| TTD |
Tetra Tech EM, Inc., Denver, CO |
| TTDB |
Tetra Tech BAS, Diamond Bar, CA |
| TTEC |
Tetra Tech EC, Inc., San Diego, CA |
| TTI |
Tetra Tech, Inc., Pasadena, CA |
| TTIB |
Tetra Tech, Inc., Bellevue, WA |
| TTIS |
Tetra Tech, Inc., Santa Barbara, CA |
| TTIV |
Tank Team, Inc., Ventura, CA |
| TTMT |
Tetra Tech EM, Inc., Mountlake Terrace, WA |
| 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 |
| 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 |
| URSA |
URS Corporation, Anchorage, AK |
| URSB |
URS Corporation, Santa Barbara, CA |
| URSC |
URS Corporation, Seattle, WA |
| URSD |
URS Corporation, San Diego, CA |
| URSE |
URS Corporation, El Segundo, CA |
| URSF |
URS Corporation, San Francisco, CA |
| URSG |
URS Corporation, Chico, CA |
| URSH |
URS Corporation, Honolulu, HI |
| URSJ |
URS Corporation, San Jose, CA |
| URSL |
URS Corporation, Los Angeles, CA |
| URSM |
URS Corporation, Sacramento, CA |
| URSN |
URS Corporation, Salem, NH |
| URSO |
URS Corporation, Oakland, CA |
| URSP |
URS Corporation, Phoenix, AZ |
| URSR |
URS Corporation, Fresno, CA |
| URSS |
URS Corporation, Santa Ana, CA |
| URSU |
URS Corporation, Rancho Cucamonga, 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 |