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1 <br />' 01 November 2005 <br /> AGE-NC Project No 02-0950 <br />' Page 2 of 9 <br />' • Boring B6 was advanced to a total depth of 35 feet bsg, approximately 52 feet north of <br /> monitoring well MW-3 <br />' 2 1 2 Soil and Grab Ground Water Sample Collection and Analysis <br />' Samples were collected from borings B5 and B6 at discreet 5-foot intervals, from 5 feet bsg to the <br /> total depth of the borings, using a 1 25-inch Geoprobe soil sampling assembly loaded with four <br /> 6-inch brass sleeves All sampling equipment was washed in an Alconox solution and rinsed twice <br />' with water prior to each sampling run For each soil sample collected,both ends of the second sleeve <br /> were covered with Teflon sheets, capped, and sealed with tape The samples were then labeled, <br />' stored on ice, and transported under chain of custody to Cal Tech Environmental Laboratories <br /> (CTEL), a State of California Department of Health Services (DHS)-certified analytical laboratory <br /> in Paramount, California Selected samples were analyzed for <br /> I • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) in accordance with EPA Method 8015 Modified, and <br /> I • * Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and the fuel oxygenates 1,2- <br /> dichloroethane (1,2-DCA) and 1,2-dibromoethane (EDB) in accordance with EPA Method <br /> I8260B <br /> Ground water was encountered at approximately 19 feet bsg, a grab ground water sample was <br /> collected at 30 feet bsg in boring B5 and 25 feet bsg in boring B6 The ground water samples were <br /> collected using a Geoprobe water sampling assembly with a pre-cleaned, 1-inch diameter 0 01-inch <br /> slotted polyvinylchloride(PVC)screen Each sample was extracted by lowering a Teflon hose-bailer <br /> Ithrough the hollow center of the push rods into the screened section Ground water samples were <br /> transferred into four laboratory-supplied, 40-milliliter (ml) volatile organic analysis (VOA) vials <br /> containing 0 5 ml 18% hydrochloric acid solution as a sample preservative, and into one 1-liter <br />' amber bottle without preservative After collection,the samples were properly labeled,placed on ice, <br /> and transported under chain of custody to CTEL for analysis The samples were analyzed for the <br />' petroleum hydrocarbon products listed above <br /> 2 13 Soil Logging <br /> After sample preservation,soil was extruded from the remaining sleeves and field-screened utilizing <br /> I an organic vapor analyzer (OVA) equipped with a photo-ionization detector (PID Thermo <br /> Environmental 580B, 10 0 eV, calibrated to isobutylene) The soil was also described visually in <br /> . accordance with the Unified Soil Classification System (USCS) Soil boring logs exhibiting soil <br /> IAdvanced GeoEnviranmental,Inc <br />