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Landfill Gas Monthly Perimeter Migration Monitoring Results <br /> Foothill Sanitary Landfill <br /> Monitoring Date: 8/5/25 Certified By: Daniel Gonzales <br /> Monitoring Well Methane CO2 Oxygen Balance Pressure Note <br /> Probe (%-Vol) (%-Vol) (%-Vol %-Vol Inch WC <br /> SG-01 0.2 0.1 20.7 79.0 -0.8 <br /> SG-02AD 0.1 0.2 16.7 83.0 -0.6 <br /> SG-02AI 0.1 0.4 13.3 86.2 -0.7 <br /> SG-02AS 0.1 1.7 14.8 83.4 -0.8 <br /> SG-03AD 0.1 0.1 17.9 81.9 -1.2 <br /> SG-03AI 0.1 4.8 10.8 84.3 -0.8 <br /> SG-03AS 0.1 4.4 16.1 79.4 -0.5 <br /> SG-04 0.0 2.3 17.3 80.4 -0.4 <br /> SG-05 0.0 0.1 19.6 80.3 -0.2 <br /> SG-06AD 0.0 0.2 19.4 80.4 -1.1 <br /> SG-06AI 0.0 0.9 19.4 79.7 -0.8 <br /> SG-06AS 0.0 1.0 19.0 80.0 -0.4 <br /> SG-07 0.0 1.1 18.7 80.2 -0.3 <br /> SG-09 0.0 0.3 20.0 79.7 -0.4 <br /> SG-10AD 0.0 0.2 17.0 82.8 -0.9 <br /> SG-11 AD 0.0 0.2 16.1 83.7 -0.8 <br /> SG-11 AI 0.0 0.1 20.8 79.1 -0.8 <br /> SG-11AS 0.0 0.1 20.8 79.1 -0.7 <br /> Notes: <br /> Temperature: 69 °F Data Entry By: Juan Acevedo <br /> Barrometric: Pressure 30.02" Hg <br /> Conditions: Sunny Checked By: Juan Acevedo <br /> Wind Speed (MPH): 6mph <br /> Direction: E <br /> INSTRUMENT: Gem 5000 <br /> Instrument Type: IR Absorbtion <br /> Calibration Date: August 5, 2025 <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: 11/3/2025 <br /> N:\1 Foothill\LFG Migration Monitoring\2025\3rd Qtr\ San Joaquin County <br /> FH_3rd Qtr LFG Perim Mig Monit 2025 Interior Wells Sheet 1 of 1 Public Works\Solid Waste <br />