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Date :1/24/2025 <br />Time:9:00 am TABLE 2 <br />First Quarter 2025 <br />Structure Monitoring for Landfill Gas Results <br />North County Sanitary Landfill <br />Certified By : Ken Espinoza <br />Carbon Balance <br />Methane Dioxide Oxygen Gas <br />(% by vol)(% by vol)(% by vol)(% by vol) <br />Office/Maint Building (Electrical Box)0.1 0.2 20.8 78.9 <br />Office/Main Building Interior (Downstairs Office)0.1 0.1 20.7 79.1 <br />Pumphouse (Electrical Conduit Interior)0.1 0.1 20.9 78.9 <br />Pumphouse (Electrical Conduit Exterior)0.1 0.2 21.1 78.6 <br />Pumphouse (Interior)0.1 0.1 21.0 78.8 <br />Recycling Center (Interior)0.1 0.1 21.3 78.5 <br />Recycling Center (Loading Dock)0.1 0.1 21.4 78.4 <br />Scalehouse (Electrical Conduit)0.1 0.1 21.4 78.4 <br />Scalehouse (Interior)0.1 0.2 21.6 78.1 <br />Field Notes <br />Weather: Sunny Temp: 60 °F Barometric Pressure: 29.95" Hg <br />Instrument: GEM-5000 Wind: 5 MPH SE <br />Monitoring procedure: <br />Monitoring probes were visualy inspected for any damages first. The Gem was used to purge probes for 1 min <br />Building and Monitoring Location <br />Instrument Calibration Date: <br />and then readings were recorded for another 1 min. <br />N:\1North County\LFG Migration Monitoring\Probes n Structures Reports\2025\1st Qtr\NC_1st Qtr LFG Perim Mig Monit 2025 Structures 01-24-25