| Aai - Club House Road | 7 | 47 | 27,929.00 |
| Aes Warrior Run | 9 | 41 | 5,488,729.00 |
| Air Prods. Polymers L.P. | 2 | 4 | 10,065.00 |
| Alcore - Quarry Drive | 7 | 23 | 73,476.00 |
| Allegany Energy Supply Llc - R. Paul Smith Power Station | 73 | 184 | 12,506,660.80 |
| Allwood Products - Frostburg | 6 | 24 | 18,000.00 |
| Alpha Ridge Municipal Landfill | 23 | 23 | 1,814.78 |
| Aluglass Packaging | 8 | 41 | 21,584.00 |
| Amcor Flexibles | 4 | 12 | 74,160.00 |
| Amerada Hess Terminal | 16 | 131 | 341,750.94 |
| American Colorgraphics | 8 | 64 | 68,832.00 |
| American Stone-Mix Inc. | 3 | 3 | 744.00 |
| American Yeast | 6 | 50 | 108,688.00 |
| Andrews Air Force Base | 6 | 228 | 150,414.00 |
| Appeal Municipal Landfill & Ts | 28 | 28 | 5,048.12 |
| Atotech Usa Inc. | 2 | 3 | 399.00 |
| Automated Graphic Systems | 6 | 72 | 12,480.00 |
| Automatic Rolls | 3 | 24 | 20,156.00 |
| Back River Waste Water Trtmnt Plant | 6 | 345 | 91,980.00 |
| Balcon | 1 | 1 | 0.10 |
| Baltimore County/Eastern Municipal Landfill & Ts | 27 | 27 | 16,024.18 |
| Baltimore Galvanizing Co. Inc. | 1 | 1 | 250.00 |
| Baltimore Marine Industries | 8 | 28 | 141,666.00 |
| Baltimore Quality Assurance | 1 | 1 | 360.00 |
| Baltimore Spice | 1 | 1 | 250.00 |
| Barstow Sanitary Landfill | 28 | 28 | 895.83 |
| Belden Brick Co | 15 | 30 | 97,245.42 |
| Berlin Town Power Plant | 6 | 55 | 73,655.00 |
| Bethlehem Steel | 14 | 345 | 146,933,775.01 |
| Beulah Sanitary Landfill | 28 | 28 | 7,904.36 |
| Black & Decker U.S. Power Tools Group | 1 | 2 | 379.00 |
| Bp Solar Intl. L.L.C. | 1 | 1 | 20.00 |
| Brandywine C&D Landfill | 28 | 28 | 51,911.75 |
| Brown Station Road Landfill | 15 | 30 | 123,882.00 |
| Burnett, Wm. T. Company | 6 | 18 | 24,730.00 |
| Cadmus Communications | 8 | 148 | 60,552.00 |
| Canam Steel | 9 | 22 | 307,778.00 |
| Carr-Lowrey Glass | 7 | 72 | 270,635.00 |
| Cato-Fitzwater Street Terminal | 4 | 12 | 69,800.00 |
| Cavanaugh Press | 6 | 96 | 27,612.00 |
| Cecil County Central Landfill | 22 | 22 | 831.16 |
| Central Chemical Corp. | 1 | 2 | 3,131.00 |
| Central Municipal Landfill | 28 | 28 | 2,015.33 |
| Charles County Landfill | 28 | 28 | 6,527.78 |
| Charles County Landfill | 28 | 28 | 2,213.43 |
| Chc Industries | 5 | 17 | 53,653.00 |
| Chesapeake Finished Metals Inc. | 5 | 5 | 2,600.00 |
| Citgo-Star - Terminal | 10 | 68 | 123,510.00 |
| Clean Harbors Of Baltimore | 6 | 84 | 31,390.00 |
| Clorox Prods. Mfg. Co. | 1 | 1 | 1.00 |
| Colonial Metals Inc. | 1 | 2 | 255.00 |
| Colonial Pipeline Company | 6 | 24 | 22,560.95 |
| Colonial Pipeline Company | 12 | 47 | 183,018.00 |
| Communication Graphics | 6 | 48 | 21,139.00 |
| Composites Usa Inc. | 3 | 3 | 2,072.05 |
| Conectiv-Crisfield Peaking Station | 6 | 47 | 193,034.26 |
| Conestoga Wood Specialties | 1 | 1 | 3.15 |
| Conocophillips Baltimore Terminal | 11 | 56 | 66,672.00 |
| Constellation Energy - Calvert Cliffs | 6 | 123 | 51,391.00 |
| Constellation Power Source Generation | 16 | 43 | 110,393.13 |
| Constellation Power Source Generation - Brandon Shores | 37 | 58 | 212,055.35 |
| Constellation Power Source Generation - Brandon Shores | 6 | 96 | 119,660.00 |
| Constellation Power Source Generation - Brandon Shores | 73 | 182 | 110,346,915.84 |
| Constellation Power Source Generation - Brandon Shores | 79 | 268 | 88,349,993.62 |
| Constellation Power Source Generation - Wagner | 81 | 382 | 51,475,388.92 |
| Corporate Press - Brightseat Road | 6 | 67 | 17,710.00 |
| Covanta Energy-8309 Tujunga Avenue Corp. | 5 | 10 | 142,200.00 |
| Cpsg Gould Strret | 47 | 78 | 3,575,056.97 |
| Cpsg Philadelphia Road | 6 | 48 | 159,336.00 |
| Cpsg Westport | 5 | 10 | 17,400.00 |
| Craftsman Press - Craftsman Circle | 6 | 48 | 40,995.00 |
| Crown Beverage Packaging | 7 | 14 | 289,140.00 |
| Crown Cork & Seal | 9 | 112 | 43,790.00 |
| Cunningham Rubble Landfill | 28 | 28 | 7,140.86 |
| Curtis Bay Terminal - Bp Products North America | 7 | 54 | 80,442.00 |
| Cytec Engineered Materials | 11 | 236 | 321,328.00 |
| Day, F.O. Bituminous - Piney Mtg | 12 | 24 | 103,642.00 |
| Delta Chemical Corp. | 2 | 2 | 49.00 |
| Dext Company | 6 | 11 | 39,820.00 |
| Diageo North America, Inc. | 6 | 69 | 350,009.00 |
| Dominion Cove Point Lng | 5 | 52 | 250,236.00 |
| Dow Jones & Company | 6 | 70 | 50,005.00 |
| Duke Energy | 4 | 42 | 656,900.00 |
| Duron, Incorporated | 6 | 18 | 37,893.00 |
| Eastalco Aluminum | 16 | 285 | 52,858,873.64 |
| Eastern Correctional Institution | 7 | 206 | 740,953.00 |
| Eastern Organ Pipes Inc. | 1 | 2 | 4.00 |
| Easton Utilities | 6 | 110 | 678,187.00 |
| Easton Utilities - Airport Park | 6 | 66 | 850,750.00 |
| Editors Press | 7 | 56 | 28,539.00 |
| Elite Spice | 2 | 5 | 510.00 |
| Engineered Polymer Solutions | 12 | 54 | 77,065.25 |
| Erachem Comilog Inc. Baltimore Plant | 3 | 6 | 13,103.16 |
| Essroc Cement | 17 | 167 | 6,582,932.81 |
| Eu Services | 6 | 120 | 19,285.00 |
| Fil-Tec | 7 | 104 | 80,914.00 |
| Fleetwood Travel Trailers | 6 | 12 | 22,937.50 |
| Fleischmann'S Vinegar | 2 | 8 | 87,620.00 |
| Fmc Corp. Organic Chemicals Division | 38 | 264 | 258,046.18 |
| Formica Corporation | 3 | 30 | 189,812.00 |
| Fort Detrick | 12 | 226 | 754,911.18 |
| Fort Detrick Municipal Landfill / Area B | 28 | 28 | 3,709.92 |
| Fort George Meade | 10 | 22 | 70,664.00 |
| Fort George Meade Landfill | 28 | 28 | 25,625.20 |
| Fox Inds. Inc. | 2 | 3 | 2,342.00 |
| Franklin Square Hospital Center | 9 | 9 | 10,926.42 |
| French Bray | 9 | 95 | 35,384.00 |
| Furst Brothers Company | 6 | 33 | 14,300.00 |
| Gaf Building Products | 10 | 115 | 244,098.42 |
| Gamse Lithographing Company | 8 | 112 | 42,348.00 |
| Garden State Tanning/Byron Plant | 11 | 111 | 300,011.00 |
| Garrett County Sw Disposal & Recycling Facility | 28 | 28 | 532.96 |
| General Mills Bakeries | 6 | 132 | 296,416.00 |
| General Motors Truck & Bus Group | 17 | 132 | 1,036,702.00 |
| George Weston Bakeries, Inc. | 3 | 24 | 103,120.00 |
| Goddard Space Flight Center | 7 | 554 | 130,232.00 |
| Good Humor Breyers Ice Cream Revised (Dba Conopco) | 1 | 1 | 4,555.00 |
| Gore, W.L. - Cherry Hill Plant | 5 | 42 | 41,534.00 |
| Grace - Davison Chemical | 11 | 137 | 690,835.40 |
| Griffith Energy Services Inc. Frederick Bulk Plant | 2 | 2 | 1,245.00 |
| H & S Bakery | 5 | 10 | 143,860.00 |
| Hagerstown Bookbinding & Printing | 6 | 48 | 17,582.00 |
| Hancock Municipal Landfill | 28 | 28 | 140.16 |
| Harford Co. Wte Fac. | 14 | 38 | 1,194,178.39 |
| Hauswald Bakery/Div Of Schmidt'S | 5 | 20 | 90,760.00 |
| Hi-Tech Color | 6 | 48 | 22,100.00 |
| Hobbs Road Rubble Landfill | 28 | 28 | 770.24 |
| Hoods Mill Road Landfill | 28 | 28 | 7,786.76 |
| Howard County General Hospital | 9 | 9 | 1,630.07 |
| Independent Can Co. | 2 | 2 | 1,000.00 |
| Independent Cement/St. Lawerence | 15 | 62 | 5,619,200.75 |
| Insl-X Prods. Corp. | 2 | 2 | 3,363.00 |
| Invitrogen Corp. | 2 | 4 | 7,886.00 |
| Itw Food Equipment Group L.L.C.Vulcan-Hart Div. | 3 | 3 | 49.66 |
| J.M. Huber Corporation | 6 | 180 | 276,602.00 |
| Jcr Enterprises | 6 | 71 | 184,055.04 |
| Johns Hopkins - Homewood Campus | 6 | 72 | 88,325.00 |
| Johns Hopkins Hospital | 5 | 50 | 396,136.00 |
| Johns Hopkins University School Of Medicine | 9 | 9 | 1,232.83 |
| Kaydon Ring & Seal Inc. | 11 | 158 | 74,053.38 |
| Kelly Press | 6 | 102 | 18,894.00 |
| Kline, Richard F., Incorporated | 11 | 34 | 100,185.36 |
| Kop-Flex Inc. | 1 | 1 | 162.00 |
| Lafarge Building Materials Inc. Sparrows Point | 2 | 4 | 7.12 |
| Lebanon Chemical Corp. | 1 | 2 | 712.00 |
| Lehigh Portland Cement | 9 | 233 | 9,883,306.00 |
| Lehigh Portland Cement | 9 | 51 | 6,032,216.11 |
| Lenmar, Inc. | 13 | 29 | 106,652.00 |
| Life Like Products - Chesapeake Ave. | 6 | 16 | 98,884.00 |
| Lucas, John D. Printing | 9 | 30 | 25,558.00 |
| Mack Trucks | 12 | 72 | 1,739,298.34 |
| Mail-Well Label | 3 | 12 | 22,620.00 |
| Mcardle Printing | 6 | 228 | 29,679.00 |
| Mccormick & Co - 10901 Gilroy Road | 1 | 2 | 4.00 |
| Mccormick Paint Works Co. | 1 | 2 | 500.00 |
| Mccormick Paint Works Co. | 1 | 2 | 500.00 |
| Mccorquodale Color Card | 10 | 44 | 46,163.00 |
| Mercy Medical Center | 9 | 9 | 7,716.16 |
| Mettiki Coal Corporation | 13 | 30 | 630,339.46 |
| Meyer Rubble Landfill | 28 | 28 | 7,786.76 |
| Mid Atlantic Label | 4 | 20 | 21,326.00 |
| Middle River Aircraft Systems | 11 | 56 | 116,768.00 |
| Midshore Regional Landfill | 28 | 28 | 6,716.30 |
| Miirant Station H | 6 | 24 | 524,262.00 |
| Millenium Inorganic Chemicals | 13 | 276 | 14,830,810.71 |
| Millennium Specialty Chemicals | 2 | 2 | 8.60 |
| Millersville Municipal Landfill | 22 | 22 | 13,309.51 |
| Mirant Mid-Atlantic Llc | 78 | 475 | 199,493,442.08 |
| Mirant Mid-Atlantic | 75 | 325 | 86,515,446.62 |
| Mncppc - Sandy Hill Landfill | 21 | 42 | 232,082.00 |
| Montgomery County Rrf | 31 | 107 | 2,556,913.30 |
| Moore Communications Services | 6 | 60 | 15,097.00 |
| Motiva Terminal | 13 | 26 | 217,240.00 |
| Mountain View Landfill / Chambers | 28 | 28 | 7,857.54 |
| National Graphics | 6 | 24 | 14,094.00 |
| National Gypsum | 7 | 134 | 411,099.10 |
| National Institute Of Health | 6 | 237 | 155,696.08 |
| National Institute Of Standards And Technology | 6 | 84 | 127,482.00 |
| National Naval Medical Center | 6 | 132 | 141,675.01 |
| National Security Agency | 6 | 804 | 133,678.00 |
| Naval Surface Warfare Cntr-Indian Hd | 9 | 232 | 2,744,642.86 |
| Neutron Prods. Inc. | 1 | 1 | 250.00 |
| Nevamar Company | 10 | 298 | 367,175.86 |
| Newland Park Landfill | 21 | 42 | 81,900.00 |
| Northern Landfill | 28 | 28 | 7,268.76 |
| Northrop Grumman Sys. Corp. | 1 | 2 | 8.04 |
| Northrop-Grumman - Bwi | 11 | 62 | 72,997.00 |
| Northwest Hospital Center (Formerly Baltimore County General Hospital) | 9 | 9 | 1,800.59 |
| Oaks Landfill | 2 | 2 | 0.11 |
| Oceanic & Naval Sys. | 1 | 1 | 0.46 |
| Owens Corning - Jesup Roofing And Asphalt Plant | 8 | 156 | 500,959.61 |
| Owens-Corning Jessup Roofing & Sphalt Plant | 2 | 2 | 11.00 |
| P Q Corporation | 6 | 12 | 385,554.43 |
| Panda Brandywine, L.P. | 6 | 22 | 277,577.00 |
| Patapsco Designs Inc. | 1 | 1 | 0.07 |
| Patuxent River Naval Air Station | 9 | 318 | 203,673.00 |
| Peake Printers | 6 | 24 | 22,758.00 |
| Pemco Corporation | 13 | 181 | 509,309.80 |
| Pepco - Chalk Point | 83 | 552 | 140,613,209.32 |
| Perdue Farms | 7 | 206 | 2,345,315.00 |
| Perkinelmer Fluid Sciences | 3 | 3 | 253.90 |
| Petroleum Fuel & Terminal Company | 11 | 70 | 81,257.21 |
| Petroleum Fuel & Terminal Company | 10 | 54 | 108,308.00 |
| Phoenix Color Corp | 3 | 6 | 146,350.00 |
| Phoenix Services Incorporated | 17 | 34 | 354,419.21 |
| Plymouth Tube Company | 5 | 12 | 154,874.00 |
| Polystyrene Products | 5 | 12 | 32,140.00 |
| Polystyrene Products | 5 | 24 | 55,800.00 |
| Price Brothers Co. - Perryman Md | 1 | 1 | 1.85 |
| Printing Corporation Of America | 6 | 161 | 26,485.00 |
| Quarantine Road Landfill | 28 | 28 | 46,844.62 |
| Rainbow Cleaners & Uniform Rental | 6 | 60 | 28,990.00 |
| Rayloc | 3 | 40 | 42,324.00 |
| Red Star Yeast | 8 | 80 | 745,060.70 |
| Redland Brick | 23 | 49 | 532,798.98 |
| Reichs Ford Municipal Landfill & Recycling Center | 11 | 11 | 1,242.83 |
| Reliable Contracting | 6 | 24 | 154,039.00 |
| Reliance Treated Wood | 2 | 4 | 20.00 |
| Reproductions - Rickenbacker Drive | 6 | 94 | 25,813.00 |
| Resh Landfill-Washington County | 28 | 28 | 9,124.03 |
| Rhodia Inc. | 4 | 8 | 2,086.00 |
| Rock-Tenn Box - Broening Highway | 6 | 14 | 30,372.00 |
| Rockland Bleach & Dye Works | 1 | 2 | 6,228.00 |
| Rockwood Pigments N.A. Inc. | 2 | 3 | 505.00 |
| Russell-Stanley Services | 12 | 38 | 37,836.00 |
| Rust-Oleum Corporation | 8 | 30 | 55,934.00 |
| S & S Graphics | 6 | 84 | 23,920.00 |
| S.T. Services Terminal | 5 | 82 | 468,960.00 |
| Safety-Kleen Sys. (201601) | 2 | 4 | 7.11 |
| Safeway Stores - Bread Plant | 4 | 40 | 37,856.00 |
| Sasol North America, Inc. | 17 | 55 | 841,765.11 |
| Scarboro Landfill / Harford Waste Disposal Center | 28 | 28 | 6,972.25 |
| Schlumberger Malco | 5 | 42 | 13,398.00 |
| Schmidt Baking | 3 | 16 | 182,760.00 |
| Sherwin Williams Cleaning Solutions | 6 | 26 | 23,456.00 |
| Sherwin-Williams Company | 20 | 213 | 404,301.20 |
| Signode Eastern Operations | 8 | 42 | 45,162.00 |
| Simkins Industries | 10 | 44 | 607,397.70 |
| Sinai Hospital Of Baltimore | 13 | 104 | 155,049.15 |
| Smith Lithograph | 9 | 150 | 53,892.00 |
| Smith, Paul Reed Guitars | 6 | 48 | 29,794.00 |
| Solley Road Landfill | 28 | 28 | 6,006.65 |
| Solo Cup - Rt. 313 | 10 | 58 | 26,976.00 |
| Somerset County / Fairmount Road Landfill | 28 | 28 | 2,677.61 |
| Southern Galvanizing Co. | 1 | 1 | 1,561.00 |
| Spencer Rubble Landfill | 28 | 28 | 297.54 |
| Spirent Communications | 1 | 2 | 11.00 |
| St Services | 12 | 60 | 55,904.00 |
| St. Andrews Municipal Landfill | 28 | 28 | 984.37 |
| Standard Register Company | 6 | 160 | 28,160.00 |
| Statton Furniture | 6 | 156 | 58,210.00 |
| Stericycle, Inc. (Formerly Medx, Inc. And Bfi Medical Waste, Inc.) | 9 | 9 | 14,802.52 |
| Stone Indl. | 1 | 2 | 755.00 |
| Stratus Petroleum | 6 | 12 | 30,295.00 |
| Sun Chemical Gpi | 3 | 6 | 4,395.00 |
| Sweetheart Holdings | 11 | 757 | 144,217.90 |
| Tamko Roofing Products | 10 | 95 | 175,411.00 |
| Tate & Lyle North American Sugars | 7 | 313 | 1,639,659.10 |
| Terumo Medical Corp. | 1 | 2 | 29,504.00 |
| Thiokol Corp | 16 | 16 | 764.69 |
| Thomas Manufacturing Corporation | 5 | 16 | 85,588.00 |
| Tidewater Publishing Corporation | 6 | 72 | 15,450.00 |
| Tilley Chemical Co. Inc. | 1 | 2 | 500.00 |
| Tnemec Company | 13 | 43 | 42,276.00 |
| Transcontinental Gas Pipe Line | 6 | 48 | 4,872,330.00 |
| Trigen - Leadenhall Street | 6 | 96 | 186,091.36 |
| Trigen - North Central Avenue | 6 | 48 | 144,620.00 |
| Trigen Laboratories | 1 | 1 | 180.00 |
| U.S. Aberdeen Proving Grounds | 16 | 16 | 73.67 |
| U.S. Army Directorate Of Public Works | 1 | 1 | 10.00 |
| U.S. Can - Steeltin Division | 6 | 198 | 20,138.00 |
| U.S. Coast Guard Yard - Curtis Bay | 16 | 40 | 112,456.00 |
| U.S. Marine | 10 | 52 | 146,998.00 |
| Unilever Home & Personal Care | 5 | 26 | 81,900.00 |
| United States Gypsum Company | 6 | 33 | 557,628.60 |
| University Of Maryland | 6 | 371 | 275,158.48 |
| University Of Maryland At Baltimore, Environmental Health And Safety Facility | 9 | 9 | 2,030.37 |
| Upper Potomac River Commission | 7 | 50 | 101,960.00 |
| Us Marine - Cumberland I | 11 | 46 | 329,512.00 |
| Us Marine - Cumberland Ii | 11 | 58 | 294,870.00 |
| Us Naval Academy | 6 | 242 | 149,370.00 |
| Usda Ars Beltsville Agricultural Research Center | 2 | 3 | 28.32 |
| Vac Pac Manufacturing | 7 | 69 | 18,100.00 |
| Vale Summit I Sanitary Landfill | 28 | 28 | 7,786.76 |
| Velsicol Chemical | 11 | 98 | 237,821.10 |
| Victor Graphics | 7 | 104 | 18,404.00 |
| Vienna Generating Station | 40 | 60 | 4,335,981.43 |
| Vpi Mirrex | 9 | 43 | 241,658.00 |
| W. R. Grace & Co. Conn | 1 | 2 | 10.00 |
| W.L Gore & Associates Inc. Elk Creek 1/2/3 Site | 0 | 0 | 0.00 |
| W.L. Gore & Associates Fair Hill Facility | 0 | 0 | 0.00 |
| W.L. Gore & Associates Inc. | 1 | 2 | 1,964.00 |
| Wabtec Railway Electronics | 1 | 1 | 0.40 |
| Waldorf Marble Inc. | 1 | 2 | 1,435.00 |
| Washington County Hospital | 7 | 7 | 1,042.59 |
| Washington Post, The | 12 | 94 | 43,665.00 |
| Waste Energy Partners | 16 | 32 | 804,080.00 |
| Wells, J.V., Inc - Sharptown | 6 | 24 | 298,372.90 |
| Western Publishing/Mail-Well Graphic | 5 | 64 | 26,704.00 |
| Westvaco Fine Papers | 37 | 884 | 54,280,783.70 |
| Wheelabrator Baltimore Lp | 33 | 129 | 3,002,046.06 |
| Wienerberger Group (General Shale) | 15 | 30 | 79,663.46 |
| Wilkins-Rogers Inc. | 1 | 1 | 250.00 |
| Xerxes Corporation | 3 | 6 | 356,040.00 |
