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� � J <br /> ` September 10, 2004 <br /> NOA Project Number: E040104A <br /> 3.6 Septic Repair Permit History in the Vicinity <br /> v The following septic system repair permits were found for the vicinity of the Site during file <br /> review at EHD on September 1, 2004: <br /> Table 3. <br /> Vicinity Septic System Repair Permit Summary. <br /> Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> 13665 S.Jack Tone,7-6-70 1,200 gal Not reported Replacement of tank,addition <br /> of one 40-ft leach line,one 48- <br /> in diameter by 15-ft drain pit <br /> to existing residential unit. <br /> 13918 Jack Tone, 7-13-99 1,500 gal Three 80-ft leach lines Repair to existing residential <br /> unit. <br /> 3.7 Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage would be for a primary residence and second dwelling unit. Septic <br /> system design should be based on the On-Site Wastewater Disposal Standards or other <br /> 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) <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 between 40 and 50 <br /> feet below ground surface and flows at a gradient of approximately 10 feet per mile to the <br /> ` north-northeast in the vicinity of the Site. <br /> ` No ground water was encountered by the staff of Neil O. Anderson & Associates, Inc. during <br /> the drilling of six percolation test holes to a depth of 25 feet on August 27, 2004. <br /> V <br /> 5 I <br />