| AAC |
American Analytics, Chatsworth, CA |
| ALTC |
Alta Analytical Lab Inc., El Dorado Hills, CA |
| ALSH |
ALS Laboratory Group, Houston, TX |
| ALGS |
ALS LAB GROUP, Simi Valley, CA |
| ALGR |
ALS LAB GROUP, Rochester, NY |
| ALGK |
ALS LAB GROUP, Kelso, WA |
| ALGJ |
ALS LAB GROUP, Jacksonville, FL |
| ALSF |
ALS LAB GROUP, Fort Collins, CO |
| ALSS |
ALS Environmental, Salt Lake City, UT |
| ASC2 |
Alpha Scientific Corporation, Cerritos, CA |
| AAWM |
Alpha Analytical, Westborough, MA |
| AAMM |
Alpha Analytical, Mansfield, MA |
| ALPS |
Alpha Analytical, Inc., Sparks, NV |
| ALPU |
Alpha Analytical Laboratories, Ukiah, CA |
| ACWD |
Alameda County Water District, Fremont, CA |
| ATOX |
Air Toxics LTD, Folsom, CA |
| ATLC |
Air Technology Laboratories, City of Industry, CA |
| APPL |
Agriculture & Priority Pollutants Laboratories, Fresno, CA |
| AGQL |
AGQ LABS, Oxnard, CA |
| AGLC |
Ag Laboratory & Consulting, Santa Maria, CA |
| ATLP |
Aerotech Laboratory, Inc., Phoenix, AZ |
| AVTS |
Advanced Technology Laboratories, Signal Hill, CA |
| ATLL |
Advanced Technology Laboratories , Las Vegas, NV |
| ACZ |
ACZ Laboratories, Steamboat Springs, CO |
| ACET |
ACE Laboratories, Inc., Thousand Oaks, CA |
| ACTO |
Accutest Southeast, Orlando, FL |
| ANCS |
Accutest Northern California, San Jose, CA |
| ACTM |
Accutest New England, Marlborough, MA |
| ACTD |
Accutest Mid-Atlantic, Dayton, NJ |
| ACTH |
Accutest Gulfcoast, Houston, TX |
| ALID |
AccuLabs, Inc., Davis, CA |
| ALIC |
AccuLabs, Inc., City of Industry, CA |
| ABCP |
ABC Environmental Laboratories, Pico Rivera, CA |
| ACBS |
Abalone Coast Analytical, Inc., San Luis Obispo, CA |
| ALWM |
A&L Western Laboratories, Inc., Modesto, CA |
| ARLO |
A & R Laboratories, Ontario, CA |