- Narmada Cement Company Limited, India
- Dubai Aluminum Co., Ltd.,
United Arab Emirates
- Pakistan Agricultural Research
Council, Pakistan
- Saurashtra Cement Limited, India
- Jakedan Cement Limited, Pakistan
- India Atomic Energy Commission, India
- Aluminum De Grece, Greece
- Sormas Sorgut, Turkey
- Conoco Refinery, United Kingdom
- Saudi Arabian Ministry of Petroleum and Mineral Resources, Saudi
Arabia
- Cementros Trabolia, Yugoslavia
- Contratista Obras Mineras y Construccion, Mexico
- Micronesian Mineral Resource Company, Ltd., Vancouver, BC
- Pacific Ventures, Inc. Northern Mariana Islands
- Seasonial Chemical and Fertilizer, Western Samoa
- Mobil Oil Mariana Islands, Inc., Guam
- Mobil Oil Micronesia, Inc. Saipan
- Tyree Environmental, Guam
- Marianas Cleaners, Saipan
- Construction Material Supply, Saipan
- Environmental Planning, Inc., Saipan
- Voice of America, Tinian
- MicroAur Development, Yap, FSM
- Asiana Airlines, Seoul, Korea
- Scottish Environmental Protection Agency
- Pacific Far East Minerals, China
- Phelps Dodge Exploration, Inc., Brasil
- Cyprus Amax Minerals Company, Brasil
- Golden Star Resources, Brasil
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- Tuolumne County Dept. of Public Works, Sonora, California
- Turlock Irrigation District, Turlock, California
- City and County of San Francisco, California
- Del-Tech, Knights Ferry, California
- Mobil Oil Corporation, Seal Beach, California
- Diel, Steinheimer, Riggio, Haydel & Mordaunt, Stockton,
California
- Whistle Stop Property, Jamestown, California
- Mariposa Shell, Mariposa, California
- Sierra-at-Tahoe Property, South Tahoe, California
- Mobil Land Development Corporation. Parker, Colorado
- National Bank of Kuwait, Vernnon Hills, Illinois
- J.D. Morrison Exxon, Sonora,
California
- Crabb Property, Modesto, California
- Centenial Materials, Franktown,
Colorado
- Mariposa County Dept. of Public Works, Mariposa, California
- Bureau of Reclamation, Denver, Colorado
- Bureau of Land Management
- National Park Service
- U.S. Environmental Protection Agency
- Union Minere Mines,
Platoro, Colorado
- Booker Trust, Sonora, California
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