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device. An electric sounder will men be lowered through the drill rods to cheek for the presence of <br /> groundwater sample will be collected lwlowedng owner 's- <br /> nless- <br /> groundwater. <br /> ugh the knitonority ate r is and iarse nto the sampling device, sample advanced feet <br /> not detected In the sampring desire after oempt to capers another ne hour, <br /> beamesaad mthe orglrreillbe attire pie collection <br /> e. <br /> deeper ay tlfier� m those proposed in Table maed on depth to gounmpwa rot each spa�°O ration <br /> mation <br /> Groy <br /> sa ill be transferred t laboratory- plied cargco analytical <br /> labeled, sealed in plastc� bags. an placed in anrscolea chest penamg shipment to the a <br /> ain curtody pone¢cages. Groundwater olmPles will be subfieted to <br /> Californiallec <br /> certified analytlaboratory icalllaboratory for maker, ofV0 aging UEPhod 82601B. Ate match surface <br /> the reM1ole will he filled with Out greatcemem tog n surface <br /> conditions. <br /> 3.3.3 Soil Vapor <br /> Soil vapor Sampling <br /> probes are proposed to be installed using Direct Push dolling equipment (truck mounted <br /> Designate 2200 ar sirmarl at 15locations Wonted with prolsosod groundwater sampling locations <br /> (I knife 3tEdmaen Probes will be consbucted to draw soil vapor was PAS from 5, 10 and 15 feet falls; <br /> two probes will he constructed with five sample depths to 25 feet bgs (Table 2).The soil vapor sampling <br /> racetlures are based can guidance provkled in the lull ADS Cal/EPA dowread antiftled Advisory— <br /> AaNe sort Gars investigations (2015 Ca1EPA AdAerv) and theOct0ber 2011 DISC Guidanre. <br /> Soil vapor probes will he installed using small diameterTefion' tubing,&fail with afilter aethpe bottom <br /> to prevent pardworm InfibradurFattarched to a support rear and placed in bad21antl n oing depths¢ <br /> peufiel in Table 2. After reading bmrget cepthh of 15.5 25.5ford his (ra <br /> tubla6 specified depths, the probes will <br /> s follows: <br /> A lift of aPpro.imatelY 12Inches of finer pad sane will be place in the loners of the boring <br /> (from 14.5to 155feet bgs or24.5to 25.5 feet bgs, aepe rdngon the aborelbolewin be <br /> After emplacement of the fitter pack sand around the deep beme <br /> est pre M1 thin layer of <br /> backfillea to the bottom of th at e ne sampling interval (0.5 or N 5 feet hard with <br /> dry grammar ammonite Hewed by hydrated hentarthe usinga tremie pipe or similar method. A <br /> second filter pad sand interval will he emplaced from 9.5 to 10.5 or 19.5 to 20.5 feet bgs. <br /> After installation of the second deepest sand pack, the borehole wind a backfilled with a secant <br /> robe <br /> fireIT mry and chCtionwedntinu hInchesannex folr ahanwrer sampling intervals until the rat <br /> will nthe5 same <br /> feet bgs h placed around the shallowest depth <br /> • The W5), and fire <br /> pa 'Ste t the surface with hentonde. owestProbe de b <br /> retie bgA, and me boring is backlillee o <br /> of Else soli vapor complete, ng for each pro ill be capped <br /> cetheco construction <br /> mounted well boor �everb minimum Over <br /> enc coil a <br /> por <br /> Probeh or r gopS va e vapor probes will fare allowed to candidate aminimn than hourslpriorto n <br /> oavrsvn a24M1 c and surn hog. Per perad, sampling <br /> P g will not be DISC go dargai rcompleted event <br /> for a minimum of 5 days afterward. <br /> 8 MICH <br />