PURCHASE AND SALE AGREEMENT


THIS PURCHASE AND SALE AGREEMENT (this "Agreement") for the purchase and sale of
all of the  shares of Class A Common  Stock of  Enron/Dominion  Cogen  Corp.,  a
Delaware corporation (the "Company"), is made as of the 27th day of March, 1997,
by and between Enron Power Corp., a Delaware corporation ("Seller"), and Calpine
Finance Company, a Delaware corporation ("Buyer").

WHEREAS,  Seller  is the owner of 7,095  shares  of Class A Common  Stock of the
Company,  which constitutes all of the issued and outstanding  shares of Class A
Common Stock of the Company (the "Class A Common Stock"); and

WHEREAS, Seller wishes to sell all of the Class A Common Stock, and Buyer wishes
to purchase all of the Class A Common Stock, on the terms herein set forth; and

WHEREAS,  concurrently with the purchase of the Class A Common Stock pursuant to
this  Agreement,  Buyer  wishes to  purchase  the Long  Term  Debt  (hereinafter
defined)  at the  Facilities  (hereinafter  defined)  from the  lenders  thereof
pursuant  to an  Assignment  Agreement  to be entered  into among Buyer and such
lenders (the "Assignment of Notes");

NOW, THEREFORE, in consideration of the mutual promises made herein, and subject
to the conditions hereinafter set forth, the parties agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

1.1 Definitions.  The terms set forth below shall have the meanings  ascribed to
them in this Article I or in the part of this Agreement referred to below:

Administrative  Services Agreement:  means the Administrative Services Agreement
dated as of  August 1,  1995,  among  ECT,  the  Company,  EC5,  Clear  Lake and
Cogenron.

Affiliate:  means  with  respect  to an entity,  any other  entity  controlling,
controlled  by or  under  common  control  with  such  entity.  As  used in this
definition,  the term "control,"  including the correlative term  "controlling,"
"controlled  by" and "under  common  control  with"  shall mean the  possession,
direct  or  indirect,  of the power to  direct  or cause  the  direction  of the
management  or  policies  of an  entity,  whether  through  ownership  of voting
securities,  by contract or otherwise.  For the avoidance of doubt,  neither the
Company nor any of the Subsidiaries is, nor shall be deemed to be, Affiliates of
Seller.

Agreement:  as defined in the preamble.

Assignment Agreements:  as defined in Section 2.2.


                                       -1-





Assignment and Assumption Agreement:  as defined in Section 2.2.

Assignment of Notes:  as defined in the preamble.

Auditor:  as defined in Section 2.3.

Average Severance Cost: as defined in Section 5.3.4.

Base Purchase Price:  as defined in Section 2.2

Best  Efforts:  means a party's  best  efforts  in  accordance  with  reasonable
commercial practice and without the incurrence of unreasonable expense.

Business  Day:  means any day other than a Saturday,  a Sunday or a day on which
banks in Houston, Texas are authorized or required by law to be closed.

Buyer:  as defined in the preamble.

Buyer Indemnified Loss:  as defined in Section 7.1.

Buyer's Plans:  as defined in Section 5.3.4.

Bylaws:  as defined in Section 4.1.7.

Certificate of Incorporation:  as defined in Section 4.1.7.

Claim Notice:  as defined in Section 7.4.

Class A Common Stock:  as defined in the preamble.

Class B Common Stock:  as defined in Section 4.1.5.

Clear Lake: means Clear Lake Cogeneration Limited  Partnership,  a Texas limited
partnership.

Clear Lake  Facility:  the 377 megawatt  gas-fired,  combined-cycle  power plant
located in Pasadena, Texas and owned by Clear Lake.

Clear Lake O & M Agreement: the Operations and Maintenance Agreement dated as of
August 1, 1995, among EOC, the Company and Clear Lake.

Closing:  as defined in Article III.

Closing Date:  as defined in Article III.

COBRA: as defined in Section 5.3.4.

                                       -2-





Code:  means the Internal Revenue Code of 1986, as amended, or any amending or 
superseding tax laws of the United States of America.

Cogenron:  means Cogenron Inc., a Delaware corporation.

Cogen Venture:  means Cogen Technologies NJ Venture, a New Jersey joint venture.

Company:  as defined in the preamble.

Confidentiality Agreement:  as defined in Section 5.2.3.

Credit Support Obligations:  as defined in Section 5.3.1.

December 31 Balance Sheet:  as defined in Section 4.1.9.

Dominion:  means Dominion Cogen, Inc., a Virginia corporation.

Dominion Energy:  means Dominion Energy, Inc., a Virginia corporation.

Dominion Resources:  means Dominion Resources, Inc. , a Virginia corporation.

EC1:  means Enron Cogeneration One Company, a Delaware corporation.

EC3:  means Enron Cogeneration Three Company, a Delaware corporation.

EC5:  means Enron Cogeneration Five Company, a Delaware corporation.

ECT:  means Enron Capital & Trade Resources Corp., a Delaware corporation.

Effective Date:  as defined in Section 2.3.

Effective Date Balance Sheet:  as defined in Section 2.3.

EIPI:  as defined in Section 5.3.4.

Election Period:  as defined in Section 7.4.

Employee Schedule:  as defined in Section 5.3.4.

Environmental   Legal   Requirements:   means  any  and  all  applicable   Legal
Requirements  and orders,  restrictions  and  authorizations  of a  Governmental
Entity,  including the Clean Air Act, the Comprehensive  Environmental Response,
Compensation,  and Liability Act of 1980 ("CERCLA"), the Federal Water Pollution
Control  Act,  the  Occupational  Safety and Health  Act of 1970,  the  Resource
Conservation and Recovery Act of 1976 ("RCRA"), the Safe Drinking Water Act, the
Toxic  Substances  Control Act, the  Hazardous & Solid Waste  Amendments  Act of
1984, the

                                       -3-





Superfund  Amendments and  Reauthorization  Act of 1986, the Hazardous Materials
Transportation  Act,  and any similar law,  regulation,  or  requirement  of any
Governmental  Entity;  in each case as amended through and in effect on the date
hereof.

EOC:  means Enron Operations Corp., a Delaware corporation.

ERISA:  means the Employee Retirement Income Security Act of 1974, as amended.

Excluded Assets and Liabilities:  as defined in Section 2.3.

Facilities:  the Clear Lake Facility and the Texas City Facility.

Facilities Employees:  as defined in Section 5.3.4.

FERC:  means the Federal Energy Regulatory Commission.

Financial Statements:  as defined in Section 4.1.9.

GAAP:  as defined in Section 2.3.

Governmental  Entity:  means any  court,  governmental  department,  commission,
council,  board, agency or other instrumentality of the United States of America
or any state, county, municipality or local government.

Hazardous Substance:  means any substance presently listed, defined,  designated
or classified as "hazardous  substances" under CERCLA,  "hazardous wastes" under
RCRA, "hazardous materials" under the Hazardous Materials Transportation Act, or
"toxic substances" under the Toxic Substances Control Act.

HCC:  Hoechst Celanese Chemical Corporation.

HSR Act:  means the  Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976, as
amended.

Indemnity Notice:  as defined in Section 7.4.

Indemnified Party:  as defined in Section 7.4.

Indemnifying Party:  as defined in Section 7.4.

Insurance:  as defined in Section 4.1.20.

Knowledge,  when  used in the  phrases  "to  Seller's  knowledge,"  "to  Buyer's
knowledge,"  or "to its  [Seller's  or  Buyer's]  knowledge"  or "if  Seller had
knowledge"  means,  and  shall  be  limited  to,  the  actual  knowledge  of the
appropriate individuals set forth for Seller or Buyer, respectively, on Schedule
1.1(A).

                                       -4-





Legal  Requirement:  means  all  applicable  laws,  rules,  regulations,  codes,
ordinances,  permits, bylaws, variances,  orders,  conditions, and licenses of a
Governmental Entity.

Lien: means any lien, charge, mortgage, pledge, hypothecation, conditional sales
contract,  or security  interest  (other than any of the foregoing  listed on or
referenced in Schedule  4.1.10,  governmental  permits,  licenses,  consents and
approvals,  encumbrances  imposed  by  federal  or  state  securities  laws  and
restrictions  imposed by the  Certificate  of  Incorporation,  the Bylaws or the
Stockholders' Agreement).

Long Term Debt:  as defined in Section 4.2.8.

Losses:  as defined in Section 7.1.

Material  Adverse  Effect:  means any adverse effect on the business,  assets or
financial  condition of the Company or any of the Subsidiaries  that is material
in light of the business,  assets or financial  condition of the Company and the
Subsidiaries taken as a whole.

Notices:  as defined in Section 9.6.

Partnership Agreement:  as defined in Section 4.1.5.

Past Service:  as defined in Section 5.3.4.

Plans: means "employee benefit plan," as such term is defined in Section 3(3) of
ERISA, including each "multiemployer plan," as such term is described 4001(a)(3)
and Section 3(37) of ERISA, and any terminated employee benefit plan.

Prime Rate: means a rate per annum equal to the lesser of (i) a varying rate per
annum that is equal to the interest rate publicly quoted by Citibank,  N.A. from
time to time as its prime  commercial or similar  reference  interest rate, with
adjustments  in that  varying  rate to be made on the same date as any change in
that rate or (ii) the maximum rate permitted by applicable law.

Proposed Effective Date Balance Sheet:  as defined in Section 2.3.

Purchase Price:  as defined in Section 2.2.

PURPA:  as defined in Section 4.1.17.

PURPA Regulations:  as defined in Section 4.1.17.

PURPA Requirements:  as defined in Section 4.1.17.

Self-Certification Notices:  as defined in Section 4.2.7.

Seller:  as defined in the preamble.

                                       -5-





Seller Indemnified Loss:  as defined in Section 7.2.

Seller's Interest:  as defined in Section 2.3.

Severance Plan:  as defined in Section 5.3.4.

Stockholders' Agreement:  means that certain Stockholders' Agreement dated as of
June 27, 1988,  among Seller (as successor to Enron Corp.),  Dominion  Resources
and Dominion.

Subsidiaries:  EC1, EC3, Clear Lake and Cogenron.

Surety Agreement:  means the Surety Agreement dated as of June 12, 1985, between
Enron Corp.  (as  successor to  InterNorth  Inc.) and Texas  Utilities  Electric
Company.

Tax Returns:  as defined in Section 4.1.14.

Taxes:  means  all  federal,  state,  local,  Indian  nation or  foreign  taxes,
assessments  or  other  governmental  charges,  together  with any  interest  or
penalties thereon.

Texas City Facility: means the 450 megawatt gas-fired combined-cycle power plant
located in Texas City, Texas and owned by Cogenron.

Texas  Facilities:  means,  collectively,  the Clear Lake Facility and the Texas
City Facility.

Texas City O & M Agreement:  the Operations and Maintenance  Agreement (Cogenron
Inc.)  dated as of August 1, 1995,  as  amended,  among  EOC,  the  Company  and
Cogenron.

Texas Plant Sites:  means,  collectively,  the  physical  locations of the Texas
Facilities.

Third Party Claim:  as defined in Section 7.4.

UCC Guaranty  Agreement:  the Guaranty  Agreement  dated as of June 12, 1985, as
amended, between Cogenron and Union Carbide Corporation.

Unaudited Financial Statements:  as defined in Section 4.1.9.

Working Capital:  as defined in Section 2.3.

Year End Financials:  as defined in Section 4.1.9.

1.2  Terminology.  All  article,  section,  subsection,   schedule  and  exhibit
references  used  in  this  Agreement  are to this  Agreement  unless  otherwise
specified.  All schedules and exhibits  attached to this Agreement  constitute a
part of this Agreement and are incorporated  herein.  Unless the context of this
Agreement clearly requires otherwise,  (i) the singular shall include the plural
and the  plural  shall  include  the  singular  wherever  and as often as may be
appropriate, (ii) the words

                                       -6-





"includes" or "including" shall mean "including  without  limitation," and (iii)
the words "hereof,"  "herein,"  "hereunder," and similar terms in this Agreement
shall  refer to this  Agreement  as a whole and not any  particular  section  or
article in which such words appear.  Currency amounts  referenced  herein are in
United States Dollars.  References to "generally accepted accounting principles"
herein shall refer to such  principles in effect in the United States of America
as of the date of the statement to which such phrase refers.


                                   ARTICLE II
                                PURCHASE AND SALE

2.1 Purchase and Sale of Class A Common Stock. Upon the terms and subject to the
conditions of this Agreement,  at the Closing Seller will sell, assign,  convey,
transfer and deliver to Buyer free and clear of Liens,  and Buyer will  purchase
and accept from Seller, the Class A Common Stock.

2.2 Purchase Price. (A) The purchase price (the "Purchase  Price") to be paid by
Buyer  for the Class A Common  Stock  shall be an  amount  equal to  Thirty-Five
Million Four  Hundred  Twenty-Five  Thousand  Dollars  ($35,425,000)  (the "Base
Purchase  Price"),  as adjusted  pursuant to Section 2.3 and as Buyer and Seller
may otherwise agree.

         (B) Upon the terms and subject to the conditions of this Agreement,  at
the  Closing,  (i) Seller will deliver to Buyer,  and Buyer will accept,  one or
more stock  certificates  representing all of the Class A Common Stock,  against
payment  therefor by Buyer to Seller of the Base Purchase  Price, in immediately
available  funds by wire  transfer to one or more bank  accounts  designated  by
Seller,  and (ii)  Buyer or  Calpine  Corporation  will  assume  the  rights and
obligations  of Seller  and its  Affiliates  under the  agreements  set forth on
Schedule 4.1.10(C)  pursuant to the Omnibus  Assignment and Assumption  Consent,
Novation  and  Amendment  Agreements  in the  form  of  Exhibit  A  hereto  (the
"Assignment  and  Assumption  Agreements"),   and  an  agreement  regarding  the
Stockholders'  Agreement in form and substance satisfactory to Buyer and Seller,
pursuant to which Enron Corp. or Seller will assign, and Calpine  Corporation or
Buyer  will  assume,  all of Enron  Corp.'s  rights  and  obligations  under the
Stockholders'  Agreement.  In  addition,  but subject to Seller's  rights  under
Section 8.1(v) and subject to obtaining  consents to such assignments from Clear
Lake and Cogenron,  respectively,  and from the respective  holders of Long Term
Debt  secured by each of the  Facilities,  Seller  shall cause EOC to assign its
rights and  interests as operator  under the Clear Lake O & M Agreement  and the
Texas City O & M  Agreement  to  Calpine  Corporation  or one of its  Affiliates
designated by Buyer pursuant to assignment and assumption agreements in form and
substance  satisfactory  to Seller and Buyer.  The agreements  described in this
Section 2.2(B)  pursuant to which rights and  obligations are to be assigned and
assumed are collectively referred to as the "Assignment Agreements."

2.3  Determination of Purchase Price.  (A) As promptly as practicable  following
the Closing Date, but in any event within 90 days after the Closing Date,  Buyer
shall submit to Seller a proposed  balance  sheet  prepared by the Company as of
the close of business on March 31, 1997 (the "Effective  Date"), for the Company
and the  Subsidiaries,  excluding  all items  relating  to EC5 or Cogen  Venture
(including  (i) all cash  received  by EC5 or from  Cogen  Venture  in the three
months

                                       -7-





ending March 31, 1997, which is payable to Dominion pursuant to Section 2 of the
Amendment to  Reorganization  Agreement  dated as of June 30, 1991, and (ii) any
associated  account  payable  to  Dominion  or its  Affiliates  related  to cash
receipts by EC5 or from Cogen Venture which is then  outstanding  (the "Excluded
Assets  and  Liabilities"))  (the  "Proposed  Effective  Date  Balance  Sheet"),
prepared in accordance with generally accepted accounting  principles applied on
a  consistent  basis  ("GAAP")  and  otherwise  on a basis  consistent  with the
December  31  Balance  Sheet  (defined  in  Section  4.1.9(B)),   together  with
appropriate   supporting   calculations  and  documentation  setting  forth,  in
reasonable  detail, the preparation of the balance sheet. If Seller disputes the
correctness of the Proposed  Effective  Date Balance Sheet,  Seller shall notify
Buyer of its  objections in writing within 30 days after receipt of the Proposed
Effective Date Balance Sheet,  which notice shall set forth in reasonable detail
the reasons for  Seller's  objections.  If Seller  fails to deliver  such notice
within such 30-day period,  Seller shall be deemed to have accepted the Proposed
Effective Date Balance Sheet (including Buyer's calculations therein). Buyer and
Seller shall endeavor in good faith to resolve any disputed items within 30 days
after Buyer's receipt of Seller's notice of objections. If they are unable to do
so,  each party  shall have the right to refer the  dispute to Deloitte & Touche
(the "Auditor") for resolution and determination of the Proposed  Effective Date
Balance   Sheet  to  reflect  what  is  required  by  this  Section  2.3.   Such
determination by the Auditor shall be conclusive and binding on the parties. The
fees of the  Auditor  incurred in  resolving  any such  dispute  shall be shared
equally by Seller and Buyer, unless the Auditor determines that, as a whole, the
positions  taken by Buyer in the Proposed  Effective  Date  Balance  Sheet or by
Seller in its  objections  to the Proposed  Effective  Date  Balance  Sheet were
without merit, in which case the party making the unmeritorious  assertion shall
pay the  Auditor's  entire fee. The balance  sheet as of the  Effective  Date as
finally determined pursuant to this Section 2.3 (whether by failure of Seller to
deliver notice of objection,  by agreement of the parties or by determination by
the Auditor) is referred to herein as the "Effective Date Balance Sheet".

         (B) The Purchase  Price shall be calculated  as follows.  To the extent
that Working Capital (defined below) on the Effective Date Balance Sheet exceeds
Working  Capital on the December 31 Balance Sheet (the December 31 Balance Sheet
not being  adjusted  for the items  described on Schedule  4.1.9(C)),  or to the
extent  that the Company or the  Subsidiaries  have made  unscheduled  principal
payments  (i.e.,  payments  other  than  those  required  to be made  under  the
applicable amortization schedule) of Long Term Debt since December 31, 1996, the
Purchase Price shall be increased above the Base Purchase Price to the extent of
Seller's Interest (defined below) in the differences thereof. To the extent that
Working Capital on the Effective Date Balance Sheet is less than Working Capital
on the  December  31 Balance  Sheet  (the  December  31 Balance  Sheet not being
adjusted for the items described on Schedule 4.1.9(C)), the Purchase Price shall
be reduced below the Base Purchase  Price to the extent of Seller's  Interest in
the differences thereof. If the Purchase Price is greater than the Base Purchase
Price, Buyer shall pay Seller the difference  thereof.  If the Purchase Price is
less than the Base  Purchase  Price,  Seller  shall  pay  Buyer  the  difference
thereof.  All  amounts  owed for  Purchase  Price  adjustments  pursuant to this
Section 2.3 shall be netted as  appropriate  so that only one  payment  shall be
made,  all such amounts shall bear interest at the Prime Rate from and including
the Closing Date through and excluding the date of payment,  and all adjustments
shall be made without duplication.  Any payment shall be made not later than two
Business  Days after final  determination  of the  Effective  Date Balance Sheet
pursuant to this

                                       -8-





Section 2.3 in  immediately  available  funds by wire transfer to a bank account
designated by the party entitled to receive the payment.

         (C) For purposes of this Agreement, (i) "Working Capital" means current
assets  (including  without  limitation  cash  and  cash  equivalents,  accounts
receivable,   materials  and  supplies,  and  prepaid  expenses)  minus  current
liabilities  (including  without  limitation  accounts payable and other accrued
current  liabilities,  but  excluding  current  maturities  of long term  debt),
excluding  any items  related to EC5 or Cogen  Venture  (including  the Excluded
Assets and  Liabilities)  and  determined  in  accordance  with  GAAP;  and (ii)
"Seller's  Interest"  means,  with  respect to changes  in Working  Capital  and
unscheduled principal payments of Long Term Debt, 50%.

                                   ARTICLE III
                                  CLOSING DATE

The  consummation  of the purchase and sale of the Class A Common Stock shall be
held at a meeting (the  "Closing") at the offices of Vinson & Elkins,  L.L.P. at
10:00 A.M., Houston, Texas time, three Business Days after the date on which the
last condition  contained in Article VI is satisfied or waived, or at such other
time, date and place as may be mutually agreed to in writing by the parties. The
date on which the Closing  actually occurs is referred to herein as the "Closing
Date."


                                   ARTICLE IV
                         REPRESENTATIONS AND WARRANTIES

4.1  Representations  and  Warranties of Seller.  Seller hereby  represents  and
warrants to Buyer as follows:

         4.1.1  Organization  and Good  Standing.  Seller is a corporation  duly
organized and validly existing under the laws of the State of Delaware and is in
good standing under the laws of the States of Delaware and Texas.

         4.1.2 Authority of Seller. Seller has all requisite corporate power and
authority  to  enter  into  this  Agreement,   to  consummate  the  transactions
contemplated  hereby and to perform  all the terms and  conditions  hereof to be
performed by it. The  execution,  delivery and  performance of this Agreement by
Seller and the transactions contemplated hereby to be consummated by Seller have
been duly authorized by all requisite corporate action by Seller. This Agreement
has been duly  executed  and  delivered  by Seller and  constitutes  a valid and
binding  agreement of Seller  enforceable  against Seller in accordance with its
terms  subject to  applicable  bankruptcy,  insolvency  and other  similar  laws
relating to or affecting the enforcement of creditors'  rights  generally and to
general principles of equity (regardless of whether enforcement is considered in
a proceeding in equity or at law).

         4.1.3 No  Violations  With  Respect to  Seller.  Except as set forth in
Schedule  4.1.3,  the execution and delivery of this Agreement by Seller and the
consummation of the transactions contemplated hereby to be consummated by Seller
or its Affiliates do not: (i) violate or conflict with

                                       -9-





any of the provisions of the certificate of  incorporation  or bylaws of Seller;
(ii) conflict  with,  result in a breach of, or constitute a default  under,  or
accelerate or permit the acceleration of the performance required by, or require
any consent,  authorization  or approval  under any material  agreement or other
instrument to which Seller is a party or by which Seller or its  properties  are
bound;  (iii)  violate  or  conflict  in any  material  respect  with any  Legal
Requirements or any foreign law, rule,  regulation,  code,  ordinance,  material
permit or material  license;  or (iv)  constitute  an event which,  with notice,
lapse of time or both would  result in any such  material  violation,  conflict,
breach or default.

         4.1.4   Approvals  and  Consents  for  Seller.   No  filing,   consent,
authorization  or approval  under any Legal  Requirement  binding upon Seller is
required to be made or  obtained  by Seller in order to execute or deliver  this
Agreement  or to  consummate  the  transactions  contemplated  hereby by Seller,
except with respect to the filings required under the HSR Act and except for any
filings, consents, authorizations or approvals that, if not made or obtained, in
the aggregate would not have a Material Adverse Effect.

         4.1.5    Ownership.

         (A) Schedule  4.1.5 (A) sets forth all of the classes of capital  stock
of the Company,  the number of authorized shares of such classes,  the number of
issued and outstanding shares of such classes and the par value thereof.

         (B) Seller owns  beneficially and of record 7,095 shares of the Class A
Common  Stock.  All of such  shares  of  Class A Common  Stock  have  been  duly
authorized, validly issued and are fully paid and non-assessable.  Upon delivery
of and payment for the Class A Common Stock as provided  herein,  at the Closing
Buyer will  acquire good title to the Class A Common Stock free and clear of all
Liens other than Liens created by, through or under Buyer or its Affiliates.

         (C)  Except  as  provided  in  this  Agreement,   the  Bylaws  and  the
Stockholders'  Agreement, no subscription,  option,  warrant,  conversion right,
call or other agreement or commitment of any character is outstanding obligating
Seller,  the Company or (assuming  that neither  Buyer nor its  Affiliates  have
entered into any such agreement or commitment) any subsequent owner of the Class
A Common  Stock to deliver or sell any Class A Common  Stock or any  securities,
options,  rights or warrants  exchangeable  for or convertible  into the Class A
Common  Stock or any other  class of  capital  stock of the  Company.  Except as
provided in the  Stockholders'  Agreement,  there are no voting  agreements with
respect to the Class A Common Stock or other agreements restricting the right of
the owner of the  Class A Common  Stock to sell,  transfer,  grant a Lien on, or
otherwise  dispose of the Class A Common Stock,  assuming that neither Buyer nor
its Affiliates have entered into any such agreement.

         (D) Dominion owns of record 7,095 shares of Class B Common Stock of the
Company (the "Class B Common  Stock").  The Class A Common Stock and the Class B
Common Stock together constitute all of the issued and outstanding capital stock
of the Company. To Seller's knowledge,  except for the Stockholders'  Agreement,
there are no voting agreements with respect to the Class B Common Stock.

                                      -10-





         (E) The  Subsidiaries,  EC5 and  Cogen  Venture  constitute  all of the
corporations,  partnerships,  joint  ventures  and other  entities  in which the
Company  directly or  indirectly  owns an equity  interest.  The total number of
shares of authorized capital stock, and the classes and par values thereof,  and
the number of issued  and  outstanding  shares of each such  class  owned by the
Company,  of each  Subsidiary  that is a  corporation  are set forth on Schedule
4.1.5 (E). Other than as provided in this Agreement,  no  subscription,  option,
warrant,  conversion  right,  call  or  other  agreement  or  commitment  of any
character is outstanding obligating the Company, any of the Subsidiaries that is
a corporation,  or EC5 to deliver or sell any equity  interest in any Subsidiary
that is a corporation or in EC5 or any securities,  options,  rights or warrants
exchangeable  for or convertible  into any such equity  interest.  Except as set
forth on Schedule 4.1.5 (E),  neither the Company,  the Subsidiaries nor EC5 has
any  outstanding  indebtedness  for  borrowed  money  or any  other  issued  and
outstanding securities.

         (F) The Company owns a 98% limited  partner  interest in Clear Lake and
EC3 owns a 2% general partner  interest in Clear Lake. Other than as provided in
the Agreement of Limited Partnership dated January 29, 1988, between the Company
and EC3 (the "Partnership Agreement"),  there are no outstanding  subscriptions,
options, warrants or calls of any kind issued or granted by, or binding upon the
Company, EC3 or Clear Lake to purchase or otherwise acquire (whether directly or
through the purchase of any option or  convertible  security) any security of or
equity interest in Clear Lake.

         4.1.6    Company and Subsidiaries:

         (A) The Company and each of the  Subsidiaries  that is a corporation is
duly  organized,  validly  existing and in good  standing  under the laws of the
State of Delaware  and is in good  standing in the States of Delaware and Texas.
EC5 is a corporation duly organized, validly existing and in good standing under
the laws of the  State of  Delaware  and is in good  standing  in the  states of
Delaware and New Jersey. Neither the Company, any of the Subsidiaries nor EC5 is
qualified  to do business as a foreign  corporation  in any other  jurisdiction.
Neither the character of the properties now owned or leased by the Company,  the
Subsidiaries  or EC5 nor the nature of the business now conducted by any of them
require  them to be so  qualified,  except  where the failure to be so qualified
would not have a Material Adverse Effect.

         (B)  Clear  Lake is a  limited  partnership  duly  formed  and  validly
existing  under the laws of the State of Texas  and is in good  standing  in the
State of Texas.  Clear Lake is not qualified to do business as a foreign limited
partnership in any other  jurisdiction.  Neither the character of the properties
now owned or leased by Clear Lake nor the nature of the business  now  conducted
by it  requires  it to  be so  qualified,  except  where  the  failure  to be so
qualified would not have a Material Adverse Effect.

         4.1.7 No Violation With Respect to Company and Subsidiaries. Seller has
previously  furnished  Buyer with correct and complete copies of the Certificate
of Incorporation of the Company (the "Certificate of Incorporation"), the Bylaws
of the Company (the  "Bylaws"),  the  Stockholders'  Agreement,  certificates of
incorporation  and  bylaws  of  each  Subsidiary  that  is  a  corporation,  the
certificate of incorporation of EC5, the Partnership Agreement,  the certificate
of limited partnership

                                      -11-





of Clear Lake and the Amended and  Restated  Joint  Venture  Agreement  of Cogen
Venture.  Except  as set forth on  Schedule  4.1.7  hereto,  the  execution  and
delivery  hereof by Seller does not, and the performance and compliance with the
terms and  conditions  hereof  by it and the  consummation  of the  transactions
contemplated hereby by Seller or its Affiliates will not:

         (A) violate or  conflict  with any  provision  of the  certificates  of
incorporation or bylaws of the Company, the Subsidiaries, EC5, the Stockholders'
Agreement, or the Partnership Agreement;

         (B) violate or conflict  with any  provision of or, except with respect
to the HSR Act, require any material filing, consent,  authorization or approval
under any Legal Requirements binding upon the Company, the Subsidiaries or EC5;

         (C) in any  material  respect,  conflict  with,  result in a breach of,
constitute a default  under  (whether with notice or the lapse of time or both),
or  accelerate or permit the  acceleration  of the  performance  required by, or
require any consent, authorization or approval or trigger any preferential right
of purchase under (i) any mortgage,  indenture,  loan or credit agreement or any
other  material  agreement  or  instrument  evidencing  indebtedness  for  money
borrowed,  or any financing lease to which the Company, any Subsidiary or EC5 is
a party or by which  any of them is  bound or to which  any of their  respective
properties is subject or (ii) any other material lease,  contract,  agreement or
instrument  to which  any of them is a party or by which any of them is bound or
to which any of their respective properties is subject; or

         (D)  except  as set forth in  agreements  entered  into  after the date
hereof that are approved by Buyer,  result in the creation or  imposition of any
Lien upon any material asset of the Company, the Subsidiaries or EC5;

in the case of clauses  (B)  through  (D),  except for any  matters  that in the
aggregate would not have a Material Adverse Effect.

         4.1.8    No Default; Legal Requirements.  Except as set forth in 
Schedule 4.1.8 hereto:

         (A)  Neither  the  Company,  the  Subsidiaries  nor EC5 is in breach or
violation of, or in default under,  and no condition  exists that with notice or
lapse of time or both would  constitute such a default under,  (i) any mortgage,
indenture, loan or credit agreement,  evidence of indebtedness or other material
instrument  evidencing or securing  borrowed  money,  or any financing  lease to
which any of them is a party or by which any of their  respective  properties is
bound,  (ii) any  judgment,  order or  injunction  of any court or  governmental
agency  or  (iii)  any  other  agreement,  contract,  lease,  license  or  other
instrument;  except for  breaches,  violations,  defaults  and  conditions  that
individually or in the aggregate would not have a Material Adverse Effect;  and,
to Seller's  knowledge,  no such  breaches,  violations  or  defaults  have been
asserted in writing against the Company, the Subsidiaries or EC5; and

         (B) Neither the Company,  the  Subsidiaries  nor EC5 is in violation of
any  Legal  Requirement,  except  for  violations  that  individually  or in the
aggregate would not have a Material Adverse Effect.

                                      -12-





         4.1.9    Financial Statements.

         (A) Seller has delivered to Buyer the audited  financial  statements of
the Company as of December  31, 1993,  December 31, 1994,  and December 31, 1995
(the "Year End  Financials")  certified by the Auditor.  The Year End Financials
were  prepared  in  accordance  with GAAP and  present  fairly  in all  material
respects,  the financial  position,  results of  operations  and changes in cash
flows of the Company at the dates and for the periods therein indicated.

         (B)  Seller  has  also  delivered  to  Buyer  the  unaudited  financial
statements of the Company as of December 31, 1996,  including a balance sheet as
of December 31, 1996, a copy of which is attached hereto as Schedule 4.1.9(B)-1,
(the "December 31 Balance Sheet") and income and cash flow statements as of such
date (the unaudited  financial  statements  collectively  are referred to as the
"Unaudited Financial Statements," and collectively with the Year End Financials,
the "Financial  Statements").  The Unaudited Financial  Statements were prepared
from the Company's and the  Subsidiaries'  books and records in accordance  with
GAAP and,  with  respect to the  December 31 Balance  Sheet,  as adjusted by the
numbers  reflected on Schedule  4.1.9(C) hereby,  present fairly in all material
respects the financial position,  results of operations and changes in cash flow
of the  Company  and the  Subsidiaries  at the dates and for the period  therein
indicated,  except to the extent such  statements  would be affected by year end
and audit adjustments and except that such statements do not contain  footnotes.
Except as set forth on Schedule  4.1.9(B)-2 hereto,  the contingent  liabilities
described in the footnotes to the audited financial statements of the Company as
of  December  31,  1996  will  not  materially  and  adversely  differ  from the
contingent  liabilities  described in the Company's audited financial statements
as of December 31, 1995.

         (C)  Except as set forth on  Schedule  4.1.9(C),  the  Company  and the
Subsidiaries have no liabilities  exceeding $100,000 in the aggregate that would
be required to be  reflected on a balance  sheet (not  including  the  footnotes
thereto) prepared in accordance with GAAP applied on a basis consistent with the
Financial  Statements,  except for (i) liabilities  reflected on the December 31
Balance Sheet, (ii) liabilities incurred since December 31, 1996 in the ordinary
course  of  business  and  (iii)  liabilities  with  respect  to which  separate
agreements  have been entered into between Seller or its Affiliates and Buyer or
its Affiliates concurrently with the execution of this Agreement.

         (D) Since  December  31,  1996,  (i) the Company has neither  declared,
provided for nor made any dividends or  distributions to its  shareholders,  and
(ii) neither the Company nor the  Subsidiaries has (a) made any material changes
in its  accounting  methods,  or (b) sold or otherwise  disposed of any material
portion of its assets,  except for sales or  dispositions in the ordinary course
of business or pursuant to contracts listed on Schedule 4.1.10 (A).

         4.1.10  Leases;  Contracts;  Agreements and  Commitments.  (A) Schedule
4.1.10(A)  sets  forth  a  list  of the  following  written  leases,  contracts,
agreements,  and contractual commitments to which the Company, any Subsidiary or
EC5 is a party or by which any of them or their  respective  assets  are  bound,
correct and  complete  copies of which have  previously  been made  available to
Buyer:


                                      -13-





         (i) each lease, easement, right of way and license with respect to real
property  that  is  necessary  to  conduct,  in  all  material  respects,  their
respective  businesses  as they are  currently  being  conducted  and any  other
material agreement with respect to real property;

         (ii)     each lease of personal property providing for rental payments 
in excess of $50,000 per year;

         (iii) each agreement  involving $25,000 or more to contribute,  lend or
advance  funds to, or to purchase any  additional  equity  interest in any other
person;

         (iv) each agency agreement involving more than $50,000 in any one year;

         (v) each mortgage,  indenture, note, loan agreement,  pledge agreement,
security  document,   installment  obligation,   or  other  instrument,   credit
agreement,  or  reimbursement  agreement for or relating to any borrowing (other
than  short-term  borrowing in the ordinary  course of business) in an amount in
excess of $50,000;

         (vi)     each collective bargaining agreement, employment agreement or 
consulting agreement;

         (vii) each guaranty,  reimbursement  agreement,  bond,  surety,  or any
other  direct or  indirect  agreement  to pay or perform any  obligation  of any
person  or  entity  given  by the  Company,  any  Subsidiary  or EC5,  excluding
endorsements in the ordinary course of business;

         (viii)  each  agreement  that  expressly  prohibits  the  Company,  any
Subsidiary or EC5 from  competing with the  counterparty  in such a manner as to
materially  restrict the right of any of them to engage in any material business
in which any of them is now engaged;

         (ix)     each partnership, joint venture, shareholders or similar 
agreement;

         (x) each  agreement  for a  duration  of  greater  than 30 days for the
purchase  or  sale of  fuel,  electric  energy  or  capacity,  or  steam  or the
transportation  of fuel,  wheeling of power or  interconnection  agreements that
would be in effect on the Closing Date;

         (xi)   each agreement providing for the purchase or option to purchase 
all or substantially all of the assets of the Company, any Subsidiary or EC5;

         (xii)  each  material  agreement  between  Seller,  Dominion  or  their
respective Affiliates, on the one hand, and the Company, any Subsidiary, or EC5,
on the other hand,  other than  agreements  that will be terminated on or before
the Closing Date and for which the Company  will have no  liability  thereafter;
and

         (xiii) all other  agreements of a duration of greater than 90 days that
cannot be terminated without a penalty to the Company or any Subsidiary and that
have a total consideration of more than $50,000 during the primary contract term
that would be in effect on the Closing Date.

                                      -14-





         (B)  Schedule  4.1.10(B)  sets forth a list of each  agreement to which
Seller or any of its Affiliates is a party that directly  relates to the Company
and that, if the obligations thereunder are not performed, could have a Material
Adverse Effect.

         (C)  Schedule  4.1.10(C)  sets  forth  a  list  of  certain  contracts,
agreements,  or contractual  commitments to which Seller or its Affiliates are a
party and the rights and  obligations  under which  Buyer or Buyer's  Affiliates
will assume  pursuant  to the  Assignment  Agreements.  Except as  disclosed  on
Schedule 4.1.10(C), Seller and such Affiliates are not in default under any such
agreement or commitment,  except where such defaults in the aggregate  would not
have a Material  Adverse Effect or, with respect to obligations of Seller or its
Affiliates  under such  contracts,  agreements or  commitments  to be assumed by
Buyer or its Affiliates that provide equity support in respect of the Company or
the  Subsidiaries,  that  would  not  have  a  material  adverse  effect  on the
obligations  of  Buyer  and its  Affiliates  as  successors  to  Seller  and its
Affiliates  under  such  contracts,   agreements  or  commitments.   Except  for
agreements to be assumed pursuant to the Assignment  Agreements,  Buyer will not
assume any liabilities or obligations of Seller or its Affiliates.

         4.1.11  Litigation.  Schedule  4.1.11 sets forth a list of all lawsuits
and  administrative   proceedings  pending  or,  to  the  knowledge  of  Seller,
threatened against the Company, any Subsidiary or EC5. Schedule 4.1.11 also sets
forth a list of all lawsuits and administrative  proceedings  pending, or to the
knowledge of Seller,  threatened  against Seller or its Affiliates that directly
relate to the Company,  any Subsidiary or EC5. To Seller's knowledge,  there are
no material  investigations  by any  Governmental  Entity  pending or threatened
against the Company, any Subsidiary or EC5.

         4.1.12  Government  Permits.  Each of the Company and the  Subsidiaries
have all permits,  licenses,  consents and approvals from Governmental  Entities
required  to be  obtained  by any of them that are  necessary  to conduct  their
business  in  accordance  with  Legal  Requirements  as  it is  currently  being
conducted,  except  where the  failure  to have same  would not have a  Material
Adverse Effect.

         4.1.13 Employee Benefits. Each of the Company, the Subsidiaries and EC5
(i) is not,  and has  never  been  treated  as being a "single  employer"  under
Section  414 of  the  Code  with  any  other  Person  which  has  maintained  or
contributed to or had any liability (contingent or otherwise) to, under or based
upon any Plan, (ii) does not have, and never has had, any "employees" as defined
in  Section  3(6) of ERISA,  and  (iii)  does  not,  and has  never  maintained,
contributed to or had any liability (contingent or otherwise) to, under or based
upon any Plan,  including Plans maintained by any member of a "controlled group"
(as  defined  in Section  414 of the Code) or any plan that is a  "multiemployer
plan" (as defined in ERISA).

         4.1.14   Tax Matters.  Except as set forth in Schedule 4.1.14:

         (i)(a) All returns and reports  ("Tax  Returns")  of or with respect to
any and all Taxes which are  required to be filed on or before the Closing  Date
(taking  into  account any  extensions  permitted  under  Section  5.3.2) by the
Company  and the  Subsidiaries  have been duly and  timely  filed  (taking  into
account any extensions permitted under Section 5.3.2);


                                      -15-





         (b) All Taxes which have become due by the Company or the  Subsidiaries
(taking into account any extensions  permitted under Section 5.3.2) with respect
to the  period  covered by each such Tax Return  have been  timely  paid in full
(taking into account any extensions permitted under Section 5.3.2); and

         (ii) There is no  pending  written  claim  against  the  Company or the
Subsidiaries  for  any  Taxes  that  are  due and  payable,  and no  assessment,
deficiency or adjustment has been asserted or, to Seller's  knowledge,  proposed
with respect to any Tax Return of the Company or the Subsidiaries.  There are no
audits or investigations  pending or, to Seller's knowledge,  threatened against
the Company or the Subsidiaries.

         4.1.15  Real  Property.   Schedule   4.1.15  hereto  sets  forth  legal
descriptions  of the  Facilities  as they  appear  in the  leases  with  respect
thereto.  Neither the Company nor any  Subsidiary  owns fee simple  title to any
real  property.  To  Seller's  knowledge,  such  legal  descriptions  accurately
describe,  in all material  respects,  the real property on which the Clear Lake
Facility and the Texas City Facility are located.

         4.1.16  Environmental  Matters.  Except as set forth on Schedule 4.1.16
hereto and except where any of the following  would not have a Material  Adverse
Effect,  (i) neither the Company nor the  Subsidiaries  are in  violation of any
Environmental  Legal Requirement as a result of the operation of the business by
the Company or the Subsidiaries, (ii) no Hazardous Substances are present on, at
or under the Texas Plant Sites as a result of the  operation  of the business by
the Company or the Subsidiaries in quantities, concentrations, or locations that
require remedial action by any of them under  Environmental  Legal Requirements,
and, to Seller's knowledge,  no such Hazardous  Substances are present on, at or
under the Texas Plant Sites as a result of any other  source or cause that would
require such remedial action,  (iii) neither Seller nor the Company has received
any  written  notice,  demand  letter,  or  request  for  information  from  any
Governmental  Entity or any third party  indicating that Seller,  the Company or
the  Subsidiaries may be in violation of, or liable under,  Environmental  Legal
Requirements,  which  matter has not been finally  resolved or settled,  (iv) no
Hazardous  Substance has been disposed of or transported from the business while
owned or operated by the Company or the  Subsidiaries  except as permitted under
applicable  Environmental Legal Requirements or has been released on or from the
business by the Company or the Subsidiaries or the Texas Plant Sites while owned
or operated by the Company or the Subsidiaries which requires  remediation under
applicable Environmental Legal Requirements,  and (v) there has been no exposure
of any  person or  property  to  Hazardous  Substances  in  connection  with the
business by the Company or the Subsidiaries,  which exposure has (i) resulted in
a material  claim  against the Company or the  Subsidiaries  or (ii) to Seller's
knowledge,  would be the basis for such a claim. This Section 4.1.16 is intended
to, and shall be, the sole  representation  and warranty in this  Agreement with
respect to  environmental  matters and no other  representation  and warranty in
this Agreement shall be construed as covering any environmental matters.

         4.1.17   Regulatory Matters.

         (A) Neither  Seller,  the Company,  nor any of the  Subsidiaries  is an
"investment  company" within the meaning of the Investment  Company Act of 1940,
as amended.

                                      -16-





         (B) Each of the Seller, the Company and the Subsidiaries is not subject
to, or is exempt from regulation as, an "electric utility  company",  a "holding
company," a "subsidiary  company" of a "holding  company," an  "affiliate"  of a
"holding  company," or an  "affiliate"  of a "subsidiary  company" of a "holding
company," in each case as such terms are defined in the Public  Utility  Holding
Company Act of 1935, as amended.

         (C) Each of the Facilities is a "qualifying  cogeneration facility," as
such term is defined in the Federal Power Act, as amended by the Public  Utility
Regulatory  Policies Act of 1978  ("PURPA"),  the regulations of FERC thereunder
("PURPA  Regulations"),  and the current  interpretations  of FERC and courts of
competent jurisdiction of PURPA and such regulations  (collectively,  PURPA, the
regulations and all such interpretations, the "PURPA Requirements").

         4.1.18 Sole  Purpose;  Nature of Business.  Neither the Company nor any
Subsidiary  has  conducted or is  conducting  any business  other than  business
relating to the development,  financing, acquisition,  construction,  ownership,
operation and maintenance of the Facilities and the sale of energy produced from
the Facilities.

         4.1.19  Brokerage or Finders Fees.  All  negotiations  relating to this
Agreement and the transactions  contemplated  hereby have been conducted without
the  intervention  of any  person or entity  acting  on  behalf of  Seller,  its
Affiliates  or the  Company  in such a manner as to give  rise to a valid  claim
against  Buyer,  the  Company or any  Subsidiary  for any  broker's  or finder's
commission, fee or similar compensation.

         4.1.20  Insurance.  Set  forth on  Schedule  4.1.20  is a  correct  and
complete  list of all  operating  insurance  applicable  to the  Facilities  and
maintained  on behalf of the Company  and the  Subsidiaries  (the  "Insurance"),
listing  the types of  coverages,  amounts of  coverage  and  deductibles.  Such
insurance  is in full force and effect and  complies in all  materials  respects
with  all  material  requirements  of all  material  agreements  binding  on the
Company,  either  Subsidiary  or EOC,  as  operator  under  the  Clear  Lake O&M
Agreement and the Texas City O&M Agreement.

         4.1.21 Material Assets and Properties. Except for assets and properties
listed on Schedule 4.1.21 hereto, and except for assets and properties  provided
pursuant to the Administrative Services Agreement, each of the Subsidiaries owns
or otherwise has the right to use the assets and properties reasonably necessary
to conduct their respective  businesses as they are now conducted;  except where
the failure to have same would not have a Material Adverse Effect.

4.2      Representations and Warranties of Buyer.  Buyer hereby represents and 
warrants to Seller as follows:

         4.2.1    Organization and Good Standing.  Buyer is a corporation duly 
organized, validly existing and in good standing under the laws of the State of 
Delaware.

         4.2.2 Authority of Buyer.  Buyer has all requisite  corporate power and
authority  to  enter  into  this  Agreement,   to  consummate  the  transactions
contemplated  hereby and to perform  all the terms and  conditions  hereof to be
performed by it. The execution, delivery and performance of this

                                      -17-





Agreement by Buyer and the transactions contemplated hereby to be consummated by
Buyer have been duly authorized by all requisite corporate action by Buyer. This
Agreement has been duly executed and delivered by Buyer and  constitutes a valid
and binding agreement of Buyer enforceable  against Buyer in accordance with its
terms  subject to  applicable  bankruptcy,  insolvency  and other  similar  laws
relating to or affecting the enforcement of creditors'  rights  generally and to
general principles of equity (regardless of whether enforcement is considered in
a proceeding in equity or at law).

         4.2.3 No  Violations.  The execution and delivery of this  Agreement by
Buyer  and  the  consummation  of the  transactions  contemplated  hereby  to be
consummated  by Buyer do not and will not:  (i) violate or conflict  with any of
the provisions of the certificate of incorporation  or bylaws of Buyer;  (ii) in
any  material  respect  conflict  with,  result in a breach of, or  constitute a
default  under,  or accelerate  or permit the  acceleration  of the  performance
required  by, or  require  any  consent,  authorization  or  approval  under any
material  agreement  or other  instrument  to which Buyer is a party or by which
Buyer or its  properties  are bound;  (iii)  violate or conflict in any material
respect with any Legal Requirements or any foreign law, rule, regulation,  code,
ordinance,  material  permit or material  license;  or (iv)  constitute an event
which,  with  notice,  lapse of time or both would  result in any such  material
violation, conflict, breach or default.

         4.2.4   Approvals   and   Consents.   No  material   filing,   consent,
authorization  or approval  under any Legal  Requirement  binding  upon Buyer is
required  to be made or  obtained  by Buyer in order to execute or deliver  this
Agreement or to consummate  the  transactions  contemplated  by hereby by Buyer,
except with respect to the filings required under the HSR Act.

         4.2.5 Acquisition as Investment.  Buyer is acquiring the Class A Common
Stock for its own account as an investment  without the present  intent to sell,
transfer or otherwise distribute the Class A Common Stock to any other person or
entity.

         4.2.6  Brokerage or Finders  Fees.  All  negotiations  relating to this
Agreement and the transactions  contemplated  hereby have been conducted without
the  intervention  of any  person  or  entity  acting  on behalf of Buyer or its
Affiliates in such a manner as to give rise to a valid claim against Seller, the
Company or any  Subsidiary  for any  broker's  or  finder's  commission,  fee or
similar compensation.

         4.2.7 No Electric Utility Ownership.  Assuming Seller's  representation
in Section 4.1.17(C) is accurate,  Buyer is not (i) an "electric  utility" or an
"electric  utility holding company" or a wholly or partially owned subsidiary of
either,  within the meaning of Part 292 of the PURPA Regulations (18 C.F.R. Part
292) and FERC's decisions thereunder or (ii) otherwise engaged in the generation
or sale of electric power (other than electric  power solely from  "cogeneration
facilities" or "small power production  facilities"  (both within the meaning of
Part 292 of the PURPA Regulations or the current interpretations of FERC and the
courts of competent jurisdiction of such regulation)). At or before the Closing,
Buyer will have ratified all written  agreements between Clear Lake or Cogenron,
on the one hand, and Buyer, Seller, DRI or their respective  Affiliates,  on the
other.  Within 30 days after the  Closing  Date,  Buyer will have caused each of
Clear Lake and Cogenron to file a notice of  self-certification  ("collectively,
the "Self-Certification Notices"), the purpose of which is to reflect

                                      -18-





the change in  ownership  of the  Company,  which  notices  shall  describe  the
non-utility status of Calpine.

         4.2.8  Available  Funds.  Buyer  has,  and at the  Closing  will  have,
sufficient  funds  available to it to purchase the Class A Common Stock pursuant
to this  Agreement  and to purchase the existing  long-term  project debt on the
Facilities (the "Long Term Debt") pursuant to the Assignment of Notes for a cash
purchase  price  equal  to  the  outstanding  principal  balance,  plus  accrued
interest,  as of the Closing Date, which principal and interest,  as of the date
hereof, is expected to total approximately $157,000,000.

         4.2.9 Knowledgeable Buyer. Buyer (i) is represented by competent legal,
tax and financial  counsel in connection with the  negotiation,  execution,  and
delivery of this Agreement,  (ii) together with its  Affiliates,  has sufficient
knowledge and experience in owning,  managing,  and operating  power  generating
facilities  to  enable  it  to  evaluate  the  Facilities,   the  Company,  each
Subsidiary,  EC5 and Cogen Venture,  and the businesses of each of them, and the
technical, commercial,  financial, legal, regulatory, and other risks associated
with owning the Class A Common Stock,  (iii)  acknowledges that pursuant to this
Agreement it will have,  prior to the Closing Date,  performed all due diligence
that it  desires to  perform  to enable it to  evaluate  the risks and merits of
consummating  the  transactions  contemplated  hereby,  and that in  making  the
decision  to enter  into  this  Agreement  and the  Assignment  of Notes  and to
consummate  the  transactions  contemplated  hereby and  thereby,  it has relied
solely  on  the  basis  of  its  own  independent  investigation,  analysis  and
evaluation of the Company and the  Subsidiaries  and their  properties,  assets,
business,   financial   condition   and   prospects   and   upon   the   express
representations,   warranties  and  covenants  in  this  Agreement  and  in  any
certificate delivered at the Closing, and (iv) together with its Affiliates,  is
financially  capable of owning  the Class A Common  Stock and the Long Term Debt
and performing its obligations under this Agreement, the Assignment of Notes and
the  Assignment  Agreements.  Nothing  discovered  (or  which  should  have been
discovered)  by Buyer in the course of due diligence will be considered a waiver
of or will reduce Seller's rights under Article VII; provided that, prior to the
Closing,   Buyer  has   disclosed   to  Seller  any   inaccuracy   in   Seller's
representations  and warranties or any errors in or omissions from the schedules
to this  Agreement of which Buyer has knowledge,  and further  provided that the
foregoing  does not  extend  the time  period in which a claim may be made under
Article VII or affect Seller's rights under Section 7.6. Buyer acknowledges that
neither  Seller,  its  Affiliates  nor any other  person or entity  has made any
representation  or  warranty,  express  or  implied,  as to the  Company  or the
Subsidiaries  except  for those  expressly  set forth in  Section  4.1 or in any
certificate by Seller or its Affiliates delivered at the Closing.

                                    ARTICLE V
                       ADDITIONAL AGREEMENTS AND COVENANTS

5.1     Covenants of Seller.  Seller covenants and agrees with Buyer as follows:

         5.1.1  Certain  Changes.  Except as may be  permitted  hereunder  or as
otherwise  contemplated  in this  Agreement  and except as set forth on Schedule
5.1.1,  from the date hereof through the Closing Date,  without first  obtaining
the written consent of Buyer, which consent shall

                                      -19-





not be unreasonably withheld,  Seller shall, to the extent within its reasonable
control, cause the Company and the Subsidiaries not to:

         (i)  make  any  material  change  in the  conduct  of its  business  or
operations or make any change in its financial or tax  accounting  principles or
practices;

         (ii) merge into or with or consolidate with any other entity or acquire
all or substantially all of the business or assets of any corporation, person or
entity;

         (iii) make any change in their respective organizational documents;

         (iv)  purchase  any  securities  of any  corporation,  person or entity
except  for  investments  of cash and  other  funds in the  ordinary  course  of
business or issue any debt or equity securities;

         (v) mortgage, pledge or subject to any new Lien any of their respective
material  assets,  tangible or  intangible,  except  pursuant  to any  agreement
disclosed  on  Schedule  4.1.10;  or sell,  transfer  or  dispose  of all or any
material portion of their assets, except for sales, transfers or dispositions in
the ordinary course of business or other  dispositions of equipment or inventory
items that are obsolete or not of material value;

         (vi) take any action or enter into any commitment with respect to or in
contemplation of any liquidation, dissolution, recapitalization,  reorganization
or other winding up of its business or operation;

         (vii) enter into any settlement of or commence any material  pending or
threatened litigation;

         (viii)  consent to the entry of any  decree or order by a  Governmental
Entity;

         (ix)     set aside, declare or pay any dividends;

         (x) incur or guarantee any indebtedness for borrowed money in excess of
$50,000 or forgive any  indebtedness  for borrowed money or make any advances or
loans to third parties;

         (xi)     form any new subsidiaries or engage in any new businesses;

         (xii) enter into any new material  agreement or amend or terminate  any
material agreement; or

         (xiii)  provide any new (meaning not pursuant to an existing  agreement
disclosed on Schedule  4.1.10(A))  severance or other  employee  benefits to any
employee  of or  consultant  to  the  Company  or  any  Subsidiary,  except  for
extensions of existing consulting agreements on substantially the same terms.


                                      -20-





From the date hereof through the Closing Date, except as permitted  hereunder or
contemplated  hereby or as  consented  to in writing by Buyer,  Seller  will not
enter into any guarantees or other support  agreements in respect of the Company
or the Subsidiaries.  With respect to those matters set forth on Schedule 5.1.1,
Seller  shall  consult,  and shall use its Best Efforts to cause the Company and
the Subsidiaries to consult,  with Buyer with respect to any  negotiations  with
third  parties  and  any  new  agreements  or  amendments  or  modifications  to
agreements  contemplated by the matters listed on Schedule 5.1.1,  and shall use
its good faith efforts to incorporate  any revisions to agreements  requested by
Buyer in such negotiations, agreements, amendments and modifications.

         5.1.2  Operation  of  Business.  From the date hereof until the Closing
Date, except as permitted hereunder or contemplated hereby or as consented to in
writing by Buyer, Seller shall use its Best Efforts to cause the Company and the
Subsidiaries to carry on their  respective  businesses in the usual and ordinary
course  except  where the  failure  to do so would not have a  Material  Adverse
Effect,  including  the  purchase  of spare  parts  for the  Facilities  and the
performance of  maintenance,  repairs and similar  activities in accordance with
the normal current schedule  therefor,  and the payment of amounts due under the
Long  Term  Debt as and when due under  the  applicable  amortization  schedule.
Seller shall not cause EOC or ECT to change the performance of their obligations
under the Clear  Lake O & M  Agreement,  the Texas City O & M  Agreement  or the
Administrative Services Agreement.

         5.1.3  Insurance.  From the date hereof until the Closing Date,  Seller
will use its Best  Efforts to cause the Company to maintain  the  Insurance  for
itself  and  the  Subsidiaries.  Buyer  recognizes  and  acknowledges  that  the
Insurance  will  terminate  upon  the  Closing  and  that  the  Company  and the
Subsidiaries  will need to obtain new  insurance.  All insured  claims or losses
arising or occurring on or before the Closing with respect to the Company or the
Subsidiaries  shall be for the account of the Company or the Subsidiaries  under
the  insurance  policies  maintained  pursuant to the  applicable  operating and
maintenance  agreements  or credit  facilities  relating  to the Long Term Debt,
regardless  of when  such  claims  or  losses  are  reported  to the  applicable
insurance  carrier;   provided  that  with  respect  to  Insurance  constituting
liability insurance,. all such claims and losses shall be reported no later than
the first anniversary of the Closing Date.

         5.1.4  Access.   Seller  will  afford  to  Buyer  and  its   authorized
representatives,  at Buyer's sole expense, risk and cost, reasonable access from
the date hereof through the Closing Date,  during normal  business hours, to its
and the  Company's  personnel,  properties,  books and  records  relating to the
Facilities, the Company, the Subsidiaries and EC5 and will furnish to Buyer such
additional financial and operating data and other information relating to any of
them as Buyer  may  reasonably  request,  to the  extent  that such  access  and
disclosure  would not violate the terms of any  agreement to which  Seller,  the
Company,  any  Subsidiary  or EC5 is bound or any Legal  Requirement;  provided,
however,  that the  confidentiality of any data or information so acquired shall
be  maintained  by  Buyer  and  its  Affiliates  and  their  representatives  in
accordance with Section 5.2.3; and further provided that all requests for access
shall be directed  to Brad  Petzold  (713)  853-1611,  or such other  persons as
Seller may  designate  from time to time.  During said period,  Seller will also
allow Buyer such access to the  documents  within its  possession or to which it
has reasonable access relating directly to Cogen JV.


                                      -21-





         5.1.5 Antitrust Notification and Other Governmental Filings.  Seller or
its Affiliate  will, as promptly as  practicable  (and, in any event,  within 10
days after the execution  hereof) file with the Federal Trade Commission and the
Department of Justice the  notification  and report form required to be filed by
it for the transactions contemplated hereby (and shall request early termination
of the waiting period) and any supplemental  information which may be reasonably
requested in connection therewith pursuant to the HSR Act.

         5.1.6  Confidentiality.  After the  Closing  Date,  Seller  shall  not,
directly or indirectly,  use,  disclose or provide to any other person or entity
any information of a confidential or proprietary  nature concerning the business
or assets of the Company,  the  Subsidiaries or EC5 except (i) as is required in
governmental filings or judicial,  administrative or arbitration  proceedings or
by Legal Requirements, (ii) information that was or becomes in the public domain
without breach of any obligation of confidentiality by Seller or its Affiliates,
or (iii) as is  reasonably  necessary  to  enforce  its  rights  or  defend  its
obligations in connection with the Facilities.

         5.1.7 Public  Announcements.  Subject to applicable  securities  law or
stock exchange  requirements,  at all times until the Closing Date, Seller shall
promptly   advise,   and  obtain  the  approval   (which  may  not  be  withheld
unreasonably)  of, Buyer before  issuing,  or permitting  any of its  directors,
officers,  employees,  agents or investment bankers, or any of its Affiliates to
issue, any press release or other announcement with respect to this Agreement or
the transactions contemplated hereby; provided that no further approval shall be
required  for press  releases  or other  announcements  which are  substantially
similar to previously approved releases or announcements provided a copy of such
release or announcement is furnished promptly to Buyer.

         5.1.8  Transaction  Costs.  Seller shall bear and pay all of the costs,
fees  and  expenses  incurred  by it or on its  behalf  in  connection  with the
transactions contemplated by this Agreement.

         5.1.9 Noncompetition.  For a period of one year after the Closing Date,
neither Seller nor any of its  Affiliates  shall sell or enter into any contract
to sell and, upon request by Buyer,  shall  immediately  cease any activities or
attempts  to sell or enter into any  contract  to sell,  steam to Union  Carbide
Corporation  for use at its facility  adjacent to the Texas City  Facility or to
Hoechst Celanese  Corporation for use at its facility adjacent to the Clear Lake
Facility.

         5.1.10  Satisfaction of Closing  Conditions.  Seller shall use its Best
Efforts to cause  satisfaction of the conditions  precedent to Closing set forth
in  Sections  6.1.3,  6.1.7  through  6.1.10,  and,  subject to Section  8.1(v),
Sections 6.1.6 and 6.2.7 through 6.2.9.


                                      -22-





5.2      Covenants of Buyer.  Buyer covenants and agrees with Seller as follows:

         5.2.1 Antitrust  Notification and Other Governmental Filings.  Buyer or
its Affiliate will as promptly as practicable (and, in any event, within 10 days
after the  execution  hereof)  file with the Federal  Trade  Commission  and the
Department  of  Justice  the  notification  and  report  form  required  for the
transactions  contemplated  hereby (and shall request early  termination  of the
waiting  period)  and  any  supplemental  information  which  may be  reasonably
requested in connection therewith pursuant to the HSR Act.

         5.2.2 Public  Announcements.  Subject to applicable  securities  law or
stock exchange  requirements,  at all times until the Closing Date,  Buyer shall
promptly   advise,   and  obtain  the  approval   (which  may  not  be  withheld
unreasonably) of, Seller before issuing, or permitting any of Buyer's directors,
officers,  employees, agents or investment bankers, or any of Buyer's Affiliates
to issue, any press release or other announcement with respect to this Agreement
or the transactions contemplated hereby; provided that no further approval shall
be required for press releases or other  announcements  which are  substantially
similar to previously approved releases or announcements provided a copy of such
release or announcement is furnished promptly to Seller.

         5.2.3  Confidential  Information.  In the event that this  Agreement is
terminated or, if not terminated, until the Closing Date, the confidentiality of
any data or information  received by Buyer  regarding the business and assets of
the Company, Seller and their respective Affiliates shall be maintained by Buyer
and its representatives in accordance with the  Confidentiality  Agreement dated
March 10, 1997 executed by Calpine Corporation and Seller (the  "Confidentiality
Agreement").

         5.2.4  Transaction  Costs.  Buyer  shall bear and pay all of the costs,
fees  and  expenses  incurred  by it or on its  behalf  in  connection  with the
transactions contemplated by this Agreement, including the filing fees under the
HSR Act.

         5.2.5  Satisfaction  of Closing  Conditions.  Buyer  shall use its Best
Efforts to cause  satisfaction of the conditions  precedent to Closing set forth
in Sections 6.2.3, 6.2.4, and 6.2.7 through 6.2.9.

         5.2.6 Bank Account and Line of Credit.  Buyer has heretofore  delivered
to Seller a letter from Bank of Nova Scotia (the "Bank")  stating that Buyer (i)
has deposited sufficient funds in a deposit account maintained by it at the Bank
and (ii) has  sufficient  funds  available  to be drawn under the line of credit
provided by the Bank,  to complete  the purchase of the Class A Common Stock and
Long Term Debt as  contemplated  hereby.  Buyer hereby  agrees that prior to the
termination of this Agreement as permitted hereunder,  it shall not (a) withdraw
or use funds  from such  account or (b) draw down on or use funds from such line
of credit  except to purchase  the Class A Common  Stock and the Long Term Debt,
which withdrawal or use in the aggregate would reduce the total amount available
in such  account  and under such line of credit to less than the sum of the Base
Purchase  Price and the amount of the principal and interest  outstanding  under
the Long Term Debt.  From the date hereof through the Closing,  Buyer shall not,
and shall  cause its  Affiliates  not to,  take any action  that would cause the
terms and conditions to utilizing funds under such line of credit not to be

                                      -23-





satisfied.  Nothing in this Section  5.2.6 is intended to, nor shall it,  modify
Section 4.2.8 or imply that Buyer's obligations under this Agreement are subject
to financing.

         5.2.7  Certain  FERC  Matters.  At or before the  Closing,  Buyer shall
ratify all written agreements between Clear Lake and Cogenron,  on the one hand,
and Buyer, Seller, DRI or their respective  Affiliates,  on the other, and shall
furnish Seller with a valid  resolution of Buyer  evidencing such  ratification.
Within 30 days after the Closing Date, Buyer shall cause Clear Lake and Cogenron
to file the Self-Certification Notices with FERC.

5.3      Mutual Covenants.  Buyer and Seller covenant and agree as follows:

         5.3.1 Release.  Prior to the Closing,  without limiting Seller's rights
under Sections 6.2.7 through 6.2.9, and 8.1(v), Buyer and Seller shall use their
Best Efforts to have Seller and their  Affiliates  released from all obligations
under the  agreements  listed on Schedule  4.1.10(C)  (including  the agreements
listed   as  Credit   Support   Obligations   therein   (the   "Credit   Support
Obligations")). In addition, Buyer shall provide financial information and offer
to furnish  substantially  equivalent credit support obligations to the obligees
under  the  Credit  Support  Obligations  to effect  such  release  pursuant  to
agreements  that are mutually  satisfactory  to Buyer and Seller.  To the extent
that Seller and its  Affiliates  are not released from all of the Credit Support
Obligations pursuant to agreements reasonably satisfactory to Seller in form and
substance,  Buyer shall indemnify Seller and its Affiliates  pursuant to Section
7.2(B) with respect thereto.

         5.3.2 Tax Returns. Seller, in cooperation with the Company, shall cause
to be prepared and timely filed  (taking into account any  extensions  permitted
hereunder)  each income Tax Return of the Company that includes a taxable period
ending on or before the  Closing  Date which is  required  to be filed after the
Closing Date, and pursuant to Section  9.4(B),  Buyer shall provide  records and
assistance  to enable  Seller to make such  filings.  Seller  shall not cause or
permit  the  Company  to extend the  filing  date for such Tax  Returns  without
Buyer's prior written consent.

         5.3.3  Administrative  Services  Agreement.  Seller  shall cause ECT to
agree (i) to offer to the Company to amend the Administrative Services Agreement
to provide that it will  terminate on a date  designated by the Company which is
not more than 90 days after the Closing Date,  (ii) to continue to perform ECT's
duties and obligations under the  Administrative  Services Agreement through and
including such designated  termination date and (ii) upon such termination date,
to deliver and turn over to the  Company  non-proprietary  software,  electronic
data and books and records relating primarily to the Company or the Subsidiaries
and any other items as are mutually agreed upon by ECT and the Company.

         5.3.4    Employment Matters.

         (A) Facilities  Employees.  Schedule 5.3.4(A) (the "Employee Schedule")
to be attached to this  Agreement  will  contain the names of employees of Enron
International  Payroll,  Inc.  ("EIPI")  who are  engaged in the  operation  and
maintenance  of the  Facilities  (the  "Facilities  Employees"),  their  current
salaries  and work  location.  Seller  shall  deliver the  Employee  Schedule of
Facilities Employees on a confidential basis to the Manager,  Human Resources of
Buyer, no more than five

                                      -24-





business days after this Agreement is executed.  The Employee Schedule shall set
forth  substantially the same number of employees,  types and numbers of jobs at
each  Facility  and at the  Company,  current  salary  amounts and years of past
service credit as the information  previously provided to Buyer by Seller or its
Affiliates.  The  Employee  Schedule  shall show the name,  job  position,  work
location,  current  salary  and  years of past  service  credit  for each of the
Facilities Employees.  In addition,  Seller will provide Buyer on a confidential
basis  relevant  written  information  in  Seller's  possession  regarding  each
individual's work  qualifications,  training history,  and prior jobs held while
employed  by any  affiliate  of Seller.  The  average  severance  cost for these
Facilities  Employees is $25,272 (the "Average  Severance Cost").  Buyer, in its
sole  discretion,  may  make  offers  of  employment  to any  of the  Facilities
Employees. Buyer understands that offers of employment which are not at least at
the current  salary and at the same location of any  Facilities  Employee may be
declined by such employee and such  employee,  if  terminated by EIPI,  would be
entitled to a severance  benefit  under the Enron Corp.  Severance Pay Plan (the
"Severance Plan"), a copy of which Seller has provided to Buyer. With respect to
Facilities  Employees  who become  entitled  to a  severance  benefit  under the
Severance  Plan as a result of Buyer's not having made offers of  employment  to
such employees at their current salaries and at the same location,  Seller shall
be financially  responsible for the first nine Facilities Employees who are paid
a severance benefit under the Severance Plan, and Buyer shall promptly,  without
delay, upon receipt of written  notification by Seller,  pay to Seller an amount
equal to the number of such  Facilities  Employees in excess of nine, who within
90 days after the Closing, are paid a severance benefit under the Severance Plan
multiplied by the Average  Severance  Cost. If any such  Facilities  Employee is
terminated by Seller and receives severance under the Severance Plan, and within
12 months after the  termination  of the  Facilities  Employee by Seller,  Buyer
employs such  Facilities  Employee,  then Buyer shall  promptly pay to Seller an
amount equal to all or a portion of the severance benefit,  if any, paid to such
Facilities  Employee by either Seller or EIPI in connection with such employee's
termination of employment with either Seller or EIPI,  determined by multiplying
the amount of such  severance  benefit by a fraction,  the numerator of which is
the number 12 reduced by the number of full  months  that have  passed  from the
Closing Date to the employment  date, and the denominator of which is the number
12.

         (B) COBRA  Continuation  Coverage.  Seller shall be responsible for the
health care claims of any Facilities Employees that are not employed by Buyer as
of the  Closing  Date who  receive  continuation  of health  care  coverage,  as
required by the Consolidated Omnibus Budget Reconciliation Act of 1985 ("COBRA")
under medical plans by which they are covered.  Buyer shall be  responsible  for
providing health care continuation coverage, if any, as required by COBRA to any
of the Facilities Employees who are employed by Buyer as of or subsequent to the
Closing Date and who cease employment with Buyer for any reason thereafter.

         (C)  Participation  In Buyer's Plans.  Subsequent to the Closing,  upon
employment  with  Buyer,  the  Facilities  Employees  employed by Buyer shall be
eligible for  participation in all employee benefit plans (within the meaning of
Section  3(3) of ERISA)  for which  similarly  situated  employees  of Buyer are
eligible  ("Buyer's  Plans").  Under Buyer's  Plans,  the  Facilities  Employees
employed  by Buyer will be given  credit for Past  Service  (defined  below) for
purposes of determining  (i) eligibility  for  participation  in the retirement,
short or long term disability,  severance and vacation plans (including, without
limitation, eligibility for early retirement), and (ii) the duration and amount,
if any, of short or long term disability and severance benefits.  "Past Service"
means (i) service as

                                      -25-





an employee of EIPI or any of its  affiliates and (ii) service as an employee of
any other entity,  but only to the extent that such service is recognized  under
the  applicable  and similar plan of EIPI or its  Affiliates,  and is continuous
through the Closing Date.

         (D)  No  Medical  Preexisting   Condition.   No  preexisting  condition
limitations shall be applicable to Facilities  Employees employed by Buyer under
any  employee  benefit  plan  of  Buyer  provided  that,  with  respect  to each
Facilities  Employee and his or her other covered  dependents,  such  Facilities
Employee and each covered  dependent  enrolls in such plan within 30 days of the
Facilities Employee commencing  employment with Buyer; and further provided that
such  person has been  covered  under a medical  plan for the  six-month  period
preceding  the  Closing.   Additionally,  any  Facilities  Employee  or  covered
dependent  expenses applied toward  deductibles in the year in which the Closing
occurs and any  out-of-pocket  limitations under EIPI's medical and dental plans
in the year in which  the  Closing  occurs  shall be  recognized  under  Buyer's
medical and dental  plans and applied  respectively  toward any  deductibles  or
out-of-pocket limits thereunder in such year.

         (E)  Responsibility  for Claims.  Employee  benefit claims for expenses
incurred  by,  or for  services  provided  to,  Facilities  Employees  or  their
dependents  which occur prior to the date of the Closing  shall be the financial
obligation of Seller.  Employee benefit claims for expenses  incurred by, or for
services  provided to, Facilities  Employees  employed by Buyer or their covered
dependents  which  occur on or after the  Closing  Date shall be  covered  under
Buyer's  Plans.  The  amount and type of  benefits  payable in any case shall be
determined in accordance with the terms of the applicable employee benefit plan.

         (F)  Severance  Benefits.  Buyer shall cause the  Facilities  Employees
employed by Buyer to be eligible for  severance  benefits,  to be paid to such a
Facilities Employee if within one year after the Closing the Facilities Employee
either  has a  reduction  in base  pay and  elects  within  30 days  thereof  to
terminate  employment  or is  terminated  by  Buyer  for  a  reason  other  than
termination  for cause, in the sum of (i) two weeks of base pay for each year of
Past Service and additional  service,  or portion thereof,  credited with Buyer,
and (ii)  two  weeks of base pay for  each  Ten  Thousand  Dollars,  or  portion
thereof,  of annualized base pay, up to a maximum total severance  payment equal
to 52 weeks of base pay. "Termination for cause" as used in this paragraph shall
mean termination for such reasons as Buyer may reasonably determine  constitutes
cause  which is  serious  enough  to result in a  legitimate  business  need for
termination of employment instead of warning,  probation or counseling.  Failure
to meet  established  performance  expectations  shall  not be such a cause  for
termination  unless  the  Facilities  Employee  has  been  counseled  about  the
unacceptable  performance and has had an opportunity to improve  performance for
at least 30 days.


                                   ARTICLE VI
                              CONDITIONS TO CLOSING

6.1  Buyer's  Obligation  to  Close.  Buyer's  obligation  to close  under  this
Agreement is subject to the  fulfillment,  on the Closing  Date,  of each of the
following  conditions  (except to the extent  that  Buyer  shall have  hereafter
agreed in writing to waive one or more of such conditions):


                                      -26-





         6.1.1  Compliance  with  Agreement.  Seller  shall have  performed  and
complied in all material respects with all covenants  required by this Agreement
to be performed or complied with by it on or prior to the Closing.

         6.1.2   Representations   and  Warranties.   The   representations  and
warranties of Seller  contained in this  Agreement  shall be true and correct in
all material respects at and as of the Closing.

         6.1.3  Certificate.   Seller  shall  have  delivered  to  Buyer  (i)  a
certificate,  dated the Closing Date, executed on its behalf by its president or
a  vice  president,  certifying  true  and  correct  copies  of  each  contract,
agreement,  commitment,  instrument  or other  document  described  on Schedules
4.1.10(A),  4.1.10(B), and 4.1.10(C), and (ii) a certificate,  dated the Closing
Date, executed on its behalf by its president or a vice president, to the effect
that the conditions in Sections  6.1.1 and 6.1.2 are  satisfied,  except for any
exceptions noted in such  certificate.  If any of Buyer's  conditions to Closing
have not been satisfied,  but Buyer nonetheless  waives the satisfaction of such
condition,  Buyer shall not be entitled to any decrease in the Purchase Price or
any recourse, including indemnification under Section 7.1, against Seller or its
Affiliates with respect to the matter so waived.

         6.1.4 Filings.  Any  applicable  waiting period under the HSR Act shall
have expired.

         6.1.5  Litigation.  (i) There  shall not be pending any  litigation  or
proceeding  (filed by a person or entity other than Buyer or its  Affiliates) to
restrain or prohibit  the  transactions  contemplated  by this  Agreement  or to
obtain  material  damages  or  other  material  relief  in  connection  with the
consummation of such transactions.

         6.1.6 Stock  Certificates;  Assignment  Agreements.  Seller  shall have
delivered  to Buyer (i) one or more stock  certificates  evidencing  the Class A
Common Stock,  with stock powers duly executed in blank, and (ii) the Assignment
Agreements,  duly executed by Seller and its  Affiliates (to the extent they are
parties thereto) and all necessary consents thereto shall have been obtained.

         6.1.7  Opinion.  Seller  shall  have  delivered  to  Buyer  one or more
opinions  of  internal  counsel of Seller or its  Affiliates  (i)  covering  due
authorization,   execution  and  delivery  by  Seller  and  its  Affiliates,  as
applicable,    of   this   Agreement,    any   separate    agreements   executed
contemporaneously  herewith  between  Seller or its  Affiliates and Buyer or its
Affiliates  (including  the  Guaranty  by Enron Corp.  of  Seller's  obligations
hereunder  in favor of  Buyer)  and the  Assignment  Agreements  and (ii) to the
effect that this  Agreement and such other  agreements  are valid and binding on
Seller or its  Affiliates,  as  applicable  (but  expressing  no  opinion  as to
enforceability).

         6.1.8 Secretary's  Certificate.  Seller shall have delivered to Buyer a
certificate  dated the Closing  Date  executed by the  secretary or an assistant
secretary  of Seller,  certifying  that the  resolutions  of Seller  authorizing
entering into this Agreement and in full force and effect.

         6.1.9  Resignations.  Seller  shall  have  delivered  to Buyer the duly
executed  resignations  of all  Class A  directors  and the  officers  listed on
Schedule 6.1.9.

                                                      -27-





         6.1.10 Scheduled Payments. All scheduled payments on Long Term Debt due
on or before the Effective Date pursuant to the applicable amortization schedule
therefor shall have been paid.

6.2 Seller's  Obligation to Close.  The obligation of Seller to close under this
Agreement is subject to the  fulfillment,  on the Closing  Date,  of each of the
following  conditions  (except to the extent  that Seller  shall have  hereafter
agreed in writing to waive one or more of such conditions):

         6.2.1  Compliance  with  Agreement.  Buyer  shall  have  performed  and
complied in all material respects with all covenants to be performed or complied
with by Buyer on or prior to the Closing.

         6.2.2   Representations   and  Warranties.   The   representations  and
warranties of Buyer contained in this Agreement shall be true and correct in all
material respects at and as of the Closing

         6.2.3 Certificate.  Buyer shall have delivered to Seller a certificate,
dated the  Closing  Date,  executed  on its  behalf by its  president  or a vice
president,  to the effect that the  conditions in Sections  6.2.1 and 6.2.2 have
been satisfied,  except for any exceptions noted in such certificate.  If any of
Seller's  conditions to Closing have not been satisfied,  but Seller nonetheless
waives the  satisfaction of such condition,  Seller shall not be entitled to any
increase in the Purchase Price or any recourse,  including indemnification under
Section 7.2, against Buyer with respect to the matters so waived.

         6.2.4  Opinion.  Buyer  shall  have  delivered  to Seller an opinion of
internal counsel (i) covering due authorization, execution and delivery by Buyer
and its Affiliates,  as applicable,  of this Agreement,  any separate agreements
executed  contemporaneously  herewith between Seller or its Affiliates and Buyer
or its  Affiliates  (including  the Guaranty by Calpine  Corporation  of Buyer's
obligations  hereunder in favor of Seller),  and the  Assignment  Agreements and
(ii) to the effect that this  Agreement and such other  agreements are valid and
binding on Buyer or its Affiliates,  as applicable (but expressing no opinion as
to enforceability).

         6.2.5 Filings.  Any  applicable  waiting period under the HSR Act shall
have expired.

         6.2.6  Litigation.  There  shall  not  be  pending  any  litigation  or
proceeding  (filed by a person or entity other than Seller or its Affiliates) to
restrain or prohibit  the  transactions  contemplated  by this  Agreement  or to
obtain  material  damages  or  other  material  relief  in  connection  with the
consummation of such transactions.

         6.2.7 Assignment Agreements. Buyer shall have executed and delivered to
Seller the Assignment Agreements,  duly executed by Buyer and its Affiliates (to
the extent they are parties  thereto) and all necessary  consents  thereto shall
have been obtained.

         6.2.8 Long Term Debt.  Buyer shall have  purchased  the Long Term Debt,
including the  outstanding  principal and interest  thereunder,  pursuant to the
Assignment of Notes and shall have otherwise  obtained the release of Seller and
its Affiliates from liability under the Credit Support  Obligations  (other than
the Surety Agreement) pursuant to documents and agreements in form and substance
reasonably  acceptable to Seller or, with respect to Credit Support  Obligations
other than

                                      -28-





the UCC Guaranty Agreement, Buyer shall indemnify Seller and its Affiliates with
respect thereto pursuant to Section 7.2(B).

         6.2.9 Release.  Seller and its Affiliates shall have obtained releases,
in form and substance  satisfactory to Seller, of all of its and its Affiliates'
obligations  under  the  Credit  Support  Obligations,  other  than  the  Surety
Agreement.

                                   ARTICLE VII
                                 INDEMNIFICATION


7.1 Indemnification of Buyer. (A) After the Closing, subject to Sections 7.1(B),
7.5 and 7.6, Seller shall indemnify Buyer against, and hold Buyer harmless from,
any loss,  damage,  cost,  liability or expense  (including  reasonable costs of
defense and  investigations,  settlements,  and reasonable  attorneys'  fees) or
penalties or fines  (collectively  "Losses") Buyer incurs or becomes subject to,
to the extent  arising out of or resulting  from any  inaccuracy in or breach of
any of the (i)  representations  and warranties or (ii) covenants made by Seller
herein  (any such Loss being  referred to herein as "Buyer  Indemnified  Loss");
provided  that Seller shall have no liability  under  Section  7.1(A) unless the
aggregate of all Buyer  Indemnified  Losses for which Seller would, but for this
proviso,  be liable exceeds on a cumulative basis  $1,000,000,  and then only to
the extent of any such excess;  and further  provided that Seller shall not have
any  liability  under  Section  7.1(A)  for any  individual  item where the Loss
relating to such item is less than $25,000;  and further  provided  that, in the
case of Section  4.1.16,  in no event shall the  aggregate  liability  of Seller
exceed $4,000,000;  and further provided that the aggregate  liability of Seller
under  this  Section  7.1(A)  for  Buyer  Indemnified  Losses  (excluding  Buyer
Indemnified  Losses  resulting  from a breach of Sections  4.1.2 or 4.1.5(B) and
excluding  purchase price adjustments and matters covered by separate  agreement
executed  concurrently  herewith  which  state that they are not subject to such
limitations)  shall in no event exceed  $10,000,000;  and further  provided that
Seller's  liability with respect to a breach of the  representations  in Section
4.1.2 and 4.1.5(B)  shall not exceed the Purchase  Price;  and further  provided
that the aggregate  liability of Seller under this  Agreement  (including  Buyer
Indemnified Losses resulting from breach of Section 4.1.2 or 4.1.5(B)) and under
any  certificate  to be delivered by Seller or its Affiliates at the Closing and
under any agreement  delivered in connection  herewith  shall in no event exceed
the Purchase Price;  and further provided that in no event shall Seller have any
obligation to indemnify  Buyer with respect to any Losses arising out of default
by the  Company or the  Subsidiaries  under the credit  agreements  or  security
agreements  with  respect  to the Long Term Debt (x)  unless  such  default is a
default with respect to (i) the payment of  principal,  interest,  fees or other
expenses   required  to  be  paid  under  such  credit  agreements  or  security
agreements,  (ii)  any  requirements  of  such  credit  agreements  or  security
agreements  to  deposit,  maintain,  return or  restore  funds in or to  project
accounts or reserve accounts,  or (iii) the use,  application or distribution of
funds,  including payments to Seller,  Dominion and their respective Affiliates,
or (y) unless Seller had knowledge of such default at or prior to the Closing.

         (B) The  representations  and  warranties in this  Agreement and in any
other  document or certificate  to be delivered at the Closing  pursuant  hereto
shall  survive the  Closing  solely for  purposes of this  Article VII and shall
terminate 540 days after the Closing Date, except for (i) Sections 4.1.2,

                                      -29-





4.1.5(B),  and 4.2.2,  which,  solely for purposes of this  Article  VII,  shall
survive  indefinitely,  (ii)  Section  4.1.14,  which shall  terminate  upon the
expiration of the statute of  limitations  applicable to tax matters,  and (iii)
Section  4.1.16,  which shall  terminate  1,095 days after the Closing  Date. No
action can be brought  with  respect  to any  breach of any  representation  and
warranty  under  this  Agreement  or any other  document  or  certificate  to be
delivered  at the Closing  pursuant  hereto  unless a Claim  Notice or Indemnity
Notice specifying the breach of the representation or warranty forming the basis
of such claim has been  delivered  to the party  alleged to have  breached  such
representation or warranty prior to the termination date of such  representation
or warranty as described in this Section  7.1(B).  Any claim for  indemnity  for
breach of covenant herein that pursuant to its terms is to be performed prior to
the Closing shall be effective  only as to matters with respect to which a Claim
Notice has been  delivered  pursuant  hereto  within 180 days after the  Closing
Date. The limited rights  provided to Buyer and Seller  pursuant to this Article
VII and Article VIII shall be the sole remedy for any inaccuracy in or breach of
any  representations,  warranties or covenants contained in this Agreement or in
any document or certificate to be delivered at the Closing. Except to the extent
expressly set forth in Section 4.1 or in any agreement or certificate  delivered
by Seller  or its  Affiliates  at the  Closing,  neither  Seller,  Company,  any
Subsidiary nor any of their respective  Affiliates makes any  representations or
warranties   whatsoever   and  Seller   hereby   disclaims   all  liability  and
responsibility for any other representation,  warranty, statement or information
made or communicated (orally or in writing) to Buyer (including, but not limited
to, any  information  contained in the data room  maintained  by or on behalf of
Seller or any  opinions,  information  or advice which may have been provided to
Buyer by any officer,  stockholder,  director,  employee,  agent,  consultant or
representative  of Seller,  Company,  any Subsidiary or any of their  respective
Affiliates).  Without  limiting  the  generality  of the  foregoing,  except  as
expressly  set forth in Section 4.1 or any  certificates  delivered by Seller or
its Affiliates at the Closing,  neither Seller,  Company, any Subsidiary nor any
of their respective  Affiliates makes any  representation  or warranty as to (i)
title to any of the properties or assets of Company or any Subsidiary,  (ii) the
Facilities,  or (iii) the  prospects  of the  business  of the  Company  and the
Subsidiaries.  SELLER  EXPRESSLY  DISCLAIMS  AND  NEGATES ANY IMPLIED OR EXPRESS
WARRANTY  OF  MERCHANTABILITY,   OR  FITNESS  FOR  PARTICULAR  PURPOSE,  AND  OF
CONFORMITY  TO SAMPLES AND  MODELS.  To the fullest  extent  permitted  by Legal
Requirements,  Buyer and Seller hereby waive any and all rights they may have at
law or in equity  except as set forth in this  Article  VII with  respect to any
inaccuracy in or breach of any  representation  or warranty and covenant in this
Agreement or in any  certificates to be delivered by Seller or its Affiliates at
the Closing.

7.2  Indemnification  and Release of Seller.  (A) After the Closing,  subject to
Section 7.5, Buyer shall  indemnify  Seller  against,  and hold Seller  harmless
from, any Losses Seller incurs or becomes  subject to, to the extent arising out
of  or  resulting   from  any  inaccuracy  in  or  breach  of  any  of  the  (i)
representations  and warranties or (ii) covenants made by Buyer herein (any such
Loss being  referred to herein as a "Seller  Indemnified  Loss");  provided that
Buyer shall have no liability  under Section  7.2(A) unless the aggregate of all
Seller  Indemnified Losses (excluding Seller Indemnified Losses resulting from a
breach of Section  4.2.2,  4.2.8 or 5.2.6) for which Buyer  would,  but for this
proviso,  be liable exceeds on a cumulative basis  $1,000,000,  and then only to
the extent of any such excess;  and further  provided  that Buyer shall not have
any  liability  under  Section  7.2(A)  for any  individual  item where the Loss
relating to such item is less than $25,000; and further provided that

                                      -30-





the  aggregate  liability  of  Seller  under  this  Section  7.2(A)  for  Seller
Indemnified  Losses (excluding Seller Indemnified Losses resulting from a breach
of Section  4.2.2,  4.2.8 or 5.2.6)  shall in no event exceed  $10,000,000;  and
further  provided  that the  aggregate  liability of Buyer under this  Agreement
(including Seller  Indemnified Losses resulting from breach of Section 4.2.2) or
in any certificate delivered by Buyer or its Affiliates at the Closing) shall in
no  event  exceed  the  sum of the  Purchase  Price  and the  total  outstanding
principal and interest under the Long Term Debt.

         (B) After the Closing,  Buyer shall  indemnify and hold harmless Seller
and its  Affiliates  from any Losses  arising out of  obligations  to be paid or
performed  from and after the  Closing  under the  Credit  Support  Obligations,
except for Credit Support  Obligations  with respect to which Seller has advised
Buyer in writing at or before the Closing that any release received with respect
thereto is satisfactory in form and substance to Seller.

         (C) Except as expressly set forth in Section 4.2 or in any  certificate
to be delivered by Buyer or its Affiliates at the Closing, neither Buyer nor any
of its Affiliates makes any representations or warranties whatsoever,  and Buyer
hereby disclaims all liability and responsibility for any other  representation,
warranty,  statement or information made or communicated  (orally or in writing)
to  Seller  and  its  Affiliates.  To the  fullest  extent  permitted  by  Legal
Requirements, Seller and its Affiliates hereby waive any and all rights they may
have at law or in equity except as set forth in this Article VII with respect to
any inaccuracy in or breach of any representation,  warranty or covenant in this
Agreement or in any  certificate  to be delivered by Buyer or its  Affiliates at
the Closing.

7.3  Applicability.  SUBJECT TO SECTIONS  7.5 AND 7.6,  THE  PROVISIONS  OF THIS
ARTICLE  VII  SHALL  APPLY   NOTWITHSTANDING   THE  SOLE,  JOINT  OR  CONCURRENT
NEGLIGENCE,  STRICT  LIABILITY OR OTHER FAULT OF THE INDEMNIFIED  PARTY. IF BOTH
THE INDEMNIFIED  PARTY AND THE INDEMNIFYING  PARTY ARE ADJUDICATED  NEGLIGENT OR
OTHERWISE AT FAULT OR STRICTLY LIABLE WITHOUT FAULT, THE CONTRACTUAL OBLIGATIONS
OF INDEMNIFICATION UNDER THIS ARTICLE VII SHALL, SUBJECT TO SECTION 7.5 AND 7.6,
CONTINUE,  BUT THE INDEMNIFYING PARTY SHALL INDEMNIFY THE INDEMNIFIED PARTY ONLY
FOR THE PERCENTAGE OF RESPONSIBILITY  FOR THE DAMAGE OR INJURIES  ADJUDICATED TO
BE ATTRIBUTABLE TO THE INDEMNIFYING PARTY.

         7.4 Indemnification  Procedures.  All claims for indemnification  under
this Agreement shall be asserted and resolved as follows:

         (A)  A  party  claiming   indemnification   under  this  Agreement  (an
"Indemnified  Party") with respect to any  third-party  claim or claims asserted
against the  Indemnified  Party  ("Third Party Claim") that could give rise to a
right of  indemnification  under this  Agreement  shall  promptly (i) notify the
party from whom  indemnification  is sought  (the  "Indemnifying  Party") of the
Third Party Claim and (ii) transmit to the  Indemnifying  Party a written notice
("Claim Notice")  describing in reasonable  detail the nature of the Third Party
Claim,  a copy of all papers  served  with  respect to such claim (if any),  the
Indemnified  Party's best estimate of the amount of damages  attributable to the
Third  Party  Claim  and  the  basis  of the  Indemnified  Party's  request  for
indemnification under this

                                      -31-





Agreement. Subject to Section 7.1(B), failure to provide such Claim Notice shall
not affect the right of the Indemnified Party's indemnification hereunder except
to the extent the Indemnifying Party is prejudiced thereby. Within 30 days after
receipt of any Claim Notice (the  "Election  Period"),  the  Indemnifying  Party
shall notify the Indemnified  Party (x) whether the Indemnifying  Party disputes
its  potential  liability to the  Indemnified  Party under this Article VII with
respect to such Third Party Claim and (y) whether the Indemnifying Party desires
to defend the Indemnified Party against such Third Party Claim; provided that if
the  Indemnifying  Party  fails to so notify the  Indemnified  Party  during the
Election  Period,  the  Indemnifying  Party  shall be deemed to have  elected to
dispute such liability.

         (B) If the Indemnifying Party notifies the Indemnified Party within the
Election  Period that the  Indemnifying  Party does not  dispute  its  potential
liability  to the  Indemnified  Party  under  this  Article  VII  and  that  the
Indemnifying  Party elects to assume the defense of the Third Party Claim,  then
the  Indemnifying  Party  shall have the right to  defend,  at its sole cost and
expense,  such  Third  Party  Claim  by  all  appropriate   proceedings,   which
proceedings shall be prosecuted  diligently by the Indemnifying Party to a final
conclusion or settled at the discretion of the Indemnifying  Party in accordance
with this Section 7.4(B). The Indemnifying Party shall have full control of such
defense  and  proceedings,  including  any  compromise  or  settlement  thereof;
provided  that  counsel  selected  by the  Indemnifying  Party  to  defend  such
proceedings shall be reasonably acceptable to the Indemnified Party; and further
provided  that the  Indemnifying  Party  shall  not  enter  into any  settlement
agreement providing for (i) a finding of responsibility or liability on the part
of the Indemnified  Party,  (ii) any material  sanction or material  restriction
upon the conduct of any business, (iii) an affirmative obligation on the part of
the  Indemnified  Party,  other than an  obligation  to pay money  which will be
discharged  in full by the  Indemnifying  Party,  or (iv) any  amendment  to any
contract, agreement, instrument or other document binding on Buyer, the Company,
either Subsidiary,  EC5, or their respective  Affiliates;  in each case, without
the  Indemnified  Party's  consent,  which  consent  shall  not be  unreasonably
withheld.  The  Indemnified  Party is  hereby  authorized,  at the sole cost and
expense of the  Indemnifying  Party (but only if pursuant to Section  7.4(D) the
Indemnified Party is actually entitled to indemnification  hereunder),  to file,
during the Election  Period,  any motion,  answer or other  pleadings  which the
Indemnified  Party shall deem  necessary or appropriate to protect its interests
or those of the Indemnifying Party and not prejudicial to the Indemnifying Party
(it being  understood  and agreed  that if an  Indemnified  Party takes any such
action,  the Indemnifying  Party shall be relieved of its obligations  hereunder
with respect to such Third Party Claim to the extent that such action prejudiced
the Indemnifying Party). If requested by the Indemnifying Party, the Indemnified
Party  agrees,  at the sole  cost and  expense  of the  Indemnifying  Party,  to
cooperate  with the  Indemnifying  Party and its counsel in contesting any Third
Party Claim which the Indemnifying Party elects to contest, including the making
of any related  counterclaim  against the person or entity  asserting  the Third
Party Claim or any cross-complaint against any person or entity. The Indemnified
Party may  participate  in, but not control,  any defense or  settlement  or any
Third Party Claim controlled by the Indemnifying  Party pursuant to this Section
7.4,  and the  Indemnified  Party  shall  bear its own costs and  expenses  with
respect to such participation.

         (C) If the  Indemnifying  Party fails to notify the  Indemnified  Party
within the  Election  Period that the  Indemnifying  Party  elects to defend the
Indemnified Party pursuant to Section 7.4(B),

                                      -32-





or if the Indemnifying  Party elects to defend the Indemnified Party pursuant to
Section  7.4(B) but fails to  diligently  prosecute  or settle  the Third  Party
Claim,  then the Indemnified  Party shall have the right to defend,  at the sole
cost and  expense of the  Indemnifying  Party (but only if  pursuant  to Section
7.4(D) the Indemnified Party is actually entitled to indemnification hereunder),
the Third Party Claim by all appropriate proceedings, which proceedings shall be
promptly  and  vigorously  prosecuted  by  the  Indemnified  Party  to  a  final
conclusion  or settled.  The  Indemnified  Party shall have full control of such
defense and proceedings;  provided,  however, that the Indemnified Party may not
enter  into,  without  the  Indemnifying  Party's  consent,  which  shall not be
unreasonably  withheld,  any compromise or settlement of such Third Party Claim.
The  Indemnifying  Party may  participate  in, but not  control,  any defense or
settlement  controlled by the Indemnified Party pursuant to this Section 7.4(C),
and the Indemnifying Party shall bear its own costs and expenses with respect to
such participation.

         (D) If the  Indemnifying  Party  elects  not to (or is  deemed  to have
elected not to) assume the defense of a Third Party  Claim,  or elects to assume
the defense of a Third Party Claim,  but  reserves the right to dispute  whether
such claim is an indemnifiable loss under this Article VII, the determination of
whether the Indemnified Party is entitled to indemnification  hereunder shall be
resolved by litigation in an appropriate court of competent jurisdiction.

         (E) In the event any Indemnified  Party should have a claim against any
Indemnifying  Party  hereunder  which does not involve a Third Party Claim,  the
Indemnified  Party shall promptly  transmit to the Indemnifying  Party a written
notice (the "Indemnity  Notice")  describing in reasonable  detail the nature of
the  claim,  the  Indemnified  Party's  best  estimate  of the amount of damages
attributable to such claim and the basis of the Indemnified  Party's request for
indemnification under this Agreement.  If the Indemnifying Party does not notify
the  Indemnified  Party within 30 days from its receipt of the Indemnity  Notice
that the Indemnifying Party disputes such claim, the Indemnifying Party shall be
deemed to have disputed such claim. If the  Indemnifying  Party has disputed (or
is deemed to have  disputed)  such  claim,  such  dispute  shall be  resolved by
litigation in an appropriate court of competent jurisdiction.

         (F)  Payments  of all  amounts  owing by the  Indemnifying  Party  with
respect to a Third  Party Claim shall be made within 30 days after the latest of
(i) the  settlement of the Third Party Claim,  (ii) the expiration of the period
for  appeal of a final  adjudication  of such  Third  Party  Claim and (iii) the
expiration of the period for appeal of a final  adjudication of the Indemnifying
Party's liability to the Indemnified Party under this Agreement. Payments of all
amounts owing by the Indemnifying  Party as described in Section 7.3(E) shall be
made within 30 days after the earlier of the expiration of the period for appeal
of a final  adjudication  or agreement  between the  Indemnifying  Party and the
Indemnified  Party as to the Indemnifying  Party's  liability to the Indemnified
Party under this Agreement.

7.5  Limitation  on  Liabilities.  (A) IN NO  EVENT  SHALL  THE  INDEMNIFICATION
OBLIGATIONS UNDER THIS AGREEMENT  (INCLUDING UNDER ARTICLE VII AND ARTICLE VIII)
OR THE  TERM  "LOSSES"  COVER OR  INCLUDE  CONSEQUENTIAL,  INCIDENTAL,  SPECIAL,
INDIRECT,  OR PUNITIVE DAMAGES OR LOST PROFITS  SUFFERED BY THE COMPANY,  BUYER,
SELLER OR SELLER'S AFFILIATES, WHETHER

                                      -33-





BASED ON STATUTE, CONTRACT, TORT OR OTHERWISE, AND WHETHER OR NOT
ARISING FROM THE INDEMNIFYING PARTY'S SOLE, JOINT OR CONCURRENT
NEGLIGENCE, STRICT LIABILITY OR OTHER FAULT.

         (B)  Notwithstanding   anything  to  the  contrary  contained  in  this
Agreement, (i) no amounts of indemnity shall be payable as a result of any claim
in  respect  of a Loss under  Articles  VII or VIII to the  extent  that (1) the
Indemnified Party failed to promptly notify the Indemnifying Party of such claim
and the Indemnifying  Party's liability with respect to such claim was adversely
affected  by  such  failure,  or (2)  the  Indemnified  Party  had a  reasonable
opportunity,  but failed,  in good faith to  mitigate  the Loss,  including  the
failure to use Best  Efforts to recover  under a policy of  insurance or under a
contractual right of set-off or indemnity,  (ii) all indemnifiable  Losses under
Articles VII or VIII shall be net of insurance proceeds recovered or recoverable
by the Indemnified  Party and net of tax benefits to the  Indemnified  Party and
its Affiliates,  (iii) in no event shall Seller be responsible for more than 50%
of the amount of Loss suffered or incurred in whole or in part by the Company or
the Subsidiaries (as opposed to a Loss suffered or incurred solely by Buyer; for
example,  a breach of Section  4.1.5(B),  and (iv) the amounts of indemnity  and
Losses  described  in this  Section  7.5  shall in all cases be  subject  to the
restrictions  in Section 7.1, and the provisions of this Section 7.5 shall in no
event expand the  liability of Seller under Section 7.1. The  Indemnified  Party
hereby  waives (or will  cause to be waived)  any  subrogation  rights  that its
insurers may have with respect to any indemnifiable Losses.

7.6  Notification  by Seller of Certain  Matters.  Seller may,  at the  Closing,
notify  Buyer in one or more of the  certificates  to be  delivered  pursuant to
Section 6.1.3, in reasonable detail of any  representation or warranty of Seller
that was not  true and  correct  as of the date of this  Agreement  or as of the
Closing or of any  covenant of Seller that has not been  performed  and complied
with and, if Buyer shall  nevertheless  close under this Agreement,  none of the
matters set forth in such certificate  shall be deemed to be an inaccuracy in or
breach of any of the  representations  and  warranties  or  covenants  of Seller
herein for purposes of, and Buyer shall not be entitled to be  indemnified as to
any of such matters pursuant to, this Article VII.

                                  ARTICLE VIII
                               TERMINATION RIGHTS


8.1  Termination.  This  Agreement  may be  terminated  at any time prior to the
Closing Date as follows, and in no other manner:

         (i) by mutual consent of Buyer and Seller;

         (ii) by notice from Seller to Buyer, if the Closing Date shall not have
occurred on or before May 15, 1997;

         (iii) by notice  from Buyer to Seller,  if the  Closing  Date shall not
have occurred on or before May 15, 1997;


                                      -34-





         (iv)  by  either  party  by  notice  to  the  other,  if  (a)  a  final
non-appealable  judgment  has  been  entered  against  such  party or any of its
Affiliates  restraining,  prohibiting  or  declaring  illegal  the  transactions
contemplated  hereby or (b) the  Company or any of the  Subsidiaries  shall have
declared  bankruptcy or been  involuntarily put into bankruptcy or receivership;
or

         (v)  notwithstanding  Section  5.1.10  or any other  provision  of this
Agreement,  by notice from Seller to Buyer,  if at any time prior to the Closing
Seller reasonably believes, in its sole discretion,  that the approvals required
(in Seller's  judgment) to enter into this  Agreement or the Assignment of Notes
or to consummate  the  transactions  contemplated  hereby or thereby in a manner
that releases  Seller and its Affiliates from liability under the Credit Support
Obligations  (including  any  approvals  from  Dominion or its  Affiliates,  the
lenders  under  the Long Term  Debt,  and Union  Carbide  Corporation  under the
Guaranty  Agreement,  but  excluding  any  consent of Texas  Utilities  Electric
Company  under the  Surety  Agreement)  will not be  obtained  in a time  period
satisfactory to Seller in its sole discretion.

8.2 Limitation on Right to Terminate;  Effect of Termination.  (A) A party shall
not be allowed to exercise any right of  termination  pursuant to Section 8.1 if
the event  giving  rise to the  termination  right  shall be due to the  willful
failure of such party to perform or observe in any  material  respect any of the
covenants set forth herein to be performed or observed by such party.

         (B) If this  Agreement is  terminated  as permitted  under Section 8.1,
such termination shall be without liability of or to any party to this Agreement
or  any  Affiliate,   shareholder,   director,   officer,   employee,  agent  or
representative  of such party;  provided that  Sections  4.1.19,  4.2.6,  5.1.6,
5.1.7,  5.1.8,  5.2.2,  5.2.3,  5.2.4, 8.2, 9.10 and 9.11 shall survive any such
termination; and further provided that if any such termination under Section 8.1
(excluding Section 8.1(v)) shall result from the willful failure of any party or
its Affiliate to perform a covenant of this  Agreement or from a willful  breach
of this  Agreement by any party or its  Affiliate,  or a breach,  whether or not
willful,  of Section 4.2.8 or 5.2.6 by Buyer, then, subject to Article VII, such
party shall be liable for Losses sustained or incurred by the other parties as a
result of such failure or breach.

                                   ARTICLE IX
                                     GENERAL

9.1 Exclusive  Agreement;  Schedules.  This Agreement and the attached schedules
and exhibits,  the  agreements and documents to be executed  pursuant  hereto or
which are executed concurrently  herewith and the Confidentiality  Agreement set
forth the entire  agreement and  understanding  of the parties in respect of the
transactions   contemplated   hereby  and   supersede   all  prior   agreements,
arrangements and undertakings  (oral or written)  relating to the subject matter
hereof.  The disclosures in the schedules  hereto are to be taken as relating to
the  representations  and  warranties  of Seller as a whole.  The  inclusion  of
information in the schedules  hereto shall not be construed as an admission that
such information is material.  In addition,  matters  reflected in the schedules
are  not  necessarily  limited  to  matters  required  by this  Agreement  to be
reflected  on  such  schedules.  Such  additional  matters  are  set  forth  for
information purposes only and do not necessarily include

                                      -35-





other matters of a similar nature.  No  representation,  promise,  inducement or
statement  of  intention  has been made by any party which is not embodied in or
superseded  by  this  Agreement  or  the  Confidentiality  Agreement  or in  the
agreements and documents to be executed  pursuant hereto,  and no party shall be
bound by or  liable  for any  alleged  representation,  promise,  inducement  or
statement of intention not so set forth.

9.2  Successors  and  Assigns.  All of the  terms,  covenants,  representations,
warranties and conditions of this Agreement  shall be binding upon, and inure to
the benefit of, and be enforceable  by, the parties hereto and their  respective
permitted  successors and assigns (and in the case of indemnities to the benefit
of all  persons  indemnified).  This  Agreement  and the rights and  obligations
hereunder  shall not be assigned  by any party  hereto (by  operation  of law or
otherwise) without the prior written consent of the other party, except that any
party may assign an interest in all of its rights  hereunder  to any  Affiliate;
provided  that no assignment  shall  relieve the  assigning  party of any of its
representations,  warranties,  or obligations  contained herein, and except that
after the Closing  Buyer may  collaterally  assign its rights  hereunder  to the
lenders of the Company, the Subsidiaries, Buyer or its Affiliates, to secure the
Long Term Debt or any extensions or replacements  thereof or any other financing
or refinancing of the Facilities.

9.3 Amendments. This Agreement may be amended, modified, superseded or canceled,
and any of the  terms,  covenants,  representations,  warranties  or  conditions
hereof may be  waived,  only by a written  instrument  executed  by the  parties
hereto,  or,  in the case of a waiver,  by or on  behalf  of the  party  waiving
compliance. The failure of any party at any time or times to require performance
of any provisions  hereof shall in no manner affect the right at a later time to
enforce the same. No waiver by any party of any  condition,  or of any breach of
any term, covenant,  representation or warranty contained in this Agreement,  in
any one or more  instances,  shall be deemed to be or  construed as a further or
continuing  waiver  of any such  condition  or  breach  or a waiver of any other
condition  or of any  breach  of any other  term,  covenant,  representation  or
warranty.

9.4 Records and Access. (A) After the Closing, Seller shall deliver to Buyer all
files and records in its  possession  that are normally  maintained by Seller or
its  Affiliates  in  respect  of  the  Company   (including  all  documents  and
information  contained in the data room maintained by or on behalf of Seller) as
soon as practicable; provided that Seller may make and keep copies of such files
and records.

         (B) From and after the  Closing,  Buyer  shall  maintain  copies of all
books,  records and other information  (including books, records and information
relating  to  financial  information,  taxes  and  litigation)  relating  to the
Facilities  and the  Company and shall not  destroy  any of same  without  first
allowing Seller, at Seller's expense, the opportunity to make copies of same for
a period of not less than five years (or if longer,  the  applicable  statute of
limitations  period).  During  such  period,  Buyer  shall give Seller and their
representatives  reasonable  cooperation,  access and staff  assistance,  during
normal  business hours and upon reasonable  notice,  with respect to such books,
records and  information  as may be  necessary  for general  business  purposes,
including for the  preparation  of tax returns and financial  statements and the
management  and  handling  of tax  audits  and  litigation;  provided  that such
requested  cooperation,  access and assistance shall not unreasonably  interfere
with the normal operations of Buyer.

                                      -36-





9.5 Further Assurances. Each party agrees to execute such further instruments or
documents as the other party may from time to time  reasonably  request in order
to  confirm  or  carry  out the  transactions  contemplated  in this  Agreement;
provided that no such instrument or document shall expand a party's  obligations
or liabilities beyond that contemplated in this Agreement.

9.6  Notices.   All  notices,   requests,   demands  and  other   communications
(collectively,  "Notices")  required or permitted to be given hereunder shall be
in writing and  delivered  personally,  or by facsimile  transmission  or mailed
first class, postage prepaid, registered or certified mail, as follows:

         If to Buyer, to:

         Calpine Finance Company
         50 West San Fernando
         San Jose, California 95113
         Attention:  Ron Walter and Joseph E. Ronan
         Facsimile Number: (405) 995-0505

         with a copy to:

         Washburn, Briscoe & McCarthy
         A Professional Corporation
         55 Francisco Street, Suite 600
         San Francisco, California  94133
         Attention:  David C. Spielberg
         Facsimile Number:  (415) 421-5044

         If to Seller, to:

         Enron Power Corp.
         Enron Building
         1400 Smith
         Houston, Texas  77002
         Attention:  General Counsel
         Facsimile Number:          (713) 646-3491

         with a copy to:

         Vinson & Elkins L.L.P.
         2300 First City Tower
         1001 Fannin
         Houston, Texas  77002
         Attention:  Marcia E. Backus
         Facsimile Number:  (713) 615-5606


                                      -37-





All Notices  shall be effective  upon  receipt.  Any party may change its Notice
address by giving written Notice to the other in the manner specified above.

9.7      Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED
AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS
WITHOUT REGARD TO CONFLICT OF LAW PRINCIPLES.

9.8  Severability.  In the event  any of the  provisions  hereof  are held to be
invalid or unenforceable under any Legal Requirement,  the remaining  provisions
hereof shall not be affected  thereby.  In such event,  the parties hereto agree
and consent  that such  provisions  and this  Agreement  shall be  modified  and
reformed  so as to effect  the  original  intent of the  parties  as  closely as
possible  with  respect  to those  provisions  which  were held to be invalid or
unenforceable.

9.9 Counterparts.  This Agreement may be executed  simultaneously in two or more
counterparts,  each of which shall be deemed an original, but all of which shall
constitute but one agreement.

9.10 Expenses.  Except as expressly  provided in this Agreement,  whether or not
the transactions  contemplated hereby are consummated,  each party shall pay its
own expenses  incident to the preparation of this Agreement and for consummating
the transaction.

9.11 Attorneys'  Fees. If any party institutes legal action against the other to
enforce this  Agreement,  the party  prevailing  pursuant to any final  judgment
shall be entitled to recover its  reasonable  attorneys'  fees and expenses from
the other party that are attributable solely to such enforcement (subject to the
caps and other limits set forth in Article VII).


                                      -38-





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

Seller:

ENRON POWER CORP.

By:
Name:
Title:

Buyer:

CALPINE FINANCE COMPANY


By:
Name:
Title:



C:\PUR15.WPD


                                      -39-





                           PURCHASE AND SALE AGREEMENT

                                TABLE OF CONTENTS


                                    ARTICLE I
                                   DEFINITIONS

1.1 Definitions................................................................1
- -----------
1.2 Terminology................................................................6
- -----------

                                   ARTICLE II
                                PURCHASE AND SALE

2.1 Purchase and Sale of Class A Common Stock..................................7
- -----------------------------------------
2.2 Purchase Price.............................................................7
- --------------
2.3 Determination of Purchase Price............................................7
- -------------------------------

                                   ARTICLE III
                                  CLOSING DATE


                                   ARTICLE IV
                         REPRESENTATIONS AND WARRANTIES

4.1 Representations and Warranties of Seller...................................9
- ----------------------------------------
4.1.1 Organization and Good Standing...........................................9
- ------------------------------
4.1.2 Authority of Seller......................................................9
- -------------------
4.1.3 No Violations With Respect to Seller.....................................9
- ------------------------------------
4.1.4 Approvals and Consents for Seller.......................................10
                           ---------------------------------
4.1.5 Ownership...............................................................10
- ---------
4.1.6 Company and Subsidiaries................................................11
- ------------------------
4.1.7 No Violation With Respect to Company and Subsidiaries...................11
- -----------------------------------------------------
4.1.8 No Default; Legal Requirements..........................................12
- ------------------------------
4.1.9 Financial Statements....................................................13
- --------------------
4.1.10 Leases; Contracts; Agreements and Commitments..........................13
- ---------------------------------------------
4.1.11 Litigation.............................................................15
- ----------
4.1.12 Government Permits.....................................................15
- ------------------
4.1.13 Employee Benefits......................................................15
- -----------------
4.1.14 Tax Matters............................................................15
- -----------
4.1.15 Real Property..........................................................16
- -------------
4.1.16 Environmental Matters..................................................16
- ---------------------
4.1.17 Regulatory Matters.....................................................16
- ------------------
4.1.18 Sole Purpose; Nature of Business.......................................17
- --------------------------------
4.1.19 Brokerage or Finders Fees..............................................17
- -------------------------

                                       -i-





4.1.20 Insurance..............................................................17
- ---------
4.1.21 Material Assets and Properties.........................................17
- ------------------------------

4.2 Representations and Warranties of Buyer...................................17
- ---------------------------------------
4.2.1 Organization and Good Standing..........................................17
- ------------------------------
4.2.2 Authority of Buyer......................................................17
- ------------------
4.2.3 No Violations...........................................................18
- -------------
4.2.4 Approvals and Consents..................................................18
- ----------------------
4.2.5 Acquisition as Investment...............................................18
- -------------------------
4.2.6 Brokerage or Finders Fees...............................................18
- -------------------------
4.2.7 No Electric Utility Ownership...........................................18
- -----------------------------
4.2.8 Available Funds.........................................................19
- ---------------
4.2.9 Knowledgeable Buyer.....................................................19
- -------------------

                                    ARTICLE V
                       ADDITIONAL AGREEMENTS AND COVENANTS

5.1 Covenants of Seller.......................................................19
- -------------------
5.1.1 Certain Changes.........................................................19
- ---------------
5.1.2 Operation of Business...................................................21
- ---------------------
5.1.3 Insurance...............................................................21
- ---------
5.1.4 Access..................................................................21
- ------
5.1.5 Antitrust Notification and Other Governmental Filings...................21
- -----------------------------------------------------
5.1.6 Confidentiality.........................................................22
- ---------------
5.1.7 Public Announcements....................................................22
- --------------------
5.1.8 Transaction Costs.......................................................22
- -----------------
5.1.9 Noncompetition..........................................................22
- --------------
5.1.10 Satisfaction of Closing Conditions.....................................22
- ----------------------------------

5.2 Covenants of Buyer........................................................22
- ------------------
5.2.1 Antitrust Notification and Other Governmental Filings...................22
- -----------------------------------------------------
5.2.2 Public Announcements....................................................23
- --------------------
5.2.3 Confidential Information................................................23
- ------------------------
5.2.4 Transaction Costs.......................................................23
- -----------------
5.2.5 Satisfaction of Closing Conditions......................................23
- ----------------------------------
5.2.6 Bank Account and Line of Credit.........................................23
- -------------------------------
5.2.7 Certain FERC Matters....................................................23
- --------------------

5.3 Mutual Covenants..........................................................24
- ----------------
5.3.1 Release.................................................................24
- -------
5.3.2 Tax Returns.............................................................24
- -----------
5.3.4 Employment Matters......................................................24
- ------------------

                                   ARTICLE VI
                              CONDITIONS TO CLOSING

                                      -ii-





6.1 Buyer's Obligation to Close...............................................26
- ---------------------------
6.1.1 Compliance with Agreement...............................................26
- -------------------------
6.1.2 Representations and Warranties..........................................26
- ------------------------------
6.1.3 Certificate.............................................................26
- -----------
6.1.4 Filings.................................................................27
- -------
6.1.5 Litigation..............................................................27
- ----------
6.1.6 Stock Certificates; Assignment Agreements...............................27
- -----------------------------------------
6.1.7 Opinion.................................................................27
- -------
6.1.8 Secretary's Certificate.................................................27
- -----------------------
6.1.9 Resignations............................................................27
- ------------
6.1.10 Scheduled Payments.....................................................27
- ------------------
6.1.11 Affidavits.............................................................27
- ----------
6.1.12 Certain Other Agreements...............................................27
- ------------------------

6.2 Seller's Obligation to Close..............................................27
- ----------------------------
6.2.1 Compliance with Agreement...............................................28
- -------------------------
6.2.2 Representations and Warranties..........................................28
- ------------------------------
6.2.3 Certificate.............................................................28
- -----------
6.2.4 Opinion.................................................................28
- -------
6.2.5 Filings.................................................................28
- -------
6.2.6 Litigation..............................................................28
- ----------
6.2.7 Assignment Agreements...................................................28
- ---------------------
6.2.8 Long Term Debt..........................................................28
- --------------
6.2.9 Release.................................................................28
- -------
6.2.10 Certain Other Agreements...............................................28
- ------------------------

                                   ARTICLE VII
                                 INDEMNIFICATION

7.1 Indemnification of Buyer..................................................29
- ------------------------
7.2 Indemnification and Release of Seller.....................................30
- -------------------------------------
7.3 Applicability.............................................................31
- -------------
7.4 Indemnification Procedures................................................31
- --------------------------
7.5 Limitation on Liabilities.................................................33
- -------------------------
7.6 Notification by Seller of Certain Matters.................................34
- -----------------------------------------

                                  ARTICLE VIII
                               TERMINATION RIGHTS

8.1 Termination...............................................................34
- -----------
8.2 Limitation on Right to Terminate; Effect of Termination...................35
- -------------------------------------------------------

                                   ARTICLE IX
                                     GENERAL


                                      -iii-





9.1 Exclusive Agreement; Schedules............................................35
- ------------------------------
9.2 Successors and Assigns....................................................35
- ----------------------
9.3 Amendments................................................................36
- ----------
9.4 Records and Access........................................................36
- ------------------
9.5 Further Assurances........................................................36
- ------------------
9.6 Notices...................................................................37
- -------
9.7 Governing Law.............................................................37
- -------------
9.8 Severability..............................................................38
- ------------
9.9 Counterparts..............................................................38
- ------------
9.10 Expenses.................................................................38
- --------
9.11 Attorneys' Fees..........................................................38
- ---------------


Exhibits to Purchase and Sale Agreement:

         Exhibit A -       Assignment and Assumption Agreements

Schedules to Purchase and Sale Agreement:

Schedule 1.1(A)            -        Knowledge
Schedule 4.1.3             -        No Violations of Seller
Schedule 4.1.5(A)          -        Company's Capital Stock
Schedule 4.1.5(E)          -        Subsidiaries' Capital Stock Debt; Other 
                                    Securities
Schedule 4.1.7             -        No Violations of Company and Subsidiaries
Schedule 4.1.8             -        No Default; Legal Requirements
Schedule 4.1.9(B)-1        -        December 31 Balance Sheet
Schedule 4.1.9(B)-2        -        Financial Statements
Schedule 4.1.9(C)          -        Balance Sheet Liabilities
Schedule 4.1.10(A)         -        Contracts of Company and its Affiliates
Schedule 4.1.10(B)         -        Contracts of Seller and its Affiliates
Schedule 4.1.10(C)         -        Obligations of Seller and its Affiliates to 
                                    be Assumed by Buyer
Schedule 4.1.11            -        Litigation
Schedule 4.1.14            -        Tax Matters
Schedule 4.1.15            -        Real Property
Schedule 4.1.16            -        Environmental Matters
Schedule 4.1.20            -        Insurance
Schedule 4.1.21            -        Excluded Assets
Schedule 5.1.1             -        Ordinary Course of Business
Schedule 5.3.4(A)          -        Employment Matters
Schedule 6.1.9             -        Directors and Officers

C:\PUR15.WPD


                                      -iv-




                           PURCHASE AND SALE AGREEMENT


                                 by and between

                                ENRON POWER CORP.

                                   (as Seller)


                                       and


                             CALPINE FINANCE COMPANY

                                   (as Buyer)






                           Dated as of March 27, 1997