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EXECUTION




GUARANTY

(Subsidiary)




     THIS GUARANTY (this “Guaranty”), dated as of July 11, 2008, is made by QUEST MERGERSUB, INC.,
a Delaware corporation (the “Guarantor”), in favor of ROYAL BANK OF CANADA, as administrative agent
for the “Secured Parties” as defined in the Credit Agreement (hereinafter defined).



WITNESSETH:




     WHEREAS, pursuant to that certain Amended and Restated Credit Agreement dated of even date
herewith (as the same may hereafter be amended, supplemented and restated, the “Credit Agreement”),
among QUEST RESOURCE CORPORATION, a Nevada corporation (the “Borrower”), the various financial
institutions that are, or may from time to time become, parties thereto (individually a “Lender”
and collectively the “Lenders”) and Royal Bank of Canada, as administrative agent and collateral
agent (in its capacity as administrative agent, the “Administrative Agent”), the Lenders have
agreed to make Term Loans for the account of the Borrower; and



     WHEREAS, as a condition precedent to the making of Term Loans under and as defined in the
Credit Agreement, the Guarantor is required to execute and deliver this Guaranty; and



     WHEREAS, the Guarantor has duly authorized the execution, delivery and performance of this
Guaranty; and



     WHEREAS, the Guarantor is a wholly owned subsidiary of the Borrower; and



     WHEREAS, it is in the best interests of the Guarantor to execute this Guaranty inasmuch as the
Guarantor will derive substantial direct and indirect benefits from the extensions of credit made
from time to time to or for the account of the Borrower.



     NOW THEREFORE, for good and valuable consideration, the receipt of which is hereby
acknowledged, and in order to induce the Lenders to make Term Loans to the Borrower pursuant to the
Credit Agreement by fulfilling the requirements of the Credit Agreement, the Guarantor agrees, for
the benefit of each Lender, as follows:



ARTICLE I




DEFINITIONS




     SECTION 1.1 Certain Terms. The following capitalized terms when used in this Guaranty,
including its preamble and recitals, shall have the following meanings (such definitions to be
equally applicable to the singular and plural forms thereof):



     “Administrative Agent” is defined in the first recital.



     “Borrower” is defined in the first recital.



     “Commitments” means each Commitment as defined in the Credit Agreement.



     “Guarantor” is defined in the preamble.



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     “Guaranty” is defined in the preamble.



     “Lenders” is defined in the first recital.



     “Loan Documents” means the Loan Documents as defined in the Credit Agreement.



     “Note” means each Term Note as defined in the Credit Agreement.



     “Obligations” means the Obligations as defined in the Credit Agreement.



     “Obligor” means the Borrower or any other Person (other than the Administrative Agent or any
Lender) obligated under any Loan Document.



     “Required Lenders” means the Required Lenders as defined in the Credit Agreement.



     “Subsidiary Guarantors” means Subsidiaries of Borrower that have guaranteed all or any part of
the Obligations, other than the Guarantor.



     “Taxes” is defined in clause (a) of Section 2. 7.



     “UCC” means the Uniform Commercial Code as in effect in the State of New York.



     SECTION 1.2 Credit Agreement Definitions. Unless otherwise defined herein or the
context otherwise requires, capitalized terms used in this Guaranty, including its preamble and
recitals, have the meanings provided in the Credit Agreement,



     SECTION 1.3 UCC Definitions. Unless otherwise defined herein or the context otherwise
requires, terms for which meanings are provided in the UCC are used in this Guaranty, including its
preamble and recitals, with such meanings.



ARTICLE II




GUARANTY PROVISIONS




     SECTION 2.1 Guaranty. The Guarantor hereby absolutely, unconditionally, and
irrevocably (1) guarantees the full and punctual payment when due, whether at stated maturity, by
required prepayment, declaration, acceleration, demand or otherwise, of all Obligations of the
Borrower and each other Obligor now or hereafter existing under each of the Credit Agreement, the
Notes and each other Loan Document to which the Borrower or such other Obligor is or may become a
party, whether for principal, interest, fees, expenses or otherwise (including all such amounts
which would become due but for the operation of the automatic stay under Section 362(a) of the
United States Bankruptcy Code, 11 U.S.C. §362(a), and the operation of Sections 502(b) and 506(b)
of the United States Bankruptcy Code, 11 U.S.C. §502(b) and §506(b)), and (2) indemnifies and holds
harmless each Lender and each holder of a Note for any and all costs and expenses (including
reasonable attorney’s fees and expenses) incurred by such Lender or such holder, as the case may
be, in enforcing any rights under this Guaranty; provided however, that the Guarantor shall be
liable under this Guaranty for the maximum amount of such liability that can be hereby incurred
without rendering this Guaranty, as it relates to the Guarantor, voidable under applicable law
relating to fraudulent conveyance or fraudulent transfer, and not for any greater amount. This
Guaranty constitutes a guaranty of payment when due and not of collection, and Guarantor
specifically agrees that it shall not be necessary or required that any Lender or any holder
of any Note exercise any right, assert any claim or demand or enforce any remedy whatsoever against
the Borrower or



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any other Obligor (or any other Person) before or as a condition to the obligations
of the Guarantor hereunder.



     SECTION 2.2 Acceleration of Guaranty. Guarantor agrees that, in the event of the
occurrence of any event of the type described in Section 8.01(f) of the Credit Agreement, with
respect to the Borrower, any other Obligor or the Guarantor, and if such event shall occur at a
time when any of the Obligations may not then be due and payable, the Guarantor will pay to the
Lenders forthwith the full amount which would be payable hereunder by the Guarantor if all such
Obligations were then due and payable.



     SECTION 2.3 Guaranty Absolute, etc. This Guaranty shall in all respects be a
continuing, absolute, unconditional and irrevocable guaranty of payment, and shall remain in full
force and effect until all Obligations (other than contingent indemnity obligations) of the
Borrower and each other Obligor have been paid in full (or, in the case of L/C Obligations, Cash
Collateralized), all obligations of the Guarantor hereunder shall have been paid in full, all
Commitments shall have terminated and, except as provided in Section 10.01(e) of the Credit
Agreement, all Lender Hedging Agreements have terminated. The Guarantor may not rescind or revoke
its obligations hereunder. The Guarantor guarantees that the Obligations of the Borrower and each
other Obligor will be paid strictly in accordance with the terms of the Credit Agreement and each
other Loan Document under which they arise, regardless of any law, regulation or order now or
hereafter in effect in any jurisdiction affecting any of such terms or the rights of any Lender or
any holder of any Note with respect thereto. The liability of the Guarantor under this Guaranty
shall be absolute, unconditional and irrevocable irrespective of: (1) any lack of validity,
legality or enforceability of the Credit Agreement, any Note or any other Loan Document; (2) the
failure of any Lender or any holder of any Note (a) to assert any claim or demand or to enforce any
right or remedy against the Borrower, any other Obligor or any other Person (including any other
guarantor) under the provisions of the Credit Agreement, any Note, any other Loan Document or
otherwise, or (b) to exercise any right or remedy against any other guarantor of, or collateral
securing, any Obligations of the Borrower or any other Obligor; (3) any change in the time, manner
or place of payment of, or in any other term of, all or any of the Obligations of the Borrower or
any other Obligor, or any other extension, compromise or renewal of any Obligations of the Borrower
or any other Obligor; (4) any reduction, limitation, impairment or termination of any Obligations
of the Borrower or any other Obligor for any reason, including any claim of waiver, release,
surrender, alteration or compromise, and shall not be subject to (and the Guarantor hereby waives
any right to or claim of) any defense or setoff, counterclaim, recoupment or termination whatsoever
by reason of the invalidity, illegality, nongenuineness, irregularity, compromise, unenforceability
of, or any other event or occurrence affecting, any Obligations of the Borrower, any other Obligor
or otherwise; (5) any amendment to, rescission, waiver, or other modification of, or any consent to
departure from, any of the terms of the Credit Agreement, any Note or any other Loan Document; (6)
any addition, exchange, release, surrender or non-perfection of any collateral, or any amendment to
or waiver or release or addition of, or consent to departure from, any other guaranty, held by any
Lender or any holder of any Note securing any of the Obligations of the Borrower or any other
Obligor; (7) the insolvency or bankruptcy of, or similar event affecting, the Borrower or any other
Obligor; or (8) any other circumstance which might otherwise constitute a defense available to, or
a legal or equitable discharge of, the Borrower, any other Obligor, any surety or any guarantor.
The Guarantor waives all rights and defenses which may arise with respect to any of the foregoing,
and the Guarantor waives any right to revoke this Guaranty with respect to future indebtedness.



     SECTION 2.4 Reinstatement. The Guarantor agrees that this Guaranty shall continue to
be effective or be reinstated, as the case may be, if at any time any payment (in whole or in part)
of any of the Obligations is rescinded or must otherwise be restored by any Lender or any holder of any
Note, upon



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the insolvency, bankruptcy or reorganization of the Borrower, any other Obligor or
otherwise, all as though such payment had not been made.



     SECTION 2.5 Waiver, etc. The Guarantor hereby waives promptness, diligence, notice
of acceptance and any other notice with respect to any of the Obligations of the Borrower or any
other Obligor and this Guaranty and any requirement that the Administrative Agent, any other Lender
or any holder of any Note protect, secure, perfect or insure any security interest or Lien, or any
property subject thereto, or exhaust any right or take any action against the Borrower, any other
Obligor or any other Person (including any other guarantor) or entity or any collateral securing
the Obligations of the Borrower or any other Obligor, as the case may be.



     SECTION 2.6 Waiver of Subrogation. Until the Obligations are paid in full, all
Commitments have terminated and all Lender Hedging Agreements have terminated (except as provided
in Section 10.01(e) of the Credit Agreement), the Guarantor shall not enforce or exercise any claim
or other rights which it may now or hereafter acquire against the Borrower or any other Obligor
that arise from the existence, payment, performance or enforcement of the Guarantor’s obligations
under this Guaranty or any other Loan Document, including any right of subrogation, reimbursement,
exoneration, or indemnification, any right to participate in any claim or remedy of the Lenders
against the Borrower or any other Obligor or any collateral which the Administrative Agent now has
or hereafter acquires, whether or not such claim, remedy or right arises in equity, or under
contract, statute or common law, including the right to take or receive from the Borrower or any
other Obligor, directly or indirectly, in cash or other property or by set-off or in any manner,
payment or security on account of such claim or other rights. If any amount shall be paid to the
Guarantor in violation of the preceding sentence, such amount shall be deemed to have been paid to
the Guarantor for the benefit of, and held in trust for, the Lenders, and shall forthwith be paid
to the Administrative Agent for the benefit of the Lenders by the Guarantor receiving such payment
to be credited and applied upon the Obligations, whether matured or unmatured. The Guarantor
acknowledges that it will receive direct and indirect benefits from the financing arrangements
contemplated by the Credit Agreement and that the waiver set forth in this Section is knowingly
made in contemplation of such benefits.



     SECTION 2.7 Payments Free and Clear of Taxes, etc. The Guarantor hereby agrees that:



     (a) All payments by the Guarantor hereunder shall be made in accordance with Section 3.01 of
the Credit Agreement free and clear of and without deduction for any and all present or future
taxes, duties, levies, imposts, deductions, assessments, fees, withholdings or similar charges, and
all liabilities with respect thereto; excluding, in the case of the Administrative Agent and each
Lender, taxes imposed on or measured by its net income (including any franchise taxes imposed on or
measured by its net income), by the jurisdiction (or any political subdivision thereof) under the
Laws of which the Administrative Agent or such Lender, as the case may be, is organized or
maintains its Lending Office (all such non-excluded taxes, duties, levies, imposts, deductions,
assessments, fees, withholdings or similar charges, and liabilities being hereinafter referred to
as “Taxes”). In the event that any withholding or deduction from any payment to be made by the
Guarantor hereunder is required in respect of any Taxes pursuant to any applicable law, rule or
regulation, then the Guarantor will (i) pay directly to the relevant authority the full amount
required to be so withheld or deducted; (ii) promptly forward to such Lender an official receipt or
other documentation satisfactory to such Lender evidencing such payment to such authority; and
(iii) pay to such Lender such additional amount or amounts as is necessary to ensure that the net
amount actually received by such Lender will equal the full amount such Lender would have received
had no such withholding or deduction been required. Moreover, if any Taxes are directly asserted
against any Lender with respect to any payment received by such Lender hereunder, such Lender may
pay such Taxes and the Guarantor will promptly pay such additional amounts (including, if incurred
as a result of the Guarantor’s or the Borrower’s action, omission or delay, any penalties,
interest or



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expenses) as is necessary in order that the net amount received by such Lender after
the payment of such Taxes (including any Taxes on such additional amount) shall equal the amount
such Lender would have received had such Taxes not been asserted.



     (b) If the Guarantor fails to pay any Taxes when due to the appropriate taxing authority or
fails to remit to any Lender the required receipts or other required documentary evidence, the
Guarantor shall indemnify such Lender for any incremental Taxes, interest or penalties that may
become payable by such Lender as a result of any such failure.



     (c) Without prejudice to the survival of any other agreement of the Guarantor hereunder, the
agreements and obligations of the Guarantor contained in this Section 2.7 shall survive the payment
in full of the principal of and interest on the Term Loan.



     SECTION 2.8 Contribution Agreement. Upon full and final payment of the Obligations,
the Guarantor together with all other Subsidiary Guarantors which have made payments upon all or
any part of the Obligations shall be entitled to contribution from all of the other Subsidiary
Guarantors, to the end that all such payments upon the Obligations shall be shared among Guarantor
and Subsidiary Guarantors who guaranteed such Obligations in proportion to their respective Net
Worths (defined below); provided that the contribution obligations of each of Guarantor and
Subsidiary Guarantors shall be limited to the maximum amount that it can pay at such time without
rendering its contribution obligations voidable under applicable law relating to fraudulent
conveyances or fraudulent transfers. As used in this subsection, the “Net Worth” of each of
Guarantor or Subsidiary Guarantors, as applicable, means at any time, the remainder of (i) the fair
value of Guarantor’s assets (other than such right of contribution), minus (ii) the fair value of
Guarantor’s liabilities (other than its liabilities under its guaranty of the Obligations).



     SECTION 2.9 Subordination. The Guarantor hereby subordinates and makes inferior to the
Obligations any and all indebtedness now or at any time hereafter owed by the Borrower or other
Obligor to the Guarantor. The Guarantor agrees that if any Event of Default has occurred and is
continuing under the Credit Agreement, it will not permit the Borrower to repay such indebtedness
or any part thereof and it will not accept payment from the Borrower of such indebtedness or any
part thereof without the prior written consent of the Required Lenders. If the Guarantor receives
any such payment without the prior required written consent, the amount so paid shall be held in
trust for the benefit of the Lenders, shall be segregated from the other funds of the Guarantor,
and shall forthwith be paid over to the Administrative Agent to be held by the Administrative Agent
as collateral for, or then or at any time thereafter applied in whole or in part by the
Administrative Agent against, all or any portions of the Obligations, whether matured or unmatured,
in such order as the Administrative Agent shall elect.



ARTICLE III




MISCELLANEOUS PROVISIONS




     SECTION 3.1 Loan Document. This Guaranty is a Loan Document executed pursuant to the
Credit Agreement and shall (unless otherwise expressly indicated herein) be construed, administered
and applied in accordance with the terms and provisions thereof.



     SECTION 3.2 Releases. At such time as the Term Loans shall have been paid in full
(other than contingent indemnity obligations) and, subject to Section 10.01(e) of the Credit
Agreement, no Lender Hedging Agreements are outstanding, the Administrative Agent shall, at the
request and expense of the Guarantor following such termination, promptly execute and deliver to
the Guarantor such documents
and instruments as the Guarantor shall reasonably request to evidence termination and release
of this Guaranty.



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     SECTION 3.3 Administrative Agent and Lenders; Successors and Assigns.



     (a) The Administrative Agent is Administrative Agent for each Lender under the Credit
Agreement. All rights granted to Administrative Agent under or in connection with this Guaranty are
for each Lender’s ratable benefit. The Administrative Agent may, without the joinder of any Lender,
exercise any rights in Administrative Agent’s or Lenders’ favor under or in connection with this
Guaranty. The Administrative Agent’s and each Lender’s rights and obligations vis-a-vis each other
may be subject to one or more separate agreements between those parties. However, the Guarantor is
not required to inquire about any such agreement and is not subject to any terms of it unless the
Guarantor specifically enters into such agreement. Therefore, neither the Guarantor nor any of its
successors or assigns are entitled to any benefits or provisions of any such separate agreement nor
are they entitled to rely upon or raise as a defense any party’s failure or refusal to comply with
the provisions of any such agreement.



     (b) This Guaranty benefits the Administrative Agent, the Lenders, and their respective
successors and assigns and binds the Guarantor and its successors and assigns. Upon appointment of
any successor Administrative Agent under the Credit Agreement, all of the rights of Administrative
Agent under this Guaranty automatically vest in that new Administrative Agent as successor
Administrative Agent on behalf of Lenders without any further act, deed, conveyance, or other
formality other than that appointment. The rights of the Administrative Agent and the Lenders under
this Guaranty may be transferred with any assignment of the obligations hereby guaranteed pursuant
to and in accordance with the terms of the Credit Agreement. The Credit Agreement contains
provisions governing assignments of the obligations guaranteed under this Guaranty.



     SECTION 3.4 Amendments, etc. No amendment to or waiver of any provision of this
Guaranty, nor consent to any departure by the Guarantor herefrom, shall in any event be effective
unless the same shall be in writing and signed by or on behalf of the party against whom it is
sought to be enforced and is in conformity with the requirements of Section 10.01 of the Credit
Agreement. Each such waiver or consent shall be effective only in the specific instance and for
the specific purpose for which given.



     SECTION 3.5 Addresses for Notices to the Guarantor. All notices and other
communications hereunder to the Guarantor shall be in writing and mailed or delivered to it,
addressed to it at the address set forth below or at such other address as shall be designated by
the Guarantor in a written notice to the Administrative Agent at the address specified in the
Credit Agreement complying as to delivery with the terms of this Section. All such notices and
other communications shall, when mailed, be effective when deposited in the mail, addressed as
aforesaid. Address for notices:


210 Park Avenue, Suite 2750

Oklahoma City, Oklahoma 73102



Facsimile: (405) 600-7704

Telephone: (405) 600-7722




     SECTION 3.6 No Waiver; Remedies. In addition to, and not in limitation of, Section 2.3
and Section 2.5, no failure on the part of any Lender or any holder of a Note to exercise, and no
delay in exercising, any right hereunder shall operate as a waiver thereof, nor shall any single or
partial exercise of any right hereunder preclude any other or further exercise thereof or the
exercise of any other right. The remedies herein provided are cumulative and not exclusive of any
remedies provided by law.



     SECTION 3.7 Section Captions. Section captions used in this Guaranty are for
convenience of reference only, and shall not affect the construction of this Guaranty.



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     SECTION 3.8 Setoff. In addition to, and not in limitation of, any rights of any
Lender or any holder of a Note under applicable law, upon the occurrence and during the continuance
of an Event of Default under or as defined in the Credit Agreement, each Lender and each such
holder shall be entitled to exercise (for the benefit of all Lenders pursuant to Section 10.09 of
the Credit Agreement) any right of offset or banker’s lien against each and every account and other
property or interest that the Guarantor may now or hereafter have with, or which is now or
hereafter in the possession of, any such Lender, to the extent of the full amount of the
Obligations.



     SECTION 3.9 Severability. Wherever possible, each provision of this Guaranty shall be
interpreted in such manner as to be effective and valid under applicable law, but if any provision
of this Guaranty shall be prohibited by or invalid under such law, such provision shall be
ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of
such provision or the remaining provisions of this Guaranty.



     SECTION 3.10 Governing Law.



     (a) THIS GUARANTY SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE
OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE;
PROVIDED THAT THE ADMINISTRATIVE AGENT AND EACH LENDER SHALL RETAIN ALL RIGHTS ARISING
UNDER UNITED STATES FEDERAL LAW.



     (b) THE GUARANTOR AGREES ANY LEGAL ACTION OR PROCEEDING WITH RESPECT TO THIS GUARANTY OR ANY
OTHER LOAN DOCUMENT MAY BE BROUGHT IN THE COURTS OF THE STATE OF NEW YORK SITTING IN THE BOROUGH OF
NEW YORK OR OF THE UNITED STATES FOR THE SOUTHERN DISTRICT OF NEW YORK AND APPELLATE COURTS FROM
ANY THEREOF, AND BY EXECUTION AND DELIVERY OF THIS GUARANTY, THE GUARANTOR CONSENTS, FOR ITSELF AND
IN RESPECT OF ITS PROPERTY, TO THE NON-EXCLUSIVE JURISDICTION OF THOSE COURTS. THE GUARANTOR (1)
IRREVOCABLY WAIVES ANY OBJECTION, INCLUDING ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE
GROUNDS OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR HEREAFTER HAVE TO THE BRINGING OF ANY ACTION
OR PROCEEDING IN SUCH JURISDICTION IN RESPECT OF ANY LOAN DOCUMENT OR OTHER DOCUMENT RELATED
THERETO, AND (2) IRREVOCABLY CONSENTS TO THE SERVICE OF PROCESS OUT OF ANY OF THE AFOREMENTIONED
COURTS IN ANY SUCH ACTION OR PROCEEDING BY THE MAILING OF COPIES THEREOF BY CERTIFIED MAIL, RETURN
RECEIPT REQUESTED, POSTAGE PREPAID, AT ITS ADDRESS FOR NOTICES DESIGNATED HEREIN. THE GUARANTOR
WAIVES PERSONAL SERVICE OF ANY SUMMONS, COMPLAINT OR OTHER PROCESS, WHICH MAY BE MADE BY ANY OTHER
MEANS PERMITTED BY THE LAW OF SUCH STATE.



     SECTION 3.11 Waiver of Jury Trial, Etc. THE GUARANTOR HEREBY (a) EXPRESSLY AND
IRREVOCABLY WAIVES ANY RIGHT TO TRIAL BY JURY OF ANY CLAIM, DEMAND, ACTION OR CAUSE OF ACTION
ARISING UNDER ANY LOAN DOCUMENT OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE
DEALINGS OF THE PARTIES TO THE LOAN DOCUMENTS OR ANY OF THEM WITH RESPECT TO ANY LOAN DOCUMENT, OR
THE TRANSACTIONS RELATED THERETO, IN EACH CASE WHETHER NOW EXISTING OR
HEREAFTER ARISING, AND WHETHER FOUNDED IN CONTRACT OR TORT OR OTHERWISE; AND THE GUARANTOR
HEREBY AGREES AND CONSENTS THAT ANY SUCH CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED
BY COURT TRIAL WITHOUT



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A JURY, AND THAT ADMINISTRATIVE AGENT OR ANY LENDER MAY FILE AN ORIGINAL
COUNTERPART OR A COPY OF THIS SECTION WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT OF THE
GUARANTOR TO THE WAIVER OF ITS RIGHT TO TRIAL BY JURY; AND (b) EXPRESSLY AND IRREVOCABLY WAIVES, TO
THE MAXIMUM EXTENT NOT PROHIBITED BY LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY SUCH
ACTION ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR DAMAGES OTHER THAN, OR IN
ADDITION TO, ACTUAL DAMAGES; PROVIDED THAT THE WAIVER CONTAINED IN THIS SECTION 3.11 SHALL NOT
APPLY TO THE EXTENT THAT THE PARTY AGAINST WHOM DAMAGES ARE SOUGHT HAS ENGAGED IN GROSS NEGLIGENCE
OR WILLFUL MISCONDUCT.



     SECTION 3.12 Entire Agreement. THIS GUARANTY AND THE OTHER LOAN DOCUMENTS REPRESENT
THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES.



Remainder of page Intentionally Blank.

Signature Page to Follow.



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     IN WITNESS WHEREOF, the Guarantor has caused this Guaranty to be duly executed and delivered
by an officer duly authorized as of the date first above written.



	 	 	 	 	 
	 	QUEST MERGERSUB, INC.,

a Delaware corporation, as Guarantor

 	 
	 	By:  	/s/ Jerry D. Cash	 
	 	 	Jerry D. Cash, Chief Executive Officer and President 	 
	 	 	 	 
	 



SUBSIDIARY GUARANTY — MERGERSUB



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