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- <br /> -r1 <br /> a <br />:w <br /> f <br /> i , <br /> I Chevron/W. Benjamin Holt Drive 8 <br /> -`' June 1990 <br /> 1 <br /> (PVC) blank casing and 0.020-inch nachine slotted screen. <br /> � <br /> Groundwater at this site is expected to be approximately pproximately 15-feet <br /> below grade and has shown a seasonal fluctuation of plus or minus <br /> approximately 1 foot. As such, the wells will 1::nst likely be <br /> completed to a depth of 25-feet below grade with a screened <br /> interval from 10- to 25-feet below grade. A filter pack. of <br /> s clean, No. 2 Monterey sand will be set in the annular space <br /> around the well casing and will extend from the bottom of the <br /> ! screened interval to approximately 2-feet above the top of the <br /> well screen. A seal of hydrated bentonite pellets approximately <br /> i <br /> 2-feet thick will be set above the sand pack and the well will <br /> i <br /> then be sealed to grade with cement grout. The wellhead will be <br /> encased in a traffic-rated street box and equipped with a locking <br /> plug. <br /> WELL SURVEYING AND DEVELOPMENT <br /> After installation, the wells will be surveyed by a <br /> professional surveyor to determine position and wellhead <br /> elevation. These data will be used in conjunction with water <br /> level monitoring data to produce a potentiometric surface map for <br /> the site. <br /> After allowing sufficient time for the well seals to harden, <br /> 3 Groundwater Technology w;.11 develop the newly installed <br /> monitoring wells. The wells will be developed using a truck- <br /> mounted development system. The wells will then be subjected to <br /> -alternate rounds of bailing and surging until the water extracted <br /> from the wells is relatively free of silt. <br /> Water generated during well development will be placed in <br /> 55-gallon steer, drums and stored on site pending proper disposal. <br /> F _ <br /> .C. GROUNDUPATER <br /> TECHNOLOGY,INC. <br />