Barber Foods

Bayer Diagnostics

Bowdoin College

Central Maine Power Company

Cianbro

ConAgra Poultry Company

Corning Incorporated

CPM Constructors

Fairchild Semiconductor

H. P. Hood, Inc.

IBM

IDEXX

International Paper

Jacques Whitford, Inc.

L.L. Bean

Maine Department of Environmental Protection

Maine Department of Transportation

National Semiconductor

New Page (formally MeadWestvaco)

Oakhurst Dairy

PACTIV Corporation

Phillips Exeter Academy

Portland, City and Public School System

Portland Water District

Pratt & Whitney, a unit of United Technologies

Quantum Clean

Radlo Brothers, Inc.

Sanborn, Head & Associates, Inc.

Sanderson Farms, Inc.

S.W. Cole Engineering, Inc.

Timberland

Townsends, Inc.

Whatman, Inc.

Woodard & Curran, Inc.

Woodlot Alternatives, Inc.