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Monitoring Well Methane CO2 Oxygen Balance Pressure <br />Probe (%-Vol)(%-Vol)(%-Vol)(%-Vol)(Inch WC) <br />SG-125 S 0.0 0.2 20.6 79.2 -0.27 <br />SG-125 I 0.0 0.3 20.4 79.3 -0.29 <br />SG-125 D 0.0 0.4 20.4 79.2 -0.35 <br />Notes: <br />Temperature: 58°F <br />Barrometric: Pressure: 30.34" Hg <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 />Conditions: Sunny <br />INSTRUMENT: Gem 5000 <br />January 22, 2025 <br />Wind Speed (MPH): 1 mph <br />Direction: SE <br />Monitoring Date: 1/22/25 <br />First Quarter 2025 <br />TABLE 2 - Continued <br />Landfill Gas Perimeter Migration Monitoring Results <br />Foothill Sanitary Landfill <br />Ceritified By: K. Espinoza <br /> Revised 6-25-12 <br /> N:\1Foothill\LFG Migration Monitoring\2025\1st Qtr\ <br /> FH_1st Qtr LFG Perim Mig Monit 2025 Wells Sheet 3 of 3 San Joaquin County <br />Public Works\Solid Waste