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` ``r ../ <br /> v <br /> July 28,2006 <br /> j` NOA Project Number: E06068A <br /> PART II: NITRATE LOADING STUDY <br /> SJC APPLICATION NUMBER: UNASSIGNED <br /> 7087 EAST PELTIER ROAD <br /> ACAMPO, CALIFORNIA <br /> ` V/1.0 INTRODUCTION <br /> Our office was contracted by Mr. Dan Tabar of Nunhems USA, Inc. to conduct a Nitrate Loading <br /> ` Study (NLS) for the property at 7087 East Peltier Road,Acampo, California. Please refer to the <br /> 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 /> concentration of percolating effluent and rainfall 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 /> and Finnemore mention that "...the equation ignores dispersion,lateral flow, and mixing with <br /> 1 <br />