| STLW |
Severn Trent Laboratories, Westfield, MA |
| STLY |
Severn Trent Laboratories, Whippany, NJ |
| SGSW |
SGS Environmental Services Inc., Wilmington, NC |
| SGSL |
SGS Michigan Division, Ludington, MI |
| SGSA |
SGS North America, Inc., Anchorage, AK |
| SWAA |
Shannon & Wilson, Inc., Anchorage, AK |
| SALR |
Shasta Analytical Laboratory, Inc., Redding, CA |
| SHLH |
Sherwood Labs Corporation, Hilmar, CA |
| SIRL |
Sierra Analytical Labs, Inc., Laguna Hills, CA |
| SEMS |
Sierra Environmental Monitoring, Sparks, NV |
| STEH |
Sierra Testing Lab, El Dorado Hills, CA |
| SSLV |
Silver State Analytical Laboratories, Inc., Las Vegas, NV |
| SIGO |
SiREM, Guelph, Ontario, Canada |
| SCLW |
Soil Control Lab, Watsonville, CA |
| SAS |
Sound Analytical Services, Inc., Tacoma, WA |
| STUD |
South Tahoe Public Utility District, South Lake Tahoe, CA |
| SCST |
Southern California Soil & Testing, Inc., San Diego, CA |
| STSM |
Southland Technical Services, Inc., Montebello, CA |
| SWLB |
Southwest Laboratory, Broken Arrow, OK |
| SWRI |
Southwest Resarch Institute, San Antonio, TX |
| STIS |
Sparger Technology, Inc., Sacramento, CA |
| SPEC |
Spectra Laboratory, Inc., Tacoma, WA |
| SPLH |
SPL Houston Laboratory, Houston, TX |
| SPLL |
SPL Lafayette Laboratory, Scott, LA |
| SPLM |
SPL Michigan Laboratory, Traverse City, MI |
| SILD |
Stable Isotope Laboratory - UC Davis, Davis, CA |
| SLMP |
Stanford Linear Accelerator Center, Menlo Park, CA |
| SAFW |
Star Analytical, Fort Worth, TX |
| STCL |
STL ChromaLab, Inc., Pleasanton, CA |
| STLK |
STL Knoxville, Knoxville, TN |
| STL3 |
STL Los Angeles, Santa Ana, CA |
| STLP |
STL Pittsburgh, Pittsburgh, PA |
| STLS |
STL Sacramento, West Sacramento, CA |
| STL8 |
STL Seattle, Seattle, WA |
| SETO |
Summit Environmental Technologies, Inc.,Cuyahoga Falls, OH |
| SSLE |
SunStar Laboratories, Inc., Encinitas, CA |
| SSLS |
SunStar Laboratories, Inc., Lake Forest, CA |
| SSLT |
SunStar Laboratories, Inc., Tustin, CA |
| TTSA |
Tahoe-Truckee Sanitation Agency, Truckee, CA |
| TEGR |
TEG Northern California, Inc., Rancho Cordova, CA |
| TGGB |
TEG, Solana Beach, CA |
| TEI |
Terracon, Irvine, CA |
| TADO |
TestAmerica , Dayton, OH |
| TASP |
TestAmerica , Spokane, WA |
| TAWW |
TestAmerica ,Watertown, WI |
| TACO |
TestAmerica ASL, Corvallis, OR |
| TAAA |
TestAmerica, Anchorage, AK |
| TAAT |
TestAmerica, Austin, TX |
| TABI |
TestAmerica, Buffalo Grove, IL |
| TABN |
TestAmerica, Buffalo, NY |
| TABV |
TestAmerica, Burlington, VT |
| TACI |
TestAmerica, Cedar Falls, IA |
| TACC |
TestAmerica, Colorado Springs, CO |
| TADC |
TestAmerica, Denver, CO |
| TAEM |
TestAmerica, Earth City, MO |
| TAHT |
TestAmerica, Houston, TX |
| TAIC |
TestAmerica, Irvine, CA |
| TAKP |
TestAmerica, King of Prussia, PA |
| TAKT |
TestAmerica, Knoxville, TN |
| TALA |
TestAmerica, Los Angeles, CA |
| TAMC |
TestAmerica, Morgan Hill, CA |
| TAN |
TestAmerica, Nashville, TN |
| TANC |
TestAmerica, North Canton, OH |
| TAOC |
TestAmerica, Ontario, CA |
| TAOF |
TestAmerica, Orlando, FL |
| TAPA |
TestAmerica, Phoenix, AZ |
| TAP |
TestAmerica, Pleasanton, CA |
| TAPO |
TestAmerica, Portland, OR |
| TARW |
TestAmerica, Richland, WA |
| TASC |
TestAmerica, Sacramento, CA |
| TASF |
TestAmerica, San Francisco, CA |
| TASG |
TestAmerica, Savannah, GA |
| TASW |
TestAmerica, Seattle, WA |
| TATW |
TestAmerica, Tacoma, WA |
| TAUP |
TestAmerica, University Park, IL |
| TLM |
Torrent Laboratory, Milpitas, CA |
| TSIW |
ToxScan, Inc., Watsonville, CA |
| TRID |
Triangle Laboratories, Inc., Durham, NC |
| TDLT |
Truesdail Laboratories, Inc., Tustin, CA |
| TLIT |
Turner Laboratories, Inc., Tucson, AZ |
| TLF |
Twining Labs, Fresno, CA |
| EPA9 |
U.S. Environmental Protection Agency, Region 9 Lab, Richmond, CA |
| UCDL |
UC Davis Wastewater Treatment Plant Laboratory, Davis, CA |
| USCE |
Univ. of Southern California, Dept of Earth Sci., Los Angeles, CA |
| VLLV |
Veritas Laboratories, Las Vegas, NV |
| VALE |
Vista Analytical Laboratories, El Dorado Hills, CA |
| WLGA |
W. L. Gore and Associates, Inc., Elkton, MD |
| WCSO |
Watt Construction, Sherman Oaks, CA |
| WLIC |
Weck Laboratories, Inc., City of Industry, CA |
| WBWQ |
West Basin Water Quality Laboratory, El Segundo, CA |
| WCAS |
West Coast Analytical Services, Inc., Santa Fe Springs, CA |
| WALC |
Western Analytical Laboratories, Inc., Chino, CA |
| WETS |
Western Environmental Testing Lab, Sparks, NV |
| WSLH |
Wisconsin State Laboratory of Hygiene, Madison, WI |
| ZALB |
Zalco Laboratories, Inc., Bakersfield, CA |
| ZXEO |
ZymaX envirotechnology, San Luis Obispo, CA |
| ZFSL |
Zymax Forensic, San Luis Obispo, CA |