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L_l C) C <br /> GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> A N D A S S 0 C l A T E S <br /> I INSPECTIONS a TESTING <br /> LABORATORY SERVICES <br />' POOL ENGINEERING <br /> i f 1 POST TENSION DESIGN <br /> s November 30, 2007 <br /> NOA Project Number: E07188A <br /> PART II: NITRATE LOADING STUDY <br /> F!i <br /> SJC APPLICATION NUMBER PA-07-439 <br /> AD <br /> 8853 SOUTH MANTHEY ROAD <br /> F1, <br /> FRENCH CAMP, CALIFORNIA <br /> INTRODUCTION <br /> Our office was contracted by Dave Silva Trucking of French Camp to conduct a Nitrate Loading <br /> I Stud LS for the property at 8853 South Manthe Road French Cam California. Please refer <br /> 1 Y � ) p p tY Y � p� <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 /> 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 /> i <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 /> ri <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 Vater, Hantzsche <br /> F2I and Finnemore mention that."...the equation ignores dispersion,lateral flow, and mixing with <br /> F,, <br /> 2 <br /> � LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 industrial Way,Lodi,California 95240 ■209.367.3701 ■ 209.369.4228 ■www.noandersonxom <br /> r <br />