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1� <br /> ' analytical laboratory. Where the PID showed only low readings, soil samples were collected just <br /> above the groundwater table. The ends of the acrylic tubes containing the soil to be tested were <br /> covered with Teflon, capped with plastic end-caps, and placed in sealable plastic bags. The soil <br /> samples were then labeled and transferred to a California Certified analytical laboratory using <br /> ' proper chain-of-custody protocol. <br /> 5.4 Groundwater Sampling <br /> All soil borings were advanced deep enough to allow sufficient water to collect. Shallow <br /> groundwater samples were collected from each boring by installing a temporary well to a depth of <br /> approximately 12 feet below ground surface (bgs) with ten feet of slotted polyvinyl chloride <br /> (PVC) screen, and bailing a grab sample through the temporary casing. In order to obtain <br /> groundwater samples from the lower aquifer, additional boreholes were drilled approximately 2 <br /> feet away from the original borings (SB-1, SB-2 and SB-3) using smaller diameter rods. Depth <br /> discrete groundwater samples from the lower aquifer were collected from each additional boring <br /> by using a Hydropunch rm tool. <br /> The groundwater samples were carefully poured into the appropriate sample containers. The <br /> samples were properly labeled and placed in a cooler with ice, and transferred to a California <br /> Certified analytical laboratory using proper chain-of-custody protocol. <br /> 1 <br /> ATC Associates Inc. <br /> 1:lln pmgras�QulKsroRQS 132(0003)1REPORT55200D1Add�r10808.doc 11 <br />