| 4SRW |
Olivenhain Municipal Water District's 4S Ranch Water Reclamation Facility (WRF), San Diego, CA |
| AAAL |
Ami Adini & Associates, Inc., Los Angeles, CA |
| AAC |
American Analytics, Chatsworth, CA |
| AAMN |
Anteris Agronomics, Minden, NV |
| AARS |
Advanced Assessment and Remediation Services, Concord, CA |
| AAVL |
Adverus, Inc., Lafayette, CA |
| ABB |
ABB Environmental Services Inc., Portland, ME |
| ABCM |
Al Bay Construction Co., Martinez, CA |
| ABGB |
Applied Biogenics, Bell, CA |
| ABGN |
AB Geoscience and Environmental Consultants, Newport Beach, CA |
| ABRF |
ABR, Inc., Fairbanks, AK |
| ACAB |
Ash Creek Associates, Beaverton, OR |
| ACAM |
Andrew Craig & Associates, Marina Del Rey, CA |
| ACBS |
Abalone Coast Analytical, Inc., San Luis Obispo, CA |
| ACCO |
ACC Environmental Consultants, Inc., Oakland, CA |
| ACDS |
All Chemical Disposal, San Jose, CA |
| ACEH |
AllCal Environmental, Hayward, CA |
| ACET |
AllCal Environmental, Twain Harte, CA |
| ACGV |
Analytical Consulting Group, Inc., Ventura, CA |
| ACJV |
AES-Cape Joint Venture, LLC, Virginia Beach, VA |
| ACSD |
Applied Consultants, San Diego, CA |
| ACSF |
Ambiente Consulting, San Francisco, CA |
| ACSP |
AC/S Environmental Security, Camp Pendleton, CA |
| ACSV |
Aquatic Consulting Services, Ventura, CA |
| ACUT |
Advanced CleanUp Tech, Benicia, CA |
| ACWD |
Alameda County Water District, Fremont, CA |
| ACWH |
Assessco, Woodland Hills, CA |
| ADAN |
Adanta, Inc., Napa, CA |
| ADCM |
Advisian - A Worley Group, Costa Mesa, CA |
| ADEG |
Ardent Environmental Group, Inc., Corona, CA |
| ADLA |
Advisian, Los Angeles, CA |
| ADLI |
Arthur D. Little, Inc., Irvine, CA |
| ADPC |
Armtec Defense Product Company, Coachella, CA |
| ADPM |
Aquarius Drilling and Pumps, Merced, CA |
| ADRS |
ADR Environmental Group, Sacramento, CA |
| ADS |
Abbott Diagnostics, Santa Clara, CA |
| ADVT |
AdvTech Environmental, Inc., Brea, CA |
| ADW |
Arizona Department of Water Resources, AZ |
| AEA |
Advantage Environmental, Alpine, CA |
| AEAA |
AECOM, Inc., Anchorage, AK |
| AEAF |
Aquatic & Environmental Applications, Fremont, CA |
| AEAM |
Azure Environmental, Amherst, MA |
| AEC |
Alpha Environmental, Chatsworth, CA |
| AECB |
Advanced Environmental Concepts, Inc., Bakersfield, CA |
| AECC |
Andersen Environmental, Culver City, CA |
| AECF |
AECOM, Fresno, CA |
| AECI |
Aman Environmental Construction, Inc. |
| AECO |
AECOM, Inc., Sacramento, CA |
| AECS |
AECOM Technical Services, Inc., Sacramento, CA |
| AECT |
AJAY Environmental Consultants, Tucson, AZ |
| AEEI |
Atlas Environmental Engineering, Inc., Huntington Beach, CA |
| AEER |
AMEC Earth & Environmental, San Rafael, CA |
| AEFC |
Azure Environmental, Fairfax, CA |
| AEGA |
AMNAT Environmental & Geotechnical, Anaheim, CA |
| AEGC |
Alisto Engineering Group, Chula Vista, CA |
| AEGI |
Applied Engineering and Geology, Inc., Lincoln, CA |
| AEGL |
Alisto Engineering Group, Lafayette, CA |
| AEGP |
Alisto Engineering Group, Portland, OR |
| AEGW |
Alisto Engineering, Walnut Creek, CA |
| AEHA |
Army Environmental Hygiene Agency (AEHA), APG, MD |
| AEI |
Ambler Exploration, Inc., Anchorage, AK |
| AEII |
Avocet Environmental, Inc. , Irvine, CA |
| AEIL |
AEI Consultants, Lafayette, CA |
| AEIP |
Amador Engineering & Infrastructure, Inc., Pleasanton, CA |
| AEIS |
Accord Engineering, Inc., Santa Ana, CA |
| AEIT |
AEI Consultants, Torrance, CA |
| AEJS |
Aerojet, Sacramento, CA |
| AEL |
All Environmental, Inc., Lafayette, CA |
| AELA |
Andersen Environmental, Los Angeles, CA |
| AELB |
Alta Environmental, Long Beach, CA |
| AEMB |
All Environmental, Manhattan Beach, CA |
| AEMC |
American Environmental Management Corp., Rancho Cordova, CA |
| AEO |
Arctos Environmental, Oakland, CA |
| AEOA |
AECOM, Oakland, CA |
| AEOR |
AECOM Technical Services, Inc., Orange, CA |
| AEPB |
Applied Earth Science, Pompano Beach, FL |
| AEPR |
Artesian Environmental, Pt. Richmond, CA |
| AERC |
ALTA EM, Inc, Rancho Cucamonga, CA |
| AERO |
Aerostar SES LLC, Oak Ridge, TN |
| AESA |
Applied Earth Sciences, Inc., Austin, TX |
| AESC |
Advanced Environmental Services, Corte Madera, CA |
| AESE |
A.E. Schmidt Environmental, Van Nuys, CA |
| AESF |
Amari Environmental Consulting, San Francisco, CA |
| AESI |
Ambassador Environmental Services, Irvine, CA |
| AESJ |
AECOM Technical Services, Inc., San Jose, CA |
| AESM |
Advantage Environmental Consultants, LLC, San Marcos, CA |
| AESP |
Athanor Environmental Services, Pasadena, CA |
| AESS |
Atlas Engineering Services, Inc., Santa Cruz, CA |
| AESV |
Allied Environmental Services, Van Nuys, CA |
| AESW |
Allied Environmental Services West, San Rafael, CA |
| AETB |
American Environmental Testing Laboratory, Inc., Burbank, CA |
| AETV |
Applied Environmental Technologies, Inc., Ventura, CA |
| AFV |
ARTMN, Inc., Fountain Valley, CA |
| AGCH |
Augeas Corporation, Half Moon Bay, CA |
| AGCS |
Augeas Corporation, Santa Cruz, CA |
| AGE |
Anton Geological, Elk, CA |
| AGEA |
Advanced GeoEnvironmental, Inc., Anaheim, CA |
| AGES |
Advanced GeoEnvironmental, Stockton, CA |
| AGIA |
Allwest Geoscience, Inc., Anaheim, CA |
| AGII |
Applied Geosciences, Inc., Irvine, CA |