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{ <br /> I <br /> t_± <br /> GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br />{ �I <br /> AN D ASSOCIATES INSPECTIONS s TESTING <br /> LABORATORY SERVICES <br />! l <br /> e � POOL ENGINEERING <br /> POST TENSION DESIGN <br /> RFebruary 28, 2007 <br /> NOA Project Number: E07023A <br /> PART II:NITRATE LOADING STUDY <br /> SJC APPLICATION NUMBER PA-06-651 <br /> 8853 SOUTH MANTHEY ROAD <br /> FRENCH CAMP, CALIFORNIA <br /> INTRODUCTION <br /> Our office was contracted by Dave Silva Trucking of French Camp to conduct a Nitrate Loading <br /> Study (NLS) for the property at 8853 South Manthey Road, French Camp, California. Please refer <br /> to the relevant sections of the attached Soil Suitability Study (SSS) for introductory project details. <br /> F1To 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 Checkbst, dated July 14, 2003. <br /> Because of concern regarding nitrate leaching into ground water from septic systems, a nitrate <br /> FI 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 /> leaches 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 Finnemore found that over a long period of time,water quality in the upper <br /> F! 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 Water, Hantzsche <br /> _- and Finnemore mention that the equation ignores dispersion,lateral flow, and mixing with <br /> r7 <br /> 1I <br /> F-112 <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> Fill ENVIRONMENTAL DIVISION 902 Industria]Way,Lodi,California 95240 ■209.367.3701 ■ 209.369.4228 ■www.noanderson.com <br />