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31 Januar2002 <br /> y <br />' AGE-NC Pi oject No 95-0128 <br /> Page 2 of 8 <br />' 2 1 1 Soil Sampling <br /> Soil samples were collected fiomboring EW1 at five-foot intervals, beginning at 30 feet bsg utilizing <br /> ra Cahfornia split-spoon sampler loaded with 2-inch by 6-inch brass sleeves The sampler was driven <br /> by dropping a 140-pound weight from a height of 30 inches The number of blows required to drive <br /> each 6-inch length of the samples (blow counts) was recorded on boring logs by an AGE staff <br />' geologist, boring logs are in Appendix A <br /> 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 designation, <br /> depth, time, date and sampler's initials I ' <br />' The soil samples duplicates, from 30 feet to 45 feet bsg, were monitored for the presence of organic <br /> vapor using an organic vapor meter equipped with a photo-ionization detector (PID Thermo <br /> Environrnental 580A, 10 0 eV,calibr atedto isobutylene) The soil samples were collected specifically <br /> fol permeability analysis <br /> 2 1 2 Equipment Decontamination <br />' The hollow stem augers were pie-cleaned prior to advancement of each soil pilot boring Sampling <br /> tools and brass sleeves used foi sample collection were thoroughly washed with a solution of <br /> Alconox, and were thoroughly rinsed with clean tap water prior to each sampling sequence All <br /> sampling equipment was washed in an Alconox solution and rinsed twice with water prior to each <br /> sampling run Following drilling activities, rinseate generated fi om decontaminating the equipment <br /> was placed in pi openly labeled DOT-approved model 17H 55-gallon drums and placed in the <br />' southeast portion of the site <br />' 22 WELL COMPLETION <br /> Borings EW 1 and EW-2 were single-completed as gi ound water exti action wells (EW-1 and EW-2) <br />' utilizing schedule 40, 6-inch diameter blank polyvinylchloiide (PVC) well casing and perforated, 6- <br /> inch diameter PVC well casing (0 020-inch slot) <br /> The wells was installed by placing the PVC well casing assembly through the hollow stem of the <br /> augers to the total depth of the boring The augers were incrementally raised as filter pack material <br />' was slowly poured down the annulus between the well casing and the inner wall of the hollow stem <br /> auger The filter pack material placed consisted of a 50150 blend of fine grained aquarium gr aver(3/8 <br /> gravel) and 2112 Monterey Sand The filtet pack was placed adjacent to the screened casing from the <br /> Advanced Geolinvironmental Inc <br />