS WHEREOF, this agreement is executed as of the date above 
written.

Signed, sealed and delivered in        LANDLORD: METROPOLITAN LIFE INSURANCE
the presence of:                                 COMPANY, a New York corporation


/s/                                    By: /s/ 
- -------------------------------            ------------------------   
Witness                                    Assistant Vice President


/s/
- ------------------------------- 
Notary Public

    Notary Public, Cobb County,
    Georgia. My Commission Expires
    May 19, 1998.


Signed, sealed and delivered in        TENANT: ABB ENVIRONMENTAL SYSTEMS, INC.,
the presence of:                               DIV. OF ABB FLAKT, successor in 
                                               interest to COMBUSTION 
                                               ENGINEERING, INC.

/s/                                    By: /s/ James H. Miller
- -------------------------------            ------------------------   
Witness                                    Name:  James H. Miller
                                           Title: President


/s/                                    By: /s/ Thomas E. Liggett
- -------------------------------            ------------------------   
Notary Public                              Name:  Thomas E. Liggett
                                           Title: Secretary

MY COMMISSION EXPIRES AUGUST 9, 1997


                                        LEASING
Signed, sealed and delivered in         AGENT: TAYLOR & MATHIS IV, a Georgia
the presence of:                               general partnership

/s/                                    By: /s/
- -------------------------------            ------------------------   
Witness

/s/ 
- -------------------------------          
Notary Public

Notary Public, Dekalb County, Georgia
My Commission Expires September 28, 1996
   64
                         THIRD AGREEMENT AMENDING LEASE


STATE OF ALABAMA   
                 
COUNTY OF SHELBY


         THIS AGREEMENT, entered into this 26th day of June, 1996, by and 
between METROPOLITAN LIFE INSURANCE COMPANY, a New York corporation 
(hereinafter called "Landlord"); and ABB ENVIRONMENTAL SYSTEMS, INC., successor 
in interest to COMBUSTION ENGINEERING, INC. (hereinafter called "Tenant"); and 
TAYLOR & MATHIS IV, L.P., a Georgia limited partnership (hereinafter called 
"Leasing Agent"):


                              W I T N E S S E T H

         WHEREAS, by Lease dated July 3, 1980, and First Agreement Amending 
Lease dated January 22, 1982, and Second Agreement Amending Lease dated April 
28, 1995, Landlord leased to Tenant certain premises located in Birmingham, 
Alabama, and more particularly known as 31 Inverness Center, Suite 600, 
Birmingham, Alabama 35242 (hereinafter called the "Premises"), commencing 
September 1, 1980, and ending September 30, 2000;

         WHEREAS, the parties hereto have mutually agreed to a reduction in the 
Premises in accordance with the terms, conditions and agreements hereinafter 
set forth; and

         WHEREAS, all parties wish to document said reduction.

         NOW, THEREFORE, in consideration of the covenants contained herein, 
the parties hereto, intending to be legally bound, do hereby agree as follows:

1.       Provided Tenant has performed strictly in accordance with all terms 
hereof, and is in full compliance with all provisions contained in this 
Agreement, then, effective June 1, 1996, which date shall be referred to as the 
"Termination Date", the Premises shall be reduced by the entire area on the 
Sixth Floor of 31 Inverness Center (15,770 square feet) hereinafter referred to 
as the "Relinquished Area".

2.       Tenant agrees that on or before the Termination Date, Tenant shall 
have (i) paid the Termination Fee in accordance with Paragraph 4 below and as 
defined therein, and all rents due under the Lease through the Termination 
Date, (ii) satisfied all of its other obligations under the Lease through the 
Termination Date, and (iii) vacated and returned possession of the Relinquished 
Area to the Landlord in "broom clean" condition on or before the Termination 
Date.

3.       Effective June 1, 1996, the upper floor monthly base rental as stated 
in Paragraph 4 of the Lease shall be reduced by $14,068.52 which is $168,822.24 
per annum.

4.       In consideration of this reduction of the Premises as of the 
Termination Date, upon execution of this Third Agreement Amending Lease, Tenant 
agrees to pay Two Hundred Twenty Thousand and No/100 Dollars ($220,000.00) to 
Metropolitan Life Insurance Company, which amount shall hereinafter be referred 
to as the "Termination Fee". Tenant hereby acknowledges that Landlord has 
incurred expenses associated with its obligations under the Lease, including 
but not limited to, space planning and design fees, construction expenses, 
brokerage fees, opportunity costs with respect to the marketing of the 
Premises, and administrative expenses in connection with all of the foregoing, 
and Tenant hereby acknowledges that the Landlord will suffer damages as a 
result of this reduction in the Premises, consequently, the Termination Fee 
shall be deemed to be 

   65
as a result of this reduction in the Premises, consequently, the Termination Fee
shall be deemed to be compensation to Landlord for the damages incurred as a
result of said reduction, and the Termination Fee shall not be deemed to be a
penalty. Receipt of the Termination Fee shall be Landlord's exclusive remedy for
Tenant's reduction of the Premises. 

5.   Upon Tenant's full compliance with all provisions contained herein on or 
before the Termination Date, then, as of the Termination Date, Landlord, Tenant 
and Leasing Agent mutually release and discharge one another from, and 
acknowledge full accord, satisfaction and final settlement of any and all 
claims, demands, causes of action, liabilities, indebtedness or obligations of 
any kind or nature, whether known or unknown, whether contingent or 
speculative, which one may have against either or both of the others arising 
out of or in any way related to the Lease for the Relinquished Area, including 
without limitations, claims for future rent charges and other amounts under the 
Lease. As of the Termination Date, Landlord, Leasing Agent and Tenant shall 
have no further rights or obligations under the Lease and all obligations and 
rights thereunder shall cease and are extinguished, however, it is expressively 
agreed that Landlord and Tenant obligations under the Lease with respect to 
operating expenses of the Relinquished Area shall be reconciled and settled in 
accordance with Landlord's annual accounting of operating expenses. 
   66

                                LEASE AMENDMENT

         THIS LEASE AMENDMENT made as of this 4th day of February   , 1981, 
between METROPOLITAN LIFE INSURANCE COMPANY, a New York corporation with a 
principal place of business at One Madison Avenue, New York, New York 10010 
(hereinafter referred to as "Landlord"), COMBUSTION ENGINEERING, INC., a 
corporation of the State of Delaware, with a principal place of business at 
1000 Prospect Hill Road, Windsor, Connecticut 06095 (hereinafter referred to as 
"Tenant"), and TAYLOR & MATHIS OF ALABAMA, INC., a Georgia corporation 
(hereinafter referred to as "Agent").

         NOW THEREFORE, in accordance with Article 2 of the lease agreement 
made as of July 3, 1980, between the parties and in consideration of the 
premises and the mutual and dependent promises hereinafter set forth, the 
parties hereto do hereby agree as follows:

         1.  The date of full occupancy and rental commencement under the lease 
is September 2, 1980.
         2.  The "Commencement Date" of the lease agreement between the parties 
as defined in Article 2 of the lease shall for all purposes mean and be October 
1, 1980.
         3.  The "Termination Date" of the initial term of the lease agreement 
between the parties as defined in Article 2 of the lease shall for all purposes 
mean and be September 30, 1985.

         4.  Upon execution and delivery of this amendment it shall be deemed 
to be and shall become a part of the lease agreement as if such agreement had 
been set forth in the lease in its entirety at 
   67

the time of the original execution and delivery thereof.

         IN WITNESS WHEREOF the parties hereto have executed this instrument the
day and year first above written.

                                       LANDLORD

                                       METROPOLITAN LIFE INSURANCE COMPANY

/s/                                    /s/
- ----------------------------------     ----------------------------------------
                                       By       Assistant Vice President

/s/ JUDITH J. ROSS                    ATTEST: /s/                              
- ----------------------------------            ---------------------------------
                                              By      Assistant Secretary

                                       TENANT

                                       COMBUSTION ENGINEERING, INC.

/s/ P. J. SAWYER                       By: /s/ R. J. HALLINAN
- ----------------------------------        --------------------------------------

/s/ V. R. COLLINS                      ATTEST: /s/
- ----------------------------------            ----------------------------------
                                              By     

                                       AGENT

                                       TAYLOR & MATHIS OF ALABAMA, INC.

                                       /s/
- ----------------------------------     ----------------------------------------
                                        By

                                       ATTEST: /S/ E. H. AVERY
- ----------------------------------            ---------------------------------
                                              By: E. H. Avery, Secretary


                                      -2-
   68
         IN WITNESS WHEREOF, the parties hereto have herein set their hands and 
seals, effective as of the date first above written.

Signed, sealed and delivered         LANDLORD:  METROPOLITAN LIFE INSURANCE
by Landlord in the presence of:                 COMPANY, a New York corporation

                                             /s/
- ------------------------------           By: ------------------------------
Witness                                          J. Samuel O'Briant
                                                 Equity Investment Manager

/s/   Heather Jarvis          
- ------------------------------
Notary Public

NOTARY PUBLIC, GWINNETT COUNTY, GEORGIA
MY COMMISSION EXPIRES SEPT. 20, 1998

     (NOTARIAL SEAL)




Signed, sealed and delivered by     TENANT:  ABB ENVIRONMENTAL SYSTEMS, INC.
Tenant in the presence of:                   successor in interest to
                                             COMBUSTION ENGINEERING, INC.


/s/                                 By: /s/
- ------------------------------         --------------------------------------
Witness                             Title Senior Vice President & General Mgr.
                                         ------------------------------------
/s/
- ------------------------------
Notary Public
My Commission Expires: 5/28/97
  STATE OF TENNESSEE AT LARGE

   (NOTARIAL SEAL)                          (CORPORATE SEAL)



Signed, sealed and delivered by     LEASING AGENT: TAYLOR & MATHIS IV, L.P.,
Agent in the presence of:                          a Georgia limited partnership

/s/                                 By: /s/
- -----------------------------          --------------------------------------
Witness                                    E. H. Avery
                                           Executive Vice President - Operations

/s/
- -----------------------------
Notary Public

NOTARY PUBLIC, DEKALB COUNTY, GEORGIA
MY COMMISSION EXPIRES SEPTEMBER 28, 1998

My Commission Expires:

     (NOTARIAL SEAL)
   69

                                  EXHIBIT "B"

                             RULES AND REGULATIONS

(Which are referred to in the within Lease and made a part thereof.)

1.   The sidewalks, entry passages, corridors, halls, elevators and stairways 
shall not be obstructed by tenants, or used by them for any purpose other than 
those of ingress and egress. The floors, skylights and windows that reflect or 
admit light into any place in said building, shall not be covered or obstructed 
by tenants. The water closets and other water apparatus shall not be used for 
any other purpose than those for which they were constructed, and no sweepings, 
rubbish, or other obstructing substances shall be thrown therein.

2.  No advertisement, sign or other notice, shall be inscribed, painted or 
affixed on any part of the outside or inside of said building, except upon the 
interior door and windows permitted by Landlord, which signs, etc., shall be of 
such order, size and style, and at such places as shall be designated by 
Landlord. Interior signs on doors will be provided for tenants by Landlord, the 
cost of the signs to be paid by tenants.

3.  Nothing shall be thrown by tenants, their clerks or servants out of the 
windows or doors, or down the passages or skylights of the building. No 
rooms shall be occupied or used as sleeping or lodging apartments at any time.

4.  Tenants shall not employ any persons other than the janitors of Landlord 
(who will be provided with pass-keys into the offices) for the purpose of 
cleaning or taking charge of said premises. It is understood and agreed that 
the Landlord shall not be responsible to any tenant for any loss of property 
from rented premises, however occurring, or for any damage done to the 
furniture or other effects of any tenant by the janitor or any of its employees,
unless through negligence of Landlord.

5.  No animals, birds, bicycles or other vehicles shall be allowed in the 
offices, halls, corridors, elevators or elsewhere in the building.

6.  All tenants and occupants shall observe strict care not to leave their 
windows or doors open when it rains or snows, or while air-conditioning or 
heating systems are in operation, and, for any fault or carelessness in any of 
these respects, shall make good any injury sustained by other tenants, and to 
Landlord for damage to paint, plastering or other parts of the building 
resulting from such default or carelessness. No painting shall be done, nor 
shall that be any nailing, boring or screwing into the woodwork or plastering, 
nor shall any connection be made to the electric wires or electric fixtures, 
without the consent in writing on each occasion of Landlord or its Agent. All 
glass, locks and trimmings in or upon the doors and windows of the building 
shall be kept whole and, when any part thereof shall be broken, the same shall 
be immediately replaced or repaired and put in order under the direction and to 
the satisfaction of Landlord, or its Agent, and shall be left whole and in good 
repair. Tenants shall not injure, overload, or deface the building, the 
woodwork or the walls of the Premises, nor carry on upon the Premises any 
noisesome, noxious, noisy, or offensive business.

7.  The tenant shall not (without the Landlord's written consent) put up or 
operate any steam engine, boiler, machinery or stove upon the Premises, or 
carry on any mechanical business thereon, or use or allow to be used upon the 
Premises oil, burning fluids, camphene, gasoline, or kerosene for heating, 
warming, or lighting. No article deemed extra hazardous on account of fire and 
no explosives shall be brought into said premises. No offensive gases or 
liquids shall be permitted.
   70
COUNTY OF SHELBY

     THIS AGREEMENT, dated this 22nd day of January, 1982 between METROPOLITAN 
LIFE INSURANCE COMPANY, a New York Corporation, with a principal place of 
business at One Madison Avenue; New York, New York 10010, (hereinafter referred 
to as "Landlord") and COMBUSTION ENGINEERING, INC., a corporation of the State 
of Delaware, with a principal place of business at 1000 Prospect Hill Road; 
Windsor, Connecticut, (hereinafter referred to as "Tenant"), and TAYLOR & 
MATHIS OF ALABAMA, INC., a Georgia corporation, (Hereinafter referred to as 
"Agent").

                              W I T N E S S E T H:

     WHEREAS, by Lease dated July 3, 1980, Landlord leased to Tenant certain 
space in an office building located at 31 Inverness Center, Birmingham, 
Alabama, (hereinafter referred to as the "Lease"); and 

     WHEREAS, the parties hereto wish to amend said Lease as hereby amended;

     NOW, THEREFORE, in consideration of the mutual promises, obligations, and 
covenants contained in said Lease, the parties hereto, intending to be legally 
bound, do hereby agree as follows:

                                      (1)

     The square footage under Article 1 is increased 2,832 square feet on the 
third floor, as shown on Exhibit "A" attached, making the total area FIFTY-FIVE 
THOUSAND EIGHT HUNDRED SEVENTY-EIGHT (55,878) net rentable square feet of 
office space on floors three, four, five, and six; and THREE THOUSAND (3,000) 
usable square feet of basement space. 

                                      (2)

     Tenant agrees to pay Landlord an additional base monthly rental of TWO 
THOUSAND ONE HUNDRED EIGHTY-THREE DOLLARS ($2,183.00) plus accumulated 
escalations as determined by Article 4 of the Lease effective upon completion 
of the Tenant's work necessary to prepare the space of occupancy as indicated 
on Exhibit A attached hereto and made a part hereof. The total amended base 
rental during each year of the term of this Lease shall be FIVE HUNDRED 
TWENTY-EIGHT THOUSAND EIGHT HUNDRED SEVENTY-ONE