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MAY z 5 2001 <br /> 22 May 2001 <br /> AGE-NC Project No 95-0167 <br />' Page 2 of 10 <br />' 21 SOIL SAMPLTI G <br /> Soil samples were collected from boring-'1\4W5 and MW6 at lave-foot intervals beginning at ten feet <br />' bsg utilizing a California split-spoon sampler loaded with 2-inch by 6-Inch brass sleeves The <br /> sampler was driven by dropping a 140-pound weight from a height of 30 inches The number of <br /> blows required to drive each 6-inch length of the sampler (blow counts) was recorded on boring logs <br /> by an AGE staff geologist, boring logs are in Appendix A <br /> t Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets <br /> capping and sealing with tape Each preserved sample sleeve was labeled with soil boring <br /> designation, depth, time, date and sampler's initials <br /> Each preserved sample was logged on a chain-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 /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Method 8015M and <br /> • Volatile aromatic compounds-benzene,toluene, ethylbenzene and total xylenes(BTEX) and <br /> methyl-tertiary butyl ether(MTBE) by EPA Method 8020 <br /> 2 2 EQUIPMENT DECONTAMINATION <br /> The hollow stem augers were steam cleanedrior to each bore hole advancement Sampling, tools <br /> p <br /> and brass sleeves used for sample collection were thoroughly washed with a solution of Alconox, <br /> and were thoroughly rinsed with clean tap water prior to each sampling sequence All sampling <br /> equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling <br />' run Following drilling activities, rinseate generated from decontaminating the equipment was placed <br /> in properly labeled DOT-approved model 17H 55-gallon drums and was stored on-site in an area <br /> lacking public access <br /> 23 SOIL LOGGING <br /> - During drilling activities, soil-sample duplicates were monitored for the presence of organic vapor <br /> using an organic vapor meter equipped with a photo-ionization detector (PID Thermo <br />' Environmental 580A, 10 0 cV, calibrated to isobutylene) and were visually described on boring logs <br /> • in accordance with the Unified Soil Classification System (USCS) Boring logs from MW-5 and <br /> Advaneed CeoEnvironmental Inc <br /> 1� <br />