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Drill cuttings were logged continuously for charactorlzation of <br /> Contamination and all typo by an oaper3enced staff g..1.gSat <br /> using the Unified Sbll Clns sl£l ea ti on System, Deaarl ptt ons of <br /> soil' enceuntorod and ...Itaring we 11 a natruc tion detail, were <br /> recorded on the boring/wall log (AttaChmant I). <br /> Solle a untered,w onit'ored for organin vapors by placing a <br /> mall a ant of re presentative mat,Ylal in a ea f ed container, <br /> than measuring the concentration of volatiles collected in the <br /> head apace of the container with a photoienizatien detector (PID) <br /> at <br /> calibred to the lsohutylenB mol...le With isobutylene 0% The <br /> values obtained at each ......a—nt point were recorded an the <br /> s. <br /> boring lagSoil c ttinge generated during the drilling I...... { <br /> also screened for the presence of volatile organics using a <br /> DIDB <br /> I <br /> soil samples submittedfor analysis were saleoted based on <br /> llthalogic observationsand obvl.us signs of contamination (i.., <br /> PSD readings, .dors, and/or soil diecolnrotion). Samples ware <br /> collmtofl, preserved, and transported anderchain-of-custody in <br /> Orden.. with Wat—Wk-. soil sampling protocol (Attachment <br /> 2)c orSelect samplesanalyzed for total. 9 gasoline <br /> petroleum <br /> hydrcarbon. a (TPU.), end benzenes, toluene, <br /> ethylbeezene, andsylanes (UTEX), by EPA methods 0015/8020. <br /> Sequoia analytical performed the analyses. Tha minimum detectlon <br /> level for DTEX in .oil samples analyzed by S'quoia Analytical Se <br /> 0,005 ppm; for liquid samples 0.30 ppb. The minimum detection <br /> level' for TPHG in soil, i. 1.0 ppm) for ll quid ...plan 30 ppb. <br /> Subsequent to installation and well d'volopmcnt, water samples f <br /> Were <br /> collected from trio monitoring Hell after purging a minimum <br /> of four well lames (casing and sand pack) from aPCh w011,-` <br /> Stehiliza tion of Bleatr3c candu.Ul ty, pH, end temperature w <br /> Ch a' <br /> during purging to .near. that samples collected are I <br /> representative of formati.n Water. Water ,ample collection and 4k <br /> pro sorvatlon was in accordance With WatarWork's,groundwater f� <br /> amp li ng protocol (R{ta chment 2). Saila re with bott.m Cmptyi ng <br /> day.... wusad to reduce Volat321¢atton. The Water samples <br /> h Were analyzed by to Analytical for UTEX, and TPHG by EPA <br /> method. 8015/8020, <br /> oaring well development/purging drawdowns were <br /> data <br /> will onitored in order <br /> i to e.tlmato formation trenemisnlvity. ThisbB usnd I <br /> along with the lithologic d...riptlons to assess contaminant <br /> pathwaya and volocltius. <br /> The field invussell W on was Califor i unflor the threat �! <br /> supervision bE Ru essll W. JunCal, California Ra gistexed Geologist <br /> Ho. 3844, end Nora 11, Rate.ka, California Regist.red Civil <br /> Engineer No. 38322. <br />