Document:

THE PAYMENT OF THE PRINCIPAL AMOUNT OF
THE INDEBTEDNESS EVIDENCED BY THIS INSTRUMENT AND THE INTEREST ACCRUING THEREON IS SUBORDINATED TO OTHER INDEBTEDNESS PURSUANT
TO, AND TO THE EXTENT PROVIDED IN, AND IS OTHERWISE SUBJECT TO THE TERMS OF, THE SUBORDINATION AGREEMENT DATED AS OF MARCH 5, 2012
BY AND AMONG GERONIMO HOLDINGS CORPORATION, A DELAWARE CORPORATION, AMERICAN STANDARD ENERGY, CORP., A DELAWARE CORPORATION, AND
PENTWATER EQUITY OPPORTUNITIES MASTER FUND LTD., A CAYMAN ISLANDS CORPORATION, AND PWCM MASTER FUND LTD., A CAYMAN ISLANDS CORPORATION.

 

PROMISSORY
NOTE

 

	$35,000,000	March 5, 2012

 

For value received, intending
to be legally bound, the undersigned (the “Maker”) promises to pay to Geronimo Holdings Corporation, a Texas corporation
(the “Payee”) in Midland County, Texas the principal amount of Thirty-Five Million Dollars ($35,000,000) (the “Principal
Amount”) on the terms and conditions contained in this Promissory Note (this “Note”).

 

1.This Note
evidences the obligation of the Maker to pay amounts in respect of the Purchase Price (under and as defined in that certain Purchase
and Sale Agreement, dated of even date herewith, between the Maker and the Payee.

 

2.The Maker
agrees to pay interest on the unpaid Principal Amount of this Note at the fixed rate of seven percent (7%) per annum; provided,
that if an Event of Default (as hereinafter defined) shall have occurred and be continuing, interest shall accrue on the unpaid
Principal Amount of this Note until such Event of Default is remedied at a rate of nine percent (9%) per annum. Interest shall
be computed on the basis of a 365-day year or 366-day year, as the case may be, for the actual number of days elapsed. The Maker
shall pay to the Payee on each Payment Date (as hereinafter defined), unless earlier accelerated by the Payee following the occurrence
of an Event of Default, accrued and unpaid interest, if any, on the unpaid Principal Amount of this Note from and including the
immediately preceding Payment Date (or in the case of the first Payment Date, the date hereof) to and including the day immediately
preceding such Payment Date. “Payment Date” shall mean the first (1st) day of each month (or on the next
succeeding Business Day if such day is not a Business Day), beginning on June 1, 2012 and continuing on the 1st day
of each month until and including March 21, 2016. “Business Day” shall mean any day other than a day on which commercial
banks are authorized or required to close in Scottsdale, Arizona.

 

3.The Maker
shall pay to the Payee the Principal Amount of this Note, together with all accrued and unpaid interest thereon, on March 21, 2016
(the “Maturity Date”), unless earlier accelerated by the Payee following the occurrence of an Event of Default.

 

4.The Maker
shall have the right to prepay all or a portion of the unpaid Principal Amount of this Note, without premium or penalty, at any
time. All prepayments made by the Maker shall be applied, first, to the payment of accrued and unpaid interest, if any, on the
unpaid Principal Amount of this Note and, second, to the unpaid installments of the Principal Amount of this Note in inverse order
of maturity.

 

    	 

    	 

    
 

5.The occurrence
of any one or more of the following events shall be an event of default (each such event, an “Event of Default”):

 

(a)the
Maker fails to pay (i) any interest payment required to be paid on any applicable Payment Date or (ii) the Principal Amount of
this Note, together with all accrued and unpaid interest thereon on the Maturity Date, and in either case, such failure continues
uncured for thirty (30) Business Days following notice from the Payee to the Maker of such failure;

 

(b)the
Maker fails to observe or perform any other term, covenant or condition of this Note and such failure continues uncured for thirty
(30) Business Days following notice from the Payee to the Maker of such failure;

 

(c)the
Maker (i) executes an assignment for the benefit of its creditors, (ii) becomes or is adjudicated bankrupt or insolvent, (iii)
admits in writing its inability to pay its debts generally as they become due, (iv) applies for or consents to the appointment
of a conservator, receiver, trustee, or liquidator of the Maker or of all or any substantial part of its assets, (v) files a voluntary
petition seeking reorganization or an arrangement with creditors or to seek any other relief under Title 11 of the United States
Code as amended from time to time, and any successor statute and all rules and regulations promulgated thereunder and all other
applicable liquidation, conservatorship, bankruptcy, insolvency, rearrangement, moratorium, reorganization, fraudulent transfer
or conveyance or similar debtor relief laws affecting the rights of creditors generally from time to time in effect (the “Debtor
Relief Laws”), (vi) files an answer admitting the material allegations of or consenting to, or defaults in, a petition filed
against it in any proceeding under any Debtor Relief Laws, or (vii) institutes or voluntarily becomes a party to any other judicial
proceedings intended to effect a discharge of its debts, in whole or in part, or seeking to postpone the maturity or the collection
of any of its debts or to suspend any of the rights of Administrative Agent or any of its Affiliates under any of the Loan Documents;

 

(d)any
person files a petition seeking reorganization of the Maker or appointing a conservator, receiver, trustee or liquidator of the
Maker or of a substantial part of its assets and the petition is not discharged within 90 days after its filing;

 

(e)a
court of competent jurisdiction enters an order, judgment or decree approving the reorganization of the Maker or appointing a conservator,
receiver, trustee or liquidator of the Maker, or of a substantial part of its assets, and the order, judgment or decree is not
permanently stayed or reversed within 60 days after its entry;

 

(f)a
judgment for more than $5,000,000 (or for any amount if the execution and enforcement of that judgment could reasonably
be expected to have a materially adverse effect on: the ability of the Maker to pay its obligations under this Note (a “Material
Adverse Effect”) is entered against the Maker and not appealed and bonded or fully stayed, vacated, paid or discharged within
30 days of its entry unless the judgment relates to a claim (i) that is fully covered by insurance and for which the insurance
company has unconditionally accepted liability or (ii) for which the Maker maintains adequate reserves in accordance with generally
accepted accounting principles recognized as such by the Financial Accounting Standards Board consistently applied (“GAAP”);
or

 

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(g)the
Maker fails to pay any indebtedness for borrowed money (other than the obligations under this Note) in excess of $5,000,000
when due (whether at scheduled maturity or by acceleration, demand or otherwise) and the failure to pay continues past the
expiration of any applicable cure period unless (i) the Maker has previously documented to the reasonable satisfaction of the Payee
the basis upon which the Maker intends to dispute such indebtedness and (ii) the Maker maintains adequate reserves therefor in
accordance with GAAP.

 

Upon the occurrence of
any Event of Default and at the option of the Payee, the Payee may (i) declare the indebtedness evidenced by this Note, together
with all accrued and unpaid interest thereon, if any, to be immediately due and payable, without presentment, demand, protest or
other notice of any kind, all of which are hereby expressly waived; provided, that, upon
the occurrence of an Event of Default set forth in paragraphs 5(c) or (d) above, the indebtedness evidenced by this Note,
together with accrued and unpaid interest thereon, if any, shall become automatically due
and payable without notice or demand, and (ii) exercise any and all rights and remedies available to it under this Note
and under applicable law. Upon the occurrence of any Event of Default, the reasonable
attorneys’ and other professionals’ fees and expenses incurred by the Payee in connection with the enforcement of its
rights under this Note shall be chargeable to the Maker.

 

6.The Principal
Amount of this Note is subject to reduction pursuant to Section 7 and Section 13(e)(iv) of that certain Purchase and Sale Agreement
dated as of February __, 2012 among the Payee and XOG Operating LLC, a Texas limited liability company, as sellers, and the Maker,
as buyer, as the same may be amended, restated, supplemented or otherwise modified from time to time.

 

7.If any
term or other provision of this Note is invalid, illegal or incapable of being enforced by any rule of law, or by public policy,
all other conditions and provisions of this Note shall nevertheless remain in full force and effect so long as the economic or
legal substance of the transactions contemplated hereby is not affected in any manner adverse to any party. Upon such determination
that any term or other provision is invalid, illegal or incapable of being enforced, the Maker and the Payee shall negotiate in
good faith to modify this Note so as to effect the original intent of the Maker and the Payee as closely as possible in an acceptable
manner to the end that transactions contemplated hereby are fulfilled to the greatest extent possible.

 

8.This Note
and the agreements referred to herein, constitute the entire agreement, and supersede all prior agreements and undertakings, both
written and oral, among the parties, or any of them, with respect to the subject matter hereof and thereof.

 

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9.This Note
shall inure to the benefit of the Payee and the Payee’s successors and assigns.

 

10.WITHOUT
REGARD TO PRINCIPLES OF CONFLICTS OF LAW, THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS
OF THE STATE OF TEXAS SHALL APPLY AS TO THE PROPERTY LOCATED IN (OR OTHERWISE SUBJECT TO THE LAWS OF) SUCH STATE. THE MAKER AGREES
THAT VENUE SHALL BE IN ANY STATE COURT OR THE UNITED STATES DISTRICT COURT LOCATED IN MIDLAND, TEXAS. THE MAKER CONSENTS TO THE
EXCLUSIVE JURISDICTION OF SUCH COURTS (AND THE APPELLATE COURTS THEREOF) AND AGREES NOT TO COMMENCE ANY SUCH PROCEEDING EXCEPT
IN SUCH COURTS. THE MAKER AGREES NOT TO ASSERT (BY WAY OF MOTION, AS A DEFENSE, OR OTHERWISE), AND HEREBY IRREVOCABLY AND UNCONDITIONALLY
WAIVES IN ANY SUCH PROCEEDING COMMENCED IN SUCH COURT, ANY OBJECTION OR CLAIM THAT THE MAKER IS NOT SUBJECT PERSONALLY TO THE JURISDICTION
OF SUCH COURT OR THAT SUCH PROCEEDING HAS BEEN BROUGHT IN AN INCONVENIENT FORUM. IF SUCH COURTS REFUSE TO EXERCISE JURISDICTION
HEREUNDER, THE MAKER AGREES THAT SUCH JURISDICTION SHALL BE PROPER IN ANY COURT IN WHICH JURISDICTION MAY BE OBTAINED.

 

11.THE MAKER
HEREBY EXPRESSLY WAIVES ANY RIGHT TO TRIAL BY JURY OF ANY CLAIM, DEMAND, ACTION OR CAUSE OF ACTION (1) ARISING UNDER THIS NOTE
OR ANY OTHER INSTRUMENT, DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH, OR (2) IN ANY WAY CONNECTED WITH OR
RELATED OR INCIDENTAL TO THE DEALINGS OF THE MAKER AND THE PAYEE OR ANY OF THEM WITH RESPECT TO THIS NOTE OR ANY OTHER INSTRUMENT,
DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH, OR THE TRANSACTIONS RELATED HERETO OR THERETO, IN EACH CASE
WHETHER NOW EXISTING OR HEREAFTER ARISING AND WHETHER SOUNDING IN CONTRACT OR TORT OR OTHERWISE; AND THE MAKER HEREBY AGREES AND
CONSENTS THAT ANY SUCH CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED BY COURT TRIAL WITHOUT A JURY, AND THAT ANY PARTY
TO THIS AGREEMENT MAY FILE AN ORIGINAL COUNTERPART OR A COPY OF THIS SECTION 11 WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT
OF THE MAKER TO THE WAIVER OF ITS RIGHT TO TRIAL BY JURY.

 

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IN
WITNESS WHEREOF, the Maker has signed and delivered this Note as of the day and year first above written.

 

 

	 	AMERICAN STANDARD
ENERGY CORPORATION,

a Delaware
corporation

	 	 
	 	By: 	/s/ Richard MacQueen
	 	 	Name: Richard MacQueen
Title: President

 

Signature Page to ASEN Promissory Note
($35,000,000)March 5, 2012	 

  

	
        Pentwater Equity Opportunities Master Fund
        Ltd. PWCM Master Fund Ltd.

        227 West Monroe Street

        Chicago, Illinois 60606
	 

 

		Re:	Letter Agreement regarding SECURED CONVERTIBLE PROMISSORY
NOTE

 

Ladies and Gentlemen:

 

Reference is made to
that certain Secured Convertible Promissory Note dated as of February 9, 2012 (the “Note”), among Asen
2, Corp., a Delaware corporation (“Company”), Pentwater Equity Opportunities Master Fund Ltd., a Cayman Islands
corporation (“Opportunities”), and PWCM Master Fund Ltd., a Cayman Islands corporation (“PWCM”,
and together with Opportunities, collectively “Investors”). All terms defined in the Note and not otherwise
defined herein shall have the meanings given to them in the Note.

 

Company and Investors
hereby agree that, effective as of the date hereof, clause (i) of the second sentence of the second paragraph of the Note is hereby
amended to delete the reference to “February 9, 2015” and add “December 1, 2013” in its place.

 

 

[Remainder
of Page Intentionally Blank; Signatures Follow]

 

    	 

    	 	

    
 

	 	Sincerely,
	 	 	 	 
	 	 	 	 
	 	ASEN 2, CORP.,
	 	a Delaware corporation
	 	 
	 	By: 	/s/ Richard MacQueen	 
	 	 	Richard MacQueen, President

 

 

    	 

    	 	

    
 

Acknowledged,
Agreed, and Accepted:

 

Pentwater Equity
Opportunities Master Fund Ltd., 

a Cayman Islands corporation

 

By: /s/ David M. Zirin                                  

Title: David M. Zirin, Director

 

 

 

PWCM Master Fund
Ltd., 

a Cayman Islands corporation

 

By: /s/ David M. Zirin                                  

Title: David M. Zirin, Director

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