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0 <br /> F1 August 29, 2006 <br /> NOA Project Number: E06084A <br /> Table 2. <br /> F1 VicinitV Se tic S stem Re air Permit S.mmary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> F1Capacity <br /> - 3300 West Durham Ferry Road Addition of one,90' Repair/Addition <br /> 11-18-$G leach line <br /> The repair permit found during the file review was for the addition of a leach line. <br /> F13.7 Expected On-Site Maximum Septic Tank Usage <br /> � <br /> The maximum on-site expected septic tank usage would be for a primary residence and a secondary. <br /> F1 dwelling unit. Septic system design should be based on the On-Site Wlastewater Disposal Standards ori <br /> other engineering recommendations. <br /> 4.0 GROUND WATER INFORMATION <br /> 4.1 Ground Water Depth and Gradient <br /> f' The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the Site. <br /> The Fall 1998 and Spring 1999 maps are the most current maps available from the county. <br /> Examination of these maps indicates that no water level data is available for the Tracy/Banta area, <br /> which includes the Site, and no definite comments as to depth or gradient flow direction can be <br /> made. O ,a 3, 2006, our office drilled a groundwater boring on the subject property to a depth <br /> of 8.5 fe t; no oundwater was encountered. <br /> 4.2 Potential Ground Water Contamination Issues <br /> Identifying potential ground-water contamination sources was not part of the scope of work for the <br /> soil suitability study. <br /> Potential ground-water contamination can occur from a number of sources which often include <br /> leaky underground storage tanks, agricultural activities, dairies, septic systems,and storm water <br /> 19 infiltration. Any past agricultural activities and the present use of septic systems in the area should <br /> be considered potential ground-water contamination sources. <br /> 4 <br /> F1 <br /> t <br /> t Ft <br />