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TABLE 3 <br /> Fourth Quarter 2024 <br /> Structure Monitoring for Landfill Gas Results <br /> Foothill Sanitary Landfill <br /> Monitoring Date: 1/3/24 Certified By: K. 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) 0.1 0.2 21 .3 78.5 <br /> Maintenance Building (Interior) 0.1 0.1 21 .1 78.6 <br /> Managers Residence (Electrical) 0.1 0.1 21 .4 79.1 <br /> Managers Residence (Interior) 0.2 0.1 21 .2 78.6 <br /> Managers Residence Crawl Space 0.1 0.0 23.6 78.9 <br /> Scalehouse (Electrical Conduit) 0.1 0.1 21 .1 79.4 <br /> Scalehouse (Interior) 0.1 0.2 1 20.2 79.5 <br /> * Compliance Level: <br /> Methane gas to be less than1 .25 percent by volume. <br /> NA1 Foothill\LFG Migration Monitoring\2025\1 st Qtr\ <br /> FH_1st Qtr LFG Perim Mig Monit 2025 Structures <br />