Links

American Water Works Association
www.awwa.org

Water Environment Federation
www.wef.org

Center for the advancement of Trenchless Technologies (CATT)
www.civil.uwaterloo.ca/catt/memberinfo.html

North American Society of Trenchless Technology
www.nastt.org

ASTM International
www.astm.org

Echologics – Acoustic Correlation Specialist
www.echologics.com