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Date: 7/11/97 <br /> Sampler: David Wang <br /> Code Time Dais CH4 CO2 02 Bal Pressure <br /> CHWELMIS 09:53 07/11/97 0.7 1 19 79.3 0.4 <br /> CHWELM11 09:50 07/11/97 13.7 40.5 0 25.8 0 <br /> CHWELM1D 09:47 07/11/97 ' 1.7 38.3 0 0 0.1 <br /> CHWELM2S 09:33 07/11/97 jP8.5 28.9 0 2.6 0 <br /> CHWELM21 09:36 07/11/97 65.7 34.3 0 0 0 <br /> CHWELM2D 09:39 07/11/97 57.3 42.3 0.4 0 0 <br /> CHWELM3S 10:54 07/11/97 16 18.9 7.5 57.6 0 <br /> CH WE LM31 10:52 07/11/97 50.7 44 0 5.3 0 <br /> CHWELM3D 10:50 07/11/97 42 39.4 0.7 17.9 0 <br /> CH WE LM4S 10:43 07/11/97 0.6 0.1 19 80.3 0 <br /> CHWELM41 10:41 07/11/97 0.6 0.1 18.7 80.6 0 <br /> CH WE LM4D 10:39 07/11/97 0.7 0.1 19.4 79.8 0 <br /> CH WE LMSS 10:32 07/11/97 1.2 5.6 4.3 88.9 0 <br /> CHWELM51 10:30 07/11/97 93.6 0.2 19.9 76.3 0 <br /> CH WE LMSD 10:27 07/11/97 1 10.8 0 76.2 0 <br /> CH WE LM6S 10:15 07/11/97 0.6 8.2 3.8 87.4 0.1 <br /> CHWELM61 10:12 07/11/97 30.8 30.7 0 38.5 0 <br /> CHWELM6D 10:07 07/11/97 49 44.5 1.6 4.9 0 <br /> CHWELMIS 10:01 07/11/97 0.5 1.6 18.5 79.4 0.2 <br /> CH WE LM7D 09:59 07/11/97 0.5 0.2 19.9 79.4 0.2 <br /> MONITORING RESULTS <br /> Landfill gas monitoring at the Corral Hollow Sanitary Landfill indicates that gas migration is <br /> occurring at several locations. The County has addressed this issue by installing final cover over <br /> the entire landfill. Final cover consists of a two foot foundation layer, a one foot clay barrier <br /> layer, and a one foot vegetative cover layer. Final cover will greatly reduce the amount of <br /> moisture entering the refuse, which in turn will reduce methane production. The County will <br /> continue gas testing on a quarterly basis to monitor the effects of final cover installation on gas <br /> migration. Effects of gas migration are expected to be minimal due to the desolate location of the <br /> Corral Hollow Sanitary Landfill. The only residence in the area is approximately one mile from <br /> the site. <br /> 4 <br />