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r <br /> v <br /> 01 May 2000 <br /> AGE-NC Project No 96-0232 <br /> Page 9 of 1 I <br /> exti action well installation procedures for the site were outlined in Intel zm Remediation Woi k Plan, <br /> dated 23 March 2000 prepared by AGE and approved by the RWQCB by letter dated 28 March <br /> 2000 -y a <br /> 61 I1\1STALLATION PROCEDURES <br /> One soil bot trig/ground water extraction well (EW-1) was advanced at-the site as part of interim <br />' remediation measures Soil bonng EW-1 was advanced vertically to a depth of 35 feet below sui face <br /> grade (bsg) utilizing a CME-85 high-torque, truck-mounted drill rig equipped with 101/4-inch <br /> diameter hollow-stem augeis Soil cuttings were stockpiled on and co,,ered by plastic sheeting to-tlie <br /> northeast portion of the site in an area lacking public access The soil boring location is depicted in <br /> 'Figure 2 , <br />' 6 1 1 Equipment Decontaininatioin u <br /> The hollow stenn augers were steam cleaned prior to each bore bole advancement Following drilling <br /> actiti sties, rinseate generated fionn decontaminating the equipment was placed in properly labeled <br /> D O T -approved model 17H 55-gallon drums and was stored at the site in an area lacking public <br /> access <br />' 62 Ground Water Extraction Well Completion u <br /> 1 , <br /> Soil boring EW-1 Nxas,sin gle-'completed as a ground water extraction well utilizing schedule 40, <br /> 6-inch diameter blank polyvinylchloridc (PVC) well casing and perforated, 6-inch diameter PVC <br /> well casing (0 020-inch slot) <br /> The ground water extraction well was installed by placing a PVC well casing assembly through the' <br /> hollow stein of the augers'to the total depth of the boring The augers were incrementally i aised as <br />' No 3 Lonestar Lapis Luster sand (filter pack) Nvas sloe ly poui ed down the annulus between the well <br /> casing and the inner.wall of the hollow stern auger The filter pack was placed adjacent to the <br /> screened casing frons the bottom of the boring to alpoiint appioxninately two feet above the top of the <br />' <br /> screen, following filtei pack placement, a surge block was inserted into tkie well casing and was <br /> altematcly raised and lowered '(surged) repeatedly,for approxiinately 20 minutes Two feet of <br /> bentonite chips (annular sea]) were placed above the filter pack and hyd3ated wt'th clean tap water <br />' The remaining annulat space \vas backfilled with portland cement An�as-built well-construction <br /> diagiainn is included as Figure 5 ; <br /> � r <br /> k <br /> ` Adranccd GcoEnNironntujtal,inr <br /> r <br />