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• An approximately 2 foot thick zone of bentonite will be placed above the sand filter <br /> pack <br /> 1 . The annulus above the bentonite will be grouted with a cement slurry placed by <br /> tremmae of significant water is present in the boring The cement grout should <br /> extend to a depth of approximately 1 foot below the ground surface <br /> • A traffic-rated housing will be placed above the well casing and set in concrete <br /> The well housing should be set approximately one-inch above the ground surface <br /> The well number will be recorded on the well monument A locking device will be <br /> installed to minimize the likelihood of unauthorized access to the well <br /> • The grout will be allowed to cure for approximately 48 to 72 hours prior to <br /> monitoring well development <br /> • A well reference measuring point will be placed on the north side of the monitoring <br /> well casing The location and elevation of the top of casing at the reference point <br /> of the newly installed well and existing well will be surveyed relative to mean sea <br /> level by a licensed surveyor to second order accuracy <br /> O The water level and depth to the bottom of the well will be measured to the nearest <br /> 0 01-foot using an electronic water level indicator The presence of free-phase <br /> petroleum product will be assessed <br /> Well Development Procedures <br /> o Well development will be conducted by initially surging the well with a surge <br /> block, followed by removal of water with a pump and/or bailer Surging will be <br /> conducted over 5-foot intervals of the screened well casing, beginning at the <br /> bottom of the well Surging should be conducted at least twice over the entire <br /> length of the well screen Well development activities will be recorded on well <br /> development forms <br /> 0 A minimum of five well casing volumes of water will be removed from the well <br /> during development The temperature, conductivity, and pH of the groundwater <br /> removed during development of the well will be monitored Development should <br /> continue until the measured groundwater parameters have stabilized and the <br /> turbidity of the water removed has decreased to a degree as judged acceptable <br /> o Water removed from the well will be contained an a portable polyethylene tank <br /> The tank will be transported and stored at the IT office pending laboratory analysis <br /> and disposal of the groundwater <br /> ITCORPORATION <br /> SAC 111SACRFPIICOMMONIsacl)P120021P"P]818801880039IA 2ab doc <br /> (01020000) <br /> A-3 <br />