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L h April 9,2007 ` NOA Project Number: E07045A /3.6 Septic System Repair Permit History in the Vicinity r No septic system repair permits were found for the vicinity of the site during file review at EHD on LApril 3, 2007. 3.7 Expected On-Site Maximum Septic Tank Usage According to Vern Vierra,the septic tank usage for the subject property will be for the existing three bedroom residence and the one bedroom guest house.The shop also has a bathroom.The Ladditional usage from the proposed development will be for a small winery and tasting room. The L care taker quarters will also have a bathroom.The winery will have three employees during the peak of the season, and the tasting room will have 2 employees.The wine tasting room will be open on the weekends for the entire year, excluding the month of January and half of the month of February. System design should be based on the On-Site Wastewater Disposal Standards or other engineering recommendations. �4.0 GROUND WATER INFORMATION tr ,4.1 Ground Water Depth and Gradient The 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. The 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 20 and 30 feet below ground /surface and flows at a gradient of about 2 feet per mile to the north in the vicinity of the site. L �/ No ground water was encountered by the staff of Neil O. Anderson&Associates,Inc. during the drilling of a groundwater boring to a depth of 12 feet and one percolation test hole to a depth of approximately three feet on March 26,2007. ✓4.2 Potential Ground Water Contamination Issues L 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, G and storm water infiltration. Agricultural activities and the use of septic systems in the area should L /be considered potential ground-water contamination sources. ✓4.3 Water Sample Location One domestic well exists on the site. No well permits were found during file review at EHD on LApril 3, 2007 for the address 151 West Taddei Road,Acampo, California.A water sample was taken L 4 '-44