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Certified By: Ken Espinoza <br />Monitoring Well Methane CO2 Oxygen Balance Pressure <br />Probe (%-Vol)(%-Vol)(%-Vol)(%-Vol)(Inch WC) <br />SG-01 0.3 0.4 18.1 81.2 -1.34 <br />SG-02AD 0.0 0.1 19.0 80.9 -0.78 <br />SG-02AI 0.0 0.4 13.2 86.4 -0.96 <br />SG-02AS 0.0 0.2 16.6 83.2 -0.88 <br />SG-03AD 0.0 0.2 9.8 90.0 -0.97 <br />SG-03AI 0.0 0.0 19.5 80.5 -0.54 <br />SG-03AS 0.0 5.2 15.1 79.7 -0.76 <br />SG-04 0.0 1.5 17.8 80.7 -1.83 <br />SG-05 0.0 0.5 19.3 80.2 -0.36 <br />SG-06AD 0.1 0.2 19.7 80.0 -0.79 <br />SG-06AI 0.1 0.6 19.9 79.4 -0.83 <br />SG-06AS 0.1 0.9 19.5 79.5 -0.43 <br />SG-07 0.0 1.4 17.6 81.0 -0.53 <br />SG-09 0.2 0.3 20.5 79.0 -0.03 <br />SG-10AD 0.0 0.4 19.4 80.2 -0.11 <br />SG-11AD 0.0 0.2 15.4 84.4 -1.03 <br />SG-11AI 0.0 1.6 13.6 84.8 -0.89 <br />SG-11AS 0.0 0.1 19.2 80.7 -1.01 <br />Notes: <br />Temperature: 70°F Data Entry By:Meng Lo / 5.13.25 <br />Barrometric: Pressure 29.87" Hg <br />Checked By: <br />Instrument Type:IR Absorbtion <br />Calibration Date: <br />Calibration Check:50% CH4 <br />Abbreviations: <br />SG-"n" = Soil Gas Monitoring Well <br />S= Shallow Probe, I= Intermediate Probe, D = Deep Probe <br />%-Vol = Percent by Volume <br />Note <br />Landfill Gas Monthly Perimeter Migration Monitoring Results <br />Foothill Sanitary Landfill <br />Monitoring Date: 5/6/25 <br />Conditions: Sunny <br />Wind Speed (MPH): 4 mph E <br />Direction: E <br />INSTRUMENT: Gem 5000 <br />May 5, 2025 <br /> Created: 5/14/2025 <br /> N:\1Foothill\LFG Migration Monitoring\2025\2nd Qtr\ <br /> FH_2nd Qtr LFG Perim Mig Monit 2025 Interior Wells Sheet 1 of 1 San Joaquin County <br />Public Works\Solid Waste