Document:

EX-10.1

 Exhibit 10.1 
 FORM OF 
 AMENDMENT 

TO 

CHANGE IN CONTROL AGREEMENT 
 THIS AMENDMENT TO CHANGE IN CONTROL AGREEMENT (this “Amendment”), dated as of December 31, 2012, is made by and between ARMSTRONG WORLD INDUSTRIES, INC., a Pennsylvania corporation
(the “Company”), and             (the “Executive”). 
 Capitalized terms used herein without definition shall have the meanings ascribed thereto in the Change in Control Agreement (defined below). 

BACKGROUND RECITALS 
 A. The Company and the Executive are party to that certain Change in Control Agreement dated as of             , (the “Change in Control
Agreement”); 
 B. The Company and the Executive desire to amend the Change in Control Agreement to provide for an
annual renewal date of August 1; 
 NOW, THEREFORE, in consideration of the premises set forth above, and for other good
and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows: 
  

	 	1.	Amendment. In accordance with the provisions set forth in Section 12 of the Change in Control Agreement regarding the modification of any provision of such
agreement, Section 2 of the Change in Control Agreement is hereby amended and restated in its entirety to read as follows: 

 “2. Term of Agreement. This Agreement shall commence on the Effective Date and shall continue in effect until the immediately following August 1, at which time, and on each one
(1) year anniversary thereafter (“Anniversary Date”), this Agreement shall automatically be renewed for one (1) additional year commencing on the Anniversary Date, unless one party provides written notice to the other
party, at least ninety (90) days in advance of an Anniversary Date, of its intent not to renew this Agreement for an additional one year term. Notwithstanding the foregoing, if a Change in Control shall have occurred after the Effective Date
and during the term of this Agreement, this Agreement shall continue in effect for a period of not less than twenty-four (24) months beyond the month in which a Change in Control occurred.” 

Except to the extent modified by this Amendment, the Change in Control Agreement shall remain unchanged and in full force and effect.

  

	 	2.	Execution in Counterparts. This Amendment may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which
when so executed and delivered shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or other
electronic means shall be effective as delivery of a manually executed counterpart of this Amendment. 

	 	3.	Governing Law. The validity, interpretation, construction and performance of this Amendment shall be governed by the laws of the Commonwealth of Pennsylvania.

 [Remainder of Page Intentionally Left Blank] 

  
 2 

 IN WITNESS WHEREOF, the Company and the Executive have executed this Amendment as of the
date first written above. 
  

			
	ARMSTRONG WORLD INDUSTRIES, INC.
		
	By:	 	  

	 	 	 Name:

Title:

	
	EXECUTIVE
	
	  

  
 3EX-10.2

 Exhibit 10.2 
 Schedule of Officers – Form of Change in Control Agreement, as Amended 
 Set forth
below is a list of Officers who have entered into (i) the form of Change in Control Agreement with Armstrong World Industries, Inc. filed as Exhibit 10.1 to the Current Report on Form 8-K filed on July 6, 2010 and (ii) the form of
Amendment to Change in Control Agreement with Armstrong World Industries, Inc. effective December 31, 2012 filed as Exhibit 10.2 to the Current Report on Form 10-K on January 4, 2013: 

Victor D. Grizzle 
 Mark A. Hershey 

Thomas M. Kane 
 Donald R. Maier 

Thomas B. Mangas 
 Stephen F. McNamara

 Stephen H. Poole 
 Frank J. ReadyEX-10.3

 Exhibit 10.3 
 AMENDMENT 
 TO 

CHANGE IN CONTROL AGREEMENT 
 THIS AMENDMENT TO CHANGE IN CONTROL AGREEMENT (this “Amendment”), dated as of December 31, 2012, is made by and between ARMSTRONG WORLD INDUSTRIES, INC., a Pennsylvania corporation
(the “Company”), and Matthew Espe (the “Executive”). 
 Capitalized terms used herein without
definition shall have the meanings ascribed thereto in the Change in Control Agreement (defined below). 
 BACKGROUND
RECITALS 
 A. The Company and the Executive are party to that certain Change in Control Agreement dated as of
June 24, 2010, (the “Change in Control Agreement”); 
 B. The Company and the Executive desire to amend
the Change in Control Agreement to provide for an annual renewal date of August 1; 
 NOW, THEREFORE, in consideration of
the premises set forth above, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows: 

 

	 	1.	Amendment. In accordance with the provisions set forth in Section 12 of the Change in Control Agreement regarding the modification of any provision of such
agreement, Section 2 of the Change in Control Agreement is hereby amended and restated in its entirety to read as follows: 

 “2. Term of Agreement. This Agreement shall commence on the Effective Date and shall continue in effect until the immediately following August 1, at which time, and on each one
(1) year anniversary thereafter (“Anniversary Date”), this Agreement shall automatically be renewed for one (1) additional year commencing on the Anniversary Date, unless one party provides written notice to the other
party, at least ninety (90) days in advance of an Anniversary Date, of its intent not to renew this Agreement for an additional one year term. Notwithstanding the foregoing, if a Change in Control shall have occurred after the Effective Date
and during the term of this Agreement, this Agreement shall continue in effect for a period of not less than twenty-four (24) months beyond the month in which a Change in Control occurred.” 

Except to the extent modified by this Amendment, the Change in Control Agreement shall remain unchanged and in full force and effect.

  

	 	2.	Execution in Counterparts. This Amendment may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which
when so executed and delivered shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or other
electronic means shall be effective as delivery of a manually executed counterpart of this Amendment. 

	 	3.	Governing Law. The validity, interpretation, construction and performance of this Amendment shall be governed by the laws of the Commonwealth of Pennsylvania.

 [Remainder of Page Intentionally Left Blank] 

  
 2 

 IN WITNESS WHEREOF, the Company and the Executive have executed this Amendment as of the
date first written above. 
  

					
	ARMSTRONG WORLD INDUSTRIES, INC.
		
	By:	 	 /s/ Mark A. Hershey

		 	Name:	 	Mark A. Hershey
		 	Title:	 	Senior Vice President, General Counsel and Secretary
	
	MATTHEW ESPE
	
	 /s/ Matthew Espe

  
 3EX-10.4

 Exhibit 10.4 
 [Armstrong World Industries, Inc. Letterhead] 
 December 31, 2012 

Mr. Matthew Espe 
 Chief Executive
Officer & President 
 Armstrong World Industries, Inc. 
 2500 Columbia Avenue 
 Lancaster PA 17603 
 Re: Employment Agreement – Section 409A  
 Dear Matt: 

You and Armstrong World Industries, Inc. (the “Company”) are parties to an Employment Agreement dated as of June 24, 2010 (the
“Agreement”), which sets forth the terms of your employment with the Company. 
 In order to comply with section 409A of the Internal
Revenue Code, you and the Company agree that the Agreement is amended as follows: 
 Section 9 is amended by adding a sentence to the end
to read as follows: 
 Notwithstanding any provision of this Agreement to the contrary, (i) in no event may Executive,
directly or indirectly, designate the calendar year of a payment, and (ii) if and to the extent that payments under Section 8(d)(iii) or (v) are subject to Section 409A of the Code, such payments will be made or commence, as
applicable, on the sixtieth (60th) day following Executive’s date of termination of employment, subject to Executive executing and not revoking a release of claims as described above. 

In all respects not amended, the Agreement is ratified and confirmed. 
 Please confirm your agreement to this amendment by signing the enclosed copy of this letter and returning it to Thomas M. Kane, Sr. Vice President, Human Resources & Government Relations.

 Very truly yours, 
  

			
	 Armstrong World Industries, Inc.

		
	 By:
	 	 /s/ Mark A. Hershey

 As its Senior Vice President, General Counsel and Secretary 

 

	
	CONFIRMED AND AGREED
	as of the date first set forth above:
	
	 /s/ Matthew Espe

	Matthew EspeAmendment No. 6 to Loan and Security Agreement

 Exhibit 10.1 
 AMENDMENT NO. 6 TO LOAN AND SECURITY AGREEMENT 
 AMENDMENT NO. 6 TO LOAN
AND SECURITY AGREEMENT, dated as of December 31, 2012 (this “Amendment No. 6”), by and among Wells Fargo Bank, National Association, successor by merger to Wachovia Bank, National Association, a national banking association, in
its capacity as agent for the Lenders (as hereinafter defined) pursuant to the Loan Agreement as defined below (in such capacity, “Agent”), the parties to the Loan Agreement as lenders (individually, each a “Lender” and
collectively, “Lenders”), U.S. Silica Company, a Delaware corporation (the “Company”), the subsidiaries of the Company from time to time party to the Loan Agreement as borrowers (each individually, together with the Company, a
“Borrower” and collectively, “Borrowers”), USS Holdings, Inc., a Delaware corporation (“Parent”) and certain subsidiaries of Parent from time to time party to the Loan Agreement as Guarantors (individually, each a
“Guarantor” and collectively, “Guarantors”). 
 W I T N E S S E T H : 

WHEREAS, Agent, Lenders, Borrowers and Guarantors have entered into financing arrangements pursuant to which Lenders (or Agent on behalf
of Lenders) have made and may make loans and advances and provide other financial accommodations to Borrowers as set forth in the ABL Loan and Security Agreement, dated as of August 9, 2007, as amended by Amendment No. 1 and Consent to
Loan and Security Agreement, dated as of November 25, 2008, by and among Agent, Lenders, Borrowers and Guarantors, Amendment No. 2 to Loan and Security Agreement and Consent, dated as of May 7, 2010, by and among Agent, Lenders,
Borrowers and Guarantors, Amendment No. 3 to Loan and Security Agreement and Consent, dated as of June 8, 2011, by and among Agent, Lenders, Borrowers and Guarantors, Amendment No. 4 to Loan and Security Agreement, dated as of
January 22, 2012, by and among Agent, Lenders, Borrowers and Guarantors and Amendment No. 5 to Loan and Security Agreement, dated as of March 30, 2012, by and among Agent, Lenders, Borrowers and Guarantors (as from time to time
amended, modified, supplemented, extended, renewed, restated or replaced, the “Loan Agreement”, and together with all agreements, documents and instruments at any time executed and/or delivered in connection therewith or related thereto,
as from time to time amended, modified, supplemented, extended, renewed, restated, or replaced, collectively, the “Financing Agreements”); 
 WHEREAS, Borrowers and Guarantors wish to amend certain provisions of the Loan Agreement as set forth herein, and Agent and Lenders are willing to agree to such amendments on the terms and subject to the
conditions set forth herein; and 
 WHEREAS, by this Amendment No. 6, Agent, Lenders, Borrowers and Guarantors intend to
evidence such amendments. 

 NOW, THEREFORE, in consideration of the foregoing and the mutual agreements and covenants
contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
 1. Definitions. 
 (a) Additional Definitions. As used herein, the
following terms shall have the meanings given to them below and the Loan Agreement and the other Financing Agreements are hereby amended to include, in addition and not in limitation, the following definitions: 

(i) “Amendment No. 6” shall mean Amendment No. 6 to Loan and Security Agreement, dated as of December 31,
2012, by and among Agent, Lenders, Borrowers and Guarantors, as the same now exists or may hereafter be amended, modified, supplemented, extended, renewed, restated or replaced. 

(ii) “Amendment No. 6 Effective Date” shall mean the date on which each of the conditions precedent to the
effectiveness of Amendment No. 6 are satisfied or are waived by Agent. 
 (b) Amendments to Definitions. As used
herein or in the Loan Agreement or any of the other Financing Agreements, the following terms are hereby amended as set forth below: 
 (i) The definition of “Borrowers” set forth in the Loan Agreement is hereby deleted in its entirety and the following substituted therefor: 

“ “Borrowers” shall mean the Company, Coated Sand Solutions, LLC, a wholly-owned subsidiary of the
Company organized under the laws of the State of Delaware, as a Subsidiary Borrower under the Loan Agreement, and each other Subsidiary Borrower.” 
 (ii) The definition of “Borrowing Base” set forth in the Loan Agreement is hereby deleted in its entirety and the following substituted therefor: 

“ “Borrowing Base” shall mean, at any time, the amount equal to: 

(a) eighty-five percent (85%) of Eligible Accounts; plus 

(b) the lesser of 
 (i) the lesser of (A) sum of (1) thirty percent (30%) multiplied by the Value of the Eligible WIP Inventory and (2) $5,000,000 and (B) sixty percent (60%) multiplied by the
Value of the Eligible Finished Goods Inventory and 
 (ii) $15,000,000; plus 

(c) the lesser of (i) eighty-five percent (85%) of Eligible ITT Receivables and (ii) $1,500,000; minus

 (d) Reserves established from time to time by the Agent. 

Subject to the relevant terms and provisions set forth in this Agreement, including specifically Section 11.3, the
Agent at all times 

  
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shall be entitled to reduce or increase the advance rates and standards of eligibility under this Agreement, in each case in its commercially reasonable discretion. 

In the event that based upon any Borrowing Base Certificate hereunder the aggregate amount of Loans and Letters of Credit
at any time outstanding based on Eligible Inventory exceeds $10,000,000, Agent shall promptly at Borrowers’ expense conduct an Inventory Appraisal and, following the receipt of the results thereof, clause (b) above shall be deemed to be
restated as follows: 
 “(b) the least of: 

(i) the lesser of (A) sum of (1) thirty percent (30%) multiplied by the Value of the Eligible WIP Inventory
and (2) $5,000,000 and (B) sixty-five percent (65%) multiplied by the Value of the Eligible Finished Goods Inventory, 
 (ii) eighty-five (85%) of the net orderly liquidation value of the Eligible Finished Goods Inventory as determined by Agent; and 

(iii) $15,000,000.” 
 (iii) The definition of “Interest Rate” set forth in the Loan Agreement is hereby amended to delete the pricing grid set forth therein in its entirety and substitute the following therefor:

  

																			
	 Tier
	  	 Quarterly Average Excess Availability
	  	Prime Rate
Loans	 	 	Eurocurrency
Rate
Loans	 	 	Letter of
Credit 
Fee	 	 	Unused
Line
Fee	 
	 1
	  	 Greater than $10,000,000
	  	 	1.50	% 	 	 	2.50	% 	 	 	2.50	% 	 	 	0.375	% 
	 2
	  	 Equal to or less than $10,000,000
	  	 	1.75	% 	 	 	2.75	% 	 	 	2.75	% 	 	 	0.375	% 

 (iv) The definition of “Interest Rate” set forth in the Loan Agreement is hereby further
amended to delete clause (c) thereof in its entirety and substitute the following therefor: 
 “(c) The
Interest Rate shall be based on Tier 2 (as shown above) as of the Amendment No. 6 Effective Date and shall remain at Tier 2 until the last day of the second complete fiscal quarter following the Amendment No. 6 Effective Date.”

 (v) The definition of “Letter of Credit Limit” set forth in the Loan Agreement is hereby deleted in its entirety
and the following substituted therefor: 
 “ “Letter of Credit Limit” shall mean
$20,000,000.” 

  
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 (vi) The definition of “Maximum Credit” set forth in the Loan Agreement is hereby
deleted in its entirety and the following substituted therefor: 
 “ “Maximum Credit” shall
mean the amount of $50,000,000 (as such amount may be reduced from time to time as provided in the definition of “Reserves” or in Section 2.1(e)).” 
 (c) Interpretation. For purposes of this Amendment No. 6, all terms used herein which are not otherwise defined herein, including but not limited to, those terms used in the recitals hereto,
shall have the respective meanings assigned thereto in the Loan Agreement as amended by this Amendment No. 6. 
 2.
Change in Laws. Section 3.3 of the Loan Agreement is hereby amended by adding the following clause (e) at the end thereof: 
 “(e) For purposes of this Section 3.3, the Dodd-Frank Wall Street Reform and Consumer Protection, the Basel Committee on Banking Supervision (or any successor or similar authority), the Bank for
International Settlements and all rules, regulations, orders, requests, guidelines or directives in connection therewith are deemed to have been enacted and become effective after the date of this Agreement.” 

3. Term. The first sentence of Section 13.1 of the Loan Agreement is hereby deleted in its entirety and the following
substituted therefor: 
 “This Agreement and the other Financing Agreements shall become effective as of the
date set forth on the first page hereof and shall continue in full force and effect for a term ending on October 31, 2016 (the “Termination Date”). 

Section 13.1 is further amended to add the following Section 13.1(c) at the end thereof: 

“(c) If for any reason this Agreement is terminated prior to the Termination Date, in view of the impracticality and extreme
difficulty of ascertaining actual damages and by mutual agreement of the parties as to a reasonable calculation of Agent’s and each Lender’s lost profits as a result thereof, Borrowers agree to pay to Agent, for the benefit of Lenders,
upon the effective date of such termination, an early termination fee in the amount equal to one-half (1/2%) percent of the Maximum Credit.” 

  
 4 

 4. Notices. Section 13.3 of the Loan Agreement is hereby amended by deleting the
information for Agent in its entirety and substituting the following therefor: 
  

			
	“The Agent:	  	 Wells Fargo Bank, National Association
 1 South Broad Street Y1375-031
 Philadelphia, Pennsylvania 19107

Attention: James A. Kelly, VP
 Telephone No.:
267-321-6685
 Telecopier No.: 267-321-6741”

 5. Amendment Fee. Borrowers shall on the date hereof pay to Agent, for the benefit of Lenders, an
amendment fee in the amount of $30,000, or Agent, at its option, may charge the account(s) of Borrowers maintained by Agent the amount of such fee, which fee is earned as of the date hereof and shall constitute part of the Obligations. 

6. Representations and Warranties. Each of the Loan Parties, jointly and severally, hereby represents and warrants with and to
Agent and Lenders as follows, which representations and warranties shall survive the execution and delivery hereof, the truth and accuracy of, or compliance with each, together with the representations, warranties and covenants in the other
Financing Agreements, being a continuing condition of the making of any Loans by Lenders (or Agent on behalf of Lenders) to Borrowers: 
 (a) after giving effect to this Amendment No. 6, no Default or Event of Default exists or has occurred and is continuing as of the date of this Amendment No. 6; and 

(b) this Amendment No. 6 has been duly executed and delivered by the Loan Parties and the agreements and obligations of the Loan
Parties contained herein constitute legal, valid and binding obligations of the Loan Parties enforceable against the Loan Parties in accordance with their respective terms. 
 7. Conditions Precedent. The amendments contained herein shall only be effective upon the satisfaction of each of the following conditions precedent in a manner satisfactory to Agent: 

(a) Agent shall have received counterparts of this Amendment No. 6, duly authorized, executed and delivered by the Loan Parties and
Required Lenders; 
 (b) Agent shall have received, in form and substance satisfactory to Agent, a Borrower Joinder Agreement,
or an amendment to the Guarantor Joinder Agreement presently in effect between Coated Sand and Agent, as Agent may determine, in either case duly authorized, executed and delivered by Coated Sand; 

(c) Agent shall have received, in form and substance satisfactory to Agent, updated schedules to the Loan Agreement and the other
Financing Agreements reflecting information applicable to Loan Parties as of the Amendment No. 6 Effective Date; 
 (d)
Agent shall have received a true, correct and complete list of “transload” locations of Borrowers as of the Amendment No. 6 Effective Date and bailee letters or similar Collateral Access Agreements in form and substance satisfactory
to Agent with respect to Borrowers’ arrangements with third parties at such locations; 

  
 5 

 (e) Agent shall have received, in form and substance satisfactory to Agent, an
Officer’s Certificate from Parent to the effect that the representations and warranties in Section 8 of the Credit Agreement are true, correct and complete in all material respects on and as of the Amendment No. 6 Effective Date to
the same extent as though made on and as of that date (or, to the extent such representations and warranties specifically relate to an earlier date, that such representations and warranties were true, correct and complete in all material respects on
and as of such earlier date), that each Loan Party shall have performed in all material respects all agreements and satisfied all conditions which this Amendment No. 6 provides shall be performed or satisfied by it on or before the Amendment
No. 6 Effective Date except as otherwise disclosed to and agreed to in writing by Agent and that no Default or Event of Default has occurred and is continuing; provided, that, if a representation and warranty, covenant or
condition is qualified as to materiality, the applicable materiality qualifier set forth above shall be disregarded with respect to such representation and warranty, covenant or condition for purposes of this condition; 

(f) Agent shall have received a true and correct copy of each consent, waiver or approval (if any) to or of this Amendment No. 6,
which the Loan Parties are required to obtain from any other Person, and such consent, approval or waiver (if any) shall be in form and substance reasonably satisfactory to Agent; and 

(g) after giving effect to this Amendment No. 6, no Default or Event of Default shall exist or have occurred and be continuing as of
the date of this Amendment No. 6 or the Amendment No. 6 Effective Date. 
 8. Effect of Amendment No. 6.
Except as expressly set forth herein, no other consents, amendments, changes or modifications to the Financing Agreements are intended or implied, and in all other respects the Financing Agreements are hereby specifically ratified, restated and
confirmed by all parties hereto as of the effective date hereof and the Loan Parties shall not be entitled to any other or further amendment by virtue of the provisions of this Amendment No. 6 or with respect to the subject matter of this
Amendment No. 6. To the extent of conflict between the terms of this Amendment No. 6 and the other Financing Agreements, the terms of this Amendment No. 6 shall control. The Loan Agreement and this Amendment No. 6 shall be read
and construed as one agreement. 
 9. Governing Law. The validity, interpretation and enforcement of this Amendment
No. 6 and any dispute arising out of the relationship between the parties hereto whether in contract, tort, equity or otherwise, shall be governed by the internal laws of the State of New York but excluding any principles of conflicts of law or
other rule of law that would cause the application of the law of any jurisdiction other than the laws of the State of New York. 

10. Jury Trial Waiver. BORROWERS, GUARANTORS, AGENT AND LENDERS EACH HEREBY WAIVES ANY RIGHT TO TRIAL BY JURY OF ANY CLAIM,
DEMAND, ACTION OR CAUSE OF ACTION ARISING UNDER THIS AMENDMENT NO. 6 OR ANY OF THE OTHER FINANCING AGREEMENTS OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE DEALINGS OF THE PARTIES HERETO IN RESPECT OF THIS AMENDMENT NO. 6 OR ANY OF
THE OTHER FINANCING AGREEMENTS OR THE TRANSACTIONS RELATED HERETO OR THERETO IN EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING, AND WHETHER IN 

  
 6 

 
CONTRACT, TORT, EQUITY OR OTHERWISE. BORROWERS, GUARANTORS, AGENT AND LENDERS EACH 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 BORROWERS, GUARANTORS, AGENT OR ANY LENDER MAY FILE AN ORIGINAL COUNTERPART OF A COPY OF THIS AMENDMENT NO. 6 WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT OF THE PARTIES HERETO TO THE WAIVER OF THEIR RIGHT TO TRIAL
BY JURY. 
 11. Binding Effect. This Amendment No. 6 shall be binding upon and inure to the benefit of each of the
parties hereto and their respective successors and assigns. 
 12. Waiver, Modification, Etc. No provision or term of
this Amendment No. 6 may be modified, altered, waived, discharged or terminated orally, but only by an instrument in writing executed by the party against whom such modification, alteration, waiver, discharge or termination is sought to be
enforced. 
 13. Further Assurances. the Loan Parties shall execute and deliver such additional documents and take such
additional action as may be reasonably requested by Agent to effectuate the provisions and purposes of this Amendment No. 6. 
 14. Entire Agreement. This Amendment No. 6 represents the entire agreement and understanding concerning the subject matter hereof among the parties hereto, and supersedes all other prior
agreements, understandings, negotiations and discussions, representations, warranties, commitments, proposals, offers and contracts concerning the subject matter hereof, whether oral or written. 

15. Headings. The headings listed herein are for convenience only and do not constitute matters to be construed in interpreting
this Amendment No. 6. 
 16. Counterparts. This Amendment No. 6 may be executed in any number of counterparts,
each of which shall be an original, but all of which taken together shall constitute one and the same agreement. Delivery of an executed counterpart of this Amendment No. 6 by telefacsimile or other electronic method of transmission shall have
the same force and effect as delivery of an original executed counterpart of this Amendment No. 6. Any party delivering an executed counterpart of this Amendment No. 6 by telefacsimile or other electronic method of transmission shall also
deliver an original executed counterpart of this Amendment No. 6, but the failure to do so shall not affect the validity, enforceability, and binding effect of this Amendment No. 6. 

  
 7 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 6 to be duly
executed and delivered by their authorized officers as of the day and year first above written. 
  

			
	WELLS FARGO BANK, NATIONAL ASSOCIATION, successor by merger to Wachovia Bank, National Association, as Agent and a Lender
		
	By:	 	 /s/ James A. Kelly

		
	Title:	 	Vice President

 [SIGNATURES CONTINUED ON NEXT PAGE] 

  
 Amendment No. 6
to LSA - U.S. Silica 

 [SIGNATURES CONTINUED FROM PREVIOUS PAGE] 

 

									
	U.S. SILICA COMPANY	 		 	OTTAWA SILICA COMPANY
					
	By:	 	 /s/ Michael Thompson
	 		 	By:	 	 /s/ Michael Thompson

					
	Title:	 	Treasurer	 		 	Title:	 	Treasurer
			
	THE FULTON LANE AND TIMBER COMPANY	 		 	USS HOLDINGS, INC.
					
	By:	 	 /s/ Michael Thompson
	 		 	By:	 	 /s/ Michael Thompson

					
	Title:	 	Treasurer	 		 	Title:	 	Treasurer
			
	PENNSYLVANIA GLASS SAND CORPORATION	 		 	BMAC SERVICES CO., INC.
					
	By:	 	 /s/ Michael Thompson
	 		 	By:	 	 /s/ Michael Thompson

					
	Title:	 	Treasurer	 		 	Title:	 	Treasurer
				
	COATED SAND SOLUTIONS, LLC	 		 		 	
					
	By:	 	 /s/ Michael Thompson
	 		 		 	
					
	Title:	 	Treasurer	 		 		 	

  
 Amendment No. 6
to LSA - U.S. Silica

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