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C) April 29, 2005 NOA Project Number: E05040A Table 2. Vicitu Se tic System Repair Permit Summary F1` Address,Date - Tank Lines,Length,Pits Comments CapacityT 14044 South Campbell Road, Not reported One 4 foot by 12 foot by 14 Addition made to a residential 4/30/1974 foot sump system 14108 South Campbell Road, Not reported One 16 foot leach line and Repair/addition to a residential 6/6/1975 one 12 yard pit system F1 16482 South Campbell Road, Not reported Two 40 foot leach lines and Repair/ addition to a residential 11/18/1993 two 25 foot by 36 inch system seepage pits 16538 South Campbell Road, Not reported One 40 foot leach line and- Repair/ addition io a residential . 3/31/1988 one 12 foot by-4 foot by 20 system foot sum The repair permits found in the vicinity were generally for the addition of leach lines, pits or sumps. :3.7 Expected On-Site Maximum Septic Tank_Usage Please see section 3.4.1 of th Part II, Nitrate Loading Study, for maximum septic tank usage. Septic system design should be based on the On-Site Vastewater Disposal Standards or other engineering recommendations. 4.0 GROUND WATER INFORMATION y 4.1 Ground Water Depth and Gradient The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground water depth and elevation maps were reviewed to determine the ground water levels near the Site. The Fall 1998 and Spring 1999 maps are the most current official maps available from the County. According to these maps (Plates 3-6), ground water lies between 70 and 90 feet below ground surface and flows at a gradient of about 10 feet per mile to the northwest in the vicinity of the Site. No ground water was encountered by the staff of Neil O.Anderson 8t Associates, Inc. during the drilling of 13 percolation test holes to a depth of 25 feet on March 30i 2005,April.11, 2005 and April 21, 2005. Fk 4 ! J