EXHIBIT 1.1

                                                                  EXECUTION COPY


                                  $175,000,000

                                KCS ENERGY, INC.

                            7 1/8% SENIOR NOTES DUE 2012


                               PURCHASE AGREEMENT

                                                                  March 25, 2004

CREDIT SUISSE FIRST BOSTON LLC
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
JEFFERIES & COMPANY, INC.
HARRIS NESBITT CORP.
BANC ONE CAPITAL MARKETS, INC.
BNP PARIBAS SECURITIES CORP.
c/o:     Credit Suisse First Boston LLC
         Eleven Madison Avenue
         New York, New York 10010-3629

Dear Sirs:

         1. Introductory. KCS Energy, Inc., a Delaware corporation (the
"COMPANY"), proposes, subject to the terms and conditions stated herein, to
issue and sell to the several initial purchasers named in Schedule A hereto (the
"PURCHASERS") U.S.$175,000,000 aggregate principal amount of its 7 1/8% Senior
Notes due 2012 (the "OFFERED SECURITIES") to be issued under an indenture, dated
as of April 1, 2004 (the "INDENTURE"), among the Company, KCS Resources, Inc., a
Delaware corporation, Medallion California Properties Company, a Texas
corporation, KCS Energy Services, Inc., a Delaware corporation, and Proliq,
Inc., a New Jersey corporation (collectively, the "GUARANTORS") and U.S. Bank
National Association, as Trustee.

         The holders of the Offered Securities will be entitled to the benefits
of a Registration Rights Agreement, to be dated as of the Closing Date (as
defined below), among the Company, the Guarantors and the Purchasers (the
"REGISTRATION RIGHTS AGREEMENT"), pursuant to which the Company agrees to file a
registration statement with the Securities Exchange Commission (the
"COMMISSION") registering the resale of the Offered Securities under the United
States Securities Act of 1933, as amended (the "SECURITIES ACT").

         The Company and the Guarantors hereby agree with the several Purchasers
as follows:

         2. Representations and Warranties of the Company and the Guarantors.
The Company and the Guarantors, jointly and severally, represent and warrant to,
and agree with, the several Purchasers that:

                  (a) A preliminary offering circular and an offering circular
         relating to the Offered Securities to be offered by the Purchasers have
         been prepared by the Company. Such preliminary offering circular and
         offering circular (the "OFFERING CIRCULAR"), as supplemented as of the
         date of this Agreement, together with any other document approved by
         the Company for use in connection with the contemplated resale of the
         Offered Securities are hereinafter collectively referred to as the
         "OFFERING DOCUMENT." On the date of this Agreement, the Offering
         Document does not include any untrue statement of a material fact or
         omit to state any material fact required to be stated therein or
         necessary in order to make the statements therein, in the light of the
         circumstances under which they were made, not misleading. The preceding
         sentence does not apply to statements in or omissions from the Offering
         Document based upon written information furnished to the Company by any
         Purchaser through Credit Suisse First Boston LLC ("CSFB") specifically
         for use therein, it being understood and agreed that the only such
         information is that described as such in Section 7(b) hereof. Except as
         disclosed in the Offering Document, on the date of this Agreement, the
         Company's Annual Report on Form 10-K most recently filed with the
         Commission and all subsequent reports (collectively, the "EXCHANGE ACT
         REPORTS") that have been filed by the Company with the Commission or
         sent to stockholders pursuant to the Securities Exchange Act of 1934
         (the "EXCHANGE ACT") do not include any untrue statement of a material
         fact or omit to state any material fact necessary to make the
         statements therein, in




         the light of the circumstances under which they were made, not
         misleading. Such documents, when they were filed with the Commission,
         conformed in all material respects to the requirements of the Exchange
         Act and the rules and regulations of the Commission thereunder.

                  (b) The Company has been duly incorporated and is a validly
         existing corporation in good standing under the laws of the State of
         Delaware, with corporate power and authority to own or lease and
         operate its properties and conduct its business as described in the
         Offering Document and to enter into and perform its obligations under
         this Agreement; the Company is duly qualified to transact business as a
         foreign corporation and is in good standing in all other jurisdictions
         in which its ownership or lease of property or the conduct of its
         business requires such qualification, except where the failure to be so
         qualified would not have a material adverse effect on the condition
         (financial or other), business, properties or results of operations of
         the Company and its subsidiaries taken as a whole ("MATERIAL ADVERSE
         EFFECT"); and, to the Company's knowledge, no proceeding has been
         instituted in any jurisdiction revoking, limiting or curtailing or
         seeking to revoke, limit or curtail, such power and authority or
         qualification; and the Company does not own, lease or license any asset
         or property or conduct any material business outside of the United
         States.

                  (c) The entities listed on Schedule B hereto are the only
         subsidiaries, direct or indirect, of the Company (the "SUBSIDIARIES").

                  (d) Each Subsidiary has been duly incorporated and is a
         validly existing corporation in good standing under the laws of the
         jurisdiction of its incorporation, with corporate power and authority
         to own and lease and operate its properties and conduct its business as
         described in the Offering Document and to enter into and perform its
         obligations under this Agreement; each Subsidiary is duly qualified to
         transact business as a foreign corporation in good standing in all
         other jurisdictions in which its ownership or lease of property or the
         conduct of its business requires such qualification, except where the
         failure to be so qualified would not have a Material Adverse Effect;
         and all of the issued and outstanding capital stock of each Subsidiary
         has been duly authorized and validly issued and is fully paid and
         nonassessable and is owned by the Company, directly or through
         subsidiaries, free from liens, encumbrances and defects, except for
         liens resulting from the Company's credit facility and pledges under
         such credit facility.

                  (e) Except for the Registration Rights Agreement, there are no
         contracts, agreements or understandings between the Company or any
         Subsidiary and any person granting such person the right to require the
         Company or such Subsidiary to file a registration statement under the
         Securities Act with respect to any securities of the Company or such
         Subsidiary or to require the Company or such Subsidiary to include such
         securities with the Offered Securities and Subsidiary Guarantees
         registered pursuant to any registration statement.

                  (f) The Indenture has been duly authorized by all necessary
         corporate action; the Offered Securities have been duly authorized by
         all necessary corporate action; and when the Offered Securities are
         delivered and paid for pursuant to this Agreement on the Closing Date
         (as defined in Section 3), the Indenture will have been duly executed
         and delivered, such Offered Securities will have been duly executed,
         authenticated, issued and delivered and will conform in all material
         respects to the description thereof contained in the Offering Document
         and the Indenture and such Offered Securities will constitute valid and
         legally binding obligations of the Company, enforceable in accordance
         with their terms, subject to bankruptcy, insolvency, fraudulent
         transfer, reorganization, moratorium and similar laws of general
         applicability relating to or affecting creditors' rights and to general
         equity principles.

                  (g) On the Closing Date, the Indenture will conform in all
         material respects to the requirements of the United States Trust
         Indenture Act of 1939, as amended (the "TRUST INDENTURE ACT"), and the
         rules and regulations of the Commission applicable to an indenture
         which is qualified thereunder.

                  (h) On the Closing Date, the Exchange Securities (as defined
         in the Registration Rights Agreement) will have been duly authorized by
         the Company and the Guarantors; and when the Exchange Securities are
         issued, executed and authenticated in accordance with the terms of the
         Registration Rights Agreement and the Indenture, the Exchange
         Securities will be entitled to the benefits of the Indenture and will
         be the valid and legally binding obligations of the Company and the
         Guarantors, enforceable in accordance with their



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         terms, subject to bankruptcy, insolvency, fraudulent transfer,
         reorganization, moratorium and similar laws of general applicability
         relating to or affecting creditors' rights and to general equity
         principles.

                  (i) The Subsidiary Guarantee (as defined in the Indenture) to
         be endorsed on the Exchange Securities by each Guarantor has been duly
         authorized by such Guarantor and, when issued, will have been duly
         executed and delivered by each such Guarantor and will conform to the
         description thereof contained in the Offering Document; and when the
         Exchange Securities have been issued, executed and authenticated in
         accordance with the terms of the Registration Rights Agreement and the
         Indenture, the Subsidiary Guarantee of each Guarantor endorsed thereon
         will constitute valid and legally binding obligations of such
         Guarantor, enforceable in accordance with its terms, subject to
         bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium
         and similar laws of general applicability relating to or affecting
         creditors' rights and to general equity principles.

                  (j) There are no contracts, agreements or understandings
         between the Company and any person that would give rise to a valid
         claim against the Company or any Purchaser for a brokerage commission,
         finder's fee or other like payment, other than the fees and
         compensation to be paid to the Purchasers in accordance with this
         Agreement.

                  (k) The Registration Rights Agreement has been duly authorized
         by the Company and each of the Guarantors and, on the Closing Date,
         will have been duly executed and delivered by the Company and each of
         the Guarantors; when the Registration Rights Agreement has been duly
         executed and delivered by the Company and the Guarantors and duly
         authorized, executed and delivered by the Purchasers, the Registration
         Rights Agreement will be a valid and binding agreement of the Company
         and each of the Guarantors, enforceable against the Company and each
         Guarantor in accordance with its terms, subject to bankruptcy,
         insolvency, fraudulent transfer, reorganization, moratorium and similar
         laws of general applicability relating to or affecting creditors'
         rights and to general equity principles; and on the Closing Date, the
         Registration Rights Agreement will conform in all material respects as
         to legal matters to the description thereof in the Offering Circular.

                  (l) No consent, approval, authorization, or order of, or
         filing with, any governmental agency or body or any court is required
         for the consummation of the transactions contemplated by this Agreement
         or the Registration Rights Agreement in connection with the issuance
         and sale of the Offered Securities by the Company except for (i) such
         consents as may be required under applicable state securities laws in
         connection with the purchase and resale of the Notes by the Purchasers
         and (ii) such consents, with respect to the Exchange Securities
         (including the related Guarantee), as may be required under applicable
         state securities laws and the Securities Act, including the order of
         the Commission declaring the Exchange Offer Registration Statement or
         the Shelf Registration Statement (each as defined in the Registration
         Rights Agreement) effective.

                  (m) Neither the Company nor any of the Subsidiaries is in
         violation of its respective charter or by-laws or in default in the
         performance of any obligation, agreement, covenant or condition
         contained in any indenture, loan agreement, mortgage, lease or other
         agreement or instrument that is material to the Company and the
         Subsidiaries, taken as a whole, to which the Company or any of the
         Subsidiaries is a party or by which the Company or any of the
         Subsidiaries or their respective property is bound (collectively,
         "AGREEMENTS AND INSTRUMENTS"), except for such defaults that would not
         result in a Material Adverse Effect; the execution, delivery and
         performance by the Company of its obligations under the Indenture, this
         Agreement and the Registration Rights Agreement, and the issuance and
         sale of the Offered Securities and compliance with the terms and
         provisions thereof, do not and will not, whether with or without the
         giving of notice or passage of time or both, conflict with or
         constitute a breach of, or default or Repayment Event (as defined
         below) under, or result in the creation or imposition of any lien,
         charge or encumbrance upon any property or assets of the Company or any
         of the Subsidiaries pursuant to, the Agreements and Instruments, nor
         will such action result in any violation of (i) the provisions of the
         charter or by-laws of the Company or any of the Subsidiaries or (ii)
         any applicable law, statute, rule, regulation, judgment, order, writ or
         decree of any government, government instrumentality or court, domestic
         or foreign, having jurisdiction over the Company or any of the
         Subsidiaries or any of their assets, properties or operations, which
         violations, in the case of clause (ii), would, individually or in the
         aggregate, either have a Material Adverse Effect or a material adverse
         effect on the consummation of the transactions contemplated herein; and
         the Company has full power and authority to authorize, issue and sell
         the Offered Securities as contemplated by this Agreement.




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         As used herein, "REPAYMENT EVENT" means any event or condition that
         gives the holder of any note, debenture or other evidence of
         indebtedness (or any person acting on such holder's behalf) the right
         to require the repurchase, redemption or repayment of all or a portion
         of such indebtedness by the Company or any of the Subsidiaries.

                  (n) This Agreement has been duly authorized, executed and
         delivered by the Company and each of the Guarantors.

                  (o) The Company and the Subsidiaries have good and
         indefeasible title to all of their interests in oil and gas properties
         (other than interests earned under farm-out, participation or similar
         agreements in which an assignment or transfer is pending) and all other
         real property owned by the Company and the Subsidiaries and good title
         to all other properties owned by them, in each case, free and clear of
         all mortgages, pledges, liens, security interests, claims, restrictions
         or encumbrances of any kind except such as (i) are described in the
         Offering Document, (ii) liens and encumbrances under operating
         agreements, unitization and pooling agreements, production sales
         contracts, farm-out agreements and other oil and gas exploration
         participation and production agreements, in each case that secure
         payment of amounts not yet due and payable for the performance of other
         unmatured obligations and are of a scope and nature customary in the
         oil and gas industry or arise in connection with drilling and
         production operations, or (iii) do not, individually or in the
         aggregate, materially affect the value of the affected property and do
         not interfere with the use made and proposed to be made of such
         property by the Company or the Subsidiaries, as the case may be; all of
         the leases and subleases of real property that are material to the
         business of the Company or any of the Subsidiaries and under which the
         Company or any of the Subsidiaries holds properties described in the
         Offering Document, are in full force and effect, and neither the
         Company nor any of the Subsidiaries has received notice of any material
         claim of any sort that has been asserted by anyone adverse to the
         rights of the Company or any of the Subsidiaries under any of such
         leases or subleases, or affecting or questioning the rights of the
         Company or such Subsidiary to the continued possession of the leased or
         subleased premises under any such lease or sublease.

                  (p) The Company and the Subsidiaries possess such permits,
         licenses, approvals, consents and other authorizations (collectively,
         "GOVERNMENTAL LICENSES") issued by the appropriate federal, state,
         local or foreign regulatory agencies or bodies necessary to conduct the
         business in the manner described in the Offering Document, subject to
         such qualifications as may be set forth in the Offering Document and
         except for such Governmental Licenses which, if not obtained, would
         not, individually or in the aggregate, have a Material Adverse Effect;
         the Company and the Subsidiaries are in compliance with the terms and
         conditions of all such Governmental Licenses, subject to such
         qualifications as may be set forth in the Offering Document and except
         for such noncompliance which would not, individually or in the
         aggregate, have a Material Adverse Effect; all of the Governmental
         Licenses are valid and in full force and effect, subject to such
         qualifications as may be set forth in the Offering Document and except
         for such Governmental Licenses which, if not valid and in full force
         and effect, would not, individually or in the aggregate, have a
         Material Adverse Effect; and neither the Company nor any of the
         Subsidiaries has received any notice of proceedings relating to the
         revocation or modification of any such certificate, authority or permit
         that, if determined adversely to the Company or any of the
         Subsidiaries, would, individually or in the aggregate, have a Material
         Adverse Effect.

                  (q) No labor dispute with the employees of the Company or any
         Subsidiary exists or, to the knowledge of the Company, is imminent that
         could reasonably be expected to result in a Material Adverse Effect.

                  (r) The Company and the Subsidiaries own or possess, or can
         acquire on reasonable terms, adequate trademarks, trade names and other
         rights to inventions, know-how (including unpatented and/or
         unpatentable proprietary or confidential information, systems or
         procedures), patents, copyrights, confidential information and other
         intellectual property (collectively, "INTELLECTUAL PROPERTY RIGHTS")
         necessary to conduct the business now operated by them, or presently
         employed by them, and have not received any notice of infringement of
         or conflict with asserted rights of others with respect to any
         intellectual property rights that, if determined adversely to the
         Company or any of the Subsidiaries, would, individually or in the
         aggregate, have a Material Adverse Effect.



                                       4


                  (s) (i) neither the Company nor any of the Subsidiaries is in
         violation of any federal, state, local or foreign statute, law, rule,
         regulation, ordinance, code, policy or rule of common law or any
         judicial or administrative interpretation thereof, including any
         judicial or administrative order, consent, decree or judgment, relating
         to pollution or protection of human health, the environment (including,
         without limitation, ambient air, surface water, groundwater, land
         surface or subsurface strata) or wildlife, including, without
         limitation, laws and regulations relating to the release or threatened
         release of chemicals, pollutants, contaminants, wastes, toxic
         substances, hazardous substances, petroleum or petroleum products
         (collectively, "HAZARDOUS MATERIALS") or to the manufacture,
         processing, distribution, use, treatment, storage, disposal, transport
         or handling of Hazardous Materials (collectively, "ENVIRONMENTAL
         LAWS"); (ii) the Company and the Subsidiaries have all permits,
         authorizations and approvals required under any applicable
         Environmental Laws and are each in compliance with their requirements;
         (iii) to the knowledge of the Company, there are no pending or
         threatened administrative, regulatory or judicial actions, suits,
         demands, demand letters, claims, liens, notices of noncompliance or
         violation, investigation or proceedings relating to any Environmental
         Law against the Company or any of the Subsidiaries; and (iv) there are
         no events or circumstances that could reasonably be expected to form
         the basis of an order for clean-up or remediation, or an action, suit
         or proceeding by any private party or governmental body or agency,
         against or affecting the Company or any of the Subsidiaries relating to
         Hazardous Materials or any Environmental Laws, except in the case of
         clauses (i), (ii), (iii) or (iv) where such violation, failure to
         receive required permits, authorizations and approvals or failure to
         comply with the requirements of such permits, authorizations and
         approvals, action or liabilities related to Hazardous Materials or any
         Environmental Laws would not, individually or in the aggregate, have a
         Material Adverse Effect.

                  (t) As of the date hereof, (i) all royalties, rentals,
         deposits and other amounts owed under the oil and gas leases
         constituting the oil and gas properties of the Company and the
         Subsidiaries have been properly and timely paid (other than amounts
         held in routine suspense accounts pending payments), and no material
         amount of proceeds from the sale or production attributable to the oil
         and gas properties of the Company and the Subsidiaries are currently
         being held in suspense by any purchaser thereof, except where such
         amounts due could not, individually or in the aggregate, have a
         Material Adverse Effect on the Company or any of the Subsidiaries, and
         (ii) there are no claims under take-or-pay contracts pursuant to which
         natural gas purchasers have any make-up rights affecting the interests
         of the Company or the Subsidiaries in their oil and gas properties,
         except where such claims could not, individually or in the aggregate,
         have a Material Adverse Effect on the Company or any of the
         Subsidiaries.

                  (u) There are no pending actions, suits or proceedings against
         or affecting the Company, any of the Subsidiaries or any of their
         respective properties that, if determined adversely to the Company or
         any of the Subsidiaries, that, individually or in the aggregate, would
         reasonably be expected to have a Material Adverse Effect, or that might
         reasonably be expected to materially and adversely affect the ability
         of the Company or any Guarantor to perform its obligations under the
         Indenture, this Agreement or the Registration Rights Agreement, or
         which are otherwise material in the context of the sale of the Offered
         Securities; to the Company's knowledge, no such actions, suits or
         proceedings are threatened or contemplated; and the aggregate of all
         pending legal or governmental proceedings to which the Company or any
         of the Subsidiaries is a party or of which any of their respective
         properties or assets is the subject that are not described in the
         Offering Document, including ordinary routine litigation incidental to
         the business, could not reasonably be expected to result in a Material
         Adverse Effect.

                  (v) The financial statements included in the Offering
         Document, together with the related schedules and notes thereto,
         present fairly the financial position of the Company and its
         consolidated subsidiaries as of the dates shown and their results of
         operations and cash flows for the periods shown, and, except as
         otherwise disclosed in the Offering Document, such financial statements
         have been prepared in conformity with the generally accepted accounting
         principles in the United States ("GAAP") applied on a consistent basis
         throughout the periods involved.

                  (w) Since the date of the latest audited financial statements
         included in the Offering Document, there has been no material adverse
         change, nor any development or event involving a prospective material
         adverse change, in the condition (financial or other), business,
         properties, results of operations or business prospects of the Company
         and the Subsidiaries taken as a whole; the Company and the Subsidiaries
         have not incurred any



                                       5



         liability or obligations, direct or contingent, nor entered into any
         transaction, other than those in the ordinary course of business, which
         are material with respect to the Company or the Subsidiaries; there has
         been no dividend or distribution of any kind declared, paid or made by
         the Company on any class of its capital stock; and there has not been
         any material adverse change in the capital stock, short-term debt or
         long term debt of the Company or any of the Subsidiaries.

                  (x) The Company is subject to the reporting requirements of
         either Section 13 or Section 15(d) of the Exchange Act and files
         reports with the Commission on the Electronic Data Gathering, Analysis,
         and Retrieval (EDGAR) system.

                  (y) Neither the Company nor any of the Guarantors is an
         open-end investment company, unit investment trust or face-amount
         certificate company that is, or is required to be, registered under
         Section 8 of the United States Investment Company Act of 1940 (the
         "INVESTMENT COMPANY ACT"); and the Company and each of the Guarantors
         are not and, after giving effect to the offering and sale of the
         Offered Securities and the application of the proceeds thereof as
         described in the Offering Document, will not be an "investment company"
         as defined in the Investment Company Act.

                  (z) No securities of the same class (within the meaning of
         Rule 144A(d)(3) under the Securities Act) as the Offered Securities are
         listed on any national securities exchange registered under Section 6
         of the Exchange Act or quoted in a U.S. automated inter-dealer
         quotation system.

                  (aa) Neither the Company nor any of the Subsidiaries nor any
         agent thereof acting on the behalf of them has taken, and none of them
         will take, any action that could reasonably be expected to cause this
         Agreement or the issuance or sale of the Offered Securities to violate
         Regulation T, Regulation U or Regulation X of the Board of Governors of
         the Federal Reserve System.

                  (bb) No "nationally recognized statistical rating
         organization" as such term is defined for purposes of Rule 436(g)(2)
         under the Securities Act (i) has imposed (or has informed the Company
         or any Guarantor that it is considering imposing) any condition
         (financial or otherwise) on the Company's or any Guarantor's retaining
         any rating assigned to the Company or any Guarantor, any securities of
         the Company or any Guarantor or (ii) has indicated to the Company or
         any Guarantor that it is considering (A) the downgrading, suspension,
         or withdrawal of, or any review for a possible change that does not
         indicate the direction of the possible change in, any rating so
         assigned or (B) any change in the outlook for any rating of the
         Company, any Guarantor or any securities of the Company or any
         Guarantor.

                  (cc) No form of general solicitation or general advertising
         (as defined in Regulation D under the Securities Act) was used by the
         Company, the Guarantors or any of their respective representatives
         (other than the Purchasers, as to whom the Company and the Guarantors
         make no representation or warranty) in connection with the offer and
         sale of the Offered Securities contemplated hereby, including, but not
         limited to, articles, notices or other communications published in any
         newspaper, magazine, or similar medium or broadcast over television or
         radio, or any seminar or meeting whose attendees have been invited by
         any general solicitation or general advertising.

                  (dd) The sale of the Offered Securities pursuant to Regulation
         S under the Securities Act ("REGULATION S") is not part of a plan or
         scheme to evade the registration provisions of the Securities Act.

                  (ee) No registration under the Securities Act of the Offered
         Securities or the Subsidiary Guarantees is required for the sale of the
         Offered Securities and the Subsidiary Guarantees to the Purchasers as
         contemplated hereby or for the Exempt Resales assuming the accuracy of
         the Purchaser's representations set forth in Section 4 hereof.

                  (ff) Neither the Company, nor any of its affiliates, nor any
         person acting on its or their behalf (i) has, within the six-month
         period prior to the date hereof, offered or sold in the United States
         or to any U.S. person (as such terms are defined in Regulation S under
         the Securities Act) the Offered Securities or any security of the same
         class or series as the Offered Securities or (ii) has offered or will
         offer or sell the Offered Securities (A) in the United States by means
         of any form of general solicitation or general advertising within the
         meaning of Rule 502(c) under the Securities Act or (B) with respect to
         any such securities sold in reliance on Rule 903



                                       6


         of Regulation S, by means of any directed selling efforts within the
         meaning of Rule 902(c) of Regulation S. The Company, its affiliates and
         any person acting on its or their behalf (other than the Purchasers, as
         to whom the Company and the Guarantors make no representation) have
         complied and will comply with the offering restrictions requirement of
         Regulation S. The Company has not entered and will not enter into any
         contractual arrangement with respect to the distribution of the Offered
         Securities except for this Agreement.

                  (gg) Ernst & Young LLP, which is reporting on certain of the
         audited financial statements of the Company included in the Offering
         Document, are independent public accountants within the meaning of the
         Securities Act; and Arthur Andersen LLP, who certified certain of the
         financial statements included in the Offering Document, were at the
         time of the certification of such reports independent public
         accountants as required by the Securities Act.

                  (hh) There are no contracts or documents that are required to
         be described in the Offering Document or the documents incorporated by
         reference therein or to be filed as exhibits thereto that have not been
         so described and filed as required.

                  (ii) The statistical and market-related data included or
         incorporated by reference in the Offering Document are based on or
         derived from sources that the Company believes to be reliable and
         accurate or represent the Company's good faith estimates that are made
         on the basis of data derived from such sources.

                  (jj) All United States federal income tax returns of the
         Company and the Subsidiaries required by law to be filed have been
         filed (or extensions with respect to such tax returns have been
         obtained); all taxes shown by such filed tax returns or otherwise
         assessed, that are due and payable, have been paid, except those which
         are being contested in good faith and as to which adequate reserves
         have been provided in accordance with generally accepted accounting
         principles; the Company has not received any notice from the Internal
         Revenue Service that it intends to audit the Company's federal income
         tax returns for any year during the three year period ended December
         31, 2003 and no audit proceeding by the Internal Revenue Service has
         been conducted during such period; the Company and the Subsidiaries
         have filed all other tax returns (or obtained extensions with respect
         to such tax returns) that are required to have been filed by them
         pursuant to applicable foreign, state, local or other law, and have
         paid all taxes due pursuant to such returns or pursuant to any
         assessment received by the Company and the Subsidiaries, except those
         which are being contested in good faith and as to which adequate
         reserves have been provided in accordance with generally accepted
         accounting principles; and the charges, accruals and reserves on the
         books of the Company in respect of any income and corporation tax
         liability for any years not finally determined are adequate in all
         material respects to meet any assessments or reassessments for
         additional income tax for any years not finally determined.

                  (kk) The Company and the Subsidiaries carry or are covered by
         insurance, with financially sound and reputable insurers, in such
         amounts and covering such risks as is generally maintained by companies
         similar to the Company engaged in the same or similar business, and all
         such insurance is in full force and effect.

                  (ll) No relationship, direct or indirect, exists between or
         among any of the Company or any affiliate of the Company, on the one
         hand, and any director, officer, stockholder, customer or supplier of
         any of them, on the other hand, which is required by the Exchange Act
         to be described in the Company's Annual Report on Form 10-K for the
         year ended December 31, 2003, which is not so described or is not
         described as required.

                  (mm) The written engineering report audited by Netherland,
         Sewell & Associates, Inc., an oil and gas engineering consulting firm
         ("NSAI"), dated February 19, 2004, setting forth the proved reserves
         attributed to the oil and gas properties of the Company and the
         Subsidiaries accurately reflect in all material respects the ownership
         interests of the Company and the Subsidiaries in the properties therein
         as of December 31, 2003, except as otherwise disclosed in the Offering
         Document; the information furnished by the Company to NSAI for purposes
         of conducting its audit, including, without limitation, production,
         costs of operation and development, current prices for production,
         agreements relating to current and future operations and sales of
         production, was true, correct and complete in all material respects on
         the date supplied and was prepared in accordance with customary
         industry practices, as indicated in the letter of NSAI dated February
         13, 2004; and NSAI is independent with respect to the Company.



                                       7


                  (nn) The principal executive officer and principal financial
         officer of the Company have made all certifications required by the
         Sarbanes-Oxley Act of 2002 (the "SARBANES-OXLEY ACT") or any related
         rules and regulations promulgated by the Commission, and the statements
         contained in any such certification are complete and correct; the
         Company maintains "disclosure controls and procedures" (as defined in
         Rule 13a-15(e) under the Exchange Act), and such controls and
         procedures are designed (i) to ensure that material information
         required to be disclosed by the Company in the reports that it files or
         submits under the Exchange Act is recorded, processed, summarized and
         reported, within the time periods specified in the Commission's rules
         and forms and (ii) to ensure that material information required to be
         disclosed by the Company in the reports that it files or submits under
         the Exchange Act is accumulated and communicated to the Company's
         management, including its principal executive officer and principal
         financial officer, as appropriate to allow timely decisions regarding
         required disclosure; the Company does not have any material weaknesses
         in internal control over financial reporting (as defined in Rule
         13a-15(f) under the Exchange Act), and there has been no fraud, whether
         or not material, that involves management or other employees who have a
         significant role in the Company's internal control over financial
         reporting (as defined in Rule 13a-15(f) under the Exchange Act); and
         the Company is otherwise in compliance in all material respects with
         all applicable effective provisions of the Sarbanes-Oxley Act and the
         rules and regulations promulgated by the Commission.

         3. Purchase, Sale and Delivery of Offered Securities. On the basis of
the representations, warranties and agreements herein contained, but subject to
the terms and conditions herein set forth, the Company agrees to sell to the
Purchasers, and the Purchasers agree, severally and not jointly, to purchase
from the Company, at a purchase price of 97.75% of the principal amount thereof
plus accrued interest from April 1, 2004 to the Closing Date (as defined below),
the respective principal amounts of the Offered Securities set forth opposite
the names of the several Purchasers in Schedule A hereto.

         The Company will deliver against payment of the purchase price the
Offered Securities to be offered and sold by the Purchasers in reliance on
Regulation S (the "REGULATION S SECURITIES") in the form of one or more
permanent global Securities in registered form without interest coupons (the
"REGULATION S GLOBAL SECURITIES"), which will be deposited with the Trustee as
custodian for The Depository Trust Company ("DTC") and registered in the name of
Cede & Co., as nominee for DTC. The Company will deliver against payment of the
purchase price the Offered Securities to be purchased by each Purchaser
hereunder and to be offered and sold by each Purchaser in reliance on Rule 144A
under the Securities Act (the "144A SECURITIES") in the form of one or more
permanent global securities in definitive form without interest coupons (the
"RESTRICTED GLOBAL SECURITIES") deposited with the Trustee as custodian for DTC
and registered in the name of Cede & Co., as nominee for DTC. The Regulation S
Global Securities and the Restricted Global Securities shall be assigned
separate CUSIP numbers. The Restricted Global Securities shall include the
legend regarding restrictions on transfer set forth under "Transfer
Restrictions" in the Offering Document.

         Payment for the Regulation S Securities and the 144A Securities shall
be made by the Purchasers in Federal (same day) funds by wire transfer to an
account at a bank acceptable to CSFB drawn to the order of the Company at the
office of Vinson & Elkins L.L.P. at 9:00 A.M. (New York time), on April 1, 2004,
or at such other time not later than five full business days thereafter as CSFB
and the Company determine, such time being herein referred to as the "CLOSING
DATE," against delivery to the Trustee as custodian for DTC of (i) the
Regulation S Global Securities representing all of the Regulation S Securities
and (ii) the Restricted Global Securities representing all of the 144A
Securities. The Regulation S Global Securities and the Restricted Global
Securities will be made available for checking at the above office of Vinson &
Elkins L.L.P. at least 24 hours prior to the Closing Date.

         4. Representations by Purchasers; Resale by Purchasers.

                  (a) Each Purchaser severally represents and warrants to the
         Company that it is an "accredited investor" within the meaning of
         Regulation D under the Securities Act.

                  (b) Each Purchaser severally acknowledges that the Offered
         Securities have not been registered under the Securities Act and may
         not be offered or sold within the United States or to, or for the
         account or benefit of, U.S. persons except in accordance with
         Regulation S or pursuant to an exemption from the registration
         requirements of the Securities Act. Each Purchaser severally represents
         and agrees that it has offered and sold the Offered Securities, and
         will offer and sell the Offered Securities (i) as part of its
         distribution at any time and (ii) otherwise until 40 days after the
         later of the commencement of the offering and the Closing Date, only in



                                       8


         accordance with Rule 903 or Rule 144A under the Securities Act ("RULE
         144A"). Accordingly, neither such Purchaser nor its affiliates, nor any
         persons acting on its or their behalf, have engaged or will engage in
         any directed selling efforts with respect to the Offered Securities,
         and such Purchaser, its affiliates and all persons acting on its or
         their behalf have complied and will comply with the offering
         restrictions requirement of Regulation S. Each Purchaser severally
         agrees that, at or prior to confirmation of sale of the Offered
         Securities, other than a sale pursuant to Rule 144A, such Purchaser
         will have sent to each distributor, dealer or person receiving a
         selling concession, fee or other remuneration that purchases the
         Offered Securities from it during the restricted period a confirmation
         or notice to substantially the following effect:

                      "The Securities covered hereby have not been registered
                      under the U.S. Securities Act of 1933 (the "Securities
                      Act") and may not be offered or sold within the United
                      States or to, or for the account or benefit of, U.S.
                      persons (i) as part of their distribution at any time or
                      (ii) otherwise until 40 days after the later of the date
                      of the commencement of the offering and the closing date,
                      except in either case in accordance with Regulation S (or
                      Rule 144A if available) under the Securities Act. Terms
                      used above have the meanings given to them by Regulation
                      S."

         Terms used in this subsection (b) have the meanings given to them by
Regulation S.

                  (c) Each Purchaser severally agrees that it and each of its
         affiliates have not entered and will not enter into any contractual
         arrangement with respect to the distribution of the Offered Securities
         except for any such arrangements with the other Purchasers or
         affiliates of the other Purchasers with the prior written consent of
         the Company.

                  (d) Each Purchaser severally agrees that it and each of its
         affiliates will not offer or sell the Offered Securities in the United
         States by means of any form of general solicitation or general
         advertising within the meaning of Rule 502(c) under the Securities Act,
         including, but not limited to (i) any advertisement, article, notice or
         other communication published in any newspaper, magazine or similar
         media or broadcast over television or radio; or (ii) any seminar or
         meeting whose attendees have been invited by any general solicitation
         or general advertising. Each Purchaser severally agrees, with respect
         to resales made in reliance on Rule 144A of any of the Offered
         Securities, to deliver either with the confirmation of such resale or
         otherwise prior to settlement of such resale a notice to the effect
         that the resale of such Offered Securities has been made in reliance
         upon the exemption from the registration requirements of the Securities
         Act provided by Rule 144A.

                  (e) Each of the Purchasers severally represents and agrees
         that (i) it has not offered or sold and prior to the expiry of a period
         of six months from the Closing Date, will not offer or sell any Offered
         Securities to persons in the United Kingdom except to persons whose
         ordinary activities involve them in acquiring, holding, managing or
         disposing of investments (as principal or agent) for the purposes of
         their businesses or otherwise in circumstances which have not resulted
         and will not result in an offer to the public in the United Kingdom
         within the meaning of the Public Offers of Securities Regulations 1995;
         (ii) it has only communicated or caused to be communicated and will
         only communicate or cause to be communicated any invitation or
         inducement to engage in investment activity (within the meaning of
         Section 21 of the Financial Services and Markets Act 2000 (the "FSMA"))
         received by it in connection with the issue or sale of any Offered
         Securities in circumstances in which Section 21(1) of the FSMA does not
         apply to the Company or any of the Guarantors; and (iii) it has
         complied and will comply with all applicable provisions of the FSMA
         with respect to anything done by it in relation to the Offered
         Securities in, from or otherwise involving the United Kingdom.

         5. Certain Agreements of the Company and the Guarantors. The Company
and the Guarantors, jointly and severally, agree with the several Purchasers
that:

                  (a) The Company will advise CSFB promptly of any proposal to
         amend or supplement the Offering Document and will not effect such
         amendment or supplementation without CSFB's consent. If, at any time
         prior to the completion of the resale of the Offered Securities by the
         Purchasers, any event occurs as a result of which the Offering Document
         as then amended or supplemented would include an untrue statement of a
         material fact or omit to state any material fact necessary in order to
         make the statements therein, in the light of the circumstances under
         which they were made, not misleading, or if it is necessary at any such
         time to amend



                                       9


         or supplement the Offering Document to comply with any applicable law,
         the Company promptly will notify CSFB of such event and promptly will
         prepare, at its own expense, an amendment or supplement which will
         correct such statement or omission or effect such compliance. Neither
         CSFB's consent to, nor the Purchasers' delivery to offerees or
         investors of, any such amendment or supplement shall constitute a
         waiver of any of the conditions set forth in Section 6.

                  (b) The Company will furnish to CSFB copies of any preliminary
         offering circular, the Offering Document and all amendments and
         supplements to such documents, in each case as soon as available and in
         such quantities as CSFB requests. At any time when the Company is not
         subject to Section 13 or 15(d) of the Exchange Act, the Company will
         promptly furnish or cause to be furnished to CSFB and, upon request, to
         each of the other Purchasers, and, upon request of holders and
         prospective purchasers of the Offered Securities, to such holders and
         purchasers, copies of the information required to be delivered to
         holders and prospective purchasers of the Offered Securities pursuant
         to Rule 144A(d)(4) under the Securities Act (or any successor provision
         thereto) in order to permit compliance with Rule 144A in connection
         with resales by such holders of the Offered Securities. The Company
         will pay the expenses of printing and distributing to the Purchasers
         all such documents.

                  (c) The Company will arrange for the qualification of the
         Offered Securities for sale and the determination of their eligibility
         for investment under the laws of such jurisdictions in the United
         States and Canada as CSFB designates and will continue such
         qualifications in effect so long as required for the resale of the
         Offered Securities by the Purchasers, provided that the Company will
         not be required to qualify as a foreign corporation or to file a
         general consent to service of process in any such state.

                  (d) During the period of two years after the Closing Date, the
         Company will, upon request, furnish to CSFB, each of the other
         Purchasers and any holder of the Offered Securities a copy of the
         restrictions on transfer applicable to the Offered Securities.

                  (e) During the period of two years after the Closing Date, the
         Company will not, and will not permit any of its affiliates (as defined
         in Rule 144 under the Securities Act) to, resell any of the Offered
         Securities that have been reacquired by any of them.

                  (f) During the period of two years after the Closing Date, the
         Company will not be or become, an open-end investment company, unit
         investment trust or face-amount certificate company that is or is
         required to be registered under Section 8 of the Investment Company
         Act.

                  (g) The Company and the Guarantors, jointly and severally,
         will pay all expenses incidental to the performance of its obligations
         under this Agreement, the Indenture and the Registration Rights
         Agreement, including (i) the fees and expenses of the Trustee and its
         professional advisers; (ii) all expenses in connection with the
         execution, issue, authentication, packaging and initial delivery of the
         Offered Securities and, as applicable, the Exchange Securities, the
         preparation and printing of this Agreement, the Registration Rights
         Agreement, the Offered Securities, the Indenture, the Offering Document
         and amendments and supplements thereto, and any other document relating
         to the issuance, offer, sale and delivery of the Offered Securities
         and, as applicable, the Exchange Securities; (iii) the cost of listing
         the Offered Securities and qualifying the Offered Securities for
         trading in The Portal(SM) Market and any expenses incidental thereto;
         (iv) the cost of any advertising approved by the Company in connection
         with the issue of the Offered Securities; (v) any expenses (including
         fees and disbursements of counsel) incurred in connection with
         qualification of the Offered Securities or the Exchange Securities for
         sale under the laws of such jurisdictions in the United States and
         Canada as CSFB designates and the printing of memoranda relating
         thereto; (vi) any fees charged by investment rating agencies for the
         rating of the Offered Securities or the Exchange Securities; and (vii)
         expenses incurred in distributing preliminary offering circulars and
         the Offering Document (including any amendments and supplements
         thereto) to the Purchasers. The Company and the Guarantors on the one
         hand and the Purchasers on the other will each pay half of the travel
         expenses and any other expenses of the Purchasers and the Company
         incurred in connection with attending or hosting meetings with
         prospective purchasers of the Offered Securities.

                  (h) In connection with the offering, until CSFB has notified
         the Company and the other Purchasers of the completion of the resale of
         the Offered Securities, neither the Company nor any of its affiliates
         has or will,



                                       10


         either alone or with one or more other persons, bid for or purchase for
         any account in which it or any of its affiliates has a beneficial
         interest any Offered Securities or attempt to induce any person to
         purchase any Offered Securities; and neither it nor any of its
         affiliates will make bids or purchases for the purpose of creating
         actual, or apparent, active trading in, or of raising the price of, the
         Offered Securities.

                  (i) For a period of 90 days after the date of the initial
         offering of the Offered Securities by the Purchasers, none of the
         Company nor any of the Guarantors will offer, sell, contract to sell,
         pledge or otherwise dispose of, directly or indirectly, or file with
         the Commission a registration statement under the Act (other than the
         Exchange Offer Registration Statement or the Shelf Registration
         Statement (each as defined in the Registration Rights Agreement))
         relating to, any United States dollar-denominated debt securities
         issued or guaranteed by the Company or any Guarantor and having a
         maturity of more than one year from the date of issue; provided that
         this provision shall not prohibit the issuance of the Exchange
         Securities. Neither the Company nor any Guarantor will at any time
         offer, sell, contract to sell, pledge or otherwise dispose of, directly
         or indirectly, any securities under circumstances where such offer,
         sale, pledge, contract or disposition would cause the exemption
         afforded by Section 4(2) of the Securities Act or the safe harbor of
         Regulation S thereunder to cease to be applicable to the offer and sale
         of the Offered Securities.

                  (j) The Company will use its reasonable best efforts to cause
         the Offered Securities to be eligible for The Portal(SM) Market.

                  (k) The Second Amendment to the Second Amended and Restated
         Credit Agreement shall be in full force and effect.

         6. Conditions of the Obligations of the Purchasers. The obligations of
the several Purchasers to purchase and pay for the Offered Securities on the
Closing Date will be subject to the accuracy of the representations and
warranties on the part of the Company and each of the Guarantors herein, to the
accuracy of the statements of officers of the Company and each of the Guarantors
made pursuant to the provisions hereof, to the performance by the Company and
each of the Guarantors of their respective obligations hereunder and to the
following additional conditions precedent:

                  (a) The Purchasers shall have received a letter, dated the
         date of this Agreement, of Ernst & Young LLP confirming that they are
         independent public accountants within the meaning of the Securities Act
         and the applicable published rules and regulations thereunder ("RULES
         AND REGULATIONS") and to the effect that:

                           (i) in their opinion, the financial statements
                  examined by them and included in the Offering Document and in
                  the Exchange Act Reports comply as to form in all material
                  respects with the applicable accounting requirements of the
                  Securities Act and the related published Rules and
                  Regulations;

                           (ii) on the basis of a reading of the latest
                  available interim financial statements of the Company,
                  inquiries of officials of the Company who have responsibility
                  for financial and accounting matters and other specified
                  procedures, nothing came to their attention that caused them
                  to believe that:

                                    (A) at the date of the latest available
                           balance sheet read by such accountants, or at a
                           subsequent specified date not more than three
                           business days prior to the date of this Agreement,
                           there was any change in the capital stock or any
                           increase in short-term indebtedness or long-term debt
                           of the Company and its consolidated subsidiaries or,
                           at the date of the latest available balance sheet
                           read by such accountants, there was any decrease in
                           consolidated net current assets or net assets, as
                           compared with amounts shown on the latest balance
                           sheet included or incorporated by reference in the
                           Offering Document; or

                                    (B) for the period from the closing date of
                           the latest income statement included or incorporated
                           by reference in the Offering Document to the closing
                           date of the latest available income statement read by
                           such accountants there were any decreases, as
                           compared with the corresponding period of the
                           previous year and with the period of corresponding
                           length ended the date of the latest income statement
                           included in the Offering Document, in consolidated
                           net sales, net operating income, consolidated net
                           income or in the ratio of earnings to fixed charges;



                                       11



                           except in all cases set forth in clauses A and B
                           above for changes, increases or decreases which the
                           Offering Document disclose have occurred or may occur
                           or which are described in such letter; and

                                    (iii) they have compared specified dollar
                           amounts (or percentages derived from such dollar
                           amounts) and other financial information contained in
                           the Offering Document and the Exchange Act Reports
                           (in each case to the extent that such dollar amounts,
                           percentages and other financial information are
                           derived from the general accounting records of the
                           Company and the Subsidiaries subject to the internal
                           controls of the Company's accounting system or are
                           derived directly from such records by analysis or
                           computation) with the results obtained from
                           inquiries, a reading of such general accounting
                           records and other procedures specified in such letter
                           and have found such dollar amounts, percentages and
                           other financial information to be in agreement with
                           such results, except as otherwise specified in such
                           letter.

                           (b) Subsequent to the execution and delivery of this
                  Agreement, there shall not have occurred (i) any change, or
                  any development or event involving a prospective change, in
                  the condition (financial or other), business, properties or
                  results of operations of the Company and the Subsidiaries
                  taken as one enterprise which, in the judgment of a majority
                  in interest of the Purchasers, including CSFB, is material and
                  adverse and makes it impractical or inadvisable to proceed
                  with completion of the offering or the sale of and payment for
                  the Offered Securities; (ii) any downgrading in the rating of
                  any debt securities of the Company by any "nationally
                  recognized statistical rating organization" (as defined for
                  purposes of Rule 436(g) under the Securities Act), or any
                  public announcement that any such organization has under
                  surveillance or review its rating of any debt securities of
                  the Company (other than an announcement with positive
                  implications of a possible upgrading, and no implication of a
                  possible downgrading, of such rating) or any announcement that
                  the Company has been placed on negative outlook; (iii) any
                  change in U.S. or international financial, political or
                  economic conditions or currency exchange rates or exchange
                  controls as would, in the judgment of a majority in interest
                  of the Purchasers, including CSFB, be likely to prejudice
                  materially the success of the proposed issue, sale or
                  distribution of the Offered Securities, whether in the primary
                  market or in respect of dealings in the secondary market; (iv)
                  any material suspension or material limitation of trading in
                  securities generally on the New York Stock Exchange or any
                  setting of minimum prices for trading on such exchange, or any
                  suspension of trading of any securities of the Company on any
                  exchange or in the over-the-counter market; (v) any banking
                  moratorium declared by U.S. Federal or New York authorities;
                  (vi) any major disruption of settlements of securities or
                  clearance services in the United States; or (vii) any attack
                  on, outbreak or escalation of hostilities or act of terrorism
                  involving the United States, any declaration of war by
                  Congress or any other national or international calamity or
                  emergency if, in the judgment of a majority in interest of the
                  Purchasers, including CSFB, the effect of any such attack,
                  outbreak, escalation, act, declaration, calamity or emergency
                  makes it impractical or inadvisable to proceed with completion
                  of the offering or sale of and payment for the Offered
                  Securities.

                           (c) The Purchasers shall have received an opinion,
                  dated the Closing Date, of Andrews Kurth LLP, counsel for the
                  Company, that:

                                    (i) The Company is validly existing as a
                           corporation in good standing under the laws of the
                           State of Delaware.

                                    (ii) The Company has the corporate power and
                           authority to own or lease and operate its properties
                           and to conduct its business, in each case as
                           described in the Offering Circular.

                                    (iii) Each of KCS Resources, Inc., Medallion
                           California Properties Company and KCS Energy
                           Services, Inc. is a validly existing corporation in
                           good standing under the laws of the jurisdiction of
                           its incorporation, with the corporate power and
                           authority to own or lease and operate its properties
                           and to conduct its business in each case as described
                           in the Offering Circular; and all of the issued and
                           outstanding capital stock of each such Subsidiary has
                           been duly authorized and validly issued and is owned
                           of record and, to such counsel's knowledge,
                           beneficially by the Company, directly or through
                           subsidiaries.

                                    (iv) Each of this Agreement, the Indenture
                           and the Registration Rights Agreement has been duly
                           authorized, executed and delivered by the Company,
                           KCS Resources, Inc., Medallion California Properties
                           Company and KCS Energy Services, Inc.; and, to the
                           extent such matters are governed by




                                       12


                           the Applicable Laws (as defined in such counsel's
                           opinion) of the State of New York, each of this
                           Agreement, the Indenture and the Registration Rights
                           Agreement has been duly executed and delivered by
                           Proliq, Inc.

                                    (v) The issuance and sale of the Offered
                           Securities has been duly authorized by the Company;
                           the Subsidiary Guarantee to be endorsed on the
                           Offered Securities has been duly authorized, executed
                           and delivered on behalf of each of KCS Resources,
                           Inc., Medallion California Properties Company and KCS
                           Energy Services, Inc.; to the extent such matters are
                           governed by the Applicable Laws of the State of New
                           York, the Subsidiary Guarantee has been duly executed
                           and delivered on behalf of Proliq, Inc.; the Exchange
                           Securities have been duly authorized by the Company;
                           and the Subsidiary Guarantee to be endorsed on the
                           Exchange Securities (the "EXCHANGE NOTES GUARANTEE")
                           has been duly authorized by each of KCS Resources,
                           Inc., Medallion California Properties Company and KCS
                           Energy Services, Inc.

                                    (vi) Under the Applicable Laws of the State
                           of New York, the Indenture constitutes a valid and
                           legally binding obligation of the Company and the
                           Guarantors, enforceable against each of them in
                           accordance with its terms, subject to bankruptcy,
                           insolvency, fraudulent transfer, reorganization,
                           moratorium and similar laws of general applicability
                           relating to or affecting creditors' rights and to
                           general equity principles.

                                    (vii) The Indenture conforms in all material
                           respects to the requirements of the Trust Indenture
                           Act and the rules and regulations of the Commission
                           applicable to an indenture which is qualified
                           thereunder.

                                    (viii) Under the Applicable Laws of the
                           State of New York, the Registration Rights Agreement
                           constitutes a valid and legally binding obligation of
                           the Company and the Guarantors, enforceable against
                           each of them in accordance with its terms, subject to
                           bankruptcy, insolvency, fraudulent transfer,
                           reorganization, moratorium and similar laws of
                           general applicability relating to or affecting
                           creditors' rights and to general equity principles.

                                    (ix) Under the Applicable Laws of the State
                           of New York, when validly issued by the Company and
                           authenticated by the Trustee in the manner provided
                           in the Indenture and delivered to and paid for by the
                           Purchasers in accordance with this Agreement, the
                           Offered Securities will constitute valid and binding
                           obligations of the Company, entitled to the benefits
                           of the Indenture and enforceable against the Company
                           in accordance with their terms, subject to
                           bankruptcy, insolvency, fraudulent transfer,
                           reorganization, moratorium and similar laws of
                           general applicability relating to or affecting
                           creditors' rights and to general equity principles;
                           and, under the Applicable Laws of the State of New
                           York, when the Offered Securities have been validly
                           issued by the Company and authenticated by the
                           Trustee in the manner provided in the Indenture and
                           delivered to and paid for by the Purchasers in
                           accordance with this Agreement and when the
                           Subsidiary Guarantee has been duly executed and
                           delivered by the Guarantors, the Subsidiary Guarantee
                           will constitute a valid and binding obligation of
                           each of the Guarantors, enforceable against each of
                           the Guarantors in accordance with its terms, subject
                           to bankruptcy, insolvency, fraudulent transfer,
                           reorganization, moratorium and similar laws of
                           general applicability relating to or affecting
                           creditors' rights and to general equity principles.

                                    (x) Under the Applicable Laws of the State
                           of New York, when validly issued by the Company and
                           authenticated by the Trustee in the manner provided
                           in the Indenture and delivered in exchange for the
                           Offered Securities pursuant to the exchange offer
                           contemplated by the Registration Rights Agreement,
                           the Exchange Securities will constitute valid and
                           binding obligations of the Company, entitled to the
                           benefits of the Indenture and enforceable against the
                           Company in accordance with their terms, subject to
                           bankruptcy, insolvency, fraudulent transfer,
                           reorganization, moratorium and similar laws of
                           general applicability relating to or affecting
                           creditors' rights and to general equity principles;
                           and, under the Applicable Laws of the State of New
                           York, when the Exchange Securities have been validly
                           issued by the Company and authenticated by the
                           Trustee in the manner provided in the Indenture and
                           delivered in exchange for the Offered Securities
                           pursuant to the exchange offer contemplated by the
                           Registration Rights Agreement and when the Exchange
                           Notes Guarantee has been duly executed and delivered
                           by the Guarantors, the Exchange Notes Guarantee will
                           constitute a valid and binding obligation of each of
                           the



                                       13


                           Guarantors, enforceable against each of the
                           Guarantors in accordance with its terms, subject to
                           bankruptcy, insolvency, fraudulent transfer,
                           reorganization, moratorium and similar laws of
                           general applicability relating to or affecting
                           creditors' rights and to general equity principles.

                                    (xi) To such counsel's knowledge, neither
                           the Company nor KCS Resources, Inc., Medallion
                           California Properties Company or KCS Energy Services,
                           Inc. is in violation of its charter or by-laws.

                                    (xii) None of (i) the execution and delivery
                           on behalf of, or the incurrence or performance by the
                           Company, KCS Resources, Inc., Medallion California
                           Properties Company or KCS Energy Services, Inc. of
                           their respective obligations under, each of the
                           Transaction Agreements (as defined in such counsel's
                           opinion), each in accordance with its terms, (ii) the
                           offering, issuance, sale and delivery of the Offered
                           Securities pursuant to this Agreement, (iii) the
                           issuance of the Offered Notes Guarantee, (iv) the
                           offering, issuance, exchange and delivery of the
                           Exchange Securities pursuant to the exchange offer
                           contemplated by the Registration Rights Agreement in
                           the manner therein contemplated or (v) the issuance
                           of the Exchange Notes Guarantee at such time as the
                           Exchange Securities are issued pursuant to the
                           exchange offer contemplated by the Registration
                           Rights Agreement in the manner therein contemplated
                           (A) constituted, constitutes or will constitute a
                           violation of the organizational documents of the
                           Company, KCS Resources, Inc., Medallion California
                           Properties Company or KCS Energy Services, Inc., (B)
                           constituted, constitutes or will constitute a breach
                           or violation of, or a default (or an event which,
                           with notice or lapse of time or both, would
                           constitute such a default), under any Applicable
                           Agreement (as defined in such counsel's opinion), (C)
                           resulted, results or will result in the creation of
                           any security interest in, or lien upon, any of the
                           property or assets of the Company or any Subsidiary
                           pursuant to any Applicable Agreement, or (D)
                           resulted, results or will result in any violation of
                           (i) the Applicable Laws of the State of Texas, (ii)
                           the Applicable Laws of the State of New York, (iii)
                           the Applicable Laws of the United States of America,
                           (iv) Regulations T, U and X of the Federal Reserve
                           Board, (v) the General Corporation Law of the State
                           of Delaware, or (vi) the Texas Business Corporation
                           Act. Such counsel need not express any opinion,
                           however, as to whether the execution, delivery or
                           performance by the Company or the Guarantors of the
                           Transaction Agreements will constitute a breach or
                           violation of, or a default under or as a result of,
                           any covenant, restriction or provision with respect
                           to any financial ratio or test or any aspect of the
                           financial condition or results of operations of the
                           Company or the Guarantors. Such counsel calls to your
                           attention that certain of the Applicable Agreements
                           are governed by laws other than those as to which
                           such counsel expresses an opinion; such counsel
                           expresses no opinion as to the effect of such other
                           laws on the opinions herein stated.

                                    (xiii) The statements in the Offering
                           Circular under the captions "Description of the
                           Notes" and "Material U.S. Federal Income Tax
                           Considerations," insofar as they constitute
                           descriptions of contracts, agreements or other legal
                           documents, or refer to statements of law or legal
                           conclusions, fairly summarize the matters referred to
                           therein in all material respects, subject to the
                           qualifications and assumptions stated therein.

                                    (xiv) No Governmental Approval (as defined
                           in such counsel's opinion), which has not been
                           obtained or taken and is not in full force and
                           effect, is required to authorize, or is required for,
                           the execution and delivery by the Company or the
                           Subsidiaries of each of the Transaction Agreements,
                           or the incurrence or performance of their respective
                           obligations thereunder, or the enforceability of any
                           of such Transaction Agreements against the Company or
                           the Guarantors on the date hereof, except such as may
                           be required under state securities laws and except
                           for the order of the Commission declaring the
                           Exchange Offer Registration Statement or the Shelf
                           Registration Statement effective and qualification
                           under the Trust Indenture Act of 1939, as amended, in
                           each case as to which and to the extent we express
                           our opinion in clause (xv) below.

                                    (xv) Assuming (i) the accuracy of the
                           representations and warranties of the Company set
                           forth in paragraphs (z), (cc), (dd) and (ff) of
                           Section 2 of this Agreement, (ii) the due performance
                           by the Company and the Purchasers of the covenants
                           and agreements set forth in this Agreement, (iii) the
                           compliance by the Purchasers with the offering and
                           transfer procedures and the restrictions described in
                           the Offering Circular, (iv) the accuracy of the
                           representations and warranties of the Purchasers set
                           forth



                                       14


                           in Section 4 of this Agreement, and (v) the accuracy
                           of the representations and warranties made or deemed
                           to be made in accordance with the section in the
                           Offering Circular captioned "'Transfer Restrictions",
                           (A) the offer, issue, sale and delivery of the
                           Offered Securities, as guaranteed by the Guarantors,
                           to the Purchasers and the initial resale of the
                           Offered Securities, as guaranteed by the Guarantors,
                           by the Purchasers, each in the manner contemplated by
                           this Agreement and the Offering Circular, do not
                           require registration under the Securities Act, and
                           (B) prior to the consummation of the exchange offer
                           or the effectiveness of the Shelf Registration
                           Statement, such offer, issue, sale and delivery of
                           the Offered Securities and such initial resale of the
                           Offered Securities do not require qualification of
                           the Indenture under the Trust Indenture Act of 1939,
                           as amended; provided, however, that we express no
                           opinion as to any subsequent resale of any Initial
                           Note or any Exchange Note.

                                    (xvi) The Company is not and, after giving
                           effect to the offering and sale of the Offered
                           Securities and the application of the proceeds
                           thereof as described in the Offering Document, will
                           not be an "investment company" as such terms are
                           defined in the Investment Company Act.

                           In addition, such counsel shall state they have
                  participated in conferences with officers and other
                  representatives of the Company and the Guarantors and the
                  independent public accountants for the Company and the
                  Guarantors, our representatives and our counsel at which the
                  contents of the Offering Circular and related matters were
                  discussed and, although such counsel has not independently
                  verified and are not passing upon, and do not assume any
                  responsibility for the accuracy, completeness or fairness of
                  the statements contained in the Offering Circular (except and
                  to the extent set forth in clause (xiii) above), on the basis
                  of the foregoing (relying with respect to factual matters to
                  the extent such counsel deem appropriate upon statements by
                  officers and other representatives of the Company and the
                  Guarantors), no facts have come to such counsel's attention
                  that have led such counsel to believe that the Offering
                  Circular, as of its date and as of the date hereof, contained
                  or contains an untrue statement of a material fact or omitted
                  or omits to state any material fact required to be stated
                  therein or necessary to make the statements therein, in light
                  of the circumstances under which they were made, not
                  misleading, it being understood that such counsel shall
                  express no statement or belief with respect to (a) the
                  financial statements and related schedules included therein,
                  including the notes and the auditor's report thereon, or
                  excluded therefrom, and (b) other financial, accounting or oil
                  and gas reserve data, in each case, included in the Offering
                  Circular or excluded therefrom.

                           In rendering its opinion pursuant to this Section
                  6(c), such counsel may rely, as to all matters governed by the
                  laws of jurisdictions other than the law of the State of New
                  York, the federal law of the United States and the General
                  Corporation Law of the State of Delaware, upon the opinions of
                  counsel satisfactory to the Underwriters. Such counsel may
                  also state that, insofar as such opinion involves factual
                  matters, they have relied, to the extent they deem proper,
                  upon certificates of officers of the Company and its
                  Subsidiaries and certificates of public officials.

                           (d) The Purchasers shall have received from Vinson &
                  Elkins L.L.P., counsel for the Purchasers, such opinion or
                  opinions, dated the Closing Date, with respect to the
                  incorporation of the Company, the validity of the Offered
                  Securities, the Offering Circular, the exemption from
                  registration for the offer and sale of the Offered Securities
                  by the Company to the several Purchasers and the resales by
                  the several Purchasers as contemplated hereby and other
                  related matters as CSFB may require, and the Company shall
                  have furnished to such counsel such documents as they request
                  for the purpose of enabling them to pass upon such matters.

                           (e) The Purchasers shall have received a certificate,
                  dated the Closing Date, of the principal executive officer and
                  a principal financial or accounting officer of the Company in
                  which such officers, to the best of their knowledge after
                  reasonable investigation, state that the representations and
                  warranties of the Company and each of the Guarantors in this
                  Agreement are true and correct, that the Company and each of
                  the Guarantors have complied with all agreements and satisfied
                  all conditions on their part to be performed or satisfied
                  hereunder at or prior to the Closing Date, and that,
                  subsequent to the date of the most recent financial statements
                  in the Offering Document there has been no material adverse
                  change, nor any development or event involving a prospective
                  material adverse change, in the condition (financial or
                  other), business, properties or results of operations of the
                  Company and the Subsidiaries taken as a whole except as set
                  forth in the Offering Document or as described in such
                  certificate.



                                       15


                           (f) The Purchasers shall have received a letter,
                  dated the Closing Date, of Ernst & Young LLP that meets the
                  requirements of subsection (a) of this Section 6, except that
                  the specified date referred to in such subsection will be a
                  date not more than three days prior to the Closing Date for
                  the purposes of this subsection.

                           (g) The Purchasers shall have received a letter,
                  dated the Closing Date, of NSAI, in form and substance
                  satisfactory to the Purchasers, with respect to the reserve
                  information included in the Offering Circular.

                           (h) The Company and the Guarantors shall have
                  executed and delivered to the Purchasers the Registration
                  Rights Agreement.

         The Company will furnish the Purchasers with such conformed copies of
such opinions, certificates, letters and documents as the Purchasers reasonably
request. CSFB may in its sole discretion waive on behalf of the Purchasers
compliance with any conditions to the obligations of the Purchasers hereunder.

         7. Indemnification and Contribution.

                  (a) The Company and each of the Guarantors, jointly and
         severally, will indemnify and hold harmless each Purchaser, its
         partners, directors and officers and each person, if any, who controls
         such Purchaser within the meaning of Section 15 of the Securities Act,
         against any losses, claims, damages or liabilities, joint or several,
         to which such Purchaser may become subject, under the Securities Act or
         the Exchange Act or otherwise, insofar as such losses, claims, damages
         or liabilities (or actions in respect thereof) arise out of or are
         based upon any untrue statement or alleged untrue statement of any
         material fact contained in the Offering Document, or any amendment or
         supplement thereto, or any related preliminary offering circular or the
         Exchange Act Reports, or arise out of or are based upon the omission or
         alleged omission to state therein a material fact required to be stated
         therein or necessary in order to make the statements therein, in light
         of the circumstances under which they were made, not misleading,
         including any losses, claims, damages or liabilities arising out of or
         based upon the Company's or such Guarantor's failure to perform its
         obligations under Section 5(a) of this Agreement, and will reimburse
         each Purchaser for any legal or other expenses reasonably incurred by
         such Purchaser in connection with investigating or defending any such
         loss, claim, damage, liability or action as such expenses are incurred;
         provided, however, that the Company and each Guarantor will not be
         liable in any such case to the extent that any such loss, claim, damage
         or liability arises out of or is based upon an untrue statement or
         alleged untrue statement in or omission or alleged omission from any of
         such documents in reliance upon and in conformity with written
         information furnished to the Company by any Purchaser through CSFB
         specifically for use therein, it being understood and agreed that the
         only such information consists of the information described as such in
         subsection (b) below; provided, further, however, that the foregoing
         indemnity agreement with respect to losses, claims, damages or
         liabilities shall not inure to the benefit of any Purchaser (or any
         person controlling any Purchaser) with respect to any losses, claims,
         damages arising out of or based upon (i) any untrue statement or
         alleged untrue statement of any material fact in the preliminary
         offering circular or (ii) the omission or alleged omission to state in
         the preliminary offering circular a material fact necessary in order to
         make the statements therein, in light of the circumstances under which
         they were made, not misleading, if: (A) the Company furnished
         sufficient copies of the offering circular on a timely basis to permit
         delivery of the offering circular to all persons purchasing notes from
         the Purchasers in the initial resale of such notes (such persons
         "INITIAL RESALE PURCHASERS") at or prior to the written confirmation of
         the sale of the Offered Securities to such person; (B) the Initial
         Resale Purchaser asserting such losses, claims, damages or liabilities
         purchased Offered Securities in the initial resale from the Purchasers
         and a copy of the offering circular was not sent or given by or on
         behalf of such Purchaser to such Initial Resale Purchaser; and (C) the
         offering circular would have cured the defect giving rise to such
         losses, claims, damages or liabilities.

                  (b) Each Purchaser will severally and not jointly indemnify
         and hold harmless the Company and each Guarantor, their directors and
         officers and each person, if any, who controls the Company or such
         Guarantor within the meaning of Section 15 of the Securities Act,
         against any losses, claims, damages or liabilities to which the Company
         or such Guarantor may become subject, under the Securities Act or the
         Exchange Act or otherwise, insofar as such losses, claims, damages or
         liabilities (or actions in respect thereof) arise out of or are based
         upon any untrue statement or alleged untrue statement of any material
         fact contained in the Offering Document, or any amendment or supplement
         thereto, or any related preliminary offering circular, or arise out of
         or are based upon the omission or the alleged omission to state therein
         a material fact required to be stated therein or necessary in order to
         make the statements therein, in the light of the circumstances under
         which they



                                       16


         were made, not misleading, in each case to the extent, but only to the
         extent, that such untrue statement or alleged untrue statement or
         omission or alleged omission was made in reliance upon and in
         conformity with written information furnished to the Company by such
         Purchaser through CSFB specifically for use therein, and will reimburse
         any legal or other expenses reasonably incurred by the Company in
         connection with investigating or defending any such loss, claim,
         damage, liability or action as such expenses are incurred, it being
         understood and agreed that the only such information furnished by any
         Purchaser consists of the sixth paragraph and the tenth paragraph under
         the caption "Plan of Distribution"; provided, however, that the
         Purchasers shall not be liable for any losses, claims, damages or
         liabilities arising out of or based upon the Company's or such
         Guarantor's failure to perform its obligations under Section 5(a) of
         this Agreement.

                  (c) Promptly after receipt by an indemnified party under this
         Section 7 of notice of the commencement of any action, such indemnified
         party will, if a claim in respect thereof is to be made against the
         indemnifying party under subsection (a) or (b) above, notify the
         indemnifying party of the commencement thereof, but the failure to
         notify the indemnifying party shall not relieve it from any liability
         that it may have under subsection (a) or (b) above except to the extent
         that it has been materially prejudiced (through the forfeiture of
         substantive rights or defenses) by such failure; and provided further
         that the failure to notify the indemnifying party shall not relieve it
         from any liability that it may have to an indemnified party otherwise
         than under subsection (a) or (b) above. In case any such action is
         brought against any indemnified party and it notifies the indemnifying
         party of the commencement thereof, the indemnifying party will be
         entitled to participate therein and, to the extent that it may wish,
         jointly with any other indemnifying party similarly notified, to assume
         the defense thereof, with counsel satisfactory to such indemnified
         party (who shall not, except with the consent of the indemnified party,
         be counsel to the indemnifying party), and after notice from the
         indemnifying party to such indemnified party of its election so to
         assume the defense thereof, the indemnifying party will not be liable
         to such indemnified party under this Section 7 for any legal or other
         expenses subsequently incurred by such indemnified party in connection
         with the defense thereof other than reasonable costs of investigation.
         No indemnifying party shall, without the prior written consent of the
         indemnified party, effect any settlement of any pending or threatened
         action in respect of which any indemnified party is or could have been
         a party and indemnity could have been sought hereunder by such
         indemnified party unless such settlement includes (i) an unconditional
         release of such indemnified party from all liability on any claims that
         are the subject matter of such action and (ii) does not include a
         statement as to or an admission of fault, culpability or failure to act
         by or on behalf of any indemnified party.

                  (d) If the indemnification provided for in this Section 7 is
         unavailable or insufficient to hold harmless an indemnified party under
         subsection (a) or (b) above, then each indemnifying party shall
         contribute to the amount paid or payable by such indemnified party as a
         result of the losses, claims, damages or liabilities referred to in
         subsection (a) or (b) above (i) in such proportion as is appropriate to
         reflect the relative benefits received by the Company and the
         Guarantors on the one hand and the Purchasers on the other from the
         offering of the Offered Securities or (ii) if the allocation provided
         by clause (i) above is not permitted by applicable law, in such
         proportion as is appropriate to reflect not only the relative benefits
         referred to in clause (i) above but also the relative fault of the
         Company and the Guarantors on the one hand and the Purchasers on the
         other in connection with the statements or omissions which resulted in
         such losses, claims, damages or liabilities as well as any other
         relevant equitable considerations. The relative benefits received by
         the Company and the Guarantors on the one hand and the Purchasers on
         the other shall be deemed to be in the same proportion as the total net
         proceeds from the offering (before deducting expenses) received by the
         Company and the Guarantors bear to the total discounts and commissions
         received by the Purchasers from the Company and the Guarantors under
         this Agreement. The relative fault shall be determined by reference to,
         among other things, whether the untrue or alleged untrue statement of a
         material fact or the omission or alleged omission to state a material
         fact relates to information supplied by the Company and the Guarantors
         or the Purchasers and the parties' relative intent, knowledge, access
         to information and opportunity to correct or prevent such untrue
         statement or omission. The amount paid by an indemnified party as a
         result of the losses, claims, damages or liabilities referred to in the
         first sentence of this subsection (d) shall be deemed to include any
         legal or other expenses reasonably incurred by such indemnified party
         in connection with investigating or defending any action or claim which
         is the subject of this subsection (d). Notwithstanding the provisions
         of this subsection (d), no Purchaser shall be required to contribute
         any amount in excess of the amount by which the total discounts, fees
         and commissions received by such Purchaser exceeds the amount of any
         damages which such Purchaser has otherwise been required to pay by
         reason of such untrue or alleged untrue statement or



                                       17


         omission or alleged omission. The Purchasers' obligations in this
         subsection (d) to contribute are several in proportion to their
         respective purchase obligations and not joint.

                  (e) The obligations of the Company and the Guarantors under
         this Section 7 shall be in addition to any liability which the Company
         and the Guarantors may otherwise have and shall extend, upon the same
         terms and conditions, to each person, if any, who controls any
         Purchaser within the meaning of the Securities Act or the Exchange Act;
         and the obligations of the Purchasers under this Section 7 shall be in
         addition to any liability which the several Purchasers may otherwise
         have and shall extend, upon the same terms and conditions, to each
         person, if any, who controls the Company or any Guarantor within the
         meaning of the Securities Act or the Exchange Act.

         8. Default of Purchasers. If any Purchaser or Purchasers default in
their obligations to purchase the Offered Securities hereunder on the Closing
Date and the aggregate principal amount of the Offered Securities that such
defaulting Purchaser or Purchasers agreed but failed to purchase does not exceed
10% of the total principal amount of the Offered Securities, CSFB may make
arrangements satisfactory to the Company for the purchase of such Offered
Securities by other persons, including any of the Purchasers, but if no such
arrangements are made by the Closing Date, the non-defaulting Purchasers shall
be obligated severally, in proportion to their respective commitments hereunder,
to purchase the Offered Securities that such defaulting Purchasers agreed but
failed to purchase. If any Purchaser or Purchasers so default and the aggregate
principal amount of the Offered Securities with respect to which such default or
defaults occur exceeds 10% of the total principal amount of the Offered
Securities and arrangements satisfactory to CSFB and the Company for the
purchase of such Offered Securities by other persons are not made within 36
hours after such default, this Agreement will terminate without liability on the
part of any non-defaulting Purchaser or the Company or any of the Guarantors,
except as provided in Section 9. As used in this Agreement, the term "PURCHASER"
includes any person substituted for a Purchaser under this Section 8. Nothing
herein will relieve a defaulting Purchaser from liability for its default.

         9. Survival of Certain Representations and Obligations. The respective
indemnities, agreements, representations, warranties and other statements of the
Company and the Guarantors or their respective officers and of the several
Purchasers set forth in or made pursuant to this Agreement will remain in full
force and effect, regardless of any investigation, or statement as to the
results thereof, made by or on behalf of any Purchaser, the Company, the
Guarantors or any of their respective representatives, officers or directors or
any controlling person, and will survive delivery of and payment for the Offered
Securities . If this Agreement is terminated pursuant to Section 8 or if for any
reason the purchase of the Offered Securities by the Purchasers is not
consummated, the Company and each of the Guarantors shall remain responsible for
the expenses to be paid or reimbursed by it pursuant to Section 5 and the
respective obligations of the Company and the Purchasers pursuant to Section 7
shall remain in effect. If the purchase of the Offered Securities by the
Purchasers is not consummated for any reason other than solely because of the
termination of this Agreement pursuant to Section 8 or the occurrence of any
event specified in clause (iii), (iv), (v), (vi) or (vii) of Section 6(b), the
Company will reimburse the Purchasers for all out-of-pocket expenses (including
fees and disbursements of counsel) reasonably incurred by them in connection
with the offering of the Offered Securities.

         10. Notices. All communications hereunder will be in writing and, if
sent to the Purchasers will be mailed, delivered or faxed and confirmed to the
Purchasers c/o Credit Suisse First Boston LLC, Eleven Madison Avenue, New York,
N.Y. 10010-3629, Attention: Transactions Advisory Group (Fax: 212-325-8016), or,
if sent to the Company, will be mailed, delivered or faxed and confirmed to it
at 5555 San Felipe, Suite 1200, Houston, TX 77056, Attention: Secretary (Fax:
713-877-1372); provided, however, that any notice to a Purchaser pursuant to
Section 7 will be mailed, delivered or faxed and confirmed to such Purchaser.

         11. Successors. This Agreement will inure to the benefit of and be
binding upon the parties hereto and their respective successors and the
controlling persons referred to in Section 7, and no other person will have any
right or obligation hereunder, except that holders of the Offered Securities
shall be entitled to enforce the agreements for their benefit contained in the
second and third sentences of Section 5(b) hereof against the Company as if such
holders were parties hereto.

         12. Representation of Purchasers. You will act for the several
Purchasers in connection with this purchase, and any action under this Agreement
taken by you jointly or by CSFB will be binding upon all the Purchasers.



                                       18


         13. Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original, but all such
counterparts shall together constitute one and the same Agreement.

         14. APPLICABLE LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
PRINCIPLES OF CONFLICTS OF LAWS.

         The Company and each Guarantor hereby submit to the non-exclusive
jurisdiction of the Federal and state courts in the Borough of Manhattan in The
City of New York in any suit or proceeding arising out of or relating to this
Agreement or the transactions contemplated hereby.



                                       19






         If the foregoing is in accordance with the Purchasers' understanding of
our agreement, kindly sign and return to the Company one of the counterparts
hereof, whereupon it will become a binding agreement among the Company, the
Guarantors and the several Purchasers in accordance with its terms.

                                      Very truly yours,

                                      KCS ENERGY, INC.


                                      By:
                                          -------------------------------------
                                          Name:
                                          Title:



                                      KCS RESOURCES, INC.


                                      By:
                                          -------------------------------------
                                          Name:
                                          Title:


                                      MEDALLION CALIFORNIA PROPERTIES COMPANY


                                      By:
                                          -------------------------------------
                                          Name:
                                          Title:


                                      KCS ENERGY SERVICES, INC.


                                      By:
                                          -------------------------------------
                                          Name:
                                          Title:


                                      PROLIQ, INC.


                                      By:
                                          -------------------------------------
                                          Name:
                                          Title:



                    Signature Page to the Purchase Agreement




The foregoing Purchase Agreement
is hereby confirmed and accepted
as of the date first above written.


CREDIT SUISSE FIRST BOSTON LLC
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
JEFFERIES & COMPANY, INC.
HARRIS NESBITT CORP.
BANC ONE CAPITAL MARKETS, INC.
BNP PARIBAS SECURITIES CORP.

     Acting on behalf of themselves
     and as the Representatives of
     the several Purchasers

By:  CREDIT SUISSE FIRST BOSTON LLC



     By:
         --------------------------------
         Name:
         Title:



                    Signature Page to the Purchase Agreement







                                   SCHEDULE A



<Table>
<Caption>
                                                                                 PRINCIPAL AMOUNT OF
PURCHASERS                                                                       OFFERED SECURITIES
- ----------                                                                      --------------------
                                                                             
Credit Suisse First Boston LLC.........................................                 $ 78,750,000
Merrill Lynch, Pierce, Fenner & Smith Incorporated.....................                   26,250,000
Jefferies & Company, Inc...............................................                   26,250,000
Harris Nesbitt Corp....................................................                   17,500,000
Banc One Capital Markets, Inc..........................................                   13,125,000
BNP Paribas Securities Corp............................................                   13,125,000
                                                                                       -------------
                          Total........................................                $ 175,000,000
                                                                                       =============

</Table>



                                   Schedule A








                                   SCHEDULE B


KCS Resources Inc., a Delaware corporation
Medallion California Properties Company, a Texas corporation
KCS Energy Services, Inc., a Delaware corporation
Proliq, Inc., a New Jersey corporation


                                   Schedule B