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July 19, 2006 <br /> NOA Project Number:E06015A <br /> Page 2 <br /> Table 2. <br /> Vicinity Septic System Repair Permit Summary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity- <br /> 4108 Newton Road - Repaired drain 40'and Repair/Addition <br /> 4-20-78 sump <br /> 4108 Newton Road 15oo gal Two,83'leach lines Repair/Addition <br /> 6-3-96 One 25'x 42" seepage pit <br /> 4040 Newton Road 800 gal One 90'leach line Repan/Addition <br /> 5-3-63 One 25'x 33" see a e pit <br /> The repair permits are for a repaired drain and the addition of leach lines and seepage pits. The <br /> permits are attached. <br /> 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 40 and 60 feet below ground <br /> surface in the vicinity of the Site. Due to the complex shape of the contours in the area,it is <br /> difficult to measure the gradient. However,groundwater appears to flow to the south or southeast <br /> through the immediate vicinity of the Site. <br /> No ground water was encountered by the staff of Neil O.Anderson&Associates, Inc. during the <br /> drilling of the percolation test holes to a depth of 25 feet on March 28, 2006. <br /> If you have any further questions please do not hesitate to call. Thank you for your continued <br /> interest in our work. <br /> NEIL O.ANDERSON&ASSOC.,INC. <br /> N icy R. I mer,B- . <br /> Staff Scientist <br />