SR0080576 SSNL - Laserfiche WebLink

Home Browse Search

• March 2001 permit for new 85' leach line and 36"-diameter by 25'-deep seepage pit to replace line at location of new pool. • April 2014 permit for a new septic system at the church. The system utilizes a 1,200-gallon tank and a 100' leach line. These permits are included in Appendix 4. Existing Septic Tank Usage in the Vicinity To estimate the septic system usage in the area, our office counted septic systems that exist within approximately one square mile surrounding the property. Air photo imagery from GoogleEarthTM was used. Each building cluster on the photo was assumed to have one septic system. Using this method, we estimated that at least 37 septic systems per square mile are located in the immediate vicinity of the Site. The general area consists of rural residences, vineyards, and other agricultural land. 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, septic systems in the area appear to utilize leach lines, leach lines with sumps, leach lines with seepage pits, and filter beds. 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 house and church. 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 2016 were the most recent available�� from this source. According to an analysis of these maps (Plates 5 and 6), ground— water roundwater elevation is approximately 30 feet below mean sea level; ground water flows toward the southeast or east at a rate of approximately 4.5 to 10 feet per mile in the vicinity of the Site. Given that the ground elevation of the Site is 17 to 19 feet, the depth to water below the Site is estimated to be 47 to 49 feet. LOGE 1917 Page 3