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09 May 2003 <br /> AGE-NC Project No 96-0232 <br /> Page 8 of 16 <br />' purged ground water was transferred to the ground water remediation system holding tank for <br /> treatment and disposal <br />' 3 2 GROUND WATER SAMPLING <br />' Ground water samples were collected from the purged wells MW-1 through MW-7,MW-14 through <br /> MW-18, EW-1 and EW-3 utilizing new, 2-inch diameter disposable polyethylene bailers, ground <br /> water samples were collected from the purged wells MW-8 through MW-13 utilizing %-inch <br /> diameter polyethylene tubing Ground water samples were transferred into one-liter amber bottles <br /> without a preservative and into 40-m1 EPA-approved VOA vials containing 0 5 ml 18%hydrochloric <br /> acid as a sample preservative Care was taken to ensure that visible air bubbles were not present in <br />' the vials after filling and capping Ground water sample containers were labeled with the well <br /> designation, date, time, and sampler's initials <br />' Ground water samples were collected at sampling ports located near the tops of extraction wells <br /> EW-2 and EW-4 through EW-10, each extraction well was allowed to be operational for at least 30 <br /> minutes prior to collecting samples directly into the sample containers <br /> In addition, ground water samples were collected from municipal water wells CSA-1, CSA-2 by <br /> opening a valve from each water well outlet sample port and allowing each well pump to turn on and <br /> operate for a minimum of 15 minutes to purge the wells and then collecting the running water <br /> directly into the sample containers <br /> 3 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br />' Each ground water sample was logged on a cham-of-custody form,placed in a chilled container and <br /> transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br />' for <br /> TPH-g, TPH-d and TPH-mo by EPA Methods 503013/8 015C Modified and 3510C/8015C <br />' Modified, respectively, and <br /> c Methanol, ethanol and MTBE by EPA Method 8260 Modified <br /> Advanced GeaEnvironmental,Inc. <br /> r <br />