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Cl <br />SUBSURFACE GAS CONDITION BELOW STRUCTURE FOUNDATIONS MONITORING <br />3rd Quarter 2012 <br />Harney Lane Landfill <br />Date: 7/20/2012 By: B Closs / S Kong <br />Ambient <br />Baro <br />02 <br />(% by vol) <br />Balance <br />(% by vol) <br />Structure Foundation 1 <br />(Northern -most structure) <br />Temp <br />Press <br />General <br />Wind <br />Wind <br />(deg F) <br />(in -Hg) <br />Weather <br />Speed (MPH) <br />Direction <br />78 <br />30.05 <br />Clear / Sunny <br />7 <br />NW <br />Location <br />Methane <br />(% by vol) <br />Carbon <br />Dioxide <br />(% by vol) <br />02 <br />(% by vol) <br />Balance <br />(% by vol) <br />Structure Foundation 1 <br />(Northern -most structure) <br />0.0 <br />1.3 <br />18.1 <br />80.6 <br />Structure Foundation 2 <br />0.1 <br />0.3 <br />18.7 <br />80.9 <br />Structure Foundation 3 <br />0.0 <br />0.2 <br />18.9 <br />80.9 <br />Structure Foundation 4 <br />0.0 <br />0.1 <br />19.1 <br />80.8 <br />Structure Foundation 5 <br />0.1 <br />0.3 <br />19.0 <br />80.6 <br />Structure Foundation 6 <br />0.1 <br />3.9 <br />14.4 <br />81.6 <br />Structure Foundation 7 <br />0.0 <br />1.3 <br />18.2 <br />80.5 <br />Structure Foundation 8 <br />0.0 <br />0.3 <br />18.9 <br />80.8 <br />Structure Foundation 9 <br />0.0 <br />0.4 <br />18.6 <br />81.0 <br />Structure Foundation 10 <br />0.0 <br />0.5 <br />19.0 <br />80.5 <br />Structure Foundation 11 <br />0.0 <br />0.2 <br />19.5 <br />80.3 <br />Structure Foundation 12 <br />0.0 <br />2.6 <br />16.7 <br />80.7 <br />Structure Foundation 13 <br />(Southern -most structure) <br />0.0 <br />1 1.9 <br />17.5 <br />80.6 <br />Note: these data represent the conditions in the aggregate base beneath the structural foundation slab of <br />these strurcures, measured through a tube inserted to the aggregate base through a vertical vent that extends <br />from below the slab through the building roof. These data do not represent the conditions in the occupied <br />area of the structure above the slab. <br />N:\1 Harney Lane\LFG Migration Monit\Repts 2012\3rd Qtr\ <br />HL 3rd Qtr 2012 Structure Monit Data.xls Printed 7/25/2012 <br />