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Hogan Residence Page 3 According to the ground water maps reviewed by CTE for the area, the depth to first ground water is approximately 25 feet below the surface. Although the regional direction of groundwater flow appears to be to the west, southwest toward the San Joaquin River, seasonal fluctuations and the pumping of wells in the area may produce local variations. The actual direction of ground water flow is difficult to determine without site specific data. In conversations with the San Joaquin County Planning Department regarding flood hazard classification, this parcel is located in Flood Zone C. Flood Zone C is out of the 100 and 500 year flood plain. The potential for flooding of the subject site is considered low. Soils According to information obtained from the USDA Soil Conservation Service for San Joaquin County , soils in the area of the subject site are classified as Delhi Loamy sand (DH) . Delhi soils are characteristically grey brown sandy, well drained soils with rapid permeability. Its ability to hold water is low. Most areas of this unit are used for cropland, orchards, and vineyards. A few areas are used for homesite development. A copy of the USDA description is presented in Appendix A. Additionally, two test pits, each 10 feet in depth, were excavated near the proposed homesite on the 5 acre parcel and one in the vicinity of the future homesite on the remaining 20 acre parcel. Soil encountered in both test pits were found to consist of brown silty sand (SM) from the ground surface to a depth of 3 feet. From three feet below existing ground surface to a depth of 10 feet the soil profile consists of = a brown , medium-grained poorly graded sand with silt (SP-SM) . Well drilling logs reviewed for the water wells on the site and in the vicinity indicate that the overlying sand layer varies in thickness from 17 to 30 feet. Soil moisture contents in soil samples taken from test pits 1 and 2 are 5.4 and 5.3 respectively. The percent passing the 200 sieve is 7 and 7.5 percent respectively. Topography y The regional topography of the area slopes approximately 0-2$ toward the west, and is characteristic of the alluvial fans and floodplains which comprise this section of the valley. The topography of the site is level with an average elevation of _ approximately 55' above sea level.