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' 01 November 2005 <br /> . AGE-NC Project No 02-0950 <br />' Page 4 of 9 <br />' data acquired from the initial CPT sounding indicating favorable conditions for sampling <br /> Ground water samples were collected using a HydroPunch sampling assembly pushed to specified <br />' zones, then withdrawn approximately 3 feet to expose an inlet screen, the interior of the sampling <br /> tool filled with water and a 1-inch outer diameter stainless steel bailer was lowered and utilized to <br /> extract a ground water sample Each ground water sample was transferred into three laboratory- <br /> supplied 40-m1 VOA vials containing 0 5 ml 18% hydrochloric acid solution as a sample <br /> preservative, and into one 1-liter amber bottle without preservative <br />' Ground water samples were collected from the CPT-1 boring location at the following intervals <br /> • Between 51 feet and 54 feet bsg, <br />' 0 Between 69 feet and 72 feet bsg, and <br /> • Between 97 feet and 100 feet bsg <br /> I <br /> Following collection, the grab ground water samples were placed in a chilled container and <br />' . transported under chain of custody procedures to CTEL for analysis for the constituents listed in <br /> Section 2 1 2 <br />' All rmseate generated during drilling activities was containenzed in properly labeled,DOT-approved <br /> 55-gallon drums The twinned soil boring was backfilled over its entire depth with a portland cement <br /> grout mix <br /> I <br /> 23 MONITORING WELL INSTALLATION, DEVELOPMENT, AND SURVEY <br /> On 21 July 2005,two additional ground water monitoring wells(MW-4 and MW-5)were installed <br /> at the site, the monitoring wells were developed on 29 July 2005 and surveyed on 21 September <br />' 2005 <br />' 2 3 1 Drilling and Sampling <br /> On 21 July 2005,a LAR drill rig was utilized to advance pilot soil borings MW4 and MW5 to a total <br /> depth of 35 feet below surface grade (bsg)using 8-inch diameter hollow-stem augers The drill rig <br /> and two-man crew were supplied by Cascade Driling, Inc of Rancho Cordova, California Auger <br /> I returns generated by the drilling were containerized in properly labeled, DOT-approved 55-gallon <br /> drums and stored on-site pending proper disposal <br /> Advanced GeoEnvironmcntal,Inc <br /> I � <br />