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Mr. Skibo <br /> July 9, 2004 <br /> Page 4 <br /> Table 1. <br /> Surrounding Septic System Permit Summary. <br /> Address,Daze Tank Capacity Lines,Length,Pits Comments <br /> •— 27274 N Mackville Rd., 1200 gallons (2)40' lines,(2)25' deep New installation,Residence <br /> 6/19/91 seepage pits <br /> 27551 N.Mackville Rd.., 1600 gallons (3) 15' lines,(3)25' deep New installation,Residence <br /> 10/01/03 seepage pits <br /> 27700 N.Mackville Rd.., 1200 gallons (2) 100' lines, (2) 33' deep New installation,residence <br /> 05/05/82 1 1 seepage pits <br /> By examination of the permits, it appears that leach lines with seepage pits are utilized in the <br /> area. Most permits were for additions and repairs. No permits were found for the subject <br /> site. <br /> 3.6 Expected On-Site Maximum Septic Tank Usage <br /> One primary residence and one legal second dwelling unit per parcel are allowed by the <br /> zoning designation. Each residence could may have one septic system. Proposed Parcel 1 has <br /> a primary residence and a second dwelling unit. Parcel 2 is undeveloped cattle pasture. The <br /> maximum septic tank usage would be up to two systems per parcel. <br /> — 44.0 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) <br /> _ ground water depth and elevation maps were reviewed to determine the ground water levels <br /> near the Site. The Fall 1998 and Spring 1999 maps are the most current official maps available <br /> from the county. According to these maps (Plates 3-6), ground water lies at about 180 feet <br /> below ground surface in the vicinity of the Site and flows to the west at a rate of <br /> approximately ten feet per mile. <br /> — <br />