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005-090-13 Roy White, 3810 East Barron Road <br /> Original septic system is 31 years old <br /> No problems with leach area <br /> Depth to ground water is 92 1 feet <br /> 005-O90-16 V. & G. Harrison <br /> 26854 North Nichols Road <br /> Septic system is 301 years old <br /> Tank was pumped three times in that time <br /> Depth to ground water is 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 90 feet and that the <br /> gradient falls easterly at approximately 8 feet per <br /> mile. See Exhibits 2 and 3 . <br /> F.G.L. Environmental analyzed the well water for DBCPs <br /> and nitrates February, 1995. The results of those <br /> tests are enclosed as Exhibits 5A through 5C. <br /> SOILS AND PERCOLATION TEST <br /> Per the "Soils of San Joaquin County" , as published by <br /> the University of California, the soil is San Joaquin <br /> Loam. <br /> Standard percolation tests were performed. See <br /> Exhibits 4A and 4B. <br /> CONCLUSION <br /> The percolation tests Parcel 1, Parcel 2 and the <br /> Remainder (test holes 1 , 4 , and 3 respectively) are <br /> believed to be deceptively good, and I have recommended <br /> leach areas larger than required by those test results . <br /> It is further recommended that all leach lines <br /> terminate in pits . <br /> Standard leach fields will not be adequate in this <br /> area, and it is recommended that leach lines terminate <br /> in seepage pits . A minimum of two pits are <br /> recommended. <br /> Based upon the percolation test and interviews , it is <br /> my professional opinion that a septic system will not <br /> adversely effect the first water aquifer. <br />