| ZXEO |
ZymaX envirotechnology, San Luis Obispo, CA |
| ZFSL |
Zymax Forensic, San Luis Obispo, CA |
| ZALB |
Zalco Laboratories, Inc., Bakersfield, CA |
| WSLH |
Wisconsin State Laboratory of Hygiene, Madison, WI |
| WQLW |
San Jose Creek Water Quality Laboratory, Whittier, CA |
| WQLC |
JWPCP Water Quality Laboratory, Carson, CA |
| WPEL |
City of LA Dept. Water & Power Environ. Lab, Los Angeles, CA |
| WLIC |
Weck Laboratories, Inc., City of Industry, CA |
| WLGA |
W. L. Gore and Associates, Inc., Elkton, MD |
| WETS |
Western Environmental Testing Lab, Sparks, NV |
| WCSO |
Watt Construction, Sherman Oaks, CA |
| WCAS |
West Coast Analytical Services, Inc., Santa Fe Springs, CA |
| WBWQ |
West Basin Water Quality Laboratory, El Segundo, CA |
| WALC |
Western Analytical Laboratories, Inc., Chino, CA |
| VLLV |
Veritas Laboratories, Las Vegas, NV |
| VALE |
Vista Analytical Laboratories, El Dorado Hills, CA |
| USCE |
Univ. of Southern California, Dept of Earth Sci., Los Angeles, CA |
| UNAK |
Native Village of Unalakleet, Unalakleet, AK |
| UCDL |
UC Davis Wastewater Treatment Plant Laboratory, Davis, CA |
| TTSA |
Tahoe-Truckee Sanitation Agency, Truckee, CA |
| TSIW |
ToxScan, Inc., Watsonville, CA |
| TRID |
Triangle Laboratories, Inc., Durham, NC |
| TLM |
Torrent Laboratory, Milpitas, CA |
| TLIT |
Turner Laboratories, Inc., Tucson, AZ |
| TLF |
Twining Labs, Fresno, CA |
| TGGB |
TEG, Solana Beach, CA |
| TEI |
Terracon, Irvine, CA |
| TEGR |
TEG Northern California, Inc., Rancho Cordova, CA |
| TDLT |
Truesdail Laboratories, Inc., Tustin, CA |
| TAWW |
TestAmerica ,Watertown, WI |
| TAWS |
Eurofins Environment Testing Northern California, LLC – West Sacramento, CA |
| TAUP |
TestAmerica, University Park, IL |
| TATW |
TestAmerica, Tacoma, WA |
| TASW |
TestAmerica, Seattle, WA |
| TASP |
TestAmerica , Spokane, WA |
| TASG |
TestAmerica, Savannah, GA |
| TASF |
TestAmerica, San Francisco, CA |
| TASC |
TestAmerica, Sacramento, CA |
| TARW |
TestAmerica, Richland, WA |
| TAPO |
TestAmerica, Portland, OR |
| TAPA |
TestAmerica, Phoenix, AZ |
| TAP |
TestAmerica, Pleasanton, CA |
| TAOF |
TestAmerica, Orlando, FL |
| TAOC |
TestAmerica, Ontario, CA |
| TANC |
TestAmerica, North Canton, OH |
| TAN |
TestAmerica, Nashville, TN |
| TAMC |
TestAmerica, Morgan Hill, CA |
| TALA |
TestAmerica, Los Angeles, CA |
| TAKT |
TestAmerica, Knoxville, TN |
| TAKP |
TestAmerica, King of Prussia, PA |
| TAIC |
TestAmerica, Irvine, CA |
| TAHT |
TestAmerica, Houston, TX |
| TAEM |
TestAmerica, Earth City, MO |
| TADO |
TestAmerica , Dayton, OH |
| TADC |
TestAmerica, Denver, CO |
| TACO |
TestAmerica ASL, Corvallis, OR |
| TACI |
TestAmerica, Cedar Falls, IA |
| TACC |
TestAmerica, Colorado Springs, CO |
| TABV |
TestAmerica, Burlington, VT |
| TABN |
TestAmerica, Buffalo, NY |
| TABI |
TestAmerica, Buffalo Grove, IL |
| TAAT |
TestAmerica, Austin, TX |
| TAAA |
TestAmerica, Anchorage, AK |
| SWRI |
Southwest Resarch Institute, San Antonio, TX |
| SWLB |
Southwest Laboratory, Broken Arrow, OK |
| SWAA |
Shannon & Wilson, Inc., Anchorage, AK |
| STUD |
South Tahoe Public Utility District, South Lake Tahoe, CA |
| STSM |
Southland Technical Services, Inc., Montebello, CA |
| STSF |
Severn Trent Laboratories, San Francisco, CA |
| STLZ |
Severn Trent Laboratories, Corpus Christi, TX |
| STLY |
Severn Trent Laboratories, Whippany, NJ |
| STLX |
Severn Trent Laboratories, Tampa, FL (Savannah) |
| STLW |
Severn Trent Laboratories, Westfield, MA |
| STLV |
Severn Trent Laboratories, Valparaiso, IN |
| STLU |
Severn Trent Laboratories, University Park, IL |
| STLT |
Severn Trent Laboratories, Austin, TX (Quanterra) |
| STLS |
STL Sacramento, West Sacramento, CA |
| STLR |
Severn Trent Laboratories, Richland, WA |
| STLQ |
Severn Trent Laboratories, Amherst, NY |
| STLP |
STL Pittsburgh, Pittsburgh, PA |
| STLO |
Severn Trent Laboratories, Mobile, AL |
| STLM |
Severn Trent Laboratories, Monroe, CT |
| STLL |
Severn Trent Laboratories, Earth City, MO |
| STLK |
STL Knoxville, Knoxville, TN |
| STLJ |
Severn Trent Laboratories, N. Billerica, MA |
| STLI |
Severn Trent Laboratories, Pensacola, FL |
| STLH |
Severn Trent Laboratories, Houston, TX |
| STLG |
Severn Trent Laboratories, Savannah, GA |
| STLF |
Severn Trent Laboratories, Tampa, FL |
| STLE |
Severn Trent Laboratories, Tallahassee, FL |
| STLD |
Severn Trent Laboratories, Austin, TX |
| STLC |
Severn Trent Laboratories, North Canton, OH |
| STLB |
Severn Trent Laboratories, Sparks, MD |
| STL9 |
Severn Trent Laboratories, Inc., Chicago, IL |
| STL8 |
STL Seattle, Seattle, WA |
| STL6 |
Severn Trent Laboratories, Colchester, VT |
| STL5 |
Severn Trent Laboratories, Newburgh, NY |
| STL4 |
Severn Trent Laboratories, Miramar, FL |
| STL3 |
STL Los Angeles, Santa Ana, CA |
| STL2 |
Severn Trent Laboratories, Edison, NJ |