| LOCKHEED MARTIN AERONAUTICS CO | PALMDALE | CA | Chromium | 130 | 0 | 70,368 | 92.11% | 17.9% | 79.6% | |
| LOCKHEED MARTIN AERONAUTICS CO | PALMDALE | CA | Nickel | 89 | 0 | 4,962 | 6.49% | 17.9% | 79.6% | |
| LOCKHEED MARTIN MFC - ORLANDO | ORLANDO | FL | Lead | 191 | 0 | 848 | 1.11% | 15.5% | 65.3% | |
| US AIR FORCE PLANT 4 LOCKHEED MARTIN AERONAUTICS CO | FORT WORTH | TX | Naphthalene | 163 | 0 | 85 | 0.11% | 12.7% | 51.9% | |
| SIKORSKY AIRCRAFT STRATFORD FACILITY | STRATFORD | CT | Nitric acid | 3,995 | 0 | 56 | 0.07% | 11.0% | 40.1% | |
| LOCKHEED MARTIN CORP | LIVERPOOL | NY | Lead compounds | 8 | 0 | 23 | 0.03% | 11.1% | 23.9% | |
| LOCKHEED MARTIN CLEARWATER OPERATION | OLDSMAR | FL | Lead compounds | 3 | 0 | 19 | 0.02% | 12.6% | 31.0% | |
| LOCKHEED MARTIN - ARCHBALD | ARCHBALD | PA | Lead | 8 | 0 | 8 | 0.01% | 11.2% | 13.1% | |
| LOCKHEED MARTIN MISSILES & FIRE CONTROL | OCALA | FL | Lead | 4 | 0 | 7 | 0.01% | 13.9% | 44.8% | |
| SIKORSKY AIRCRAFT STRATFORD FACILITY | STRATFORD | CT | Hydrogen fluoride (Hydrofluoric acid) | 464 | 0 | 6 | 0.01% | 11.0% | 40.1% | |
| US AIR FORCE PLANT 4 LOCKHEED MARTIN AERONAUTICS CO | FORT WORTH | TX | Toluene | 24,486 | 0 | 2 | 0.00% | 13.1% | 50.7% | |
| LOCKHEED MARTIN RMS | OWEGO | NY | Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.) | 250 | 0 | 2 | 0.00% | 12.7% | 12.0% | |
| LOCKHEED MARTIN AERONAUTICS CO | PALMDALE | CA | Xylene (mixed isomers) | 830 | 1 | 1 | 0.00% | 18.0% | 79.8% | |
| LOCKHEED MARTIN RMS | OWEGO | NY | Lead compounds | 13 | 0 | 1 | 0.00% | 12.8% | 12.1% | |
| LOCKHEED MARTIN AERONAUTICS CO | PALMDALE | CA | Methyl tert-butyl ether | 272 | 0 | 1 | 0.00% | 17.7% | 79.2% | |
| SIKORSKY AIRCRAFT STRATFORD FACILITY | STRATFORD | CT | Ammonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing) | 2,493 | 0 | 1 | 0.00% | 11.0% | 40.1% | |
| LOCKHEED MARTIN AERONAUTICS CO | PALMDALE | CA | Copper | 10 | 0 | 1 | 0.00% | 18.1% | 79.8% | |
| LOCKHEED MARTIN RMS | OWEGO | NY | Nitric acid | 500 | 8,731 | 1 | 0.00% | 12.4% | 11.6% | |
| LOCKHEED MARTIN RMS | OWEGO | NY | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 380 | 0 | 0 | 0.00% | 12.3% | 11.5% | |
| LOCKHEED MARTIN SPACE | LITTLETON | CO | Lead | 0 | 0 | 0 | 0.00% | 7.6% | 33.7% | |
| LOCKHEED MARTIN MISSILES & FIRE CONTROL | LUFKIN | TX | Lead | 1 | 0 | 0 | 0.00% | 14.6% | 44.3% | |
| LOCKHEED MARTIN MISSILES & FIRE CONTROL | GRAND PRAIRIE | TX | Lead | 0 | 0 | 0 | 0.00% | 12.6% | 68.8% | |
| LOCKHEED MARTIN AERONAUTICS CO | PALMDALE | CA | Toluene | 550 | 1 | 0 | 0.00% | 17.9% | 79.6% | |
| SIKORSKY AIRCRAFT STRATFORD FACILITY | STRATFORD | CT | Methanol | 466 | 213 | 0 | 0.00% | 9.4% | 34.1% | |