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TABLE 2 - Continued <br />Second Quarter 2025 <br />Landfill Gas Perimeter Migration Monitoring Results <br />Foothill Sanitary Landfill <br />Monitorina Date: 5/6/2025 <br />Certified Bv: Mena Lo <br />Monitoring Well Methane <br />Probe(% -Vol) <br />CO2 <br />(%-Vol) <br />Oxygen <br />(%-Vol) <br />Balance Pressure <br />(%-Vol) Inch WC <br />Note <br />SG -125 S 0.0 <br />0.3 <br />19.7 <br />80.0 -0.12 <br />SG -1251 0.0 <br />0.3 <br />19.6 <br />80.1 -0.11 <br />SG -125 D 0.0 <br />0.3 <br />19.4 <br />80.3 -0.59 <br />Notes: <br />Temperature: 70°F <br />Barrometric: Pressur( 29.87" Hg <br />Conditions: Sunny <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 />Data Entry By: Meng Lo / 5.13.25 <br />Checked By: <br />Revised 6-25-12 <br />N:\1 Foothill\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 />