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NO <br /> 2 <br /> JR Page 7 <br /> Consulting, Inc. March 19, 2009 <br /> Environmental- Engineering• Geology Project Number 2009007 <br /> .General Area Septic Tank Repair History <br /> 3990 E. Woodbridge Road, system repaired in 1973 (added 160 feet of leach line) and <br /> 1977 (added one 25' deep seepage pit.). <br /> /Description Of Proposed Or Expected Maximum Septic Tank Usage On Site <br /> The maximum expected septic tank usage for the site will be from the two residential <br /> buildings and from the bouquet winery. Any future septic system design should be based on the <br /> On-Site Wastewater Disposal Standards or other engineering recommendations. <br /> 4. GROUNDWATER INFORMATION <br /> V <br /> Description Of The Depth And Gradient Of Groundwater In The Area <br /> The San Joaquin County Public Works Department Internal Groundwater Data Center <br /> (http://www.sjmap.org/groundwater� was reviewed. The spring 2008 and Fall 2007 maps are <br /> the most current maps available from the County. According to these maps (Plates A4&A5), <br /> ground water lies between 2 above and 5 feet below mean sea level (50 to 57 feet below the <br /> ground surface) and flows northeast at the gradient of 30 feet per mile in the vicinity of the site. <br /> No ground water was encountered during the drilling of the borehole to a depth of 25 feet <br /> below ground surface on March 12, 2009. <br /> Ground Water Contamination Issues in the Area <br /> Potential groundwater issues in the area consist of contamination from leaching of <br /> agricultural chemicals, winery waste water, fuel tank leakage, septic system usage and storm <br /> JR SQUARED CONSULTING,INC. ENVIRONMENTAL•ENGINEERING•GEOLOGY <br /> 6532 MCNEIL COURT,VALLEY SPRINGS,CA 95252 PHONE(209)772-3841•FAX(209)7404303 <br />