Document:

EX-10.3

 Exhibit 10.3 

FORM OF 
 OMNIBUS
AGREEMENT 
 among 

WESTLAKE MANAGEMENT SERVICES, INC. 

WESTLAKE CHEMICAL PARTNERS GP LLC 

WESTLAKE CHEMICAL PARTNERS LP 

WESTLAKE CHEMICAL OPCO GP LLC 

WESTLAKE CHEMICAL OPCO LP 

WPT LLC 
 WESTLAKE
LONGVIEW CORPORATION 
 WESTLAKE PETROCHEMICALS LLC 

WESTLAKE VINYLS, INC. 

WESTLAKE PVC CORPORATION 

WESTLAKE STYRENE LLC 

WESTLAKE POLYMERS LLC 

and 
 WESTLAKE VINYL
CORPORATION 

 TABLE OF CONTENTS 

 

							
	 ARTICLE I
	    	 DEFINITIONS; CONSTRUCTION
	  	 	1	  
	 Section 1.1
	    	 Definitions
	  	 	1	  
	 Section 1.2
	    	 Construction
	  	 	8	  
			
	 ARTICLE II
	    	 INDEMNIFICATION
	  	 	8	  
	 Section 2.1
	    	 Environmental Indemnification
	  	 	8	  
	 Section 2.2
	    	 Additional Indemnification
	  	 	9	  
	 Section 2.3
	    	 Consequential Damages
	  	 	11	  
	 Section 2.4
	    	 Indemnification Procedures
	  	 	11	  
			
	 ARTICLE III
	    	 SERVICES
	  	 	12	  
	 Section 3.1
	    	 Scope of Services
	  	 	12	  
	 Section 3.2
	    	 Exclusion of Services
	  	 	12	  
	 Section 3.3
	    	 Performance of Services by Affiliates or Other Persons
	  	 	12	  
	 Section 3.4
	    	 Payment Amount
	  	 	12	  
	 Section 3.5
	    	 Payment of the Payment Amount
	  	 	14	  
	 Section 3.6
	    	 Disputed Charges
	  	 	14	  
	 Section 3.7
	    	 Employees
	  	 	14	  
	 Section 3.8
	    	 Limitation of Duties and Liability
	  	 	14	  
			
	 ARTICLE IV
	    	 RIGHT OF FIRST REFUSAL
	  	 	15	  
	 Section 4.1
	    	 Westlake Right of First Refusal
	  	 	15	  
	 Section 4.2
	    	 Procedures
	  	 	15	  
			
	 ARTICLE V
	    	 REPRESENTATIONS AND WARRANTIES
	  	 	17	  
	 Section 5.1
	    	 Representations by the Westlake Parties
	  	 	17	  
	 Section 5.2
	    	 Representations by Partnership Entities
	  	 	18	  
			
	 ARTICLE VI
	    	 INSURANCE
	  	 	19	  
	 Section 6.1
	    	 Westlake Insurance
	  	 	19	  
	 Section 6.2
	    	 MLP Insurance
	  	 	21	  
	 Section 6.3
	    	 Certificates; Proof of Loss
	  	 	22	  
	 Section 6.4
	    	 Payment of Deductible Amounts
	  	 	22	  
	 Section 6.5
	    	 Contractor’s Insurance
	  	 	22	  
			
	 ARTICLE VII
	    	 CONFIDENTIAL INFORMATION
	  	 	24	  
	 Section 7.1
	    	 Information
	  	 	24	  
	 Section 7.2
	    	 Definition
	  	 	24	  
	 Section 7.3
	    	 Legal Requirement
	  	 	24	  
	 Section 7.4
	    	 Survival
	  	 	25	  
			
	 ARTICLE VIII
	    	 INTELLECTUAL PROPERTY
	  	 	25	  
	 Section 8.1
	    	 Ownership by the Westlake Entities and License to MLP
	  	 	25	  
	 Section 8.2
	    	 License to the Westlake Entities and their Affiliates
	  	 	25	  

  
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	 ARTICLE IX
	    	 TERM; MISCELLANEOUS
	  	 	25	  
	 Section 9.1
	    	 Term
	  	 	25	  
	 Section 9.2
	    	 Choice of Law; Submission to Jurisdiction
	  	 	25	  
	 Section 9.3
	    	 Dispute Resolution
	  	 	26	  
	 Section 9.4
	    	 Notice
	  	 	27	  
	 Section 9.5
	    	 Entire Agreement
	  	 	28	  
	 Section 9.6
	    	 Amendment or Modification
	  	 	28	  
	 Section 9.7
	    	 Assignment
	  	 	28	  
	 Section 9.8
	    	 Counterparts
	  	 	28	  
	 Section 9.9
	    	 Severability
	  	 	28	  
	 Section 9.10
	    	 Further Assurances
	  	 	28	  
	 Section 9.11
	    	 No Waiver
	  	 	28	  
	 Section 9.12
	    	 Set Off
	  	 	28	  
	 Section 9.13
	    	 Rights of Third Parties
	  	 	28	  

  

			
	Schedule I	    	Westlake Complexes
		
	Schedule II	    	Services

  
 ii 

 OMNIBUS AGREEMENT 

THIS OMNIBUS AGREEMENT (“Agreement”) is entered into on, and effective as of, the Closing Date (as defined herein),
and is by and among Westlake Management Services Inc., a Delaware corporation (“Westlake Services”), Westlake Chemical Partners GP LLC, a Delaware limited liability company (“GP”), Westlake Chemical Partners LP, a
Delaware limited partnership (the “MLP”), Westlake Chemical OpCo GP LLC, a Delaware limited liability company (“Operating GP”), Westlake Chemical OpCo LP, a Delaware limited partnership (“OpCo”),
WPT LLC, a Delaware limited liability company (“WPT”), Westlake Longview Corporation, a Delaware Corporation (“Westlake Longview”), Westlake Petrochemicals LLC, a Delaware limited liability company
(“Westlake Petrochemicals”), Westlake Vinyls, Inc., a Delaware corporation (“Westlake Vinyls”, and together with WPT, Westlake Longview and Westlake Petrochemicals, the “Westlake Contributors”),
Westlake PVC Corporation, a Delaware corporation (“Westlake PVC”), Westlake Styrene LLC, a Delaware limited liability company (“Westlake Styrene”), Westlake Polymers LLC, a Delaware limited liability company
(“Westlake Polymers”), and Westlake Vinyl Corporation, a Delaware corporation (“Vinyl Corporation” and together with Westlake Styrene, Westlake Polymers and the Westlake Contributors, the “Westlake Complex
Parties”). The above-named entities are sometimes referred to in this Agreement each as a “Party” and collectively as the “Parties.”  

R E C I T A L S: 
 Certain
of the Parties have entered into the Related Agreements (as defined below), and in connection therewith, the Parties desire by their execution of this Agreement to evidence their agreement with respect to certain obligations of the Parties, as more
fully set forth herein. 
 In consideration of the premises and the covenants, conditions, and agreements contained herein, and for other
good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows: 

ARTICLE I 

DEFINITIONS; CONSTRUCTION 

Section 1.1 Definitions. As used in this Agreement, the following terms shall have the respective meanings set forth below:
 
 “Acquisition Proposal” is defined in Section 4.2(a). 

“Administrative Personnel” means individuals who are employed by the Westlake Parties or any of their Affiliates and
assist in providing, as part of the Services, any of the administrative services referred to in Schedule II hereto.  

“Affiliate” means (i) with respect to Westlake, any other Person that directly or indirectly through one or more
intermediaries controls, is controlled by Westlake, excluding GP and any other Person that directly or indirectly through one or more intermediaries is controlled by GP; (ii) with respect to the Partnership Entities, any Person that directly or
indirectly through one or more intermediaries is controlled by GP; (iii) with respect to any other Person, any other Person that directly or indirectly through one or more intermediaries controls, is controlled by or is 

  
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under common control with such first Person. As used herein, the term “control” means the possession, directly or indirectly, of the power to direct or cause the direction of the
management and policies of a Person, whether through ownership of Voting Securities, by contract or otherwise. 

“Agreement” is defined in the introduction to this Agreement.  

“Applicable Laws” means all statutes, regulations, rules, ordinances, codes, licenses, permits, orders, approvals and
rules of common law of each Governmental Authority having jurisdiction over the Parties, including Environmental Laws, all health, building, fire, safety and other codes, ordinances and requirements and all applicable standards of the National Board
of Fire Underwriters, in each case, as amended, and any judicial or administrative interpretation thereof, including any judicial or administrative order, consent, decree, judgment or settlement; in each case, as applicable to the Westlake Parties,
the Partnership Entities, the Assets or the Westlake Complexes, as the case may be. 
 “Asset Contribution
Agreement” means that certain Contribution, Conveyance and Assumption Agreement, dated as of the Closing Date, among the Westlake Contributors, GP, the MLP, Operating GP, OpCo and certain other parties, together with the additional
conveyance documents and instruments contemplated or referenced thereunder.  
 “Assets” means all assets
conveyed, contributed, or otherwise transferred by the Westlake Entities to the Partnership Entities prior to or on the Closing Date pursuant to the Asset Contribution Agreement. 

“Business” is defined in Section 3.1. 

“Business Day” means any day other than a Saturday, a Sunday or a holiday on which banking institutions in the State
of Texas are closed.  
 “Change in Law” shall mean the occurrence, after the date of this Agreement, of any
of the following: (a) the adoption or taking into effect of any law, treaty, order, policy, rule or regulation, (b) any change in any law, treaty, order, policy, rule or regulation or in the administration, interpretation or application
thereof by any Governmental Authority or (c) the making or issuance of any request, guideline or directive (whether or not having the force of law) by any Governmental Authority.  

“Closing Date” means the date of the closing of the MLP’s initial public offering of Common Units.  

“Common Units” is defined in the Partnership Agreement.  

“Confidential Information” is defined in Section 7.2.  

“Conflicts Committee” is defined in the Partnership Agreement.  

  
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 “Dedicated Personnel” means individuals, other than Administrative
Personnel, who are employed by the Westlake Parties or any of their Affiliates and provided on a full-time basis to the Partnership Group in connection with provision of the Services. 

“Default Rate” shall mean an interest rate, compounded on a monthly basis, at the rate per annum equal
to the one-month term, London Interbank Offered Rate (LIBOR rate) for U.S. dollar deposits, plus two percentage points per annum, applicable on the first Business Day prior to the due date of payment and thereafter on the first Business Day of each
succeeding month; provided, however, that the Default Rate shall never exceed the maximum rate permitted by applicable Law.  

“Disposition Notice” is defined in Section 4.2(a).  

“dispute” shall have the meaning set out in Section 9.3(a). 

“Environmental Law” means any and all Applicable Laws pertaining to (i) pollution, protection of the environment
(including natural resources), or workplace health and safety, (ii) any Release, threatened Release or exposure of any Person or property to Hazardous Substances, or (iii) the generation, manufacture, processing, distribution, use,
treatment, storage, disposal, transport, arrangement for disposal or transport, or handling of Hazardous Substances. Without limiting the foregoing, Environmental Laws include the Comprehensive Environmental Response, Compensation and Liability Act,
42 U.S.C. § 9601 et seq., the Resource Conservation and Recovery Act, 42 U.S.C. § 6901 et seq.; the Federal Water Pollution Control Act, 33 U.S.C. § 1251 et seq.; the Clean Air Act, 42 U.S.C. § 7401 et seq.; the Hazardous
Materials Transportation Act, 49 U.S.C. § 5101 et seq.; the Toxic Substances Control Act, 15 U.S.C. §§ 2601 et seq.; the Oil Pollution Act, 33 U.S.C. § 2701 et seq.; the Emergency Planning and Community Right-to-Know Act, 42
U.S.C. § 11001 et seq.; the Safe Drinking Water Act, 42 U.S.C. §§ 300f through 300j; the Occupational Safety and Health Act, 29 U.S.C. § 651 et seq.; and all similar Applicable Laws of any Governmental Authority having
jurisdiction over the Assets, the Westlake Complexes or their respective operations, and all amendments to such Applicable Laws and all regulations implementing any of the foregoing.  

“Environmental Liabilities” or “Environmental Liability” shall mean any liabilities, claims or causes
of action (including environmental and Toxic Tort exposure claims or causes of action), demands, losses (including diminution in value suffered by third parties), damages (including real property damages, personal property damages, and natural
resource damages), injuries (including personal injury and death), judgments, settlements, fines, penalties, sanctions, supplemental environmental projects, costs (including costs for Remediation), and expenses (including environmental or Toxic Tort
pre-trial, trial or appellate legal or litigation support work, court costs and reasonable and documented attorneys’, experts’ and consultants’ fees, charges and disbursements) of any and every kind or character, known or unknown,
fixed or contingent.  
 “ERISA” means the Employee Retirement Income Security Act of 1974, as amended. 

  
 3 

 “ERISA Affiliate” means each entity which is or has been treated as a
single employer with the Westlake Parties and their Affiliates for purposes of Section 414 of the Code or Section 4001(a)(14) of ERISA. 

“Ethylene Sales Agreement” means the Ethylene Sales Agreement among OpCo, and certain Affiliates of Westlake dated of
even date herewith, as the same may be amended.  
 “Exchange Act” means the Securities Exchange Act of 1934,
as amended. 
 “Feedstock Supply Agreement” means the Feedstock Supply Agreement between Westlake
Petrochemicals and OpCo dated of even date herewith, as the same may be amended. 
 “First ROFR Acceptance
Deadline” is defined in Section 4.2(a).  
 “Governmental Authority” means any
governmental authority, agency, department, commission, bureau, board, instrumentality, court or quasi-governmental authority of the United States, or any state that has or obtains jurisdiction over the matter in question, or any political
subdivision thereof.  
 “GP” is defined in the introduction to this Agreement.  

“Hazardous Substances” means and includes any substance that, by its nature or its use, is regulated or as to which
liability might arise under any Environmental Law including each substance defined, designated or classified as a hazardous waste, solid waste, hazardous substance, hazardous material, pollutant, contaminant or toxic substance under any
Environmental Law and any petroleum, petroleum products, petroleum hydrocarbons, whether refined or unrefined, crude oil or any fractions or derivatives thereof, asbestos, radioactive materials, urea formaldehyde foam insulation, polychlorinated
biphenyls, and radon gas.  
 “Indemnified Party” means the Partnership Entities or the Westlake Parties and
their Affiliates, as the case may be, in their capacity as the parties entitled to indemnification in accordance with Article II.  

“Indemnifying Party” means either the Partnership Entities or Westlake, as the case may be, in their capacity as the
parties from whom indemnification may be required in accordance with Article II.  
 “Lender”
means any Person providing financing with respect to the Assets.  
 “Limited Partner” is defined in the
Partnership Agreement.  
 “Losses” is defined in Section 2.2(d). 

“MLP” is defined in the introduction to this Agreement.  

“Offer Price” is defined in Section 4.2(a). 

“OpCo” is defined in the introduction to this Agreement.  

  
 4 

 “Operating GP” is defined in the introduction to this Agreement. 

 “Partnership Agreement” means the First Amended and Restated Agreement of Limited Partnership of Westlake
Chemical Partners LP, dated as of the Closing Date, as such agreement is in effect on the Closing Date, to which reference is hereby made for all purposes of this Agreement. No amendment or modification to the Partnership Agreement subsequent to the
Closing Date shall be given effect for the purposes of this Agreement unless consented to by each of the Parties to this Agreement.  

“Partnership Entities” means GP and each member of the Partnership Group; and “Partnership Entity”
means any of the Partnership Entities.  
 “Partnership Group” means the MLP, Operating GP, OpCo and any
Subsidiary of any such Person, treated as a single consolidated entity.  
 “Partnership Group Member” means
any member of the Partnership Group.  
 “Party” and “Parties” are defined in the
introduction to this Agreement.  
 “Person” means an individual or a corporation, limited liability company,
partnership, joint venture, trust, unincorporated organization, association, or Governmental Authority. 
 “Personnel
Costs” means all compensation costs incurred by an employer in connection with the employment by such employer of applicable personnel, including all payroll and benefits.  

“Pre-Closing Environmental Liabilities” means any and all Environmental Liabilities by reason of or arising out of any
acts, omissions or conditions to the extent occurring or existing before the Closing Date associated with the Westlake Complexes or the Assets that constitute or result in (i) a violation of or any non-compliance with or liability under
Environmental Laws in effect before the Closing Date that are applicable to the Westlake Complexes or the Assets, (ii) a Release or threatened Release of, or exposure to, a Hazardous Substance at, under, on or from or to the Westlake Complexes
or the Assets or arising out of operation of the Westlake Complexes or the Assets (including the Release or threatened Release of, or exposure to, Hazardous Substances on, under, or from real properties offsite the Westlake Complexes and Assets
where such Hazardous Substances were transported or disposed, or arranged to be transported or disposed as a result of or in connection with operations at the Westlake Complexes or the Assets) as to which Environmental Laws in effect before the
Closing Date impose liability or require Remediation or (iii) any actual or threatened claims, demands, causes of action, actions or proceedings by or before any Person or Governmental Authority alleging potential liability under any
Environmental Laws in effect before the Closing Date. 
 “Post-Closing Environmental Liabilities” means any
and all Environmental Liabilities by reason of or arising out of any acts, omissions or conditions to the extent occurring or existing on or after the Closing Date associated with the Assets that constitute or result in (i) a violation of or
any non-compliance with or liability under Environmental Laws in effect on or after the Closing Date that are applicable to the Assets, (ii) a Release or threatened Release of, or exposure to, a Hazardous Substance at, under, on or from or to
the Assets, or arising out of  

  
 5 

 
operation of the Assets (including the Release or threatened Release of, or exposure to, Hazardous Substances on, under, or from real properties offsite the Assets where such Hazardous Substances
were transported or disposed, or arranged to be transported or disposed as a result of or in connection with operations at the Assets) as to which Environmental Laws in effect on or after the Closing Date impose liability or require Remediation or
(iii) any actual or threatened claims, demands, causes of action, actions or proceedings by or before any Person or Governmental Authority alleging potential liability under any Environmental Laws in effect on or after the Closing Date. 

“Proposed Transferee” is defined in Section 4.2(a).  

“Recipient” is defined in Section 7.1. 

“Related Agreements” means the Ethylene Sales Agreement, the Feedstock Supply Agreement, the Services Agreement and
the Site Lease Agreements.  
 “Release” any releasing, depositing, spilling, leaking, pumping, pouring,
placing, emitting, discarding, abandoning, emptying, discharging, migrating, injecting, escaping, leaching, dumping, or disposing.  

“Remediation” shall mean any investigation, study, assessment, evaluation, sampling, testing, monitoring, containment,
removal or removal action, disposal, closure, corrective action, remediation or remedial action (regardless of whether active or passive), natural attenuation, restoration, bioremediation, response, repair, corrective measure, cleanup, or abatement
that is required under any Environmental Law. 
 “Retained Assets” means the facilities owned by any of the
Westlake Entities that were not conveyed, contributed or otherwise transferred to the Partnership Group pursuant to the Asset Contribution Agreement. 

“ROFR Acceptance Deadline” means the First ROFR Acceptance Deadline or the Second ROFR Acceptance Deadline, as
applicable.  
 “Sale Assets” is defined in Section 4.2(a). 

“Second ROFR Acceptance Deadline” is defined in Section 4.2(a). 

“Seller” is defined in Section 4.2(a). 

“Services” is defined in Section 3.1. 

“Services Agreement” means the Services Agreement among OpCo and certain Affiliates of Westlake dated of even date
herewith, as the same may be amended. 
 “Share-Based Compensation” means any compensation accruing or
payable under any incentive or other compensation plan or program of an employer based upon changes in the equity value of such employer or any of its Affiliates (but excluding the MLP and its subsidiaries). 

  
 6 

 “Shared Personnel” means individuals, other than Administrative
Personnel, who are employed by the Westlake Parties or any of their Affiliates and provided on a part-time basis to the Partnership Group in connection with provision of the Services. 

“Site Lease Agreements” means the Site Lease Agreements between OpCo and certain Affiliates of Westlake dated of even
date herewith, as the same may be amended.  
 “Subsidiary” means, with respect to any Person, (a) a
corporation of which more than 50% of the voting power of shares entitled (without regard to the occurrence of any contingency) to vote in the election of directors or other governing body of such corporation is owned, directly or indirectly, at the
date of determination, by such Person, by one or more Subsidiaries of such Person or a combination thereof, (b) a partnership (whether general or limited) in which such Person or a Subsidiary of such Person is, at the date of determination, a
general partner of such partnership, but only if such Person, directly or by one or more Subsidiaries of such Person, or a combination thereof, controls such partnership on the date of determination or (c) any other Person in which such Person,
one or more Subsidiaries of such Person, or a combination thereof, directly or indirectly, at the date of determination, has (i) a majority ownership interest or (ii) the power to elect or direct the election of a majority of the directors
or other governing body of such Person.  
 “Toxic Tort” means a claim or cause of action alleging personal
injury or property damage incurred by the plaintiff that is alleged to have been caused by exposure to, or contamination by, Hazardous Substances that have been released into the environment by or as a result of the actions or omissions of the
defendant.  
 “Transfer” including the correlative terms “Transferring” or
“Transferred” means any direct or indirect transfer, assignment, sale, gift, pledge, hypothecation or other encumbrance, or any other disposition (whether voluntary, involuntary or by operation of law).  

“Units” is defined in the Partnership Agreement.  

“Voting Securities” means securities of any class of a Person entitling the holders thereof to vote on a regular basis
in the election of members of the board of directors or other governing body of such Person. 
 “Westlake”
means Westlake Chemical Corporation, a Delaware corporation.  
 “Westlake Entities” means any Person
controlled, directly or indirectly, by Westlake other than the Partnership Entities; and “Westlake Entity” means any of the Westlake Entities.  

“Westlake Complexes” means the petrochemical production facilities owned by Westlake and located in Calvert City,
Kentucky and Lake Charles, Louisiana, as more particularly described on Schedule I to this Agreement, but excluding the Assets. 

“Westlake Complex Parties” is defined in the introduction to this Agreement. 

“Westlake Contributors” is defined in the introduction to this Agreement.  

  
 7 

 “Westlake Parties” means any Westlake Entity party to this Agreement.

 “Westlake Post-Closing Environmental Liabilities” means any and all Environmental Liabilities by reason of or
arising out of any acts, omissions or conditions to the extent occurring or existing on or after the Closing Date associated with the Westlake Complexes that constitute or result in (i) a violation of or any non-compliance with or liability
under Environmental Laws in effect on or after the Closing Date that are applicable to the Westlake Complexes, (ii) a Release or threatened Release of, or exposure to, a Hazardous Substance at, under, on or from or to the Westlake Complexes, or
arising out of operation of the Westlake Complexes (including the Release or threatened Release of, or exposure to, Hazardous Substances on, under, or from real properties offsite the Westlake Complexes where such Hazardous Substances were
transported or disposed, or arranged to be transported or disposed as a result of or in connection with operations at the Westlake Complexes) as to which Environmental Laws in effect on or after the Closing Date impose liability or require
Remediation or (iii) any actual or threatened claims, demands, causes of action, actions or proceedings by or before any Person or Governmental Authority alleging potential liability under any Environmental Laws in effect on or after the
Closing Date. 
 Section 1.2 Construction. In construing this Agreement, the following principles shall be
followed: (i) no consideration shall be given to the captions of articles, sections or subsections; (ii) no consideration shall be given to the fact or presumption that one Party had a greater or lesser hand in drafting this Agreement;
(iii) the word “includes” and its syntactic variants means “includes, but is not limited to” and corresponding syntactic variant expressions; and (iv) the plural shall be deemed to include the singular,
and vice versa.  
 ARTICLE II 

INDEMNIFICATION 

Section 2.1 Environmental Indemnification. 

(a) The Westlake Contributors agree to indemnify, defend and hold harmless the Partnership Entities and their respective officers, directors
and employees from and against any and all Pre-Closing Environmental Liabilities, incurred by or asserted against Partnership Entities; provided that the Partnership Entities shall use commercially reasonable efforts to mitigate any such cost, but
failure to use such commercially reasonable efforts shall not limit the Partnership Entities’ rights to indemnification hereunder, except to the extent the Westlake Contributors are prejudiced thereby. 

(b) So long as any Related Agreement remains in effect, the Partnership Entities agree to indemnify, defend and hold harmless the Westlake
Contributors and their Affiliates, and their respective officers, directors and employees, from and against any and all Post-Closing Environmental Liabilities, incurred by or asserted against the Westlake Contributors or any of their Affiliates;
provided that the Westlake Contributors shall use commercially reasonable efforts to mitigate any such cost, but failure to use such commercially reasonable efforts shall not limit the Westlake Contributors’ rights to indemnification hereunder,
except to the extent the Partnership Entities are prejudiced thereby. 

  
 8 

 (c) So long as any Related Agreement remains in effect, the Westlake Complex Parties agree to
indemnify, defend and hold harmless the Partnership Entities, and their respective officers, directors and employees, from and against any and all Westlake Post-Closing Environmental Liabilities, incurred by or asserted against the Partnership
Entities; provided that the Partnership Entities shall use commercially reasonable efforts to mitigate any such cost, but failure to use such commercially reasonable efforts shall not limit the Partnership Entities’ rights to indemnification
hereunder, except to the extent the Westlake Complex Parties are prejudiced thereby. 
 (d) So long as any Related Agreement remains in
effect, the Partnership Entities agree to indemnify, defend and hold harmless the Westlake Complex Parties, and their respective officers, directors and employees, from and against any and all Environmental Liabilities (other than Pre-Closing
Environmental Liabilities or Westlake Post-Closing Environmental Liabilities), incurred by or asserted against the Westlake Complex Parties; provided that the Westlake Complex Parties shall use commercially reasonable efforts to mitigate any such
cost, but failure to use such commercially reasonable efforts shall not limit the Westlake Complex Parties’ rights to indemnification hereunder, except to the extent the Partnership Entities are prejudiced thereby. 

Section 2.2 Additional Indemnification. 

(a) The Westlake Parties shall indemnify, defend, and hold harmless the Partnership Entities from and against any losses, damages,
liabilities, claims, demands, causes of action, judgments, settlements, fines, penalties, and reasonable costs and expenses (including court costs and reasonable attorneys’ and experts’ fees) of any and every kind or character, known or
unknown, fixed or contingent, suffered or incurred by the Partnership Entities by reason of or arising out of claims asserted by any third party with respect to (i) events and conditions associated with the ownership or operation of the Assets
and occurring before the Closing Date (other than those losses for which the Partnership Entities are entitled to indemnification from the Westlake Contributors under Section 2.1) to the extent that the Westlake Entities are notified in
writing of any of the foregoing within one year after the Closing Date, (ii) all currently pending legal actions or those threatened in writing against the Westlake Parties, (iii) events and conditions associated with the Retained Assets
whether occurring before or after the Closing Date, and (iv) all federal, state and local income tax liabilities attributable to the operation of the Assets prior to the Closing Date, including any such income tax liabilities of the Westlake
Entities that may result from the consummation of the formation transactions for the Partnership Entities. 
 (b) The Partnership Entities
shall indemnify, defend, and hold harmless the Westlake Entities and their Affiliates from and against any losses, damages, liabilities, claims, demands, causes of action, judgments, settlements, fines, penalties and reasonable costs and expenses
(including court costs and reasonable attorney’s and expert’s fees) of any and every kind or character, known or unknown, fixed or contingent, suffered or incurred by the Westlake Entities or their Affiliates by reason of or arising out of
claims asserted by any third party with respect to events and conditions associated with the operation of the Assets and occurring on or after the Closing Date (other than those losses for which the Partnership Entities are entitled to
indemnification from the Westlake Contributors under Section 2.1(a) or Section 2.2(a)). 

  
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 (c) The Westlake Parties shall indemnify, defend, and hold harmless the Partnership Entities from
and against any losses, damages, liabilities, claims, demands, causes of action, judgments, settlements, fines, penalties, and reasonable costs and expenses (including court costs and reasonable attorneys’ and experts’ fees) of any and
every kind or character, known or unknown, fixed or contingent, suffered or incurred by the Partnership Entities by reason of or arising out of any employee benefit plan sponsored or contributed to by the Westlake Parties or their ERISA Affiliates
(other than the Partnership Entities and any other Person that directly or indirectly through one or more intermediaries is controlled by a Partnership Entity), including, but not limited to, any liability of the Westlake Parties and such ERISA
Affiliates under Title IV of ERISA and any claims by current or former employees of such entities for post-retirement medical benefits, but excluding any such loss, damage, liability, claim, demand, cause of action, judgment, settlement, fine,
penalty or cost and expense that is reimbursable by a Partnership Entity to the Westlake Parties under the Services Agreement. Notwithstanding the foregoing, the indemnity provided in the preceding sentence shall cease to apply with respect to a
Partnership Entity on the date such Partnership Entity ceases to be an ERISA Affiliate except with respect to any matter covered by such indemnity that arose prior to such date. 

(d) The Partnership Entities shall indemnify, reimburse, defend and hold harmless the Westlake Parties and their Affiliates and their
respective successors and permitted assigns, together with their respective employees, officers, members, managers, directors, agents and representatives, from and against all losses, costs, damages, injuries, taxes, penalties, interests, expenses,
obligations, claims and liabilities (joint or severable) of any kind or nature whatsoever (collectively “Losses”) that are incurred by such Indemnified Parties in connection with, relating to or arising out of
(i) the breach by such Partnership Entity of any term or condition of this Agreement, or (ii) the performance of any Services hereunder; provided, however, that the Partnership Entities shall not be obligated to indemnify,
reimburse, defend or hold harmless any Indemnified Party for any Losses incurred, by such Indemnified Party in connection with, relating to or arising out of (i) a breach by such Indemnified Party of this Agreement, (ii) the gross
negligence, willful misconduct, bad faith or reckless disregard of such Indemnified Party with respect to the Services hereunder or (iii) fraudulent or dishonest acts of such Indemnified Party. 

(e) The Westlake Parties shall indemnify, reimburse, defend and hold harmless the Partnership Entities and their Affiliates and their
respective successors and permitted assigns, together with their respective employees, officers, members, managers, directors, agents and representatives, from and against all losses, costs, damages, injuries, taxes, penalties, interests, expenses,
obligations, claims and liabilities (joint or severable) of any kind or nature whatsoever (collectively “Losses”) that are incurred by such Indemnified Parties in connection with, relating to or arising out of
(i) the breach by such Westlake Party of any term or condition of this Agreement, or (ii) the performance of any Services hereunder; provided, however, that the Westlake Parties shall not be obligated to indemnify, reimburse,
defend or hold harmless any Indemnified Party for any Losses incurred, by such Indemnified Party in connection with, relating to or arising out of (i) a breach by such Indemnified Party of this Agreement, (ii) the gross negligence, willful
misconduct, bad faith or reckless disregard of such Indemnified Party with respect to the Services hereunder or (iii) fraudulent or dishonest acts of such Indemnified Party. 

  
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 Section 2.3 Consequential Damages. NOTWITHSTANDING ANY PROVISION OF THIS
AGREEMENT, IN NO EVENT SHALL ANY PARTY BE LIABLE TO ANY OTHER PARTY OR INDEMNIFIED PARTY WITH RESPECT TO ANY CLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT FOR ANY LOST OR PROSPECTIVE PROFITS OR ANY OTHER SPECIAL, CONSEQUENTIAL,
INCIDENTAL, OR INDIRECT LOSSES OR DAMAGES FROM ITS PERFORMANCE UNDER THIS AGREEMENT OR FOR ANY FAILURE OR PERFORMANCE HEREUNDER OR RELATED HERETO, WHETHER ARISING OUT OF BREACH OF CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY, OR OTHERWISE,
EXCEPT FOR ANY SUCH DAMAGES RECOVERED BY ANY THIRD PARTY AGAINST ANY PARTY IN RESPECT OF WHICH SUCH PARTY WOULD OTHERWISE BE ENTITLED TO INDEMNIFICATION PURSUANT TO THIS ARTICLE II, PROVIDED THAT NO PARTY SHALL BE ENTITLED TO INDEMNIFICATION FOR ANY
DAMAGES THAT ARE CONTRARY TO APPLICABLE LAW. 
 Section 2.4 Indemnification Procedures. 

(a) The Indemnified Party agrees that promptly after it becomes aware of facts giving rise to a claim for indemnification under this
Article II, it will provide notice thereof in writing to the Indemnifying Party, specifying the nature of and specific basis for such claim. The Indemnified Party shall also provide supporting information indicating the facts and
circumstances relating to the claim, copies of all correspondence with third parties, Governmental Authorities or other individuals relating to the claim, and other relevant information reasonably requested by the Indemnifying Party. 

(b) The Indemnifying Party shall have the right to control all aspects of the response to or defense of (and any counterclaims with respect
to) any claims brought against the Indemnified Party that are covered by the indemnification under this Article II, including correspondence and negotiation with Governmental Authorities, the selection of counsel and other consultants,
determination of the scope of and approach to any investigation or remediation, determination of whether to appeal any decision of any court, determination of whether to enter into any voluntary agreement with any Governmental Authority, and the
settling of any such matter or any issues relating thereto; provided, however, that no such settlement shall be entered into without the consent of the Indemnified Party (with the concurrence of the Conflicts Committee in the case of the Partnership
Entities) unless it includes a full release of the Indemnified Party from such matter or issues, as the case may be. 
 (c) The Indemnified
Party agrees to cooperate fully with the Indemnifying Party, with respect to all aspects of the defense of any claims covered by the indemnification under this Article II, including the prompt furnishing to the Indemnifying Party of any
correspondence or other notice relating thereto that the Indemnified Party may receive, permitting the name of the Indemnified Party to be utilized in connection with such defense, the making available to the Indemnifying Party of any files, records
or other information of the Indemnified Party that the Indemnifying Party considers relevant to such defense and the making available to the Indemnifying Party of any employees of the Indemnified Party; provided, however, that in connection
therewith the Indemnifying Party agrees to use reasonable efforts to minimize the impact thereof on the operations of the Indemnified Party and further agrees to maintain the confidentiality of all files, records, and other information furnished by
the 

  
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Indemnified Party pursuant to this Section 2.4. In no event shall the obligation of the Indemnified Party to cooperate with the Indemnifying Party as set forth in the immediately
preceding sentence be construed as imposing upon the Indemnified Party an obligation to hire and pay for counsel in connection with the defense of any claims covered by the indemnification set forth in this Article II; provided, however,
that the Indemnified Party may, at its own option, cost and expense, hire and pay for counsel in connection with any such defense. The Indemnifying Party agrees to keep any such counsel hired by the Indemnified Party informed as to the status of any
such defense, but the Indemnifying Party shall have the right to retain sole control over such defense. 
 (d) In determining the amount of
any loss, cost, damage or expense for which the Indemnified Party is entitled to indemnification under this Agreement, the gross amount of the indemnification will be reduced by (i) any insurance proceeds realized by the Indemnified Party, and
such correlative insurance benefit shall be net of any incremental insurance premiums that become due and payable by the Indemnified Party as a result of such claim and (ii) all amounts recovered by the Indemnified Party under contractual
indemnities from third Persons. 
 ARTICLE III 

SERVICES 

Section 3.1 Scope of Services. The Westlake Parties agree to provide, and agree to cause their respective Affiliates to
provide, on behalf of the GP for the Partnership Entities’ benefit, the selling, general and administrative services necessary to run the business of the Partnership Entities (the “Business”), which services may include,
without limitation, those services set forth in Schedule II to this Agreement (collectively, the “Services”). 

Section 3.2 Exclusion of Services. At any time, either GP or the Westlake Parties may temporarily or permanently exclude
any particular service from the scope of Services upon 180 days’ notice. 
 Section 3.3 Performance of Services by
Affiliates or Other Persons. The Parties hereby agree that in discharging its obligations hereunder, the Westlake Parties may engage any of their Affiliates or other Persons to perform the Services (or any part of the Services) on their behalf
and that the performance of the Services (or any part of the Services) by any such Affiliate or Person shall be treated as if the Westlake Parties performed such Services. No such delegation by the Westlake Parties to Affiliates or other Persons
shall relieve the Westlake Parties of their obligations hereunder. 
 Section 3.4 Payment Amount. GP shall pay, or cause
to be paid, to the Westlake Parties the amount of any direct or indirect expenses incurred by the Westlake Parties or their Affiliates in connection with the provision of Services by the Westlake Parties or their Affiliates (the “Payment
Amount”), in accordance with the following: 
 (a) Dedicated Personnel. The Payment Amount will include all Personnel Costs
of Dedicated Personnel as determined by the Westlake Parties on a commercially reasonable basis. 

  
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 (b) Shared Personnel and Administrative Personnel. The Payment Amount will include a pro
rata share of all Personnel Costs of Shared Personnel and Administrative Personnel, as determined by the Westlake Parties on a commercially reasonable basis. 

(c) Administrative Costs. The Payment Amount will include following: 

(i) Office Costs. A pro rata share of all office costs (including, without limitation, all costs relating to office
leases, equipment leases, supplies, property taxes and utilities) for all locations of Administrative Personnel, as determined by the Westlake Parties on a commercially reasonable basis, based on the allocation methodology determined by the Westlake
Parties, as reasonably acceptable to the Partnership Group and in accordance with United States generally accepted accounting principles; 

(ii) Insurance. Insurance premiums will be direct charged to the applicable insured to the extent possible, and
otherwise will be allocated on a commercially reasonable basis determined by the Westlake Parties, based on the allocation methodology determined by the Westlake Parties, as reasonably acceptable to the Partnership Group and in accordance with
United States generally accepted accounting principles; 
 (iii) Outside Services. Services provided by outside
vendors (including audit services, legal services and other services) will first be direct charged where applicable; provided, however that the Payment Amount will include a pro rata share of charges for all services that are provided by outside
vendors and not direct charged, as determined by the Westlake Parties on a commercially reasonable basis, based on the allocation methodology determined by the Westlake Parties, as reasonably acceptable to the Partnership Group and in accordance
with United States generally accepted accounting principles; 
 (iv) Other SGA Costs. A pro rata share of all other
sales, general and administrative costs relating to the Partnership Entities, as determined by the Westlake Parties on a commercially reasonable basis, based on the allocation methodology determined by the Westlake Parties, as reasonably acceptable
to the Partnership Group and in accordance with United States generally accepted accounting principles; and 
 (v)
Depreciation and Amortization. A pro rata share of depreciation and amortization relating to all locations of Administrative Personnel, as determined by the Westlake Parties on a commercially reasonable basis, following recognition of such
depreciation or amortization as an expense on the books and records of the Westlake Parties or their Affiliates. 
 (d) Other Costs.
Bank charges, interest expense and any other costs as reasonably incurred by the Westlake Parties or their Affiliates in the provision of Services will be direct charged to the Partnership Entities. For the avoidance of doubt, any of the foregoing
costs and expenses described in Section 3.4 that are direct charged to any Party will not be included in the Payment Amount. 

  
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 Section 3.5 Payment of the Payment Amount. The Westlake Parties shall submit
monthly invoices to GP for the Services on or before the 20th day of each month, which invoices shall be due and payable not later than the 5th
day following receipt of such invoice. If the due date for payment is not a Business Day, then the due date for payment shall be the immediately succeeding Business Day. GP shall pay, or cause the Partnership Group to pay, to the Westlake Parties in
immediately available funds, the full Payment Amount due under Section 3.4. Past due amounts shall bear interest at the Default Rate. If GP fails to make payment of any amount of any monthly invoice, other than any amount thereof that is
disputed in accordance with Section 3.6 below, on or before the later of (a) the 60th Day after such payment is due and (b) the 30th Day after notice by the Westlake Parties of such non-payment, the Westlake Parties shall have the
right to suspend the provision of the Services hereunder until such payment is made. 
 Section 3.6 Disputed Charges. GP
MAY, WITHIN 90 DAYS AFTER RECEIPT OF A CHARGE FROM THE WESTLAKE PARTIES, TAKE WRITTEN EXCEPTION TO SUCH CHARGE, ON THE GROUND THAT THE SAME WAS NOT A REASONABLE COST INCURRED BY THE WESTLAKE PARTIES OR THEIR AFFILIATES IN CONNECTION WITH THE
SERVICES. GP SHALL NEVERTHELESS PAY OR CAUSE THE PARTNERSHIP ENTITIES TO PAY IN FULL WHEN DUE THE FULL PAYMENT AMOUNT OWED TO THE WESTLAKE PARTIES. SUCH PAYMENT SHALL NOT BE DEEMED A WAIVER OF THE RIGHT OF A PARTNERSHIP ENTITY TO RECOUP ANY
CONTESTED PORTION OF ANY AMOUNT SO PAID. HOWEVER, IF THE AMOUNT AS TO WHICH SUCH WRITTEN EXCEPTION IS TAKEN, OR ANY PART THEREOF, IS ULTIMATELY DETERMINED NOT TO BE A REASONABLE COST INCURRED BY THE WESTLAKE PARTIES OR THEIR AFFILIATES IN CONNECTION
WITH THEIR PROVISION OF THE SERVICES HEREUNDER, SUCH AMOUNT OR PORTION THEREOF (AS THE CASE MAY BE) SHALL BE REFUNDED BY THE WESTLAKE PARTIES TO THE PARTNERSHIP ENTITIES TOGETHER WITH INTEREST THEREON AT THE DEFAULT RATE FOR THE PERIOD FROM THE DATE
OF PAYMENT BY THE PARTNERSHIP ENTITIES TO THE DATE OF REFUND BY THE WESTLAKE PARTIES. 
 Section 3.7 Employees. The
Partnership Entities shall not be obligated to pay directly to Dedicated Personnel or Shared Personnel any compensation, salaries, wages, bonuses, benefits, social security taxes, workers’ compensation insurance, retirement and insurance
benefits, training or other expenses. 
 Section 3.8 Limitation of Duties and Liability. The relationship of the
Westlake Parties to the Partnership Entities pursuant to this Article III is as an independent contractor and nothing in this Agreement shall be construed to impose on the Westlake Parties, or on any of their Affiliates, or on any of
their respective successors and permitted assigns, or on their respective employees, officers, members, managers, directors, agents and representatives, any express or implied fiduciary duty. The Westlake Parties and their Affiliates and their
respective successors and permitted assigns, together with their respective employees, officers, members, managers, directors, agents and representatives, shall not be liable for, and the Partnership Entities shall not take, or permit to be taken,
any action against any of such Persons to hold such Persons liable for (a) any error of judgment or mistake of law by such Persons or for any Loss suffered by such Persons in connection with the performance of any Services under this Agreement,
except for a liability or loss resulting from gross negligence, willful misconduct, bad 

  
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faith or reckless disregard in the performance by such Persons of the Services, or (b) any fraudulent or dishonest acts by the Partnership Entities. In no event, whether based on contract,
indemnity, warranty, tort (including negligence), strict liability or otherwise, shall the Westlake Parties or their Affiliates, their respective successors and permitted assigns, or their respective employees, officers, members, managers,
directors, agents and representatives, be liable for loss of profits or revenue or special, incidental, exemplary, punitive or consequential damages. 

ARTICLE IV 
 RIGHT
OF FIRST REFUSAL 
 Section 4.1 Westlake Right of First Refusal. 

(a) The Partnership Entities hereby grant to Westlake a right of first refusal on any proposed Transfer (other than a grant of a security
interest to a bona fide third-party Lender or a Transfer to another Partnership Entity; provided that such Partnership Entity shall remain bound by this Section 4.1) of (i) equity interests in OpCo or (ii) both the Assets that
serve the Westlake Entities’ other facilities and any other assets that the Partnership Group may acquire from the Westlake Entities, excluding sales or other dispositions of inventory, accounts receivable, spare parts and other assets in the
ordinary course of business, and sales or other dispositions of assets as part of normal retirements or replacements. The Parties acknowledge and agree that nothing in this Section 4.1 shall prevent or restrict the Transfer of the
capital stock of, equity ownership interests or other securities in the GP or the MLP. 
 (b) The Parties acknowledge that all potential
Transfers of Assets pursuant to this Section 4.1 are subject to obtaining any and all required written consents of Governmental Authorities. 

(c) Westlake shall have the right, in its sole discretion, to assign its rights under this Section 4.1 to any Affiliate of
Westlake. 
 Section 4.2 Procedures.  

(a) If a Partnership Entity proposes to Transfer either the equity interests in OpCo or any of the Assets with respect to which a right
of first refusal has been granted pursuant to this Article IV to any Person pursuant to a bona fide third-party offer (an “Acquisition Proposal”), then the Partnership Entity bound by such right of first refusal
(“Seller”) shall promptly give written notice (a “Disposition Notice”) thereof to Westlake. The Disposition Notice shall set forth the following information in respect of the proposed Transfer: the name and address
of the prospective acquiror (the “Proposed Transferee”), the assets subject to the Acquisition Proposal (the “Sale Assets”), the purchase price offered by such Proposed Transferee (the “Offer
Price”), reasonable detail concerning any non-cash portion of the proposed consideration, if any, to allow Westlake to reasonably determine the fair market value of such non-cash consideration, Seller’s estimate of the fair market
value of any non-cash consideration and all other material terms and conditions of the Acquisition Proposal that are then known to Seller. To the extent the Proposed Transferee’s offer consists of consideration other than cash (or in addition
to cash) the Offer Price shall be deemed equal to the amount of any such cash plus the fair market value of such non-cash consideration. In the event Seller and  

  
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Westlake agree as to the fair market value of any non-cash consideration, Westlake will provide written notice of its decision regarding the exercise of its right of first refusal to purchase the
Sale Assets within 30 days of its receipt of the Disposition Notice (the “First ROFR Acceptance Deadline”). Failure to provide such notice within such 30-day period shall be deemed to constitute a decision not to purchase the Sale
Assets. In the event (i) Westlake’s determination of the fair market value of any non-cash consideration described in the Disposition Notice (to be determined by Westlake within 30 days of receipt of such Disposition Notice) is less than
the fair market value of such consideration as determined by Seller in the Disposition Notice and (ii) Westlake and Seller are unable to mutually agree upon the fair market value of such non-cash consideration within 30 days after Westlake
notifies Seller of its determination thereof, Seller and Westlake shall engage a mutually agreed upon valuation firm to determine the fair market value of the non-cash consideration. Such valuation firm shall be instructed to notify Westlake and
Seller of its decision within 30 days after all material information is submitted thereto, which decision shall be final. The fees of the valuation firm will be split equally between Seller and Westlake. Westlake will provide written notice of its
decision regarding the exercise of its right of first refusal to purchase the Sale Assets to Seller within 30 days after the valuation firm has submitted its determination (the “Second ROFR Acceptance Deadline”). Failure to
provide such notice within such 30-day period shall be deemed to constitute a decision by Westlake not to purchase the Sale Assets. If Westlake fails to exercise a right during any applicable period set forth in this
Section 4.2(a), Westlake shall be deemed to have waived its rights with respect to such proposed disposition of the Sale Assets, but not with respect to any future offer of assets. 

(b) If Westlake chooses to exercise its right of first refusal to purchase the Sale Assets under Section 4.2(a), Westlake and
Seller shall enter into a purchase and sale agreement for the Sale Assets, which shall include the following terms: 
 (i)
Westlake will agree to deliver cash for the Offer Price (unless Westlake and Seller agree that consideration will be paid by means of non-cash consideration); 

(ii) Seller will represent that it has good and indefeasible title to the Sale Assets, subject to all recorded matters and all
physical conditions in existence on the closing date for the purchase of the Sale Assets, plus any other such matters as Westlake may approve, which approval will not be unreasonably withheld. If Westlake desires to obtain any title insurance with
respect to the Sale Assets, the full cost and expense of obtaining the same (including the cost of title examination, document duplication and policy premium) shall be borne by Westlake; 

(iii) Seller will grant to Westlake the right, exercisable at Westlake’s risk and expense, to make such surveys, tests and
inspections of the Sale Assets as Westlake may deem desirable, so long as such surveys, tests or inspections do not damage the Sale Assets or interfere with the activities of Seller and its Affiliates thereon and so long as Westlake has furnished
Seller with evidence that adequate liability insurance is in full force and effect; 

  
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 (iv) Westlake will have the right to terminate its obligation to purchase the
Sale Assets under this Article IV if the results of any searches, surveys, tests or inspections conducted pursuant to Section 4.2(b)(ii) or (iii) above are, in the reasonable opinion of Westlake, unsatisfactory;

 (v) the closing date for the purchase of the Sale Assets shall occur no later than 120 days following receipt by Seller of
written notice by Westlake of its intention to exercise its option to purchase the Sale Assets pursuant to Section 4.2(a); 

(vi) Seller shall execute, have acknowledged and deliver to Westlake a special warranty deed, assignment of easement, or
comparable document, as appropriate, in the applicable jurisdiction, on the closing date for the purchase of the Sale Assets constituting real property interests, conveying the Sale Assets to Westlake free and clear of all encumbrances created by
Seller and its Affiliates other than those set forth in Section 4.2(b)(ii) above; 
 (vii) the sale of any Sale
Assets shall be made on substantially the same terms and conditions as the Acquisition Proposal, unless otherwise agreed by Seller and Westlake or otherwise provided herein; and 

(viii) neither Seller nor Westlake shall have any obligation to sell or buy the Sale Assets if any of the material consents
referred to in Section 4.1(c) have not been obtained. 
 (c) Seller and Westlake shall cooperate in good faith in obtaining all
necessary governmental and other third Person approvals, waivers and consents required for the closing. Any such closing shall be delayed, to the extent required, until the third Business Day following the expiration of any required waiting periods
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended. 
 (d) If the Transfer to the Proposed Transferee is not
consummated in accordance with the terms of the Acquisition Proposal within the later of (A) 180 days after the later of the applicable ROFR Acceptance Deadline, and (B) 10 days after the satisfaction of all governmental approval or filing
requirements, if any, the Acquisition Proposal shall be deemed to lapse, and Seller may not Transfer any of the Sale Assets described in the Disposition Notice without complying again with the provisions of this Article IV. 

ARTICLE V 

REPRESENTATIONS AND WARRANTIES 

Section 5.1 Representations by the Westlake Parties. Each of the Westlake Parties represents and warrants to the
Partnership Entities that: 
 (a) Such Westlake Party is duly organized, validly existing and in good standing under the laws of the State
of Delaware, and has all requisite power and authority to own and lease the properties and assets it currently owns and leases, including the Retained Assets, and to conduct its activities as such activities are currently conducted and as
contemplated by this Agreement. 

  
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 (b) Such Westlake Party has all requisite power, authority and capacity to execute, deliver and
perform this Agreement and to consummate the transactions contemplated hereby. The execution, delivery and performance of this Agreement and the consummation of the transactions contemplated hereby by such Westlake Party have been duly and validly
authorized by all necessary action on the part of such Westlake Party, and this Agreement has been duly and validly executed and delivered by such Westlake Party, and is the valid and binding obligation of such Westlake Party, enforceable against
such Westlake Party in accordance with its terms, subject to applicable laws of bankruptcy, insolvency and similar laws affecting creditors’ rights and remedies generally. 

(c) The execution, delivery and performance by such Westlake Party of this Agreement does not and will not (i) conflict with or violate
any provision of such Westlake Party’s organizational documents; (ii) violate any provision of any Applicable Laws; (iii) conflict with, violate, result in a breach of, constitute a default under (without regard to requirements of
notice, lapse of time, or elections of other Persons, or any combination thereof) or accelerate or permit the acceleration of the performance required by, any contracts or other instruments to which such Westlake Party is a party or by which either
such Westlake Party or the Retained Assets is bound or affected which would cause a material adverse impact on the Partnership Entities; or (iv) require any consent, approval, or authorization of, or filing of any certificate, notice,
application, report, or other document with, any Governmental Authority or other Person that has not been obtained or the failure to obtain which would cause a material adverse impact on the Partnership Entities. 

Section 5.2 Representations by Partnership Entities. Each of the Partnership Entities represents and warrants to the
Westlake Parties that: 
 (a) Such Partnership Entity is duly organized, validly existing and in good standing under the laws of the state
of its organization, and, as of the Closing Date, has all requisite power and authority to own and lease the properties and assets it currently owns and leases, including the Assets, and to conduct its activities as such activities are currently
conducted and as contemplated by this Agreement. 
 (b) Such Partnership Entity has all requisite power, authority and capacity to execute,
deliver and perform this Agreement and to consummate the transactions contemplated hereby. The execution, delivery and performance of this Agreement and the consummation of the transactions contemplated hereby by such Partnership Entity have been
duly and validly authorized by all necessary action on the part of such Partnership Entity, and this Agreement has been duly and validly executed and delivered by such Partnership Entity, and is the valid and binding obligation of such Partnership
Entity, enforceable against such Partnership Entity in accordance with its terms, subject to applicable laws of bankruptcy, insolvency and similar laws affecting creditors’ rights and remedies generally. 

(c) The execution, delivery and performance by such Partnership Entity of this Agreement do not and will not (i) conflict with or violate
any provision of such Partnership Entity’s organizational documents; (ii) violate any provision of any Applicable Laws; (iii) conflict with, violate, result in a breach of, constitute a default under (without regard to requirements of
notice, lapse of time, or elections of other Persons, or any combination thereof) 

  
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or accelerate or permit the acceleration of the performance required by, any contracts or other instruments to which such Partnership Entity is a party or by which either such Partnership Entity
or its Assets are bound or affected, which would cause a material adverse impact on the Westlake Entities; or (iv) require any consent, approval, or authorization of, or filing of any certificate, notice, application, report, or other document
with, any Governmental Authority or other Person that has not been obtained or the failure to obtain which would cause a material adverse impact on the Westlake Entities. 

ARTICLE VI 
 INSURANCE

 Section 6.1 Westlake Insurance. 

(a) Subject to the GP’s reasonable approval and the last sentence of this Section 6.1(a), the Westlake Entities shall obtain
and maintain the insurance described in Section 6.1(b) during any period in which one or more of the Related Agreements is in effect. The Westlake Entities shall procure and maintain such insurance under individual or blanket policies
and include the Partnership Entities as additional insureds under all liability policies except for workers compensation insurance. If at any time the insurer (or prospective insurer) under the property insurance referenced in
Section 6.1(b)(vi) will not permit the Partnership Entities to remain named insureds under such policy, then the Westlake Entities shall notify the MLP thereof as soon as reasonably practicable (but in any event no later than 30 days
prior to the date that the Partnership Entities cease to be named insureds) and the MLP shall be responsible for obtaining and maintaining the property insurance described in such Section 6.1(b)(vi) covering the Partnership
Entities’ real and personal property and time element loss caused by direct damage to covered property. 
 (b) The minimum insurance to
be obtained and maintained by the Westlake Entities is set forth below: 
 (i) Statutory Workers Compensation Insurance in
compliance with Applicable Law covering all employees at the Westlake Complexes; 
 (ii) Employer’s Liability Insurance,
in a minimum amount per accident determined by the Westlake Parties on a commercially reasonable basis; 
 (iii) Commercial
General Liability Insurance, covering bodily injury and property damage to third parties and covering liability for damage to property of third parties. Such policy or combination of policies shall provide per occurrence and annual aggregate limits
determined by the Westlake Parties on a commercially reasonable basis and shall include contractual liability coverage. Policy form may be either occurrence or claims-made; 

(iv) Automobile Liability Insurance with limits per accident determined by the Westlake Parties on a commercially reasonable
basis and covering any auto; 

  
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 (v) Excess/Umbrella Liability Insurance written on an occurrence or integrated
occurrences basis and providing coverage limits in excess of the primary limits of the insurance described in clauses (ii), (iii) and (iv) above; the limits of such excess/umbrella coverage shall be determined by the Westlake Parties on a
commercially reasonable basis; 
 (vi) Property Insurance, on an “All Risks” of physical loss or damage to all of
the Partnership Entities’ and the Westlake Entities’ real and personal property (including the Assets and the Westlake Complexes) and time element loss in which the MLP and the Westlake Entities have an insurable interest; such coverage
shall name the Partnership Entities as named insureds and meet the requirements of any Lender; and 
 (vii) Environmental
Insurance having limits of liability of an amount per pollution condition and an aggregate amount for all pollution conditions, each as determined by Westlake on a commercially reasonable basis, which provide reasonably obtainable coverage for
bodily injury, property damage, or remediation costs to the Partnership Entities’ and the Westlake Entities’ property or to third parties, relating to pollution conditions, including Releases, Hazardous Substances or Remediations; such
coverage shall name the Partnership Entities as named insureds. 
 Except for workers’ compensation insurance and that insurance described above as to
which the Partnership Entities are required to be named as named insureds, the insurance described in this Section 6.1(b) shall include the Partnership Entities as additional insureds as to the operations and activities of the Assets and
the Westlake Complexes. It is further agreed that such insurance shall be primary with regard to the aforementioned additional insured status. 

(c) All policies, binders or interim insurance contracts with respect to insurance maintained by the Westlake Entities pursuant to
Section 6.1(b) and with respect to insurance maintained by the MLP pursuant to Section 6.2 shall: 

(i) be placed with reputable, creditworthy insurance companies of nationally recognized standing and reasonably acceptable to
the MLP, the Westlake Entities and (if applicable) Lenders and that are licensed or authorized to do business in the State of Texas; 

(ii) state that it is primary, or is excess only with respect to the specific primary policy provided by the same Party for
such coverage, and not excess or contributing as with respect to any other insurance (or self-insurance) available to any other Person or Lender insured thereunder and that all provisions thereof, except the limits of liability, shall operate in the
same manner as if there were a separate policy covering each insured under each such policy; 
 (iii) provide that there will
be no recourse against any additional insured for the payment of premiums or commissions (if such policies provide for the payment thereof) or additional premiums or assessments, it being understood that such are obligations of the named insured
providing such insurance pursuant to this Agreement; 

  
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 (iv) waive any right of subrogation of the insurers thereunder against the MLP,
Lender and the members, partners, officers and directors and employees of each of them with respect to insurance described in Section 6.1(b), waive any right of subrogation of the insurers thereunder against the Westlake Entities and
their Affiliates and the members, partners, officers, directors and employees of each of them with respect to insurance described in Section 6.2, and waive any right of the insurers to any set-off or counterclaim or any other deduction,
whether by attachment or otherwise, with respect to any liability of any such Person insured under such policy; 
 (v) with
respect to the interests of the additional named insureds, provide that such insurance shall not be invalidated by any action or inaction of the additional named insureds and shall insure the additional named insureds regardless of any breach or
violation of any warranty, declaration or condition contained in such insurance by the primary named insured; and 
 (vi)
provide that it may not be canceled or materially changed without giving the MLP 30 days prior written notification thereof with respect to insurance described in Section 6.1(b), and without giving the Westlake Entities 30 days prior
written notification thereof with respect to insurance described in Section 6.2. 
 (d) Reference is made to the fact that the
Westlake Entities periodically review the availability, terms and cost of property and liability insurance coverages with respect to the Westlake Complexes and other properties and operations of the Westlake Entities and their Affiliates. During the
term of this Agreement, the Westlake Entities agree to conduct such review no less frequently than once each fiscal year. On or about the completion of each such review, the Westlake Entities will notify the MLP of the results of such review. The
Westlake Entities and the MLP shall thereafter reasonably cooperate in determining the limits, deductibles, self-insured retention amounts and other material terms that will apply to the renewal or replacement insurance coverages to be acquired by
the Westlake Entities and as to which the MLP will be a named insured or additional insured consistent with the provisions of this Section 6.1; and in each case the determination to be made in accordance with the preceding provisions of
this sentence shall take into account the terms and cost of the available insurance coverages. Notwithstanding anything to the contrary, until such time as the MLP is responsible for acquiring a particular insurance coverage pursuant to the last
sentence of Section 6.1(a), the Westlake Entities shall have the right to acquire such insurance coverage even if the Westlake Entities and the MLP have failed to reach a mutual determination on the limits, deductibles or other terms of
such coverage. 
 Section 6.2 (a) MLP Insurance. MLP shall obtain and maintain (or cause to be obtained and maintained)
at its expense the minimum insurance described below under individual or blanket policies:  
 (i) In the event any of
the Partnership Entities has any employees, such Partnership Entity will obtain and maintain at all times statutory Workers’ Compensation Insurance in compliance with Applicable Law; and 

(ii) During any period when the last sentence of Section 6.1(a) is applicable, the property insurance referenced in
such sentence. 

  
 21 

 (b) Reference is made to the fact that the MLP will periodically review the availability, terms
and cost of property and liability insurance coverages with respect to the Assets. During the term of this Agreement, the MLP agrees to conduct such review no less frequently than once each fiscal year of the MLP. On or about the completion of each
such review, the MLP will notify the Westlake Entities of the results of such review. The Westlake Entities and the MLP shall thereafter reasonably cooperate in determining the limits, deductibles, self-insured retention amounts and other material
terms that will apply to the renewal or replacement insurance coverages to be acquired by the MLP consistent with the provisions of this Section 6.2; and in each case the determination to be made in accordance with the preceding
provisions of this sentence shall take into account the terms and cost of the available insurance coverages. Notwithstanding anything to the contrary, the MLP shall have the right to acquire such insurance coverage even if the MLP and the Westlake
Entities have failed to reach a mutual determination on the limits, deductibles or other terms of such coverage. 
 Section 6.3
Certificates; Proof of Loss. On or before the required date for the insurance to be provided hereunder, each Party shall furnish certificates of insurance to the other Party evidencing the insurance required of such Party pursuant to this
Agreement. The Party maintaining each insurance hereunder shall make all proofs of loss under each such policy and shall take all other action reasonably required to ensure collection from insurers for any loss under any such policy, except that the
MLP may require the Westlake Entities to provide such proof of loss and take such other action on behalf of the MLP in the case of the insurance maintained by the MLP pursuant to Section 6.2. 

Section 6.4 Payment of Deductible Amounts. Notwithstanding which Party shall have obtained, or have been responsible for
obtaining, insurance under Section 6.1 or 6.2(i), the Person making the claim under any liability insurance shall bear any deductible or self-insured retention amount applicable to such claim; provided that if any other Person
insured under such liability insurance is also liable with respect to the occurrence giving rise to such claim, then the Person making the claim and such other Persons shall each bear its pro rata share of such deductible or self-insured retention
amount based on the allocation of liability among them; and (b) the Person making the claim under any property insurance shall bear any deductible or self-insured retention amount applicable to such claim; provided, if the occurrence giving
rise to such claim also results in damage to or loss of property owned by any other Person insured under such property insurance, then the Person making the claim and such other Persons shall bear its pro rata share of such deductible or
self-insured retention amount based on the damage and loss suffered by such Person as compared to the aggregate damage and loss suffered by all such Persons. 

Section 6.5 Contractor’s Insurance. MLP and the Westlake Entities shall require their respective contractors and their
subcontractors performing any services or conducting any operations or taking any on site activities with respect to the Assets or Retained Assets to procure and maintain, at a minimum, the following insurance and all policies shall include the
Partnership Entities, the applicable Westlake Entity and (as applicable) Lender as additional insureds (except for workers compensation) and shall include waivers of subrogation in favor of 

  
 22 

 
the Partnership Entities, the applicable Westlake Entity and Lender. Such insurance will be primary and non-contributory of any insurance carried by or maintained on behalf of the Partnership
Entities, the applicable Westlake Entity or Lender. 
 Any contractor of the MLP or a Westlake Entity shall carry, and shall either cause
its subcontractors to carry or to provide access to, insurance for Workers’ Compensation, Employer’s Liability, project specific Commercial General Liability (including Products & Completed Operations and Sudden &
Accidental Pollution), Watercraft and Aircraft Liability (if same are used in providing services) and Automobile Liability insurance (including “any auto”), each with minimum limits determined on a commercially reasonable basis (which can
be accomplished in conjunction with an umbrella insurance policy); provided that minimum amounts of Workers’ Compensation shall be set forth in Applicable Law. 

Any contractor of the MLP or a Westlake Entity shall also carry or provide access to Pollution Liability insurance as required by
environmental laws and/or regulations. Additionally, such contractors shall provide All Risks Property insurance with limits equal to the full value of the services and associated equipment during fabrication/construction and final delivery to the
MLP or the applicable Westlake Entity. Such contractors shall supply the MLP and the applicable Westlake Entity with certificates or policies of such insurance prior to entry upon premises of the MLP and the applicable Westlake Entity. MLP and the
applicable Westlake Entity shall be named as an additional insured, except for Workers’ Compensation and Employer’s Liability, and subrogation shall be waived on all insurance. All insurance of any contractor and their subcontractors shall
be primary. 
 Any contractor of the MLP or a Westlake Entity shall waive subrogation with respect to all deductibles and no self-insured
retention shall exceed the amount determined by the Westlake Parties on a commercially reasonable basis without written approval of the MLP and the Westlake Entities. Such contractors shall cause their and their subcontractors’ insurers to
provide the MLP and the Westlake Entities with thirty (30) days’ written notice of cancellation or material change. In the event any contractor or any of its subcontractors fail to procure or maintain in force the insurance specified
herein the MLP and the Westlake Entities may secure such insurance and the cost thereof shall be borne by such contractor. The insurance required under the Standard Terms and Conditions shall not be a limitation on any contractor’s liability
under this Agreement, nor shall it be limited by any other section of this Agreement. 
 Any contractor of the MLP or a Westlake Entity
shall carry project specific Professional Liability insurance covering claims to the extent resulting from their negligent performance of services. Minimum limits shall be set on a commercially reasonable basis. Claims-made coverage is
acceptable provided the policy retroactive date is maintained prior to the date services are rendered to the MLP and the applicable Westlake Entity and continuing for a period of time equal to two (2) years from the actual completion of such
contractor’s services. 

  
 23 

 ARTICLE VII 

CONFIDENTIAL INFORMATION 

Section 7.1 Information. Each of the Partnership Entities and the Westlake Parties (the “Recipient”)
agrees that it will utilize any Confidential Information received from the other solely in connection with the performance of its obligations hereunder and the exercise by the Recipient of its rights and remedies hereunder and under Applicable Law,
and all such Confidential Information will be subject to and bound by the provisions set forth in this Article VII. Upon termination of this Agreement and the Related Agreements, the Recipient shall return or destroy all such
Confidential Information (and cease all further use and disclosure of such Confidential Information) that has been provided to it, together with all reproductions thereof in the Recipient’s possession; provided that the Recipient shall have the
right to retain copies of any such information and records that relate to its performance of any services and the exercise of its rights and remedies hereunder or under the Related Agreements and under Applicable Law, and all such copies and the
information reflected thereon shall be subject to the first sentence of this Section 7.1 and to Section 7.2.  

Section 7.2 Definition. “Confidential Information” means any information (regardless of format or medium
of exchange) that is disclosed by any disclosing Party or any Affiliate, employee or agent thereof to the Recipient or any Affiliate, employee or agent of the Recipient in connection with the performance of this Agreement or the Related Agreements
or that any disclosing Party has reason to expect will be maintained confidentially provided that Confidential Information shall not include any information that is publicly known. It is further understood that each Party may have the opportunity as
a result of proximity or close operational ties to observe or obtain Confidential Information of any other Party and agrees not to divulge or use such information other than as set forth in this Article VII.  

Section 7.3 Legal Requirement. If the Recipient is legally required (by interrogatories, discovery requests for information
or documents, subpoena, civil or criminal investigative demand or similar process) to disclose any Confidential Information, it is agreed that the Recipient prior to disclosure will use commercially reasonable efforts to provide the disclosing Party
with prompt notice of such request(s) so that the disclosing Party may seek an appropriate protective order or other appropriate remedy or waive the Recipient’s compliance with this Article VII. If such protective order or other
remedy is not obtained, or the disclosing Party grants a waiver hereunder, the Recipient required to furnish Confidential Information may furnish that portion (and only that portion) of the Confidential Information which, in the opinion of such
Party’s counsel, the Recipient is legally compelled to disclose, and the Recipient will exercise commercially reasonable efforts to obtain reliable assurance that confidential treatment will be accorded any Confidential Information so
furnished. Disclosure of Confidential Information by the Recipient shall not violate this Article VII to the extent that Recipient (or its ultimate parent) in the exercise of reasonable good faith judgment deems it necessary, pursuant to
law, regulation or stock exchange rule, to disclose such information in or in connection with filings made with the Securities Exchange Commission, any securities exchange upon which debt or equity securities of such Recipient or its parent may be
listed, to any Governmental Authority or in presentations to lenders or ratings agencies. 

  
 24 

 Section 7.4 Survival. The provisions of this Article VII shall
survive the termination of this Agreement for a period of three years following such termination. 
 ARTICLE VIII 

INTELLECTUAL PROPERTY 

Section 8.1 Ownership by the Westlake Entities and License to MLP. Any (i) inventions, whether patentable or not,
developed or invented, or (ii) copyrightable material (and the intangible rights of copyright therein) developed, by the Westlake Entities, their Affiliates or their employees in connection with the performance of the Services shall be the
property of the Westlake Entities; provided, however, that the Westlake Entities hereby grant, and agree to cause their Affiliates to grant, to the MLP an irrevocable, royalty-free, non-exclusive and non-transferable (without the prior written
consent of the applicable Westlake Entity) right and license to use such inventions or material; and further provided, however, that the MLP shall only be granted such a right and license to the extent such grant does not conflict with, or result in
a breach, default, or violation of a right or license to use such inventions or material granted to the applicable Westlake Entity by any Person other than an Affiliate of the applicable Westlake Entity. Notwithstanding the foregoing, the Westlake
Entities will and will cause their Affiliates to, use all commercially reasonable efforts to grant such right and license to the MLP. 

Section 8.2 License to the Westlake Entities and their Affiliates. MLP hereby grants, and will cause its Affiliates to
grant, to the Westlake Entities and their Affiliates an irrevocable, royalty-free, non-exclusive and non-transferable right and license to use, during the term of this Agreement, any intellectual property provided by the MLP or its Affiliates to the
Westlake Entities or their Affiliates, but only to the extent such use is necessary for the performance of the Services. The Westlake Entities agree that the Westlake Entities and their Affiliates will utilize such intellectual property solely in
connection with the performance of the Services. 
 ARTICLE IX 

TERM; MISCELLANEOUS 

Section 9.1 Term. This Agreement shall terminate upon the termination of all of the Related Agreements; provided that any
claims for indemnification made under this Agreement within any required time period under this Agreement prior to termination shall survive termination. 

Section 9.2 Choice of Law; Submission to Jurisdiction. This Agreement shall be subject to and governed by the laws of the
State of Texas, excluding any conflicts-of-law rule or principle that might refer the construction or interpretation of this Agreement to the laws of another state. Each of the Parties hereby agrees: (i) to submit to the exclusive jurisdiction
of any state or federal court sitting in Houston, Texas in any action or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby, (ii) that all claims in respect of any such action or proceeding may be
heard and determined in any such court, (iii) that such Party will not bring any action or proceeding arising out of or relating to this Agreement in any other court, and (iv) that such Party waives any defense of inconvenient forum to the
maintenance of any such action or proceeding, and waives any bond, surety or other security that might be required of any other Party with respect to any such action or proceeding. 

  
 25 

 Section 9.3 Dispute Resolution. 

(a) The dispute resolution provisions set forth in this Section 9.3 shall be the final, binding and exclusive means to resolve all
disputes, controversies or claims (each, a “dispute”) arising under the Agreement, and each Party irrevocably waives any right to any trial by jury with respect to any dispute arising under this Agreement. 

(b) If a dispute arises, the following procedures shall be implemented: 

(i) Any Party may at any time invoke the dispute resolution procedures set forth in this Section 9.3 as to any
dispute by providing written notice of such action to the other Parties. 
 (ii) Notwithstanding the existence of any dispute
or the pendency of any procedures pursuant to this Section 9.3, and subject to Section 9.12, the Parties agree and undertake that all payments not in dispute shall continue to be made and that all obligations not in dispute
shall continue to be performed. 
 (iii) Within 30 days after receipt of notice of a dispute under subsection (b)(i),
representatives of the Parties shall engage in non-binding mediation, and a specific timetable and completion date for its implementation shall also be agreed upon. If the completion date therefor shall occur without the Parties having resolved the
dispute, then the Parties shall proceed under Section 9.3(b)(iv). 
 (iv) If, after satisfying the requirement above,
the dispute is not resolved, the Parties shall resolve the dispute by a binding arbitration, to be held in the State of Texas pursuant to the Federal Arbitration Act and in accordance with the then-prevailing Commercial Arbitration Rules of the
American Arbitration Association (the “AAA”). The AAA shall select one (1) arbitrator. Each Party shall bear its own expenses incurred in connection with arbitration and the fees and expenses of the arbitrator shall
be shared equally by the Parties involved in the dispute and advanced by them from time to time as required. It is the mutual intention and desire of the Parties that the arbitrator be selected as expeditiously as possible following the
submission of the dispute to arbitration. Once the arbitrator is selected and except as may otherwise be agreed in writing by the Parties involved in such dispute or as ordered by the arbitrator upon substantial justification shown, the hearing
for the dispute will be held within sixty (60) days of submission of the dispute to arbitration. The arbitrator shall render his final award within sixty (60) days, subject to extension by the arbitrator upon substantial justification
shown of extraordinary circumstances, following conclusion of the hearing and any required post-hearing briefing or other proceedings ordered by the arbitrator. Any discovery in connection with
arbitration hereunder shall be limited to information directly relevant to the controversy or claim in arbitration. The decision of the arbitrator in any such proceeding will be reasoned, final and binding and final judgment may be entered upon
such an award in any court of competent jurisdiction, but entry of such 

  
 26 

 
judgment will not be required to make such award effective. Any action against any Party ancillary to arbitration (as determined by the arbitrators), including any action for provisional or
conservatory measures or action to enforce an arbitration award or any judgment entered by any court in respect of any thereof may be brought in any federal or state court of competent jurisdiction located within the State of Texas, and the Parties
hereby irrevocably submit to the non-exclusive jurisdiction of any federal or state court located within the State of Texas over any such action. The Parties hereby irrevocably waive, to the fullest
extent permitted by Law, any objection which they may now or hereafter have to the laying of venue of any such action brought in such court or any defense of inconvenient forum for the maintenance of such action. Each of the Parties agrees that
a judgment in any such action may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. 

Section 9.4 Notice. All notices or requests or consents provided for by, or permitted to be given pursuant to, this
Agreement must be in writing and must be given by depositing same in the United States mail, addressed to the Person to be notified, postpaid, and registered or certified with return receipt requested or by delivering such notice in person or by
facsimile or e-mail to such Party. Notice given by personal delivery or mail shall be effective upon actual receipt. Notice given by facsimile or e-mail shall be effective upon actual receipt if received during the recipient’s normal business
hours or at the beginning of the recipient’s next Business Day after receipt if not received during the recipient’s normal business hours. All notices to be sent to a Party pursuant to this Agreement shall be sent to or made at the address
set forth below such Party’s signature to this Agreement or at such other address as such Party may stipulate to the other Parties in the manner provided in this Section 9.4.  

If to the Westlake Entities: 
  

					
	  
	  	
	  
	  	
	  
	  	
	  
	  	
	Attention:	 	  
	  	
	Fax:	 	  
	  	
	E-mail:	 	  
	  	

 If to the Partnership Entities: 
  

					
	  
	  	
	  
	  	
	  
	  	
	Attention:	 	  
	  	
	Fax:	 	  
	  	
	E-mail:	 	  
	  	

  
 27 

 Section 9.5 Entire Agreement. This Agreement and the Related Agreements
(including any exhibits hereto or thereto) constitute the entire agreement of the Parties relating to the matters contained herein and therein, superseding all prior contracts or agreements, whether oral or written, relating to the matters contained
herein and therein. 
 Section 9.6 Amendment or Modification. This Agreement may be amended or modified from time to time
only by the written agreement of all the Parties hereto; provided, that the MLP may not, without the prior approval of the Conflicts Committee, agree to any amendment or modification of this Agreement that, in the reasonable judgment of the GP, will
adversely affect the holders of Common Units. Each such instrument shall be reduced to writing and shall be designated on its face an “Amendment” or an “Addendum” to this Agreement. 

Section 9.7 Assignment. No Party to this Agreement may assign or otherwise transfer or delegate any of its rights or
obligations under this Agreement without the prior written consent of the other Parties hereto, and any purported transfer in violation hereof shall be null and void. This Agreement shall be binding upon, and inure the benefit of, permitted
successors and assigns. 
 Section 9.8 Counterparts. This Agreement may be executed in any number of counterparts with
the same effect as if all signatory parties had signed the same document. All counterparts shall be construed together and shall constitute one and the same instrument. 

Section 9.9 Severability. If any provision of this Agreement shall be finally determined to be unenforceable, illegal or
unlawful, such provision shall, so long as the economic and legal substance of the transactions contemplated hereby is not affected in any materially adverse manner as to any Party, be deemed severed from this Agreement and the remainder of this
Agreement shall remain in full force and effect. 
 Section 9.10 Further Assurances. In connection with this Agreement
and all transactions contemplated by this Agreement, each signatory party hereto agrees to execute and deliver such additional documents and instruments and to perform such additional acts as may be necessary or appropriate to effectuate, carry out
and perform all of the terms, provisions and conditions of this Agreement and all such transactions. 
 Section 9.11 No
Waiver. Failure of any Party to this Agreement to require performance of any provision of this Agreement shall not affect such Party’s right to full performance thereof at any time thereafter, and the waiver by any Party to this Agreement
of a breach of any provision hereof shall not constitute a waiver of any similar breach in the future or of any other breach or nullify the effectiveness of such provision. 

Section 9.12 Set Off. Each Party has the right to set off against any amounts due to the other Party hereunder any and all
amounts that the other Party owes to the first Party under this Agreement or the Related Agreements. 
 Section 9.13 Rights
of Third Parties. The provisions of this Agreement are enforceable solely by the Parties to this Agreement, and no third party (including any Limited Partner of the MLP) shall have the right, separate and apart from the Parties to this
Agreement, to enforce any provision of this Agreement or to compel any Party to this Agreement to comply with the terms of this Agreement. 

  
 28 

 [signatures on the following page] 

  
 29 

 IN WITNESS WHEREOF, the Parties have executed this Agreement on, and effective as of, the Closing
Date. 
  

			
	WESTLAKE MANAGEMENT SERVICES, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE CHEMICAL PARTNERS GP LLC
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE CHEMICAL PARTNERS LP
	
	By: Westlake Chemical Partners GP LLC, its general partner
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE CHEMICAL OPCO GP LLC
	
	By: Westlake Chemical OpCo GP LLC, its general partner
		
	By:	 	  

	Name:	 	
	Title:	 	

  
 Signature Page to
Omnibus Agreement 

 
			
	WESTLAKE CHEMICAL OPCO LP
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WPT LLC
	
	By: Westlake Chemical Investments, Inc. its manager
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE LONGVIEW CORPORATION
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE PETROCHEMICALS LLC
	
	 By: Westlake Chemical Investments, Inc.,

its Manager

		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE VINYLS, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	

  
 Signature Page to
Omnibus Agreement 

 
			
	WESTLAKE PVC CORPORATION
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE STYRENE LLC
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE POLYMERS LLC
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE VINYL CORPORATION
		
	By:	 	  

	Name:	 	
	Title:	 	

  
 Signature Page to
Omnibus Agreement 

 SCHEDULE I 

WESTLAKE COMPLEXES 
 Lake
Charles Assets 
  

	 	•	 	Styrene plant at the Petro Site that was started up in 1992; it is Technip ( Badger) technology and has a capacity of 570MM lb/yr. 

  

	 	•	 	Poly 3 at the Petro Site that was started up in 1998; licensed from Ineos and has a capacity of 600MM lb/ yr of LLDPE. 

  

	 	•	 	Five lines at the Poly Site with a total capacity of 850 MM lb/yr which consist of 4 autoclave units and 1 tubular unit that all make LDPE. 

 

	 	•	 	The tankage and dock at the Lake Charles Terminal to service the Styrene plant. 

  

	 	•	 	Service groups and facilities at the Petro Site, Poly Site and off site Administration building that support all of the plants. 

Calvert City Assets 
  

	 	•	 	The Chlor Alkali plant built in 1966 and occupies approximately 40 acres. It was upgraded and expanded to 275K ECU capacity in 2001 utilizing Asahi Kasei membrane technology. The feedstocks are rock salt and
electricity. 

  

	 	•	 	The VCM unit was built in 1953 utilizing B. F. Goodrich technology. The unit occupies approximately 55 acres and has an annual production capacity of 1.3 billion pounds of VCM. The feedstocks are Chlorine, Ethylene and
Oxygen as well as supplemental Ethylene Dichloride as required. 

  

	 	•	 	The PVC unit was built in 1959 and occupies approximately 26 acres. It has a current annual production capacity of 1.4 billion pounds. The unit’s feedstock is VCM produced by the Westlake VCM unit.

  
 Schedule I – Page 1

 SCHEDULE II 

SERVICES 
  

	 	•	 	services from the Westlake Parties’ employees in capacities equivalent to the capacities of corporate executive officers, except that those who serve in such capacities under this Agreement shall serve on a shared,
part-time basis only, unless and to the extent agreed otherwise by the Westlake Parties; 

  

	 	•	 	administrative and professional services, including, but not limited to, legal, accounting services, audit services, human resources, insurance, tax, credit, finance, government affairs and regulatory affairs;

  

	 	•	 	management of the MLP’s property and the property of the MLP’s subsidiaries in the ordinary course of business; 

  

	 	•	 	recommendations on capital raising activities to the GP’s Board of directors, including the issuance of debt or equity interests, the entry into credit facilities and other capital market transactions;

  

	 	•	 	managing or overseeing litigation and administrative or regulatory proceedings, and establishing appropriate insurance policies for us, and providing safety and environmental advice; 

 

	 	•	 	recommending the payment of distributions; and 

  

	 	•	 	managing or providing advice for other projects, including acquisitions, as may be agreed by the Westlake Parties and GP from time to time. 

  
 Schedule II – Page 1EX-10.4

 Exhibit 10.4 

SPECIFIC TERMS IN THIS EXHIBIT HAVE BEEN REDACTED BECAUSE CONFIDENTIAL TREATMENT OF THOSE TERMS HAS BEEN REQUESTED. THE REDACTED MATERIAL HAS BEEN
SEPARATELY SUBMITTED TO THE SECURITIES AND EXCHANGE COMMISSION, AND THE TERMS HAVE BEEN MARKED AT THE APPROPRIATE PLACE WITH THREE ASTERISKS (***). 

FORM OF 
 ETHYLENE SALES
AGREEMENT 
 between 

WESTLAKE CHEMICAL OPCO LP 

as Seller 
 and 

WPT LLC 

WESTLAKE VINYLS, INC. 

WESTLAKE PETROCHEMICALS LLC 

as Buyer 
 Dated
            , 2014 

 TABLE OF CONTENTS 

 

							
		 	 ARTICLE I

DEFINITIONS
	  			
			
	1.1	 	Certain Defined Terms	  	 	1	  
	1.2	 	Interpretation	  	 	7	  
			
		 	 ARTICLE II

TERM
	  			
			
		 	 ARTICLE III

ANNUAL PLANNED PRODUCTION
	  			
			
	3.1	 	Forecast of Annual Planned Production	  	 	7	  
	3.2	 	Monthly Output	  	 	8	  
			
		 	 ARTICLE IV

PURCHASE AND DELIVERY OBLIGATIONS
	  			
			
	4.1	 	Minimum Purchase and Take Commitments	  	 	8	  
	4.2	 	Buyer Deficiency	  	 	9	  
	4.3	 	Uniformity	  	 	10	  
	4.4	 	Pro Rata Reduction	  	 	11	  
	4.5	 	Title, Transfer and Possession of Ethylene	  	 	11	  
			
		 	 ARTICLE V

PRICE
	  			
			
	5.1	 	Price	  	 	11	  
	5.2	 	All Other Cash Production Costs	  	 	12	  
	5.3	 	Prior Year Adjustment	  	 	14	  
	5.4	 	Change in Law	  	 	15	  
			
		 	 ARTICLE VI

STATEMENTS AND PAYMENT
	  			
			
	6.1	 	Monthly Statements	  	 	16	  
	6.2	 	Payment	  	 	16	  
	6.3	 	Payment Method	  	 	17	  
	6.4	 	Access to Books and Records	  	 	17	  
	6.5	 	Adequate Assurance of Performance	  	 	17	  
			
		 	 ARTICLE VII

QUALITY
	  			
			
	7.1	 	Specifications	  	 	18	  
	7.2	 	Off-Spec Ethylene	  	 	18	  

  
 i 

					
		 	 ARTICLE VIII

MEASUREMENT AND TESTING
	  	
			
		 	 ARTICLE IX

FORCE MAJEURE
	  	
			
	9.1	 	Performance Excused	  	19
	9.2	 	Force Majeure Defined	  	19
	9.3	 	Force Majeure Notice	  	20
	9.4	 	Settlement of Industrial Disturbances	  	20
	9.5	 	Extended Force Majeure	  	20
			
		 	 ARTICLE X

TERMINATION
	  	
			
	10.1	 	General	  	20
	10.2	 	Seller Suspension	  	20
	10.3	 	Events of Default	  	21
	10.4	 	Remedies for Events of Default	  	21
	10.5	 	Termination for Extended Force Majeure	  	22
	10.6	 	Effect of Termination	  	22
			
		 	 ARTICLE XI

REPRESENTATIONS AND WARRANTIES
	  	
			
	11.1	 	Title to Ethylene	  	22
	11.2	 	Warranty to Specification	  	22
	11.3	 	Financial Obligations	  	22
	11.4	 	Disclaimer of any Other Warranties	  	22
			
		 	 ARTICLE XII

LIMITATIONS ON LIABILITIES
	  	
			
	12.1	 	Consequential Loss or Damage	  	22
	12.2	 	Liquidated Damages Not Penalty	  	23
	12.3	 	Exclusive Remedies	  	23
			
		 	 ARTICLE XIII

INSURANCE
	  	
			
		 	 ARTICLE XIV

CONFIDENTIALITY
	  	
			
	14.1	 	Information	  	23
	14.2	 	Definition	  	24
	14.3	 	Legal Requirement	  	24
	14.4	 	Survival	  	24

  
 ii 

					
		 	 ARTICLE XV

ASSIGNMENT; CHANGE OF CONTROL
	  	
			
	15.1	 	Assignment Generally	  	25
	15.2	 	Assignment to Affiliates	  	25
			
		 	 ARTICLE XVI

TAXES
	  	
			
		 	 ARTICLE XVII

MISCELLANEOUS
	  	
			
	17.1	 	Several Liability of Buyer Parties	  	26
	17.2	 	Choice of Law; Submission to Jurisdiction	  	26
	17.3	 	Dispute Resolution	  	26
	17.4	 	Survival	  	28
	17.5	 	Buyer’s Representative	  	28
	17.6	 	Notices	  	29
	17.7	 	Entire Agreement	  	29
	17.8	 	Amendment or Modification	  	29
	17.9	 	Counterparts	  	29
	17.10	 	Severability	  	29
	17.11	 	Further Assurances	  	30
	17.12	 	No Waiver	  	30
	17.13	 	Set Off	  	30
	17.14	 	Rights of Third Parties	  	30
	17.15	 	Legal Relationship	  	30
		
	SCHEDULES	  	
			
	Schedule 5.1	 	Price	  	
			
	Schedule 5.2	 	First Contract Year – All Other Cash Production Costs	  	
			
	Schedule 7.1	 	Specifications	  	

  
 iii 

 This ETHYLENE SALES AGREEMENT (this “Agreement”) is made and entered into as of
            , 2014 the (the “Effective Date”), by and among WESTLAKE CHEMICAL OpCo LP, a Delaware limited partnership
(“Seller”), and WPT LLC, a Delaware limited liability company, WESTLAKE VINYLS, INC., a Delaware corporation, and WESTLAKE PETROCHEMICALS LLC, a Delaware
limited liability company (each, a “Buyer Party,” and collectively, “Buyer”). Seller and Buyer hereinafter are referred to each individually as a “Party” and collectively as the
“Parties.” 
 WITNESSETH: 

WHEREAS, Seller owns and operates two ethylene production facilities at Westlake’s (as defined herein) Lake Charles, Louisiana complex
(collectively referred to as the “Lake Charles Plants”), and one ethylene production facility at Westlake’s Calvert City, Kentucky complex (the “Calvert City Plant,” and together with the Lake Charles Plants,
the “Plants,” and each, a “Plant”) with a current combined annual production capacity of approximately 3.4 billion pounds of Ethylene (as defined herein); 

WHEREAS, Seller desires to produce Ethylene and Associated Co-Product (as defined herein) at the Plants and sell and tender to Buyer, and Buyer desires to
purchase and receive from Seller, certain quantities of such Ethylene, subject to the terms and conditions hereinafter set forth and in conformity with the applicable Specifications (as defined herein); 

WHEREAS, Buyer desires to utilize certain quantities of Ethylene purchased under this Agreement as feedstock at certain petrochemical plants located in
Lake Charles, Louisiana; Geismar, Louisiana; Calvert City, Kentucky; and Longview, Texas (collectively, the “Downstream Facilities”), and sell certain quantities of Ethylene purchased under this Agreement to Affiliates (as defined
herein) and Third Parties (as defined herein); and 
 WHEREAS, the Parties are entering into this Agreement with the understanding that Seller
will enter into the Feedstock Supply Agreement (as defined herein) with Westlake Petrochemicals LLC, a Delaware limited liability company (“WLK-Petrochemicals”), for the supply of Ethane (as defined herein) and any Other Feedstock
(as defined herein) to Seller, in each case as a feedstock for the production of Ethylene. 
 NOW, THEREFORE, Seller and Buyer, in consideration of
the premises and mutual covenants hereinafter set forth, do hereby agree as follows: 
 ARTICLE I 

DEFINITIONS 
  

	1.1	Certain Defined Terms. For the purposes of this Agreement, the following terms shall have the following meanings: 

“AAA” shall have the meaning set forth in Section 17.3(b)(iv). 

“Adequate Assurance of Performance” shall have the meaning set forth in Section 6.5(d). 

  
 1 

 “Actual Energy” shall have the meaning set forth in
Schedule 5.1. 
 “Actual Yield” shall have the meaning set forth in Schedule 5.1. 

“Affiliate” means (a) with respect to Westlake, any other Person that directly or indirectly through one or more
intermediaries controls or is controlled by Westlake, excluding Westlake Chemical Partners GP LLC and any other Person that directly or indirectly through one or more intermediaries is controlled by Westlake Chemical Partners GP LLC; (b) with
respect to the Partnership Entities (as defined in the Omnibus Agreement), any Person that directly or indirectly through one or more intermediaries is controlled by Westlake Chemical Partners GP LLC; and (c) with respect to any other Person,
any other Person that directly or indirectly through one or more intermediaries controls, is controlled by or is under common control with such first Person; provided that, for purposes of this Agreement, Seller and Buyer shall not be
considered Affiliates of each other. As used herein, the term “control” means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a Person, whether through
ownership of voting securities, by contract or otherwise. 
 “Agreement” shall have the meaning set forth in the
Preamble. 
 “All Other Cash Production Costs” or “AOCPC” shall have the meaning set forth in
Section 5.2(a). 
 “Annual Minimum Quantity” shall have the meaning set forth in
Section 4.1(a)(i). 
 “Annual Output” shall have the meaning set forth in Section 4.1(a)(ii).

 “Annual Planned Production” shall have the meaning set forth in Section 3.1. 

“Associated Co-Product” shall mean the co-products (including propylene, butadiene and hydrogen) derived from the production
of Ethylene. 
 “Base Rate” shall mean, interest compounded on a Monthly basis, at the rate per annum equal to the one-month
term, London Interbank Offered Rate (LIBOR rate) for U.S. dollar deposits, as published by The Wall Street Journal or if not published, then by the Financial Times of London. 

“Btu” or “British Thermal Unit” shall mean the amount of heat required to raise the temperature
of one pound of pure water from fifty-nine degrees Fahrenheit (59°F) to sixty degrees Fahrenheit (60°F) at a constant pressure of fourteen and six hundred and ninety-six thousandths (14.696) pounds per square inch absolute.

 “Business Day” shall mean every Day other than Saturdays, Sundays, and United States public holidays. 

“Buyer” shall have the meaning set forth in the Preamble. 

“Buyer Deficiency Quantity” shall have the meaning set forth in Section 4.2(a). 

  
 2 

 “Buyer Event of Default” shall have the meaning set forth in
Section 10.3(b). 
 “Buyer Party” shall have the meaning set forth in the Preamble. 

“Buyer’s Representative” shall have the meaning set forth in Section 17.5. 

“Calvert City Plant” shall have the meaning specified in the Recitals. 

“Co-Product Credit” shall have the meaning set forth in Schedule 5.1. 

“Change in Law” shall have the meaning set forth in Section 5.4. 

“Confidential Information” shall have the meaning set forth in Section 14.2. 

“Contract Year” shall mean a calendar year that commences on January 1 and ends on December 31 of such calendar
year, except that (a) the first Contract Year shall commence on the Effective Date and end on December 31, 2014, and (b) the final Contract Year shall commence on January 1 of the calendar year in which the Term expires or is
terminated in accordance herewith, and end on the last Day that this Agreement is in effect. 
 “Cost Category” shall have
the meaning set forth in Section 5.2(a). 
 “Cost of Energy” shall have the meaning set forth in
Schedule 5.1. 
 “Cost of Feedstock” shall have the meaning set forth in Schedule 5.1. 

“Cost Overrun” shall have the meaning set forth in Section 5.3(a)(i). 

“Day” shall mean a 24-hour period commencing immediately upon midnight. 

“Default Rate” shall mean the Base Rate plus two percentage points per annum, applicable on the first Business Day prior to
the due date of payment and thereafter on the first Business Day of each succeeding Month; provided, however, that the Default Rate shall never exceed the maximum rate permitted by applicable Law. 

“Delivery Point” shall mean, in respect of each applicable Plant, the exit flange at the battery line, as more fully described
and depicted in the applicable Site Lease Agreement, or such other points that may be designated by the Parties from time to time in writing. 

“dispute” shall have the meaning set forth in Section 17.3(a). 

“Downstream Facilities” shall have the meaning specified in the Recitals. 

“Effective Date” shall have the meaning set forth in the Preamble. 

“Energy Efficiency Adjuster” shall have the meaning set forth in Schedule 5.1. 

  
 3 

 “Ethane” shall mean ethane conforming to the applicable specifications set forth
in the Feedstock Supply Agreement. 
 “Ethylene” shall mean the ethylene product conforming to the applicable
Specifications. 
 “Ethylene Shortfall Fee” shall have the meaning set forth in Section 4.2(c). 

“Excess Quantity” shall have the meaning set forth in Section 4.1(d). 

“Expansion Capital Expenditures” shall have the meaning set forth in Section 5.2(d)(iii). 

“Feedstock Efficiency Adjuster” shall have the meaning set forth in Schedule 5.1. 

“Feedstock Shortfall Fee” shall have the meaning given to such term in the Feedstock Supply Agreement. 

“Feedstock Supply Agreement” shall mean that certain feedstock supply agreement entered into by and between WLK-Petrochemicals
and Seller on or about the date hereof. 
 “Fixed Cash Conversion Costs” shall have the meaning set forth in
Section 5.2(a). 
 “Force Majeure” shall have the meaning set forth in Section 9.2. 

“Gallon” means a U.S. gallon of 231 cubic inches of liquid at sixty degrees Fahrenheit (60°F) and equilibrium vapor
pressure of the liquid. 
 “Governmental Authority” shall mean any foreign, federal, state, regional, local, municipal,
tribal or other government; any governmental, regulatory or administrative agency, commission, body or other authority exercising or entitled to exercise any administrative, executive, judicial, legislative, regulatory or taxing authority or power;
and any court or governmental tribunal. 
 “Initial Term” shall have the meaning set forth in Article II. 

“Lake Charles Plants” shall have the meaning specified in the Recitals. 

“Law” shall mean any law, statute, code, ordinance, order, rule, rule of common law, regulation, judgment, decree, injunction,
franchise, permit, certificate, license, authorization, or other directional requirement of any Governmental Authority. 

“Maintenance Cost Reserves (Capital)” shall have the meaning set forth in Section 5.2(a). 

“Maintenance Cost Reserves (Expense)” shall have the meaning set forth in Section 5.2(a). 

  
 4 

 “Metering Point” shall mean a point, which shall be downstream of the applicable
Delivery Point, at which Ethylene deliveries under this Agreement are measured pursuant to the requirements of Article VIII, and that is, 
  

	 	(a)	with respect to the Calvert City Plant, located at FI-804 and FI-2; 

  

	 	(b)	with respect to Ethylene delivered at the Lake Charles Plants to any of the Downstream Facilities located in Lake Charles, Louisiana, located at FI-601, FI-302, FI-908 and FI-913; and 

 

	 	(c)	with respect to Ethylene delivered at the Lake Charles Plants to any of the Downstream Facilities not located in Lake Charles, Louisiana, or otherwise, located at F1Y-850, Mtr #70, FQI6202a and TL1133HMCLB1;

 or such other points that may be designated by the Parties from time to time in writing. 

“MMBtu” shall mean one million Btu on a gross real heating value basis. 

“Month” shall mean a calendar month (according to the Gregorian calendar), (and “Monthly” shall refer to a
frequency of one Month) and also refers to the partial calendar months created by the beginning and end of the Term, as applicable, except that (a) the Month during which the Effective Date occurs shall be deemed the first Month that this
Agreement is in effect, and (b) the Month during which the Term expires or is terminated in accordance herewith shall be deemed the final Month that this Agreement is in effect. 

“Monthly Statement” shall have the meaning set forth in Section 6.1. 

“Natural Gas” shall mean natural gas conforming to the applicable specifications set forth in the Services Agreement. 

“Off-Spec Ethylene” shall have the meaning set forth in Section 7.2(a). 

“Omnibus Agreement” means the Omnibus Agreement among Seller and certain Affiliates of Westlake dated on or about the date
hereof. 
 “Other Feedstock” shall mean Plant feedstock other than Ethane conforming to the specifications set forth in the
Feedstock Supply Agreement. 
 “Party/Parties” shall have the meaning specified in the Preamble. 

“Period” shall have the meaning set forth in Schedule 5.1. 

“Person” shall mean any individual, partnership, corporation, limited liability company, unlimited liability company,
association, firm, foundation, joint stock company, trust, joint venture, unincorporated organization, Governmental Authority (or any department, agency, or political subdivision thereof) or any other entity (in each case whether or not incorporated
and whether or not having a separate legal identity). 
 “Plant/Plants” shall have the meaning specified in the Recitals.

  
 5 

 “Poly Purge” shall mean the ethylene product recycle stream from certain Plants.

 “pound” or “lb” shall mean one pound avoirdupois. 

“Price” shall have the meaning set forth in Section 5.1. 

“Prior Year Adjustment” shall have the meaning set forth in Section 5.3(a). 

“Production Shortfall” shall have the meaning set forth in Section 5.3(a)(i). 

“Propane” shall mean propane conforming to the applicable specifications set forth in the Feedstock Supply Agreement. 

“Reasonable and Prudent Operator” shall mean a Person seeking in good faith to perform its contractual obligations, and in so
doing, and in the general conduct of its undertaking, acting in a proper and workmanlike manner in accordance with practices customarily used in the operation of ethylene production or similar facilities, and exercising that degree of skill,
diligence, prudence, and foresight that would reasonably and ordinarily be expected from a skilled and experienced operator engaged in the same type of undertaking under the same or similar circumstances and conditions. 

“Related Agreements” means this Agreement, the Feedstock Supply Agreement, the Services Agreement, the Site Lease Agreement,
and the Omnibus Agreement. 
 “Renewal Term” shall have the meaning set forth in Article II. 

“Seller” shall have the meaning specified in the Preamble. 

“Seller Event of Default” shall have the meaning set forth in Section 10.3(a). 

“Services Agreement” means the Services Agreement among Seller and certain Affiliates of Westlake dated on or about the date
hereof. 
 “SG&A Expenses” shall have the meaning set forth in Section 5.2(a). 

“Shortfall Amount” shall have the meaning set forth in Section 5.3(a)(ii). 

“Site Lease Agreement” means, with respect to each Plant, the Site Lease Agreement between Seller and an Affiliate of Westlake
dated on or about the date hereof. 
 “Specifications” shall have the meaning set forth in Section 7.1. 

“Term” shall have the meaning set forth in Article II. 

“Third Party” shall mean any Person that is not a Party or an Affiliate of a Party. 

“Turnaround Cost Reserves” shall have the meaning set forth in Section 5.2(a). 

“Variable Cash Conversion Costs” shall have the meaning set forth in Section 5.2(a). 

  
 6 

 “Westlake” shall mean Westlake Chemical Corporation, a Delaware corporation.

 “WLK-Petrochemicals” shall have the meaning specified in the Recitals. 

 

	1.2	Interpretation. Within this Agreement, including the Recitals and attachments, except where expressly provided to the contrary, (a) in the event of a conflict, the provisions of the main body of this
Agreement shall prevail over the provisions contained in any attachment; (b) words denoting the singular include the plural and vice versa, unless the context requires otherwise; (c) words denoting individuals or persons include all types
of Persons, unless the context requires otherwise; (d) words denoting any gender include male, female, and neuter genders, unless the context requires otherwise; (e) references to Sections, paragraphs, recitals, Articles, Schedules, and
Exhibits shall mean Sections in, paragraphs of, recitals to, Articles of, Schedules to, and Exhibits to this Agreement; (f) references to any document (including this Agreement) or to any Law shall mean the same as amended, modified or restated
from time to time; (g) references to any amount of money shall mean a reference to the amount in United States dollars; (h) references to a time and date in connection with the performance of an obligation by a Party shall mean a reference
to the time and the date in the location where the relevant Plant(s) is located or the location where the relevant activities are to be performed if such activities will not be performed at the applicable Plant(s); (i) references to a Party or
any Person shall include its successors and permitted assigns; (j) the words “include” and “including” shall be deemed to be qualified by a reference to “without limitation”; (k) “or” when used as a
conjunction shall connote “any or all of”; (l) words, phrases or expressions that are not defined in this Agreement but that have a generally accepted meaning in the practice of measurement and metering in the international businesses
of production, transportation, distribution, tolling, purchase, and sale of Ethylene shall have that meaning in this Agreement; and (m) no consideration shall be given to the fact or presumption that one Party had a greater or lesser hand in
drafting this Agreement. 

 ARTICLE II 

TERM 
 This Agreement shall become
effective on the Effective Date and, unless earlier terminated in accordance with Article X, shall continue in effect until December 31, 2026 (such period, the “Initial Term”). This Agreement will continue in effect
thereafter on an annual basis (each period after the end of the Initial Term during which this Agreement remains in effect, a “Renewal Term”) unless and until terminated at the end of either the Initial Term or any Renewal Term upon
no less than 12 Months’ prior written notice; provided that the Term of this Agreement shall not be renewed unless and until the Feedstock Supply Agreement is simultaneously renewed. The Initial Term and any Renewal Term are referred to
herein collectively as the “Term.” 
 ARTICLE III 

ANNUAL PLANNED PRODUCTION 
  

	3.1	 Forecast of Annual Planned Production. Not later than 30 Days prior to the first Day of each Contract Year,

  
 7 

	 	
Seller shall furnish to Buyer in writing a non-binding forecast that sets out a reasonable good faith projection of the total quantity of Ethylene (in pounds) that it will produce during such
Contract Year, which projection shall be based on Seller’s then-current budget for each Plant and take into account Seller’s reasonable estimate of planned outages at each Plant during such Contract Year (such amount, the “Annual
Planned Production”); provided that the Annual Planned Production for the first Contract Year shall equal Seller’s forecasted aggregate production of Ethylene (in pounds) for such Contract Year beginning on the Effective
Date and ending December 31, 2014. Seller shall use commercially reasonable efforts to produce its actual annual output during each Contract Year on a ratable Monthly basis. 

 

	3.2	Monthly Output. Subject to Section 4.1(a)(ii), prior to the first Day of each Month, Seller shall provide to Buyer in writing a forecast of the quantity of Ethylene (in pounds) that Seller expects to
make available at each Delivery Point during the following Month. 

 ARTICLE IV 

PURCHASE AND DELIVERY OBLIGATIONS 
  

	4.1	Minimum Purchase and Take Commitments. 

  

	 	(a)	Commencing with the Effective Date, and continuing throughout the Term, subject in each case to the terms and conditions of this Agreement, Seller shall produce, make available, and sell, and Buyer shall purchase, take
delivery of and accept at the applicable Delivery Points, during each Contract Year: 

  

	 	(i)	the quantity of the Annual Planned Production notified to Buyer under Section 3.1 in respect of the relevant Contract Year (as adjusted pursuant to this Section 4.1, the “Annual Minimum
Quantity”), subject to the exercise of Buyer’s option pursuant to Section 4.1(d); and 

  

	 	(ii)	subject to purchases by Third Parties of Ethylene under clause (b) below, the offtake of which at the Delivery Points shall be governed by an exchange agreement, the aggregate quantities of Ethylene actually
produced at the Plants during such Contract Year (such Ethylene actually produced, regardless of whether purchased by Buyer, the “Annual Output”), not to exceed 3.8 billion pounds in a given Contract Year. 

 

	 	(b)	Notwithstanding anything contained herein to the contrary, 

  

	 	(i)	Seller shall be entitled from time to time during the Term, by prior notice, to adjust the Annual Minimum Quantity upward or downward if it determines, in its reasonable discretion, that any such adjustment is
(A) appropriate in order to account for operating conditions or marketing conditions or (B) appropriate in order that the aggregate quantities of Ethylene sold to Third Parties equal approximately 5% of such Annual Output; and

  

	 	(ii)	Seller will use reasonable efforts to sell such quantities to Third Parties uniformly over the course of each Contract Year. 

  
 8 

	 	(c)	The Annual Minimum Quantity for the Contract Year in which the Term commences and ends, respectively, shall be proportionately reduced based on the number of Days during such Contract Year that occur during the Term, if
applicable. 

  

	 	(d)	During any Contract Year, Seller shall be entitled (but not obligated) to produce Ethylene in excess of the Annual Planned Production (“Excess Quantity”). If Seller expects to produce Excess Quantity,
it shall notify Buyer of such production as soon as reasonably practicable. Buyer will have an option to purchase up to 95% of the notified Excess Quantity for such Contract Year at a price equal to the sum of (i) the Variable Cash Conversion
Costs divided by the Annual Planned Production for such Contract Year, plus (ii) $0.10/lb. Buyer shall exercise such option by notice to Seller within 15 Days of receipt of Seller’s notice; provided that if Buyer fails
to deliver such notification within such period, Buyer shall be deemed to have waived its option with respect to such Excess Quantity. 

  

	4.2	Buyer Deficiency. 

  

	 	(a)	If the total quantity of Ethylene purchased and taken by Buyer under this Agreement during any Contract Year (in pounds) is less than 

 

	 	(i)	the applicable Annual Minimum Quantity, minus 

  

	 	(ii)	quantities (in pounds) not made available by Seller during such Contract Year due to either 

  

	 	(A)	Seller’s breach of its obligations hereunder (including its failure to act as a Reasonable and Prudent Operator) or 

  

	 	(B)	Force Majeure affecting the Plants to the extent that any such occurrence exceeds 45 consecutive Days, 

then such deficiency (in pounds) shall be the “Buyer Deficiency Quantity.” 

 

	 	(b)	For the avoidance of doubt, the Buyer Deficiency Quantity shall not be reduced by any quantity of Ethylene not made available by Seller due to 

 

	 	(i)	Buyer’s breach of any of its obligations hereunder, or 

  

	 	(ii)	Force Majeure affecting the Plants to the extent that any such occurrence does not exceed 45 consecutive Days; or 

  

	 	(iii)	Force Majeure affecting Buyer. 

  

	 	(c)	If, in respect of any Contract Year, there is a Buyer Deficiency Quantity, Buyer shall pay Seller a deficiency fee (the “Ethylene Shortfall Fee”) equal to: 

  
 9 

	 	(i)	the Buyer Deficiency Quantity (expressed in pounds), multiplied by 

  

	 	(ii)	the sum of (A) $0.10 per pound of Ethylene, plus (B) the then-current All Other Cash Production Costs ($/lb), plus (C) the then-current Prior Year Adjustment, if any, divided by the Annual
Planned Production for such Contract Year. 

  

	 	(d)	If Buyer fails to take delivery for purchase under this Agreement of all quantities of Ethylene actually produced at the Plants excluding Ethylene sold by Seller to Third Parties, then, in addition to Buyer’s
obligations under Section 4.2(c), Buyer shall pay Seller, and indemnify and hold Seller harmless from and against, all direct, actual damages incurred by Seller in connection with such failure and all costs and expenses (if any) incurred
by Seller in proving the same, but without double recovery for amounts compensated to Seller pursuant to Section 4.2(c). 

  

	 	(e)	If Buyer does not purchase and take delivery of the Annual Minimum Quantity in a Contract Year, Seller shall rebate to Buyer the Variable Cash Conversion Costs that are actually avoided by Seller for such Contract Year,
if any, as a result of such deficiency, such rebate to be by way of credit in the invoice for the last Month of the Contract Year. 

  

	 	(f)	Notwithstanding anything contained herein to the contrary, Buyer shall not be obligated to pay the Ethylene Shortfall Fee if the shortfall giving rise to such payment obligation arises out of the failure by
WLK-Petrochemicals to make available, or by Seller to purchase and take delivery of, Ethane or Other Feedstock (if applicable) under the Feedstock Supply Agreement in accordance with the terms and conditions thereof. 

 

	 	(g)	Subject to Section 4.2(f), if at any time the Ethylene Shortfall Fee and the Feedstock Shortfall Fee may be applied to the same volume of Ethylene not produced or purchased, then with respect to only such
volume of Ethylene contemplated by this Section 4.2(g): 

  

	 	(i)	Buyer shall pay the applicable Ethylene Shortfall Fee in accordance with Section 4.2(c) and 

  

	 	(ii)	WLK-Petrochemicals shall have no obligation to pay the applicable Feedstock Shortfall Fee under the Feedstock Supply Agreement; 

it being understood and agreed that the Ethylene Shortfall Fee and the Feedstock Shortfall Fee shall not be applied in respect of the same
volume of Ethylene not produced or delivered. 
  

	4.3	Uniformity. Seller shall make available and Buyer shall receive and take quantities of Ethylene hereunder at each Delivery Point, as nearly as practicable, at uniform hourly and daily rates of flow for the
quantities of Ethylene purchased hereunder. 

  
 10 

	4.4	Pro Rata Reduction. If, during a Month, Seller is unable to deliver all or a portion of the total quantity of Ethylene that Seller is obligated to deliver to all of Seller’s term contracts (including this
Agreement) during such Month, Seller shall be entitled to allocate to Buyer a quantity of Ethylene no less than Buyer’s pro rata share of such total quantity during such Month. 

 

	4.5	Title, Transfer and Possession of Ethylene. Notwithstanding that the Metering Points are located downstream of the Delivery Points: 

 

	 	(a)	title to the Ethylene purchased and delivered hereunder shall pass from Seller to Buyer at the applicable Delivery Point free and clear of all liens, claims and encumbrances; 

 

	 	(b)	title to the Ethylene delivered at the Delivery Points but sold by Seller to Third Parties for delivery in accordance with the terms and conditions of an exchange agreement, shall remain with Seller or transfer to the
Third Party purchaser; 

  

	 	(c)	risk of loss of the Ethylene delivered hereunder, regardless of whether purchased by Buyer, shall pass from Seller to Buyer at the applicable Delivery Point free and clear of all liens, claims and encumbrances;

  

	 	(d)	Seller shall be deemed to be in exclusive control and possession of the Ethylene deliverable to Buyer hereunder prior to the time such Ethylene shall have been delivered to Buyer at the applicable Delivery Point, and
Buyer shall be deemed to be in exclusive control and possession thereof after such delivery; and 

  

	 	(e)	Seller shall bear all costs of any nature concerning the Ethylene sold by Seller to Third Parties for delivery in accordance with the terms and conditions of an exchange agreement, including all applicable taxes payable
by Seller in accordance with Article XVI. Buyer shall bear all costs of any nature concerning the Ethylene for which it has title, including all applicable taxes payable by Buyer in accordance with Article XVI.

 ARTICLE V 

PRICE 
  

	5.1	Price. Commencing with the Effective Date and continuing for each Month of the Term, Buyer shall pay Seller, for Ethylene received by Buyer hereunder, an amount, in $/lb (“Price”) determined in
accordance with the formula set forth below, as more fully described in Schedule 5.1. 

  
 11 

			
	Price ($/lb) =	  	+ Cost of Energy
		
		  	+ Cost of Feedstock
		
		  	+ Purge Gas Recovery
		
		  	+ All Other Cash Production Costs
		
		  	+ $0.10/lb
		
		  	+ Prior Year Adjustment
		
		  	– Co-Product Credit
		
		  	– Energy Efficiency Adjuster
		
		  	– Feedstock Efficiency Adjuster

  

	5.2	All Other Cash Production Costs. 

  

	 	(a)	AOCPC Defined. “All Other Cash Production Costs” or “AOCPC” (in $/lb) shall mean the sum of the following categories of costs (each, a “Cost Category”),
divided by (i) in respect of the first Contract Year, Seller’s forecasted volume of Ethylene production (in pounds) beginning July 1, 2014 and ending December 31, 2014, and (ii) in respect of each Contract Year during the Term beginning
January 1, 2015, the Annual Planned Production (in pounds), as notified in accordance with Section 3.1: 

  

			
	AOCPC ($/lb) =	  	+ Fixed Cash Conversion Costs
		
		  	+ Variable Cash Conversion Costs
		
		  	+ Maintenance Cost Reserves (Capital)
		
		  	+ Maintenance Cost Reserves (Expense)
		
		  	+ Turnaround Cost Reserves
		
		  	+ SG&A Expenses

 where: 

“Fixed Cash Conversion Costs” shall mean an amount (in $) equal to direct, indirect and contract labor; employee benefits;
safety and environmental expenses; insurance; ad valorem taxes and fees (excluding all other taxes); shared service allocations; and other fixed costs; 

“Variable Cash Conversion Costs” shall mean an amount (in $) equal to the cost of additive, non-recipe chemicals and other
variable materials and supplies; electricity; steam and other utilities, excluding fuel; 

  
 12 

 SPECIFIC TERMS IN THIS EXHIBIT HAVE BEEN REDACTED BECAUSE CONFIDENTIAL TREATMENT OF THOSE TERMS HAS BEEN
REQUESTED. THE REDACTED MATERIAL HAS BEEN SEPARATELY SUBMITTED TO THE SECURITIES AND EXCHANGE COMMISSION, AND THE TERMS HAVE BEEN MARKED AT THE APPROPRIATE PLACE WITH THREE ASTERISKS (***). 

“Maintenance Cost Reserves (Capital)” shall mean an amount (in $) equal to all capital expenditures categorized as
“maintenance” or “Safety and Environmental.” These capital items are also categorized as “non-discretionary.” Maintenance capital is defined as expenditures that replace or extend the life of an existing asset; 

 “Maintenance Cost Reserves (Expense)” shall mean an amount (in $) equal to the expenditures incurred to keep
assets operating at their present condition or to bring an asset back to an earlier condition. These expenses include direct and indirect costs including labor and parts; 

“Turnaround Cost Reserves” shall mean an amount (in $) reserved for major maintenance overhauls of any Plant performed
approximately every five years; and 
 “SG&A Expenses” shall mean an amount (in $) equal to all selling,
general and administrative expenditures charged to Seller including direct and indirect (overhead allocations) expenses. 
  

	 	(b)	AOCPC for First Contract Year. The AOCPC for the first Contract Year shall be $***/lb, which is calculated from: 

  

	 	(i)	with respect to each of Fixed Cash Conversion Costs, Variable Cash Conversion Costs, and SG&A Expenses: 

  

	 	(A)	Seller’s forecasted amounts (in $) for each such Cost Category covering the period of time beginning July 1, 2014 and ending December 31, 2014, as set forth in Schedule 5.2; divided by

  

	 	(B)	Seller’s forecasted volume of Ethylene production (in pounds) beginning July 1, 2014 and ending December 31, 2014, and 

  

	 	(ii)	with respect to each of Maintenance Cost Reserves (Capital), Maintenance Cost Reserves (Expense), and Turnaround Cost Reserves: 

  

	 	(A)	the sum (in $) of: 

  

	 	(1)	Seller’s forecasted amounts (in $) for each such Cost Category covering the period of time beginning July 1, 2014 and ending December 31, 2014, as set forth in Schedule 5.2, and 

 

	 	(2)	the sum (in $) of Seller’s forecasted amounts for each such Cost Category as estimated for each Contract Year beginning January 1, 2015 and ending December 31, 2018, with the figure obtained from the sum of
clause (1) above and this clause (2), as set forth in Schedule 5.2, divided by 

  

	 	(B)	the sum (in pounds) of: 

  

	 	(1)	Seller’s forecasted volume of Ethylene production (in pounds) beginning July 1, 2014 and ending December 31, 2014, and 

  

	 	(2)	the sum (in pounds) of amounts equaling Seller’s reasonable good faith projection of the total quantity of Ethylene (in pounds) that it will produce for each Contract Year beginning January 1, 2015 and ending
December 31, 2018. 

  

	 	(c)	AOCPC for Subsequent Contract Years. The AOCPC for each Contract Year after the first Contract Year shall be calculated as follows: 

 

	 	(i)	with respect to Fixed Cash Conversion Costs, Variable Cash Conversion Costs, and SG&A Expenses: 

  

	 	(A)	Seller’s forecasted amounts (in $) for each such Cost Category for such Contract Year, as adjusted for any Contract Year during the Term in accordance with Section 5.2(d)(iv), divided by 

 

	 	(B)	the Annual Planned Production (in pounds) for such Contract Year, and 

  

	 	(ii)	with respect to Maintenance Cost Reserves (Capital), Maintenance Cost Reserves (Expense), and Turnaround Cost Reserves: 

  

	 	(A)	Seller’s forecasted amounts (in $) for each such Cost Category, which shall be based on Seller’s reasonable good faith estimate, for each of the five Contract Years beginning January 1 of such Contract Year,
divided by 

  

	 	(B)	the sum (in pounds) of amounts equaling the Annual Planned Production for each such Cost Category for each of such five Contract Years. 

 

	 	(d)	Rules Applying to Calculation of AOCPC. 

  
 13 

	 	(i)	Increases in Costs. For each Contract Year after the first Contract Year, AOCPC shall not be 

  

	 	(A)	adjusted for increased expenses that result from the failure of Seller to act as a Reasonable and Prudent Operator, 

  

	 	(B)	adjusted for extraordinary or catastrophic repair and replacement costs, or 

  

	 	(C)	adjusted downward in the first three Contract Years or more frequently than three years from any prior downward adjustment. 

  

	 	(ii)	Cost Floor. All Other Cash Production Costs ($/lb) may not be reduced for any Contract Year below AOCPC determined for the first Contract Year. 

 

	 	(iii)	Expansion Capital Expenditures Are Outside of AOCPC. Except as may be agreed by the Parties in connection with an expansion of the Plants, Seller shall not be entitled to recover from Buyer any capital expenses
related to expansion or operational efficiency incurred after the Effective Date (“Expansion Capital Expenditures”), whether or not such Expansion Capital Expenditures increase the operating efficiency of a Plant. Seller shall be
entitled to any benefit that may result from incurring Expansion Capital Expenditures, including the benefits of a reduction in operating costs or an increase in operating efficiency. 

 

	 	(iv)	Adjustments to Certain Cost Categories. Cost Categories for each Contract Year shall be based on Seller’s then-current budget (which budget shall be based on Seller’s reasonable, good faith projections)
for each Plant for (A) in the case of each of Fixed Cash Conversion Costs, Variable Cash Conversion Costs, and SG&A Expenses, such Contract Year, and (B) in the case of each of Maintenance Cost Reserves (Capital), Maintenance Cost Reserves
(Expense), and Turnaround Cost Reserves, the five Contract Years beginning January 1 of such Contract Year. Prior to the beginning of each Contract Year, Seller shall notify Buyer of the All Other Cash Production Costs, each Cost Category, and such
other information as Buyer may reasonably request, for such Contract Year and, upon request, provide documentation setting forth the basis on which the AOCPC was determined. 

 

	 	(v)	Actuals. Subject to the Parties’ rights and obligations under Section 6.4, Seller shall submit to Buyer a Monthly statement setting out actual amounts incurred for each Cost Category, the total
quantities of Ethane and Other Feedstock utilized, and the total quantities of Ethylene produced and delivered, for such Contract Year. 

  

	5.3	Prior Year Adjustment. 

  

	 	(a)	If, in any Contract Year: 

  

	 	(i)	 due to reasons other than Seller’s failure to act as a Reasonable and Prudent Operator (A) Seller’s actual Ethylene production during
the prior Contract Year is less than the Annual Planned Production for such 

  
 14 

	 	
Contract Year (a “Production Shortfall”) or (B) the actual costs of operation of the Plants exceed the sum of the amounts (in $) for each Cost Category for (1)
in respect of the Contract Year beginning January 1, 2015, the period of time beginning on the Effective Date and ending December 31, 2014, and (2) in respect of each subsequent Contract Year, the prior Contract Year (a “Cost
Overrun”), or a combination of the scenarios described in clauses (A) and (B) of this Section 5.3(a)(i), and, as a result thereof, 

 

	 	(ii)	the aggregate amount (in $) recovered by Seller as All Other Cash Production Costs from Buyer is less than 95% of the actual costs incurred by Seller in respect of each Cost Category for the prior Contract Year, net of
any costs of Seller that have been satisfied pursuant to insurance proceeds actually received by Seller under Section 9.5 or otherwise (such positive difference (in $), the “Shortfall
Amount”), 

 then Seller will be entitled to include in the Price for the succeeding Contract
Year an adjustment in an amount, in dollars, not to exceed the Shortfall Amount (the “Prior Year Adjustment”). 
  

	 	(b)	If the aggregate Shortfall Amount for any Contract Year is not recovered as a Prior Year Adjustment in the next Contract Year, including as a result of a Production Shortfall or a Cost Overrun, the unrecovered portion
shall be carried forward and factored into the Prior Year Adjustment applied in respect of the following Contract Year. 

  

	5.4	Change in Law. The Parties hereby agree that if (a) compliance with any applicable Law enacted, promulgated, adopted or modified after the Effective Date requires additional costs related to operating or
maintaining any Plant or otherwise affects the sale of Ethylene to Buyer hereunder (which additional costs were, as of the Effective Date, not known or foreseen by any Party), and (b) such costs exceed $500,000 for any individual occurrence or
in the aggregate in any Contract Year during the Term (a “Change in Law”), in each case including ad valorem taxes and fees and excluding all other taxes, then Seller shall act reasonably and in good faith to secure a waiver from,
exception to, or extension of the time to comply with such Change in Law for the remainder of the Term, and make any other reasonable efforts to mitigate the effect of such Laws on the rights and obligations of the Parties under this Agreement. If,
despite such efforts, Seller would incur incremental, out-of-pocket costs in order to comply with such Change in Law and satisfy its obligations to Buyer under this Agreement, then Seller shall reasonably determine, and shall notify Buyer in writing
of, a Monthly surcharge to cover the costs of compliance therewith. The Monthly surcharge shall take into consideration (a) all capital expenditures reasonably incurred in connection with a Change in Law, (b) Buyer’s portion of the
total throughput and the remaining economic life thereof, and (c) the remaining duration of the Term. Seller shall provide Buyer with information reasonably required to verify Seller’s incurrence of such additional costs and its
determination of the Monthly surcharge. If Buyer wishes to dispute the Monthly surcharge, Buyer shall notify Seller thereof and the Parties shall thereafter negotiate in good faith to resolve such dispute. If the Parties cannot agree on the amount
of the Monthly surcharge within 30 Days following the receipt by Seller of Buyer’s dispute notice, then the matter shall be resolved in accordance with Section 17.3. If Buyer does not notify Seller within 30 Days that it is
disputing the Monthly surcharge, then Buyer shall pay Seller an amount equal to the Monthly surcharge. 

  
 15 

 ARTICLE VI 

STATEMENTS AND PAYMENT 
  

	6.1	Monthly Statements. On or before the 20th Day of each Month, Seller shall provide to each Buyer Party a statement for each of the Delivery Points setting forth Seller’s calculation of the total amount
payable by such Buyer Party for the prior Month for deliveries made to each Delivery Point (each, a “Monthly Statement”). The Parties shall provide for the exchange of all relevant data reasonably necessary in connection with
preparing each Monthly Statement, including the aggregate quantities (in pounds) of Ethylene delivered by Seller and taken by such Buyer Party for each Day of such Month at each Delivery Point, information relating to such Buyer Party’s share
of any Buyer Deficiency Quantity for such Month at each Delivery Point (if applicable), and information relating to any events of Force Majeure. 

  

	6.2	Payment. 

  

	 	(a)	Each Buyer Party shall pay the amount of each Monthly Statement (including any Ethylene Shortfall Fee), other than any amount thereof that is disputed in accordance with clause (d) below, no later than the
5th Day following receipt by Buyer of such Monthly Statement. If the due date for payment is not a Business Day, then the due date for payment shall be the immediately succeeding Business Day. Any adjustments necessary to reconcile the resolution of
a disputed amount with the amount actually paid shall be paid within five Days following resolution of the disputed amount. Any adjustments, whether for overpayment or underpayment, for disputed amounts shall bear interest at the Base Rate from the
date of overpayment or underpayment, as the case may be, until the actual date of payment. 

  

	 	(b)	In the event that any amount reflected in any statement or invoice is not paid when due, other than any amount thereof that is disputed in accordance with clause (d) below, such unpaid amount shall bear
interest from and including the Day following the due date therefor up to and including the date when payment is made, at the Default Rate. 

  

	 	(c)	If any Buyer Party fails to make payment of any amount of any Monthly Statement, other than any amount thereof that is disputed in accordance with clause (d) below, on or before the later of (i) the
60th Day after such payment is due and (ii) the 30th Day after notice by Seller of such non-payment, Seller shall have the right to suspend deliveries of Ethylene hereunder to such Buyer Party until such payment is made. 

 

	 	(d)	 Seller and Buyer, as the case may be, may withhold payment of all or any portion of any amount reflected as owing by such Party in any statement or
invoice received from the other Party to the extent that the receiving Party disputes 

  
 16 

	 	
payment of such amount or such portion thereof in good faith. For the avoidance of doubt, as to any Monthly Statement, Buyer may withhold payment as to any disputed amount, including to account
for any credit Buyer believes it is owed with respect to the purchase, sale or delivery of Ethylene, or the failure thereof. In the event of such a dispute, the disputing Party shall promptly notify the other Party, stating its reason for disputing
such amount and, to the extent available, providing reasonable supporting documentation therefor. 

  

	 	(e)	Buyer may dispute a Monthly Statement or any portion thereof, by notice to Seller, up to one calendar year following receipt of such Monthly Statement; provided that if Buyer fails to deliver such notification
within such period, Buyer shall be deemed to have waived the right to dispute the applicable Monthly Statement. 

  

	6.3	Payment Method. All payments under this Agreement shall be made in United States dollars by wire transfer in immediately available funds by deposit to the bank account designated in writing by the Party receiving
the payment. Any wire transfer charges shall be for the account of the Party making the payment. If a Party elects to change the bank or account to which payments are to be made, that Party shall notify the other Party before the effective date of
such change. 

  

	6.4	Access to Books and Records. To the extent necessary to verify the accuracy of any statement, invoice, charge or computation made under this Agreement, each Party shall have the right, at its cost, to interview
representatives of the other Party and to examine the books and records of the other Party relating to this Agreement during normal business hours and upon reasonable notice to the other Party; provided that each Party has the right to redact
from the records subject to examination any portions thereof as necessary to comply with such Party’s confidentiality obligations. Such examination must be commenced within 12 Months of receiving said statement, invoice, charge or computation
made under this Agreement and will take place at a location mutually agreeable to the Parties. All records subject to examination hereunder shall be caused to be retained for no less than two calendar years after their creation. If any such
examination establishes any inaccuracy in any billing made prior to such examination, the necessary adjustments to such billings will be made promptly without any interest charge. 

 

	6.5	Adequate Assurance of Performance. 

  

	 	(a)	If Seller, in its sole judgment, has reasonable grounds for insecurity regarding the ability of Buyer to perform its financial obligations hereunder, or any other material obligation under this Agreement, the
Parties shall work together in good faith to resolve Seller’s concerns. If the Parties cannot resolve such concerns, Seller may request that Buyer provide Adequate Assurance of Performance (as defined below) and if Buyer fails to provide
such Adequate Assurance of Performance within five Business Days of receipt of request therefor, Seller may, without waiving any other rights or remedies available to it under this Agreement or now or hereafter existing at Law or in equity, withhold
further deliveries until the demanded Adequate Assurance of Performance is received. 

  
 17 

	 	(b)	Buyer’s duty to provide such Adequate Assurance of Performance, if demanded in accordance herewith, shall be a condition precedent to Seller’s obligation to perform under this Agreement. 

 

	 	(c)	As of the Effective Date, Seller acknowledges that it is satisfied with Buyer’s ability to perform its obligations under this Agreement and therefore, as of the Effective Date, no Adequate Assurance of Performance
is required from Buyer. 

  

	 	(d)	“Adequate Assurance of Performance” shall mean sufficient security or proof of Buyer’s capability to perform its obligations under this Agreement in the form of any one of or a combination of one
or more of the following: (i) a guarantee from a creditworthy entity, (ii) a standby irrevocable letter of credit (in a form and amount and for a term reasonably acceptable to Seller and issued by a financial institution reasonably
acceptable to Seller), (iii) a prepayment, or (iv) a cash payment security deposit (to be held by Seller without obligation for payment of interest thereon). 

ARTICLE VII 

QUALITY 
  

	7.1	Specifications. All Ethylene sold and delivered to Buyer at each applicable Delivery Point pursuant to this Agreement shall conform to the applicable specifications set forth in Schedule 7.1 (with
respect to the applicable Plant, the “Specifications”). 

  

	7.2	Off-Spec Ethylene. 

  

	 	(a)	The Parties will work together to minimize (i) any deliveries or receipts of Ethylene that does not or will not conform to the applicable Specifications (“Off-Spec Ethylene”), and (ii) the
negative consequences that may result if and when Off-Spec Ethylene is delivered at a Delivery Point. Buyer shall use reasonable efforts to purchase Off-Spec Ethylene. 

 

	 	(b)	Seller shall be liable for any damages incurred by Buyer to the extent arising out of or resulting from Off-Spec Ethylene in accordance with the provisions of this Agreement if (but only if) Seller delivers Off-Spec
Ethylene to Buyer at a Delivery Point and Seller fails to act as a Reasonable and Prudent Operator in producing, testing, or handling such Off-Spec Ethylene. 

  

	 	(c)	Notwithstanding clauses (a) and (b) above, Seller’s liability in connection with the delivery by Seller to a Delivery Point of any Off-Spec Ethylene, on a per pound basis, shall not exceed
the Price as determined in accordance herewith. 

  
 18 

 ARTICLE VIII 

MEASUREMENT AND TESTING 
 Buyer shall own,
operate and maintain at each Metering Point the metering equipment necessary to measure the quantity of Ethylene delivered under this Agreement. All measurements and/or tests shall be made in accordance with the latest standards or guidelines
published by the ASTM or other applicable industry standard methods. Seller’s weight and/or other measurements of Ethylene shall be used for billing purposes, unless proved to be in error. Seller’s laboratory analysis and methods shall
determine whether Ethylene specifications have been met, unless Buyer proves to Seller’s reasonable satisfaction that Seller’s analysis report is erroneous. No Ethylene quantity claims will be made, including pursuant to
Article VII, unless the difference is more than one percent (1%) of the invoiced quantity. 
 ARTICLE IX 

FORCE MAJEURE 
  

	9.1	Performance Excused. Seller shall not be liable for any delay or failure in performance hereunder if and to the extent such delay or failure is a result of Force Majeure, except for the performance of any payment
obligation that has accrued prior to the Force Majeure event. Other than in the event of an extended period of Force Majeure pursuant to Section 9.5, nothing contained herein, express or implied, shall be construed to permit Buyer to
withhold, delay, or condition payment of any portion of the Ethylene Shortfall Fee in the event that a Buyer Deficiency Quantity accrues as a result of the occurrence or continuance of a Force Majeure; provided, however, that Seller shall not
be entitled to that portion of the Ethylene Shortfall Fee that equals the portion of the then-current All Other Cash Production Costs that Seller did not actually incur during the continuance of such Force Majeure. 

 

	9.2	Force Majeure Defined. The term “Force Majeure” shall mean any cause, whether of the kind enumerated herein or otherwise, which is not within the reasonable control of Seller, and which by the
exercise of reasonable diligence Seller is unable to prevent or overcome, and which wholly or partially prevents or delays Seller’s performance of any of its obligations under this Agreement (other than any payment obligations hereunder),
including any of the following which satisfy the foregoing criteria: acts of God; strikes, lockouts or other industrial disputes or disturbances; acts of the public enemy, sabotage, wars, blockades, insurrections, riots and other civil disturbances;
epidemics; landslides, floods, lightning, earthquakes, fires, tornadoes, hurricanes, named storms or other weather events that necessitate extraordinary measures and expenses to maintain operations of any of the Plants, and warnings for any of the
foregoing which may necessitate the precautionary shut-down of any Plant, any portion thereof, or other related facilities; arrests and restraints of governments (either federal, state, civil or military), including any orders of courts or of a
Governmental Authority; explosions, breakage or accidents to equipment, machinery, any Plant or any portion thereof, or lines of pipe, or the making of repairs or alterations to any of the foregoing necessitated as a result of a Force Majeure event;
inability to secure, or unavoidable delays in securing, labor or materials that are required for Seller’s performance hereunder; electric power shortages or outages; or the necessity for compliance with any applicable Law. 

  
 19 

	9.3	Force Majeure Notice. As soon as reasonably possible after the occurrence of a Force Majeure event, Seller shall provide written notice to Buyer, and in such notice shall give reasonably full particulars
concerning the nature, scope and anticipated duration of the Force Majeure. 

  

	9.4	Settlement of Industrial Disturbances. Notwithstanding anything contained herein to the contrary, the settlement of strikes, lockouts or other industrial disturbances shall be entirely within the discretion of
the Party experiencing such situations, and nothing herein shall require such Party to settle industrial disputes by yielding to demands made on it when it considers such action inadvisable. 

 

	9.5	Extended Force Majeure. If, after 45 consecutive Days have elapsed since the commencement of a Force Majeure continuously affecting any Plant, and Seller has been rendered and remains unable, wholly or in part,
by such Force Majeure to produce a quantity of Ethylene during a given Contract Year equal to the Annual Minimum Quantity, then (a) the Annual Minimum Quantity shall be reduced by a quantity of Ethylene equal to the annualized average of such
shortfall, (b) Buyer shall be credited such portion of the Ethylene Shortfall Fee(s) paid during the Contract Year (if any) for such deficient quantities, and (c) if (but only if) both Parties are entitled to insurance proceeds from the
same insurance carrier, Seller shall be entitled to any insurance proceeds from such carrier accruing during such extended period of Force Majeure on a first priority basis. Seller shall notify Buyer as soon as reasonably practicable if and when
Seller determines such Force Majeure is no longer continuing. Upon receipt of such notice by Buyer, the Parties’ respective obligations during such Contract Year to sell and tender, and purchase and receive, a quantity of Ethylene equal to the
Annual Minimum Quantity, less that quantity of Ethylene determined in accordance with clause (a) above, shall be reinstated for all purposes hereunder. 

ARTICLE X 

TERMINATION 
  

	10.1	General. In addition to the further provisions of this Article X, this Agreement shall terminate upon the expiration of the Initial Term or any Renewal Term, as the case may be, and shall be
terminable (a) upon the written agreement of the Parties, (b) by any Party following an uncured breach of this Agreement by the other Party, for a period of 60 Days after receipt by the breaching Party of written notice thereof,
(c) by any Party pursuant to Force Majeure in accordance with Section 10.5, (d) upon the effective date of termination of the Feedstock Supply Agreement, (i) by Buyer only, if such termination results from uncured breach
by Seller thereunder, and (ii) by Seller only, if such termination does not result from uncured breach by Seller thereunder, or (e) by Seller only, upon the effective date of expiration (if any) of the Feedstock Supply Agreement.

  

	10.2	 Seller Suspension. Without prejudice to any other rights and remedies available under this Agreement, Seller may suspend delivery of Ethylene
upon three Days’ advance written notice in any of the following circumstances: (a) Buyer has failed to make payments in full when due; (b) Buyer has failed to comply with its obligations under Section 6.5; or (c) at
Seller’s reasonable discretion, instead of or prior to terminating this 

  
 20 

	 	
Agreement, upon the occurrence of any Buyer Event of Default under Section 10.3(b) below. Upon and for the duration of such suspension, Seller shall be relieved of obligations to
supply Ethylene under this Agreement, but Buyer shall not be discharged of any of its obligations under this Agreement, including Buyer’s obligations under Article IV to take or pay for Ethylene. Seller shall resume delivering
Ethylene as soon as reasonably practicable following the cure of the events listed above and in any case within two Business Days of such cure. 

  

	10.3	Events of Default. 

  

	 	(a)	Seller Event of Default. A “Seller Event of Default” shall be deemed to exist upon the occurrence and during the continuance of any one or more of the following events: (i) Seller breaches a
material term of this Agreement, and such breach is not cured within 60 Days following written notice from Buyer; or (ii) Seller fails to pay any amount due under this Agreement in full within 60 Days of the due date of such payment, subject to
Section 17.13. 

  

	 	(b)	Buyer Event of Default. A “Buyer Event of Default” shall be deemed to exist upon the occurrence and during the continuance of any one or more of the following events: (i) Buyer breaches a
material term of this Agreement, and such breach is not cured within 60 Days following written notice from Seller; or (ii) Buyer fails to pay any amount due under this Agreement in full within 60 Days of the due date of such payment, subject to
Section 17.13. 

  

	10.4	Remedies for Events of Default. 

  

	 	(a)	Upon the occurrence of any Seller Event of Default or Buyer Event of Default that is not cured within the period of time provided by this Agreement, if any, Buyer (in the case of a Seller Event of Default) or Seller (in
the case of a Buyer Event of Default), as applicable, shall have the right to terminate this Agreement with 60 Days’ advance written notice to the defaulting Party and to pursue any other remedy provided under this Agreement or now or hereafter
existing at Law or in equity. Except in such circumstance or as elsewhere expressly provided in this Agreement, each Party waives any right to terminate this Agreement. If a fact giving rise to a right of termination is wholly or partly overcome
during such 60-Day notice period, then any notice of termination furnished under this Article X shall be deemed cancelled and of no effect and this Agreement shall remain in full force and effect. 

 

	 	(b)	Other than as expressly provided in this Agreement, Seller will not be entitled to suspend or terminate the delivery of Ethylene to Buyer under this Agreement in any circumstance, including in connection with the
exercise of a right of offset or other equitable remedy, and any purported suspension or termination of any delivery of Ethylene to Buyer shall be deemed to be a material breach of this Agreement by Seller under this Article X and permit
Buyer to exercise the remedies contemplated in this Section 10.4. 

  
 21 

	10.5	Termination for Extended Force Majeure. If a Force Majeure continues, or its consequence remains, such that Seller is unable to substantially comply with its obligations under this Agreement with respect to all
Plants continuously for a period in excess of 12 Months, then, provided such Force Majeure is still in effect at the time of notice, Buyer may terminate this Agreement upon 30 Days’ advance notice without any liability upon either of the
Parties to the other Party except to the extent that any amount shall have accrued prior to the occurrence of the event of Force Majeure. 

  

	10.6	Effect of Termination. Except as expressly provided in Section 10.1, no Party shall have any right to terminate this Agreement. Upon the termination of this Agreement, this Agreement shall become void
and have no effect, subject to Section 17.4, except that such termination shall not affect any rights or obligations that have vested, matured or accrued at any time prior to such termination. 

ARTICLE XI 

REPRESENTATIONS AND WARRANTIES 
  

	11.1	Title to Ethylene. Seller warrants title to all Ethylene supplied hereunder and covenants that Seller has all necessary right, authority and interest to produce, sell and deliver the Ethylene under this Agreement
and that such Ethylene will be free from liens, encumbrances, adverse claims and proprietary rights at the passing of title at each Delivery Point. 

  

	11.2	Warranty to Specification. Seller warrants to Buyer that Ethylene delivered hereunder meets the applicable Specifications. 

  

	11.3	Financial Obligations. Buyer warrants to Seller that it is unaware, as of the date hereof, of any fact related to its financial condition that would prevent it from performing its financial obligations under this
Agreement in accordance with the terms and conditions contained herein. 

  

	11.4	Disclaimer of any Other Warranties. EXCEPT AS OTHERWISE EXPRESSLY SET FORTH HEREIN, THE PARTIES MAKE NO, AND EXPRESSLY DISCLAIM ANY, REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, AT LAW OR IN EQUITY,
INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING ANY PLANT OR PORTION THEREOF, THE ETHYLENE, OR WITH RESPECT TO THE SUBJECT MATTER HEREOF. 

ARTICLE XII 

LIMITATIONS ON LIABILITIES 
  

	12.1	 Consequential Loss or Damage. Notwithstanding any other provision of this Agreement, no Party shall be liable to the other Party for or in
respect of any consequential loss or damage, special or punitive damages or loss of profits or business interruption, suffered or incurred by any other Party arising out of, in connection with, or resulting from, this Agreement, whether any claim
for such loss or damage is based on tort (including 

  
 22 

	 	
negligence), strict liability, contract (including breach of or failure to perform this Agreement or the breach of any representation or warranty hereunder, whether express or implied) or
otherwise, except as provided in Section 12.2. 

  

	12.2	Liquidated Damages Not Penalty. Because of the unique nature of the economic damages and losses that would be sustained under this Agreement where specified damages are used, it is difficult or impossible to
determine with precision the amount of damages that would or might be incurred by a non-breaching Party in such circumstances. Therefore, it is acknowledged and agreed by the Parties that in such circumstances: (a) it would be impracticable or
extremely difficult to fix the actual damages to a non-breaching Party resulting therefrom; (b) any sums that would be payable under this Agreement in such circumstances are stipulated by the Parties to be in the nature of liquidated damages
and not a penalty, and are acknowledged and agreed to be fair, reasonable and appropriate; (c) such payment represents a reasonable estimate of compensation for a portion of the losses that may reasonably be anticipated from such failure and
shall, without duplication, be the sole and exclusive measurement of monetary damages of such non-breaching Party with respect to such circumstances; and (d) if the breaching Party challenges the enforceability of such liquidated damages, the
non-breaching Party may elect at its option for damages in such circumstances to be based on actual damages instead of liquidated damages and such actual damages shall not be subject to the limitations set forth in Section 12.1.

  

	12.3	Exclusive Remedies. Notwithstanding anything to the contrary contained in this Agreement, from and after the Effective Date, this Agreement contains the Parties’ exclusive remedies against each other with
respect to the transactions contemplated hereby, including breaches of the representations, warranties, and agreements of the Parties contained in this Agreement or in any document delivered pursuant to this Agreement. 

ARTICLE XIII 

INSURANCE 
 During the Term,
(a) Seller shall acquire and carry property insurance to cover the loss of Ethylene prior to the delivery thereof to Buyer or any Third Party and Associated Co-Product while in Seller’s possession at any Plant, and (b) each Party
shall, for all risks and circumstances that should and may be covered by insurance in accordance with prudent industry practices, purchase and maintain sufficient casualty, environmental, and property insurance in order to satisfy the legal
liabilities for bodily injuries and damages to properties (including the properties of such Party) as a result of or in association with the performance of this Agreement and sufficient third party liability insurance and other insurance(s) required
by applicable Law and any Governmental Authority. 
 ARTICLE XIV 

CONFIDENTIALITY 
  

	14.1	 Information. Each of the Parties agrees that it will utilize any Confidential Information received from the other Party solely in connection
with the performance of its obligations 

  
 23 

	 	
hereunder and the exercise by the recipient Party of its rights and remedies hereunder and under applicable Law, and all such Confidential Information will be subject to and bound by the
provisions set forth in this Article XIV. Upon termination of this Agreement, the recipient Party shall return or destroy all such Confidential Information (and cease all further use and disclosure of such Confidential Information) that
has been provided to it, together with all reproductions thereof in the recipient Party’s possession; provided that the recipient Party shall have the right to retain copies of any such information and records that (a) were created by
automatic computer generated backup systems or (b) relate to its performance of any services and the exercise of its rights and remedies hereunder or under the Related Agreements and under applicable Law, and all such copies and the information
reflected thereon shall be subject to the first sentence of this Section 14.1 and to Section 14.2. 

  

	14.2	Definition. “Confidential Information” means any and all information (regardless of format or medium of exchange) that is disclosed by any disclosing Party or any Affiliate, employee or agent
thereof to the recipient Party or any Affiliate, employee or agent of the recipient Party in connection with the performance of this Agreement or the Related Agreements provided that Confidential Information shall not include any information that is
publicly known or independently developed by such recipient Party. It is further understood that each Party may have the opportunity as a result of proximity or close operational ties to observe or obtain Confidential Information of any other Party
and agrees not to divulge or use such information other than as set forth in this Article XIV. 

  

	14.3	Legal Requirement. If the recipient Party is legally required (by interrogatories, discovery requests for information or documents, subpoena, civil or criminal investigative demand or similar process) to disclose
any Confidential Information, it is agreed that the recipient Party prior to disclosure will use commercially reasonable efforts to provide the disclosing Party with prompt notice of such request(s) so that the disclosing Party may seek an
appropriate protective order or other appropriate remedy or waive the recipient Party’s compliance with this Article XIV. If such protective order or other remedy is not obtained, or the disclosing Party grants a waiver hereunder,
the recipient Party required to furnish Confidential Information may furnish that portion (and only that portion) of the Confidential Information which, in the opinion of such Party’s counsel, the recipient Party is legally compelled to
disclose, and the recipient Party will exercise commercially reasonable efforts to obtain reliable assurance that confidential treatment will be accorded any Confidential Information so furnished. Disclosure of Confidential Information by the
recipient Party shall not violate this Article XIV to the extent that the recipient Party (or its ultimate parent) in the exercise of reasonable good faith judgment deems it necessary, pursuant to law, regulation or stock exchange rule,
to disclose such information in or in connection with filings made with the U.S. Securities and Exchange Commission, any securities exchange upon which debt or equity securities of such recipient Party or its parent may be listed, to any
Governmental Authority or in presentations to lenders or ratings agencies. 

  

	14.4	Survival. The provisions of this Article XIV shall survive the termination of this Agreement for a period of three years following such termination. 

  
 24 

 ARTICLE XV 

ASSIGNMENT; CHANGE OF CONTROL 
  

	15.1	Assignment Generally. Each Party hereunder shall be entitled to assign all of its rights and obligations under this Agreement with the prior written consent of the other Party, in each case which consent shall
not be unreasonably withheld by the non-assigning Party; provided that any Buyer Party shall not be obligated to seek the consent of Seller to effect an assignment of its rights and interests under this Agreement in connection with a sale by a given
Buyer Party or its Affiliates of any Downstream Facilities, so long as the transferee (a) executes a written assumption of such Buyer Party’s obligations hereunder with respect to the rights or obligations assigned in a form reasonably
satisfactory to Seller and delivers such written assumption to Seller promptly after the effective date of such assignment, and (b) is, in Seller’s good faith determination, financially and operationally capable of fulfilling such
obligations so assigned and assumed. With respect to any such assignment of a Buyer Party’s rights and interests under this Agreement, the Parties shall execute and deliver additional documents and instruments and perform additional acts as may
be necessary or appropriate to give effect to such partial assignment. No assignment hereunder shall release the assigning Party from any of its obligations under this Agreement except to the extent expressly agreed in writing by each other Party.
Any purported assignment of this Agreement in violation of this Section 15.1 is null and void ab initio. 

  

	15.2	Assignment to Affiliates. Notwithstanding the foregoing, this Agreement may be assigned by a Party to an Affiliate (other than any other Party) without the consent of any other Party, provided that such
Affiliate executes an agreement satisfactory to each other Party, whereby the Affiliate assumes all of the applicable obligations of the assigning Party under this Agreement; provided further that the assigning Party shall not be released of
its obligations under this Agreement such that the assigning Party and its Affiliate shall be jointly and severally liable for the performance of the obligations of the assigning Party hereunder. 

ARTICLE XVI 
 TAXES

 During the Term, Seller shall be responsible for the payment of any sales, use, and excise taxes or any other tax, fee or charge due and levied by
any federal, state, local or other Governmental Authority on the Ethylene prior to each Delivery Point and for any taxes, fees or charges due as a result of Seller making Ethylene available to Buyer hereunder, except to the extent any such taxes
are, by applicable Law, required to be paid directly by Buyer, in which event such taxes shall be paid by Buyer and reimbursed by Seller, and Seller shall indemnify, defend and hold Buyer harmless from any liability against such taxes, fees or
charges. During the Term, Buyer shall be responsible for the payment of any taxes, fees or charges applicable to the Ethylene at or downstream of each Delivery Point and for taxes, fees and charges applicable to any products produced or manufactured
from the use of such Ethylene, except to the extent any such taxes are, by applicable Law, required to be paid directly by Seller, in which event such taxes shall be paid by Seller and reimbursed by Buyer, and Buyer shall indemnify, defend and hold
Seller harmless from any liability against such taxes, fees or charges. The above notwithstanding, Seller shall 

  
 25 

 
remain liable for and Buyer shall have no obligation to reimburse Seller for (a) any taxes imposed on or calculated based upon net profits, gross or net income, profit margin or gross
receipts of Seller, (b) any taxes measured by capital value or net worth of Seller; or (c) any ad valorem or personal property taxes on any Plant or the property of Seller. Any penalties or interest imposed by a taxing authority on either
Party due to failure to pass information by the other Party will be paid by the Party failing to pass along necessary tax notices. 

ARTICLE XVII 

MISCELLANEOUS 
  

	17.1	Several Liability of Buyer Parties. 

  

	 	(a)	The liability of each Buyer Party as among all Buyer Parties shall be several and not joint, and equal to one-third on the part of each Buyer Party (or such other fractions totaling 100% as may be notified in writing
from time to time by Buyer’s Representative); and 

  

	 	(b)	Any amounts that a Buyer Party fails to pay pursuant to Article IV shall remain the liability solely of such Buyer Party. Unless notified otherwise in writing by Buyer’s Representative, payments owing
hereunder by Buyer shall be made to Seller by each individual Buyer Party in accordance with such Buyer Party’s respective share of Buyer’s liability hereunder. 

 

	17.2	Choice of Law; Submission to Jurisdiction. This Agreement shall be subject to and governed by the laws of the State of Texas, excluding any conflicts-of-law rule or principle that might refer the construction or
interpretation of this Agreement to the laws of another state. Each of the Parties hereby agrees: (a) to submit to the exclusive jurisdiction of any state or federal court sitting in Houston, Texas for the enforcement of any arbitration
decision pursuant to Section 17.3, (b) that all claims in respect of any such action or proceeding may be heard and determined in any such court, (c) that such Party will not bring any action or proceeding arising out of or
relating to this Agreement in any other court, and (d) that such Party waives any defense of inconvenient forum to the maintenance of any such action or proceeding, and waives any bond, surety or other security that might be required of any
other Party with respect to any such action or proceeding. 

  

	17.3	Dispute Resolution. 

  

	 	(a)	The dispute resolution provisions set forth in this Section 17.3 shall be the final, binding and exclusive means to resolve all disputes, controversies or claims (each, a “dispute”) arising
under the Agreement, and EACH PARTY IRREVOCABLY WAIVES ANY RIGHT TO ANY TRIAL BY JURY WITH RESPECT TO ANY DISPUTE ARISING UNDER THIS AGREEMENT. 

  
 26 

	 	(b)	If a dispute arises, the following procedures shall be implemented: 

  

	 	(i)	Any Party may at any time invoke the dispute resolution procedures set forth in this Section 17.3 as to any dispute by providing written notice of such action to the other Parties. 

 

	 	(ii)	Notwithstanding the existence of any dispute or the pendency of any procedures pursuant to this Section 17.3, the Parties agree and undertake that all payments not in dispute shall continue to be made and
that all obligations not in dispute shall continue to be performed. 

  

	 	(iii)	Within 30 days after receipt of notice of a dispute under Section 17.3(b)(i), representatives of the Parties shall engage in non-binding mediation, and a specific timetable and completion date for its
implementation shall also be agreed upon. If the completion date therefor shall occur without the Parties having resolved the dispute, then the Parties shall proceed under Section 17.3(b)(iv). 

 

	 	(iv)	If, after satisfying the requirement above, the dispute is not resolved, the Parties shall resolve the dispute by a binding arbitration, to be held in the State of Texas pursuant to the Federal Arbitration Act and in
accordance with the then-prevailing Commercial Arbitration Rules of the American Arbitration Association (the “AAA”). The AAA shall select one arbitrator. Each Party shall bear its own expenses incurred in connection with
arbitration and the fees and expenses of the arbitrator shall be shared equally by the Parties involved in the dispute and advanced by them from time to time as required. It is the mutual intention and desire of the Parties that the arbitrator be
selected as expeditiously as possible following the submission of the dispute to arbitration. Once the arbitrator is selected and except as may otherwise be agreed in writing by the Parties involved in such dispute or as ordered by the arbitrator
upon substantial justification shown, the hearing for the dispute will be held within 60 days of submission of the dispute to arbitration. The arbitrator shall render his final award within 60 days, subject to extension by the arbitrator upon
substantial justification shown of extraordinary circumstances, following conclusion of the hearing and any required post hearing briefing or other proceedings ordered by the arbitrator. Any discovery in connection with arbitration hereunder shall
be limited to information directly relevant to the controversy or claim in arbitration. The decision of the arbitrator in any such proceeding will be reasoned, final and binding and final judgment may be entered upon such an award in any court of
competent jurisdiction, but entry of such judgment will not be required to make such award effective. Any action against any Party ancillary to arbitration (as determined by the arbitrator), including any action for provisional or conservatory
measures or action to enforce an arbitration award or any judgment entered by any court in respect of any thereof may be brought in any federal or state court of competent jurisdiction located within the State 

  
 27 

	 	
of Texas, and the Parties hereby irrevocably submit to the non-exclusive jurisdiction of any federal or state court located within the State of Texas over any such action. The Parties hereby
irrevocably waive, to the fullest extent permitted by Law, any objection which they may now or hereafter have to the laying of venue of any such action brought in such court or any defense of inconvenient forum for the maintenance of such action.
Each of the Parties agrees that a judgment in any such action may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. 

 

	 	(c)	The Parties agree that to the extent that there are two or more related disputes arising under (i) this Agreement, (ii) any guarantee issued pursuant to Section 6.5 or (iii) any letter of
credit issued pursuant to Section 6.5 (as between these Parties or the parties to such guarantee or letter of credit), then they consent to the consolidation of those disputes in circumstances where: 

 

	 	(i)	no arbitration is currently pending under (A) this Agreement, (B) any guarantee issued pursuant to Section 6.5 or (C) any letter of credit issued pursuant to Section 6.5; or

  

	 	(ii)	the tribunal in the first commenced arbitration (or the AAA where no tribunal has yet been constituted in either case) finds (having invited and allowed opportunity for submissions from all the parties to both
arbitrations) that it would be convenient and efficient to do so, having regard to the time and cost impact of consolidating the disputes into one proceeding. Such an application for consolidation must be brought prior to the constitution of a
tribunal in the second commenced arbitration in time, and should be resolved within one Month of the application being received by the relevant tribunal/the AAA. 

  

	17.4	Survival. Cancellation, expiration or termination of this Agreement shall not relieve the Parties of any obligations that, by their very nature, must survive said cancellation, expiration or termination,
including choice of law (Section 17.2), dispute resolution provisions (Section 17.3), limitations of liability (Article XII), confidentiality provisions (Article XIV), and defined terms and certain
miscellaneous provisions (Article I and Article XVII), all of which shall remain in effect until all rights, obligations and remedies have been finally extinguished, and all disputes under Section 17.3 have been
finally resolved. Notwithstanding the foregoing, the statute of limitations for bringing any action with respect to this Agreement or any Party’s performance hereunder is not extended by the provisions of this Section 17.4.

  

	17.5	 Buyer’s Representative. Buyer hereby appoints WPT LLC as Buyer’s representative (in such capacity, “Buyer’s
Representative”) for purposes of giving and receiving all notices, statements, and invoices under this Agreement by or to Buyer and serving as the primary contact with respect to certain operational matters as specified herein. Any notice,
statement, or invoice required or permitted to be delivered by Seller under this Agreement shall be deemed to have been delivered to Buyer upon delivery thereof to 

  
 28 

	 	
Buyer’s Representative. Any notice, election, or other action required or permitted of Buyer under this Agreement shall be binding upon Buyer when provided, made or taken by Buyer’s
Representative. No change in the identity of Buyer’s Representative shall be effective until Seller receives written notice from Buyer’s Representative of the change and the effective date thereof, which must be prospective.

  

	17.6	Notices. All notices, requests or consents provided for by, or permitted to be given pursuant to, this Agreement must be in writing and must be given by depositing same in the United States mail, addressed to the
Person to be notified, postpaid, and registered or certified with return receipt requested or by delivering such notice in person or by facsimile or e-mail to such Party. Notice given by personal delivery or mail shall be effective upon actual
receipt. Notice given by facsimile or e-mail shall be effective upon actual receipt if received during the recipient’s normal business hours or at the beginning of the recipient’s next Business Day after receipt if not received during the
recipient’s normal business hours. All notices to be sent to a Party pursuant to this Agreement shall be sent to or made at the address set forth below such Party’s signature to this Agreement or at such other address as such Party may
stipulate to the other Parties in the manner provided in this Section 17.6. 

 If to Seller: 

 
 If to Buyer: 

                    (in its capacity as
Buyer’s Representative) 
 With copies provided to each Buyer Party at the following address(es): 

 
  

	17.7	Entire Agreement. This Agreement and the Related Agreements (including any exhibits or schedules hereto or thereto) constitute the entire agreement of the Parties relating to the matters contained herein and
therein, superseding all prior contracts or agreements, whether oral or written, relating to the matters contained herein and therein. 

  

	17.8	Amendment or Modification. This Agreement may be amended or modified from time to time only by the written agreement of all the Parties hereto and each such written agreement shall be designated on its face an
“Amendment” or an “Addendum” to this Agreement. 

  

	17.9	Counterparts. This Agreement may be executed in any number of counterparts with the same effect as if all signatory parties had signed the same document. All counterparts shall be construed together and shall
constitute one and the same instrument. 

  

	17.10	Severability. If any provision of this Agreement shall be finally determined to be unenforceable, illegal or unlawful, such provision shall, so long as the economic and legal substance of the transactions
contemplated hereby is not affected in any materially adverse manner as to any Party, be deemed severed from this Agreement and the remainder of this Agreement shall remain in full force and effect. 

  
 29 

	17.11	Further Assurances. In connection with this Agreement and all transactions contemplated by this Agreement, each signatory party hereto agrees to execute and deliver such additional documents and instruments and
to perform such additional acts as may be necessary or appropriate to effectuate, carry out and perform all of the terms, provisions and conditions of this Agreement and all such transactions. 

 

	17.12	No Waiver. Failure of any Party to require performance of any provision of this Agreement shall not affect such Party’s right to full performance thereof at any time thereafter, and the waiver by any Party
of a breach of any provision hereof shall not constitute a waiver of any similar breach in the future or of any other breach or nullify the effectiveness of such provision. 

 

	17.13	Set Off. Each Party has the right to set off against any amounts due to the other Party hereunder any and all amounts that the other Party owes to the first Party under this Agreement or the Related Agreements.

  

	17.14	Rights of Third Parties. The provisions of this Agreement are enforceable solely by the Parties to this Agreement, and no third party shall have the right, separate and apart from the Parties to this Agreement,
to enforce any provision of this Agreement or to compel any Party to this Agreement to comply with the terms of this Agreement. 

  

	17.15	Legal Relationship. The Parties do not intend to create any sort of partnership, joint venture or any other legal entity by entering into or performing this Agreement. Each Party will perform its obligations
under this Agreement in its own name. Each Party will be solely responsible for its own acts and omissions (and the acts and omissions of its employees, consultants and other agents), and without the express written consent of each other Party, no
Party will have the authority nor will purport to act for, or legally bind, any other Party in any transaction. 

[Remainder of page intentionally left blank. Signature page follows.] 

  
 30 

 IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed and delivered by their duly authorized
representatives as of the date first set forth above. 
  

			
	SELLER:
	
	WESTLAKE CHEMICAL OPCO LP
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	BUYER:
	
	WPT LLC
		
	By:	 	Westlake Chemical Investments, Inc., its Manager
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE VINYLS, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	WESTLAKE PETROCHEMICALS LLC
		
	By:	 	Westlake Chemical Investments, Inc., its Manager
		
	By:	 	  

	Name:	 	
	Title:	 	

 Signature Page to Ethylene Sales Agreement 

 SCHEDULE 5.1 

PRICE 
  

					
	 Cost of Energy
 ($/lb)
	  	=	  	(i) the total cost ($) incurred by Seller during such Month (or such other period of time as the Parties may agree) (the “Period”) under the Services Agreement in connection with, as applicable, the purchase,
receipt, handling, storage, transportation, and delivery of Natural Gas, and similar costs (such costs as a function of the quantity (MMBtu) of Natural Gas used at the Plants during such Period ($/MMBtu)), divided by (ii) total actual
Ethylene produced at the Plants (lb) during such Period;
			
	Cost of Feedstock ($/lb)	  	=	  	(i) the total cost ($) incurred by Seller during such Period under the Feedstock Supply Agreement in connection with, as applicable, the purchase, receipt, handling, storage, transportation, and delivery of Ethane and Other
Feedstock (if any), and similar costs (such costs as a function of the quantity (lb) of Ethane and Other Feedstock (if any) used at the Plants during such Period ($/lb)), divided by (ii) total actual Ethylene produced at the Plants (lb)
during such Period;
			
	 Purge Gas Recovery
 ($/lb)
	  		  	(i) the quantity (lb) of Poly Purge during such Period, multiplied by (ii) the Price ($/lb) for the immediately preceding Month, divided by (iii) the total actual Ethylene (lb) produced at the Plants during such
Period;
			
	 All Other Cash Production Costs

($/lb)
	  	=	  	an amount determined in accordance with Section 5.2 of the Agreement;
			
	Prior Year Adjustment ($/lb)	  	=	  	an amount determined in accordance with Section 5.3 of the Agreement;
			
	 Co-Product Credit

($/lb)
	  	=	  	(i) the net proceeds realized by Seller from the sale of Associated Co-Product (after deducting transportation and related sales costs) during such Period, multiplied by (ii) the percentage of Seller’s total output of
Ethylene at the Plants actually purchased by Buyer during such Period calculated, in each case, on a weighted average basis for each Plant, divided by (iii) the quantity of Ethylene (in pounds) actually delivered to Buyer during such
Period;

  
 Schedule 5.1 

 SPECIFIC TERMS IN THIS EXHIBIT HAVE BEEN REDACTED BECAUSE CONFIDENTIAL TREATMENT OF THOSE TERMS HAS BEEN
REQUESTED. THE REDACTED MATERIAL HAS BEEN SEPARATELY SUBMITTED TO THE SECURITIES AND EXCHANGE COMMISSION, AND THE TERMS HAVE BEEN MARKED AT THE APPROPRIATE PLACE WITH THREE ASTERISKS (***). 

 

					
	 Energy Efficiency Adjuster (“EEA”) ($/lb)

(see notes below)
	  	=	  	 an amount determined in accordance with the following formulas:
  

			
		  		  	If Actual Energy is 90% or more of Benchmark Energy but less than 110% of Benchmark Energy, then EEA ($/lb) equals zero (i.e., no adjustment);
			
		  		  	 If Actual Energy is 110% or more of Benchmark Energy, then EEA ($/lb) equals:

 
 

			
		  		  	 If Actual Energy is less than 90% of Benchmark Energy, then EEA ($/lb) equals:

 
 

  
 Schedule 5.1 

 SPECIFIC TERMS IN THIS EXHIBIT HAVE BEEN REDACTED BECAUSE CONFIDENTIAL TREATMENT OF THOSE TERMS HAS BEEN
REQUESTED. THE REDACTED MATERIAL HAS BEEN SEPARATELY SUBMITTED TO THE SECURITIES AND EXCHANGE COMMISSION, AND THE TERMS HAVE BEEN MARKED AT THE APPROPRIATE PLACE WITH THREE ASTERISKS (***). 

 

					
	 Feedstock Efficiency Adjuster (“FEA”)

($/lb)
 (see notes below)
	  	:	  	 FEA is determined in accordance with the following formulas:
  

			
		  		  	If Actual Yield is equal to or greater than 95% of Benchmark Yield and less than 105% of Benchmark Yield, then FEA equals zero (i.e., no adjustment);
			
		  		  	 If Actual Yield is equal to or greater than 105% of Benchmark Yield, then FEA equals:

 
 

			
		  		  	 If Actual Yield is less than 95% of Benchmark Yield, then FEA equals:

 
 

			
	Natural Gas (MMBtu)	  	=	  	the total quantity (MMBtu) of Natural Gas consumed at the Plants in the production of Ethylene during such Period;
			
	 Ethane
 (lb)
	  	=	  	the total quantity (lb) of Ethane consumed at the Plants in the production of Ethylene during such Period;
			
	 Propane
 (lb)
	  	=	  	the total quantity (lb) of Propane consumed at the Plants in the production of Ethylene during such Period;
			
	Poly Purge (lb)	  	=	  	the total quantity (lb) of Poly Purge consumed at the Plants in the production of Ethylene during such Period;
			
	Ethylene Produced (lb)	  	=	  	the total quantity (lb) of Ethylene produced at the Plants during such Period as measured at the Metering Points;

  
 Schedule 5.1 

					
	Energy Consumed (MMBtu)	  	=	  	the total quantity (MMBtu) of Natural Gas delivered to the Plants during such Period, plus the total quantity (MMBtu) of internally generated fuel consumed at the Plants during such Period; and
			
	Feedstock Consumed (lb)	  	=	  	the total quantity (lb) of Ethane, Propane, Poly Purge and any Other Feedstock delivered to the Plants during such Period.

 Notes 
  

	 	•	 	If a Plant is undergoing shut-down or start-up activities in connection with a scheduled turnaround or expansion, EEA and FEA shall be zero with respect to such Plant for each Day such Plant is affected by such
activities. 

  

	 	•	 	Seller shall keep reasonably detailed records setting forth the Cost of Feedstock and the Cost in Energy for each Day during startup or shutdown at any Plant. 

 

	 	•	 	The Feedstock Efficiency Adjuster and the methodology used to determine the Feedstock Efficiency Adjuster shall be subject to change upon the agreement of the Parties. 

 

	 	•	 	The types of feedstock shall be subject to change at any time or from time to time upon the agreement of the Parties. In the event that a change in the type(s) of feedstock occurs, the Parties shall work together in
good faith to establish a mutually acceptable ratio for each such type of feedstock in a manner that is consistent with the Feedstock Efficiency Adjuster set forth herein. 

 

	 	•	 	Subject to Section 5.2(d)(iii), if there is a capital project that merits changing the Feedstock Efficiency Adjuster, then each Party shall consider in good faith any such changes as may be requested by the
other Party. 

  
 Schedule 5.1 

 SPECIFIC TERMS IN THIS EXHIBIT HAVE BEEN REDACTED BECAUSE CONFIDENTIAL TREATMENT OF THOSE TERMS HAS BEEN
REQUESTED. THE REDACTED MATERIAL HAS BEEN SEPARATELY SUBMITTED TO THE SECURITIES AND EXCHANGE COMMISSION, AND THE TERMS HAVE BEEN MARKED AT THE APPROPRIATE PLACE WITH THREE ASTERISKS (***). 

SCHEDULE 5.2 
 FIRST
CONTRACT YEAR 
 ALL OTHER CASH PRODUCTION COSTS 
  

											
	Cost Category	  	Cost ($)*	  	Cost ($/lb)*
	 Fixed Cash Conversion Costs
	  	 	 	***	 	  	 	 	***	 
	 Variable Cash Conversion Costs
	  	 	 	***	 	  	 	 	***	 
	 SG&A Expenses
	  	 	 	***	 	  	 	 	***	 
			
	Cost Category	  	Cost ($)**	  	Cost ($/lb)**
	 Maintenance Cost Reserves (Capital)
	  	 	 	***	 	  	 	 	***	 
	 Maintenance Cost Reserves (Expense)
	  	 	 	***	 	  	 	 	***	 
	 Turnaround Cost Reserves
	  	 	 	***	 	  	 	 	***	 

  

	*	Period covering July 1, 2014 through December 31, 2014. 

	**	Period covering July 1, 2014 through December 31, 2014 and the Contract Years beginning January 1, 2015 and ending December 31, 2018. 

  
 Schedule 5.2 

 SCHEDULE 7.1 

SPECIFICATIONS 

Ethylene Specifications – Lake Charles Plants 
  

													
	 Attribute
	  	 	 	 	 	  	 	 	 	 
	 Ethylene
	  				 	min.	  	 	99.90	% 	 	vol %
	 Methane / Ethane
	  				 	max.	  	 	962	  	 	ppm
	 Acetylene
	  				 	max.	  	 	2.0	  	 	ppm
	 C3 and Heavier
	  				 	max.	  	 	10	  	 	ppm
	 Oxygen
	  	 	(1	) 	 	max.	  	 	2.0	  	 	ppm
	 Carbon Monoxide (CO)
	  				 	max.	  	 	1.0	  	 	ppm
	 Carbon Dioxide (CO2)
	  				 	max.	  	 	3.0	  	 	ppm
	 Hydrogen
	  	 	(1	) 	 	max.	  	 	5	  	 	ppm
	 Sulfur (as H2S)
	  	 	(2	) 	 	max.	  	 	1	  	 	ppm wt
	 Water
	  	 	(1	) 	 	max.	  	 	1	  	 	ppm wt
	 Methanol
	  				 	max.	  	 	1	  	 	ppm
	 Total Carbonyls
	  	 	(3	) 	 	max.	  	 	1	  	 	(4)(a) ppm
	 Ammonia
	  	 	(3	) 	 	max.	  	 	0.5	  	 	ppm wt
	 Dienes
	  	 	(2	) 	 	max.	  	 	5	  	 	ppm
	 Total Alcohols
	  				 	max.	  	 	1	  	 	(4)(b) ppm
	 C3 through C6’s
	  	 	(3	) 	 	max.	  	 	6.7	  	 	ppm
	 C7’s and Heavier
	  	 	(3	) 	 	max.	  	 	15.2	  	 	ppm

  

	*	All specification on mol/vol% basis unless noted (mol% and vol% are identical for these purposes (gas analyses)) 

All analyses taken daily as a minimum except as noted below: 
  

	(1)	Online Analyzer (continuous) 

  

	(2)	Verified minimum of annually 

  

	(3)	Upon request 

  

	(4)	To be analyzed quarterly or upon request by customer 

  

	(a)	includes, as a minimum, acetone 

  

	(b)	includes, as a minimum, methanol and propanol 

  
 Schedule 7.1 

 Ethylene Specifications – Calvert City Plant 

 

									
	 Attribute
	  	 	  	 	 	 	 
	 Ethylene
	  	min.	  	 	98.6	% 	 	mol %
	 Methane
	  	max.	  	 	300	  	 	ppmw
	 Ethane
	  	max.	  	 	10,000	  	 	ppmw
	 Acetylene
	  	max.	  	 	100	  	 	ppmw

  

	*	All analyses taken continually by online analyzer 

  
 Schedule 7.1

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