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TABLE 2 - Continued <br /> Second Quarter 2025 <br /> Landfill Gas Perimeter Migration Monitoring Results <br /> Foothill Sanitary Landfill <br /> Monitoring Date: 5/6/2025 Certified By: Meng Lo <br /> Monitoring Well Methane CO2 Oxygen Balance Pressure Note <br /> Probe (%-Vol) (%-Vol %-Vol) (%-Vol) (Inch WC <br /> SG-125 S 0.0 0.3 19.7 80.0 -0.12 <br /> SG-1251 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: Pressur( 29.87" Hg <br /> Conditions: Sunny Checked By: <br /> Wind Speed (MPH): 4 mph <br /> Direction: E <br /> INSTRUMENT: Gem 5000 <br /> Instrument Type: IR Absorbtion <br /> Calibration Date: May 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 /> Revised 6-25-12 <br /> NA1Foothill\LFG Migration Monitoring\2025\2nd Qtr\ San Joaquin County <br /> FH_2nd Qtr LFG Perim Mig Monit 2025 Wells Sheet 3 of 3 Public Works\Solid Waste <br />