OWNERS

Afton Chemical Corporation

Ameren Energy Generating Co.

Dynegy Generation

Olin Brass

Prairie State Generating Co. LLC

Shell Lubricants Wood River Plant

Solutia, Inc.

U.S. Steel Granite City Works

CONSTRUCTION ASSOCIATES

A.D. Lift Truck

Acme Constructors, Inc.

Aetna Coatings, Inc.

Aggreko Inc.

Aker Solutions part of Aker

Alberici Constructors

Ambitech Engineering Corporation

Analytic Stress Relieving, Inc.

Anderson Electric, Inc.

BakerCorp

Bechtel Construction Co. Bechtel Power Corporation

Berco Industrial, Inc.

Bollmeier Inc.

Bolttech, Inc.

Brand  Energy Services, LLC

Budrovich, Inc.

Burns & McDonnell

Byrne and Jones Construction

C&C Construction

Car-ber Testing Services, Inc.

Cassidy Construction Services, Inc.

Catalyst Services, Inc.

CBI Services, Inc.

CDG Engineers

CenterPoint Energy - MRT

Cherne Contracting Corp.

Circle "T" Steel Co.

Code Red Safety & Rentals

Concrete Supply of Illinois

Construction Safety Services, Inc.

Construction & Turnaround Services, LLC "InServ"

Continental Fabricators Inc.

Cooling Components Inc.

Corrigan Company Mechanical Contractors

Coyle Supply, Inc.

Crawford, Murphy, & Tilly, Inc.

CTI Field Services, Inc.

Day & Zimmermann NPS

Eagle Services Corporation

Emerson Process Management

Enerfab Inc.

Environmental Operations, Inc.

Environmental Products, Inc.

Eveready Energy Services, Inc.

Experitec, Inc.

ExPro Midwest

Farmer Environmental Service LLC

Federal Steel & Erection Co.

Ferguson Company

Fire Safety, Inc.

Fluor Constructors International, Inc.

France Mechanical Corp.

Fred Weber, Inc.

G.L. Warren Construction, Inc.

G.R.P. Company, Inc.

Gateway Regional Medical Center

Global Safety

Goedecke Industrial Service

Gross Mechanical Contractors, Inc.

Guarantee Electrical Company

Haberberger, Inc. Mechanical Contractors

Hartman Walsh Corporation

Hayden Wrecking Corp.

Hayward Baker, Inc.

Helmkamp Construction Co.

Heritage Environmental Srvs., LLC

Hertz Equipment Rental, Inc.

Hoerbiger Service

HydroChem Industrial Srvs. Inc.

ICON Mechanical

Illinois Electric Works, Inc.

Industrial Distribution Group, Inc. (IDG)

Industrial Rental & Supply

In-land Technologies Service, Inc.

International Chimney Corp/ Karrena International

IWR Building Systems, LLC

J.F. Electric, Inc.

John Sakach Co. of St. Louis

Kirberg Company, Inc.

Kuenz Heating &  Sheet Metal Co.

L. Keeley Construction Co.

Lake Contracting, Inc.

Lewis & Clark Community College

Liberty Improvements, LLC

Lifting Gear Hire Corp.

Lowry Electric Company

M.D. Magary Construction Refractories & Acid Brick

Madison Industrial Services Team, Ltd.

Maintenance Unlimited Janitorial, Inc.

Marcal Rope & Rigging

Matrix Service Inc.

MC Industrial An Independent McCarthy Co.

Metro Insulation, Inc.

Middough Consulting, Inc.

Mid-States Supply

Midwest Aerials & Equipment Inc.

Midwest Machinery Co.

Midwest Occupational Medicine (MOM)

Mike's Inc.

Moore Painting Company

Morrison Construction

Munie Greencare Professionals

Murphy Company

N&J Railroad Contractors

National Safety Consulting

National Sales Co.

Nooter Construction

OILIND Safety

Pangea, Inc.

Patent Construction Sys./ Harsco

PayneCrest Electric & Communications

Petrel Group, Ltd.

Phone Masters, LTD.

PICOR

Plant Maintenance Services, LLC

Plocher Construction Co.

Power Maintenance &  Constructors, LLC (PMC)

Premier Insulation, LLC

PSC

Quad County Ready Mix Corp.

R. Knepper Construction

Rain For Rent

RCS Construction, Inc.

RED-D-ARC Welderentals

Rhodia, Inc.

Rock Hill Mechanical Corporation

RSC Equipment Rental

Sachs Electric

Safety Partners LTD

Sargent & Lundy LLC

Scheck Industrial Corporation

Selsius Corporate & Career Training (SWIC)

Shared Systems Technology, Inc. CDA

Sheppard, Morgan & Schwaab Inc.

Superheat FGH Services, Inc.

Tarlton Corporation

Team Industrial Services

Terracon Consultants

The Fabick Companies Fabick Cat

Thiems Construction

Thyssen Krupp Safway, Inc.

Tremco Inc.

United/Anco Services, Inc.

URS Corp.

United Rentals, Inc.

Venetian Terrazzo Co., Inc.

Veolia ES Industrial Services, Inc.

Waggoner Equipment Co.

Washington Division of URS

Water Cooling Equipment, Inc.

Wegman Electric Co.

Widman Construction, Inc.

Woolpert, Inc.

Wright Industrial, Inc.