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ti <br /> GEOTECHNICAL <br /> NEIL O.. ANDERSON ENVIRONMENTAL . <br /> AND ASS0C "1-AT1S <br /> Fi 1NSPE_CT10 a TE'ST1NG <br /> LA80RAT0RY--SERVICES. <br /> POOL ENGINEERING <br /> POST TENSION: DESIGN <br /> April 29, 2005 <br /> NOA Project Number: E05040A <br /> k <br /> PART II REVISED NITRATE LOADING STUDY <br /> SJCAPPLICATIONNNUMBER PA-03-263 <br /> 14300 SOUTH CAMPBELL ROAD <br /> ESCALON,1"CALIFORNIA <br /> 1.0 INTRODUCTION <br /> i Our office was contracted by.Mr.Jim Kowalski of JJGS Corporation to conduct a Nitrate Loading <br /> Study (NLS) for the property at 14300 South Campbell Road, Escalon, California. Please refer to <br /> the relevant sections of the attached Soil Suitability Study (SSS) for introductory project details. <br /> FTo expedite San Joaquin CountyEnvironmental Health Department (E HD) 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 /> Tf <br /> 1 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 /> as concentration of percolating effluent and rainfall over the long term. Where percolating effluent <br /> leaches into the ground, ground water quality may be impacted to some degree should the effluent <br /> reach ground water. <br /> k <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 /> 1 ' and simplified method to estimate long-term ground-water-nitrate impacts on.an area-wide basis. <br /> Hantzsche`and Finnemore found that over a long period of time,water-quality in the upper <br /> 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 /> -local officials but with some real limitations. In their article published in Ground hater,Hantzsche <br /> and Fm' nemore mention that "...the equation ignores dispersion,lateral flow, and mixing with <br /> ri <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 0.209.367.3701 0 209.369.4228 ■www.noandersnnxom <br />