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_ October 13, 2004 <br /> NOA Project Number: E040109A <br /> 3.6 Septic Repair Permit History in the Vicinity <br /> The following septic system repair permits were found for the vicinity of the Site during file review <br /> at EHD on October 4, 2004: <br /> Table 2. <br /> Vicinity Septic System Repair Permit Summary. <br /> Now <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> •• 12051 E.Tokay Colony,12-4- 1,200 gal Not reported Addition of one 40-ft leach line,one <br /> 02 36-in diameter by 25-ft deep seepage <br /> pit to existing residential unit. <br /> 12233 E.Tokay Colony,10- Not reported Not reported Addition of one 40-ft leach line,two <br /> 18-96 36-in diameter by 25-ft deep seepage <br /> pits to existing residential unit. <br /> 12335 E.Tokay Colony,10- Not reported Not reported Addition of one 40-ft leach line,two <br /> 18-96 36-in diameter by 25-ft deep seepage <br /> its to existing residential unit. <br /> The repairs entailed the addition of new leach lines and seepage pits to existing residential units. <br /> 3.7 Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage on each parcel would be for a primary residence and second dwelling <br /> unit. Septic system design should be based on the On-Site Wlastewater Disposal Standards or other <br /> engineering recommendations. <br /> �.0 GROUND WATER INFORMATION <br /> v'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 100 and 110 feet below ground <br /> surface. <br /> The ground water gradient and flow direction are not well defined below the Site. For the Fall 1998 <br /> period, the ground water flow direction and gradient are undetermined. For the Fall 1999 period the <br /> ground water flows northward at an undetermined gradient below the Site. <br /> No ground water was encountered by the staff of Neil O. Anderson&Associates, Inc. during the <br /> 4 <br /> w <br />