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t <br /> s ^v <br />' 30'May'1997 <br /> AGE-NC Project No 95-0142 <br /> Page 2 of 6 <br /> 2 2 GROUND WATER SAMPLE COLLECTION <br /> I <br /> Water samples were collected from each purged well (MW-3, MW-4, VW-1 through VW-4) using <br /> new, clean, disposable plastic bailers Immediately upon retrieval,the samples were transferred into <br />' 40-m1 VOA vials containing 0 5 milliliters of 18% hydrochloric acid as a preservative and placed <br /> in a chilled container The samples were transported in under chain-of-custody to McCampbell <br /> Analytical, Inc , (MAI) in Pacheco, California for analysis <br /> All samples were analyzed in accordance with EPA Method 8015/5030 for total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g), volatile organic compounds (benzene, toluene, <br />' ethylbenzene and xylenes BTE&X) and methyl-tert-butyl ether (MTBE) sn accordance with EPA <br /> Method 602 <br /> 23 COLLECTION OF PURGED WATER SAMPLES <br /> One drum of purged round water from the,December 1996 monitoring events was on the site At <br /> p g g g <br /> liethe request of Stockton Plating, a water sample was collected for disposal characterization The <br /> sample was collected using a disposable plastic bailer Two 40-m1 VOA vials of water were <br /> collected, labeled, placed in a chilled container and transported under chain-of-custody to MAI for <br />' analysis The sample was analyzed for TPH-g and for BTE&X with MTBE in accordance with EPA <br /> methods noted above <br /> 24 GROUND WATER MONITORING WELL INSTALLATION <br />' 2 4 1 DRILLING AND SAMPLING <br /> On 24 April 1997, soil boring MW-5 was advanced at the site The boring location is illustrated on <br /> Figure 2 The soil-boring was advanced to a depth of 45 feet below surface grade (bsg) Drilling was <br />' performed using a truck-mounted CME 75-HT drill rig equipped with continuous flight, eight-inch, <br /> hollow-stem augers The drill rig and two-man crew were supplied by Soil Exploration Services <br />[, (SES) of Rancho Cordova, California <br /> Samples were collected at five-foot intervals in all borings, using a split tube sampler loaded with <br />' three clean,2'-inch by 6-inch brass sleeves A 140-pound hammer was used to advance the sampler, <br /> 18 inches, the number of blows required to advance the sampler in 6-inch increments was recorded <br />' on the boring logs All sampling equipment was washed in an Alconox solution and rinsed twice <br /> with water prior to each sampling run <br />