SU0010839 SSNL - Laserfiche WebLink

Home Browse Search

• The general area consists of agricultural land, vineyards, and orchards, with scattered agricultural buildings and rural residences. Septic Permit History in the Vicinity Based on a recent review of septic permits on file at the San Joaquin County Environmental Health Department for nearby properties, it appears that the septic systems in the area utilize leach lines. The septic permits can be found in Appendix 4 of this report. Expected On-Site Maximum Septic Tank Usage Maximum expected septic usage on the Site would be from the existing labor camp and a potential second dwelling unit on Parcel 1, the existing residence, office, restroom building, and a potential second dwelling unit on Parcel 2, and the four existing mobile homes and one house (owned by Union Island Mutual Water Company) on Parcel 3. No new construction is planned. Ground Water Information Depth and Gradient Live Oak reviewed ground-water elevation information available from the San Joaquin • County Flood Control and Water Conservation District to determine the ground water levels near the Site. Data from the fall of 2014 and spring of 2015 were the most recent available from this source. According to an analysis of these maps (Plates 7 and 8), the ground water elevation in the vicinity of the Site is close to mean sea level; the ground- water flow direction could not be determined. Given that the ground elevation of the Site is zero to four feet above sea level, based on the County ground water maps the depth to ground water below the Site is estimated to range between zero to four feet. Live Oak excavated a boring to first ground water at the time of the percolation testing; ground water was encountered at approximately seven feet below ground surface at each test location. Potential Ground Water Contamination Issues The Soil Suitability Study is not intended to be an investigation into ground-water contamination sources, and no such investigation was conducted. Many sources can contribute to ground water contamination, including leaking underground storage tanks, agricultural activities, dairies and cattle ranches, septic systems, and storm water infiltration. Agricultural activities and the use of septic systems in the area are known ground water contamination sources with the potential to impact the Site. • LOGE 1523 Page 3