• BEAR VALLEY COMMUNITY SERVICES DISTRICT
• BIODEGRADABLE PRODUCTS INSTITUTE
• CALIFORNIA BAG AND FILM ALLIANCE
• CALIFORNIA BICYCLE COALITION
• CALIFORNIA COGENERATION COUNCIL
• CALIFORNIA CONCRETE CONTRACTORS ASSOCIATION
• CALIFORNIA FILM EXTRUDERS & CONVERTERS ASSOCIATION
• Californians for Extended Product Responsibility
• CALIFORNIA LARGE ENERGY CONSUMERS ASSOCIATION
• CALIFORNIA NEVADA CEMENT ASSOCIATION
• CALIFORNIA PARK & RECREATION SOCIETY
• CALIFORNIA PRECAST CONCRETE ASSOCIATION
• CALPORTLAND COMPANY
• CEMEX INC.
• CHEVRON CORPORATION AND ITS SUBSIDIARIES
• EAST BAY REGIONAL PARK DISTRICT
• GENERAL DYNAMICS - NASSCO
• HERITAGE BAG COMPANY
• CITY OF INDIO
• KAWEAH RIVER ROCK COMPANY INC.
• KENSINGTON POLICE PROTECTION AND COMMUNITY SERVICES DISTRICT
• LEHIGH SOUTHWEST CEMENT COMPANY
• CITY OF LONG BEACH
• COUNTY OF LOS ANGELES
• METABOLIX, INC.
• MITSUBISHI CEMENT CORPORATION
• NATIONAL CEMENT COMPANY OF CALIFORNIA
• NORTH LAKE TAHOE RESORT ASSOCIATION
• NORTH TAHOE FIRE PROTECTION DISTRICT
• Onsite Power Systems, Inc.
• PACIFIC RIM DRYWALL ASSOCIATION
• PACTIV
• Plastimin LLC
• RIO TINTO MINERALS INC.
• CITY OF SANGER
• CITY OF SOUTH LAKE TAHOE
• SOUTHGATE RECREATION & PARK DISTRICT
• STALLION SPRINGS COMMUNITY SERVICES DISTRICT
• CITY OF STOCKTON DEPARTMENT OF PARKS AND RECREATION
• SUNRUN, INC.
• TAHOE CITY PUBLIC UTILITY DISTRICT
• TESORO REFINING & MARKETING COMPANY
• TEXAS INDUSTRIES INC.
• U.S. BORAX INC.
• WESTERN HOME FURNISHINGS ASSOCIATION