American Society of Civil Engineers (ASCE)

ASTM International

Environmental Institute for Petroleum (Australia)

Canadian Water Well Assn (CWWA)

Hazardous Materials Control Research Institute(HMCRI)

Massachusetts Licensed Site Professionals Assn (MA LSP)

National Ground Water Association (NGWA)

Ohio Manufacturers Association (OMA)

Ohio Petroleum Marketers Association (OPMA)

Oklahoma Ground-Water Association (OGWA)

Society for Environmental Toxicology & Chemistry (SETAC)