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GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> AND ASSOC IATES <br /> INSPECTIONS & TESTING <br /> ` LABORATORY SERVICES <br /> V POOL ENGINEERING <br /> Y` POST TENSION DESIGN <br /> LApril 9,2007 <br /> LNOA Project Number: E07045A <br /> L <br /> LNITRATE LOADING STUDY <br /> ST.JORGE WINERY <br /> L 151 WEST TADDEI ROAD <br /> L ACAMPO, CALIFORNIA <br /> SJC APPLICATION NUMBER: PA-05-306 <br /> L <br /> N INTRODUCTION <br /> L <br /> /Our office was contracted by Mr.Vern Vierra of Acampo to conduct a Nitrate Loading Study (NLS) <br /> V for the property at 151 West Taddei Road,Acampo, California. Please refer to the relevant sections <br /> of the attached Soil Suitability Study (SSS) for introductory project details. <br /> To expedite San Joaquin County Environmental Health Department (EHD) review,the <br /> ` formatting of this report has been designed to follow, to the greatest degree possible,the <br /> structure of the EHD's Nitrate Loading Study Requirements Checklist, dated July 14,2003. <br /> V t/Because of concern regarding nitrate leaching into ground water from septic systems, a nitrate <br /> loading analysis was required by the EHD for the proposed development to measure the potential <br /> concentration of percolating effluent and rain fall over the long term. Where percolating effluent <br /> rr leaches into the ground,ground water quality may be impacted to some degree should the effluent <br /> reach ground water. <br /> I <br /> The method utilized for the nitrate loading analysis is based on a simple mass balance formula, <br /> discussed in a published article by Hantzsche and Finnemore (1992),which provides a convenient <br /> L and simplified method to estimate long-term ground-water nitrate impacts on an area-wide basis. <br /> d <br /> Hantzsche and Finnemore found that over a long period of time,water quality in the upper <br /> I saturated ground-water zone closely approximates the quality of percolating recharge waters. They <br /> believe that their method is a good planning tool and provides useful information to planners and <br /> 6. local officials but with some real limitations. In their article published in Gmund Water,Hantzsche <br /> LLODI IN SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 IN 209.369.4228 IN w .noandersonxom <br /> L <br />