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March 22, 2004 <br /> NOA Project Number: LE03-392 <br /> Page 4 <br /> The permit search has shown that septic systems with leach lines with sumps have been used in <br /> the area. Some sites have a history of repairs. <br /> 3.6 Expected On-Site Maximum Septic Tank Usage <br /> aThe minor subdivision will contain a Designated Remainder parcel of 7.77 acres and one new <br /> Parcel 1 of 2.0 acres (Plate 1). The Designated Remainder presently contains a fairly new <br /> residence and septic system. It is possible that a legal second dwelling unit of less than two <br /> bedrooms and 1,500 square feet could be placed on either property in the future. With the use of <br /> a Second Dwelling unit, each parcel could contain a maximum of two septic systems. <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) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the <br /> Site. The Fall 1998 and Spring 1999 maps are the most current maps available from the county. <br /> According to these maps (Plates 2-5), ground water lies between 25 and 27 feet below ground <br /> surface in the vicinity of the Site and probably flows to the north-northeast; the ground water <br /> gradient at the site could not be determined. <br /> 4.2 On-Site Ground Water <br /> One domestic water well exists on the designated remainder parcel. No agricultural wells are <br /> known to exist on the property. <br /> No ground water was encountered by the staff of Neil O. Anderson &Associates, Inc. during <br /> drilling to a maximum depth of 3.0 feet. <br /> F14.3 Potential Ground Water Contamination Issues <br /> This soil suitabilAi r ort does not focus on identi 'n j2oteDtial ound-w co inatio <br /> sources. Ground-water contamination can occur from a number of sources which often include <br /> leaky underground storage tanks, agricultural activities, dairies, septic systems, storm water <br /> infiltration, etc. <br /> Agricultural activities and septic systems that exist on the property should be considered <br /> potential ground-water contamination sources. <br />