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L LJuly 28,2006 NOA Project Number: E05167B LThe repair permit found in the vicinity was for the addition of a leach lines and a seepage pit. L3.7 Expected On-Site Maximum Septic Tank Usage One primary residence and a secondary dwelling will be the maximum expected septic tank usage L for Parcel 1 on the subject property. Septic system design should be based on the On-Site Wastewater Disposal Standards or other engineering recommendations. 4.0 GROUND WATER INFORMATION 4.1 Ground Water Depth and Gradient LThe San Joaquin County Flood Control and Water Conservation District (1998 and 1999) ground water depth and elevation maps were reviewed to determine the ground water levels near the Site. LThe Fall 1998 and Spring 1999 maps are the most current official maps available from the County. According to these maps (Plates 3-6),ground water lies between 90 and 110 feet below ground surface and flows at a gradient of about 10 feet per mile to the northeast in the vicinity of the Site. LNo ground water was encountered by the staff of Neil O. Anderson&Associates,Inc. during the drilling of a deep percolation test hole to a depth of approximately 20 feet on June 14,2006. 6. 4.2 Potential Ground Water Contamination Issues Identifying potential ground-water contamination sources was not part of the scope of work for the soil suitability study. Potential ground-water contamination can occur from a number of sources which often include leaky underground storage tanks,agricultural activities,dairies, septic systems L and storm water infiltration. Agricultural activities and the use of septic systems in the area should be considered potential ground-water contamination sources. L4.3 Water Sample Location One agricultural well and one domestic well exist on the site. Two permits were found for the site. L One permit was for the installation of the domestic well, and the other permit was for a pump repair on the agricultural well.The permits are included in the appendix of the report. A water sample was taken by Mr.Jessen Welch on June 12, 2006 from the spigot on the domestic well on Parcel 1. L4.4 Water Sample Constituents L The water sample was analyzed for nitrate and DBCP. Nitrate was found at 47.1 mg/L-N031 which is slightly above the maximum contaminant level (MCL) set by the US EPA of 45 mg/1'NO3. DBCP was not detected in the water sample. The analytical reports prepared by FGL LEnvironmental can be found in the appendix of this report L 4 '004