• Claude Laval Corporation

• Corrosion Restoration Technologies

• Dynapac

• Earth Systems Southern California

• Goldak Inc.

• H.P.G. International

• Pittsburgh Manufacture & Installers

• Radiodetection Corp.

• Remedial Construction Services

• Schonstedt Instrument Company

• Schramm, Inc.

• Superior Signal Co.

• Zircon Corp.