Alco Standard Corp. Aramark Corporation ARCO Avery Dennison Berger Building Products Corp. Betzdearborn Corp. Campbell Soup Co Cardon Industries, Inc. Congoleum Corp. Defense Industrial Supply Dupont General Electric Nuclear Energy Hough Petroleum Lockheed Martin Corp. Martin Marietta Space Division PA Castle Energy Peco Energy Raytheon Engineers & Construction Sloan Automotive Corp Stone Container Corporation Sun Company, Inc. SYSCO Food Services Inc. Tolas Health Care Packaging Trigen Philadelphia Energy Corp. Wakefern Foods Corp. Wells Fargo Alarm Services Inc. Westinghouse Electric Co. White Glove Car Wash, Inc.