FIRST AMENDMENT TO CREDIT AGREEMENT


     THIS FIRST AMENDMENT TO CREDIT  AGREEMENT,  dated as of May 9, 2002 (herein
called this "Amendment"),  is entered into by and among CALPINE  CORPORATION,  a
Delaware  corporation  (herein  called the  "Company"),  the  various  financial
institutions  listed on the signature  page hereof (the  "Lenders")  THE BANK OF
NOVA SCOTIA ("Scotiabank"),  as joint administrative agent and funding agent (in
such  capacity,   the  "Agent")  and  CITICORP  USA,  INC.  ("CUSA"),  as  Joint
Administrative  Agents  (in  such  capacity,   together  with  Scotiabank,   the
"Administrative Agents").

                              W I T N E S S E T H:
                              - - - - - - - - - -

     WHEREAS,  the  Company,  the  Lenders  and the  Administrative  Agents have
heretofore  entered into a certain Credit  Agreement,  dated as of March 8, 2002
(herein called the "Credit Agreement"); and

     WHEREAS, the Company, the Lenders and the Administrative  Agents now desire
to amend the Credit Agreement in certain respects, as hereinafter provided,

     WHEREAS,  the Company  has  requested  that the Lenders  consent to certain
corporate  mergers,  and  subject to the terms and  provisions  hereinafter  set
forth, the Lenders have agreed to do so;

     NOW, THEREFORE,  in consideration of the premises and the mutual agreements
herein contained,  the Company, the Lenders and the Administrative Agents hereby
agree as follows:

     SECTION 1. The  Administrative  Agents and the  Required  Lenders do hereby
consent to the corporate reorganizations described on Schedule 1.1 hereto.

     SECTION 2. The Credit Agreement is hereby amended as follows:

     (a) The  following  definitions  contained  in  Section  1.1 of the  Credit
Agreement are hereby amended and restated in their entirety as follows:

          "Applicable  Margin"  means,  in the case of any Base Rate Loan,  LIBO
     Rate Loan or L/C Advance maintained under the Revolving Loan Commitment,  a
     rate per annum  determined by reference to the Borrower's  Credit Rating as
     follows:



                                                 Revolving Loans
                                  Applicable Base                Applicable LIBO
     Borrower's Credit Rating       Rate Margin                    Rate Margin
                                                             
     Level 1                        1.50%                          2.50%
     Level 2                        1.75%                          2.75%
     Level 3                        2.00%                          3.00%
     Level 4                        2.25%                          3.25%
     Level 5                        2.75%                          3.75%


     The  applicable  Level for the Borrower shall be determined by reference to
     the  definition  of the term  "Borrower's  Credit  Rating." The  Applicable
     Margin  for any Term B Loan  maintained  as a LIBO Rate Loan shall be 3.75%
     and the  Applicable  Margin for any Term B Loan  maintained  as a Base Rate
     Loan shall be 2.75%. Notwithstanding anything to the contrary herein, if at
     the time of the Borrowing of Term B Loans hereunder,  the Applicable Margin
     for any Term B Loan shall have been  increased or decreased  from the rates
     set forth in the preceding  sentence in accordance  with Section 11.1,  the
     Applicable Margin for Revolving Loans as set forth above shall be increased
     or decreased by a corresponding amount.

          "Asset  Sale"  means any sale,  transfer,  lease or other  disposition
     described in Section 8.2.10(c).

          "Available  Investment and Leaseback Basket" means, as of any date, an
     amount equal to 3% of the consolidated  tangible assets of the Borrower and
     its Subsidiaries as of the end of the most recent fiscal quarter.

          "CNGC" means,  prior to the CNGC  Restructuring,  Calpine  Natural Gas
     Company   LP,  a  Delaware   limited   partnership,   and  after  the  CNGC
     Restructuring, Calpine Natural Gas Company, a Delaware corporation.

          "CNGH" means,  prior to the CNGC  Restructuring,  Calpine  Natural Gas
     Holdings,  Inc., a Delaware corporation,  and after the CNGC Restructuring,
     Calpine Natural Gas Holdings,  LLC, a Delaware limited  liability  company,
     and in either case, a direct, Wholly-Owned Subsidiary of the Borrower.

          "Dedicated Assets" means, collectively, the Domestic Gas Reserves, the
     Canadian Gas Reserves,  all property  owned by Calpine  Holdings and any of
     its  Subsidiaries,  all property owned by CCEC and any of its  Subsidiaries
     (other than Calpine Canada Power Holdings Ltd. and its  Subsidiaries),  all
     property owned by the  Incremental  Pledged  Subsidiaries  and any of their
     Subsidiaries,  the final 25% of the Borrower's  indirect  equity  ownership
     interest in the holding  company which owns the Whitbey Energy Centre,  the
     Island Energy Centre and the Calgary Energy Centre, the property subject to
     the Pledge  Agreements,  the First Amendment  Pledge  Agreements,  the Note
     Pledge  Agreement,  the Deeds of Trust, the Assignment  Agreement,  and all
     other  property  and  interests  pledged  as  collateral  security  for the
     Obligations.  The  Dedicated  Assets shall be ratably  available  under the
     Pledge Agreement,  the First Amendment Pledge  Agreements,  the Note Pledge
     Agreement,  the Deeds of Trust and the  Assignment  Agreement to secure the
     Obligations under this Agreement and the Existing Credit Agreement.

          "Dedicated  Subsidiary"  means  CCEC  and  each  of its  Subsidiaries,
     Calpine Holdings (and any successor  thereto) and each of its Subsidiaries,
     CNGH and each of its  Subsidiaries,  and  each of the  Incremental  Pledged
     Subsidiaries and each of their respective Subsidiaries.

          "Loan  Document"  means  this   Agreement,   the  Notes,   the  Pledge
     Agreements,   the  First  Amendment  Pledge  Agreements,  the  Note  Pledge
     Agreement,  the Guaranty, the Deeds of Trust, the Assignment Agreement, the
     Hazardous  Materials  Indemnity,  the Fee Letter,  and each other  relevant
     agreement, document or instrument delivered in connection therewith.

          "Required  Lenders" means, at any time, Lenders owed or holding (a) if
     the Revolving Loan Commitments shall not have been terminated, at least 51%
     of the aggregate of all Term B Loans then outstanding,  all unfunded Term B
     Loan  Commitments,  all  Revolving  Loans then  outstanding,  all Letter of
     Credit   Outstandings  on  such  date,  and  all  unfunded  Revolving  Loan
     Commitments  or (b) if the  Revolving  Loan  Commitments  shall  have  been
     terminated,  at least  51% of the  aggregate  amount  of all  Loans and L/C
     Advances then outstanding.

          "Term B Loan Commitment Termination Date" means the earliest of

               (a) June 8, 2002;

               (b) the date on which the Term B Loan  Commitments  of the Term B
          Lenders are  terminated in full or reduced to zero in accordance  with
          Section 2.2; and

               (c) the date on which any Commitment Termination Event occurs.

          Upon the  occurrence  of any event  described  above,  the Term B Loan
     Commitments shall terminate automatically and without further action.

     (b)  There  shall be added to  Section  1.1 of the  Credit  Agreement,  the
following terms in appropriate alphabetical sequence:

          "CES"  means  Calpine  Energy  Services,   L.P.,  a  Delaware  limited
     partnership.

          "CNGC  Restructuring"  means the series of  transactions  described on
     Schedule  1.1  hereof,  pursuant to which the assets of CNGC will be merged
     with and into the Borrower.

          "First  Amendment  Pledge  Agreements"  means  the  pledge  agreements
     executed and delivered  pursuant to the First Amendment to Credit Agreement
     dated as of May 9, 2002,  among the parties hereto,  as such agreements may
     be amended, supplemented, restated or otherwise modified from time to time,
     which will cover all equity  interests in each of the  Incremental  Pledged
     Subsidiaries held by the Borrower.

          "Incremental  Dedicated  Assets"  all  property  owned  by  any of the
     Incremental   Pledged   Subsidiaries   and  by  each  of  their  respective
     Subsidiaries. The Incremental Dedicated Assets shall be available under the
     First  Amendment  Pledge  Agreements to secure the  Obligations  under this
     Agreement  and the Existing  Credit  Agreement,  and all Net Cash  Proceeds
     therefrom shall be applied as provided in Sections 3.1.1 and 3.1.2.

          "Incremental  Pledged  Subsidiaries"  means  each of the  Subsidiaries
     listed on Section A of Schedule III hereof.

          "Note  Pledge  Agreement"  means the  pledge  agreement  executed  and
     delivered  by the  Borrower  pursuant  to the  First  Amendment  to  Credit
     Agreement  dated  as of May 9,  2002  among  the  parties  hereto,  as such
     agreement may be amended, supplemented, restated or otherwise modified from
     time to time, which will pledge to the Agent the promissory notes described
     in Section 8.1.10.

          "Permitted   Sale"  means  any  individual  sale,   transfer,   lease,
     contribution  or  conveyance  of a portion  of the  Domestic  Gas  Reserves
     (together  with  related  tangible  personal   property)  having  a  value,
     according to the most recent,  year-end report  evaluating the Domestic Gas
     Reserves prepared by an independent  petroleum  engineer  acceptable to the
     Agent (an "Engineering Report"), of less than $5,000,000; provided however,
     that the aggregate value of all Permitted  Sale(s) in any one calendar year
     shall not exceed  five  percent  (5%) of the value,  according  to the most
     recent Engineering Report, of all proven categories of oil and gas reserves
     then  comprising  the  Domestic  Gas  Reserves.  Solely for purposes of the
     preceding  sentence,  the  value  of such  oil and gas  reserves  shall  be
     determined  using net future cash flow,  discounted  at ten percent  (10%),
     using  the  forward  strip,  NYMEX  pricing  as of  December  31,  2001 for
     Permitted  Sales for the calendar  year ending  December 31, 2002,  and the
     forward strip,  NYMEX pricing as of each  succeeding  calendar year end for
     Permitted  Sales in the immediately  succeeding  calendar year, and in each
     case other assumptions reasonably acceptable to the Agent.

     (c) Section 2.1.1 of the Credit Agreement is hereby amended and restated to
read in its entirety as follows:

          Section 2.1.1.  Term B Loan  Commitment.  On not more than three dates
     prior to the Term B Loan  Commitment  Termination  Date, each Term B Lender
     severally  will make loans in U.S.  Dollars  (relative to such Lender,  its
     "Term B Loan") to the Borrower  equal to such Lender's  Term  Percentage of
     the  aggregate  amount of the  Borrowing  of Term B Loans  requested by the
     Borrower  to be made on such  day.  The  Commitment  of each  Term B Lender
     described in this Section  2.1.1 is herein  referred to as its "Term B Loan
     Commitment".  On the Term B Commitment  Termination  Date,  the Term B Loan
     Commitment shall  terminate,  and any portion of the Term B Loan Commitment
     Amount that is not borrowed on such date shall be extinguished.  No amounts
     paid or prepaid with respect to Term B Loans may be reborrowed.

     (d) Section  2.1.2 of the Credit  Agreement is hereby  amended by inserting
the following sentence immediately following the first sentence thereof:

     "The Commitment of each Revolving Lender described in this Section 2.1.2 to
     make  Revolving  Loans  is  herein  referred  to  as  its  "Revolving  Loan
     Commitment".

     (e) Clause (a) of Section 2.2.2 of the Credit  Agreement is hereby  amended
by inserting the phrase "(other than  Incremental  Dedicated  Assets)" after the
words  "Dedicated  Assets" in the  fourth  line  thereof  and by  replacing  the
reference therein to Section 8.2.10(b) with a reference to Section 8.2.10(c).

     (f) Clause (e) of Section 3.1.1 of the Credit  Agreement is hereby  amended
and restated in its entirety to read as follows:

          "(e) shall,  upon the receipt of Net Available Cash from an Asset Sale
     of any  Incremental  Dedicated  Asset,  make a written  offer to the Term B
     Lenders to prepay the Term B Loans (and  reduce the Term B Loan  Commitment
     Amount)  by an  amount  equal to one  hundred  percent  (100%)  of such Net
     Available Cash; provided, however, that the Borrower may, at its discretion
     retain (and as a  consequence  of such  retention,  there shall be excluded
     from such mandatory  offer) up to an aggregate of  $300,000,000 of such Net
     Available  Cash from the sale of  uninstalled  turbines and  equipment  and
     provided,  further, that the Borrower may, at its discretion retain (and as
     a  consequence  of such  retention,  there  shall  be  excluded  from  such
     mandatory  offer) an additional  amount of such Net Available Cash equal to
     (w) the Net  Available  Cash  from  the  sale  of the De  Pere  project  in
     Wisconsin and of the Borrower's  minority  interest in the Lockport  energy
     project  in New York  plus (x) the Net  Available  Cash  realized  from the
     transactions  described  in Section C1 of Schedule  III (other than any Net
     Available Cash realized from any transaction  among or between the Borrower
     and any  Affiliates  thereof  or among  or  between  any of the  Borrower's
     Affiliates)  plus (y) the Available  Investment  and Lease Basket minus the
     aggregate amount of all obligations of each Incremental Subsidiary and each
     Subsidiary  thereof permitted by clause (y) of the last sentence of Section
     8.2.3 and then outstanding,  to the extent (and only to the extent) that an
     amount equal to such retained Net Available Cash is reinvested (i) in power
     projects  directly owned by the Borrower or a Dedicated  Subsidiary or (ii)
     in oil or gas  reserves  directly  owned  by the  Borrower  or a  Dedicated
     Subsidiary  within  365  days of such  asset  sale.  Such  offer  shall  be
     transmitted by facsimile and by overnight courier to each Term B Lender and
     shall be deemed  received on the Business Day following  transmittal.  Each
     Term B Lender shall have three  Business Days following its receipt of such
     offer to submit a written response to the Borrower's  prepayment offer, and
     if any Term B Lender  shall not have  responded by the close of business on
     the third  Business  Day, it shall be deemed to have  accepted  such offer.
     Payment  shall  be  made to all  Term B  Lenders  that  have  accepted  the
     prepayment  offer on the fourth Business Day following their receipt of the
     offer from the Borrower.  If any Term B Lender elects not to accept its pro
     rata share of the  proceeds  from a  particular  Asset Sale of  Incremental
     Dedicated  Assets,  such  proceeds  shall be applied to ratably  prepay the
     Revolving Loans and the loans under the Existing Credit Agreement  (without
     any  corresponding  reduction  of  the  Revolving  Commitment  Amount,  the
     Revolving Loan  Commitments or the  commitments  under the Existing  Credit
     Agreement).  Upon  the  repayment  in full  of all  Term B  Loans,  all Net
     Available  Cash from any Asset  Sale of any  Incremental  Dedicated  Assets
     shall be applied to ratably prepay the Revolving  Loans and the loans under
     the Existing Credit Agreement  (without any corresponding  reduction of the
     Revolving   Commitment  Amount,  the  Revolving  Loan  Commitments  or  the
     commitments  under the Existing Credit  Agreement).  Upon the conversion of
     any non-cash proceeds realized from any Asset Sale of Incremental Dedicated
     Assets  (whether  received by the Borrower or any  Subsidiary) to cash, the
     principal  amount  of such  cash  proceeds  and any  interest  attributable
     thereto shall be deemed to be Net Available Cash from Incremental Dedicated
     Assets and applied by the Agent as provided in this clause (e);

     (g) Clause (f) of Section 3.1.1 of the Credit  Agreement is hereby  amended
by inserting the phrase "(other than  Incremental  Dedicated  Assets)" after the
words "Dedicated  Assets" and by replacing the period at the end thereof with ";
and".

     (h)  There  shall be added to the  Credit  Agreement  a new  clause  (g) to
Section 3.1.1 reading in its entirety as follows:

          "(g)  shall,  if a debt  rating of BB- or better has not been given to
     the Loans by S&P on or before  May 30,  2002,  prepay all Term B Loans then
     outstanding on June 1, 2002."

     (i)  The  reference  in the  final  sentence  of  Section  4.5 to  "Section
8.2.10(b)(iii)"  is hereby  deleted and a reference  to "Section  8.2.10(c)"  is
substituted therefor.

     (j) Section 6.2 of the Credit  Agreement is hereby  amended and restated in
its entirety to read as follows:

          SECTION 6.2.  Term B Loan  Borrowing.  The  obligations  of the Term B
     Lenders to fund each  Borrowing of the Term B Loans shall be subject to the
     prior or concurrent  satisfaction  of each of the conditions  precedent set
     forth in this Section  6.2;  provided,  that on the Term B Loan  Commitment
     Termination Date, the Term B Loan Commitments shall expire.

     (k)  Subsection  (a) of  Section  6.3.1 of the Credit  Agreement  is hereby
amended and restated in its entirety to read as follows:

          (a) the  representations  and  warranties  set  forth in  Article  VII
     (excluding, however, those contained in Section 7.7) and in each other Loan
     Document  (excluding  the  representations  and warranties set forth in the
     Deeds of Trust except to the extent that a breach thereof would  reasonably
     be expected to cause a Material  Adverse  Effect) shall be true and correct
     in all  material  respects  with the same  effect as if then  made  (unless
     stated  to  relate   solely  to  an  early   date,   in  which   case  such
     representations and warranties shall be true and correct as of such earlier
     date);

     (l) Clause (c) of Section 8.1.1 of the Credit  Agreement is hereby  amended
by adding the  following  clause  immediately  prior to the end thereof:  "and a
certificate,  executed  by an  Authorized  Officer  of the  Borrower,  showing a
computation of the amounts described in clauses (w), (x) and (y) and subsections
(i) and (ii) of Section 3.1.1(e) and in clauses (x) and (y) of the last sentence
of Section 8.2.3 as of the end of such period."

     (m) Section 8.1.4 of the Credit Agreement is hereby amended and restated in
its entirety to read as follows:

          Section 8.1.4 Insurance.

          (a) Except as provided in Section  8.1.4(b),  the Borrower  will,  and
     will cause each of its  Subsidiaries to, maintain or cause to be maintained
     with  responsible   insurance  companies  insurance  with  respect  to  its
     properties and business (including business interruption insurance) against
     such casualties and  contingencies and of such types and in such amounts as
     is customary in the case of similar  businesses  and will,  upon request of
     the Agent,  furnish to each Lender at reasonable intervals a certificate of
     an Authorized  Officer of the Borrower  setting forth the nature and extent
     of all  insurance  maintained  by the  Borrower  and  its  Subsidiaries  in
     accordance with this Section.

          (b) With respect to the Domestic Gas Reserves,  the Borrower will, and
     will cause each of its  Subsidiaries to, maintain or cause to be maintained
     the insurance required by the Deeds of Trust.

     (n) Section  8.1.10 of the Credit  Agreement is hereby amended and restated
in its entirety to read as follows:

          SECTION  8.1.10.  Intercompany  Notes.  On or  before  the  tenth  day
     following the initial funding of Term B Loans, the Borrower shall cause all
     Indebtedness  then  owing  from  any of its  Dedicated  Subsidiaries  to be
     evidenced  by a  non-recourse  secured  promissory  note and pledged to the
     Agent,  pursuant to the Note Pledge Agreement,  as collateral  security for
     the Obligations,  and the Borrower will,  promptly upon the creation of any
     additional  Indebtedness owing from any of its Dedicated  Subsidiaries that
     has not been evidenced by a non-recourse secured note pledged to the Agent,
     cause such Indebtedness to be evidenced by a promissory note and pledged to
     the Agent,  pursuant to the Note Pledge Agreement,  as collateral  security
     for the  Obligations.  It is  understood  and  agreed  that  (i)  upon  the
     conversion to equity of all Indebtedness owing from a Dedicated  Subsidiary
     to the  Borrower  or the  repayment  of all  Indebtedness  from a Dedicated
     Subsidiary  to  the  Borrower,   the  promissory  note  of  such  Dedicated
     Subsidiary  shall be released from the Note Pledge  Agreement and cancelled
     and (ii)  subject  to the  approval  of the Agent  (not to be  unreasonably
     withheld),  the Borrower may substitute new non-recourse secured promissory
     notes for promissory notes  previously  pledged to the Agent. If all of the
     Indebtedness  owing from a Dedicated  Subsidiary  to the Borrower  shall be
     converted to equity,  not later than ten days thereafter the Borrower shall
     pledge to the Agent such equity interest and deliver to the Agent the stock
     certificate,  if any,  evidencing such interest together with duly executed
     stock powers, in blank.

     (o) Section  8.1.11 of the Credit  Agreement is hereby amended and restated
in its entirety to read as follows:

          SECTION 8.1.11 Ownership  Interests.  CNGH shall at all times directly
     or indirectly  own 100% of all equity  interests of CCEC,  which shall,  in
     turn,  directly or indirectly  own 100% of the equity  interests in Calpine
     Canada Natural Gas  Partnership  and Calpine  Saltend  Energy Centre,  PLC.
     Calpine  Canada Natural Gas  Partnership  shall at all times own all of the
     Canadian  Gas  Reserves.  The  Borrower  shall at all times own 100% of the
     equity  interests  of  CNGH.  After  the  completion  of  the  transactions
     described in Section 8.1.9,  CNGH shall at all times own 100% of the equity
     interests of Calpine Holdings. Calpine Holdings shall at all times own 100%
     of the equity interests of CCFCI.

     (p) There  shall be added to the  Credit  Agreement  a new  Section  8.1.12
reading in its entirety as follows:

          SECTION 8.1.12 Incremental  Domestic Gas Reserves.  The Borrower shall
     cause all  acquisitions  of additional  Domestic Gas Reserves  after May 1,
     2002 to be made by the Borrower or by a Dedicated Subsidiary.

     (q) Clause (a) of Section 8.2.2 of the Credit  Agreement is hereby  amended
by  adding  the  following  immediately  prior  to the  end  thereof:  "and  any
Indebtedness  evidenced by promissory notes pledged to the Agent pursuant to the
Note Pledge Agreement".

     (r) Clause (e) of Section 8.2.2 of the Credit  Agreement is hereby  amended
and restated in its entirety to read as follows:

          "(e) Indebtedness of one or more Subsidiaries of the Borrower incurred
     solely to finance the development, construction or purchase of, or repairs,
     expansions,  enhancements,  improvements or additions to, the assets of one
     or  more  Subsidiaries  so long as (i) the  principal  amount  of any  such
     Indebtedness  (x) for  development of existing gas reserves does not exceed
     an  aggregate  of  $50,000,000  for any such  existing  reserves or (y) for
     expansions,  enhancements,  improvements  or additions to an existing asset
     which  has  already  achieved  commercial  operation  does  not  exceed  an
     aggregate  of  $60,000,000  for any single  financing  or series of related
     financings for such asset  (exclusive of up to $250,000,000 of Indebtedness
     for the expansion of the energy center at Zion, Illinois) and (ii) recourse
     for any such  Indebtedness  is  limited  solely  (A) to the asset or assets
     being  financed  or  to  the  assets  of  CES,  (B)  to  such  Subsidiaries
     themselves,  where the asset or assets  being  financed  constitute  all or
     substantially  all of the  assets of such  Subsidiaries  (each,  a "Special
     Purpose  Subsidiary"),  and/or (C) to the stock or other direct or indirect
     ownership interests in such Special Purpose Subsidiaries;"

     (s) The  penultimate  sentence of Section 8.2.2 of the Credit  Agreement is
hereby  amended by adding the  following  proviso  immediately  prior to the end
thereof:

     "and  provided  further  that in no event  shall  any  Incremental  Pledged
     Subsidiary or any  Subsidiary  thereof incur any  Indebtedness  of the type
     permitted by clause (f) of this Section 8.2.2 after May 1, 2002."

     (t) The last  sentence of Section  8.2.3 of the Credit  Agreement is hereby
amended by adding the following clause immediately prior to the end thereof:

     "and in no event shall any Incremental Pledged Subsidiary or any Subsidiary
     thereof  create  any  Liens of the type  permitted  by  clause  (m) of this
     Section 8.2.3 after May 1, 2002 other than (x) Liens incurred in connection
     with  transactions  described  in Section C1 of Schedule  III and (y) Liens
     securing  obligations  to  the  extent  of  the  Available  Investment  and
     Leaseback  Basket  minus the  aggregate  amount  retained  by the  Borrower
     pursuant to clause (y) of the second proviso of the carry-over  sentence in
     Section 3.1.1(e)."

     (u)  Subsection  (c) of  Section  8.2.5 of the Credit  Agreement  is hereby
amended by adding  the  following  immediately  prior to the end  thereof:  "and
Investments  by the  Borrower  of the assets of CES in Persons  that are neither
Subsidiaries  of the Borrower nor  Investment  Joint Ventures of the Borrower in
connection  with  the  establishment  of a  trading  joint  venture  or  similar
arrangement".

     (v) Subsection  (i) of clause (b) of Section 8.2.6 of the Credit  Agreement
is hereby amended and restated in its entirety to read as follows:

          (i) make any  payment  or  prepayment  of  principal  of,  or make any
     payment of interest  on, any Senior Notes or any  Subordinated  Debt on any
     day other than the stated date for such payment or prepayment  set forth in
     the  documents  and  instruments  memorializing  any  Senior  Notes or such
     Subordinated  Debt, or which would violate the subordination  provisions of
     any such  Subordinated  Debt;  provided,  that the  Borrower  may so pay or
     prepay all or a portion of the Senior  Notes if either (A) both  before and
     after  giving  effect  thereto,  no  Default  shall  have  occurred  or  be
     continuing and there are no Loans outstanding  hereunder or (B) both before
     and after giving  effect  thereto,  no Default  shall have  occurred and be
     continuing  and the  aggregate  amount  of all such  prepayments  shall not
     exceed 50% of aggregate Net Equity  Proceeds  received by the Borrower from
     and after March 8, 2002.

     (w)  Subsection  (b) of  Section  8.2.9 of the Credit  Agreement  is hereby
amended by adding the following proviso at the end thereof:

     "provided,  further,  that if any Dedicated Subsidiary shall merge with any
     other Subsidiary,  such Dedicated Subsidiary shall be the continuing Person
     following  such  merger;  and  provided  further,  that  if  any  Dedicated
     Subsidiary shall liquidate or dissolve voluntarily into, or merge into, the
     Borrower, the assets or stock of such Dedicated Subsidiary shall be pledged
     by the  Borrower  as  collateral  security  for  the  Obligations  and  the
     obligations of the Borrower under the Existing Credit Agreement".

     (x)  Subsection  (d) of  Section  8.2.9 of the Credit  Agreement  is hereby
amended by deleting the period at the end thereof and by adding the following at
the end of such subsection:

     "provided,  however,  that if any Dedicated Subsidiary shall merge with any
     Restricted  Subsidiary that is not a Dedicated  Subsidiary,  such Dedicated
     Subsidiary shall be the continuing Person following such merger; and

     (y) Section  8.2.9 of the Credit  Agreement  is hereby  further  amended by
adding a new subsection (e) thereto as follows:

          "(e) a Subsidiary may consolidate with, or merge into or with, another
     Person to the extent otherwise permitted under Section 8.2.10."

     (z) Section  8.2.10 of the Credit  Agreement is hereby amended and restated
in its entirety to read as follows:

          SECTION 8.2.10.  Asset  Dispositions,  etc. The Borrower will not, and
     will  not  permit  any of  its  Subsidiaries  to,  sell,  transfer,  lease,
     contribute or otherwise convey, or grant options,  warrants or other rights
     with  respect  to, all or any  substantial  part of its  assets  (including
     accounts  receivable and capital stock of Subsidiaries) to any Person other
     than to the Borrower or a Restricted Subsidiary, unless

          (a) such sale, transfer,  lease,  contribution or conveyance is (i) in
     the ordinary  course of its  business,  (ii)  permitted by Section 8.2.9 or
     (iii) of CES or its Subsidiaries or any of their respective assets; or

          (b)  in  the  event  such  sale,  transfer,   lease,  contribution  or
     conveyance involves the Domestic Gas Reserves, such sale, transfer,  lease,
     contribution  or conveyance  is,  individually  and taken together with all
     prior sales,  transfers,  leases,  contributions or conveyances  within the
     same calendar year, a Permitted Sale; or

          (c) such sale,  transfer,  lease,  contribution  or  conveyance is not
     covered by clauses (a) or (b) above and (i) the Borrower or its  Subsidiary
     receives  consideration  at  the  time  of  such  sale,  transfer,   lease,
     contribution  or  conveyance  at least  equal to the fair  market  value of
     assets being sold,  transferred,  leased,  contributed or conveyed, (ii) at
     least sixty percent (60%) of the consideration  received by the Borrower or
     such  Subsidiary is in the form of cash or cash  equivalents,  (iii) in the
     case of any such sale,  transfer,  lease,  contribution  or conveyance by a
     Subsidiary that is not an Incremental Pledged  Subsidiary,  an amount equal
     to 100% of Net Available Cash therefrom is either  reinvested in Additional
     Assets of a  Dedicated  Subsidiary  within  365 days of such  Asset Sale or
     applied  by the  Borrower  as  provided  herein to prepay the Loans and the
     loans outstanding  under the Existing Credit Agreement,  so long as any Net
     Available  Cash from  Dedicated  Assets (other than  Incremental  Dedicated
     Assets) is applied by the Borrower as provided in Section 2.2.2 and (iv) in
     the case of any such sale, transfer,  lease,  contribution or conveyance by
     an Incremental Pledged Subsidiary, an amount equal to 100% of Net Available
     Cash therefrom is applied by the Borrower as provided in Section 3.1.1(e).

     (aa)  There  shall be added to the  Credit  Agreement  a new  Section  10.9
reading in its entirety as follows:

          SECTION 10.9 Collateral Matters. The Lenders irrevocably authorize the
     Agent,  at its option  and in its  discretion,  to release  any Lien on any
     property  granted to or held by the Agent under any Loan  Document (i) upon
     termination  of the  Commitments  and  payment  in full of all  Obligations
     (other than contingent  indemnification  obligations) and the expiration or
     termination  of all  Letters of Credit,  (ii) that is sold or to be sold as
     part of or in  connection  with any sale  permitted  hereunder or under any
     other  Loan  Document,  or (iii)  subject  to Section  11.1,  if  approved,
     authorized or ratified in writing by the Required Lenders.  Upon request by
     the Agent at any time,  the  Required  Lenders  will  instruct the Agent to
     release its interest in particular types or items of property,  pursuant to
     this Section 10.9.

     (bb) Clause (g) of Section 11.1 of the Credit  Agreement is hereby  amended
and restated in its entirety to read as follows:

          "(g)  release any Lien created by a Loan  Document  shall be effective
     without the consent of Lenders  having at least 75% of the aggregate of all
     Term B Loans then outstanding,  all unfunded Term B Loan  Commitments,  all
     Revolving Loans then outstanding, all Letter of Credit Outstandings on such
     date,  and all unfunded  Revolving  Loan  Commitments,  except that no such
     consent shall be required to the extent that the sale or other  disposition
     of the asset  subject to the Lien is permitted  hereunder  and the proceeds
     thereof are applied as required by this Agreement;"

     (cc) Item 7.12  ("Environmental  Matters")  of the  Disclosure  Schedule is
hereby amended by adding thereto those items set forth on Schedule 7.12 attached
hereto.

     (dd) There shall be added to the Credit Agreement a new Schedule 1.1 in the
form of Schedule 1.1 attached hereto.

     (ee) There shall be added to the Credit Agreement a new Schedule III in the
form of Schedule III attached hereto.

     SECTION  3. By their  execution  hereof,  each of the  undersigned  Lenders
hereby waives the  conditions  precedent set forth in Section  6.2.1,  6.2.4 and
6.2.5 of the Credit  Agreement with respect to the initial funding of the Term B
Loans to the extent,  but only to the extent,  that that such funding shall have
occurred on or before May 10, 2002.  If the initial  funding of the Term B Loans
shall not have  occurred by May 10,  2002,  the  waivers  granted  herein  shall
terminate at 12:00 midnight, eastern daylight time, on such date.

     SECTION 4. To induce the  Lenders  and the  Administrative  Agents to enter
into this Amendment,  the Company hereby reaffirms,  as of the date hereof,  its
representations and warranties  contained in Article VII of the Credit Agreement
(except to the extent such  representations  and warranties  relate solely to an
earlier  date) and  additionally  represents  and  warrants as follows:  (i) The
execution and delivery of this Amendment,  and the performance by the Company of
its obligations hereunder,  are within the Company's corporate powers, have been
duly   authorized  by  all  necessary   action,   have  received  all  necessary
governmental  approval  (if any  shall  be  required),  and do not and  will not
contravene or conflict with any provision of law or of the charter or by-laws of
the Company or of any agreement binding upon the Company;

          (ii) As of the date of this  Amendment,  the  Company  owns all of the
     equity  interests  in  Calpine  Holdings  and CNGH and CNGH owns all of the
     equity interests in CNGC;

          (iii) This Amendment is the legal, valid and binding obligation of the
     Company enforceable against the Company in accordance with its terms; and

          (iv) No Default has  occurred  and is  continuing  and no Default will
     result from the execution and delivery of this Amendment.

     SECTION 5. The  effectiveness of this Amendment is conditioned upon receipt
by the Administrative  Agents of all the following  documents,  each in form and
substance satisfactory to the Administrative Agents:

          (i) This  Amendment  duly  executed by the  Company  and the  Required
     Lenders;

          (ii) The First Amendment Pledge Agreements duly executed and delivered
     by the  Company  to pledge  the  shares of the  corporations  described  on
     Section A of Schedule III owned by the Company and the membership interests
     of CNGH and the other limited liability companies described on Section A of
     Schedule III owned by the Company;

          (iii)  Documentation  sufficient to satisfy the  Administrative  Agent
     that the corporate reorganization described on Schedule 1.1 is complete;

          (iv)  The  Agent  shall  have  received  confirmation  that all of the
     Domestic Gas Reserves shall have been  transferred to the Borrower and that
     the other  requirements  of Section  8.1.8 shall have been  satisfied on or
     before the date of the requested Borrowing;

          (v) The Note Pledge  Agreement duly executed by the Borrower to pledge
     the intercompany notes described in Section 8.1.10 of the Credit Agreement;

          (vi)  The  Agent  and  Term  B  Lead  Arrangers  shall  have  received
     confirmation  that the debt  rating  given to the  Loans and then in effect
     from Moody's shall be Ba3 or better;

          (vii) The Agent shall have  received  opinions,  dated the date of the
     Effective  Date and  addressed  to the  Agent  and all  Lenders,  from Lisa
     Bodensteiner,  Esq.,  general  counsel of the  Borrower,  and  Covington  &
     Burling,  special  counsel to the  Borrower,  substantially  in the form of
     Exhibits B-1 and B-2; and

          (viii) The Agent  shall have  received  such  other  documents  as the
     Administrative Agents shall have reasonably requested.

     SECTION 6. This Amendment  shall be deemed to be an amendment to the Credit
Agreement,  and the Credit  Agreement,  as amended hereby,  is hereby  ratified,
approved and confirmed in each and every  respect.  All references to the Credit
Agreement  in  any  other  document,  instrument,  agreement  or  writing  shall
hereafter be deemed to refer to the Credit Agreement as amended hereby.

     SECTION  7.  Unless  otherwise  defined  herein  or the  context  otherwise
requires,  terms used in this  Amendment,  including  its preamble and recitals,
have the meanings provided in the Credit Agreement.

     SECTION 8. THIS  AMENDMENT  SHALL BE A CONTRACT  MADE UNDER AND GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK. All
obligations  of the Company  and rights of the  Lenders  and the  Administrative
Agents  expressed  herein shall be in addition to and not in limitation of those
provided by applicable law.  Whenever  possible each provision of this Amendment
shall  be  interpreted  in  such  manner  as to be  effective  and  valid  under
applicable law, but if any provision of this Amendment shall be prohibited by or
invalid under  applicable law, such provision shall be ineffective to the extent
of such  prohibition or invalidity,  without  invalidating the remainder of such
provision or the remaining provisions of this Amendment.

     SECTION 9. This  Amendment  may be executed in any number of  counterparts,
all of which taken together shall  constitute one and the same  instrument,  and
any party hereto may execute this Amendment by signing one or more counterparts.

     SECTION 10. This Amendment  shall be binding upon the Company,  the Lenders
and the Administrative  Agents and their respective  successors and assigns, and
shall inure to the benefit of the  Company,  the Lenders and the  Administrative
Agents and the  successors  and assigns of the  Lenders  and the  Administrative
Agents.

     SECTION 11. THE COMPANY HEREBY  KNOWINGLY,  VOLUNTARILY  AND  INTENTIONALLY
WAIVES  ANY RIGHT TO A TRIAL BY JURY IN ANY ACTION OR  PROCEEDING  TO ENFORCE OR
DEFEND  ANY RIGHTS  UNDER THIS  AMENDMENT  OR UNDER ANY  AMENDMENT,  INSTRUMENT,
DOCUMENT  OR  AGREEMENT  DELIVERED  OR WHICH MAY IN THE FUTURE BE  DELIVERED  IN
CONNECTION  HEREWITH  OR  ARISING  FROM ANY  BANKING  RELATIONSHIP  EXISTING  IN
CONNECTION  WITH THIS  AMENDMENT,  AND AGREES THAT ANY SUCH ACTION OR PROCEEDING
SHALL BE TRIED BEFORE A COURT AND NOT BEFORE A JURY.






     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Amendment to be
executed by their  respective  officers  thereunto duly authorized as of the day
and year first above written.

                                         CALPINE CORPORATION


                                         By:____________________________________
                                         Name:__________________________________
                                         Title:_________________________________


                                         THE BANK OF NOVA SCOTIA, as
                                         Administrative Agent and Lender


                                         By:____________________________________
                                         Name:__________________________________
                                         Title:_________________________________


                                         CITICORP USA, INC.,
                                         as Administrative Agent and Lender


                                         By:____________________________________
                                         Name:__________________________________
                                         Title:_________________________________


                                         BAYERISCHE LANDESBANK GIROZENTRALE


                                         By:____________________________________
                                         Name:__________________________________
                                         Title:_________________________________


                                         By:____________________________________
                                         Name:__________________________________
                                         Title:_________________________________


                                         BANK OF AMERICA, NATIONAL ASSOCIATION.


                                         By:____________________________________
                                         Name:__________________________________
                                         Title:_________________________________


                                        CREDIT SUISSE FIRST BOSTON, CAYMAN
                                        ISLANDS BRANCH


                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________


                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________


                                        TORONTO DOMINION (TEXAS) INC.


                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________


                                        DEUTSCHE BANK TRUST COMPANY AMERICAS


                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________


                                        ING CAPITAL LLC


                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________


                                        By:_____________________________________
                                        Name:___________________________________
                                        Title:__________________________________



                                                                    SCHEDULE 1.1

                                     STEP 1

                               Calpine Corporation
                                   ("Calpine")



         1,000 Shares of                                         1,000 Shares of
           Common Stock                                            Common Stock


                  Calpine Natural                       Calpine Natural
                    Gas GP, Inc.,                      Gas Holdings, Inc.
                  ("Calpine GP")                         ("Holdings")


         1% GP Interest                                          99% LP Interest



                        Calpine Natural Gas Company, L.P.
                                    ("CNGC")



CNGC will convert from a Delaware limited partnership to a Delaware  corporation
("Conversion  #1") and will  change its name to  Calpine  Natural  Gas  Company.
Conversion #1 will be effective at 11:57 p.m.,  Eastern Time ("ET"), on the date
of the Conversion (the  "Conversion  Date").  By virtue of Conversion #1, the 1%
general  partner  interest  (the "GP  Interest")  held by Calpine GP and the 99%
limited partner  interest (the "LP Interest") held by Holdings will be converted
into 10 shares of common stock and 990 shares of common  stock in the  converted
corporation, respectively.








                                     STEP 2

                                     Calpine




         1,000 Shares of                                         1,000 Shares of
           Common Stock                                            Common Stock



                  Calpine GP                            Holdings



         10 Shares of                                              990 shares of
         Common Stock                                              Common Stock



                                      CNGC



Holdings  will  convert  from  a  Delaware  corporation  to a  Delaware  limited
liability company  ("Conversion #2") and will change its name to Calpine Natural
Gas Holdings,  LLC.  Conversion  #2 will be effective at 11:57 p.m.,  ET, on the
Conversion  Date. By virtue of  Conversion  #2, the 1,000 shares of common stock
held by  Calpine  (the  "Holdings  Stock")  will be  converted  into 100% of the
limited  liability  company  interest  in the  converted  LLC  (the  "Membership
Interest").








                                     STEP 3

                                     Calpine




             100%                                                   100%
         Common Stock                                        Membership Interest

                                    Merger #1

                  Calpine GP                            Holdings



         10 Shares of                                              990 shares of
         Common Stock                                              Common Stock



                                      CNGC



Calpine  GP will  merge  with and  into  Calpine  ("Merger  #1"),  with  Calpine
acquiring in Merger #1 the 10 shares of CNGC stock held by Calpine GP. Merger #1
will be effective at 11:58 p.m., ET, on the Conversion Date.








                                     STEP 4

                                     Calpine




         10 Shares of                                               100%
         Common Stock                                        Membership Interest

                                      Stock
                                  Distribution

                                                        Holdings



                                                                   990 shares of
                                                                   Common Stock



                                      CNGC



To avoid having to obtain Calpine stockholder  approval for Merger #2 in Step 5,
Holdings  will  distribute  its 990 shares of CNGC stock to  Calpine.  The stock
distribution will be effective at 11:58 p.m., ET, on the Conversion Date.








                                     STEP 5

                                     Calpine


                                    Merger #2


         1,000 Shares of                                            100%
           Common Stock                                      Membership Interest




                  CNGC                                  Holdings



In order to move the assets held by CNGC to Calpine by  operation  of law rather
than assignment,  CNGC will merge with and into Calpine ("Merger #2"). Merger #2
will be effective at 11:59 p.m., ET, on the Conversion Date.







                                     STEP 6

                                                        Calpine




                                      100%
                                   Membership
                                    Interest




                                                        Holdings



Calpine Corporation will enter into the 2002 credit  restructuring,  under which
it will  mortgage  the assets it receives  from  Calpine  Natural Gas Company in
Merger #2.



                                                                    SCHEDULE III

A.   Direct Subsidiaries to be pledged.

     1.   Calpine CCFC II Holdings, Inc.
     2.   Calpine Central, Inc.
     3.   Calpine Eastern Corporation
     4.   Calpine Dighton, Inc.
     5.   CPN Auburndale, Inc.
     6.   Calpine Auburndale, Inc.
     7.   Calpine Gordonsville, Inc.
     8.   Calpine Rumford, Inc.
     9.   Calpine Rumford I, Inc.
     10.  Calpine Tiverton, Inc.
     11.  Calpine Tiverton I, Inc.
     12.  Calpine Northeast Marketing, Inc.
     13.  Calpine Marketing, LLC
     14.  Venture Acquisition Company
     15.  Calpine Northbrook Energy Corporation of Maine, Inc.
     16.  Androscoggin Energy, Inc.
     17.  Calpine Project Holdings, Inc.
     18.  Calpine Sumas, Inc.
     19.  Northwest Cogeneration, Inc.
     20.  Calpine King City 1, Inc.
     21.  Calpine King City 2, Inc.
     22.  Calpine Gilroy 1, Inc.
     23.  Calpine Gilroy 2, Inc.
     24.  Sutter Dryers, Inc.
     25.  Anacapa Land Company LLC
     26.  Calpine Metcalf EPC, Inc.
     27.  Goldendale Energy, Inc.
     28.  CPN MEC Holdings, LLC
     29.  Bellingham Cogen, Inc.
     30.  GATX/Calpine-Agnews, Inc.
     31.  Calpine Agnews, Inc.
     32.  Calpine Pittsburgh, LLC
     33.  CPN Blue Spruce Holdings, LLC
     34.  Calpine Power Company
     35.  Calpine Vapor, Inc.
     36.  Modoc Power, Inc.
     37.  Santa Rosa Energy Company
     38.  Geysers Finance Company
     39.  Calpine Thermal Power, Inc.
     40.  Calpine Calistoga Holdings, LLC
     41.  Calpine Operations Management Company, Inc.
     42.  Calpine Fuels Corporation
     43.  CPN Pipeline Company
     44.  Calpine Sonoran Pipeline LLC
     45.  Calpine c*Power, Inc.
     46.  WRMS Engineering, Inc.
     47.  Calpine  Cogeneration  Corporation  (80%  ownership  interest)  -- see
          Section B below
     48.  Chippokes Energy Center, LLC
     49.  Palmetto Energy Center, LLC
     50.  Warnerville Energy Center, LLC
     51.  CPN Cascade, Inc.
     52.  CPN Telephone Flat, Inc.
     53.  Anderson Springs Energy Company
     54.  Calpine Sonoma, Inc.
     55.  South Point Energy Center LLC
     56.  Los Esteros Critical Energy Center, LLC
     57.  Calpine California Holdings, Inc.
     58.  Calpine Eastern Holdings, Inc.

B.   Restrictions   on  Calpine   Corporation's   Ability  to  Pledge.   Calpine
     Cogeneration   Corporation   -  pledge   of   shares   comprising   Calpine
     Corporation's  80%  ownership  interest  would require prior consent of the
     owner of the shares  comprising  the  remaining  20% interest  (NRG);  such
     consent is not to be unreasonably withheld.  Calpine shall use commercially
     reasonable  efforts to obtain  such  consent  and pledge its 80%  ownership
     interest  and shall,  in any event,  execute such pledge  documentation  by
     December 20, 2002.

C.   Subsidiaries that may be released.

     1.   To the  extent  the shares  (or other  indicia  of  ownership)  of the
          following  Subsidiaries have been pledged by the Company,  such shares
          will be released upon the  completion  of financing or  sale/leaseback
          transactions   in   connection   with  the  projects   owned  by  such
          Subsidiaries:

          CPN Acadia,  Inc.,  subsidiary  of Calpine  Central,  Inc. Zion Energy
          Center LLC, subsidiary of Calpine CCFCII Holdings,  Inc. Calpine Oneta
          Power, LP,  subsidiary of Calpine CCFCII  Holdings,  Inc. Calpine King
          City Cogen,  LLC,  subsidiary of Calpine King City 1, Inc. and Calpine
          King City 2, Inc. Calpine California Holdings,  Inc. Auburndale Peaker
          Energy Center,  LLC,  subsidiary of Calpine Eastern Corp. CPN Bethpage
          3rd Turbine, Inc., subsidiary of Calpine Eastern Corp.

          It is understood  that the shares of the foregoing  Subsidiaries  may,
          with prior written notice to the Administrative Agents, be transferred
          to another Incremental Pledged Subsidiary to facilitate the completion
          of any such financing or sale/leaseback transaction.

     2.   The shares of Calpine GP, Inc. (general partner of Calpine Natural Gas
          Company LP) will be released  upon the closing of the First  Amendment
          to the Credit Agreement.

     3.   The shares of Calpine Natural Gas Holdings,  Inc.  (limited partner of
          Calpine Natural Gas Company,  LP) will be released upon the closing of
          the First Amendment to the Credit Agreement.

     4.   On or before June 8, 2002,  the stock of Calpine CCFC  Holdings,  Inc.
          shall be transferred to Calpine Natural Gas Holdings, LLC.



                                                                   SCHEDULE 7.12




     1.  Alvin,  Texas -- A  horizontal  separator  tank  ruptured in July 2001,
resulting  in a  personal  injury  claim  filed by  Alonzo  Cruz,  one of the GT
Oilfield Repair employees injured in the incident.  Named Defendants are Calpine
Natural  Gas Company  L.P.  and Dickey Cox (d/b/a Cox  Gauging  Service).  It is
alleged  that Cox was  negligent  in the  operation  of a pressure  valve at the
facility,  and that Calpine  Natural Gas Company L.P.  failed to maintain a safe
work  environment.  Both GT  Oilfield  Repair and Cox Gauging  were  independent
contractors at the site.  Calpine Natural Gas Company L.P. is being defended and
indemnified by GT Oilfield Repair,  pursuant to a contractual indemnity. At this
juncture,  there is no workers'  compensation  lien against  Calpine Natural Gas
Company L.P.

     Mortgagor  has to date  spent  $600,000  total on this  site  ($300,000  on
replacement  of damaged  equipment  and $300,000 on  environmental  containment,
removal,  and  remediation).  There is a gas well that is currently shut-in that
needs to be  redrilled  (estimated  cost  $1,000,000)  or plugged and  abandoned
(estimated  cost  $200,000).  The  property  itself is  bordered on two sides by
residential areas.

     2. ARCO plant site,  South Texas -- This property was acquired by Mortgagor
pursuant  to an  acquisition  of  Pioneer  assets.  Mortgagor  has to date spent
$180,000 to remediate the contaminated soil and pond water, with the possibility
of an additional $70,000 needed to complete the work.

     3.  Westfield,  New York -- This  involves  a 2500 sq. ft  tract,  to which
Mortgagor   holds  title.   The  estimated  cost  to  excavate  and  remove  the
contaminated soil is $25,000. Mortgagor will then attempt to sell the remediated
tract to the buyer that previously  purchased the surrounding  property from TGX
(n/k/a Mortgagor).

     4. West Drakes Bay,  Louisiana --  Mortgagor  is currently in  negotiations
with a potential buyer for this property,  which is currently not producing.  If
the  property  is not sold,  there will be  plugging  and  abandonment  costs of
approximately $200,000 for the well and platform.

     5. San Juan  Basin,  New  Mexico --  Mortgagor  acquired  some open pits in
connection with an acquisition from Robert L. Bayless Producer, LLC. This should
be resolved  completely in the near future for a minimal amount.  The bedrock in
the  area  is  close  to the  surface,  with  the  result  that  the  borderline
contamination  is well  contained.  Mortgagor  has the  full  support  of  local
environmental authorities.

     6. Rio Vista Field,  California  -- Schuler  Homes has made a claim against
Mortgagor for excavation and disposal of contaminated soil near an old open sump
pit.  Representatives  from  Mortgagor met with Amerada  Hess,  who accepted its
contractual responsibility and is currently handling the claim.

     7. Clayton  Field,  Texas -- Pursuant to a pending sale by Kinder Morgan to
Kopono Energy of an easement,  due diligence  uncovered a two feet deep plume of
old condensate on top of groundwater.  Initial sampling  revealed that the plume
did not extend to property  owned by Mortgagor.  Recent tests confirm that it is
remote that Mortgagor has any potential  responsibility  for this plume.  In the
unlikely event that Mortgagor  does bear some  liability,  it is unknown at this
time what the remediation costs would be.

     8. Rio Vista Field,  California  -- Pursuant to an  acquisition  of Vintage
Petroleum,  Inc.,  Mortgagor  sublet a field office back to Vintage.  This field
office was allegedly  surrounded by arsenic  contaminated rock. An investigation
was conducted by Entrix in March 2001.  Chevron (a former  property owner) hired
Entrix,  and  appears  to be  accepting  responsibility  for any  contamination.
Mortgagor has not been informed of the test results.

     Additionally  at this site,  there are  several  dozen  joints of pipe that
contain an asbestos  coating that are  segregated  on a pipe rack.  The asbestos
coating is in a nonfriable  state, and does not pose any  environmental  risk at
this time.  The  estimated  cost for  moving  this pipe to an  approved  offsite
landfill is $7- $10,000, which will be accomplished shortly.