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        Core Value: Quality & Continuous Improvement

        Core Value: Quality & Continuous Improvement

        Our commitment to quality products is so strong that it is symbolized through the two check marks that make up the "W" in our logo. We seek to maintain this commitment through an intensive practice of "never-ending process of improvement".


        Several of Westlake's operations which produce petrochemicals, plastics, and chlor/alkali & derivatives products have earned the prestigious ISO 9001certification. ISO certification signifies that a company has an ongoing program of continual quality improvement and satisfies customer requirements. ISO 9001:2015 certification indicates that Westlake's production facilities meet rigid quality standards, demand supplier performance, and are committed to continual improvement in order to meet the needs of customers.

        Westlake Chemical operations with ISO 9001 certification include the following:

        (Click on location below to view certificate)


        Axiall Canada Inc., a Westlake company, Beauharnois, Canada (English)

        Axiall Canada, Inc., a Westlake company, Beauharnois, Canada (French)

        Westlake Aberdeen, Gallman, Madison & Prairie (ISO 14001) MS

        Westlake Aberdeen MS

        Westlake Chemical Lake Charles South Plant LA

        Westlake Chemical Natrium WV

        Westlake Chemical Op-Co Lake Charles LA

        Westlake Chemical Plaquemine LA

        Westlake Gallman, Madison & Prairie MS

        Westlake Geismar LA

        Westlake Longview TX

        Westlake Polymers Sulphur LA

        Westlake Styrene Sulphur LA

        Westlake Vinyls, Inc. and/or Westlake Chemical OpCo: LP, Calvert City KY

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