Sumas Environmental Services Inc.

AGRA Earth & Environmental Ltd., Cushman-Ball Environmental, EBA Engineering Consultants Ltd., Golder Associates Ltd., Hemmera Consultants Ltd., Keystone Environmental Ltd., Levelton Associates Consulting Engineers, Morrow Environmental Consultants Inc., Next Environmental, Norecol, Dames & Moore Inc., O'Connor Associates Environmental Inc., SEACOR Environmental Engineering Inc., Soilcon Laboratories Ltd., SRK-Robinson Inc., Terra Environmental Consultants Ltd.

AMOCO Canada Petroleum, Actton Petroleum, ARCO Products, Bearspaw Petroleum, Chevron Canada Ltd., Husky Oil, Imperial Oil, Mohawk Oil Co. Ltd., PetroCanada, Shell Canada Products Ltd.

A&A Anderson, AVCORP Industries, BASF Canada, BC Hydro, BC Ferries, Bell Helicopter, CN Rail, COMINCO Ltd., Cutler Hammer Canada, Doman Forest Products, Domtar Inc, EBCO Industries, HAZCO Environmental Services Ltd., ICI Paint Canada, Johnson Controls, K-Lor Contractors Ltd., Lafarge Canada, Laidlaw Environmental Services Inc., National Defense, Pacific Blasting, Philip Service Corporation, Reichhold Chemicals, 3E Company.