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• Kennedy/Jenks Consultants <br /> 3. Ensure that filter pack sand for the well extends to approximately 3 feet above the top of the <br /> screened interval. <br /> 4. If required in the well construction permit, notify the appropriate inspector prior to placing the <br /> well seal. <br /> 5. Place a 2- to 3-foot thick bentonite pellet seal above the sand pack, as the auger and/or casing <br /> is removed from the boring. If the seal is placed above the water table, the bentonite pellets <br /> must be hydrated with potable water prior to placement of the annular seal. <br /> 6. Fill the remainder of the annulus between the well casing and the borehole wall with <br /> cement/bentonite grout (with approximately 5 percent bentonite), or a high-solids bentonite <br /> slurry (11 to 13 pounds per gallon), to a depth of approximately 1 foot below ground surface. If <br /> the water level is higher than the seal, use a tremie pipe to place the grout. <br /> 7. Install either a threaded cap or a locking watertight expansion plug on the monitoring well. Place <br /> a steel hasp-locking well housing over the top of the well and cement it into the annulus of the <br /> boring. <br /> 8. Place a traffic-rated precast concrete or steel well enclosure approximately 1 to 2 inches above <br /> grade, and cement it into place with concrete. Have a concrete apron constructed around the <br /> well housing enclosure to facilitate runoff. <br /> 9. For aboveground completion, ensure that the well casing extends approximately 3 feet above <br /> ground surface. An 8-inch diameter hasp-locking steel well housing surrounds the well casing. <br /> Traffic bollards can be installed around the well housing as necessary. <br /> 10. Repeat Steps 1 through 9 for all monitoring wells at site. <br /> 11. Following the curing of the grout (approximately 24 hours), each monitoring well is developed. <br /> Prior to development activities, measure the depth in each well to static water level and total <br /> casing depth. <br /> 12. If a monitoring well has a water level of less than 25 feet, it may be developed by using a <br /> centrifugal surface pump with dedicated 1-inch I.D. clear flex suction hose, placed with the hose <br /> intake placed temporarily at all levels of the screened interval. If the well is greater than 25 feet <br /> deep, a submersible pump or airlift pump with air filter is used for development. In either case, a <br /> surge block of appropriate size can be moved up and down inside the screened section of the <br /> well casing to create a surging action that hydraulically stresses the filter pack. <br /> 13. During development of each well, ensure that field parameters and observations are recorded <br /> on a Kennedy/Jenks Consultants purge and sample form (attached). Information to be recorded <br /> includes, but is not limited to, the following items: <br /> a. Depth to water <br /> b. Development time and volume i <br /> c. Development (flow) rate <br /> d. pH, temperature, specific conductivity, and turbidity <br /> Monitoring Well Installation Work Plan SOG 3 <br /> Delicato Family Vineyards, Manteca, California Page 2 <br /> y.9's.Wwp'&niayoblO7W76MO1.00-Osk&fOMIVSVwinstag x phleppandk#0"Ud"l Dp X I <br />