Document:

EX-10.19

 Exhibit 10.19 

Certain confidential information has been omitted from this Exhibit 10.19 pursuant to a request for confidential treatment filed separately with the
Securities and Exchange Commission. The omitted information is indicated by the symbol “* * *” at each place in this Exhibit 10.19 where the omitted information appeared in the original. 

FIRST AMENDMENT 
 TO

 SYNTHETIC GYPSUM SUPPLY AGREEMENT 

This First Amendment To Synthetic Gypsum Supply Agreement (“Amendment”) is made between Synthetic Materials, LLC, a Florida Limited Liability
Company with its principal place of business at 244 Old Highway 149, PO Box 87, Cumberland City, Tennessee, 37050 (“SynMat”); and Lafarge North America Inc., a Maryland corporation, with its principal place of business at 12950 Worldgate
Drive, Herndon, Virginia 20170 (“Lafarge”), and effective as of February 16, 2009 (“Amendment Effective Date”). 
 WHEREAS, SynMat
and Lafarge are parties to that certain Synthetic Gypsum Supply Agreement, dated December 11, 2007 (“Supply Agreement”), related to the supply and purchase of synthetic gypsum materials; and 

WHEREAS, SynMat and Lafarge wish to amend, in part, the terms and conditions of the Supply Agreement. 

NOW, THEREFORE, the parties hereto agree to amend the Supply Agreement as follows: 
  

	 	1.	In the first sentence of Section 1(B), the words “December 1st” shall be deleted and replaced with “July 1st”. 

 

	 	2.	In the fifth sentence of Section 4(B), the words “July 1” shall be deleted and replaced with “January 1”. 

  

	 	3.	In the first sentence of Section 5(A), the words “July 1, 2010” shall be deleted and replaced with “January 1, 2010”. 

 

	 	4.	Section 5(B) shall be deleted in its entirety and replaced with the following paragraph: “B. The Term of this Agreement shall begin on the Effective date and end at the conclusion of the Supply Term, or any
Renewal Supply Term(s) (“Term”). Lafarge shall purchase any Gypsum produced by SynMat’s facilities prior to January 1, 2010, at the price effective January 1, 2010. If Lafarge purchases Gypsum prior to January 1, 2010,
the tonnage amount will not be included in the tonnage requirements of the first contract year of the Supply Term.” 

  

	 	5.	 Section 6(A) shall be deleted in its entirety and replaced with the following paragraph: “A. Lafarge shall pay SynMat a Base Price of
* * *, subject to an annual adjustment on January 1st of each year starting January 1, 2011, for Gypsum loaded into barges at the loading dock at the Morgantown power station. The annual adjustment will be calculated within ten
days following publication 

	 	
* * *. The adjustment calculation shall be * * *. In no event shall the price increase or decrease more than * * * compared to the prior year. During the Term of
this Agreement the Adjusted Price shall never be less than the initial Base Price.” 

  

	 	6.	Section 15 shall be amended by adding the following new sentence after the end of the first sentence: “January shipments will be invoiced only after the new price is determined under Section 6(A).”

  

	 	7.	Except as modified under this Amendment, the terms and conditions of the Supply Agreement shall remain valid with full force and effect. 

IN WITNESS WHEREOF, the parties hereto execute this Amendment as of the Amendment Effective Date. 

 

			
	SYNTHETIC MATERIALS, LLC
		
	By:	 	 /s/ Sean P. Colgan

		
	Name:	 	 Sean P. Colgan

		
	Title:	 	 Chairman

	
	LAFARGE NORTH AMERICA INC.
		
	By:	 	 /s/ Ike Preston

		
	Name:	 	 Ike Preston

		
	Title:	 	 President LNA GypsumEX-10.20

 Exhibit 10.20 

ASSIGNMENT AND ASSUMPTION AGREEMENT 
 FOR
AND IN CONSIDERATION of the sum of Ten Dollars ($10.00) and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledges, SYNTHETIC MATERIALS, LLC, a Florida limited liability company
(“Assignor”), hereby sells, transfers, assigns, bargains, grants, conveys, delivers and sets over unto MIRANT MID-ATLANTIC, LLC, a Delaware limited liability company (“Assignee”), all of
Assignor’s right title and interest to and under that certain Synthetic Gypsum Supply Agreement by and between Assignor and Lafarge North America Inc. (“Lafarge”), a Maryland corporation (the “Assigned
Contract”). 
 Assignee does hereby accept this assignment under this Assignment and Assumption Agreement and Assignee does
hereby assume and become responsible for and agree to perform, discharge, fulfill and observe all of the obligations, terms, covenants, provisions and conditions under the Assigned Contract occurring from and after the date hereof, and Assignee
agrees to be liable for the observance and performance thereof as fully as though Assignee was the original party thereunder. 
 This
Assignment and Assumption Agreement shall be binding upon and shall inure to the benefit of Assignor and Assignee and their respective beneficiaries, legal representatives, heirs, successors and assigns. 

Assignor hereby agrees to perform, execute and deliver or cause to be performed, executed and delivered any and all such further acts,
documents and assurances as Assignee may reasonably require to perfect Assignee’s interest in the Assigned Contract. 
 This Assignment
and Assumption Agreement may be executed in counterparts, and as so executed shall constitute one and the same agreement. 
 This Assignment
and Assumption Agreement shall be governed under the laws of the State of Maryland. 
 The assignment contemplated under this Assignment and
Assumption Agreement shall be considered a novation of the Assignment Contract. 

 IN WITNESS WHEREOF, the each party has caused its duly authorized representative to execute the
Assignment and Assumption Agreement as of the 10th day of May, 2010. 
  

			
	ASSIGNOR:
	
	SYNTHETIC MATERIALS, LLC
		
	By:	 	 /s/ John Glasscock

		
	Name:	 	 John Glasscock

		
	Title:	 	 President

	
	ASSIGNEE:
	
	MIRANT MID ATLANTIC, LLC
		
	By:	 	 /s/ Robert Patrick

		
	Name:	 	 Robert Patrick

		
	Title:	 	 Program Director, AQCS

 For purposes of acknowledging the existence of the Assignment and Assumption Agreement, Lafarge has
caused its duly authorized representative to execute the Assignment and Assumption Agreement as of the Effective Date: 
  

			
	LAFARGE NORTH AMERICA INC.
		
	By:	 	 /s/ John Dickman

		
	Name:	 	 John Dickman

		
	Title:	 	 Director - PurchasingEX-10.21

 Exhibit 10.21 

Certain confidential information has been omitted from this Exhibit 10.21 pursuant to a request for confidential treatment filed separately with the
Securities and Exchange Commission. The omitted information is indicated by the symbol “* * *” at each place in this Exhibit 10.21 where the omitted information appeared in the original. 

[DUKE ENERGY LETTERHEAD] 
 January 4,
2010 
 Mr. John Dickman 
 Director of Purchasing 

Lafarge North American Inc. 
 12950 Worldgate Drive, Suite 400

 Herndon, VA 20170 
 Subject: Letter of Understanding -
Between Duke Energy (Miami Fort Station) and Lafarge 
 Dear Mr. Dickman, 

In reference to the Amended and Restated Gypsum Contract dated June 8, 2005 between The Cincinnati Gas & Electric Company, an Ohio corporation
and operating owner of the Miami Fort Generating Station (“Miami Fort Station”) located in North Bend, Ohio (CG&E), and Lafarge North America, Inc., a Maryland corporation (“Lafarge”), this Letter of Understanding revises the
“test method” for the testing of * * * of the contract. 
 Below is the new agreed upon test method for testing * * *
effective per this Letter of Understanding: 
 * * *. 

We appreciate the cooperation between the Silver Grove and Miami Fort personnel to investigate and resolve this test method issue. 

 

	
	Sincerely,
	
	/s/ Tony R. Mathis
	
	Tony R. Mathis, P.E.
	Director - Byproducts Management
	Duke Energy Corporation

  

	cc:	Mr. Ken Britt (Lafarge) 

 Mr. Scott Walton (Lafarge) 

Mr. Ben G. Ruggiero (Duke Energy) 

Mr. Steven Chipman (Duke Energy) 

Mr. Richard T. Wilburn (Duke Energy)EX-10.22

 Exhibit 10.22 

Certain confidential information has been omitted from this Exhibit 10.22 pursuant to a request for confidential treatment filed separately with the
Securities and Exchange Commission. The omitted information is indicated by the symbol “* * *” at each place in this Exhibit 10.22 where the omitted information appeared in the original. 

DECEMBER 2009 AMENDMENT TO GYPSUM CONTRACT 

This December 2009 Amendment to the Gypsum Contract dated December 29, 1998 (“December 2009 Amendment”) is entered into as of
the 22nd day of December, 2009, by and between Duke Energy Ohio, Inc. (“DEO”), formerly known as The Cincinnati Gas and Electric Company, The Dayton Power & Light Company (“DP&L”) and Columbus Southern Power Company
(“CSP”), each an Ohio corporation and owners (collectively “Owners”) of the Wm H. Zimmer Generating Station located in Moscow, Ohio (“Zimmer”) and by Lafarge North America Inc., a Maryland corporation,
(“Lafarge”). The Owners and Lafarge may he referred collectively as the Parties or individually, as a Party. 
 WHEREAS, the
Parties entered into a Gypsum contract, dated December 29, 1998 (the “Agreement”); and 
 WHEREAS, the Parties desire to
amend certain terms and conditions of the Agreement; 
 NOW THEREFORE, for and in consideration of the premises contained herein and other
good and valuable consideration, the Parties hereby agree as follows: 
  

	 	1.	Unless otherwise defined, all capitalized terms used in this December 2009 Amendment shall have the meanings set forth in the Agreement. 

 

	 	2.	Section 3A of the Agreement is hereby deleted in its entirety and replaced with the following: 

  

	 	A.	Complying Gypsum shall meet each of the specifications set forth in Amended Exhibit A. Gypsum shall be sampled and its compliance with the specifications in Amended Exhibit A shall be determined in accordance with the
protocols set forth in Amended Exhibit A, except to the extent such protocols are modified by the subparagraphs below. All such sampling and testing shall occur prior to loading the gypsum on Lafarge’s barges or prior to storage of gypsum at
the Owners’ site. Sampling shall be at the Owners’ expense. 

  

	 	(i)	All tests results that are required by this December 2009 Amendment or the Agreement, whether for Complying or Non-Complying Gypsum, shall be provided to Lafarge in the format agreed upon by the Parties and to the
individuals designated by the Parties at the frequency provided for in Amended Exhibit A and/or in the subparagraphs below. 

  

	 	(ii)	 If, pursuant to Amended Exhibit A, any specification other than * * * requires that testing be done either * * * or more
frequently 

  
 1 

	 	
than * * * and such testing indicates that the Gypsum is Non-Complying, all Gypsum produced after receipt of the first non-complying test result by Owners will be deemed Non-Complying
until new testing, done at such a time as Owner chooses, indicates that the Gypsum is Complying. 

  

	 	(iii)	If testing for * * *, done at the frequency specified in Amended Exhibit A, indicates that the Gypsum exceeds the specification for * * *, all Gypsum produced after the receipt of such test result by
Owners shall be deemed Non-Complying Gypsum until four (4) additional and consecutive tests, at least five (5) minutes apart, indicate that gypsum produced after the first of those four tests is Complying Gypsum. Thereafter, testing for
* * * will return to the frequency set forth in Amended Exhibit A. 

  

	 	(iv)	If, pursuant to Amended Exhibit A, any specification requires that testing be done less frequently than * * * and such testing indicates that the gypsum is Non-Complying Gypsum, all gypsum produced after
receipt of such test results by Owners will be deemed Non-Complying Gypsum until additional testing, done at a time of Owners’ choosing, indicates that the gypsum is Complying Gypsum. For purposes of this subparagraph only, all material
produced fourteen (14) days prior to receipt of the test indicating the gypsum is Non-Complying Gypsum will also be deemed Non-Complying Gypsum. At their discretion, Owners may re-test such gypsum for the specific parameter in question, using
one of each day’s four retained Zimmer controlled split samples that were taken in each of the fourteen days. The test results of a particular day’s sample will determine whether the related day’s material is Complying Gypsum. Any
Non-Complying Gypsum will be deducted from the current or next subsequent invoice. 

  

	 	3.	The following paragraphs are added to Section 3 entitled “Complying Gypsum.” 

  

	 	C.	If within fourteen (14) days after Lafarge has taken title to gypsum that it believed was Complying Gypsum and, in using such gypsum, Lafarge experiences significant operational problems that materially affect its
production and such operational problems are reasonably and verifiably related to gypsum produced by Owners, then Lafarge may, at its expense, retest such gypsum for those specifications that are subject to daily or more frequent-than-daily testing,
except pH testing. If such test results indicate that at least * * * of such gypsum are Non-Complying Gypsum, Lafarge shall notify Owners and supply such test results. 

 

	 	(i)	Within ten (10) days of the receipt of notice under this Paragraph, Owners shall, at their expense, retest the daily retained Zimmer controlled split samples for each day in which any of the * * * of
allegedly Non-Complying Gypsum was produced, for the specific parameter in question. 

	 	(ii)	If the Owners’ re-tests indicate that gypsum produced on a particular day was Non-Complying Gypsum, the percent of Gypsum produced that day(s) will be multiplied by the total gypsum produced during the period in
question to determine what amount is Non-Complying Gypsum. That amount of Non-Complying Gypsum will be deducted from current or subsequent invoices in accordance with the terms of this Agreement. 

 

	 	(iii)	If testing by Lafarge and Owners is inconsistent, either Party may conduct further testing through a mutually agreed upon third party laboratory. The results of such third party laboratory shall be deemed conclusive and
the Party whose results are inconsistent with the third party laboratory testing shall pay for the third party testing. 

  

	 	D.	As set forth in Amended Exhibit A, Lafarge shall accept gypsum as Complying Gypsum where such gypsum has a * * * of no more than or equal to * * *. Lafarge may accept gypsum as Complying Gypsum that
has a * * * exceeding * * *. If the monthly average * * * is greater than * * *, Owners will discount the then current Gypsum price by * * * for the tons supplied in the calendar month during which
the monthly average of the * * * exceeds * * *, except that if Lafarge accepts gypsum with an * * * of greater than * * *, such gypsum shall not be used in calculating the monthly average. Such discount will
be shown on the monthly invoice. The monthly average shall be calculated by adding together the * * * on each day during the calendar month in which Lafarge took title to gypsum, not including any day in the calendar month on which Lafarge
accepted delivery of gypsum with an * * * greater than * * *, and dividing it by the number of days in that month on which Lafarge took such delivery of Gypsum, not including days in the calendar month on Lafarge accepted deliver
of gypsum with an * * * greater than * * *. 

  

	 	E.	As set forth in Amended Exhibit A, Lafarge shall accept gypsum as Complying for which * * * are * * * or less. Lafarge may accept gypsum as Complying Gypsum for which * * * exceeds
* * * but such gypsum shall not be included in the calculation of the monthly average * * * test set forth in Amended Exhibit A. 

  

	 	4.	Section 4 of the Agreement is hereby deleted in its entirety and replaced with the following: 

  

	 	A.	 Lafarge may, at its discretion, accept any gypsum that, based on Owner’s specification testing in compliance with Amended Exhibit A, is
Non-Complying Gypsum. If Lafarge accepts Non-Complying Gypsum, such 

	 	
gypsum will be deemed Complying Gypsum under all provisions of the Agreement and is not subject to retesting or reclassification as Non-Complying Gypsum under either this December 2009 Amendment
or any other section of the Agreement. 

  

	 	B.	In the event a Lafarge barge is partially loaded with Non-Complying Gypsum and later testing reveals that such gypsum is Non-Complying Gypsum, the entire barge will be treated as Non-Complying Gypsum, except as set
forth in subparagraph (i) below. 

  

	 	(i)	If Lafarge has accepted the Non-Complying Gypsum pursuant to Subparagaph 4(A), the entire barge will be designated as Complying Gypsum. 

 

	 	(ii)	If Lafarge rejects the Non-Complying Gypsum, Lafarge will not be deemed to have taken title to such gypsum and all costs related to the transportation and handling of such gypsum will be at Owners’ expense.
However, Lafarge will unload such barge at its facility and segregate the Non-Complying Gypsum. Owners shall remove such gypsum within four (4) weeks of the unloading and segregation, provided that Lafarge provides notice of the same. If Owners
fail to remove such gypsum within four (4) weeks of notice, Lafarge may dispose of the gypsum in a commercially reasonable and environmentally responsible manner at Owner’s cost. For purposes of this subsection, Lafarge will provide Owners
with documentation of its costs of barge freight, barge unloading and disposal costs in handling the gypsum. Lafarge will charge * * * for segregation and truck loading costs. Any and all such costs, if not unreasonable, shall be clearly
deducted from the next invoice by Owners. 

  

	 	5.	Section 7C is amended by adding the following sentence to the end of that Paragraph: 

“Effective June 1, 2009, * * * will be added to the then effective contract price per ton of Complying Gypsum.” 

 

	 	6.	Exhibit A is hereby deleted in its entirety and replaced with the following: 

 Exhibit A, as Amended 

* * * 

	 	7.	Except as provided herein and in any previously executed amendments to the Gypsum Contract, the Agreement shall remain unchanged and any additional amendments must be in writing and executed by the parties.

  

	 	8.	The December 2009 Amendment to the Gypsum Contract may be executed in one or more counterparts, each of which shall be considered an original and all of which shall constitute but one and the same instrument.

 Duke Energy Ohio, Inc. 
  

			
	Signature:	 	 /s/ Charles R. Whitlock

	
	Name: Charles R. Whitlock

 “for and on behalf of Duke Energy
Ohio, Inc. as partial owner and operator (and as operator. for and on behalf of the other owners)” 
 Title: Senior Vice President - Midwest
Non-Regulated Generation Operations 

			
		
	Date:	 	 2-4-10

	
	Lafarge North America, Inc.
		
	Signature:	 	 /s/ Ike Preston

		
	Name:	 	 Ike Preston

		
	Title:	 	 President

		
	Date:	 	 3/5/10

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