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GEOTECHNICAL <br /> : ANDERSON ENVIRONMENTAL <br /> NEIL 4 <br /> A. N D. A S 5 O C I A T E S INSPECTIONS -a. TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DE-SIGN <br /> March 11, 2005 <br /> NOA Project Number: E040159A <br /> PART II: REVISED^NITRATE LOADING STUDY <br /> SJC APPLICATION NUMBER PA-04-288 <br /> F <br /> 13299 NORTH CURRY AVENUE <br /> F1 LODI, CALIFORNIA <br /> ri INTRODUCTION <br /> Our office was contracted by Mr. David Dart of D'ART Wine to conduct a Nitrate Loading Study <br /> F (NLS) for the property at 13299 North Curry Avenue,Lodi, California. Please refer to the relevant <br /> 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 Requitements 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 /> F1concentration 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-witer 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 W later, Hantzsche <br /> and Finnemore mention that "...the equation ignores dispersion,lateral flow, and mixing with <br /> 2 <br /> FjLO.DI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 M 209.369.4228 ■www.noandcrsonXom <br /> — ii <br />