Laserfiche WebLink
d <br /> - E <br /> 1 <br /> KLEINFELDER <br /> Construction details of the ground water monitoring wells are as follows: <br /> ._! o The well Basin <br /> gis 2-inch inside-diameter flush-threaded joint, schedule 40 PVC - <br /> pipe, f <br /> F <br /> ° The wells were constructed in 8-inch diameter boreholes, <br /> ° Well screen section perforations were 0.010-inch factory-cut slots. <br /> ° The screened sections were set 5 feet above and 15 feet below the depth j <br /> # epth where <br /> - <br /> ground water is first encountered. <br /> ° The PVC pipe was steam-cleaned prior to installation. <br /> ° The annular space between the pipe and the wall of the boring ' <br /> � g will be backfilled � <br /> with No:30 Monterey sand as a filter pack material to approidmately 1 foot above <br /> the top of the perforated section. <br /> I <br /> bN °. A 3-foot bentonite plug was placed above the sand pack to provide a seal against <br /> surface water infiltration. <br /> The F <br /> µmiacema.ning annular space will be filled with cement/bentonite grout to the <br /> r <br /> 1VIONFTORING WELL INSTALLA[TON AND SAMPLING PROCEDURES <br /> MONITARIIVG <br /> WELL INSTALLATION <br /> �,r 1 <br /> x Threeound ! <br /> 1 <br /> Sr water monitoring wells were installed to assess the-pFn - — <br /> resence-of-petroleu -T - <br /> rpt <br /> b3+drocar6ons in-the ground water. In addition, the wells were utilized to estimate the <br /> direction`and <br /> 1 z s gradient of ground water flow. <br /> monitoring wells was obtained from San Jo A permit for the installation of the <br /> again County as required b law State Water Code 137i'0), and an "intent to install y (California <br /> notification"was Sled with the De ground water monitoring wells <br /> ,f v partment of Water Resources. <br /> S. t <br /> J <br /> EBMUD-001-89-O0i <br /> F <br /> B-3 i <br /> r <br /> ite s <br />