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A copy of the Soils Classification Map prepared by the U.S. Department of <br /> Ag Soil Conservation Service is included in the Appendix. Their map classified the <br /> soils as clay loam. Due to this classification, there should be no potential problems <br /> or special engineering required on future septic systems. <br /> Three percolation tests were performed in holes 10 inches in diameter by 42 <br /> inches deep backfilled with 2 inches of gravel. The three holes were filled with <br /> water 24 hours prior to running the test. On October 31, 2003 (at 8:00 a.m.) the <br /> 24 hour pre-soak time was completed and the test commenced. All of the hole <br /> conditions after 24 hours was typical for the type of soil lithology in the general <br /> area. The holes contained no water after 24 hours, and there was soil <br /> sedimentation at the bottom. The holes were filled with approximately 6 inches of <br /> water at the commencement of tests. The test holes for all parcels were performed <br /> under a 4 hour test. The last half hour of the test readings for all parcels were <br /> witnessed by a County Health Official and the test data obtained is enclosed in the <br /> Appendix. <br /> Parcel Number Percolation Rate <br /> 1 13.16 min./in. <br /> 2 8.92 min./in. <br /> 3 25.00 min./in. <br /> VII. GROUNDWATER <br /> A Groundwater test was performed on Parcel 1 well, which is adjacent to <br /> Parcel 2 and 3. (A.P.N. 091 -070-05). The well was tested for nitrates and DBCP. <br /> The samples were taken by Ed Krager of Dillon & Murphy and driven directly to <br /> Precision Enviro-Tech. Water was taken from a spigot at the house/office. The <br /> results from the tests can be found in the Appendix. The results did not yield any <br /> reason for concern regarding ground water in the area. <br /> VIII. CONCLUSION <br /> Based on the results of the percolation test, and the soil profile, it is Dillon & <br /> Murphy's opinion that the three parcels tested are suitable for onsite sewage <br /> disposal systems. Any system proposed for any of the three subject parcels should <br /> be designed fand installed base don the most current San Joaquin County criteria. <br /> Based on the depth to ground water in the area, and the size of the proposed <br /> parcels, it is our opinion that the installation of any new proposed septic systems, if <br /> properly installed, should not adversely affect the quality of ground water in the <br /> area. <br /> 3 <br /> C:\9902\ SOILS REPORT 110303 <br />