End User Directory
| Plant |
City, State Zip/Country |
| 2Energy, Inc. | Damascus, MD 20872 |
| AAI CORP | HUNT VALLEY, MD 21030 |
| AAI Corp. | Cockeysville, MD 21030 |
| ABC Laboratories | Columbia, MD 65202-8807 |
| ABERDEEN PROVING GROUND - ABER | ABERDEEN, MD 21005 |
| ABI Advanced Biotechnologies | Columbia, MD 21045-1803 |
| Advanced Bioscience Laboratories | Kensington, MD 20895-1042 |
| Advanced Biotechnologies | Columbia, MD 21045-1803 |
| Advanced Genetic Technologies Corp. | Gaithersburg, MD 20879-4149 |
| AEC/ Booz Allen Hamilton | Abingdon, MD 21009 |
| Aeronet | Greenbelt, MD 20771 |
| AES Warrior Run Cogeneration Facility | Cumberland, MD 21502 |
| AES WARRIOR RUN INC | CUMBERLAND, MD 21502 |
| Agri Sense | Palo Alto, MD |
| Air and Radiation Mgmt. Administration | Baltimore, MD 21230-1720 |
| AIR PRODUCTS POLYMERS LP | ELKTON, MD 21921 |
| Airflow Co | Frederick, MD 21701-3136 |
| AIRPORT RMX | TOWSON, MD 21286 |
| Alaris Medical | Creedmoor, MD 27522 |
| ALCORE INC LAKESIDE | EDGEWOOD, MD |
| Alpharma | Baltimore, MD 21244 |
| Alpharma | Columbia, MD |
| American Academy of Environmental Engineers | Annapolis, MD 21401 |
| American Flouroseal Corp. | Gaithersburg, MD 20877 |
| AMERICAN SUGAR REFINING INC BALT DOMINO SUGAR REFINERY | BALTIMORE, MD 21230 |
| AMERICAN SUGAR REFINING, INC. | BALTIMORE, MD 21230 |
| American Type Culture Collection | Rockville, MD 20852 |
| AMERICAN YEAST CORP | BALTIMORE, MD 21222 |
| Antex Biologics Inc. | Gaithersburg, MD 20879 |
| Apogee Research, Inc. | Bethesda, MD 20814 |
| ASHBURTON FILTRATION PLANT | BALTIMORE, MD 21215 |
| ATOTECH USA INC. | BALTIMORE, MD 21226 |
| Automated Precision Inc. | Gaithersburg, MD 20879-4110 |
| BAFI | Baltimore, MD 21201-3451 |
| BALCON | ODENTON, MD 21114 |
| BALTIMORE GALVANIZING CO INC | BALTIMORE, MD 21237 |
| BALTIMORE GLASSWARE DECORATORS INC | BALTIMORE, MD 21206 |
| BALTIMORE QUALITY ASSURANCE | BALTIMORE, MD 21224 |
| Battelle | Silver Spring, MD 20903 |
| Battelle Memorial Institute | Bryans Road, MD 20616 |
| Baxter - Columbia | Columbia, MD 21046-2357 |
| Bechtel Corporation | Gaithersburg, MD 20878-5356 |
| Becton Dickinson Microbiology | Cockeysville - Hunt Valley, MD 21031-1103 |
| Becton Dickinson Microbiology | Cockeysville -Hunt Valley, MD 21031-1103 |
| Beechwood Coal Llc | Frostburg, MD 21532 |
| Bell-Moore Labs | Hampstead, MD 21074-2232 |
| BERETTA USA CORP | ACCOKEEK, MD 20607 |
| Bio Science Contract Production | Baltimore, MD 21224-6824 |
| BioCon | Rockville, MD 20850 |
| Biofx Laboratories | Randallstown, MD 21133 |
| Biological Research Facilty | Ijamsville, MD 21754-8769 |
| Biomed Devices Corp. | Gaithersburg, MD 20879-4704 |
| BioReliance | Rockville, MD 20850 |
| BioReliance | Rockville, MD 20850-3349 |
| BioScience Inc. - PBI | Rockville, MD 20753 |
| BISHOP FEED MILL | BISHOP, MD 21813 |
| BLACK & DECKER(U.S.) INC | HAMPSTEAD, MD 21074 |
| Booz, Allen & Hamilton | Bethesda, MD 20814 |
| BP LUBRICANTS USA INC | BALTIMORE, MD 21220 |
| BP PRODUCTS NORTH AMERICA INC CURTIS BAY TERMINAL | CURTIS BAY, MD 21226 |
| BP SOLAR INTERNATIONAL LLC | FREDERICK, MD 21703 |
| BRANDON SHORES & WAGNER COMPLEX | BALTIMORE, MD 21226 |
| BUILDING MATERIALS MANUFACTURING CORP | BALTIMORE, MD 21224 |
| Bureau of Utilities-Howard County | Columbia, MD 21045-2637 |
| Business Publishers, Inc. | Silver Spring, MD 20910 |
| C.P. CRANE GENERATING STATION | BALTIMORE, MD 21226 |
| CALVERT CLIFFS NUCLEAR PWR.PLT | LUSBY, MD 20657 |
| Cambrex | Walkersville, MD 21793-0127 |
| Cambrex Bio Science | Baltimore, MD 21224 |
| Carnegie Institution / Johns Hopkins University | Baltimore, MD 21201 |
| Center for Biosecurity | Baltimore, MD 21202 |
| Center of Marine Biotechnology | Baltimore, MD 21202-3101 |
| CERTAINTEED CORP | WILLIAMSPORT, MD 21795 |
| Chesapeake Bay Foundation | Annapolis, MD 21403 |
| Chesapeake Biological Labs | Baltimore, MD 21215-3215 |
| Chesapeake Biological Labs Inc. | Baltimore, MD 21230-2526 |
| Chesapeake Climate Action Network | Takoma Park, MD 20912 |
| CHESAPEAKE FINISHED METALS INC. | ELKRIDGE, MD 21075 |
| CHEVRON PHILLIPS CHEMICAL CO PERFORMANCE PIPE DIV | HAGERSTOWN, MD 21740 |
| China MPP Ventures, LLC | Ellicott City, MD 21043 |
| CITGO PETROLEUM CORP | BALTIMORE, MD |
| CITRUS & ALLIED ESSENCES LTD | BELCAMP, MD 21017 |
| City of Westminister | Westminister, MD 21157 |
| CLARIANT CORP MASTERB ATCHES DIV | MILLINGTON, MD 21651 |
| Clean Air Action Corporation | Annapolis, MD 21401 |
| CLEANEDGE | BALTIMORE, MD 21227 |
| CLENDENIN BROTHERS INC | BALTIMORE, MD 21213 |
| Clise Coal Company Inc | Frostburg, MD 21532 |
| CLOROX PRODUCTS MANUFACTURING CO | ABERDEEN, MD 21001 |
| CLOVERLAND/GREEN SPRING DAIRY | BALTIMORE, MD |
| Coal Technology Association | Gaithersburg, MD 20878 |
| Cobra Mining Inc | Barton, MD 21521 |
| COLONIAL METALS INC | ELKTON, MD 21922 |
| Combustion Sci. & Engineering | Columbia, MD 21045 |
| Competitive Power Ventures/ CPV, Inc. | Silver Spring, MD 20910 |
| CONGOLEUM CORP. | FINKSBURG, MD 21048 |
| Consolidated Pharmaceutical | Baltimore, MD 21225-3835 |
| CONSTALATION POWER SOURCE,INC. | BALTIMORE, MD 21226 |
| Constellation Energy Group | Baltimore, MD 21226 |
| CONSTELLATION POWER - C.P. CRA | CHASE, MD 21220 |
| CONSTELLATION POWER - GOULD ST | BALTIMORE, MD 21230 |
| CONSTELLATION POWER - RIVERSID | DUNDALK, MD 21222 |
| Coram Health Care | Columbia, MD 21046-2132 |
| CPF Associates, Inc. | Takoma Park, MD 20912 |
| CROWN FOOD PACKAGING | BALTIMORE, MD 21221 |
| CSI Engineering, Inc. | Montgomery Village, MD 20886 |
| CSRM, Inc. | Baltimore, MD 21218 |
| Cumberland, City of | Cumberland, MD 21501-1702 |
| CYTEC ENGINEERED MATERIALS INC . | HAVRE DE GRACE, MD 21078 |
| CytImmune Sciences | Rockville, MD 20850-3368 |
| DAP INC. | BALTIMORE, MD |
| Delta Chemical | Baltimore, MD 21226 |
| DELTA CHEMICAL CORP | BALTIMORE, MD |
| Denro Laboratories Inc. | Gaithersburg, MD 20877-1494 |
| Department of Defense | Fort Goerge G Mead, MD 20755-6566 |
| Development & Operations Div. | Baltimore, MD 21203-1637 |
| DIXON VALVE & COUPLING CO | CHESTERTOWN, MD 21620 |
| DRS-SIGNAL SOLUTIONS INC | GAITHERSBURG, MD 20878 |
| Duckworth Coal Inc | Frostburg, MD 21532 |
| DURON PAINTS & WALLCOVERINGS | BELTSVILLE, MD |
| E3M Incorporated | North Potomac, MD 20878 |
| EA Engineering, Science & Technol. | Sparks, MD 21152-9201 |
| EASTALCO ALUMINUM CO | FREDERICK, MD 21703 |
| EASTALCO ALUMINUM CO PIER | FREDERICK, MD 21703 |
| EASTALCO ALUMINUM COMPANY | FREDERICK, MD 21701 |
| Eastalco Aluminum Company / ALCOA | Frederick, MD 21701 |
| EATON AEROQUIP INC | WILLIAMSPORT, MD 21795 |
| EATON CORP FLUID CONVEYANCE DIV | BELTSVILLE, MD 20705 |
| EATON ELECTRICAL | ELKRIDGE, MD 21075 |
| Eaton Fusions Semiconductor | Rockville, MD 20855-2798 |
| EG&G Defense Materials, Inc. | Gaithersburg, MD 20875 |
| ELITE SPICE INC. | JESSUP, MD 20794 |
| Energy & Environmental Solutions | Gaithersburg, MD 20882 |
| Energy Intelligence Group | Bethesda, MD 20814 |
| ENGINEERED POLYMER SOLUTIONS INC. | WILLIAMSPORT, MD 21795 |
| Environmental Agronomics | Quantico, MD 21856 |
| Environmental Elements Corp. | Baltimore, MD 21227 |
| Environmental Resources Mgmt. | Annapolis, MD 21401 |
| ERACHEM COMILOG INC BALTIMORE PLANT | BALTIMORE, MD |
| Erco, Inc. | Glen Burnie, MD 21061-3065 |
| Essroc Cement Co.-Frederick Plant | Frederick, MD 21703 |
| ESSROC CEMENT CORP FREDERICK MD PLANT | BUCKEYSTOWN, MD |
| EVI Inc. | Columbia, MD 21046-2132 |
| Excel Services Corporation | Rockville, MD 20852 |
| Exeter Associates | Columbia, MD 21044 |
| Explosive Technologies & Services Corp./ETSC | Columbia, MD 21045 |
| FAIRVIEW COAL CO. | MIDLOTHIAN, MD 21543 |
| Florida State University-CISTEMS | Gaithersburg, MD 20878-7421 |
| FLOWSERVE PUMP DIV | TANEYTOWN, MD 21787 |
| FMC CORP | BALTIMORE, MD 21226 |
| FMC CORPORATION | BALTIMORE, MD 21226 |
| Food & Drug Administration (FDA) | Rockville, MD 20852-1428 |
| FORMICA CORP / SOLID SURFACING DIV | ODENTON, MD |
| FORT DETRICK WWTP | FREDERICK, MD 21702 |
| FORT MEADE WWTP | FORT MEADE, MD 20755 |
| Foundation Coal Holdings, Inc. | Lithicum Heights, MD 21090 |
| FOX INDUSTRIES INC | BALTIMORE, MD 21211 |
| Frederick Research Ctr. | Frederick, MD 21701-4789 |
| FUCHS NORTH AMERICA INC BALTIMORE SPICE INC | OWINGS MILLS, MD |
| Fuller Equipment Group | Forest Hill, MD 21050 |
| G & S Coal Company Inc | Bloomington, MD 21523 |
| Geiger, Inc. | Baltimore, MD 21237 |
| General Physics Corporation | Aberdeen Prov.Ground, MD 21010-0038 |
| Genetic Therapy, Inc. - Novartis | Gaithersburg, MD 20878-1703 |
| GenOn Energy Management | Landover, MD 20785 |
| Genvec Inc. | Rockville, MD 20852-1709 |
| Gilro Associates | Westminster, MD 21157-6720 |
| Global Environment Fund | Chevy Chase, MD 20815 |
| GM NORTH AMERICAN TRUCK GROUP BALTIMORE | BALTIMORE, MD 21224 |
| GM POWERTRAIN BALTIMORE TRANSMISSION PLANT | WHITE MARSH, MD 21162 |
| Goddard Spaceflight Center (Mantech) | Greenbelt, MD 20771 |
| GOOD HUMOR CORP | HAGERSTOWN, MD 21742 |
| Gore Creative Tech WW | Elkton, MD 21922 |
| GRACE DAVISON CURTIS BAY WORKS | BALTIMORE, MD |
| GRIFFITH ENERGY SERVICES INC. FREDERICK BULK PLANT | CHEVERLY, MD 20781 |
| Grumman Corp | Baltimore, MD |
| GST AUTOLEATHER, INC. | WILLIAMSPORT, MD 21795 |
| Guilford Pharmaceuticals | Baltimore, MD 21224-6515 |
| HANSON PIPE & PRECAST INC JESSUP PLANT | JESSUP, MD 20794 |
| Harford County Dept Public Works | Perryman, MD 21130 |
| HARFORD DURACOOL LLC | ABERDEEN, MD 21001 |
| HARSCO CO HECKETT MULTISERV PLANT 80 | FORT HOWARD, MD 21052 |
| Hartford County Government | Bel Air, MD 21014 |
| Harvard County Government/Water & Sewer | Bel Air, MD 21014 |
| Headquarters | Gaithersburg, MD 20884-6001 |
| Hellerworx, Inc. | Chevy Chase, MD 20815 |
| Helvoet Pharma | Salisbury, MD 21801-7803 |
| Hemagen Diagnostics Inc | Columbia, MD 21045-2110 |
| Hill & Associates/A Wood McKenzie Company | Annapolis, MD 21401 |
| Historic Property Development | Chestertown, MD 21620 |
| Holcim (US) Inc.,-Hagerstown Plant | Hagerstown, MD 21742 |
| Honeywell | Columbia, MD 21045-1998 |
| HOPEWELL BUSINESS CENTER | HOPEWELL TWP, NJ 8525 |
| Howard County | Savage, MD 20763-9727 |
| HUGHES NETWORK SYSTEMS LLC | GERMANTOWN, MD 20876 |
| Human Genome Sciences | Rockville, MD 20850 |
| HURLOCK FEED MILL/HATCHERY | HURLOCK, MD 21643 |
| Hybridoma Reagent Labs. | Kingsville, MD 21087-1742 |
| ICF Consulting | Silver Spring, MD 20910 |
| INDEPENDENT CAN CO | BELCAMP, MD 21017 |
| International Trade Association | Bethesda, MD 20817 |
| Intracel Corporation | Rockville, MD 20850-4330 |
| INVITROGEN CORP | FREDERICK, MD 21704 |
| ISG SPARROWS POINT LLC | BALTIMORE, MD 21219 |
| ISG SPARROWS POINT, INC. | SPARROWS POINT, MD 21229 |
| ITW FOOD EQUIPMENT GROUP LLC VULCAN-HART | BALTIMORE, MD 21222 |
| Ivac Corp. | Creedmoor, MD 27522-9652 |
| Jackson & Tull | Laurel, MD 20706-6234 |
| James Senate Office Bldg. | Annapolis, MD 21401 |
| John Hopkins APL | Laurel, MD 20723 |
| John Hopkins -Steinberger Monoclonals | Baltimore, MD 21204-1901 |
| John Hopkins University | Baltimore, MD 21218 |
| Johns Hopkins University | Baltimore, MD 21218 |
| Johnson Controls Inc. | Columbia, MD 21045 |
| Joint Global Change Research Institute | College Park, MD 20740 |
| KAYDON RING & SEAL INC | BALTIMORE, MD 21203 |
| Kemp Biotechnologies , Inc. | Frederick, MD 21704-8321 |
| KINGSFORD MANUFACTURING CO | LUKE, MD 21540 |
| Kirkegaard & Perry (KPL) | Gaithersburg, MD 20879-4166 |
| KOP-FLEX, INC. | HANOVER, MD 21076 |
| Kwv Operations Llc | SILVER SPRING, MD 20910 |
| Kwv Operations, Llc | Silver Spring, MD 20910 |
| Lab for Physical Sciences | College Park, MD 20740 |
| LAFARGE CENTRAL RMX | TOWSON, MD 21286 |
| LAFARGE COVINGTON RMX | TOWSON, MD 21286 |
| LAFARGE GRAMERCY RMX | TOWSON, MD 21286 |
| LAFARGE MID ATLANTIC HAMMOND RMX | TOWSON, MD 21286 |
| LAFARGE MID ATLANTIC HOUMA RMX | TOWSON, MD 21286 |
| LAFARGE MID ATLANTIC JESSUP RMX | TOWSON, MD 21286 |
| LAFARGE MID ATLANTIC NEW ORLEANS EAST RMX | TOWSON, MD 21286 |
| LAFARGE MID ATLANTIC SLIDELL RMX | TOWSON, MD 21286 |
| LAFARGE MID ATLANTIC THIBODAUX RMX | TOWSON, MD 21286 |
| LAFARGE MID-ATLANTIC INC FREDERICK RMX | TOWSON, MD 21286 |
| LAFARGE MID-ATLANTIC INC JOPPA RMX | TOWSON, MD 21286 |
| LAFARGE MID-ATLANTIC INC MARRIOTTSVILLE RMX | TOWSON, MD 21286 |
| LAFARGE MID-ATLANTIC INC ROCKVILLE RMX | TOWSON, MD 21286 |
| LAFARGE MID-ATLANTIC TEXAS READY MIX | TOWSON, MD 21286 |
| LAFARGE NA INC LULING RMX | TOWSON, MD 21286 |
| LAFARGE NORTH AMERICA SPARROWS POINT | SPARROWS POINT, MD 21219 |
| Laminar Direct Capital/ Member D.E. Shaw Group | Bethesda, MD 20814 |
| Law Office of Jeffrey Smith | Bethesda, MD 20814 |
| LEHIGH CEMENT CO | UNION BRIDGE, MD 21791 |
| LEHIGH CEMENT CO | WOODSBORO, MD 21798 |
| Lehigh Cement Co./ N. Region-Union Bridge Plant | Union Bridge, MD 21791 |
| LENMAR | BALTIMORE, MD 21224 |
| LESAFFRE YEAST CORP | BALTIMORE, MD 21224 |
| LFG&E, Inc. | Chestertown, MD 21620 |
| Life Technologies Inc. | Frederick, MD 21704-8354 |
| Litton Sys | College Park, MD 20740-3808 |
| Lowe House Office Building | Annapolis, MD 21401-1991 |
| LUKE PAPER CO | LUKE, MD |
| MACK TRUCKS INC. | HAGERSTOWN, MD 21742 |
| Man & Machine | Hyattsville, MD 20785-2326 |
| MARADA INDUSTRIES INC | WESTMINSTER, MD 21157 |
| MARQUIPWARD UNITED | COCKEYSVILLE, MD 21030 |
| Martin Marietta Magnesia Specialties, Inc. | Glen Burnie, MD 21060 |
| MARYLAND & VIRGINIA MILK PRODUCERS COOPERATIVE ASSOCIATION | LAUREL, MD 20723 |
| MARYLAND CHEMICAL CO INC | BALTIMORE, MD 21230 |
| MARYLAND CORRECTIONAL INSTITUT | HAGERSTON, MD 21740 |
| Maryland Dept. of Natural Resources | Annapolis, MD 21401 |
| Maryland Dept. of the Environment | Baltimore, MD 21224 |
| Maryland Dept. of the Environment | Baltimore, MD 21230 |
| Maryland Energy Administration | Annapolis, MD 21403 |
| MARYLAND PAVING INC | TIMONIUM, MD 21093 |
| Maryland Public Interest Research Group | Baltimore, MD 21218 |
| Maryland, Talbot County/ Office Economic Dev. | Easton, MD 21601 |
| Maryland, University of | Cambridge, MD 21613-0775 |
| Maryland, University of | College Park, MD 20742 |
| Maryland, University of | College Park, MD 20742-2115 |
| Maryland, University of | Princess Anne, MD 21853 |
| Maryland, University of School of Pharmacy | Baltimore, MD 21201-1142 |
| Maryland, University of-Baltimore County | Baltimore, MD 21228 |
| Maryland, University of-Baltimore County | Baltimore, MD 21250 |
| MathPro, Inc. | Bethesda, MD 20827-0404 |
| MCCORMICK PAINT WORKS CO | ROCKVILLE, MD |
| MCCORMICK PAINT WORKS CO | ROCKVILLE, MD 20851 |
| MCCORMICK SPICE MILL | HUNT VALLEY, MD 21031 |
| McKesson Bioservices Corp. | Gaithersburg, MD 20879-3546 |
| MD&VA MILK PRODUCERS COOP ASSN | LAUREL, MD 20725 |
| Medimmune | Frederick, MD 21703 |
| Meridian | Columbia, MD 21046 |
| METTIKI COAL CORP. | OAKLAND, MD 21550 |
| METTIKI COAL LLC | OAKLAND, MD |
| Mettiki Coal Llc | Oakland, MD 21550 |
| Mettiki Coal Wv, Llc | Oakland, MD 21550 |
| Microelectronic Research Lab | Columbia, MD 21045-1924 |
| MID ATLANTIC FINISHING CORP | CAPITOL HEIGHTS, MD 20743 |
| Mid-Atlantic Regional Air Management Assoc. | Baltimore, MD 21286 |
| MIDDLE RIVER AIRCRAFT SYSTEMS | BALTIMORE, MD 21220 |
| Middle River Aircraft Systems | Baltimore, MD 21220-4201 |
| MILLENNIUM INORGANIC CHEMICALS | BALTIMORE, MD 212261899 |
| MILLENNIUM INORGANIC CHEMICALS INC HAWKINS POINT PLANT | BALTIMORE, MD |
| MILLENNIUM SPECIALTY CHEM. INC | BALTIMORE, MD 21224 |
| MILLENNIUM SPECIALTY CHEMICALS | BALTIMORE, MD 21222 |
| MIRANT CHALK POINT GENERATING STATION | AQUASCO, MD 20608 |
| MIRANT CORP MORGANTOWN GENERATING STATION | NEWBURG, MD 20664 |
| MIRANT DICKERSON GENERATING STATION | DICKERSON, MD 20842 |
| Montgomery Co. Government | Rockville, MD 20850 |
| Montgomery County Maryland | Rockville, MD 20849 |
| Morgan State University | Baltimore, MD |
| MORINGSTAR FOODS LLC | FREDERICK, MD 21701 |
| Mountaineer Mining Corporation | Berlin, MD 15530 |
| MURRY'S INC | UPPER MARLBORO, MD 207722673 |
| NASA/GSFC | Greenbelt, MD 20771 |
| National Asphalt Pavement Association | Lanham, MD 20706 |
| National Institute of Health | Bethesda,, MD 20892 |
| National Institute Standards & Technology/ NIST | Gaithersburg, MD 20899 |
| National Naval Medical Center | Bethesda, MD 20889-5600 |
| National Oceanic & Atmos. Adm./NOAA/NEDIS | Camp Springs, MD 20746 |
| National Oceanic & Atmos. Adm/ NOAA | Silver Spring, MD 20910 |
| National Weather Service | Silver Spring, MD 20910 |
| NAVAL SURFACE WARFARE CENTER - | INDIAN HEAD, MD 206405035 |
| Navy Avionics | Baltimore, MD 21203-1521 |
| Neighborcare Infusion | Baltimore, MD 21202-6000 |
| Neuro Probe Inc. | Gaithersburg, MD 20877 |
| NEUTRON PRODUCTS INC | DICKERSON, MD 208420068 |
| NEVAMAR COMPANY, LLC | ODENTON, MD 21113 |
| New Horizon Diagnostics | Columbia, MD 21045-2025 |
| New Horizons Diagnostics Corp. | Columbia, MD 21045-2024 |
| NIH | Laurel, MD 20708 |
| NIH- NCI, SAIC Frederick Inc. | Frederick, MD 21702 |
| NIH-Food & Drug Administration | Bethesda, MD 20892-5760 |
| NIH-National Institute of Allergies | Bethesda, MD 20892-5760 |
| NIH-National Institutes of Arthritis | Bethesda, MD 20892-5760 |
| NIH-National Institutes of Health | Bethesda, MD 20892 |
| Niro-Fielder Inc. | Columbia, MD 21045-1929 |
| North American Biological (NABI) | Rockville, MD 20852-1834 |
| North American Vaccine Inc. | Beltsville, MD 20705-4223 |
| NORTHROP GRUMMAN SYSTEMS CORP | BALTIMORE, MD 21203 |
| Novavax Inc. | Columbia, MD 21046-1280 |
| NOXELL CORP | HUNT VALLEY, MD 21030 |
| Nutramax Laboratories Inc | Edgewood, MD 21040 |
| Ocean City, Town of | Ocean City, MD 21843 |
| OLDCASTLE RETAIL INC (DBA BONSAL AMERICAN) | WHITE MARSH, MD 21162 |
| Oncor | Gaithersburg, MD 20877-2143 |
| ONGUARD CLARK ROAD | HAVRE DE GRACE, MD 21078 |
| Optelecom | Gaithersburg, MD 20877-1467 |
| Orbital | Germantown, MD 20874-1110 |
| OWENS CORNING JESSUP ROOFING & ASPHALT PLANT | JESSUP, MD 20794 |
| PACE, INC. | ANNAPOLIS JUNCTION, MD 20701 |
| Pacific Northwest National Laboratory | Rockville, MD 20850 |
| Panda Energy International, Inc. MD | Brandywine, MD 20613 |
| Parsons | Gaithersburg, MD 20886 |
| Partanen, William E. | Easton, MD 21601 |
| PDA | Bethesda, MD 20814 |
| Pegasus Technologies | Rockville, MD 20850 |
| PEMCO CORP | BALTIMORE, MD 21224 |
| PERDUE FARMS INC BERLIN FEED MILL | BERLIN, MD 21811 |
| PERDUE FARMS INC SALISBURY PROCESSING PLANT | SALISBURY, MD 21802 |
| PERDUE FARMS INC. | SHOWELL, MD 21862 |
| PERDUE FARMS, INC. | SALISBURY, MD 21804 |
| Perkin Elmer Fluid Sciences | Beltsville, MD 20705-1294 |
| PERRYMAN GENERATING STATION | BALTIMORE, MD 21226 |
| PETROLEUM FUEL & TERMINAL CO | BALTIMORE, MD 21224 |
| PETROLEUM FUEL & TERMINAL CO BALTIMORE NORTH | BALTIMORE, MD 21205 |
| PG&E National Energy Group Bethesda1 | Bethesda, MD 20814 |
| PG&E National Energy Group Bethesda2 | Bethesda, MD 20814-6161 |
| Pharmaceutics International | Hunt Valley, MD 21031-1306 |
| PHOENIX COLOR CORP | HAGERSTOWN, MD 21740 |
| PINE MOUNTAIN COAL COMPANY, IN | FROSTBURG, MD 21532 |
| Plasticoid Co, Inc | Elkton, MD 21921-5247 |
| PLYMOUTH TUBE CO | SALISBURY, MD 21801 |
| Post Buckley, Schuh & Jernigan | Beltsville, MD 20705 |
| Pral Laboratories, Inc. | Baltimore, MD 21215 |
| Prince George's Co. - Dept. Enviro Resources | Largo, MD 20774 |
| Princeton Energy Resources International | Rockville, MD 20852 |
| Quality Biological | Gaithersburg, MD 20879-5412 |
| RAVEN ROCK MTN COMPLEX/SITE R | FORT DETRICK, MD 21702-5029 |
| REDLAND BRICK INC CUSHWA PLANT | WILLIAMSPORT, MD |
| RELIANCE TREATED WOOD INC | FEDERALSBURG, MD 21632 |
| RHODIA INC | BALTIMORE, MD 21226 |
| Riordan Materials Corporation | Crofton, MD 21114-3404 |
| Riordan Materials Corporation | Forest Hill, MD 21050 |
| Riordan Materials Corporation | Millersville, MD 21108 |
| Ritchie Trucking & Excavating, | Frostburg, MD 21532 |
| ROCKLAND BLEACH & DYE WORKS | BALTIMORE, MD |
| ROCKWOOD PIGMENTS NORTH AMERICA INC | BELTSVILLE, MD 20705 |
| RUST-OLEUM CORP | WILLIAMSPORT, MD 21795 |
| SAFETY-KLEEN SYSTEMS (201601) | BALTIMORE, MD 21230 |
| SALISBURY (ZCR)FEED & GRAIN | SALISBURY, MD 21802 |
| SAPUTO CHEESE USA INC. | HANCOCK, MD 21750 |
| SASOL NA INC | BALTIMORE, MD 21226 |
| Savage Mountain Minerals, Inc. | Barton, MD 21521 |
| Science Applications Int'l Corp. | Frederick, MD 21702-1201 |
| SHERWIN-WILLIAMS CO | BALTIMORE, MD 21230 |
| SHERWIN-WILLIAMS CO. | HAVRE DE GRACE, MD |
| Shire Laboratories | Rockville, MD 20850 |
| Shire Pharmaceutical Development Inc. | Rockville, MD 20850 |
| Shire USA Manufacturing | Owings Mills, MD 21117-6254 |
| Shire-1 | Owings Mills, MD 21117 |
| SIGNODE EASTERN OPERATIONS | BALTIMORE, MD 21219 |
| SOLO CUP OPERATING CORP | OWINGS MILLS, MD 21117 |
| SOUTHERN GALVANIZING CO | BALTIMORE, MD 21230 |
| SPARTECH FCD LLC | SALISBURY, MD |
| Specific Fibrosis Services Pharmacy | Bethesda, MD 20814-5231 |
| Spectra | Clarksburg, MD 20871 |
| SPIRENT COMMUNICATIONS | GAITHERSBURG, MD 20877 |
| St Lawrence Cement | Hagerstown, MD 21742-0650 |
| ST. LAWRENCE CEMENT | HAGERSTOWN, MD 21742 |
| STANDARD FUSEE CORP | EASTON, MD 21601 |
| Sternberger Monoclonal Inc. | Baltimore, MD 21224 |
| Stifel, Nicolaus & Company | Baltimore, MD 21202 |
| STONE INDUSTRIAL | COLLEGE PARK, MD 20740 |
| SUN CHEMICAL CORP GPI | WILLIAMSPORT, MD 21795 |
| SUPERIOR CONCRETE MATERIALS INC AJ PLANT | LANHAM, MD 20706 |
| Swales & Association | Greensbelt, MD 20771 |
| Swales Aerospace | Beltsville, MD 20705 |
| TAMKO BUILDING PRODUCTS INC. | FREDERICK, MD 21703 |
| TATE ACCESS FLOORS INC. | JESSUP, MD 20794 |
| Tate Access Floors, Inc. | Jessup, MD 20794 |
| Tektron Micro Electronics | Hanover, MD 21076-3142 |
| TERUMO MEDICAL CORP | ELKTON, MD 21921 |
| Terumo Medical Corp. | Elkton, MD 21921-5322 |
| THALES COMMUNICATIONS INC | CLARKSBURG, MD 20871 |
| The Plasticoid Co. | ELKTON, MD 21921 |
| Therimmune Research Corp. | Gaithersburg, MD 20878 |
| THOMAS MANUFACTURING CORP | PARKTON, MD 21120 |
| TILLEY CHEMICAL CO. INC | BALTIMORE, MD 21220 |
| TNEMEC CO INC | BALTIMORE, MD 21222 |
| Tousimis Research | Rockville, MD 20851-2333 |
| TRANS-TECH INCORPORATED | ADAMSTOWN, MD 21710 |
| TRANS-TECH, INC. | ADAMSTOWN, MD 21710 |
| Trinity Labs/DAS Lab | Salisbury, MD 21801-2249 |
| Tri-Star Mining Inc | Barton, MD 21521 |
| TYSON FOODS INC. - BERLIN | BERLIN, WORCESTER CO, MD 21811 |
| U. S. Filter | Timonium, MD 21093 |
| U.S. Air Force | Andrews Air Force Base, MD 20762 |
| U.S. Army - Aberdeen Test Center | Aberdeen Proving Ground, MD 21005-5059 |
| U.S. ARMY ABERDEEN PROVING GRO | EDGEWOOD, MD 21010 |
| U.S. ARMY ABERDEEN PROVING GROUND | ABERDEEN PROVING GROUND, MD |
| U.S. Army Corps of Engineers | Baltimore, MD 21201 |
| U.S. ARMY DIRECTORATE OF PUBLIC WORKS FORT GEORGE G. MEADE | FORT GEORGE G MEADE, MD |
| U.S. Army -Edgewood Chemical Biological Ctr. | Aberdeen Proving Ground, MD 21010-5424 |
| U.S. Army Envr. Ctr./Booz,Allen & Hamilton | Abingdon, MD 21009 |
| U.S. Army Envr.Ctr./ SFIM-AEC-ETD | Aberdeen Prov.Ground, MD 21010-5401 |
| U.S. Army Research Lab | Aberdeen Proving Ground, MD 21005 |
| U.S. Army Research Lab/ AMSRL-WM-M | Aberdeen Proving Ground, MD 21005 |
| U.S. Army/ Edgewood Chemical Biolog.Ctr. | Aberdeen Proving Ground, MD 21010-5403 |
| U.S. Army/ USA CHPPM | Aberdeen Prov.Ground, MD 21010-5403 |
| U.S. Army/Environmental Center | Aberdeen Proving Ground, MD 21010 |
| U.S. Army/Research Lab | Aberdeen Proving Ground, MD 21005 |
| U.S. CHPPM | Aberdeen Proving Gro, MD 21005 |
| U.S. Coast Guard | Bethesda, MD 20817 |
| U.S. Department of Agriculture/Research Center | Beltsville, MD 20705 |
| U.S. Department of Commerce | Gaithersburg, MD 20899 |
| U.S. Department of Defense | Aberdeen Prov.Ground, MD 21010-5424 |
| U.S. Department of Energy | Germantown, MD 20874 |
| U.S. Department of Energy/Tech & Mngmnt.Srvcs. | Gaithersburg, MD 20879 |
| U.S. DEPARTMENT OF HOMELAND SECURITY FLETC CHELTENHAM MD | CHELTENHAM, MD 20623 |
| U.S. Department of the Navy/Indian Head Dv. | Indian Head, MD 20640 |
| U.S. EPA/ Chesapeake Bay Program | Annapolis, MD 21403 |
| U.S. GYPSUM CO | BALTIMORE, MD 21226 |
| U.S. NATL. PARK SERVICE CATOCTIN MOUNTAIN PARK (CATO) | THURMONT, MD 21788 |
| U.S. Naval Academy/ Chemistry Dept. | Annapolis, MD 21402 |
| U.S. Navy | Indian Head, MD 20640 |
| U.S. Navy - NAVAIR/EPA | Patuxent River, MD 20670 |
| U.S. NAVY NAVAL SUPPORT FACILITY INDIAN HEAD | INDIAN HEAD, MD 20640 |
| U.S. Navy - Naval Surface Warfare Center | West Bethesda, MD 20817 |
| U.S. Navy /Ecosys. Mngmnt. & Assoc./NAVAIR | NAS Patuxent River, MD 20670 |
| U.S. Navy -NAVEODTECHDIV | Indian Head, MD 20640 |
| U.S. Navy OESO | Indian Head, MD 20640-1541 |
| U.S. NAVY PATUXENT RIVER NAVAL AIR STATION | PATUXENT RIVER, MD |
| U.S. Navy/ NAVAIR | Patuxent River, MD 20670-1534 |
| U.S. Navy/ NAVAIR Research & Engineering | Patuxent River, MD 20670 |
| U.S. Navy/ NAWCAD | Patuxent River, MD 20670 |
| U.S. Navy-Naval Surface Warfare Center | Indian Head, MD 20640 |
| U.S. Nuclear Regulatory Commission | Rockville, MD 20852-2738 |
| U.S. Pharmacopeia (USP) | Rockville, MD 20852 |
| U.S. PUBLIC HEALTH SERVICE NATIONAL INSTITUTES OF HEALTH | BETHESDA, MD 20892 |
| UMUC Graduate School | Adelphi, MD 20783 |
| University Research Foundation | Columbia, MD 21045-1924 |
| UPPER POTOMAC RIVER COMM STP | WESTERNPORT, MD 21562 |
| US MARINE/ BRUNSWICK FAMILY BOATS CO INC | CUMBERLAND, MD 21502 |
| US MARINE/BRUNSWICK FAMILY BOAT CO INC | CUMBERLAND, MD 21502 |
| US MARINE/BRUNSWICK FAMILY BOAT CO INC. | SALISBURY, MD 21801 |
| Us Navy-Integrated Systems Solutions | Patuxent River, MD 20670-5409 |
| US Pharmacopeia | Rockville, MD 20852 |
| US Pharmacopia | Rockville, MD 20852-1790 |
| USA CHPPM | Aberdeen Prov.Ground, MD 21010 |
| USDA ARS BELTSVILLE AGRICULTURAL RESEARCH CENTER | BELTSVILLE, MD |
| USEC PDGDP | PADUCAH, KY 42001 |
| VELSICOL CHEMICAL CORP | CHESTERTOWN, MD 21620 |
| VELSICOL CHEMICAL CORP. | CHESTERTOWN, MD 21620 |
| VERTIS INC | BALTIMORE, MD |
| VIENNA GENERATING STATION | VIENNA, MD |
| Vindex Energy Corporation | Mountain Lake Park, MD 21550 |
| Vindex Energy Corporation | Mountain Lake Park,, MD 21550 |
| Vindex Energy Corporation | Mountain Lake, MD 21550 |
| Vindex Energy Corporation | Oakland, MD 21550 |
| Virginia Micro Services | Capitol Heights, MD 20743 |
| W L Gore & Associates | Elkton, MD 21922-1550 |
| W L Gore & Association | Elkton, MD 21921-3917 |
| W R GRACE & CO - CONN COLUMBIA | COLUMBIA, MD 21044 |
| W. L. GORE & ASSOCIATES INC. | ELKTON, MD 21922 |
| W.L. Gore & Associates, Inc. | Elkton, MD 21921 |
| WABTEC RAILWAY ELECTRONICS | GERMANTOWN, MD 20876 |
| WALDORF MARBLE INC | WHITE PLAINS, MD |
| WALKER BROTHERS MINING, INC. | LAVALE, MD 21502 |
| Walter Reed Army Institute of Research | Silver Spring, MD 20910 |
| Wartsila North America, Inc. | Annapolis, MD 21401 |
| Washington Biotechnology Inc. | Bethesda, MD 20814-5211 |
| Washington Suburban Sanitary Comm. | Laurel, MD 20707 |
| Washington Suburban Sanitary Commission | Laurel, MD 20707 |
| Waste Policy Institute | Germantown, MD 20874 |
| Western Branch Wastewater Treatment Plant | Upper Marlboro, MD 20772 |
| Westinghouse Electric Corp | Baltimore, MD 21203 |
| Westminster(MD) City of | Westminster, MD 21157 |
| Westminster(MD) City of | Westminster, MD 21158 |
| Westvaco Corp./ Nissan Tech. Ctr. | Laurel, MD 20723-6006 |
| Westvaco Corporation | Luke, MD 21540 |
| WHITE CAP CONSTRUCTION SUPPLY (WC0207) | HYATTSVILLE, MD 20781 |
| White Energy Coal North America, Inc. | Rockville, MD 20850 |
| Whittaker Bioproducts | Walkersville, MD 21793-8415 |
| Wilcoxon Research, Inc. | Gaithersburg, MD 20878-1703 |
| WL Gore & Associates | Elkton, MD 21922 |
| WM. T. BURNETT & CO. | JESSUP, MD 20794 |
| WORTHINGTON STEEL CO | BALTIMORE, MD 21221 |
| XERXES CORP | WILLIAMSPORT, MD 21795 |