| General Dynamics (Nassco) | San Diego | 47.8k |
| Valero Refining Co-Cali Fornia Benicia Refinery | Benicia | 15.5k |
| Equilon Carson Terminal | Carson | 9.0k |
| Martinez Refining Co Llc | Martinez | 8.2k |
| Silgan Container Manufacturing Corp. | Riverbank | 7.9k |
| Chevron Products Co Richmond Refinery | Richmond | 6.1k |
| Chevron Products Co. Div Of Chevron Usa Inc. | El Segundo | 5.4k |
| Bluescope Coated Products Llc | Rancho Cucamonga | 4.9k |
| Tesoro Refining & Marketing Co Llc | Martinez | 4.6k |
| Torrance Refining Co Llc | Torrance | 4.2k |
| Phillips 66 Los Angeles Refinery Wilmington Plant | Wilmington | 3.2k |
| Phillips 66 Rodeo Renewable Energy Complex | Rodeo | 3.1k |
| Nusil Technology Llc | Bakersfield | 2.1k |
| Kern Energy | Bakersfield | 2.0k |
| Arlon Graphics Llc | Placentia | 1.8k |
| Sonoco Metal Packaging Llc | Oakdale | 1.6k |
| Lockheed Martin Aeronautics Co | Palmdale | 1.4k |
| Olympus Terminals Llc | Carson | 1.4k |
| Phillips 66 Los Angeles Refinery Carson Plant | Carson | 1.3k |
| Silgan Containers Mfg Corp | Antioch | 1.3k |
| Armtec Defense Technologies | Coachella | 1.2k |
| Sherwin-Williams Co | Victorville | 1.0k |
| Nick Barbieri Trucking Llc | Santa Rosa | 1.0k |
| American Polymers Corp Dba Polycoat Products | Santa Fe Springs | 962 |
| Ultramar Inc Wilmington Refinery | Wilmington | 890 |
| Arcadia Inc. | Vernon | 878 |
| Tesoro East Hynes Terminal | Long Beach | 850 |
| Chevron Huntington Beach Terminal | Huntington Beach | 797 |
| Equilon Mormon Island Terminal | Wilmington | 705 |
| Tesoro Marine Terminal 2 | Long Beach | 664 |
| Corteva Agriscience Llc | Pittsburg | 613 |
| Southern Counties Oil Co. Lp D.b.a. Sc Fuels | Oxnard | 558 |
| Phillips 66 Richmond Terminal | Richmond | 498 |
| Tesoro - Vinvale Terminal | South Gate | 410 |
| Univar Solutions Usa Inc. | Commerce | 392 |
| Phillips 66 Los Angeles Terminal | Los Angeles | 337 |
| Tesoro Hathaway Terminal | Signal Hill | 320 |
| Kawneer Co Inc | Visalia | 318 |
| Engineered Polymer Solutions Inc | City Of Commerce | 271 |
| Tesoro - Colton Terminal | Bloomington | 260 |
| Equilon San Jose Terminal | San Jose | 259 |
| P.f.i. Inc | Santa Fe Springs | 250 |
| Air Products Manufacturing Llc | Paramount | 249 |
| Catalina Utilities Center | Avalon | 245 |
| Silgan Containers Mfg Corp | Sacramento | 233 |
| Oakley Inc | Foothill Ranch | 210 |
| Tesoro - Stockton Terminal | Stockton | 205 |
| Baker Petrolite | Bakersfield | 195 |
| Prc-Desoto International Inc. | Mojave | 192 |
| Phillips 66 Los Angeles Refinery Marine Terminal | Wilmington | 185 |
| Olympus Terminals Llc | Long Beach | 164 |
| Becker Specialty Corp | Fontana | 158 |
| Petrodiamond Terminal Co | Long Beach | 154 |
| Evonik Corp | Los Angeles | 153 |
| Nusil Technology Llc | Carpinteria | 138 |
| Dura Coat Products Inc (Axalta Coating Systems) | Riverside | 135 |
| Tesoro - San Diego Terminal | San Diego | 130 |
| Stewart Filmscreen Corp | Torrance | 120 |
| Univar Solutions Usa | Fairfield | 102 |
| A.g. Layne Inc. | Los Angeles | 71 |
| Continental Coatings Co. Inc | Fontana | 52 |
| Lunday-Thagard Co Dba World Oil Refining | South Gate | 51 |
| 3m Co - Monrovia Tape | Monrovia | 48 |
| Valero Wilmington Asphalt Plant | Wilmington | 45 |
| Chevron Richmond Technology Center | Richmond | 34 |
| Bakersfield Renewable Fuels Llc - Areas 1 & 2 | Bakersfield | 23 |
| Univar Solutions Carson Ca | Carson | 20 |
| Demennokerdoon Dba World Oil Recycling | Compton | 19 |
| Veolia Es Technical Solutions L.l.c. | Azusa | 10 |
| Military Ocean Terminal Concord | Concord | 10 |
| Hill Brothers Chemical Co | City Of Industry | 5 |
| Steelscape Llc | Rancho Cucamonga | 4 |
| Solvay Usa Inc | Long Beach | 4 |
| Laird Coatings Corp | Huntington Beach | 3 |
| Foster Farms Collier Complex | Delhi | 0 |
| Amber Chemical Inc. | Bakersfield | 0 |
| San Joaquin Refining Co Inc | Bakersfield | 0 |
| Southern Counties Oil Co. Lp D.b.a. Sc Fuels | Modesto | 0 |
| U.s Army Sierra Army Depot | Herlong | 0 |
| The Jankovich Co San Pedro Fixed Facility | San Pedro | 0 |
| Moc Products Co. Inc | Pacoima | 0 |
| The Jankovich Co Paramount Fixed Facility | Paramount | 0 |
| Norman Fox & Co | Vernon | 0 |
| Brenntag Pacific Inc | Santa Fe Springs | 0 |