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Section 3 GK 2012 <br /> .lti��Ja C't.h' <br /> Drilling Methods and Permits <br /> Prior to drilling, permits will be obtained for well construction from the San Joaquin County <br /> Environmental Resources Department and the California Regional Water Quality Control Board. <br /> The contact information is as follows: <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton, CA 95202-3029 <br /> California Regional Water Quality Control Board <br /> 11020 Sun Center Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Boreholes will be probed on 5 foot intervals for the presence of standing water. A continuous <br /> core of the boreholes will be collected and logged for each well pursuant to the Unified Soil <br /> Classification. <br /> Well Development <br /> The drilling contractor will develop the wells using a combination of methods. Where practical <br /> and where formation stability permits, development by gently swabbing the wells with a surge <br /> block will be initiated before the installation of the transitional seal and sanitary seal to ensure <br /> settling of the filter pack prior to sealing the annulus. Once the seal has been installed and has <br /> set up (no less than 12 hours), further development by vigorously swabbing of the wells with a <br /> surge block and manual bailing will be used. This action will continue until the concentration of <br /> suspended solids in the water bailed from the wells is sufficiently low to permit pumping with a <br /> portable submersible pump. Accumulated fill shall be removed from the bottom of the well <br /> screens. Development will continue until the turbidity of the discharge measured in the field <br /> runs clear to the unaided eye or is 5 Nephelometric Turbidity Units or less. Water discharged <br /> from the wells during development will be disposed of directly to land surfaces. No water <br /> discharged during development will be allowed to enter a surface water drainage course. All <br /> equipment shall be cleaned according to the field sampling methods, prior to introduction to <br /> any of the wells. <br /> Well Disinfection <br /> The proposed monitoring well will not be disinfected unless monitoring results indicate <br /> persistently elevated densities of coliform present over three consecutive quarters of <br /> groundwater monitoring. Recommendations for subsequent disinfection procedures will be <br /> presented within the WWTF's quarterly or annual groundwater monitoring reports should <br /> coliform densities fail to decline over that period. <br /> 12 1City of Riverbank Waste Water Treatment Facility Background Water Quality Monitoring Well Work Plan <br />