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GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> A N D A S S '0 C I A T E S INSPECTIONS a TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> June 13, 2006 <br /> i NOA Project Number: E05164A <br /> PART II: NITRATE LOADING STUDY <br /> i <br /> KHANSHALIPROPERTY <br /> Fla <br /> 9542 SOUTH AIRPORT WAY <br /> STOCKTON, CALIFORNIA <br /> SJC APPLICATION NUMBER: 05-420 SA (PRE-APPLICATION) <br /> II <br /> 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 Soil Suitability Study (SSS), dated January 3,2006 for introductory <br /> 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 /> F], 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 gtound-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 /> LODI ■ SACRAMENTO ■ WALNUT CREEK ■ RENO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 0 209.369.4228 fax ■www.noandcrson.com <br />