EXXON

Chester Water Authority

New Jersey State Police

Jiffy Lube

City Of Philadelphia

Pepsi Cola

Sunoco

Franklin Mint

Bell Atlantic

Mobil Corporation

PECO

University of Pennsylvania

Boeing Vertol

PENDOT

Johnson Matthey

United States Postal Service

SEPTA

Philadelphia International Airport

AT&T

Pennsylvania Turnpike Commission

American Sweeteners

New Jersey Turnpike Commission

Penn Moor Chemicals

Roadway Express, Inc.

Penn Engineering & Mfg.

Spray Products, Inc.

Sprint

Brown & Root Environmental