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Scannavino Property Page 3 of 9 Our Project Number: LGS080544 Date: November 11, 2008 3.5 Septic Permit History in the Vicinity Based on a recent file review at EHD, the septic systems in the area appear to utilize leach lines with seepage pits. The septic permits can be found at the end of this report. 3.6 Septic Repair Permit History in the Vicinity Based on a recent file review at the EHD, no septic repair perm were found in the vicinity. 3.7 Expected On-Site MaximumSeptlicTank Usage Maximum expected usage on the proposed parcel would be for a primary residence and second dwelling unit. Septic system design should be based on the On-Site Wastewater Disposal Standards or other engineering recommendations. 4.0 GROUNDWATER INFORMATION 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 Fall 2003 and Spring 2004 maps are the-most current official maps availatiom the /t-6-untF_A_ccDrding to these maps, (Plates 3 and 4} groundwater elevation lies betty en 30 and 50 feet below mean sea level. The elevation of the land, as previously mentioned i ction 1.1, ges between approximately 35 and 40 feet above mean sea level. Therefore, the depth o groundwater (the difference between the elevation of the Site and the elevation of groundwater), ranges between approximately 65 and 90 feet below the ground surface. The groundwater in the vicinity of the Site appears to flow to the east. No groundwater was encountered by the staff of Neil O. Anderson and Associates, Inc. during the drilling of any of the borings on October 29, 2008. 4.2 Potential Groundwater Contamination Issues Identifying potential groundwater contamination sources was not part of the scope of work for the soil suitability study. Potential groundwater contamination can occur from a number of sources which often include leaky underground storage tanks, agricultural activities, dairies, septic systems, and storm water infiltration. Agricultural activities and the use of septic systems in the area should be considered potential groundwater contamination sources. Z 3 Wa7dua le Location e domed one agricultural well exist on the site. One permit for the domestic well was found cent file review at EHD. A well water sample was taken on October 31, 2008 by Jessen Welch from the domestic well on the site. 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 02008 Neil O.Anderson&Associates,Inc