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t Septic systems in the general area seem to have good functionality and no 4 permits for repair are noted. (See Appendix). No future development on any of the subject parcels has been anticipated. At the time that development does occur, it is recommended that a standard system will suffice due to the soil lithology and percolation rates in this area. Septic permit applications have been researched and attached to the appendix of this report. All applications are for properties within one mile of the subject parcels. Predominantly, the septic systems consists of septic tanks, leach lines, and pits. Engineered systems have not been required in this area. Each parcel that is being created would be allowed to have two homes built on them by today's zoning ordinance. V. GROUND WATER AND DEPTH TESTING According to the map of "Lines of Equal Depth of Water Wells" published Fall, 1999, by the San Joaquin County Flood Control and Water Conservation District, the depth to groundwater at this location is approximately 110 feet. The gradient of ground water in the project area slopes east to west according to the map of lines of equal elevation published in the spring of 1999 by San Joaquin County Flood Control and Water Conservation District. (See Appendix). Water samples were taken from the well shown on the tentative map and analyzed for nitrates and DBCP. Samples were taken by Ed Krager of Dillon & Murphy the same day the percolation tests were performed. The samples were taken using the criteria of Precision Enviro-Tech. The samples were transported via automobile to Precision Enviro-Tech and released to them (see chain of custody in Appendix). The nitrates were measured at 2.61 mg/I. The DBCP was measured as non-detect. (See Appendix for results.) Areas of potential concern for ground water contamination consist of onsite storage for ag-chemicals and fuel containers. However, based on water testing, potential for contamination is very low. VI. SOIL PROFILE AND PERCOLATION TESTS Three test holes were excavated to a depth of 3.5 feet in the area of potential homesites. The holes were dug and prepared on October 30, 2003. The purpose of the test holes were to determine percolation rate in these areas. For approximate location of the test holes, see the Tentative Parcel Map in the Appendix. The holes were prepared in accordance with County Standards. Soils lithology in the general area of the test holes consisted of clay/loam. As shallow percolation tests proved adequate for conventional septic systems, no further soil exploration was necessary. 2 C:\9902\ SOILS REPORT 110303