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FARMINGTON EQUITY PARTNERS PROPERTY <br /> Page No. 3 <br /> determine the soil profile in the general area. For approximate <br /> location of the test holes (PT) see the Parcel Map in the Appendix. <br /> After the initial shallow percolation tests failed, the percolation <br /> test holes were deepened to 8 feet and 17 feet. The soil profile <br /> and percolation test holes were logged by an engineer and a <br /> description of the soils encountered in each hole is contained in <br /> the Appendix. Generally the surface soils were fairly tight silts <br /> and clays. A silty sand stratum was encountered at a depth of 7.5 <br /> feet in test hole 1 and 15 .5 feet in test hole 2 . Percolation <br /> tests were performed in these sand strata. For a more detailed <br /> description of the soils encountered see the log of test pits. <br /> Deep pit percolation tests were performed at each of the test <br /> hole locations. As indicated, shallow percolation tests (36 inches <br /> deep) were first performed and due to their failure, the deeper <br /> tests were ran. Four inch diameter holes were drilled for the <br /> deeper tests. Two inches of gravel was placed in the bottom of <br /> each hole. A 2 inch diameter perforated pipe was then placed in <br /> each hole and backfilled with gravel. Each of the tests holes were <br /> filled with water 24 hours prior to running the tests. The last <br /> half hour of the tests readings were witnessed by a county health <br /> official and the test data obtained is enclosed in the appendix. <br /> The percolation rates have been adjusted to account for the gravel <br /> and pipe backfill. Calculations for adjustments are on the test <br /> data sheets. <br /> A summary of the test results is presented next: <br /> Diameter of Depth of <br /> Test No. Hole (in. ) _ Hole (in. )— Percolation Rate (min/in) <br /> PT-1 4 96 <br /> PT-2 4 204 <br /> VII CONCLUSION <br /> Based on the results of the percolation tests, the soil <br /> profile, and the performance of the septic systems in the area, it <br /> is our opinion that the existing and proposed homesites resulting <br /> from the proposed parcel split should be suitable for use of on <br /> site sewage disposal system. Recommended systems should include <br /> both shallow leach lines and dry wells. Any proposed systems <br /> should be properly designed and installed according to current San <br /> Joaquin County criteria. <br /> ?pERSO <br /> P N <br /> s <br /> '� W <br /> Q � <br /> 9SSp G♦ <br /> P <br />