SU0008377 SSNL - Laserfiche WebLink

Home Browse Search

utilize leach lines and seepage pits or sumps. 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 two residences and any future residential uses. No construction is planned. Septic system design should be based on the On-Site Wastewater Disposal Standards (2003) or other engineering recommendations. 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 spring and fall of 2009 were the ost�recent available from this source. o an analysis of these maps lates 5 and 6 ;. ground water elevation 5 to 45 feet above mean sea level; grog t�d water fl own to the northwest at a r to of approxim tely 8 to 12 feet per mile in the vicinity of the Site. �--- Given that the ground elevation of the Site is approximate"ly 135 to 165 feet, the depth to water below the Site is estimated to range be v een 90 to 130 feet. Potential Ground Water Contamination Issues The Soil Suitability Study is of i ended to be an investigation into ground-water contamination sources, a no such i estigation was conducted. Many sources can contribute to ground wat co ation, including leaking underground storage tanks, agricultural activities, dairies, 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. Confined animal facilities, such as the one on the Site, can lead to elevated levels of nitrates and other constituents in soil and groundwater. This facility is being managed under the oversight of the Central Valley Regional Water Quality Control Board. Live Oak reviewed the END's Water Well Data Table dated March 10, 2009 for nearby addresses that have been tested for nitrate and dibromoch� , common ground water contaminants in San Jaa ounty. wo n ar y ►xe id a esses located within approxim e!y one uarter mile of it was detect d in ne well at a concentration f 0.2 p s per billion (ppb); e other well. Nitrate as NO3 wa ed at concentrations '6.8 nd parts per million (ppm) within The Maximum Con ") t by the US EPA for DBCP i 0.2 ppb; th MCL for nitrate as N 3 is 45 p LOGE1030 Page 3