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L `J <br /> LDecember 6, 2004 <br /> NOA Project Number: E040130A <br /> L1/3.6 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 November 2, 2004: <br /> Table 2. <br /> / <br /> Vicinity Septic System Repair Permit S mmary. <br /> !� Address,Date Tank Lines,Length,Pits Comments <br /> Capacity <br /> im 17200 Liberty Road,12/2/99 Not reported Not reported Destruction of tank <br /> 17200 East Liberty Road, Not reported Not reported Destruction of tank <br /> L01/02/01 <br /> 17700 East Liberty Road 1200 gal Not reported Addition of one 40-ft leach line and <br /> L5/15/96 one 33-in diameter by 25-ft deep pit <br /> 17777 East Liberty Road Not reported Not reported Addition of one 40- <br /> ft leach line and <br /> 12/8/94 one 42-in diameter by 25-ft dee it <br /> L ✓Two of the repair permits involved the destruction of septic tanks.The other two repair permits <br /> involved the addition of 40 foot leach lines. <br /> L /3.7 Expected On-Site Maximum Septic Tank Usage <br /> L Maximum expected usage on each proposed parcel would be for a primary residence and second <br /> dwelling unit. Septic system design should be based on the On-Site Wastewater Disposal Standards or <br /> other engineering recommendations. <br /> V 4.0 GROUND WATER INFORMATION <br /> /4.1 Ground Water Depth and Gradient <br /> L <br /> The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> L 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 160 and 180 feet below ground <br /> surface and flows at a gradient of 5 to 10 feet per mile to west in the vicinity of the Site. <br /> No ground water was encountered by the staff of Neil O.Anderson&Associates, Inc. during the <br /> L drilling of the percolation test holes to a depth of 25 feet on November 17, 2004 and November 19, <br /> 2004. <br /> ` <br /> ` 4 <br /> L '404 <br /> L <br />