| America Online Inc | 6 | 11 | 67,116.45 |
| Apac Virginia Incorporated- Manassas Plant | 5 | 11 | 96,252.34 |
| Atlantic Research Corp. | 1 | 1 | 1.10 |
| Betco Block & Prods. | 1 | 1 | 0.10 |
| Bradford Landfill | 28 | 28 | 6,279.66 |
| City Of Manassas/Vmea | 5 | 15 | 247,560.00 |
| Concophillips - Manassas Terminal | 8 | 28 | 78,888.66 |
| Dominion - Possum Point | 78 | 267 | 54,969,673.62 |
| Glen-Gery Corporation - Capitol Plant | 18 | 42 | 430,742.14 |
| Independent Hill Lf-Pr William | 28 | 28 | 7,592.62 |
| Lockheed Martin Manassas | 7 | 143 | 45,036.88 |
| Micron Technology Incorporated | 8 | 22 | 74,757.77 |
| Prince William County Sanitary Landfill | 22 | 60 | 336,083.71 |
| Quantico Mcb Lf | 28 | 28 | 2,834.10 |
| Robertson Landfill | 28 | 28 | 2,646.36 |
| Transcontinental Gas Pipeline-Station 185 | 5 | 81 | 660,568.11 |
| Us Marine Corps - Quantico | 7 | 133 | 195,471.75 |
