Commercial

• AirNet Communications Corporation
• American Home Products Corporation
• Asarco Incorporated
• Bemis Company, Inc.
• Boise Cascade Corporation
• British Petroleum Company p.l.c.
• Cardinal Construction Corp.
• Catholic University of America
• Chevron
• Citigroup Inc.
• COLAS, Inc.
• Corning Inc.
• Crane Company
• Del Monte Fresh Produce B.V.
• Dryvit
• Electronic Data Systems Corporation
• General Motors Corporation
• GlaxoSmithKline
• Hovnanian Enterprises, Inc.
• H. R. I., Inc.
• I. A. Construction Corp.
• Johnson Controls, Inc.
• Keating/Pyramid Joint Venture
• Lockheed Martin Corporation
• Louisiana Pacific Corporation
• Microsoft Corporation
• New Enterprise Stone & Lime Co., Inc.
• The Oeser Company
• Pervel Industries, Inc.
• Pfizer, Inc.
• PPG Industries, Inc.
• Philadelphia Housing Authority
• Ply Gem Industries, Inc.
• PRC, Inc.
• Pulte Homes Corporation
• The Ryland Group, Inc.
• Scott Technologies, Inc.
• SL Industries, Inc.
• Southeastern Power Administration
• Starbucks Corporation
• Suffolk Construction Company, Inc.
• U.S. Gypsum Corporation
• U.S. Mineral Products Co.
• United Technologies Corporation
• Waite Hill Assurance Ltd.
• Wang Government Services, Inc.
• Wausau Insurance Companies
• Whitaker Roads Corporation