| NGR |
Northrop-Grumman, Rosamond, CA |
| NESC |
NorthShore Engineering, Inc., Carlsbad, CA |
| NERM |
Northstar Environmental Remediation, Mission Viejo, CA |
| NSRR |
Northstate Recycling, Redding, CA |
| NWLA |
Northwest Airlines (LAX) , Los Angeles, CA |
| NEIS |
Northwest Envirocon, Inc., Sacramento, CA |
| NRWW |
Northwest Regional Wastewater (WW) System, Clearlake, CA |
| NSDN |
Novato Sanitary District, Novato, CA |
| NSNH |
NSN Engineering Inc., Hermosa Beach, CA |
| NUS |
NUS Corporation, Pittsburgh, PA |
| NV5 |
NV5, San Diego, CA |
| OEA |
O E Associates, Arroyo Grande, CA |
| OGEE |
O&G Environmnetal, Englewood, CO |
| OBGC |
O'Brien & Gere Engineers, Inc., Campbell, CA |
| OBG |
O'Brien & Gere Engineers, Inc., Syracuse, NY |
| OHM |
O. H. Materials Corporation, Findlay, OH |
| OHWT |
Oak Hills Wastewater Treatment Plant (California American Water), Salinas, CA |
| OASI |
OASIS Environmental, Inc., Anchorage, AK |
| OASA |
Oasis, Auburn, CA |
| OEO |
Obert Einevoll, Oakley, CA |
| OBEL |
Ocean Blue Engineers, Inc., Los Angeles, CA |
| OELA |
Odic Environmental, Inc., Los Angeles, CA |
| OBES |
Ofiaro Building & Engineering, San Rafael, CA |
| OEER |
Ogden Environmental & Energy, San Rafael, CA |
| OCP |
Oil Changers, Pleasanton, CA |
| OSCA |
Oil Spill Consultants, Inc., Anchorage, AK |
| OECS |
Oilfield Environmental and Compliance, Santa Maria, CA |
| OVSD |
Ojai Valley Sanitary District, Ventura, CA |
| OKDH |
Oklahoma Department of Health, OK |
| OWRB |
Oklahoma Water Resource Board, OK |
| OPUD |
Olivehurst Public Utility District (PUD), Olivehurst, CA |
| 4SRW |
Olivenhain Municipal Water District's 4S Ranch Water Reclamation Facility (WRF), San Diego, CA |
| OLST |
Olson Plumbing and Well Drilling, Turlock, CA |
| OEMP |
OMEGA Environmental Management, Inc., Petaluma, CA |
| OTIE |
Oneida Total Integrated Enterprises, Ventura, CA |
| OEIR |
OnSite Environmental, Inc., Redmond, WA |
| OTCC |
Optimal Technology, Thousand Oaks, CA |
| OCWD |
Orange County Water District, Fountain Valley, CA |
| OELB |
Orion Environmental, Inc., Long Beach, CA |
| OLPO |
Oroville Landfill Properties, Oroville, CA |
| ODIE |
Orton Development, Inc., Emeryville, CA |
| OLAE |
Oscar Larson & Associates, Eureka, CA |
| OLIO |
Oscar Lehnus, Inc., Oakland, CA |
| OCCA |
Osterberg and Carroll, CA |
| OSM |
Osterberg and Stewart, Modesto, CA |
| OSTB |
Osterberg Brothers, CA |
| OWDS |
Otay Water District, Spring Valley, CA |
| OTGO |
OTG Enviroengineering Solutions, Inc., Oakland, CA |
| PDCO |
P&D Consultants, Orange, CA |
| PDEO |
P&D Environmental, Oakland, CA |
| PACR |
Pace Analytical Services, Inc., Redding, CA |
| PAIE |
Pacific Affiliates, Inc., Eureka, CA |
| PCAS |
Pacific Coast Analytical Services, Sylmar, CA |
| PCEW |
Pacific Crest Engineering Inc., Watsonville, CA |
| PEEL |
Pacific Edge Engineering, Inc., Lake Forest, CA |
| PESM |
Pacific Engineering, Santa Maria, CA |
| PEGJ |
Pacific Environmental Group, San Jose, CA |
| PGES |
Pacific Gas & Electric Co., San Ramon, CA |
| PGEM |
Pacific Gas & Electric Company, Moss Landing, CA |
| PGSA |
Pacific Geoscience, San Anselmo, CA |
| POCT |
Pacific Oil Company, Tarzana, CA |
| PPB |
Pacific Petrochemical, Benicia, CA |
| PRGH |
Pacific Rim Geological, Hollister, CA |
| PSED |
Pacific States Environmental Contractors, Dublin, CA |
| PPO |
Paco Pumps, Oakland, CA |
| PRLP |
PacRL Corporation, Port Hueneme, CA |
| PRLV |
PacRL Corporation, Ventura, CA |
| PASS |
Padre Associates, Inc., Sacramento, CA |
| PAV |
Padre Associates, Ventura, CA |
| PRSM |
Paloma Environmental Services, Inc., Rancho Santa Margarita, CA |
| PANL |
Panacea, Inc., La Mirada, CA |
| PESI |
Pangea Environmental Services, Inc., Oakland, CA |
| PESW |
Paragon Environmental Services, Inc., E. Walpole, MA |
| PMB |
Parametrix, Bellevue, WA |
| PPAB |
Paramount Petroleum, Alon Bakersfield Refinery, Bakersfield, CA |
| PESP |
Parker Environmental Services, Pittsburg, CA |
| PWES |
Parrat & Wolff, Inc., East Syracuse, NY |
| PESO |
Parsons Engineering Science, Oakland, CA |
| PARP |
Parsons, Pasadena, CA |
| PARS |
Parsons, San Luis Obispo, CA |
| PESR |
Partner Engineering & Science, Inc., Roseville, CA |
| PESE |
Partner Engineering and Science, Inc., El Segundo, CA |
| PCL |
Pat-Chem Laboratories, Moorpark, CA |
| PFPO |
Path Forward Partners, Inc., Oakland, CA |
| PHWC |
Patrick Hamilton, West Covina, CA |
| PCPR |
Patten Construction, Paso Robles, CA |
| PAAM |
Patton and Associates, Moorpark, CA |
| PVDN |
Paug-Vik Development Corp., Naknek, AK |
| PCRL |
PCR Laboratories, San Marcos, CA |
| PDMS |
PDM Strocal, Stockton, CA |
| PSJC |
Peak Environmental Services, San Juan Capistrano, CA |
| PGS |
Pegasus Geoscience, Sanata Clara, CA |
| PBP |
Penryn Beacon, Penryn, CA |
| PELB |
PEnterprise, Long Beach, CA |
| PERA |
PERC Water Corporation, Avalon, CA |
| PERC |
PERC Water, Adelanto, CA |
| PFOR |
Perma-Fix, Oak Ridge, TN |
| PLW |
Perry Laboratory, Watsonville, CA |
| PRLB |
Perry Laboratory, Watsonville, CA |
| PESN |
PES Environmental, Inc., Novato, CA |