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Department of Water Resources, 1967 ) . Therefore, it is <br /> highly unlikely the fuel components at this site have <br /> affected or will affect drinking water supplies. <br /> 2 . 5 Proximity of private, municipal and irrigation wells: <br /> There is one supply well on the subject property. All water <br /> for the site, including sinks and restrooms in the office is <br /> supplied by the well. The location of the on-site well is <br /> shown on Figure 2. <br /> 2 . 6 Proposed abandonment procedures and methodology: <br /> The tank location, relative to existing structures makes <br /> removal infeasible, therefore; a phased approach to <br /> abandonment in place is proposed. Phase I would include a <br /> demonstration that the tank has not leaked and does not <br /> present a threat to groundwater. Upon conducting a <br /> successful demonstration and acceptance by the County Public <br /> Health Services, Environmental Health Division and the <br /> Central Valley Regional Water Quality Control Board, Phase <br /> II will be implemented. Phase II would include actual tank <br /> abandonment activities and a final report as specified in <br /> Section 2. 6. 2. <br /> 2. 6 . 1 Phase I Activities <br /> WaterWork proposes to drill, log, sample, and abandon a soil <br /> boring beneath the existing tank. Overhead utility lines <br /> are located as shown on Figure 2, which make positioning of <br /> a drill rig difficult . Because of the overhead- <br /> interference, only one slant soil boring is proposed. The <br /> location and orientation of the boring is depicted on Figure <br /> 2. This boring will terminate beneath the longitudinal <br /> centerline of the tank approximately 25 feet beneath the <br /> tank bottom. The length of the boring will be approximately <br /> 30 feet. Samples will be collected at five foot intervals <br /> along the boring length. The boring orientation, location, <br /> and length should result in adequate coverage to detect any <br /> contamination due to tank leakage. <br /> Work will commence on the site within 30 days of receiving <br /> workplan approval. A drill rig will be scheduled upon <br /> approval of the workplan. The San Joaquin County Public <br /> Health Services Environmental Health Division will be <br /> notified 48 hours in advance of site work to allow <br /> observation of boring activities and bore hole abandonment. <br /> Underground utilities will be located by Underground Service <br /> Alert prior to commencement of drilling activities. <br /> Drilling will be conducted by a qualified driller under a <br /> C57 license using a hollow stem auger drill rig. Neat <br /> cement or cement/sand grout will be used for soil boring f <br /> abandonment. <br /> 3 <br />