| GIGardner-fields, INC. Facility #13 | Tacoma | — | ◇ UNVERIFIED |
| GCGranite Construction Company Omak | Okanogan | — | ◇ UNVERIFIED |
| ILInternational Lubricants INC | Seattle | — | ◇ UNVERIFIED |
| LILakeside Industries Aberdeen | Aberdeen | — | ◇ UNVERIFIED |
| LILakeside Industries Issaquah 032 | Issaquah | — | ◇ UNVERIFIED |
| LILakeside Industries Little Monroe | Monroe | — | ◇ UNVERIFIED |
| LILakeside Industries Olympia Airport | Olympia | — | ◇ UNVERIFIED |
| LILavinal INC | Cle Elum | — | ◇ UNVERIFIED |
| LLLloyd Logging Mack Lloyd Pit | Winthrop | — | ◇ UNVERIFIED |
| LBLP Body Shop INC | Yakima | — | ◇ UNVERIFIED |
| MVMarine Vacuum Service, INC. | Seattle | — | ◇ UNVERIFIED |
| MTMitchell Trucking and Paving Mitchell | Orondo | — | ◇ UNVERIFIED |
| NYNewport Yacht Basin | Bellevue | — | ◇ UNVERIFIED |
| NCNorth Central Construction | Moses Lake | — | ◇ UNVERIFIED |
| OROil Re Refining CO INC - Kennewick Facility | Kennewick | — | ◇ UNVERIFIED |
| PAPoe Asphalt Paving INC. | Spokane | — | ◇ UNVERIFIED |
| RCRoadway Construction | Tacoma | — | ◇ UNVERIFIED |
| SISecon, Inc./stansteel 3000 | Bellevue | — | ◇ UNVERIFIED |
| SLSemmaterials LP Spokane | Spokane | — | ◇ UNVERIFIED |
| TITreoil Industries | Ferndale | — | ◇ UNVERIFIED |
| WAWatson Asphalt Paving CO INC | Kanaskat | — | ◇ UNVERIFIED |
| WAWatson Asphalt Paving CO INC | Redmond | — | ◇ UNVERIFIED |
| WBWhatcom Builders INC | Bellingham | — | ◇ UNVERIFIED |
| WAWoodworth and Company INC | Lakewood | — | ◇ UNVERIFIED |
| AAAlmond Asphalt, LLC | Kennewick | — | ◐ LIKELY ACTIVE |
| BMBardahl Manufacturing Corporation | Seattle | 20–99 | ◐ LIKELY ACTIVE |
| CDCpm Development Corporation | Spokane Valley | — | ◐ LIKELY ACTIVE |
| ESEmerald Services Inc 76ETO | Tacoma | 20–99 | ◐ LIKELY ACTIVE |
| FCFerry County Fuel and Oil, LLP | Republic | — | ◐ LIKELY ACTIVE |
| KOKent's Oil Service dba Albina Asphalt | Vancouver | 20–99 | ◐ LIKELY ACTIVE |
| PRPABCO Roofing - Tacoma | Tacoma | 100–499 | ◐ LIKELY ACTIVE |
| WFWhite Falcon Transport LLC | Okanogan | — | ◐ LIKELY ACTIVE |
| 2G2000 Gencor Plant | Spokane | — | ◇ UNVERIFIED |
| AAAlbina Asphalt Vancouver Ice & Fuel | Vancouver | — | ◇ UNVERIFIED |
| AHAlbina Holdings LLC 1200 W 8th St | Vancouver | — | ◇ UNVERIFIED |
| APAmerican Petroleum Environmental Svcs | Puyallup | — | ◇ UNVERIFIED |
| ATAmerican Tar Site | Seattle | — | ◇ UNVERIFIED |
| ANAsphalt Northwest, LLC | Lynden | — | ◇ UNVERIFIED |
| BCBp Cherry Point Refinery Final Effluent Integrity Management Project - Phase 3 | Blaine | — | ◇ UNVERIFIED |
| CICadman INC North Bend | North Bend | — | ◇ UNVERIFIED |
| CRColumbia Ready Mix Parker | Parker | — | ◇ UNVERIFIED |
| CDCpm Development CORP Recycle Crush | Yakima | — | ◇ UNVERIFIED |
| CDCpm Development Perry Quarry | Spokane | — | ◇ UNVERIFIED |
| EPErgon Pasco | Pasco | — | ◇ UNVERIFIED |
| GCGranite Construction CO Selah Ac Plant | Yakima | — | ◇ UNVERIFIED |
| HSHelena Sand & Gravel Cpm Development CORP. | Wapato | — | ◇ UNVERIFIED |
| HIHoughton International | Longview | — | ◇ UNVERIFIED |
| IAInland Asphalt | Spokane | — | ◇ UNVERIFIED |
| IAInland Asphalt Cedar Rapids 20 | Spokane | — | ◇ UNVERIFIED |
| IAInland Asphalt Hawthorne | Spokane | — | ◇ UNVERIFIED |
