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T27CCR 20939 (b) (1) — Sub -surface Landfill Gas Control Systems — The facility has experienced 5 subsurface landfill fires. Four of the fires occurred in this year. The <br />fires are all located along the toe of the slope. The latest fire occurred a long the western toe of the old Forward Inc portion of the landfill. The fire occurred along the <br />horizontal collector. The facility operator indicated that they would place soil over the area and monitor it. The operator provided a copy of the facility response plan the <br />pertained to sub -surface landfill fires. It is currently under review. It appears that the landfill gas system is over pulling and creating fires that erupt below the surface of <br />the landfill. The facility shall review and evaluate the gas control system to determine what can be done to prevent further instances of sub -surface landfill fires. The <br />site operator is currently working with the CIWMB to resolve the issue. <br />Notes: <br />1. The tarps used as daily cover were not balasted to prevent the tarps from being removed during high winds. <br />Properly weigh down the tarps each night. <br />2. The daily cover consisted of tarps, TASW, soil. <br />3. The perimeter gas probes were monitored using a Landtec Gem 500 field screening device, during the inspection, The <br />following was noted: <br />SG9 (S) (1) (D) 0.0% CH4 <br />SG11 (S) 0.2% CH4 (1) 1.7% CH4 (D) 0.0% <br />SG12 (S) 2.1 % CH4 (1) 0.0% CH4 (D) 0.5% <br />4. The following Areas of Concern listed on the previous inspection report were resolved: <br />a. T27CCR 20820 - Drainage and Erosion Control <br />b. T27CCR 20921 (a) (2) - Explosive Gas Control <br />