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TABLE 2 - Continued <br />Second Quarter 2025 <br />Landfill Gas Perimeter Migration Monitoring Results <br />Foothill Sanitary Landfill <br />Monitoring Date: 5/6/2025 <br />Certified By: Meng Lo <br />Monitoring Well <br />Probe(% <br />Methane <br />-Vol) <br />CO2 <br />(%-Vol) <br />Oxygen <br />(%-Vol) <br />Balance <br />(%-V 1) <br />Pressure <br />Inch WC <br />Note <br />SG -113 S <br />0.1 <br />0.7 <br />19.4 <br />79.8 <br />-0.39 <br />SG -1131 <br />0.1 <br />0.3 <br />20.5 <br />79.1 <br />-0.30 <br />SG -113 D <br />0.1 <br />0.5 <br />20.3 <br />79.1 <br />0.28 <br />SG -114 S <br />0.1 <br />0.4 <br />19.3 <br />80.2 <br />-0.40 <br />SG -1141 <br />0.1 <br />0.3 <br />19.8 <br />79.8 <br />0.09 <br />SG -114 D <br />0.1 <br />0.3 <br />19.8 <br />79.8 <br />-0.24 <br />SG -115 S <br />0.1 <br />0.6 <br />18.6 <br />80.7 <br />-0.38 <br />SG -1151 <br />0.1 <br />0.5 <br />19.6 <br />79.8 <br />0.18 <br />SG -115 D <br />0.1 <br />0.3 <br />20.3 <br />79.3 <br />0.22 <br />SG -116 S <br />0.1 <br />0.3 <br />19.7 <br />79.9 <br />0.06 <br />SG -1161 <br />0.1 <br />0.4 <br />19.9 <br />79.6 <br />0.37 <br />SG -116 D <br />0.1 <br />0.4 <br />19.9 <br />79.6 <br />0.35 <br />SG -117 S <br />0.1 <br />0.1 <br />20.8 <br />79.0 <br />-1.50 <br />SG -1171 <br />0.1 <br />0.3 <br />20.3 <br />79.3 <br />-0.15 <br />SG -117 D <br />0.1 <br />0.4 <br />20.0 <br />79.5 <br />-0.05 <br />SG -118 S <br />0.1 <br />0.5 <br />19.6 <br />79.8 <br />-1.20 <br />SG -1181 <br />0.1 <br />0.5 <br />19.6 <br />79.8 <br />-3.30 <br />SG -118 D <br />0.1 <br />0.2 <br />20.5 <br />79.2 <br />0.25 <br />SG -119 S <br />0.1 <br />0.3 <br />19.8 <br />79.8 <br />0.11 <br />SG -1191 <br />0.1 <br />0.3 <br />20.0 <br />79.6 <br />0.18 <br />SG -119 D <br />0.1 <br />0.3 <br />19.9 <br />79.7 <br />0.07 <br />SG -120 S <br />0.0 <br />0.4 <br />20.0 <br />79.6 <br />0.14 <br />SG -1201 <br />0.0 <br />0.4 <br />20.4 <br />79.2 <br />0.24 <br />SG -120 D <br />0.0 <br />0.3 <br />20.3 <br />79.4 <br />0.28 <br />SG -121 S <br />0.0 <br />0.0 <br />21.3 <br />78.7 <br />0.30 <br />SG -1211 <br />0.0 <br />0.0 <br />21.2 <br />78.8 <br />-0.14 <br />SG -121 D <br />0.0 <br />0.2 <br />20.2 <br />79.6 <br />0.12 <br />SG -122 S <br />0.0 <br />0.2 <br />19.3 <br />80.5 <br />0.14 <br />SG -1221 <br />0.0 <br />0.2 <br />20.1 <br />79.7 <br />0.17 <br />SG -122 D <br />0.0 <br />0.3 <br />20.4 <br />79.3 <br />0.11 <br />SG -123 S <br />0.0 <br />0.3 <br />20.3 <br />79.4 <br />-0.39 <br />SG -1231 <br />0.0 <br />0.3 <br />20.4 <br />79.3 <br />0.16 <br />SG -123 D <br />0.0 <br />0.3 <br />20.5 <br />79.2 <br />-0.08 <br />SG -124 S <br />0.0 <br />0.2 <br />20.8 <br />79.0 <br />0.07 <br />SG -1241 <br />0.0 <br />0.2 <br />20.6 <br />79.2 <br />0.32 <br />SG -124 D <br />0.0 <br />0.2 <br />20.4 <br />79.4 <br />-0.15 <br />Revised 6-25-12 <br />N:\1Foothill\LFG Migration Monitoring\2025\2nd Qtr\ <br />FH -2nd Qtr LFG Perim Mig Monit 2025 Wells Sheet 2 of 3 <br />San Joaquin County <br />Public Works\Solid Waste <br />