AMOCO CHEMICAL COMPANY

ARCHER ROAD ANIMAL HOSPITAL

AUSTIN INDUSTRIAL, INC

BAY AREA SHOOTING CLUB, INC.

BAYTOWN SUN

BOC GASES

CERAMIC COOLING TOWER

CHEVRON CHEMICAL COMPANY

CIBA-GIEGY

CITGO PETROLEUM CORPORATION

CITY OF BAYTOWN, TEXAS

CITY OF MOUNT BELVIEU, TEXAS

CONOCO, INC.

COOK CONSTRUCTION

CRESTMONT CONSTRUCTION

DYNEGY MIDSTREAM OPERATIONS

ECOLOCHEM, INC

ENGINEERED CARBONS, INC.

ENICHEM ELASTOMERS U.S.A.

ENTERGY GULF STATES, INC

ENTERPRISE PRODUCTS

EXXON BASIC CHEMICAL TECHNOLOGY

EXXON BAYTOWN OLEFINS PLANT

EXXON CHEMICAL AMERICAS

EXXON PLASTICS

EXXON RESEARCH AND DEVELOPMENT LABORATORIES

EXXON RESEARCH AND ENGINEERING

FINA OIL & CHEMICAL COMPANY

FINA OIL AND CHEMICAL COMPANY

HALTERMANN LTD

HAZELWOOD ENTERPRISES, INC.

HERRINGTON EQUIPMENT

HOECHST CELANESE

HUNTSMAN CHEMICAL CORPORATION

HUTTON CONSTRUCTION

JINDAL UNITED STEEL CORPORATION

KOCH SERVICES, INC.

LAREFORMA CIVIC ASSOCIATION

LEE COLLEGE

LODESTAR LOGISTICS CORPORATION

MERICHEM

MHMRA

MOBIL CHEMICAL COMPANY

MONTGOMERY TANK LINES

NASA-JOHNSON SPACE CENTER

NES RENTAL

NOVARTIS CROP PROTECTION, INC

OCCIDENTAL CHEMICAL CORPORATION

PLACID REFINERY COMPANY

PRAXAIR, INC.

QUANTUM CHEMICAL CORPORATION

R&R RENTALS

RUBICON, INC.

SCHNEIDER INTERNATIONAL

SHELL CHEMICAL COMPANY

SHELL OIL REFINERY

SOLVAY POLYMERS

STAR ENTERPRISE

STATE OF LOUISIANA, BATON ROUGE

SYNGENTA CROP PROTECTION, INC.

TEXACO CHEMICAL COMPANY

TEXAS ELECTRIC EQUIPMENT COMPANY, LTD

TEXAS OLEFINS

UNITED PARCEL SERVICE

UNOCAL CORPORATION

VALERO REFINING - HOUSTON

VALERO REFINING - TEXAS CITY

WARREN PETROLEUM COMPANY

ZAVAL - TEX