Aramco Services Company

Associated Milk Producers, Inc.

BASF

Bechtel Power Corp.

Brown & Root, Inc.

Campbell’s Soup Co.

Claudius Peters, Inc.

Custodis-Cottrell, Inc.

Diamond Shamrock Corp.

Fluor-Daniel

Graver Water

Guardian Industries Corp.

Gulf Oil

International Paper Company

Kimberly-Clark Corp.

Nordstrom Valves, Inc.

Ocean Spray Cranberries, Inc.

Owens-Corning Fiberglass Corp.

PCI Engineers, Inc.

Phillips Petroleum

Polysius Corporation

Raytheon

Rockwell International

Southwest Airlines

Structural Metals, Inc.

Texas Instruments

Tyler Pipe Industries, Inc.

TXU Electric

Witco Chemical Company