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| ATAgilent Techs INC Newport Site | Newport | DE | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| CICroda, INC. Atlas Point Plant Site | New Castle | DE | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| LRLiveo Research INC. | New Castle | DE | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
Noramco LLC | Wilmington | DE | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| OCOrient Corporation of America | Seaford | DE | Chemical Manufacturing325130 | — | ◐ LIKELY ACTIVE |
| VRVeolia - Red Lion Plant | New Castle | DE | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| MLMedal L.p., Air Liquide | Newport | DE | Chemical Manufacturing325220 | — | ◐ LIKELY ACTIVE |
| SPSpi Pharma INC | Lewes | DE | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
Af3, INC. | Seaford | DE | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
Sustainable Generation LLC | Wilmington | DE | Chemical Manufacturing325315 | — | ◐ LIKELY ACTIVE |
| AMAdvanced Material Technology | Wilmington | DE | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
| ATAgilent Technologies INC | Wilmington | DE | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
| ALAgrorefiner, LLC | New Castle | DE | Chemical Manufacturing325222 | 20-99 | ◐ LIKELY ACTIVE |
| ASAshland Specialty Ingredients G.p. | Wilmington | DE | Chemical Manufacturing325000 | — | ◐ LIKELY ACTIVE |
| BOBank of America, N.a. - Deerfield Campus | Newark | DE | Chemical Manufacturing325188 | — | ◐ LIKELY ACTIVE |
| BSBioenergy- Seaford Micronutrient Plant | Seaford | DE | Chemical Manufacturing325311 | — | ◐ LIKELY ACTIVE |
| BWBj's Wholesale Club #0115 | New Castle | DE | Chemical Manufacturing325222 | — | ◐ LIKELY ACTIVE |
| CEClean Earth of New Castle | New Castle | DE | Chemical Manufacturing325222 | — | ◐ LIKELY ACTIVE |
| DCDana Container, INC. | Wilmington | DE | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| DSDiamond State Port Corporation - R/r Flood Controls | Wilmington | DE | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| EDE.i Dupont De Nemours and Company | Wilmington | DE | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| EDE.i. Du Pont De Nemours & Company | Newark | DE | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| EIE I Dupont De Nemours - Experimental Station | New Castle | DE | Chemical Manufacturing325222 | — | ◐ LIKELY ACTIVE |
| FCFmc Corporation | Newark | DE | Chemical Manufacturing325199 | — | ◐ LIKELY ACTIVE |
General Chemical Corporation (closed) | Claymont | DE | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
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| ISInvista S.a.r.l. Seaford Plant | Seaford | DE | Chemical Manufacturing325220 | — | ◐ LIKELY ACTIVE |
| NNuturell | Wilmington | DE | Chemical Manufacturing325612 | — | ◐ LIKELY ACTIVE |
| WPWilmington Pharmatech Company - Pencader - 229a Lake Dr, Newark | Newark | DE | Chemical Manufacturing325411 | — | ◐ LIKELY ACTIVE |
| AIAdesis, INC. | New Castle | DE | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
| BCBasf Colors and Effects Usa, LLC | Newport | DE | Chemical Manufacturing325110 | — | ◐ LIKELY ACTIVE |
| BGBoc Gases | Claymont | DE | Chemical Manufacturing325120 | — | ◐ LIKELY ACTIVE |
| FFuji | New Castle | DE | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| ISIntercontinental Services of Delaware | Wilmington | DE | Chemical Manufacturing325180 | — | ◐ LIKELY ACTIVE |
| JNJax N Daisy, INC. | Dover | DE | Chemical Manufacturing325620 | — | ◐ LIKELY ACTIVE |
| MOMerit Oil CO | New Castle | DE | Chemical Manufacturing325222 | — | ◐ LIKELY ACTIVE |
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| PTPolymer Technologies, INC. | Newark | DE | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
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| THThe Hibbert Group | New Castle | DE | Chemical Manufacturing325320 | — | ◐ LIKELY ACTIVE |
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| ALAir Liquide Advanced Separations | Newport | DE | Chemical Manufacturing325220 | 100-499 | ◐ LIKELY ACTIVE |
| BBBridgeville Branch 33 | Bridgeville | DE | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| CClaymont | Claymont | DE | Chemical Manufacturing325120 | 20-99 | ◐ LIKELY ACTIVE |
| FIFujifilm Imaging Colorants | New Castle | DE | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| FIFujifilm Imaging Colorants Inc. | New Castle | DE | Chemical Manufacturing325910 | 20-99 | ◐ LIKELY ACTIVE |
| ISICP Seaford | Seaford | DE | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| INInternational N&H USA, Inc. | Newark | DE | Chemical Manufacturing325199 | 100-499 | ◐ LIKELY ACTIVE |
| IIIntervet, Inc. Delaware Avenue | Millsboro | DE | Chemical Manufacturing325414 | 20-99 | ◐ LIKELY ACTIVE |