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TABLE 3 <br /> Third Quarter 2025 <br /> Structure Monitoring for Landfill Gas Results <br /> Foothill Sanitary Landfill <br /> Monitoring Date: 7/17/25 Certified By: Ken Espinoza <br /> Carbon Balance <br /> Building and Monitoring Location Methane Dioxide Oxygen Gas Note <br /> (% by vol) (% by vol) (% by vol) (% by vol) <br /> Maintenance Building (Electrical Conduit) 0.3 0.1 20.1 79.2 <br /> Maintenance Building (Interior) 0.3 0.1 20.5 79.3 <br /> Managers Residence (Electrical) 0.3 0.1 20.1 79.3 <br /> Managers Residence (Interior) 0.2 0.1 19.4 79.9 <br /> Managers Residence Crawl Space 0.2 0.1 19.9 80.1 <br /> Scalehouse (Electrical Conduit) 0.3 0.1 20.4 79.3 <br /> Scalehouse (Interior) 0.3 0.1 1 20.5 79.1 <br /> * Compliance Level: <br /> Methane gas to be less than1 .25 percent by volume. <br /> NA1Foothill\LFG Migration Monitoring\2025\3rd Qtr\ <br /> FH_3rd Qtr LFG Perim Mig Monit 2025 Structures <br />