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f <br /> , rrno l nstrrctior `Eeveld went and levatid Sulrve <br /> Gregg; a'11 rve wells within 8-inch i met6r sail f �i circ tot to c . <br /> ppraxim te(y f Gregg Drilling ct nstru ted all five wells with 2A feet of t~ o4nch <br /> diameter, heck*40, flush-threaded and machine-slotted (0.02040*polyvinyl OftrtO#P1 <br /> well screens. sp trot from 40 to 60 feet bgs. Blank,two-inch dtamitd� PVC casings Were <br /> d threaded into tops tyf the well screens and extended to the surface. <br /> Gregg l rrllrrag I led fl or packs cif Monterey 3 graded and washed san. within e annular <br /> ..spaces "till scree"and boreholes, and approximately two f oft t1w. tops of the <br /> . ..."screened interval (l.et.,38 bgs). Overlying the sand packs, Gregg 13r liing pled thre� to <br /> 1Tfivemt s t layers lid berstonite chips writhin tete annular spaces'betweWi th+ borehs�es and. <br /> the well casings , the hydrated bentonite, surface seals of neat cement were installed. <br /> f <br /> "he tops t the were sec fired with watertight caps and 12-inch iameter,tr`d#lio�ratevl.and <br /> fiUsh-r punted stmet.bbixess set in concrete. The well construction is iliustrat ;d on the monitoring <br /> well logs, which ars"included as appendix B. <br /> ,lurne rsd 2 , carnage nvironment l developed the -installed monitoring <br /> wells. -well vs as surd with a surge block and purged with a centrifugal pump. <br /> Approximately mately t6 to 21.6 gallons of groundwater were purged from each of the five wells. During <br /> well development,between 0.05 and 4.28 feet of accumulated sediment was removed from the <br /> five wells. The well development field sheets are included in Appendix C. <br /> On June 28 2007, Morrow Surveying (band Surveyor License 61)surveyed the wellheads. <br /> Morrow Surveying located the wells and other site features, and measured the elevations of the <br /> tops of the well casings to the nearest 0.01-foot, referenced to GPS coordinates. The surveyor's <br /> report`is incJuded as Appendix D. <br /> 2.2.E Sol Santr llrtg anal Analnis <br /> At f6bt intervals durtrtg the4filling of all five wells, Grog Drilling collect d undisturbed soil <br /> sarnpiS g a Callferni split-spoon sampler lined with o.in t diameter lir six-itch <br /> long stern s rnle sleeves. Ramage Environmental ge idgist I g i Bch c>f thew <br /> ndisturbed soil for hydrogebloglc and lithologic characteristics adddtfto to the Un led <br /> PP` <br /> €l lassifit e M , arra screened the recovered soil for organic vapors us�ing.a <br /> photo ion atrert�br113). <br /> 7 <br />