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5 <br /> C i <br /> GEOTECHNICAL <br /> _ 'NEIL O. ANDLRSON I ENVIRONMENTAL <br /> j4fA 'N D ASSOC IATtsINSPECTIONS a TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> 111 POST TENSION 'DESIGN <br /> January 3, 2006 <br /> F1 NOA Project Number: E05164A <br /> PART II: NITRATE LOADING STUDY <br /> ri <br /> KHANSHALI PROPERTY <br /> FJ 9542 SOUTH AIRPORT WAY <br /> STOCKTON, CALIFORNIA <br /> F1 <br /> SJC APPLICATION NUMBER: 05-420 SA(PRE-APPLICATION) <br /> F1 INTRODUCTION <br /> Our office was contracted by Mr. Yasir Khanshali of Modesto, California to conduct a Nitrate <br /> Loading Study (NLS) for the property at 9542 South Airport Way,Manteca,California. Please refer <br /> to the relevant sections of the attached Soil Suitability Study (SSS) for introductory project details. <br /> To expedite San Joaquin County.Environmental Health Department (EHD) review, the <br /> F1i 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 14,2043. <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 /> concentration of percolating effluent and rain fall over the long term. Where percolating effluent <br /> riTeaches into the ground,ground water quality may be impacted to some degree should the effluent <br /> reach ground water. <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 /> and simplified method to estimate long-term ground-water nitrate impacts on an area-wide basis. <br /> Hantzsche and Flnnemore 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 Dater, Hantzsche <br /> 3 LODI ■ SACRAMENTO 0 MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 0 209.367.3701 0 209.369.4228 0 www.noanderson.com <br />