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Landfill Gas Monthly Perimeter Migration Monitoring Results <br /> Foothill Sanitary Landfill <br /> Monitoring Date: 11/19/25 Field Tech: K. Espinoza <br /> Monitoring Well Methane CO2 Oxygen Balance Pressure Note <br /> Probe (%-Vol) (%-Vol) (%-Vol %-Vol Inch WC <br /> SG-01 1.2 0.0 21.1 77.7 -3.55 <br /> SG-02AD 1.0 0.2 17.0 81.9 -2.39 <br /> SG-02AI 0.9 0.4 13.3 85.4 -1.99 <br /> SG-02AS 0.9 0.7 18.0 80.5 -1.59 <br /> SG-03AD 0.9 0.2 8.4 90.5 -1.92 <br /> SG-03AI 0.9 4.2 10.5 84.4 -1.51 <br /> SG-03AS 0.9 2.3 18.2 78.5 -0.34 <br /> SG-04 0.9 1.3 19.9 77.9 -0.47 <br /> SG-05 0.9 0.6 20.1 78.4 -0.07 <br /> SG-06AD 1.1 0.2 20.1 78.6 -1.44 <br /> SG-06AI 1.0 0.1 21.1 77.8 -0.35 <br /> SG-06AS 1.0 1.1 20.0 77.9 -0.06 <br /> SG-07 1.0 0.9 19.4 78.6 -0.38 <br /> SG-09 1.1 0.1 21.5 77.3 -0.14 <br /> SG-1 DAD 1.1 0.2 21.1 77.6 -0.06 <br /> SG-11AD 1.0 0.2 16.9 81.9 -1.84 <br /> SG-11 AI 1.0 0.2 20.4 78.1 -1.25 <br /> SG-11 AS 1.0 0.0 21.3 77.6 -0.64 <br /> Notes: <br /> Temperature: 57 °F Data Entry By: AR/11.19.25 <br /> Barrometric: Pressur( 30.08" Hg <br /> Conditions: Cloudy Checked By: 1A/ 12.15.25 <br /> Wind Speed (MPH): 6 mph <br /> Direction: S <br /> INSTRUMENT: Gem 5000 <br /> Instrument Type: I Absorbtion <br /> Calibration Date: 11/19/25 <br /> Calibration Check: 50% CH4 <br /> Abbreviations: <br /> SG-"n" = Soil Gas Monitoring Well <br /> S= Shallow Probe, 1= Intermediate Probe, D = Deep Probe <br /> %-Vol = Percent by Volume <br /> Created: 12/31/2025 <br /> N:\1Foothill\LFG Migration Monitoring\2025\4th Qtr\ San Joaquin County <br /> FH_4th Qtr LFG Perim Mig Monit 2025 Interior Wells Sheet 1 of 1 Public Works\Solid Waste <br />