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                                                                  EXHIBIT 10.1.3

                               THIRD AMENDMENT TO
                   FIRST AMENDED AND RESTATED CREDIT AGREEMENT

         THIS THIRD AMENDMENT TO FIRST AMENDED AND RESTATED CREDIT AGREEMENT,
dated effective as of August 10, 2000 (the "Third Amendment"), is entered into
between and among HERITAGE OPERATING, L.P., a Delaware limited partnership (the
"Borrower") and BANK OF OKLAHOMA, NATIONAL ASSOCIATION ("BOk"), FIRSTAR BANK
N.A. (formerly known as Mercantile Bank National Association) ("Firstar"), LOCAL
OKLAHOMA BANK, N.A. ("Local") and HARRIS TRUST AND SAVINGS BANK ("Harris") (BOk,
Firstar, Local and Harris, together with each other Person that becomes a Bank
pursuant to Article XI of the Credit Agreement (hereinafter defined)
collectively referred to herein as the "Banks"), BOk, as administrative agent
for the Banks (in such capacity, the "Administrative Agent") and Firstar, as
co-agent for the Banks (in such capacity, the "Co-Agent").

         WHEREAS, the Borrower, the Banks (other than Harris), the
Administrative Agent and the Co-Agent entered into that certain First Amended
and Restated Credit Agreement dated as of May 31, 1999 (the "Restated Credit
Agreement"), as subsequently amended by that certain First Amendment to First
Amended and Restated Credit Agreement dated as of October 15, 1999 (the "First
Amendment"), and by that certain Second Amendment to First Amended and Restated
Credit Agreement dated as of May 31, 2000 (the "Second Amendment") (the Restated
Credit Agreement, together with the First Amendment and the Second Amendment and
all such other and further amendments now or hereafter entered into, including
without limitation this Third Amendment, are collectively referred to as the
"Credit Agreement"); and

         WHEREAS, the Restated Credit Agreement, as amended and modified by the
First Amendment and Second Amendment, is sometimes referred to as the "Existing
Credit Agreement"; and

         WHEREAS, the Borrower intends to issue up to $250,000,000 Senior
Secured Notes due August 10, 2020 under the August 10, 2000 Note Purchase
Agreement ("2000 Note Purchase Agreement"), and has designated the 2000 Note
Purchase Agreement as an Additional Parity Debt Agreement (as such term is
defined in the Intercreditor and Agency Agreement dated as of June 28, 1996, as
supplemented and amended); and

         WHEREAS, the Borrower has requested the Banks (including Harris), the
Administrative Agent and the Co-Agent to consent, subject to the satisfaction of
certain conditions to effectiveness, to an amendment to the Credit Agreement to,
among other purposes, (i) increase the maximum outstanding amount of the Working
Capital Loan pursuant to the Working Capital Facility from $35,000,000.00 to
$50,000,000.00 by virtue of Harris becoming one of the Banks with a Maximum
Commitment Amount of $15,000,000.00 ($7,5000,000.00 maximum Acquisition Facility
and $7,500,000.00 maximum Working Capital Facility); (ii) reallocate the
remaining Banks' respective maximum Acquisition Facility and Working Capital
Facility Amounts as specified in paragraph 1CC (Section 10.1 of the Credit
Agreement) hereof below; and (iii) amend and modify other provisions of the
Credit Agreement in conformity with the provisions of the 2000 Note Purchase
Agreement.

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         NOW, THEREFORE, the parties hereto agree as follows:

         1. Amendments. The Credit Agreement shall be amended as set forth
below:

                  A. Section 1.1. of the Credit Agreement is amended by deleting
the definitions of "Bi-State", "Business", "Current Management" "Existing Credit
Agreement", "General Partner", "HHI Acquisition Notes", "Note Purchase
Agreement", "Private Placement Notes" and "PUHCA" and inserting in lieu thereof
the following definitions in the appropriate alphabetical position:

                  "Bi-State" means Bi-State Propane, a California limited
         partnership.

                  "Business" means the business of wholesale and retail sales,
         storage, transportation and distribution of propane gas; providing
         repair, installation and maintenance services for propane heating
         systems; the sale and distribution of propane-related supplies and
         equipment (including appliances); the generation, transportation, sale,
         distribution and marketing relating thereto of propane-powered fuel
         cells, or the power generated therefrom and equipment related thereto;
         and the marketing of natural gas to any then current propane user in
         such areas where the Borrower operates from time to time, provided,
         that, with respect to such marketing, the Borrower shall act only as a
         marketing agent for a natural gas utility and shall receive a fee or
         other compensation for such services provided.

                  "Current Management" means not less than any two of the
         following: James E. Bertelsmeyer, R. C. Mills, H. Michael Krimbill,
         Brad Atkinson or Larry Dagley, together with the heirs of, and trusts
         for the benefit of family members controlled by, any such executive
         manager.

                  "Existing Credit Agreement" means the Credit Agreement dated
         as of June 25, 1996, as amended by the First Amendment to Credit
         Agreement dated as of July 25, 1996, the Second Amendment to Credit
         Agreement dated as of February 28, 1997, the Third Amendment to Credit
         Agreement dated as of September 30, 1997, the Fourth Amendment to
         Credit Agreement dated as of November 18, 1997, and the Fifth Amendment
         to Credit Agreement dated as of November 13, 1998, between and among
         Borrower, BOk, Mercantile and BankBoston, N.A., and BankBoston, N.A. as
         Administrative Agent, and Bok, Documentation Agent, as replaced and
         restated by the First Amended and Restated Credit Agreement dated as of
         May 31, 1999, between and among Borrower, BOk, Mercantile and Local,
         and BOk, as Administrative Agent, and Mercantile, as Co-Agent, as
         amended by the First Amendment to First Amended and Restated Credit
         Agreement dated as of October 31, 1999, between and among Borrower,
         BOk, Mercantile and Local, and BOk, as Administrative Agent, and
         Mercantile, as Co-Agent, and as amended by the Second Amendment to
         First Amended and Restated Credit Agreement dated as of May 31, 2000,
         between and among Borrower, BOk, Firstar and Local, and BOk, as
         Administrative Agent, and Firstar, as Co-Agent.

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                  "General Partner" means Heritage (or, if applicable, U.S.
         Propane) in its capacity as General Partner of the Borrower.

                  "HHI Acquisition Notes" shall mean those certain promissory
         notes from Heritage payable to the order of the Banks as more
         particularly described and defined in the HHI Restated Letter Agreement
         among Heritage, the Banks and the Agents dated as of May 31, 1999, the
         Amendments to the HHI Restated Letter Agreement dated as of October 15,
         1999, as of May 31, 2000, and as of August 10, 2000, and as further
         amended from time to time, and any credit agreement among Heritage, the
         Banks and the Agents as contemplated by paragraph (ii) of each HHI
         Restated Letter Agreement (collectively the "HHI Agreement").

                  "Note Purchase Agreement" means that certain (i) Note Purchase
         Agreement between Heritage, Borrower and the Note Purchasers named in
         the Purchaser Schedule annexed as Schedule I thereto dated as of June
         25, 1996, as amended, (ii) Note Purchase Agreement between Borrower and
         the Note Purchasers named in the Initial Purchaser Schedule annexed
         thereto and each Subsequent Note Purchase Agreement entered into in
         connection therewith, dated as of November 19, 1997, as amended, and
         (iii) Note Purchase Agreement dated as of August 10 ,2000, between
         Borrower and the Note Purchasers named in the Initial Purchaser
         Schedule annexed thereto and each Supplemental Note Purchase Agreement
         entered into in connection therewith, as amended.

                  "Private Placement Notes" means (i) the $120,000,000 senior
         secured notes issued pursuant to the Note Purchase Agreement dated as
         of June 25, 1996, as amended, (ii) the $47,000,000 senior secured notes
         issued pursuant to the Note Purchase Agreement dated as of November 19,
         1997, as amended, and (iii) up to $250,000,000 senior secured notes
         issued pursuant to the Note Purchase Agreement dated as of August 10,
         2000, as amended, and any Supplemental Note Purchase Agreement.

                  "PUHCA" is defined in Section 8.19.

                  B. The definitions of "Harris" and "U.S. Propane" are added to
Section 1.1 of the Credit Agreement in their appropriate alphabetical position:

                  "Harris" has the meaning ascribed thereto in the initial
         paragraph of the Third Amendment.

                  "U.S. Propane" shall mean U.S. Propane, L.P., a Delaware
         limited partnership.

                  C. The form of Exhibits 2.1.3 (Acquisition Loan Borrowing
Request) and 2.1.4 (Acquisition Notes) annexed to the Existing Credit Agreement
are replaced with the form of Exhibits 2.1.3 and 2.1.4 annexed to this Third
Amendment.

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                  D. Section 2.2.2 of the Existing Credit Agreement is amended
by deleting "$35,000,000" and inserting in lieu thereof "$50,000,000". The form
of Exhibits 2.2.3 (Working Capital Borrowing Request) and 2.2.4 (Working Capital
Notes) annexed to the Existing Credit Agreement are replaced with the form of
Exhibits 2.2.3 and 2.2.4 annexed to this Third Amendment.

                  E. Section 3.1 of the Existing Credit Agreement is amended by
deleting "October 31, 1999" and inserting in lieu thereof "July 31, 2000".

                  F. Section 4.2.3(i) of the Existing Credit Agreement is
amended by deleting the reference to "7B.7(iii)(c)(ii)(x)" and inserting in lieu
thereof the reference to "7B.7(iii)(b)(ii)(x)".

                  G. Section 6.1(vii) of the Existing Credit Agreement is
deleted in its entirety and replaced by the following:

                  (vii) Opinions of Borrower's Counsel. The Agents shall have
received from Borrower's counsel, Doerner, Saunders, Daniel & Anderson, L.L.P.,
a favorable written closing opinion addressed to the Agents and the Banks with
respect to the Credit Agreement, as amended by the Third Amendment, satisfactory
in form and substance to the Administrative Agent's counsel including, without
limitation, an opinion that all notices to or consents of the Collateral Agent
or the Note Purchasers and all amendments to the Note Purchase Agreements and
the Intercreditor Agreement as required by the amendments, modifications and
transactions contemplated by the Third Amendment have been duly obtained and are
in full force and effect.

                  H. Section 7A.1(ii) of the Existing Credit Agreement is
deleted in its entirety and the following shall be substituted therefor:

                  (ii) as soon as practicable and in any event within 95 days
         after the end of each fiscal year, consolidated statements of income
         and cash flows and a consolidated statement of partners' capital (or
         stockholders' equity, as applicable) of the Borrower and its
         Subsidiaries for such year, and consolidated balance sheets of the
         Borrower and its Subsidiaries, as at the end of such year, setting
         forth in each case, in comparative form corresponding consolidated
         figures from the preceding annual audit, all in reasonable detail and
         reported on by Arthur Andersen LLP, or other independent public
         accountants of recognized national standing selected by the Borrower
         whose report shall be without limitation as to the scope of the audit
         (provided that such report shall not include with the scope of the
         audit the consolidating statements, if any, required by the final
         proviso of this clause (ii)); provided, however, that at any time when
         the Master Partnership shall be subject to the reporting requirements
         of Section 13 or 15(d) of the Exchange Act delivery within the time
         period specified above of copies of the Annual Report on Form 10-K of
         the Master Partnership for such fiscal year prepared in compliance with
         the requirements therefor and filed with the

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         Commission shall be deemed to satisfy the requirements of this clause
         (ii) if (x) the Consolidated Net Income of the Borrower and its
         Subsidiaries accounts for at least 95% of the net income of the Master
         Partnership for such fiscal year, and (y) all such statements required
         to be delivered pursuant to this clause (ii) with respect to the
         Borrower and its Subsidiaries are either included in such Form 10-K
         delivered separately by the Borrower together with such Form 10-K; and,
         provided further, however, that at any time the Total Assets of the
         Borrower and its Subsidiaries account for less than 85% of the Total
         Assets of the Master Partnership for any fiscal year, then the
         statements and balance sheet required to be delivered with respect to
         the Borrower and its Subsidiaries in this clause (ii) for such fiscal
         year shall be both consolidated and consolidating, and such
         consolidating statements shall be certified by an authorized financial
         officer of the Borrower as presenting fairly, in all material respects,
         the information contained therein, in accordance with GAAP (except for
         the absence of footnotes);

                  I. Section 7A.1(xi) of the Existing Credit Agreement is
amended by (x) deleting the phrase "; and" at the end of such subsection and (y)
inserting the following phrase at the end of such subsection:

                  ; provided, however, that for so long as the Security
         Agreement remains in full force and effect, delivery by the Borrower to
         the Collateral Agent of the report specified in Section 5.1(g) of the
         Security Agreement shall be deemed to satisfy the requirements of this
         clause (xi); and

                  J. Section 7A of the Existing Credit Agreement is amended by
inserting the following section immediately after Section 7A.16 thereof:

                  7A.17 General Partner. At such time as U.S. Propane shall be
         substituted for Heritage as the general partner of the Borrower, (i) no
         Default or Event of Default shall exist and be continuing before and
         after giving effect to such substitution, (ii) U.S. Propane shall
         assume in writing the obligations of Heritage under the Partnership
         Agreement, (iii) U.S. Propane shall not engage in any business or own
         any assets other than the ownership of general and/or limited partner
         interests in the General Partner and any activities incidental thereto,
         including, without limitation, cash management services for Heritage,
         the Borrower and its Subsidiaries and inter-company loans made to
         Heritage, the Borrower and its Subsidiaries in the ordinary course of
         business and (iv) immediately after giving effect to such substitution,
         no Material Adverse Effect shall exist.

                  K. Section 7B.1(ii) of the Existing Credit Agreement is
deleted in its entirety and the following shall be substituted therefor:

                  (ii) Ratio of Consolidated Funded Indebtedness to Consolidated
         EBITDA. The Borrower will not permit the ratio as of the end of any
         fiscal

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         quarter of Consolidated Funded Indebtedness to Consolidated EBITDA to
         exceed 5.00 to 1.00;

                  L. Section 7B.2(ii) of the Existing Credit Agreement is
amended by deleting the reference to "$35,000,000" and inserting in lieu thereof
the following amount of "$50,000,000".

                  M. Section 7B.2(iii) of the Existing Credit Agreement is
amended by (x) deleting each reference to "$3,000,000" and inserting in lieu
thereof the following amount of "$10,000,000" and (y) deleting the reference to
"50,000,000" and inserting in lieu thereof the following amount of $60,000,000".

                  N. Section 7B.2(v) of the Existing Credit Agreement is amended
by deleting the reference to "$1,000,000" and inserting in lieu thereof the
following amount of "$3,000,000".

                  O. Section 7B.2(viii) of the Existing Credit Agreement is
deleted in its entirety and the following shall be substituted therefor:

                  (viii) M-P Energy Partnership and M-P Oils, Ltd. may become
         and remain liable with respect to Indebtedness in an aggregate
         principal amount not to exceed $10,000,000, and the Borrower may become
         and remain liable with respect to Guarantees of such Indebtedness of
         M-P Energy Partnership or M-P Oils, Ltd. and of Indebtedness of
         Bi-State, Heritage Energy Resources L.L.C., or any other Subsidiaries
         of the Borrower, provided that the aggregate amount of all Guarantees
         permitted by this clause (viii) shall not exceed $10,000,000;

                  P. Section 7B.3(viii) of the Existing Credit Agreement is
deleted in its entirety and the following shall be substituted therefor:

                  (viii) Liens created after June 25, 1996 to secure all or any
         part of the purchase price, or to secure Indebtedness (other than
         Parity Debt) incurred or assumed to pay all or any part of the purchase
         price or cost of construction, of property acquired or constructed by
         the Borrower or any of its Subsidiaries or to secure obligations
         incurred in consideration of non-compete agreements ("Non-Compete
         Obligations") entered into in connection with any such acquisition,
         including an acquisition complying with clause (b)(y) of Section 7B.9;
         provided that (a) any such Lien shall be confined solely to the item or
         items of such property (or improvement thereon) so acquired or
         constructed and, if required by the terms of the instrument creating
         such Lien, other property (or improvement thereon) which is an
         improvement to such acquired or constructed property (and, in the case
         of any Lien securing Non-Compete Obligations, shall also be limited to
         (x) such items of property as acquired which are not included in the
         definition of Collateral and (y) such additional items of the property
         so acquired, having a total fair market value (as determined in good
         faith by the board of Directors of the General Partner) for the sum of
         (x) and (y) that is not more than the amount of the Non-Compete
         Obligations so secured), (b) such item or items of property so

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         acquired and subject to such Lien are not required to become part of
         the Collateral under the terms of the Security Agreement, (c) any such
         Lien shall be created contemporaneously with, or within 180 days after,
         the acquisition or construction of such property, and (d) such Lien
         does not exceed an amount equal to 85% of the fair market value (100%
         in the case of Capitalized Lease Obligations and 35% in the case of
         Non-Compete Obligations) of such property (as determined in good faith
         by the Board of Directors of the General Partner) at the time of
         acquisition thereof and (e) after giving effect to such Lien no
         Noncompliance Event, Default or Event of Default shall exist.

                  Q. Section 7B.3(xiii) of the Existing Credit Agreement is
amended by deleting the reference to "$2,000,000" and inserting in lieu thereof
the following amount of "$6,000,000".

                  R. Section 7B.4(i) of the Existing Credit Agreement is amended
by deleting the reference to "$5,000,000" and inserting in lieu thereof the
following amount of "$15,000,000".

                  S. Section 7B.5(i) of the Existing Credit Agreement is deleted
in its entirety and the following shall be substituted therefor:

                  (i) the Borrower or any of its Subsidiaries may make and own
         Investments (w) consisting of Units issued for purposes of making
         acquisitions, (x) arising out of loans and advances by the Borrower to
         any Wholly-Owned Subsidiary incurred in the ordinary course of the
         Borrower's business as conducted through its Subsidiaries or to
         employees incurred in the ordinary course of business and consisting of
         advances to pay reimbursable expenditures, (y) arising out of
         extensions of trade credit or advances to third parties in the ordinary
         course of business and (z) acquired by reason of the exercise of
         customary creditors' rights upon default or pursuant to the bankruptcy,
         insolvency or reorganization of a debtor;

                  T. Section 7B.5(iii)(d)(B) of the Existing Credit Agreement is
amended by inserting the work "unsecured" immediately preceding the phrase "debt
obligations of which".

                  U. Clause (iii) of Section 7B.5(v) of the Existing Credit
Agreement is amended by deleting the phrase "exceed $3,000,000" and inserting in
lieu thereof the following phrase "of determination exceed 2% of Consolidated
Net Tangible Assets, (provided that the aggregate amount of Investments
permitted under this subclause (iii) shall not at any time exceed $12,500,00)".

                  V. Section 7B.7(i) of the Existing Credit Agreement is amended
by inserting the phrase "and its Subsidiaries" immediately following the phrase
"less than the Consolidated Net Worth of the Company".

                  W. Subsections (a), (b), (c) and (d) of Section 7B.7(iii) of
the Existing Credit Agreement are deleted in their entireties and the following
shall be substituted therefor:

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                  (a) immediately after giving effect to such proposed
         disposition no Default or Event of Default shall exist and be
         continuing, satisfaction of this requirement to be set forth in
         reasonable detail in an Officer's Certificate delivered to each holder
         of a Note at the time of such transaction in the case of any Asset Sale
         involving assets that generate Consolidated EBITDA and involve
         consideration of $2,500,000 or more;

                  (b) such sale or other disposition is for cash consideration
         or for consideration consisting of not less than 75% cash and not more
         than 25% interest-bearing promissory notes; provided that the
         limitation described in this clause (b) shall not apply to any sale or
         other disposition generating less than $2,500,000 of Net Proceeds;

                  (c) one of the following two conditions must be satisfied:

                           (i) (x) the aggregate Net Proceeds of all assets so
                  disposed of (whether or not leased back) over the immediately
                  preceding 12-month period does not exceed $5,000,000 and (y)
                  the aggregate Net Proceeds of all assets so disposed of
                  (whether or not leased back) from the date of issue of the
                  Initial Note under the Note Purchase Agreement dated as of
                  August 10, 2000 through the date of such disposition does not
                  exceed $20,000,000; or

                           (ii) in the event that such Net Proceeds (less the
                  amount thereof previously applied in accordance with clause
                  (x) of this clause (c)(ii)) exceeds the limitations determined
                  pursuant to clauses (x) and (y) of clause (c)(i) of this
                  Section 7B.7 (such excess amount being herein called "Excess
                  Sale Proceeds"), the Borrower shall within 12 calendar months
                  of the date on which such Net Proceeds exceeded any such
                  limitation, cause an amount equal to such Excess Sale Proceeds
                  to be applied (x) to the acquisition of assets in replacement
                  of the assets so disposed of or of assets which may be
                  productively used in the United States of America or Canada in
                  the conduct of the Business, or (y) to the extent not applied
                  pursuant to the immediately preceding clause (x), to offer to
                  make prepayments on the Notes pursuant to Section 4.2.3 hereto
                  and, allocated on the basis specified for such prepayments in
                  the definition of Allocable Proceeds, to offer to repay other
                  Parity Debt (other than Indebtedness under Section 7B.2(ii) or
                  that by its terms does not permit such offer to be made); and

                  (d) such sale or other proposed disposition shall be for fair
         value and in the best interests of the Borrower, satisfaction of this
         requirement to be certified in an Officer's Certificate delivered to
         the Administrative Agent in the case of any Asset Sale involving assets
         that generate Consolidated EBITDA and involve consideration of
         $2,500,000 or more."

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                  X. Section 7B.9(i)((b)(y) of the Existing Credit Agreement is
amended by adding the phrase "or a Wholly-Owned Subsidiary of the General
Partner" immediately following the phrase "Capital Stock of which was purchased
by the General Partner".

                  Y. Section 8.2 of the Existing Credit Agreement is amended by
inserting the phrase "(or, if applicable, U.S. Propane)" immediately following
(x) the phrase "of the Borrower is Heritage" and (y) the phrase "partners other
than Heritage".

                  Z. Section 8.3 of the Existing Credit Agreement is amended by
inserting the phrase ", limited liability company" immediately following the
phrase "in good standing as a foreign corporation".

                  AA. Section 8.13 of the Existing Credit Agreement is amended
by deleting the references to "$2,000,000" and inserting in lieu thereof the
following amount of "$5,000,000".

                  BB. Subsections (ii), (iii), (iv) and (v) of Section 8.14 of
the Existing Credit Agreement are hereby deleted in their entireties and the
following shall be substituted therefor:

                  (ii) (a) There is no Hazardous Substance present at any of the
         real property currently owned or leased by the Borrower, any of its
         Subsidiaries or Heritage except to the extent that such presence could
         not reasonably be expected to have a Material Adverse Effect, and (b)
         to the knowledge of the Borrower, any of its Subsidiaries or Heritage,
         there was no Hazardous Substance present at any of the real property
         formerly owned or leased by the Borrower, any of its Subsidiaries or
         Heritage during the period of ownership or leasing by the Borrower, any
         of its Subsidiaries or Heritage except to the extent that such presence
         could not be reasonably expected to have a Material Adverse Effect; and
         with respect to such real property and subject to the same knowledge
         and temporal qualifiers concerning Hazardous Substances with respect to
         formerly owned or leased real properties, there has not occurred (x)
         any release, or to the knowledge of the Borrower, any of its
         Subsidiaries or Heritage, threatened release of a Hazardous Substance,
         or (y) any discharge or, to the knowledge of the Borrower, any of its
         Subsidiaries or Heritage threatened discharge of any Hazardous
         Substance into the ground, surface or navigable waters which discharge
         or threatened discharge violates any federal, state, local or foreign
         laws, rules or regulations concerning water pollution, except to the
         extent that such release or discharge could not reasonably be expected
         to have a Material Adverse Effect.

                  (iii) None of the Borrower, any of its Subsidiaries or
         Heritage has disposed of, transported, or arranged for the
         transportation or disposal of any Hazardous Substance where such
         disposal, transportation, or arrangement would give rise to liability
         pursuant to CERCLA or any analogous state statute other than any such
         liabilities that could not reasonably be expected to have a Material
         Adverse Effect.

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                  (iv) As of the date hereof: (a) no Lien has been asserted by
         any Governmental Authority or person resulting from the use, spill,
         discharge, removal, or remediation of any Hazardous Substance with
         respect to any real property currently owned or leased by the Borrower,
         any of its Subsidiaries or Heritage, and (b) to the knowledge of the
         Borrower, any of its Subsidiaries or Heritage, no such Lien was
         asserted with respect to any of the real property formerly owned or
         leased by Heritage during the period of ownership or leasing of the
         real property by such Person.

                  (v) (a) There are no underground storage tanks,
         asbestos-containing materials, polychlorinated biphenyls, or urea
         formaldehyde insulation at any of the real property currently owned or
         leased by the Borrower, any of its Subsidiaries or Heritage in
         violation of any Environmental Law, and (b) to the knowledge of the
         Borrower, any of its Subsidiaries or Heritage, there were no
         underground storage tanks, asbestos-containing materials,
         polychlorinated biphenyls, or urea formaldehyde insulation at any of
         the real property formerly owned or leased by Heritage in violation of
         any Environmental Law during the period of ownership or leasing of such
         real property by such Person.

                  CC. Article VIII of the Existing Credit Agreement is amended
by inserting the following Section 8.21:

                  8.21 Intercreditor Agreement and Security Agreement. The
         Intercreditor Agreement is, to the best knowledge of the Borrower, in
         full force and effect. The Security Agreement is in full force and
         effect. Prior to the date hereof neither the Security Agreement nor, to
         the best knowledge of the Borrower, except for the Amendment Agreement
         to the Intercreditor Agreement dated as of October 15, 1999, the
         Intercreditor Agreement has been amended or supplemented. The Borrower
         has delivered to the Collateral Agent such Certificate and Stock Powers
         and such Financing Statements under the Uniform Commercial Code of such
         jurisdictions as are necessary to perfect the Liens created by the
         Security Agreement. The Financing Statements have been filed in all of
         such necessary jurisdictions to perfect the assignment of the security
         interest purported to be created by the Security Agreement.

                  DD. Section 9.1(iii) of the Existing Credit Agreement deleted
in its entirety and the following shall be substituted therefor:

                  (iii) the Borrower or any Subsidiary of the Borrower (whether
         as primary obligor or as guarantor or other surety) defaults in any
         payment of principal of or interest on any Parity Debt or any other
         Indebtedness other than the Notes (including without limitation any
         Capitalized Lease Obligation, any obligation under a conditional sale
         or other title retention agreement, any obligation issued or assumed as
         full or partial payment for property whether or not secured by a
         purchase money mortgage or any obligation under notes payable or drafts
         accepted representing extensions of credit), beyond any period of grace

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         provided with respect thereto, or Heritage defaults in payment of
         principal of or interest on any indebtedness thereof, including without
         limitation, in any payment of principal of or interest on the credit
         facility issued under the HHI Agreement, as amended from time to time,
         and as evidenced by the HHI Acquisition Notes, or the Borrower,
         Heritage or any Subsidiary of the Borrower fails to perform or observe
         any other agreement or term or condition contained in any agreement
         under which any such obligation is created (or if any other event
         thereunder or under any such agreement shall occur and be continuing)
         and the effect of such failure or other event is to cause, or to permit
         the holder or holders of such Indebtedness (or a trustee on behalf of
         such holder or holders) to cause, such obligation to become due or to
         be repurchased prior to any stated maturity, provided that the
         aggregate amount of all Indebtedness as to which such a default
         (payment or other) shall occur and be continuing or such a failure or
         other event causing or permitting acceleration (or resale to the
         Borrower, Heritage or any Subsidiary of the Borrower) shall occur and
         be continuing exceeds $5,000,000; provided, further, that no waiver,
         modification or amendment relating to any such a default (payment or
         other) or such a failure or other event with respect to any Parity Debt
         or agreement or instrument relating to any Parity Debt shall be
         effective for purposes of this clause (iii) if any consideration (other
         than the payment of reasonable attorney's fees) is given, directly or
         indirectly, by the Borrower, Heritage or any of the Borrower's
         Subsidiaries or Affiliates in respect thereof, unless substantially the
         same consideration is given to the holders of the Notes; or

                  EE. Section 9.1(xi) of the Existing Credit Agreement is
amended by deleting the reference to "$2,000,000" and inserting in lieu thereof
the following amount of "$5,000,000".

                  FF. Section 9.1(xv) of the Existing Credit Agreement is
deleted in its entirety and the following shall be substituted therefor:

                  (xv) any of the events described in clauses (a), (b), (c) or
         (d) shall occur: (a) the General Partner shall be engaged in any
         business or activities other than those permitted by the Partnership
         Agreement as in effect from time to time in accordance with Section
         7B.8, or (b) the General Partner or U.S. Propane ceases to be the sole
         general partner of the Borrower or the Master Partnership, or (c) the
         Specified Entities shall own, directly or indirectly through
         Wholly-Owned Subsidiaries, in the aggregate less than 51% of the
         Capital Stock of the General Partner, or (d) either Designated Current
         Manager shall, at any time during the Lock-Up Period applicable to such
         Designated Current Manager, own, directly or indirectly, less than 50%
         of the Common Units of the Master Partnership owned, directly or
         indirectly, by such Designated Current Manager immediately after giving
         effect to the Proposed Reorganization; or

                  GG. Section 10.1 of the Existing Credit Agreement is deleted
in its entirety and replaced by the following:

                                       11
<PAGE>   12
                  10.1 Interests in Loans/Commitments. The percentage interest
         of each Bank in the Loans and Letters of Credit, and the Commitments,
         shall be computed based on the maximum principal amount for each Bank
         as follows:

<TABLE>
<CAPTION>
                                                          Maximum
                                  Maximum                 Working                  Maximum
                                Acquisition               Capital                Commitments                Percentage
        Bank                   Loan Facility              Facility                  Amount                   Interest
        ----                   --------------          --------------          ---------------              ----------
<S>                            <C>                     <C>                     <C>                          <C>
Bok                            $22,500,000.00          $22,500,000.00          $ 45,000,000.00               45.0000%

Firstar                        $12,500,000.00          $12,500,000.00          $ 25,000,000.00               25.0000%

Local                          $ 7,500,000.00          $ 7,500,000.00          $ 15,000,000.00               15.0000%

Harris                         $ 7,500,000.00          $ 7,500,000.00          $ 15,000,000.00               15.0000%
                               --------------          --------------          ---------------              --------

       Total                   $50,000,000.00          $50,000,000.00          $100,000,000.00              100.0000%
</TABLE>

         2. Existing Credit Agreement/Counterparts. All of the remaining terms,
provisions and conditions of the Credit Agreement, except as otherwise expressly
amended and modified by this Third Amendment, shall continue in full force and
effect in all respects. This Third Amendment may be executed in multiple
counterparts, each of which shall be deemed an original and all of which shall
constitute a single Third Amendment. Delivery of an executed counterpart of a
signature page to this Third Amendment by telecopier shall be as effective as
delivery of a manually executed counterpart of this Third Amendment.

         3. Intercreditor Agreement/Security Agreement. The Borrower confirms
that it has reviewed and approved the terms of the Intercreditor Agreement,
including without limitation, the setoff sharing provisions set forth in Section
13(c) thereof. The Borrower agrees that any setoffs shared under the terms of
the Intercreditor Agreement with the Purchasers of the Private Placement Notes,
to the extent of the portions so shared, will not be deemed pay down the Loan.
The Borrower further confirms and represents to the Banks, the Administrative
Agent and the Co-Agent that (i) the additional $15,000,000.00 available under
the Commitments ($15,000,000.00 under the Working Capital Facility) is secured
by the Security Agreement and (ii) any amendments to or modifications of the
Security Agreement or the Intercreditor Agreement and any notice to or consent
of the Collateral Agent required by virtue of the increased Commitments or other
transactions contemplated by this Third Amendment have been duly and validly
consummated, given or obtained, as the case may be, and that such amendments,
modifications or consents remain in full force and effect.

         4. Assignments/Addition of Harris Bank. Each of BOk, Firstar and Local
shall have surrendered its Notes issued pursuant to the Existing Credit
Agreement to BOk, as Administrative Agent, in exchange for the Notes in the
respective face principal amounts pursuant to Section 10.1 hereof. Harris shall
have paid to the Administrative Agent in immediately available funds an amount
equal to its respective Percentage Interest in the outstanding principal balance
of the Acquisition Loan and the Working Capital Loan, respectively, as evidenced
by the Acquisition Note ($7,500,000.00) and the Working Capital Note
($7,500,000.00) being issued by the Borrower to the order of Harris pursuant to
Harris' Percentage Interests in the respective Loans.

                                       12
<PAGE>   13

         5. Further Assurances. The Borrower will, upon the request of the
Administrative Agent from time to time, promptly execute, acknowledge and
deliver, and file and record, all such instruments and notices, and take all
such action, as the Administrative Agent deems necessary or advisable to carry
out the intent and purposes of this Third Amendment and the Credit Agreement.

         6. General. The Credit Agreement and all of the other Loan Documents
are each confirmed as being in full force and effect. This Third Amendment, the
Credit Agreement and the other Loan Documents referred to herein or therein
constitute the entire understanding of the parties with respect to the subject
matter hereof and thereof and supersede all prior and current understandings and
agreements, whether written or oral, with respect to such subject matter. The
invalidity or unenforceability of any provision hereof shall not affect the
validity and enforceability of any other term or provision hereof. The headings
in this Third Amendment are for convenience of reference only and shall not
alter, limit or otherwise affect the meaning hereof. Each of this Third
Amendment and the Credit Agreement is a Loan Document and may be executed in any
number of counterparts, which together shall constitute one instrument, and
shall bind and inure to the benefit of the parties and their respective
successors and assigns including as such successors and assigns all holders of
any Note. This Third Amendment shall be governed by and construed in accordance
with the laws (other than the conflict of law rules) of the State of Oklahoma.

         7. Conditions to Effectiveness. The effectiveness of this Third
Amendment is subject to the satisfaction of the following conditions:

         (a) the Required Banks under the Credit Agreement shall have consented
to this Third Amendment as evidenced by their execution thereof;

         (b) the requisite percentages of holders of Private Placement Notes
shall have agreed to all amendments necessary to effect the issuance of the
Notes under the Note Purchase Agreement dated as of August 10, 2000 and a copy
thereof shall have been provided to the Administrative Agent. In the event the
Borrower agrees that the holders of any Private Placement Notes shall be granted
any additional or more restrictive financial covenant or negative covenants or
events of default than are imposed on the Borrower under the Credit Agreement,
as amended hereby, the Borrower agrees that the Banks shall also be granted such
more restrictive financial covenant or negative covenants or events of defaults;

         (c) the Administrative Agent shall have received evidence that (i) the
Master Partnership shall have transferred to the Borrower the equity
contribution, as contemplated by the Second Amendment, in the amount of at least
$45,000,000 (the "Equity Contribution"), and (ii) the entire amount of such
Equity Contribution shall have been applied to the payment of outstanding
Indebtedness of the Borrower;

         (d) counsel to the Banks shall have been paid fees and expenses
incurred in connection with this Third Amendment; and

                                       13
<PAGE>   14

         (e) materials reasonably satisfactory to the Administrative Agent shall
have been delivered evidencing that the Proposed Reorganization, as defined in
the Second Amendment, has become effective.

         IN WITNESS WHEREOF, the parties hereto have caused this Third Amendment
to First Amended and Restated Credit Agreement to be duly executed and delivered
in Tulsa, Oklahoma, effective as of the 10th day of August, 2000, by the
undersigned duly authorized officers thereof.

                                       "Borrower"

                                       HERITAGE OPERATING, L.P., a Delaware
                                          limited partnership

                                       By:   Heritage Holdings, Inc., a Delaware
                                             corporation, general partner

                                             By:
                                                 -------------------------------
                                                    H. Michael Krimbill
                                                    President

                                       14
<PAGE>   15

                                          "Banks"

                                          BANK OF OKLAHOMA, NATIONAL ASSOCIATION

                                          By:
                                              ----------------------------------
                                                       Denise L. Maltby
                                                       Senior Vice President

                                       15
<PAGE>   16

                                        FIRSTAR BANK N.A. (formerly known as
                                           Mercantile Bank National Association)

                                        By:
                                            ------------------------------------
                                        Its:
                                             -----------------------------------

                                       16
<PAGE>   17

                                          LOCAL OKLAHOMA BANK, N.A.

                                          By:
                                              ----------------------------------
                                                       Elisabeth F. Blue
                                                       Senior Vice President

                                       17
<PAGE>   18

                                          HARRIS TRUST AND SAVINGS BANK

                                          By:
                                              ----------------------------------
                                                       Timothy E. Broccolo
                                                       Managing Director

                                       18
<PAGE>   19

                                          "Administrative Agent"

                                          BANK OF OKLAHOMA, NATIONAL ASSOCIATION

                                          By:
                                              ----------------------------------
                                                       Denise L. Maltby
                                                       Senior Vice President

                                       19
<PAGE>   20

                                        "Co-Agent"

                                        FIRSTAR BANK N.A. (formerly known as
                                           Mercantile Bank National Association)

                                        By:
                                            ------------------------------------
                                        Its:
                                             -----------------------------------

                                       20
<PAGE>   21

                                  EXHIBIT 2.1.3

                       ACQUISITION LOAN BORROWING REQUEST

Bank of Oklahoma, National Association
P.O. Box 2300
Bank of Oklahoma Tower
One Williams Center
Tulsa, Oklahoma  74192

(Administrative Agent for Bank of Oklahoma, National Association, Firstar Bank,
N.A., Local Oklahoma Bank, N.A., and Harris Trust and Savings Bank)
(collectively the "Banks")

Gentlemen:

         Pursuant to the provisions of the First Amended and Restated Credit
Agreement dated as of May 31, 1999, as amended or extended from time to time
(collectively the "Credit Agreement"), among HERITAGE OPERATING, L.P.
("Borrower"), Bank of Oklahoma, as Administrative Agent for the Banks (therein
described and defined), and the Banks, the Borrower hereby (i) confirms and
ratifies the Collateral Agent's continuing security interest in the Collateral;
(ii) applies to you for an Acquisition Loan on the Acquisition Facility in the
amount of $_______ (Line 2 below); (iii) certifies that no Event of Default or
Default under the Credit Agreement has occurred and is continuing as of the date
hereof; (iv) represents and warrants to you that the representations, covenants
and warranties set forth or referred to in the Credit Agreement are true and
correct in all material respects on and as of this date unless such
representation or warranty relate only to an earlier date; and (v) certifies to
you the accuracy of the following information concerning the Acquisition Notes:

         1.  Existing Acquisition Loan Credit (not to exceed        $
             $50,000,000 minus outstanding Indebtedness on           ------
             the HHI Acquisition Notes)

         2.  Plus:  Acquisition Loan requested                      $
                                                                     ------

                                 OR

         3.  Less:  Additional Payment                              $
                                                                     ------

         4.  New Acquisition Note Balance
               Line 1 plus Line 2 or less Line 3, but not to
               exceed $50,000,000                                   $
                                                                     ------

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this
___________ day of ____________, _______.

                                      HERITAGE OPERATING, L.P.
                                      a Delaware limited Partnership

                                      By:  Heritage Holdings, Inc. a
                                           Delaware corporation, general partner

                                           By:
                                               ---------------------------------
                                                                         (Title)

<PAGE>   22

                                  EXHIBIT 2.2.3

                        WORKING CAPITAL BORROWING REQUEST

Bank of Oklahoma, National Association
P.O. Box 2300
Bank of Oklahoma Tower
One Williams Center
Tulsa, Oklahoma 74192

(Administrative Agent for Bank of Oklahoma, National Association, Firstar Bank,
N.A., Local Oklahoma Bank, N.A., and Harris Trust and Savings Bank)
(collectively the "Banks")

Gentlemen:

         Pursuant to the provisions of the First Amended and Restated Credit
Agreement dated as of May 31, 1999, as amended or extended from time to time
(collectively the "Credit Agreement"), among HERITAGE OPERATING, L.P.
("Borrower"), Bank of Oklahoma, as Administrative Agent for the Banks (therein
described and defined) and the Banks, the Borrower hereby (i) confirms and
ratifies the Collateral Agent's continuing security interest in the Collateral;
(ii) applies to you for a Working Capital Loan on the Working Capital Facility
in the amount of $_______ (Line 2 below); (iii) certifies that no Event of
Default or Default under the Credit Agreement has occurred and is continuing as
of the date hereof; (iv) represents and warrants to you that the
representations, covenants and warranties set forth or referred to in the Credit
Agreement are true and correct in all material respects on and as of this date;
and (v) certifies to you the accuracy of the following information concerning
the Working Capital Notes:

         1.  Existing Working Capital Facility Balance                $
             (not to exceed $50,000,000 minus outstanding              -----
             principal balance of Section 7B.2(v) Indebtedness)

         2.  Plus:  Working Capital Loan requested                    $
                                                                       -----

                                 OR

         3.  Less: Additional Payment                                 $
                                                                       -----

         4.  New Working Capital Notes Balance
                Line 1 plus Line 2 or less Line 3, but not to
                exceed $50,000,000 minus sum of (x) Letter
                of Credit Exposure plus (y) outstanding
                principal balance of Section 7B.2(v) Indebtedness     $
                                                                       -----

         IN WITNESS WHEREOF, the undersigned has hereunto set his hand this
_________ day of ______________ , _______.

                                      HERITAGE OPERATING, L.P.
                                      a Delaware limited Partnership

                                      By:  Heritage Holdings, Inc. a
                                           Delaware corporation, general partner

                                           By:
                                              ----------------------------------
                                                                         (Title)

<PAGE>   23

                                  EXHIBIT 2.1.4

                                 PROMISSORY NOTE
                               (ACQUISITION NOTE)

<PAGE>   24

                                  EXHIBIT 2.2.4

                                 PROMISSORY NOTE
                             (WORKING CAPITAL NOTE)<PAGE>   1

                                                      EXHIBIT 10.2.6 AND 10.16.4

                            HERITAGE OPERATING, L.P.

                           FOURTH AMENDMENT AGREEMENT

         Re:   Note Purchase Agreement dated as of June 25, 1996
              Note Purchase Agreement dated as of November 19, 1997

                                                                     Dated as of
                                                                 August 10, 2000

To each of the Holders named
   in Schedule 1 to this Fourth
   Amendment Agreement

Ladies and Gentlemen:

         Reference is made to

                  (i) the Note Purchase Agreement dated as of June 25, 1996 (the
         "Original 1996 Agreement"), among Heritage Operating, L.P., a Delaware
         limited partnership (the "Company") and the Purchasers named in the
         Purchaser Schedule attached thereto, as amended by a letter agreement
         (the "Letter Agreement") dated July 25, 1996, a First Amendment
         Agreement (the "First Amendment Agreement") dated as of October 15,
         1998, a Second Amendment Agreement (the "Second Amendment Agreement")
         dated as of September 1, 1999 and a Third Amendment Agreement (the
         "Third Amendment Agreement" dated as of May 31, 2000 (said Original
         1996 Agreement, as amended by the Letter Agreement, the First Amendment
         Agreement, the Second Amendment Agreement and the Third Amendment
         Agreement, being hereinafter referred to as the "Outstanding 1996
         Agreement") under and pursuant to which the Company issued, and there
         are presently outstanding, $120,000,000 aggregate principal amount of
         its 8.55% Senior Secured Notes due 2011 (the "1996 Notes"); and

                  (ii) the Note Purchase Agreement dated as of November 19, 1997
         (the "Original 1997 Agreement"), among the Company and the Purchasers
         named in the Initial Purchaser Schedule attached thereto, as amended by
         the First Amendment Agreement dated as of October 15, 1998, a Second
         Amendment Agreement (the "Second Amendment Agreement") dated as of
         September 1, 1999 and a Third Amendment Agreement (the "Third Amendment
         Agreement" dated as of May 31, 2000 (said Original 1997 Agreement, as
         so amended by the First Amendment Agreement, the Second Amendment
         Agreement and the Third Amendment Agreement, being hereinafter referred
         to as the "Amended Original 1997 Agreement"), under and pursuant to
         which the Company issued, and there are presently outstanding,
         $12,000,000 aggregate principal amount of its 7.17% Series A Senior
         Secured Notes due November 19, 2009 (the "Series A Notes") and
         $20,000,000 aggregate principal amount of its 7.26% Series B Senior
         Secured Notes due November 19, 2012 (the "Series B Notes"), as
         supplemented by the

<PAGE>   2

         First Supplemental Note Purchase Agreement dated as of March 13, 1998
         (the "First Supplemental Agreement") among the Company and the
         Purchasers named in the Supplemental Purchaser Schedule attached
         thereto, under and pursuant to which (a) the Company issued $5,000,000
         aggregate principal amount of its 6.50% Series C Senior Secured Notes
         due March 13, 2007 (the "Series C Notes"), $4,285,714.29 of which are
         presently outstanding, and (b) the Company issued, and there are
         presently outstanding, (x) $5,000,000 aggregate principal amount of its
         6.59% Series D Senior Secured Notes due March 13, 2010 (the "Series D
         Notes") and (y) $5,000,000 aggregate principal amount to its 6.67%
         Series E Senior Secured Notes due March 13, 2013 (the "Series E
         Notes").

         The Amended Original 1997 Agreement as supplemented by the First
Supplemental Agreement is hereinafter sometimes referred to as the "Outstanding
1997 Agreement." The Outstanding 1996 Agreement and the Outstanding 1997
Agreement are hereinafter sometimes collectively referred to as the "Outstanding
Agreements". The 1996 Notes, Series A Notes, Series B Notes, Series C Notes,
Series D Notes and Series E Notes are hereinafter sometimes collectively
referred to as the "Outstanding Notes." Capitalized terms used herein without
definition shall have the respective meanings assigned to such terms in the
Outstanding Agreements.

         The Company now desires to amend certain provisions of the Outstanding
Agreements. You are the owner and holder of the Outstanding Notes set forth
opposite your name on Schedule 1 hereto. The Company hereby requests that, from
and after the satisfaction of each of the conditions to effectiveness set forth
in Article IV below, said amendments shall be deemed to have been given and said
Outstanding Agreements shall be amended in the respects, but only in the
respects, hereinafter set forth.

                                    ARTICLE I
                      AMENDMENTS TO OUTSTANDING AGREEMENTS

         I-A. Section 4C(ii) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "clause (v)" and inserting in lieu thereof
the reference to "clause (iv)".

         I-B. Section 4D(vi) of each of the Outstanding Agreements is hereby
amended by deleting the phrase "clause (x) of".

         I-C. The lead-in paragraph of Section 5A of each of the Outstanding
Agreements is hereby amended by deleting the phrase "in triplicate".

         I-D. Section 5A(ii) of each of the Outstanding Agreements is hereby
deleted in its entirely and the following shall be substituted therefor:

         " (ii) as soon as practical and in any event within 95 days after the
         end of each fiscal year, consolidated statements of income and cash
         flows and a consolidated statement of partners' capital (or
         stockholders' equity, as applicable) of the Company and its
         Subsidiaries for such year, and consolidated balance sheets of

                                      -2-
<PAGE>   3

         the Company and its Subsidiaries, as at the end of such year, setting
         forth in each case, in comparative form corresponding consolidated
         figures from the preceding annual audit, all in reasonable detail and
         reported on by Arthur Andersen LLP, or other independent public
         accountants of recognized national standing selected by the Company
         whose report shall be without limitation as to the scope of the audit
         (provided that such report shall not include with the scope of the
         audit the consolidating statements, if any, required by the final
         proviso of this clause (ii)); provided, however, that at any time when
         the Master Partnership shall be subject to the reporting requirements
         of Section 13 or 15(d) of the Exchange Act delivery within the time
         period specified above of copies of the Annual Report on Form 10-K of
         the Master Partnership for such fiscal year prepared in compliance with
         the requirements therefor and filed with the Commission shall be deemed
         to satisfy the requirements of this clause (ii) if (x) the Consolidated
         Net Income of the Company and its Subsidiaries accounts for at least
         95% of the net income of the Master Partnership for such fiscal year,
         and (y) all such statements required to be delivered pursuant to this
         clause (ii) with respect to the Company and its Subsidiaries are either
         included in such Form 10-K or delivered separately by the Company
         together with such Form 10-K; and, provided further, however, that at
         any time the Total Assets of the Company and its Subsidiaries account
         for less than 85% of the Total Assets of the Master Partnership for any
         fiscal year, then the statements and balance sheet required to be
         delivered with respect to the Company and its Subsidiaries in this
         clause (ii) for such fiscal year shall be both consolidated and
         consolidating, and such consolidating statements shall be certified by
         an authorized financial officer of the Company as presenting fairly, in
         all material respects, the information contained therein, in accordance
         with GAAP (except for the absence of footnotes); "

         I-E. Section 5A(xi) of each of the Outstanding Agreements is hereby
amended by (x) deleting the phrase "; and" at the end of such subsection and (y)
inserting the following phrase at the end of such subsection:

         "; provided, however, that for so long as the Security Agreement
         remains in full force and effect, delivery by the Company to the
         Collateral Agent of the report specified in Section 5.1(g) of the
         Security Agreement shall be deemed to satisfy the requirements of this
         clause (xi); and".

         I-F. Section 5 of each of the Outstanding Agreements is hereby amended
by inserting the following section immediately after Section 5Q thereof:

                  "Section 5R. General Partner. At such time as U.S. Propane
         shall be substituted for Heritage as general partner of the Company,
         (i) no Default or Event of Default shall exist and be continuing before
         and after giving effect to such substitution, (ii) U.S. Propane shall
         assume in writing the obligations of Heritage under the Partnership
         Agreement, (iii) U.S. Propane shall not engage in any business or own
         any assets other than the ownership of general and/or limited partner
         interests in the Company and the Master Partnership and the ownership
         of interests in the General Partner and any

                                      -3-
<PAGE>   4

         activities incidental thereto, including, without limitation, cash
         management services for Heritage, the Company and its Subsidiaries and
         inter-company loans made to Heritage, the Company and its Subsidiaries
         in the ordinary course of business and (iv) immediately after giving
         effect to such substitution, no Material Adverse Effect shall exist."

         I-G. Section 6B(ii) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$35,000,000" and inserting in lieu thereof
the following amount of "$50,000,000".

         I-H. Section 6B(iii) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$3,000,000" and inserting in lieu thereof
the following amount of "$10,000,000".

         I-I Section 6B(v) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$1,000,000" and inserting in lieu thereof
the following amount of "$3,000,000".

         I-J. Section 6B(viii) of each of the Outstanding Agreements is hereby
deleted in its entirely and the following shall be substituted therefor:

                  "(viii) M-P Energy Partnership and M-P Oils, Ltd. may become
         and remain liable with respect to Indebtedness in an aggregate
         principal amount not to exceed $10,000,000, and the Company may become
         and remain liable with respect to Guarantees of such Indebtedness of
         M-P Energy Partnership or M-P Oils, Ltd. and of Indebtedness of
         Bi-State, Heritage Energy Resources L.L.C., or any other Subsidiaries
         of the Company, provided that the aggregate amount of all Guarantees
         permitted by this clause (viii) shall not exceed $10,000,000;"

         I-K. Section 6C(viii)(a)(x) of each of the Outstanding Agreements is
hereby amended by deleting the phrase "of the character".

         I-L. Section 6C(xiii) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$2,000,000" and inserting in lieu thereof
the following amount of "$6,000,000".

         I-M. Section 6D(i) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$5,000,000" and inserting in lieu thereof
the following amount of "$15,000,000".

         I-N. Section 6E(i) of each of the Outstanding Agreements is hereby
deleted in its entirety and the following shall be substituted therefor:

                  "(i) the Company or any of its Subsidiaries may make and own
         Investments (w) consisting of Units issued for purposes of making
         acquisitions, (x) arising out of loans and advances by the Company to
         any Wholly-Owned Subsidiary incurred in the ordinary course of the
         Company's business as

                                      -4-
<PAGE>   5

         conducted through its Subsidiaries or to employees incurred in the
         ordinary course of business and consisting of advances to pay
         reimbursable expenditures, (y) arising out of extensions of trade
         credit or advances to third parties in the ordinary course of business
         and (z) acquired by reason of the exercise of customary creditors'
         rights upon default or pursuant to the bankruptcy, insolvency or
         reorganization of a debtor;"

         I-O. Section 6E(iii)(d)(1)(B) of each of the Outstanding Agreements is
hereby amended by inserting the word "unsecured" immediately preceding the
phrase "debt obligations of which".

         I-P. Clause (iii) of the proviso to Section 6E(v) of each of the
Outstanding Agreements is hereby amended by deleting the phrase "exceed
$3,000,000" and inserting in lieu thereof the following phrase "of determination
exceed 2% of Consolidated Net Tangible Assets (provided that the aggregate
amount of Investments permitted under this subclause (iii) shall not at any time
exceed $12,500,000)".

         I-Q. Section 6G(i) of each of the Outstanding Agreements is hereby
amended by inserting the phrase "and its Subsidiaries" immediately following the
phrase "less than the Consolidated Net Worth of the Company" in clauses
(b)(I)(x) and (c)(III)(x) thereof.

         I-R. Subsections (a), (b), (c) and (d) of Section 6G(iii) of each of
the Outstanding Agreements are hereby deleted in their entireties and the
following shall be substituted therefor:

         "(a) immediately after giving effect to such proposed disposition no
         Default or Event of Default shall exist and be continuing, satisfaction
         of this requirement to be set forth in reasonable detail in an
         Officer's Certificate delivered to each holder of a Note at the time of
         such transaction in the case of any Asset Sale involving assets that
         generate Consolidated EBITDA and involve consideration of $2,500,000 or
         more;

         (b) such sale or other disposition is for cash consideration or for
         consideration consisting of not less than 75% cash and not more than
         25% interest-bearing promissory notes; provided that the limitation
         described in this clause (b) shall not apply to any sale or other
         disposition generating less than $2,500,000 of Net Proceeds;

         (c) one of the following two conditions must be satisfied:

                  (I) (x) the aggregate Net Proceeds of all assets so disposed
                  of (whether or not leased back) over the immediately preceding
                  12-month period does not exceed $5,000,000 and (y) the
                  aggregate Net Proceeds of all assets so disposed of (whether
                  or not leased back) from the date of issue of the initial Note
                  under this Agreement through the date of such disposition does
                  not exceed $20,000,000; or

                                      -5-
<PAGE>   6

                  (II) in the event that such Net Proceeds (less the amount
                  thereof previously applied in accordance with clause (x) of
                  this clause (c)(II)) exceeds the limitations determined
                  pursuant to clauses (x) and (y) of clause (c)(I) of this
                  Section 6G (such excess amount being herein called "Excess
                  Sale Proceeds"), the Company shall within 12 calendar months
                  of the date on which such Net Proceeds exceeded any such
                  limitation, cause an amount equal to such Excess Sale Proceeds
                  to be applied (x) to the acquisition of assets in replacement
                  of the assets so disposed of or of assets which may be
                  productively used in the United States of America or Canada in
                  the conduct of the Business, or (y) to the extent not applied
                  pursuant to the immediately preceding clause (x), to offer to
                  make prepayments on the Notes pursuant to Section 4C hereto
                  and, allocated on the basis specified for such prepayments in
                  the definition of Allocable Proceeds, to offer to repay other
                  Parity Debt (other than Indebtedness under Section 6B(ii) or
                  that by its terms does not permit such offer to be made); and

         (d) such sale or other proposed disposition shall be for fair value and
         in the best interests of the Company, satisfaction of this requirement
         to be certified in an Officer's Certificate delivered to the
         Noteholders in the case of any Asset Sale involving assets that
         generate Consolidated EBITDA and involve consideration of $2,500,000 or
         more."

         I-S. Section 6I(i)(b)(y) of each of the Outstanding Agreements is
hereby amended by inserting the phrase "or a Wholly-Owned Subsidiary of the
General Partner" immediately following the phrase "Capital Stock of which was
purchased by the General Partner".

         I-T. Section 7A(iii) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$2,000,000" and inserting in lieu thereof
the following amount of "$5,000,000".

         I-U. Section 7A(xi) of each of the Outstanding Agreements is hereby
amended by deleting the reference to "$2,000,000" and inserting in lieu thereof
the following amount of "$5,000,000".

         I-V. Section 7A(xv) of each of the Outstanding Agreements is hereby
amended by (x) deleting the phrase "on the Closing Date" and inserting in lieu
thereof the phrase "from time to time and in accordance with Section 6H" and (y)
inserting the phrase "or U.S. Propane" immediately following the phrase ", or
(b) Heritage".

         I-W. Section 8B of each of the Outstanding Agreements is hereby amended
by inserting the phrase "(or, if applicable, U.S. Propane)" immediately
following (i) the phrase "of the Company is Heritage" and (ii) the phrase
"partners other than Heritage".

                                      -6-
<PAGE>   7

         I-X. Section 8C of each of the Outstanding Agreements is hereby amended
by inserting the phrase ", limited liability company" immediately following the
phrase "in good standing as a foreign corporation".

         I-Y. Section 8N of each of the Outstanding Agreements is hereby amended
by deleting the reference to "$2,000,000" and inserting in lieu thereof the
following amount of "$5,000,000".

         I-AA. Subsections (ii), (iii), (iv) and (v) of Section 8O of each of
the outstanding Agreements are hereby deleted in their entireties and the
following shall be substituted therefor:

                  "(ii) (a) There is no Hazardous Substance present at any of
         the real property currently owned or leased by the Company, any of its
         Subsidiaries or Heritage except to the extent that such presence could
         not reasonably be expected to have a Material Adverse Effect, and (b)
         to the knowledge of the Company, any of its Subsidiaries or Heritage,
         there was no Hazardous Substance present at any of the real property
         formerly owned or leased by the Company, any of its Subsidiaries or
         Heritage during the period of ownership or leasing by the Company, any
         of its Subsidiaries or Heritage except to the extent that such presence
         could not be reasonably expected to have a Material Adverse Effect; and
         with respect to such real property and subject to the same knowledge
         and temporal qualifiers concerning Hazardous Substances with respect to
         formerly owned or leased real properties, there has not occurred (x)
         any release, or to the knowledge of the Company, any of its
         Subsidiaries or Heritage, threatened release of a Hazardous Substance,
         or (y) any discharge or, to the knowledge of the Company, any of its
         Subsidiaries or Heritage, threatened discharge of any Hazardous
         Substance into the ground, surface or navigable waters which discharge
         or threatened discharge violates any federal, state, local or foreign
         laws, rules or regulations concerning water pollution, except to the
         extent that such release or discharge could not reasonably be expected
         to have a Material Adverse Effect.

                  (iii) None of the Company, any of its Subsidiaries or Heritage
         has disposed of, transported, or arranged for the transportation or
         disposal of any Hazardous Substance where such disposal,
         transportation, or arrangement would give rise to liability pursuant to
         CERCLA or any analogous state statute other than any such liabilities
         that could not reasonably be expected to have a Material Adverse
         Effect.

                  (iv) As of the date hereof: (a) no Lien has been asserted by
         any Governmental Authority or person resulting from the use, spill,
         discharge, removal, or remediation of any Hazardous Substance with
         respect to any real property currently owned or leased by the Company,
         any of its Subsidiaries or Heritage, and (b) to the knowledge of the
         Company, any of its Subsidiaries or Heritage, no such Lien was asserted
         with respect to any of the real property formerly owned or leased by
         Heritage during the period of ownership or leasing of the real property
         by such Person.

                                      -7-
<PAGE>   8

                  (v) (a) There are no underground storage tanks,
         asbestos-containing materials, polychlorinated biphenyls, or urea
         formaldehyde insulation at any of the real property currently owned or
         leased by the Company, any of its Subsidiaries or Heritage in violation
         of any Environmental Law, and (b) to the knowledge of the Company, any
         of its Subsidiaries or Heritage, there were no underground storage
         tanks, asbestos-containing materials, polychlorinated biphenyls, or
         urea formaldehyde insulation at any of the real property formerly owned
         or leased by Heritage in violation of any Environmental Law during the
         period of ownership or leasing of such real property by such Person."

         I-BB. The definition of "Reinvestment Yield" set forth in Section 10A
of each of the Outstanding Agreements is hereby amended by deleting the phrase
""678" on the Telerate" and inserting in lieu thereof the phrase ""PX1" on the
Bloomberg Financial Markets" in each place it shall occur.

         I-CC. Section 10B of each of the Outstanding Agreements is hereby
amended by deleting the definitions of "Acquisition Facility," "Administrative
Agent," "Bi-State," "Business," "Business Day," "Contracted Dollar," "Credit
Agreement," "Current Management," "General Partner," "PUCHA" and "Revolving
Working Capital Facility," contained therein and inserting in lieu thereof the
following definitions in the appropriate alphabetical position:

                  ""Acquisition Facility" shall mean the acquisition revolving
         credit facility of the Company provided for in the Credit Agreement for
         the purpose of financing acquisitions and improvements and repairs in
         the aggregate principal amount not to exceed $50,000,000."

                  ""Administrative Agent" shall mean Bank of Oklahoma, National
         Association (as successor to The First National Bank of Boston), as
         administrative agent under the Credit Agreement, together with its
         successors as such Administrative Agent."

                  ""Bi-State" shall mean Bi-State Propane, a California limited
         partnership."

                  ""Business" shall mean the business of wholesale and retail
         sales, storage, transportation and distribution of propane gas,
         providing repair, installation and maintenance services for propane
         heating systems; the sale and distribution of propane-related supplies
         and equipment (including appliances); the generation, transportation,
         sale, distribution and marketing relating thereto of propane-powered
         fuel cells, or the power generated therefrom and equipment related
         thereto, and the marketing of natural gas to any then current propane
         user in such areas where the Company operates from time to time,
         provided, that, with respect to such marketing, the Company shall act
         only as a marketing agent for a natural gas utility and shall receive a
         fee or other compensation for such services provided."

                                      -8-
<PAGE>   9

                  ""Business Day" shall mean any day other than a Saturday, a
         Sunday or a day on which commercial banks in New York City and Tulsa,
         Oklahoma are required or authorized to be closed."

                  ""Contracted Dollar" shall mean the sum of: $50,000,000 (which
         is the aggregate principal amount permitted with respect to the
         Acquisition Facility and any Indebtedness incurred for any permitted
         purpose which replaces, extends, renews, refunds or refinances any such
         Indebtedness); and (b) $10,000,000 (which is the aggregate principal
         amount permitted with respect to Indebtedness owing to sellers in Asset
         Acquisitions (in addition to permitted Non-Compete Obligations))."

                  ""Credit Agreement" shall mean the First Amended and Restated
         Credit Agreement dated as of May 31, 1999 among the Company, the agents
         listed therein and the financial institutions which are or become
         parties from time to time thereto, evidencing the Acquisition Facility
         and the Revolving Working Capital Facility, as the same may be amended,
         supplemented or otherwise modified from time to time in accordance with
         the terms thereof and hereof."

                  ""Current Management" shall mean not less than any two of the
         following: James E. Bertelsmeyer, R. C. Mills, H. Michael Krimbill,
         Brad Atkinson or Larry Dagley, together with the heirs of, and trusts
         for the benefit of family members controlled by, any such executive
         manager."

                  "General Partner" shall mean Heritage (or, if applicable, U.S.
         Propane) in its capacity as general partner of the Company."

                  "PUHCA" shall have the meaning specified in Section 8T."

                  ""Revolving Working Capital Facility" shall mean the
         $50,000,000 revolving credit facility of the Company provided for in
         the Credit Agreement for working capital and other general partnership
         purposes not to exceed $50,000,000 aggregate principal amount at any
         time outstanding."

         I-BB. Section 10B of each of the Outstanding Agreements is hereby
amended by inserting the definitions of "Contribution Agreement," "U.S. Propane"
and "U.S. Propane Acquisition" in the appropriate alphabetical positions:

                  ""Contribution Agreement" shall mean the Contribution
         Agreement, dated June 15, 2000, by and among U.S. Propane, the Company
         and the Master Partnership, as in effect on August 10, 2000."

                  ""U.S. Propane" shall mean U.S. Propane L.P., a Delaware
         limited partnership."

                  ""U.S. Propane Acquisition" shall mean the acquisition by the
         Company of certain Subsidiaries of U.S. Propane in accordance with the
         Contribution Agreement and the other transactions contemplated
         thereby."

                                      -9-
<PAGE>   10

         I-CC. Each of the Outstanding Agreements is hereby amended to add the
form of Schedule 8W attached to this Fourth Amendment Agreement.

                                   ARTICLE II
                    AMENDMENTS TO OUTSTANDING 1996 AGREEMENT

         II-A. Section 8 of the Outstanding 1996 Agreement is hereby amended by
inserting the following sections immediately after Section 8U thereof:

                  "Section 8V. Certain Representations of Company and General
         Partner. The representations and warranties of the Company and the
         General Partner contained in the Financing Documents (other than this
         Agreement) and those otherwise made in writing by or on behalf of the
         Company or the General Partner pursuant to such Financing Documents
         were true and correct when made and shall continue to be true and
         correct (unless stated to relate to a specific earlier date, in which
         case such representations and warranties shall be true and correct as
         of such earlier date).

                  Section 8W. Labor Matters. Except as set forth in Schedule 8W,
         (i) neither the Company nor any of its Subsidiaries is a party to any
         collective bargaining agreement or other contracts with a labor union
         or labor organization; and (ii) to the knowledge of the Company, there
         is no (1) unfair labor practice, labor dispute (other than routine
         individual grievances) or labor arbitration proceeding pending or
         threatened against the Company or its Subsidiaries, which, in the
         aggregate, could reasonably be expected to have a Material Adverse
         Effect, (2) activity or proceeding by a labor union or representative
         thereof to organize any employees of the Company or any of its
         Subsidiaries, (3) lockout, strike, slowdown, work stoppage or threat
         thereof by or with respect to any such employees or (4) material
         dispute, grievance or litigation relating to labor matters involving
         any employee. Each of the Company and its Subsidiaries is in compliance
         with all Applicable Laws regarding employment, employment practices,
         terms and conditions of employment and wages, except for such
         noncompliance which, in the aggregate, could not reasonably be expected
         to have a Material Adverse Effect."

                                   ARTICLE III
                    AMENDMENTS TO OUTSTANDING 1997 AGREEMENT

         III-A. Section 4C(iv) of the Outstanding 1997 Agreement is hereby
amended by inserting the phrase "or 4C(ii)" immediately following the phrase
"pursuant to Section 4C(i)".

         III-B. Subsection (x) of Section 4E of the Outstanding 1997 Agreement
is hereby amended by deleting the phrase "Default nor an Event of Default" and
inserting in lieu thereof the phrase "Default, an Event of Default nor a Debt
Rating Event."

                                      -10-
<PAGE>   11

         III-C. Subsection (y) of Section 4E of the Outstanding 1997 Agreement
is hereby amended by deleting the phrase "Default or an Event of Default" and
inserting in lieu thereof the phrase "Default, an Event of Default or a Debt
Rating Event."

         III-D. Section 5A(xi) of the Outstanding 1997 Agreement is hereby
amended by deleting the reference to "3L" and inserting in lieu thereof the
reference to "3K".

         III-E. Section 6C(viii) of the Outstanding 1997 Agreement is hereby
amended to (x) insert the phrase "after June 25, 1996" immediately following the
phrase "(viii) Liens created" and (y) to delete the phrase "after the Initial
Closing Date" immediately following the phrase "constructed by the Company or
any of its Subsidiaries".

         III-F. Section 8U of the Outstanding 1997 Agreement is hereby amended
by inserting the phrase "except for the Amendment Agreement to the Intercreditor
Agreement dated as of October 15, 1999," immediately following the phrase "to
the best knowledge of the Company".

         III-G. Section 8V of the Outstanding 1997 Agreement is hereby amended
by inserting the phrase "and shall continue to be true and correct (unless
stated to relate to a specific earlier date, in which case such representations
and warranties shall be true and correct as of such earlier date)" immediately
following the phrase "were true and correct when made".

         III-H. Section 8 of the Outstanding 1997 Agreement is hereby amended by
adding the following new Section 8W immediately following Section 8V thereof:

                  "Section 8W. Labor Matters. Except as set forth in Schedule
         8W, (i) neither the Company nor any of its Subsidiaries is a party to
         any collective bargaining agreement or other contracts with a labor
         union or labor organization; and (ii) to the knowledge of the Company,
         there is no (1) unfair labor practice, labor dispute (other than
         routine individual grievances) or labor arbitration proceeding pending
         or threatened against the Company or its Subsidiaries, which, in the
         aggregate, could reasonably be expected to have a Material Adverse
         Effect, (2) activity or proceeding by a labor union or representative
         thereof to organize any employees of the Company or any of its
         Subsidiaries, (3) lockout, strike, slowdown, work stoppage or threat
         thereof by or with respect to any such employees or (4) material
         dispute, grievance or litigation relating to labor matters involving
         any employee. Each of the Company and its Subsidiaries is in compliance
         with all Applicable Laws regarding employment, employment practices,
         terms and conditions of employment and wages, except for such
         noncompliance which, in the aggregate, could not reasonably be expected
         to have a Material Adverse Effect."

         III-I. Section 10B of the Outstanding 1997 Agreement is hereby amended
by inserting the definition of "Debt Rating Event" in the appropriate
alphabetical position:

                  ""Debt Rating Event" shall mean, as of any date of
         determination, (i) that the Notes or the 1996 Senior Secured Notes are
         rated less than BBB- by Fitch, Inc. (or comparably if the rating system
         is changed), and (ii) in the event

                                      -11-
<PAGE>   12

         that Fitch, Inc. shall no longer rate the Notes or the 1996 Senior
         Secured Notes, that the Notes or the 1996 Senior Secured Notes are no
         longer rated "2" or better by the National Association of Insurance
         Commissioners (NAIC)."

         III-J. The Outstanding 1997 Agreement is hereby amended to delete the
form of Schedule 6C attached thereto and insert in lieu thereof the form of
Schedule 6C attached to this Fourth Amendment.

                                   ARTICLE IV
                           CONDITIONS OF EFFECTIVENESS

         The effectiveness of this Fourth Amendment Agreement is subject to the
satisfaction of the following conditions:

                  (a) the Required Holders under each of the Outstanding
         Agreements shall have consented to this Fourth Amendment Agreement as
         evidenced by their execution thereof; and

                  (b) the requisite percentage of lenders under the Credit
         Agreement (the "Lenders") shall have agreed to all amendments necessary
         to effect this Fourth Amendment Agreement and a copy thereof shall have
         been provided to the holders of the Outstanding Notes. In the event the
         Company agrees that the Lenders or holders of any of the Outstanding
         Notes shall be granted any additional or more restrictive financial or
         negative covenants or events of default than the financial or negative
         covenants or events of default that are imposed on the Company under
         the Outstanding Agreements, as amended hereby, the Company agrees that
         the holders of all other Outstanding Notes shall also be granted such
         more restrictive covenants or events of defaults; and

                  (c) materials reasonably satisfactory to the holders of the
         Outstanding Notes shall have been delivered evidencing that the
         Proposed Reorganization has become effective.

                                    ARTICLE V
                    REPRESENTATIONS, WARRANTIES AND COVENANTS

         In order to induce the holders of the Notes to enter into this Fourth
Amendment Agreement, the Company represents and warrants that (a) no Default or
Event of Default has occurred and is continuing; and (b) after giving effect to
this Fourth Amendment Agreement, no Event of Default shall have occurred.

         The Company hereby agrees and covenants that within 10 Business Days
following the date that this Fourth Amendment Agreement becomes effective (i)
that it shall pay to each of the holders of the Outstanding Notes, an amendment
fee in an amount equal to .15% of the aggregate principal amount of the
Outstanding Notes held by such holder (the "Amendment Fee") and a Responsible
Officer of the Company shall have certified to each such holder that the Lenders
have received no amendment fees or other consideration greater than the
Amendment Fee and (ii) to the extent the Company has received a satisfactory
statement, that it shall pay all

                                      -12-
<PAGE>   13

reasonable fees and expenses of counsel to the holders of the Outstanding Notes
incurred in connection with this Fourth Amendment Agreement.

                                   ARTICLE VI
                                  MISCELLANEOUS

         VI-A. If the foregoing is acceptable to you, kindly note your
acceptance in the space provided below and upon satisfaction of the conditions
to effectiveness set forth in Article IV above.

         VI-B. This Fourth Amendment Agreement may be executed by the parties
hereto individually, or in any combination of the parties hereto in several
counterparts, all of which taken together shall constitute one and the same
Fourth Amendment Agreement.

         VI-C. Except as amended hereby, all of the representations, warranties,
provisions, covenants, terms and conditions of the Outstanding Agreements shall
remain unaltered and in full force and effect and the Outstanding Agreements, as
amended hereby, are in all respects agreed to, ratified and confirmed by the
Company. The Company acknowledges and agrees that the granting of amendments
herein shall not be construed as establishing a course of conduct on the part of
the holders of the Outstanding Notes upon which the Company may rely at any time
in the future.

         VI-D. Upon the effectiveness of this Fourth Amendment Agreement, each
reference in each Outstanding Agreement and in other documents describing or
referencing such Outstanding Agreement to "this Agreement," "hereunder,"
"hereof," "herein," or words of like import referring to such Outstanding
Agreement, shall mean and be a referenced to such Outstanding Agreement as
amended hereby.

                                      -13-
<PAGE>   14

                                Very truly yours,

                                HERITAGE OPERATING, L.P.

                                   By: Heritage Holdings, Inc., General Partner

                                   By:
                                       -----------------------------------------
                                   Its:
                                        ----------------------------------------

                                      -14-
<PAGE>   15

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

JOHN HANCOCK LIFE INSURANCE COMPANY

By:
    --------------------------------
Its:
     -------------------------------

JOHN HANCOCK VARIABLE LIFE INSURANCE
COMPANY

By:
    --------------------------------
Its:
     -------------------------------

MELLON BANK, N.A., solely in its capacity as
Trustee for the Long Term Investment Trust
(as directed by John Hancock Financial Services,
Inc.), and not in its individual capacity

By:
    --------------------------------
Its:
     -------------------------------

THE NORTHERN TRUST COMPANY, solely in
its capacity as Trustee of the Lucent Technologies Inc.
Master Pension Trust, and not in its individual capacity

By:  John Hancock Life Insurance Company,
     as Investment Manager

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   16

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

MASSACHUSETTS MUTUAL LIFE
INSURANCE COMPANY

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   17

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

PRINCIPAL LIFE INSURANCE COMPANY
(fka Principal Mutual Life Insurance Company)

By:  Principal Capital Management, LLC,
     its authorized signatory

By:
    --------------------------------
Its:
     -------------------------------

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   18

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

NEW YORK LIFE INSURANCE COMPANY

By:
    --------------------------------
Its:
     -------------------------------

NEW YORK LIFE INSURANCE AND
ANNUITY CORPORATION

By:  New York Life Insurance Company

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   19

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

TEACHERS INSURANCE AND ANNUITY
ASSOCIATION OF AMERICA

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   20

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

KEYPORT LIFE INSURANCE COMPANY

By:  Stein Roe & Farnham Incorporated, as Agent

By:
    -------------------------------------------
Its:
     ------------------------------------------

<PAGE>   21

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

J. ROMEO & CO.

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   22

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

PACIFIC LIFE INSURANCE COMPANY
(formerly Pacific Mutual Life Insurance Company)

By:
    --------------------------------
Its:
     -------------------------------

By:
    --------------------------------
Its:
     -------------------------------

PACIFIC LIFE INSURANCE COMPANY

By:
    --------------------------------
Its:
     -------------------------------

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   23

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

PHOENIX HOME LIFE MUTUAL INSURANCE
COMPANY

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   24

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

RELIASTAR LIFE INSURANCE COMPANY

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   25

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

PROTECTIVE LIFE INSURANCE COMPANY
(f/k/a Wisconsin National Life Insurance Company)

By:
    --------------------------------------------
Its:
     -------------------------------------------

<PAGE>   26

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

COLUMBIA UNIVERSAL LIFE INSURANCE
COMPANY

By:
    --------------------------------
Its:
     -------------------------------

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   27

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

ALLSTATE LIFE INSURANCE COMPANY

By:
    --------------------------------
Its:
     -------------------------------

By:
    --------------------------------
Its:
     -------------------------------

<PAGE>   28

         The foregoing Fourth Amendment Agreement and the amendments referred to
therein are hereby accepted and agree to as of August 10, 2000, and the
undersigned hereby confirms that on August 10, 2000 it held the aggregate
principal amount of Outstanding Notes of the Company set forth on Schedule 1
hereto and that on the date of execution hereof it continues to hold such
Outstanding Notes.

JEFFERSON PILOT FINANCIAL INSURANCE
COMPANY
(fka Chubb Life Insurance Company of America)

By:
    ----------------------------------------
Its:
     ---------------------------------------

<PAGE>   29

                                   SCHEDULE 1

<TABLE>
<CAPTION>
                                                                                    PRINCIPAL AMOUNT AND
                                                                                    SERIES OF OUTSTANDING
                NAME OF HOLDER                                                        NOTES HELD AS OF
             OF OUTSTANDING NOTES                                                      AUGUST 10, 2000
             --------------------                                                 ------------------------
<S>                                                                               <C>
John Hancock Life Insurance Company                                                $13,000,000  1996 Notes

John Hancock Life Insurance Company                                                 $8,000,000  1996 Notes

John Hancock Variable Life Insurance Company                                        $1,000,000  1996 Notes

Mellon Bank, N.A., Trustee for the Long-Term                                          $960,000  1996 Notes
Investment Trust (as directed by John Hancock
   Life Insurance Company)

The Northern Trust Company, as Trustee                                              $2,040,000  1996 Notes
   of the Lucent Technologies, Inc. Master
   Pension Trust

Massachusetts Mutual Life Insurance Company                                       $15,000,0000  1996 Notes

Principal Life Insurance Company (f/k/a                                            $15,000,000  1996 Notes
   Principal Mutual Life Insurance Company)

New York Life Insurance Company                                                    $12,500,000  1996 Notes

Teachers Insurance and Annuity Association of America                              $12,500,000  1996 Notes

Keyport Life Insurance Company                                                    $10,000,0000  1996 Notes

J. Romeo & Co.                                                                     $3,500,0000  1996 Notes

J. Romeo & Co.                                                                     $4,000,0000  1996 Notes

Pacific Life Insurance Company (f/k/a Pacific                                       $5,500,000  1996 Notes
   Mutual Life Insurance Company)

Phoenix Home Life Mutual Insurance Company                                          $5,000,000  1996 Notes

ReliaStar Life Insurance Company                                                    $5,000,000  1996 Notes

Columbia Universal Life Insurance Company                                           $2,000,000  1996 Notes
</TABLE>

<PAGE>   30

<TABLE>
<S>                                                                                 <C>
Allstate Life Insurance Company                                                     $2,000,000  1996 Notes

Protective Life Insurance Company (f/k/a                                            $3,000,000  1996 Notes
   Wisconsin National Life Insurance Company)

Pacific Life Insurance Company                                                     $12,000,000  Series A Notes

Pacific Life Insurance Company                                                      $8,000,000  Series B Notes

New York Life Insurance Company                                                     $5,000,000  Series B Notes

New York Life Insurance and                                                         $7,000,000  Series B Notes
   Annuity Corporation

Allstate Life Insurance Company                                                     $4,285,714.29  Series C Notes

Chubb Life Insurance Company                                                        $5,000,000  Series D Notes
   of America

J. Romeo & Co.                                                                      $5,000,000  Series E Notes
</TABLE>

<PAGE>   31

                                   SCHEDULE 6C

                                      LIENS

                                      None.

<PAGE>   32

                                   SCHEDULE 8W

                                  LABOR MATTERS

1.       Collective Bargaining Agreement between PNG Propane Company and Green's
         Fuel Company, Divisions of Piedmont Natural Gas Company, Inc. and Local
         1902, International Brotherhood of Electrical Workers.

2.       Labor Agreement between Peoples Gas and International Brotherhood of
         Electrical Workers, Local 2072, of Miami, Lakeland, Daytona Beach and
         Eustis, Florida.

Upon consummation of the U.S. Propane Acquisition, the Company believes that
neither it nor Subsidiaries will be subject to the above referenced Agreements.

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00014-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00014-of-00352.parquet"}]]