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r.. <br /> November 1990 G <br /> ~ -C3- <br /> f M88168D <br /> sleeve and two end caps were cleaned between each use with a nonphospnate <br /> i <br /> detergent =olution and rinsed with potable water, and air dried to prevent <br /> contamination. crass- <br /> t <br /> Prior to the collectior, of each sample, the sampling equipment was <br /> decontaminated u <br /> _ ing a nanphc;Sphate detergent wash, followed by a tap water <br /> rinse, wad two distilled water rinses. <br /> The sampling sleeves were decontaminated <br /> prior to initiatin tha_, <br /> t g e ssessment using the grime protocol described above. <br /> 4 MpNITORINO WEU CONSTAUCTIOF <br /> fM <br /> MV was drilled to a depth of 80 feet b s. The monitorin well was <br /> ` completed as a 4-inch-diameter ground water monitoring well pursuant to t <br /> _ 8 . <br /> California Administrative Code, Title 23, Subchapter 16, Article 4 he <br /> The details Section 2647, <br /> of the well construction sre sawn in Table C_1 _ Section <br /> Weli <br /> z i Construction Summary, <br /> s The monitoring well (MW-1) con^zsrs of.4-inch-diameter, Schedule 40 <br /> t PVC i <br /> {' Pipe set to a depth o£ 80. feet bgs. . The 4-incEt-dLameter` well scre 1 <br /> machine slatted into £our columns o - <br /> t t ei. is ` <br /> _ f 0.020-inch ho.iz)ntal cuts, The perforaLed d <br /> interval extends to'the bottom of the well from 40 feet bgs and is overlain b , <br /> J 40 feet of 4,' Y <br /> inch-diameter Schedule 40 blank riser casin <br /> F consists of No. g- The gravel pack <br /> 3 Monterey Sand; which was poured .into the annular space g <br /> € surrounding.the perforated ic.;erval from the.well b gx <br /> r 1 <br /> b s ottom to a depth of 38 feet <br /> � � $ A'S-foot-thick .bentonite. seal wasz <br /> placed above the gravel:pack and the ' <br /> } remainder of the annular space consists of a cemeat/bentonite. seal. The wallhead <br /> =' <br /> ' was secured and protected with a traffic-rated utility vault con <br /> c structed slightly <br /> ! above the existing grade as to <br /> provide f6r positive surface draina } <br /> 4 ( built disgram or ge. 4n as- <br /> the monitoring .weil is. Presented in Appendix A. <br /> f <br /> r � , <br /> J <br /> GROUND WATFM'3AIiPLiNG.. - - - - - - - - -- ----- - - — <br /> ` } A:gxound wateram <br /> lwaters <br /> P was collected from within the hollow stem sages <br /> ac DR-2 ,from a depth of 90"feet b s.` <br /> r, g The ground water gam <br /> a 3-foot-lon G_ sample was collected in <br /> j g, inch-diametez .disposable bailer: The water sample was <br /> r ; transferred into 40 �n1 VOA vials (two per P sar1ple) and a I-liter amber bottle, <br /> -iJ : <br /> i . <br />