Drawdown Pumps

APSCO Inc.

Buffalo Well Products

Enviro Products Inc.

EPG Companies Inc.

Geotech Environmental Equipment

Grundfos Pumps Corp.

QED Environmental Systems Inc.

Wellmaster Pipe & Supply Inc.

Ground Water Pumping Equipment

AMS Inc.

APSCO Inc.

Atlantic Screen & Mfg. Inc.

Buffalo Well Products

Campbell Manufacturing Inc.

Carbonair Environmental Systems Inc.

Enviro Products Inc.

EPG Companies Inc.

Flint & Walling Inc.

Flomatic Valves

Geotech Environmental Equipment

Gorman-Rupp Co.

Grundfos Pumps Corp.

Keck Instruments Inc.

Layne & Bowler

National Well Supplies Co. Inc.

North East Environmental Products

QED Environmental Systems Inc.

TIMCO Manufacturing Inc.

Trident Tool Inc.

Wesley Co. (The)

Hydrocarbon Detection/Recovery Equipment

AMS Inc.

APSCO Inc.

Atlantic Screen & Mfg. Inc.

Biomin Inc.

Buffalo Well Products

Campbell Manufacturing Inc.

Carbonair Environmental Systems Inc.

Clean Earth Technology Inc.

Environmental Manufacturing Inc.

Enviro Products Inc.

EPG Companies Inc.

Geotech Environmental Equipment

Keck Instruments Inc.

National Well Supplies Co. Inc.

North East Environmental Products

QED Environmental Systems Inc.

Testwell Instruments

TIMCO Manufacturing Inc.

Waterline Envirotech Ltd.

Wellmaster Pipe & Supply Inc.

Recovery Pumps

APSCO Inc.

Atlantic Screen & Mfg. Inc.

Buffalo Well Products

Clean Earth Technology Inc.

Enviro Products Inc.

EPG Companies Inc.

Geotech Environmental Equipment

Keck Instruments Inc.

National Well Supplies Co. Inc.

North East Environmental Products

QED Environmental Systems Inc.

TIMCO Manufacturing Inc.

Wellmaster Pipe & Supply Inc.

Skimming Pumps and Devices

APSCO Inc.

Atlantic Screen & Mfg. Inc.

Buffalo Well Products

Clean Earth Technology Inc.

Enviro Products Inc.

EPG Companies Inc.

Geotech Environmental Equipment

Hydro Quip Inc.

Keck Instruments Inc.

Kilman Electriloc Inc.

National Well Supplies Co. Inc.

QED Environmental Systems Inc.

Testwell Instruments

Soil Sampling Tools

AMS Inc.

Atlantic Screen & Mfg. Inc.

Buffalo Well Products

Central Mine Equipment Co.

Ditch Witch/The Charles Machine Works Inc.

Foremost Mobile

GEFCO -- The George E. Failing Co.

Keck Instruments Inc.

KVA

Mills Machine Co.

Solinst Canada Ltd.

Other

Biomin Inc.

Campbell Manufacturing Inc.

EPG Companies Inc.

Foremost Mobile

Geotech Environmental Equipment

Hydro Quip Inc.

Keck Instruments Inc.

KVA

QED Environmental Systems Inc.

Rockware Inc.

SAGA Geophysics Inc.

Testwell Instruments

U.S. Filter/Johnson Screens

Waterline Envirotech Ltd.

Wesley Co. (The)