ARCO Pipe Line Company

ARCO Products Company

ARCO Terminal Services Corp.

BP Company

Brenntag

Chevron Pipe Line Company

Chicap Pipe Line Company

Clean Energy

Cook Inlet Pipeline Company

ConocoPhillips Refinery

ConocoPhillips Transportation Co.

ExxonMobil Pipeline Company

Four Corners Pipeline Company

GATX Terminals Corp.

Harbor Cogeneration Company

Irvine Ranch Water District.

Kinder Morgan Energy Partners L.P.

Los Angeles County Sanitation District

Plains All American Pipeline

Plains Exploration & Production

Rhodia Chemical Co.

Rio Tinto (US Borax)

Sempra Energy Company

Shell Pipeline Corp.

Southern California Gas Co.

Tesoro Refining & Marketing Co.

Tosco Distribution Company

Tosco Refining Company

THUMS Long Beach Co.

Unocal Pipeline Company

Unocal Refining & Marketing

Valero Wilmington Refinery

Vopak Inc.

Westways Terminal Company

76 Products Company

Mobil Chemical Company