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

Phase 1 Monitoring Results.
Temperature Monitoring

Landfill measurements have been measured twenty eight (28) times since the competition of Phase 1. SHA staff took all of the measurements up to August 5,1998, while Regional District staff took subsequent measurements.

The temperature measurements within the gas monitoring wells along the crest and toe of the ravine (GMW98-1A, GMW98-4A GMW98-5A, GMW98-6A and GMW98-8), were within the normal temperature range typically encountered at landfill sites (up to 55 degrees C.). Although some temperature fluctuations were noted, the largest fluctuations occurred at Thermistors located near surface were conditions such as snow cover or compost material stockpiling, and not a fire, would have caused the changes.

Similar results were encountered at Pt 1/4 of GMW98-2A, Pt 3 of GMW98-3A and all points at GMW98-7A, with temperatures remaining below 55 degrees C. All of these Thermistors are located in wells within the body of the North Ravine. The only difference between these results and the results obtained at the crest/toe Thermistors is that temperature fluctuations encountered at Pt 3 of GMW98-3A in particular were likely due to residential heat generated by the fire.

Figure3 summarizes the temperature results for the remaining Thermistor locations, (Pts 2/3/4 of GMW98-2A, GMW98-3A and P 2 of  GMW98-7A) all of which encountered temperatures in excess of 55 degrees C. during one or more sampling rounds. The temperatures at all these locations have been following a downward trend since the completion of the clay cap.

Figure3 Click on picture for larger image (opens in a new window).

It is important to note that in May of 1998 (during the installation of the clay barrier), water was poured into GMW98-2 to clear soil bridges that were created when the well was accidentally buried. This accounts for the erratic preliminary results for GMW98-2.

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