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31 May 2007 AGE-NC-07-1528 Page 3 of 5 The immediately adjacent land use for the parcel is residential housing.The outlying land use in the vicinity ofthe parcel are agricultural in nature.There are potential groundwater contamination issues associated with agricultural uses and septic systems. The San Joaquin County Flood Control and Water Conservation District's Lines ofEgual Depth to Ground Water Spring 1999 indicates the depth to ground water is 110 feet or less. Based upon a record review conducted at SJCEHD by an AGE representative DTW was indicated on well permits for the surrounding area to be between 75-feet and 110-feet bsg.Based upon review of ground water depth and gradient at this site,ground water depth ranges from 75 to 125 feet bsg and ground water typically flows between a northerly and westerly direction. 5.0. SOIL DESCRIPTIONS On 12 April 2007, AGE applied for and received an Onsite Wastewater Treatment System Permit from the SJCEHD(Appendix C). On 13 April 2007, a 4-inch hang auger was utilized to advance a test hole in the subject parcel.The test hole was located in an area where the proposed septic system is to be located.The test hole(TH-2)was advanced to a depth of 68-inches bsg.A site plan depicting proposed site features and location of test holes is included as Figure 2. The soil was visually described in accordance with the Unified Soil Classification System by a representative of AGE under the direct supervision of a California Professional Geologist. The soil sample collected from TH-2 consisted of soils ranging from silty sands to hard pan clays. Table 1 SOIL DESCRIPTION TH-2 Depth Interval (ft bsg) Soil Description =Soil Classification 0-5 dry,brown cla with sand CL 6.0. PERCOLATION TESTS On 02 May 2007,one boring was advanced(TH-1)for shallow percolation rate testing.The boring was advanced using a 4-inch hand auger. Boring TH-I was advanced to a depth of 42-inches. The borings were located more than 100 feet from the proposed well location and within 100 feet of the Advanced GeoEnvironmental,Inc.