Laserfiche WebLink
May 2, 2007 <br /> NOA Project Number: E07040B <br /> 3.3 On-Site Septic Repair Permit History <br /> Please see section 3.1 for further details regarding septic repair history on the site. <br /> 3.4 Existing Septic Tank Usage in the Vicinity <br /> In an attempt to determine the septic system density for the vicinity of the Site, our office reviewed <br /> a 1993 aerial photograph of the subject property available from Google Maps TM. We counted the <br /> building clusters within one square mile of the Site, and made the assumption that each building <br /> cluster has one septic system. Using this method,we determined that there are a minimum of 100 <br /> septic systems per square mile in the immediate vicinity of the site. <br /> The general use of the vicinity is split between industrial and surrounding agricultural land with <br /> associated residences and farm structures. <br /> 3.5 Septic Permit History in the Vicinity <br /> After a file review at the EHD on February 15, 2007 it was determined that septic systems in the <br /> area appear to utilize leach lines with seepage pits. <br /> 3.6 Septic Repair Permit History in the Vicinity <br /> After a file review at the EHD on February 15, 2007 it was determined that septic system repairs in <br /> the area appear to have been primarily for the addition of leach lines and a seepage pits. <br /> 3.7 Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage on each proposed parcel would be for the existing building on Parcel one. <br /> The second parcel is a designated remainder. Septic system design should also be based on the On- <br /> Site Wastewater Disposal Standards or other engineering recommendations. <br /> 4.0 GROUND WATER INFORMATION <br /> 4.1 Ground Water Depth and Gradient <br /> The San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground <br /> water depth and elevation maps were reviewed to determine the ground water levels near the Site. <br /> The Fall 1998 and Spring 1999 maps are the most current official maps available from the county. <br /> According to these maps (Plates 3-6),ground water lies between 60 and 70 feet below ground <br /> surface in the vicinity of the Site. Due to the complex shape of the contours in the area,it is <br /> difficult to measure the gradient in the immediate vicinity of the site. <br /> 3 <br />