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Mencarini Property Page 3 of 14 Our Project Number: LGS080538 August 26, 2008 1.3.4 Existinci Septic Tank Usage in the Vicinity i In an attempt to determine the septic system density for the vicinity of the Site, our office reviewed a recent aerial photograph of the subject property available from GoogleEarthT'". We counted the building clusters within one square mile of the Site, and made the assumption that each building cluster has one septic system. Using this method, we determined that there are a minimum of 20 septic systems per square mile in the immediate vicinity of the Site. The general area consists of agriculture with a few scattered residences. 1x:3.5 Septic Permit HistoU in the Vicinity Based on a recent file review at EHD, the septic systems in the area appear to utilize leach lines I with seepage pits. The septic permits can be found in the back of this report. i 1.�6 Septic Repair Permit History in the Vicinity Based on a recent file review at the EHD, the septic repairs in the vicinity appear to be for the addition of leach lines and seepage pits. The septic repair permits can be found in the back of this report. I 1. .7 Expected On-Site Maximum Septic Tank Usage Maximum expected usage on the parcel would be for a wine tasting facility. The wine tasting room is expected to have four (4) employees working six (6) days a week normal business hours, 8:00 to 5:00 pm. The facility is hoping to serve approximately 8 to 10 customers per { day. The tasting room will also have approximately four (4) marketing events per year with an average of 40 to 50 guests attending each event. The septic system design for the wine tasting facility should accommodate the peak flows of these marketing events. Septic system design should be based on the On-Site Wastewater Disposal Standards or other engineering recommendations. ,4 Groundwater Information 1.4.1 Groundwater Depth and Gradient The San Joaquin County Flood Control and Water Conservation District (2003 and 2004) groundwater elevation maps were reviewed to determine the groundwater levels near the Site. The Fall 2003 and Spring 2004 maps are the most current official maps available from the County. According to these maps, (Plates 3 and 4) groundwater elevation lies between 0 and 10 feet below mean sea level. The elevation of the land, as previously mentioned in Section 1.1, ranges between approximately 30 and 35 feet above mean sea level. Therefore, the depth to groundwater (the difference between the elevation of the Site and the elevation of groundwater), ranges between r 902 Industrial Way•Lodi,CA 95240.209.367.3701 •Fax 209.369.4228 02008 Neil O.Anderson&Associates,Inc