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Monitoring Date: 5/6/2025 Certified By: Meng Lo <br />Monitoring Well Methane CO2 Oxygen Balance Pressure <br />Probe (%-Vol)(%-Vol)(%-Vol)(%-Vol)(Inch WC) <br />SG-125 S 0.0 0.3 19.7 80.0 -0.12 <br />SG-125 I 0.0 0.3 19.6 80.1 -0.11 <br />SG-125 D 0.0 0.3 19.4 80.3 -0.59 <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 />Conditions: Sunny <br />INSTRUMENT: Gem 5000 <br />May 5, 2025 <br />Wind Speed (MPH): 4 mph <br />Direction: E <br />Second Quarter 2025 <br />TABLE 2 - Continued <br />Landfill Gas Perimeter Migration Monitoring Results <br />Foothill Sanitary Landfill <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 3 of 3 San Joaquin County <br />Public Works\Solid Waste