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+ Bird Road Facility Page 3 of 13 <br /> i Project Number: E07183A <br /> November 30, 2007 <br /> F1 <br /> I.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 <br /> reviewed a recent aerial photograph of the subject property available from GoogleEarth 7M. We <br /> counted the building clusters within one square mile of the Site, and made the assumption that l <br /> F1each building cluster has one septic system. Using this method, we determined that there are a <br /> minimum of approximately 30 septic systems per square mile in the immediate vicinity of the <br /> Site. <br /> F! Theg <br /> eneral area consists of agriculture with a few scattered residences. <br /> 9 <br /> F1 <br /> I.3.5 Septic Permit History in the Vicinity <br /> i <br /> According to a file review at EHD, the septic systems in the vicinity appear to utilize septic <br /> systems with leach lines. <br /> I.3.6 Septic Repair Permit History in the Vicinity <br /> According to a file review at EHD, the septic system repairs in the vicinity appear to be for the <br /> F, addition of leach lines. <br /> 1.3.7 Expected On-Site Maximum Se tic Tank Usage <br /> F1 According to John Wathen and a tentative site plan provided by Wong Engineering, Inc., <br /> maximum expected usage on the Site would be for the employees of the truck wash and heavy <br /> equipment repair shop. Four trailer spaces will also be available for employees to occasionally <br /> stay overnight. The existing residence on the property will be demolished and a new three- <br /> bedroom residence will be constructed in its place. Septic system design should be based on the <br /> On-Site Wastewater Disposal Standards or other engineering recommendations. Please see <br /> section II.3.4.1 of the Nitrate Loading Study for further details regarding waste water flow from <br /> the proposed project. <br /> I.4 Ground Water Information <br /> I.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 <br /> "j Site. The Fall 1998 and Spring 1999 maps are the most current maps available from the <br /> 1 county. <br /> F1Examination of these maps indicates tha naw er level data is available for the Tracy/Banta <br /> 1 area, which includes the Site, and no de comments as to depth or gradient flow <br /> can be made. A groundwater boring was drilled ce the purpose of s w ter <br /> pond placement on March 8, 2007; ground wate was and to a at approximat ly 14.5 feet <br /> F1 bgs. <br /> 902 Industrial Way■Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02007 Nei!O.Anderson&Associates,Inc <br /> I <br />