Risk-Based Engineering Design for a Landfill Leachate Collection and Liner System |
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| Authors: | Gordon B. Murray Edward A. McBean Jonathan F. Sykes |
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| Affiliation: | Gordon Murray;received a B.A.Sc. and an M.A.Sc. from the University of Waterloo in civil engineering. Now with Golder Associates Ltd. in Mississauga, Ontario, the focus of his work is on ground water quality modeling (Golder Associates Ltd., Mississauga, Ontario, Canada, L5N 5R1). Edward A. McBean;received his undergraduate degree from the University of British Columbia and his graduate degrees from M.I. T., all in civil engineering. He is an associate with Conestoga-Rovers and Associates in Waterloo, Ontario (651 Colby Dr., Waterloo, Ontario, Canada, N2V 1C2), where the focus of his work is on contaminant migration modeling and risk assessment. Jon F. Sykes;received all of his degrees from the University of Waterloo in civil engineering. He is a professor of civil engineering at the University of Waterloo (Dept. of Civil Engineering, Waterloo, Ontario, Canada, N2L 3G1). |
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| Abstract: | A methodology is used to identify the tradeoffs between costs and exposure risk associated with landfill leachate collection and low permeable systems. The results are useful in demonstrating the point at which additional levels of sophistication in design of a leachate/liner system do not produce significant reductions of exposure risk. The case study application to the Durham Regional landfill demonstrates that clay liner hydraulic conductivity is the parameter with the largest influence on the risk of exceedance at the point of compliance. When the underlying clay is more permeable, there is a significant merit associated with use of a QA/QC program. |
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