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1 <br /> = 5 ^ l t <br /> 24 January 1997 - <br /> AGE-NC Project No 97-0288 <br /> Page 2of5 i <br /> II <br /> a , <br /> AGEs Geoprobe 5400 probing unit equipped with i 25-inch diameter probe rods ana a 2 15-inch <br /> diameter soil sampling assembly The locations of the seven probings are as follows (see Figure 2) <br /> probing B 1 was located near the septic system leach lines, probings B2 and B3 were located near <br /> the 12,000-gallon diesel UST location, probings B4 to B7 were located near the UST cluster near <br />' the west side of the,property Probing B i was advanced to a depth of approximately 10 feet bsg, <br /> probings B2 through 137 were advanced to depths of approximately 12 5 feet bsg <br /> Soil samples were collected from probing B I at a depths of 5 feet and 10 feet bsg, soil samples were <br /> collected at depths of 6 feet and 12 feet bsg in probings B2 through B7 All samples were collected <br /> using the Geoprobe soil sampling assembly loaded with four.brass sleeves After collection,the ends <br /> of the second brass sleeve were covered with Teflon sheets,capped and sealed with tape The sleeves <br /> were labeled placed in a chilled container and transported to Castle Analytical Laboiatoryl(Castle) <br />' under chain-of-custody w <br /> I <br /> Grab ground water samples were collected from probings B1, B3 and B4 using a Geoprobe water <br /> sampling assembly Each ground water sariiple was collected in 40-m1 VOA vials containing 0 5 ml <br /> of 18% hydrochloric acid as a preservative and in 1-liter amber bottles without preservative The <br /> . samples were labeled,placed in a chilled'container and transported under chain.-of-custody to Castle <br /> Al! <br /> probing rads, sampling tools and sample liners used for sample collection were thoroughly rinsed <br /> with clean water after washing with a solution of Alconox between each sampling run All piobings ' <br /> were,backfilled over their entire depth with Portland Cement <br /> 32 LOGGING <br /> 3 Soil was extruded from thelremaining brass sleeves and screened for the presence of organic vapor <br /> using a photo-ionization detector (FID Thermo Environmental 580A, 10 OeV' , 'calibrated to <br /> isobutylene}, and the readings were recorded on the boring logs Soil was described in accordance <br /> with the=Unified Soil Classification System (see Boring Logs, Appendix A) <br /> I ) <br /> 3 3 SAMPLE ANALYSIS <br /> I r <br /> 4 1 4 <br /> One soil `sample from probing B I was analyzed for halogenated volatile organic compounds in <br /> accordance with EPA methods 8010 Samples from the remaining probings were analyzed for total <br /> petroleum hydrocarbons quantified as diesel (TPH-d)`and volatile aromatic compounds (benzene, <br /> toluene, ethylbenzene and,xylenes BTE&X) in accordance with EPA methods 80151n/5030 and <br /> I ' 8020/602, respectively Samples from probings B4 through B7 were also analyzed for TPH as <br /> • gasoline (TPH-g) and methyl tertiary-butyl ether (MTBE) in accordance with EPA methods <br /> e <br /> t <br /> F <br />