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yO kNO <br /> - .w, <br /> L -.1� �� Aye <br />.'S <br /> ilmolk <br /> •i <br /> Chevron/w. Benjamin Holt Drive 8 <br /> ' June 199 <br /> (PVC) blank casing and 0.020-inch machine slatted screen. <br /> Groundwater at this site is expected to be approximately 15-feet • <br /> below grade and has shown a seasonal fluctuation of plus or minus <br /> approximately 1 foot. As such, the wells will most 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 /> 2-feet thick will be set above the sand pack and the well will <br /> 1 <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 I]EVELopMENT <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 far <br /> the site. <br /> After allowing sufficient titue for the well seals to harden, <br /> Croundwater Technology will develop the newly installed <br /> monitoring wills. This 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 /> i <br /> i from the wells .is relatively free of silt. <br /> Water, generated :During well development will be placed in <br /> 55-gallon steel drums and stored on site pending proper disposal. <br /> F • <br /> GROUNDII'ATER <br /> ,� _ TECHNOLOGY,INC. <br />