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TABLE 3 <br />Fourth Quarter 2024 <br /> Structure Monitoring for Landfill Gas Results <br />Foothill Sanitary Landfill <br />Certified By: K. Espinoza <br />Carbon Balance <br />Dioxide Gas <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 20.2 79.5 <br />Monitoring Date: 1/3/24 <br /> Methane gas to be less than1.25 percent by volume. <br />* Compliance Level: <br />NoteBuilding and Monitoring Location Methane Oxygen <br /> N:\1Foothill\LFG Migration Monitoring\2025\1st Qtr\ <br /> FH_1st Qtr LFG Perim Mig Monit 2025 Structures