| TTRV |
Tetra Tech, Inc., Irvine, CA |
| TTSA |
Tahoe-Truckee Sanitation Agency, Truckee, CA |
| TTSB |
Tetra Tech, Inc., San Bernardino, CA |
| TTSD |
Tetra Tech EM, Inc., San Diego, CA |
| TTSF |
Tetra Tech EM, Inc., San Francisco, CA |
| TTSP |
Tetra Tech, Inc., Saint Paul, MN |
| TVA |
Terra Vac, Anaheim, CA |
| TVC |
Terra Vac, Concord, CA |
| TVCT |
The Verde Companies, Tempe, AZ |
| TVSD |
Trevet, San Diego, CA |
| TWC |
Texas Water Commission, Austin, TX |
| TWIC |
Tide Water, Inc., Carlsbad, CA |
| TWPC |
Trancas Water Pollution Control Plant (WPCP), Malibu, CA |
| TWPT |
Tulare Water Pollution Control , Tulare, CA |
| TWRK |
Treadwell & Rollo, Oakland, CA |
| TWRO |
Treadwell & Rollo, Orinda, CA |
| UALF |
United Air Lines, South San Francisco, CA |
| UAO |
Uribe and Associates, Oakland, CA |
| UBTL |
Utah Biomedical Testing Lab, UT |
| UCBC |
University of California, Berkeley, Berkeley, CA |
| UCDU |
UC Davis Utilities, Davis, CA |
| UCED |
UC Davis - EH&S, Davis, CA |
| UEB |
Universal Environmental, Benicia, CA |
| UEC |
Upgradient Environmental, Cameron Park, CA |
| UES |
Upgradient Environmental, Stockton, CA |
| UGAV |
Urban Geology, Inc., Aliso Viejo,CA |
| UIH |
Ultramar, Inc., Hanford, CA |
| UNAK |
Native Village of Unalakleet, Unalakleet, AK |
| UNCG |
UNC Geotech, Grand Junction, CO |
| UOK |
University of Oklahoma, OK |
| UPSL |
United Parcel Service, Laguna Hills, CA |
| UPSV |
United Parcel Service, Van Nuys, CA |
| USB |
Rio Tinto US Borax, Boron, CA |
| USBR |
U.S. Bureau of Reclamation, Boulder City, NV |
| USBS |
U.S. Bureau of Reclamation, Sacramento, CA |
| USCG |
U.S. Coast Guard, San Pedro, CA |
| USEI |
Ultrasystems Environmental, Irvine, CA |
| USFM |
USFilter, Milpitas, CA |
| USMI |
US Mine Corp, Ione, CA |
| USNM |
Department of the Navy, Pt. Mugu, CA |
| USRS |
Universal Service Recycling, Stockton, CA |
| UTCS |
United Technologies Corp., San Jose, CA |
| UURI |
University of Utah Research Institute, UT |
| VBAW |
Van Brunt Associates, Walnut Creek, CA |
| VCPW |
Van Waters & Rogers, Commerce, CA |
| VCT |
Ventura County Public Works Agency, Ventura, CA |
| VECC |
Varco Environmental Consulting, Chula Vista, CA |
| VEFE |
Versar, Inc., Fair Oaks, CA |
| VEFN |
Vironex Environmental Field Services, El Segundo, CA |
| VEGV |
Vector Engineering, Grass Valley, CA |
| VEID |
Veridian Environmental Inc., Davis, CA |
| VEIR |
VEIR Corp., Environmental Management Services, Bakersfield, CA |
| VENM |
Vaquero Energy, Monterey, CA |
| VERT |
VERTEX, Irvine, CA |
| VETS |
Vapor Extraction Technology, Inc., San Clemente, CA |
| VGM |
USA Waste Services, Valencia, CA |
| VIA |
Versar, Inc., Alameda, CA |
| VIFO |
Verde Corporation, Tempe, AZ |
| VISD |
Vistainfo, San Diego, CA |
| VISV |
Versar, Inc., Springfield, VA |
| VMEE |
Vinje and Middleton Engineering, Inc., Escondido, CA |
| VMP |
Vulcan Materials L.F., Pleasanton, CA |
| VNAH |
Veolia North America, Hollister, CA |
| VNAL |
Veolia North America, Lathrop, CA |
| VNAR |
Veolia North America, Rio Vista, CA |
| VNAS |
Veolia North America, Santa Paula, CA |
| VNSD |
Veolia North America, San Diego, CA |
| VRIR |
VESTRA Resources, Inc., Redding, CA |
| VRSD |
Ventura Regional Sanitation District, Ventura, CA |
| VRSS |
Vironex Environmental Field Services, Newark, DE |
| VSDI |
Valley Sanitary District, Indio, CA |
| VSFC |
Vallejo Sanitation & Flood Control, Vallejo, CA |
| VTIG |
VT Industries, Gardena, CA |
| VTSA |
Vironex Technical Services LLC, Santa Ana, CA |
| VVWR |
Victor Valley Wastewater Reclamation Authority, Victorville, CA |
| VWNA |
Veolia Water North America, Atwater, CA |
| VWRC |
Van Waters & Rogers, Seattle, WA |
| VWRS |
ValleyGeo, Madera, CA |
| WAAV |
West and Associates, Vacaville, CA |
| WACD |
W. A. Craig, Inc., Dixon, CA |
| WAE |
Weiss Associates, Emeryville, CA |
| WAL |
Winefield & Associates, Long Beach, CA |
| WBWQ |
West Basin Water Quality Laboratory, El Segundo, CA |
| WCCC |
Westwater Consulting, Inc., Centennial, CO |
| WCCR |
W. Contra Costa Sanitary Landfill, Richmond, CA |
| WCEV |
West Coast Environmental and Engineering, Ventura, CA |
| WCGC |
Weaver Consultants Group, LLC, Centennial, CO |
| WCSF |
Woodard & Curran, San Francisco, CA |
| WCSO |
Watt Construction, Sherman Oaks, CA |
| WCWC |
City of Woodland, Woodland, CA |
| WDCD |
Warren Duncan Contracting, Devore, CA |
| WEC |
Willbanks Environmental Consulting, Inc., Clovis, CA |
| WECC |
Weis Environmental LLC, Carlsbad, CA |
| WECO |
Western Environmental Engineers, Co., Santa Ana, CA |
| WEGS |
Watterson Environmental Group, Sylvania, OH |
| WEIA |
Waterstone Environmental, Inc., Anaheim, CA |
| WEIS |
Wood Environment & Infrastructure Solutions, Inc., Commerce, CA |
| WESL |
Westmark Environmental Services, Inc., Las Vegas, NV |
| WESS |
WEST Environmental Services and Technology, San Rafael, CA |
| WEST |
Wright Environmental Services, Inc., Tracy, CA |