April/May 1999Vol. 12 No. 2, Issued May, 1999Environmental comment by Tom Davey Sterling addresses WEAO Conference Solving garbage problems from tour liners Environmental monitoring in Vancouver Cover story - Ontario's largest jacked pipe tunnel Saving energy in pump lift stations Controlling underground fumes Focus on the food processing industry Utilizing ballasted floc clarifiers Pulsed bed filters' role at the movies Invasive species in the spotlight Helicobactor pylori and public health Low energy costs for leachate treatment ES&E's conference a great success The true cost of level measurement AWWA's Chicago conference Self-cleaning membrane water treatment Odour and indoor air quality Tank Focus Polyethylene tanks in corrosion control Self supporting berm liner Complying with tank regulations |