| NCNorphlet Chemical, INC. | Norphlet | AR | — | ◇ UNVERIFIED |
| NANorris Asphalt Paving CO - Amazonia Quarry (napco Site 14) | Amazonia | MO | — | ◇ UNVERIFIED |
| NANorris Asphalt Paving Co-gallatin | Gallatin | MO | — | ◇ UNVERIFIED |
| NCNorth Central Construction | Moses Lake | WA | — | ◇ UNVERIFIED |
| NANortheast Asphalt - #56 | Ripon | WI | — | ◇ UNVERIFIED |
| NANortheast Asphalt - #57 | Eden | WI | — | ◇ UNVERIFIED |
| NANortheast Asphalt C28 | Gladstone | MI | — | ◇ UNVERIFIED |
| NANortheast Asphalt, INC. | Rapid River | MI | — | ◇ UNVERIFIED |
| NANortheast Asphalt, INC. | Ironwood | MI | — | ◇ UNVERIFIED |
| NBNortheast Biodiesel Company LLC | Greenfield | MA | — | ◇ UNVERIFIED |
| NPNortheast Paving/adamsburg Asphalt Plt | Adamsburg | PA | — | ◇ UNVERIFIED |
| NPNortheast Paving Granby Plant | Granby | MA | — | ◇ UNVERIFIED |
| NPNortheast Paving Lenoxdale Facility | Lee | MA | — | ◇ UNVERIFIED |
| NPNortheast Paving - Washington Hma Plant | Washington | ME | — | ◇ UNVERIFIED |
| NINorthern Improvement CO | Sabin | MN | — | ◇ UNVERIFIED |
| NINorthern Improvement Co-bismarck Asphalt Batch Plant | Bismarck | ND | — | ◇ UNVERIFIED |
| NINorthern Improvement CO - Madsen Unit 40 | Sabin | MN | — | ◇ UNVERIFIED |
| NMNorthern Maine Paving INC | Van Buren | ME | — | ◇ UNVERIFIED |
| NMNorthern Maine Paving INC | Limestone | ME | — | ◇ UNVERIFIED |
| NPNorthern Paving INC | Northern Township | MN | — | ◇ UNVERIFIED |
| NFNorth Fayette Supply Llc/bullskin West Pad | Mount Pleasant | PA | — | ◇ UNVERIFIED |
| NFNorth Fayette Supply Speers Site | Charleroi | PA | — | ◇ UNVERIFIED |
| NFNorth Field Asphalt Plant (fluor/usaf) | Tinian | MP | — | ◇ UNVERIFIED |
| NKNorth Kansas City Stockpile | Kansas City | MO | — | ◇ UNVERIFIED |
| NCNorthland Constructors of Duluth LLC - Metallic | Duluth | MN | — | ◇ UNVERIFIED |
| NSNorth Shore Paving CORP. | Kings Park | NY | — | ◇ UNVERIFIED |
| NANorthstar Asphalt INC. (1576171157) | North Canton | OH | — | ◇ UNVERIFIED |
| NMNorthstar Materials INC Dba Knife River Materials | Bemidji | MN | — | ◇ UNVERIFIED |
| NANorthstate Asphalt | Redding | CA | — | ◇ UNVERIFIED |
| NFNorthway Fuel LLC | Yonkers | NY | — | ◇ UNVERIFIED |
| NENorthwestern Engineering | Commerce City | CO | — | ◇ UNVERIFIED |
| NGNorthwest Granite Everett Site | Everett | WA | — | ◇ UNVERIFIED |
| NSNorthwest Sand and Gravel 00420 | Twin Falls | ID | — | ◇ UNVERIFIED |
| NDNotre Dame Investors INC - Jennings Refinery | Jennings | LA | — | ◇ UNVERIFIED |
| NINupac, INC - a Division of Helena Sand & Gravel | Kalispell | MT | — | ◇ UNVERIFIED |
| NLNustar Logistics L P | Pittsburg | CA | — | ◇ UNVERIFIED |
| NCNvr Custom Contractors | Rutherford | NJ | — | ◇ UNVERIFIED |
| NFNwpmg00002 Former Texaco Sunburst Works | Sunburst | MT | — | ◇ UNVERIFIED |
| NHNycdot Harper Street Asphalt Plant | New York | NY | — | ◇ UNVERIFIED |
| OAObsidian Asphalt Paving, Inc. | Chicago | IL | — | ◇ UNVERIFIED |
| OAObsidian Asphalt Paving, Inc. | West Chicago | IL | — | ◇ UNVERIFIED |
| OAOcala Asphalt Plant | Ocala | FL | — | ◇ UNVERIFIED |
| OCOconto County Highway Dept | Spruce | WI | — | ◇ UNVERIFIED |
| OCO Cross Paving/erie | Union City | PA | — | ◇ UNVERIFIED |
| OCO Cross Paving/erie | Wattsburg | PA | — | ◇ UNVERIFIED |
| OTO'daniel Trucking CO | Carmi | IL | — | ◇ UNVERIFIED |
| OTOdessa Terminal | Odessa | TX | — | ◇ UNVERIFIED |
| OPOffen Petroleum INC | Commerce City | CO | — | ◇ UNVERIFIED |
| ODOffsite Demolition Charlton Pollard Neighborhood | Beaumont | TX | — | ◇ UNVERIFIED |
| OAOgden Avenue Materials INC | Chicago | IL | — | ◇ UNVERIFIED |
| OGO & G Industries INC | Stamford | CT | — | ◇ UNVERIFIED |
| OIO&g Industries INC | Harwinton | CT | — | ◇ UNVERIFIED |
| OCO'hare Concrete Plant | Chicago | IL | — | ◇ UNVERIFIED |
| OCOhio County Road Department | Hartford | KY | — | ◇ UNVERIFIED |
| OVOhio Valley Asphalt INC | Carrollton | KY | — | ◇ UNVERIFIED |
| OSOil Spill (blacklidge Emulsions,, Inc.) | Gulfport | MS | — | ◇ UNVERIFIED |
| OLOilstone LLC / Shady Point Plant | Shady Point | OK | — | ◇ UNVERIFIED |
| OCOkanogan CO Public Works Midland Pu | Okanogan | WA | — | ◇ UNVERIFIED |
| OAOlathe Aggregate Facilities (stormwater) | Olathe | KS | — | ◇ UNVERIFIED |
| OMOldcastle Materials, INC. | Schenectady | NY | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - Cugnini Pit | Durango | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba B&b Excavating | Eagle | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba Four Conrners | Durango 2.5 Mi Se of | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba United CO of Mesa | Montrose | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba United CO of Mesa | Gunnison 2.6 Mi. E of | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba United CO of Mesa | Rifle | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group Dba United CO of Mesa | Grand Junction | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group, INC. - Asphalt Plant | Mancos Area | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group- Tri County Pit | Hotchkiss | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw Group - Wattenberg West | Brighton, 2.0 Mi Nw of | CO | — | ◇ UNVERIFIED |
| OSOldcastle Sw - Trinidad Hma Gen | Trinidad | CO | — | ◇ UNVERIFIED |
| OROlein Recovery CORP | Yabucoa | PR | — | ◇ UNVERIFIED |
| OBOmann Brothers INC - St Michael | Saint Michael | MN | — | ◇ UNVERIFIED |
| OCOmans Contracting INC | Hesperia | MI | — | ◇ UNVERIFIED |
| OHOmega Henderson Terminal | Henderson | KY | — | ◇ UNVERIFIED |
| OMOmg Midwest | Omaha | NE | — | ◇ UNVERIFIED |
| OMOmg Midwest Dba Cessford Construction CO | Burlington | IA | — | ◇ UNVERIFIED |
| OMOmg Midwest, INC. | Stanton | TN | — | ◇ UNVERIFIED |
| OEOmni Engineering INC | Omaha | NE | — | ◇ UNVERIFIED |
| OEOmni Engineering Plant 02 | Omaha | NE | — | ◇ UNVERIFIED |
| OEOmni Engineering Plant 02 | Omaha | NE | — | ◇ UNVERIFIED |
| OCOneida County Highway Department | Rhinelander | WI | — | ◇ UNVERIFIED |
| OGOnslow Grading & Paving, INC. | Hubert | NC | — | ◇ UNVERIFIED |
| O7Ontario 76 | Ontario | CA | — | ◇ UNVERIFIED |
| OPOnyx Paving Company | Seymour | IN | — | ◇ UNVERIFIED |
| OROpen Road Asphalt CO LLC | Marshall | IL | — | ◇ UNVERIFIED |
| OROpen Road Asphalt CO. LLC - Fairmount | Fairmount | IL | — | ◇ UNVERIFIED |
| OROpen Road Asphalt Company LLC | Paxton | IL | — | ◇ UNVERIFIED |
| OCOrange Crush LLC | Des Plaines | IL | — | ◇ UNVERIFIED |
| OCOrange Crush LLC | East Dundee | IL | — | ◇ UNVERIFIED |
| OCOrange Crush LLC | Wheeling | IL | — | ◇ UNVERIFIED |
| OCOrange Crush LLC | Skokie | IL | — | ◇ UNVERIFIED |
| OBOrigin Baltimore Recycling, LLC | Curtis Bay | MD | — | ◇ UNVERIFIED |
| OPOrlando Paving Company | Winter Garden | FL | — | ◇ UNVERIFIED |
| OPOrlando Paving Company | Oviedo | FL | — | ◇ UNVERIFIED |
| OPOrlando Paving Company | Apopka | FL | — | ◇ UNVERIFIED |
| OPOrlando Paving Company | Orlando | FL | — | ◇ UNVERIFIED |
| OBOsage Beach, Mo Stockpile | Kaiser | MO | — | ◇ UNVERIFIED |
| OPOscar Pit | Gnesen Township | MN | — | ◇ UNVERIFIED |
| OAOsuna Asphalt Plant | Albuquerque | NM | — | ◇ UNVERIFIED |