CONSULTING ENGINEERS

• AETC
• BBL
• BCM Engineers
• Bendix Field Engineering Co.
• Black & Veatch
• Boucher & James Engineers
• Carroll Engineering Corp.
• Castle Valley Consultants
• CDM
• Cowan Associates
• Dames & Moore
• ENVIRON
• ERM Group
• Geo Environmental
• ICF/Kaiser
• International Environmental Eng.
• IT Corp.
• JACA Corporation
• Law Environmental
• Lawler, Matusky & Skelly
• Lippincott Engineers
• Louis Berger Assoc.
• M & M Engineers
• Malcolm Pirnie
• Mast Engineers
• Meiser & Earl
• Morrison Knudsen
• Motley Engineering Co.
• O'Brien & Gere
• Pennoni Associates
• Roy F. Weston
• RT Environmental
• Scott R. Smith, Inc.
• Spotts, Stevens & McCoy
• Stone & Webster
• Tatman & Lee Assoc.
• Technicon Enterprises
• Tri-State Engineers
• Unitech Engineers
• Urwiler & Walter, Inc
• Versar

GOVERNMENT AGENCIES

• Bucks County Planning Commission
• City of Philadelphia
• Commonwealth of Pennsylvania
• Department of Defense
• Department of Veterans Affairs
• Jefferson County Community Dev. Dept.
• KY Natural Resources and Environmental Protection Cabinet
• KY Finance Administration
• KY Fair and Exposition Center
• NASA
• Naval Air Development Center
• NJ Dept. of Environmental Protectio
• NY City Department of General Services
• NY City Health & Hospitals Corporation
• NY City Mass Transit Authority
• NY School Construction Authority
• NY State Dept. of Environmental Conservation
• OH Bureau of UST Regulations
• PA Dept. of Environmental Resources
• PA Turnpike Commission
• PA State Deep Mine Safety Commission
• U.S. Army Corp. Of Engineers
• U.S. Dept. of Energy
• U.S. Geological Survey
• U.S. Forest Service
• U.S. Military Academy at West Point
• U.S. States Navy
• U.S. Post Office
• U.S. Trust Company
• United Nations
• World Bank

FOREIGN GOVERNMENTS

• Greek Institute of Geology and Mineral Exploration
• Instituto Mexicano del Petroleo
• Republic of the Congo
• Republic of Indonesia
• Republic of the Phillippines
• Republic of Zambia

SURFACE MINES

• Alliance Sand Co.
• M & M Stone
• General Refractories
• Refractory Sand Co.
• Groff Estates
• Pottstown Trap Rock

WATER & SEWER AUTHORITIES, UTILITIES & MUNICIPALITIES

• Allentown, Municipal Golf Course
• Appalachian Power Company
• Atlantic County
• Bedminster Township
• Boyertown Area School District
• Buckingham Twp. Mun. Auth.
• Bucks Co. Water & Sewer Auth.
• City of Yonkers
• County of Westchester
• Delaware Electric Company
• Douglass Twp., Montgomery Co.
• Douglass Twp., Berks Co.
• Earl Township
• Fleetwood Borough Water & Sewer Auth.
• Hatfield Township
• Hilltown Twp., Bucks Co.
• Hilltown Water & Sewer Auth.
• Ithaca, City of
• Jersey Central Power & Light Co.
• Jim Thorpe Borough
• Lansford-Coaldale Water Auth.
• Louisville and Jefferson County Metropolitan Sewer District
• Louisville Water Company
• Middlesex County, NJ
• Milford Twp. Water Auth.
• Milford-Trumbauersville Water & Sewer Auth.
• New York City Dept. of Sanitation
• New York Power Authority
• Northampton, Bucks County, Municipal Auth.
• Potomac Electric & Power Company
• Quakertown Borough Water and Sewer Auth.
• Ralpho Twp. Water & Sewer Authority
• Red Hill Water Authority
• Rockland County
• Sellersville Water & Sewer Authority
• Superior Water Authority
• Telford Borough Authority
• Triborough Bridge & Tunnel Authority
• Walnutport Authority
• Warrington Township Municipal Authority
• Warwick Water & Sewer Authority
• Western Berks Refuse Authority
• White Plains Housing Authority

DEVELOPERS AND BUILDERS

• Barney Construction
• Jeffrey Blank Associates
• Leon DeMatti's Construction Corp.
• ECCO III Enterprises
• Ford Leasing and Development Corp.
• Gambone Brothers
• Glen Garis
• Lehrer McGovern Bovis
• LiRo Group
• Muller Construction
• Tishman Construction
• Toll Brothers
• Re/Max Developers
• Realty World Developers
• Rockhill Builders
• James D. Scully Co.
• Walter Wagner, Jr., Co.
• Weiner Homes
• York Hunter Construction

OIL AND MINING COMPANIES

• A.G.I.P.
• Amoco Oil Co.
• Apache Energy Inc.
• Arco
• Ashland Petroleum Company
• British Petroleum Co.
• Bunlile Oil Co.
• Chevron
• Cibro Petroleum
• Cities Services
• Coastal Oil
• Continental
• Esso Exploration
• Exxon
• Getty
• Gulf
• Hispanoil
• Kerr-McGee
• Louisiana Land and Exploration
• Marathon Oil Company
• Mobil Oil Co.
• National Lead Industries
• National Fuel
• Northwest Fuel Development
• People's Natural Gas
• Phillips Petroleum Co.
• Shell Oil Co.
• Sohio Petroleum Co.
• Sun Oil Co. SuperAmerica Group, Inc.
• Texaco
• Transcontinental Gas Pipeline
• UNO-VEN
• UNOCAL
• Valvoline

PRIVATE INDUSTRY (Representative List)

• AKZO Chemicals
• Albert Einstein Medical Center
• AM Cable TV Industries
• Ametek
• Anheuser Busch, Inc.
• Aptus Environmental Services
• Archiodese of New York
• AT&T
• Atlantic Financial
• Avery Dennison
• Bank of New York
• BASF
• Bell Atlantic
• Bellevue Hospital
• Bethlehem Steel Corp.
• Bristol Meyers/Squibb
• Browning Ferris Industries
• Budget Rent A Car Corporation
• Century 21
• Chromatex
• Citibank, N.A. (Citicorp)
• Coca Cola Enterprises, Inc.
• Congoleum
• Cooper Industries
• Cressona Aluminum Co.
• CSX
• Dairy Mart
• Davis Brothers
• Dixon Ticonderoga
• EKCO Products
• E.I. du pont Nemours & Co.
• Endicott Johnson
• Englehard Corporation
• ENSECO
• ESSROC
• Estee Lauder Companies
• Federal Express
• Figgie International
• First National Bank
• First Pennsylvania Bank
• Ford Motor Co.
• Garden State Paper
• General Electric
• General Foods Corp.
• General Motors
• Georgia Pacific Corp.
• Goodyear Tire & Rubber Company
• Hammermill Paper
• Hercules Chemical Co.
• Hershey
• Int'l Paper/Hammermill Paper
• IT Corporation
• Johnson & Johnson
• Keebler Co.
• Kentuckiana Yacht Sales
• Kentucky Kingdom Amusement Park
• Kraft Foods Service
• Krasdale Foods
• LaFarge
• Lederle Laboratories
• Liquid Carbonic Industries
• LKB Resources
• Lucas Aerospace
• Luff & Gallagher Tire, Inc.
• Marriott
• Mellon Bank
• Mercedes Benz of North America
• Merck & Company, Inc.
• Merck, Sharp, & Dohme
• Merck Pharmaceutical
• Moretrench, Inc.
• National Waste Disposal, Inc.
• National Westminster Bank
• National Lead Laboratories
• New York Hospital
• New York University
• Norfolk-Southern Railroad
• North Schuylkill Landfill Compact
• Onieda Heater
• Owensboro Grain Company
• Penske Truck Leasing
• Pitt Ohio Express
• Providian
• Quality Wallcovering
• QuickcreteŽ
• Ramapo Helicopter
• Rawlings Adirondack
• Rhone-Poulenc
• Rohm & Haas
• Rossman Velours of N.C.
• Ryder Trucking
• Safety Kleen
• Scott Paper Co.
• Scott Specialty Gases
• Sears Roebuck & Co.
• Shield Alloy Metallurgical
• Smithkline BeechamSmithkline Chemicals
• Smithsonian Institute Office of Design & Const.
• Snow Foods Division of Borden
• Syracuse Supply Co.
• U-Haul
• Union Carbide
• United Parcel Service
• United Catalysts
• Vineland Chemical Co.
• W.R. Grace Co.
• Waste Management of North America
• Wearever Pen Co.
• Westinghouse Corp.
• WITCO Chemical Co.
• Wyeth Ayerst