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September 9, 2005 <br /> NOA Project Number: E0501 1B <br /> Address,Date Tank Lines, Length, Pits Comments <br /> Capacity <br /> 14629 Wildwood Road -- One 40'leach line and 36"in Repair/addition to a residential <br /> 11-18-93 diameter and 25'depth system <br /> seepage pit added <br /> All of the repair permits found in the vicinity were for the addition of leach lines and seepage pits. <br /> 3.7 Expected On-Site Maximum Septic Tank Usage <br /> One primary residence and a secondary dwelling will be the maximum expected septic tank usage <br /> for each lot on the subject property. Septic system design should be based on the On-Site Wastewater <br /> Disposal Standards or other engineering recommendations. <br /> 4.0 GROUND WATER INFORMATION <br /> 4.1 Ground Water Depth and Gradient <br /> 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 official maps available from the County. <br /> According to these maps (Plates 3-6),ground water lies between 70 and 90 feet below ground (Z�Q) <br /> surface and flows at a gradient of about 10 feet per mile to the north-northeast in the vicinity of the <br /> Site. <br /> No ground water was encountered by the staff of Neil O.Anderson&Associates, Inc. during the <br /> drilling of four percolation test holes to a depth of 25 feet on August 24,2005. <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. Potential ground-water contamination can occur from a number of sources <br /> which often include leaky underground storage tanks, agricultural activities, dairies, septic systems <br /> and storm water infiltration. Agricultural activities and the use of septic systems in the area should ( y, <br /> be considered potential ground-water contamination sources. <br /> 4.3 Water Sample Location <br /> 1 <br /> Three agricultural wells exist on the si e. No pe were was found during file review at EHD on <br /> August 23,2005.A water sample was taken y Ms. Nancy Rosulek on August 23,2005 from the <br /> eastern most agricultural well near the center of the subject property. <br /> 4 <br />