3M Company

A.E. Staley Company
A.P. Green Refractories
ACF Industries
Air-Kleen Damper Co.
Airex Ltd.
Allied Chemical
Amax, Inc. – Smelter Division
American Air Filter Co.
American Felt and Filter
Ansconda Aluminum
Arco Aluminum
Arizona Public Services
Atlas Steel
Austell Box Board Corp.

Baltimore Gas and Electric
Barcroft Co.
Barton and Leguidice
Basin Electric Power Corp.
Belco Air Pollution Control Corp.
BOF Maintenance Division
Brooks-McMichaels Corp.

C-E Air Preheater
C.P. Environmental, Inc.
Cadre Environmental Systems, Inc.
Celanese Fibers Co.
Chattanooga Sewing and Sales Co.
Chemstone
City of Vineland
Colt Industries
Combustion Engineering, Inc.
Corning Glass

Dayton Power and Light
DOE
Donaldson Co., Inc. – Torit Division
Douglas Battery

E.I. DuPont
East Kentucky Power Corp.
East Penn Manufacturing Co.
Englehard Corp.
Enviro-Systems
ES&R
Exxon Research and Engineering Co.

Fieldcrest Mills, Inc.
Fort Howard Paper Co.

General Electric Environmental
Georgetown Steel
Globe Battery – Johnson Control
Great Lakes Forest Products Sherex Chemical Co.
Griffin Environmental Co., Inc.

Hayes, Seay, Mattern & Mattern
Hercules Southern Company Services
Houston Lighting and Power Co.

ICGS Corp.
Industrial Gas Cleaning Institute
Inta-Roto Corp.
Intalco Aluminum Corp.
IPS

J&L Steel
Jack Daniels Distillery

Kennecott
Kerr-McGee Corp.

Lafarge Consultants Ltd.
Lone Star Steel
Luck Stone
Lynchburg foundry Tried Ltd.

Martin Marietta Corp.
Mayo-Pennwalt Corp.
McCarter Union Carbide
Merck Chemical Manufacturing Co.

N&W Foundry
Nanes Corp.
National Filter Media
Naval Fsc. Engrg. Command
NLO, Inc.
Northrop Services, Inc.

Ohio Edison Co.

PGS Corp.
Philadelphia Electric Co.
Piqua Municipal Power Systems
Pittsburgh Corning Glass
PPG Industries, Inc.
Procter and Gamble
Public Service Electric and Gas
Puget Sound Naval Shipyard