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Intedm gas sampling probes were wed to monitor wbmfice Vases at the hadfill peri,,et, <br />FAch probe consists ot a 5400't long, %4nch diarneter SUW= steel pip, with V <br />44�cb bole$ <br />staggered eveq 2 indes at the bottom 19 inches to allow for Sases to migratt into the prob <br />es. A <br />pointed tip vms wicided to the end of the probe for better penctratiam <br />A ball valve and btau f itting W'= installed at the top Or'each Probe to ccnt`dn gas Pre=ures and <br />fiCWUt0 instrument hook-up to tk probe- The valves wat left R F wuv, " M11, I ; & Xk. Q z #4 v &T <br />or Instrurnent reading, Each probc is tagged "Nitha brass plate aW identified as "GP- j " throuoh <br />A40A-90 Landtec used to mionitar rnethanf,., carbon, dioxIde. (Cox), <br />and oxygen (02) kviels at each probe location. The ana[Y= Was calibrated for tuca=e, CO <br />and <br />02 Prior to use in the field- Calibration.l*gs are.included in thismport., <br />Gasmonitoring <br />Arabitim air m=surments of metharw <br />.. oxyger� carbon dio�ddc, and barornettic. <br />taken at each gas probe lo,=tiom Those readings - CSSXI=M W <br />v -"-m recorded and- tbc insftumcnt, <br />r* f 4 i* the prob,-- -The valve was opened wWprobeS=pr=um <br />MM <br />easurements wezc r. w## <br />The pwbc was theupWjOd for tvvo probe vohune� , R=du- <br />W vvete then tollected <br />*=4niately 3(�_ to 60 -Second ktc�.- untiL.a SIZU0 reading was obtziue&.. <br />n2tasum'm.xi ts of wed=e. oxygen, carbon diaxkIt, and ambient bammetric prcssure vtm <br />4. <br />r=rdedMonitoring was also conducted at various locations in th= I building sites for thc <br />presence of rnefl=e gas_ Monitoring was conducted at the office trailer at the enu=ce to <br />landfill. tMiler boxes al the sw4cc shop, and trailer boxes at the traaerr building. Th <br />locaeons we= monitored for any gas pockets at the famdation and near any opening from the <br />floor such as piping holes, 4ectrical conduits, or Amr cracks. <br />Nor to sampling lysimiu:rs}the Presmm-vacuumeq*ment is checked'and cleanc& <br />23-493949-FOMIOR325 A-12 <br />