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I GEOTECHNiCAL <br /> NEIL O. ANDERSON f ENVIRONMENTAL <br /> AND ASSOC i ATE 5 INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> j POST TENSION DESIGN <br /> March 3, 2005 <br /> NOA Project Number: E040155A <br />` PART II: NITRATE LOADING STUDY <br /> SJC APPLICATION NUMBER: PA-03-638 <br /> TANKERSLEY PROPERTY <br /> 16100 EAST HARNEY LANE <br /> LODI, CALIFORNIA <br /> I TRODUCTION <br /> - -- <br /> Our office was contracted by Mr. Keith Tankersley of Lodi to conduct a Nitrate Loading Study <br /> (NLS) for the property at 16100 East Harney Lane,Lodi, California. Please refer to the relevant <br /> 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 /> 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 /> 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 /> 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 /> 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 /> i <br /> 2 <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California-95240 ■209.367.3701 ■ 209.369.4228 N www.noanderson.com <br />