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007-240-16 Donald Frasier, 12653 East Jahant Road <br /> Septic system is 30 years old <br /> Renewed leach lines and put in dry wells <br /> this year <br /> Depth to ground water unknown <br /> GROUND WATER <br /> From the San Joaquin County Flood Control and Water <br /> Conservation District Study we find that the ground <br /> water depth is approximately 140 feet and that the <br /> gradient falls southerly at approximately 10 feet per <br /> mile. See Exhibits 2 and 3 . <br /> SOILS AND PERCOLATION TEST <br /> Per the "Soils of San Joaquin , County" , as published by <br /> the University of California, the soil is Ramona Sandy <br /> Loam. <br /> On June 22nd, under Health Department permit, standard <br /> percolation tests were run on the site. Parcel 4, <br /> apparently a different soil type percolated well. The <br /> remaining parcels failed and deep percolation tests <br /> were subsequently run by Anderson and Associates. All <br /> tests are shown in the Appendix. <br /> WATER QUALITY <br /> The owner had EGL Laboratories test the ground water <br /> for DBCPs and nitrates. The results are attached as <br /> Exhibits 4 through 8 . <br /> CONCLUSION AND RECOMMENDATION <br /> Based upon the results of percolation tests , interviews <br /> and other data, it is my opinion that septic systems <br /> can be constructed on this property that should not <br /> degrade the existing water table at the density shown. <br /> Prior to the construction of septic systems on Parcels <br /> 1, 2 and 3 , site specific teats should be done. At <br /> that time it should be determined for each site if a <br /> leach bed should be constructed or pits . If pits are <br /> constructed their sides should be sealed to a depth 5 <br /> feet deeper than the perched water. <br /> Twelve thousand square feet should be reserved on each <br /> parcel for leach area. <br /> 2 <br />