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a <br /> ?ave 3 <br /> ,Ir. Ilio tiotini <br /> :,Iav 2S, 1991 <br /> Standard ERM-West, Inc. Quality Ass rthe cons ru lit Control <br /> s(RAIQaugers <br /> procedures were followed throughoutThe <br /> were deContaminatedprior to <br /> d cont urinated prior to eadrilling each well ch useSteam eby wst g in an <br /> sampling device was <br /> Alconox solution followed by a clean water rinse. The brass <br /> �eswel tube <br /> eas sig, for <br /> the sampler were similarly cleaned prior to drilling. <br /> screen, etc• was cleaned and decontaminated prior to use by steam! <br /> ttings from each boring were placed in labeled 55-ga <br /> cleaning. Soil cu !Ion <br /> drums and stored on site. <br /> �illlDvl urn n 11ar-�� <br /> Following construction, the new wells were developed and the pre-existing <br /> wells were purged prior to sampling. Development was accomplished by <br /> hand hailing approximately 18 gallons or 12 to 13 well volumes from each <br /> well. The bailing abiliz d, and the silt content of the d scharge as continued unl the parameters of tempaturepH <br /> and conductivity stabilized, water <br /> markedly declined. The pre-existing wells were purged by bailing a similar <br /> volume of water. <br /> QAlQC procedures were followed during development and purging. Friar <br /> (jecontarninatedwith an <br /> to work at each well, the followed by bailer <br /> was cleai water rinse Bailer cord was replaced <br /> Aiconox so <br /> pros <br /> between es was contain daine 55 gallon drater and umseand storedons site.procedures <br /> After development and purging procedures were completed, all wells were <br /> re-cleaned Teflon bailer <br /> sampled. The wels were <br /> h a rlemo able petcock` Watered with a rwas transferred from he bailer <br /> r equipped wi lied bottles. samples (-water and soil) provided to the <br /> into laboratory supe plastic bags <br /> laboratory were labeled and seal,d individually in zip lock type <br /> then placed on ice in a cooler, <br /> 52 <br /> it �n W rAn 1 s <br /> The soil and water samples were submitted to Curtis &Tompkins, Ltd., a <br /> oratory locate <br /> California Department of Health Services (DHS) ceundered achain-of-custody <br /> in Berkeley, California. The samples were shipped <br /> and analyzed according to the following test procedures: <br /> • Total Petroleum Hydrocarbons as Gasoline, EPA Method 8015-'Modified- <br /> Benzene, Toluene, lthvibenzenes and Xylene (BTE&X), EFA Method <br /> 8020. �I <br /> Organic lead; DHS Method;- - - - <br /> F"S <br />