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Landfill Gas Monthly Perimeter Migration Monitoring Results <br />Foothill Sanitary Landfill <br />Monitoring Date: 5/6/25 Certified Bv: Ken Esoinoza <br />Monitoring Well <br />Probe(% <br />Methane <br />-Vol) <br />CO2 <br />(%-Vol) <br />Oxygen <br />%-Vol <br />Balance <br />%-Vol <br />Pressure <br />Inch WC <br />Note <br />SG -01 <br />0.3 <br />0.4 <br />18.1 <br />81.2 <br />-1.34 <br />IR Absorbtion <br />SG-02AD <br />0.0 <br />0.1 <br />19.0 <br />80.9 <br />-0.78 <br />SG-02AI <br />0.0 <br />0.4 <br />13.2 <br />86.4 <br />-0.96 <br />SG-02AS <br />0.0 <br />0.2 <br />16.6 <br />83.2 <br />-0.88 <br />SG-03AD <br />0.0 <br />0.2 <br />9.8 <br />90.0 <br />-0.97 <br />SG-03AI <br />0.0 <br />0.0 <br />19.5 <br />80.5 <br />-0.54 <br />SG-03AS <br />0.0 <br />5.2 <br />15.1 <br />79.7 <br />-0.76 <br />SG -04 <br />0.0 <br />1.5 <br />17.8 <br />80.7 <br />-1.83 <br />SG -05 <br />0.0 <br />0.5 <br />19.3 <br />80.2 <br />-0.36 <br />SG-06AD <br />0.1 <br />0.2 <br />19.7 <br />80.0 <br />-0.79 <br />SG -06A1 <br />0.1 <br />0.6 <br />19.9 <br />79.4 <br />-0.83 <br />SG-06AS <br />0.1 <br />0.9 <br />19.5 <br />79.5 <br />-0.43 <br />SG -07 <br />0.0 <br />1.4 <br />17.6 <br />81.0 <br />-0.53 <br />SG -09 <br />0.2 <br />0.3 <br />20.5 <br />79.0 <br />-0.03 <br />SG-10AD <br />0.0 <br />0.4 <br />19.4 <br />80.2 <br />-0.11 <br />SG-11AD <br />0.0 <br />0.2 <br />15.4 <br />84.4 <br />-1.03 <br />SG -11 AI <br />0.0 <br />1.6 <br />13.6 <br />84.8 <br />-0.89 <br />SG-11AS <br />0.0 <br />0.1 <br />19.2 <br />80.7 <br />-1.01 <br />Notes <br />Temperature: 70°F <br />Barrometric: Pressur( <br />29.87" Hg <br />Conditions: Sunny <br />Wind Speed (MPH): <br />4 mph E <br />Direction: E <br />INSTRUMENT: Gem 5000 <br />Instrument Type: <br />IR Absorbtion <br />Calibration Date: <br />May 5, 2025 <br />Calibration Check: <br />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 />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 <br />Data Entry By: Meng Lo / 5.13.25 <br />Checked By: <br />San Joaquin County <br />Public Works\Solid Waste <br />