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_-INI GROUNDWATER <br /> !' TECHNOLOGY, INC. <br /> OIL 111111MOvIE 1Y S1'MuS 1433 KoiE Circle. Suitt I 11, San lose. Ck 4±i 1: r&Ogi 41:w% <br /> SOIL 210kDOG A19D <br /> GROUNEMATZR-MOMITOUM MINA <br /> Ourinq subourface inventigationo, iioil and water sanples are collected <br /> and analyzed in order to detect ;wind quantifY any contamination that <br /> zaY exist in the evil and/or groundwater. An affective method by <br /> which accoso of subsurface cample : collection is achieved is through <br /> the drilling of soil boring* and the installation. Of groundwater <br /> wells. This is also considered an effective Method of detecting and <br /> delineating the areal extent of *all and groundwater contaninetion. <br /> This boringo are drilled with a truck n*unted drill rig using hallow <br /> 1 <br /> ratan augers. The drilling is porfa}rned under the direction of a Meld <br /> geologist who aloe maintains a '' continuous log of the naterials <br /> encountered. <br /> In some cases, soil borings are ouboequontly converted into <br /> groundwator-monitoring wells. The valla aro constructed of <br /> polyvinylchloride (PVC) pipe and slotted PVC wall screen. A Troll pack <br /> consisting of sand is plaaod in iMe annulus (tho specs betwoan the <br /> bore holo and .gall vnaing) to allow grourAVater flog into the <br /> monitoring well. Tba mmitaring Vall to aecVleted Vith a bentonite <br /> neat, capant, and a traffic-rated streat bon to provide access to the <br /> well (see Attaachsont - %"Leal 1ftni;toring Moll Construction) . <br /> in addition to pravinq water sogp <br /> dile data for the initial subsurface <br /> investigation, tbo Installation 1'et a groundwater-monitoring well <br /> provides an extreaaly owyaniont coma for long to= nonitoring of <br /> groundwater clovotiono and groundabtar quality* <br /> 0242-10.21 <br /> MVkdk <br /> opde AMWr wf 1AW VA. ceodr..nd o.esraa <br /> Wwilww gfftcr W rwwft AX COMMA CA:SaV61110110. C.A:Sdm A**. CA; <br /> San Ja% cA; ropeom CA: Y,ngm CA.tq*wm& Co:fimoim- . wA <br />