Laserfiche WebLink
L March 28,2005 <br /> NOA Project Number: E05027A <br /> _ Table 2. <br /> Vicinity Septic System Repair Permit Summary. <br /> Address,Date Tank Lines,Length, Pits Comments <br /> ` Capacity <br /> 13280 North Jack Tone Road, Not reported One 80 leach line and Repair/ addition of system <br /> 4/29/85 one 33 inch by 25 foot pit <br /> 13290 North jack Tone Road Not reported Two seepage pit 36 inch Repair/ addition of system <br /> 4/29/91 diameter by 25 feet dee <br /> The repair permits found during the file review are mostly for the addition or repair of leach lines <br /> and pits. <br /> L 3.7 Expected On-Site Maximum Septic Tank Usage \1' <br /> Maximum expected usage on each proposed parcel would potentially be for a primary residence and <br /> second dwelling unit. Septic system design should be based on the On-Site Wastewater Disposal <br /> Standards or other engineering recommendations. <br /> 4.0 GROUND WATER INFORMATION <br /> L 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 traps 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 110 and 120 feet below ground <br /> surface and flows at a gradient of about 10 feet per mile to the northwest in the vicinity of the Site. <br /> A—Perched water was encountered at 10 feet by the staff of Neil O.Anderson&Associates,Inc. <br /> during the drilling of the percolation test holes to a death gf 25 fee on Fe tagJ.1, 2005.W.e <br /> believe-the_sourcem,of the perched water was froinfiltrating rain water collecting on the hard pan <br /> surface. This water will typically percolate trough this_2one after the xajt}y ceacon. <br /> / 4.2 Potential Ground Water Contamination Issues <br /> Identifying potential ground-water contamination sources was not part of the scope of work for the <br /> soil suitability study. Potential ground-water contamination can occur from a number of sources <br /> which often include leaky underground storage tanks,agricultural activities, dairies, septic systems, <br /> and storm water infiltration. Any past agricultural activities and the present use of septic systems in <br /> the area should be considered potential ground-water contamination sources for the area <br /> L <br /> i 5 <br /> '044 <br /> L <br />