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                        SUBSURFACE LANDFILL FIRE SUPPRESSION AND MONITORING
                       
A Case Study at the Campbell Mountain Landfill, Penticton, British Columbia

The Drilling Program.
(continued from previous page).


                    

A two standpipe piezometer nest was completed in each borehole, with the exception of GMW98-8 where only one standpipe was installed. The nested piezometers consisted of a 38 mm diameter standpipe installed as close to the borehole as feasible, and s shallower 25 mm diameter standpipe installed as close to the borehole bottom as feasible, and a shallower 25 mm diameter upper standpipe.

The standpipes that were installed consisted of galvanized steel blanks complete with 1.5 metre slotted screens at the downhole end. Each borehole was backfilled with pea gravel. A clay seal was installed to separate the two standpipes in each borehole.

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