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US Locations Where GCI Has Provided Service

Map of Facilities

          
     National Cement
        Bravo Energy
        Cemex Corp

 █    Holcim Inc.
        Ecova Corp.

 █    Lone Star Industries
        Vista Chemical
        Holcim Inc.
        TXI
        North Texas Cement
        Regulatory Offices
        Shell Corp
        USPCI
        Cemex Corp.

 █    Lafarge Corp.
        Heartland Cement
        Ash Grove Corp.
        Regulatory Offices

 █    Ash Grove Corp.

 █    Dacotah Cement

 █    Lafarge Corp.
        Holcim Inc.

 █    Lafarge Corp  Cemex

 █    Lafarge Corp Cemex
     Ash Grove Corp.
        Regulatory Offices
        Continental Cement
        Holcim Inc.
        River Cement
        Lone Star Industries

     Ash Grove Corp.
        Regulatory Offices

     National Cement
        Holcim Inc.
        Regulatory Offices

     Cemex Corp.

     Cemex Corp.

     Safety-Kleen Corp.
        Portland Cement Assn.
        Chemical Waste Mgmt.
        Medusa Cement
        Lone Star Industries
        Regulatory Offices

     Hydrite Corp.

     Regulatory Offices
        St. Lawrence Cement

     Cemex Corp.
        Riverton Investment Corp
     Rhone-Poulenc
        Lone Star Industries
        Regulatory Offices
        Cemex Corp.
        ERAtech
        Regulatory Offices

     North Texas Cement
        CKRC
        Regulatory Offices

     Triangle Labs
        Regulatory Offices

     Safety-Kleen Corp.
        Holcim, Inc.
        General Engineering Labs

     Cemex Corp.

     Holcim Inc.

     Holcim Inc.
        Regulatory Offices

     Holcim Inc.

     Holcim Inc.

     Holcim Inc.

     St. Lawrence Cement