| STLS |
STL Sacramento, West Sacramento, CA |
| STSM |
Southland Technical Services, Inc., Montebello, CA |
| STUD |
South Tahoe Public Utility District, South Lake Tahoe, CA |
| SWAA |
Shannon & Wilson, Inc., Anchorage, AK |
| SWLB |
Southwest Laboratory, Broken Arrow, OK |
| SWRI |
Southwest Resarch Institute, San Antonio, TX |
| TAWS |
Eurofins Environment Testing Northern California, LLC – West Sacramento, CA |
| TDLT |
Truesdail Laboratories, Inc., Tustin, CA |
| TEGR |
TEG Northern California, Inc., Rancho Cordova, CA |
| TEI |
Terracon, Irvine, CA |
| TGGB |
TEG, Solana Beach, CA |
| TLF |
Twining Labs, Fresno, CA |
| TLIT |
Turner Laboratories, Inc., Tucson, AZ |
| TLM |
Torrent Laboratory, Milpitas, CA |
| TRID |
Triangle Laboratories, Inc., Durham, NC |
| TSIW |
ToxScan, Inc., Watsonville, CA |
| TTSA |
Tahoe-Truckee Sanitation Agency, Truckee, CA |
| UCDL |
UC Davis Wastewater Treatment Plant Laboratory, Davis, CA |
| UNAK |
Native Village of Unalakleet, Unalakleet, AK |
| USCE |
Univ. of Southern California, Dept of Earth Sci., Los Angeles, CA |
| VALE |
Vista Analytical Laboratories, El Dorado Hills, CA |
| VLLV |
Veritas Laboratories, Las Vegas, NV |
| WALC |
Western Analytical Laboratories, Inc., Chino, CA |
| WBWQ |
West Basin Water Quality Laboratory, El Segundo, CA |
| WCAS |
West Coast Analytical Services, Inc., Santa Fe Springs, CA |
| WCSO |
Watt Construction, Sherman Oaks, CA |
| WETS |
Western Environmental Testing Lab, Sparks, NV |
| WLGA |
W. L. Gore and Associates, Inc., Elkton, MD |
| WLIC |
Weck Laboratories, Inc., City of Industry, CA |
| WPEL |
City of LA Dept. Water & Power Environ. Lab, Los Angeles, CA |
| WQLC |
JWPCP Water Quality Laboratory, Carson, CA |
| WQLW |
San Jose Creek Water Quality Laboratory, Whittier, CA |
| WSLH |
Wisconsin State Laboratory of Hygiene, Madison, WI |
| ZALB |
Zalco Laboratories, Inc., Bakersfield, CA |
| ZFSL |
Zymax Forensic, San Luis Obispo, CA |
| ZXEO |
ZymaX envirotechnology, San Luis Obispo, CA |