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GCI Client List

Ash Grove Cement Company

Continental Cement Company, LLC

Alumax (Now a part of Alcoa)

Kleen Industrial Services, Inc.

ChemRight Laboratories, Inc.
Shell Corp.

ERAtech, Inc.

Holcim Inc.

Independent Cement Corporation

Lafarge Corporation

Lone Star Industries Inc.

Medusa Cement Company

National Cement Company Inc.

Portland Cement Association

Redland Aggregates Ltd.

Rhodia Inc.

Safety-Kleen Corporation

Southdown Inc.

St. Lawrence Cement Inc.

Systech Environmental Corporation

Texas Industries Inc.

Waste Management International