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WIT4114H <br />Fourth Quarter 2017 <br />Structure Monitoring for Landfill Gas Results <br />North County Sanitary Landfill <br />Building and Monitoring Location <br />Methane <br />(% by vol) <br />Carbon <br />Dioxide <br />(% by vol) <br />Oxygen <br />(% by vol) <br />Balance <br />Gas <br />(% by vol) <br />Office/Maint Building (Electrical Box) <br />0.0 <br />0.1 <br />20.3 <br />79.6 <br />Office/Main Building Interior (Downstairs Office) <br />0.0 <br />0.1 <br />20.3 <br />79.6 <br />Pum house (Electrical Conduit Interior) <br />0.0 <br />0.1 <br />20.5 <br />79.4 <br />Pumphouse (Electrical Conduit Exterior) <br />Pumphouse (interior) <br />Recycling Center (interior) <br />0.0 <br />0.0 <br />0.0 <br />0.1 <br />0.1 <br />0.1 <br />20.4 <br />20.4 <br />20.2 <br />79.5 <br />79.5 <br />79.7 <br />Recycling Center (Loading Dock) <br />0.0 <br />0.1 <br />20.2. <br />79.7 <br />Scalehouse (Electrical Conduit) <br />0.0 <br />0.1 <br />20.1 <br />79.8 <br />Scalehouse (Interior) <br />0.0 <br />0.2 <br />20.1 <br />79.7 <br />Monitoring Date: October 10, 2017 <br />NA1 North County\LFG Migration Monitoring\2017\4th Qtr\NC-4th Qtr LFG Perim Mig Monit 2017 Structures <br />Monitoring Technician: M. Palis <br />El <br />E <br />