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Fit <br /> C w — - <br /> _ j GEOTECHN]C.AL <br /> -- NGIL::o. ANDGRS <br /> DER <br /> O�' I -ENVIRONMENTAL <br /> - A N D A 'S S O-C .I_A T`E S - <br /> IN.5PECTIONS: NESTING <br /> LABORATORY SER- <br /> VICES. <br /> 1F <br /> POOL ENGINEERING <br /> [ POST TENSION "DESIGN <br /> June 27, 2005 <br /> NOA Project Number:-E05087A <br /> PART II: NITRATE LOADING STUDY._. <br /> DIEDE CONSTRUCTION PROPERTY_ <br /> 12400 NORTH HIGHWAY 99 <br /> 'LODI, CALIFORNIA <br /> SJC APPLICATION;NUMBER:`PA-05-368 <br /> i1 <br /> ii 1.0 INTRODUCTION <br /> I Our office was contracted by Mr. Dave Lagorao of Diede Construction to conduct a Nitrate <br /> Loading Study (NLS) for the property at 12400 North.Highway 99.7 Lodi, California. Please refer to <br /> I{ 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 /> FiBecause 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 (199-2).-which provides a convenient <br /> n and simplified method to estimate long-term ground-water nitrate impacts on an area-wide basis. <br /> 1 Hantzsche and Finnemore found that over a long period of time,water duality in the upper <br /> w 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 withsome-real limitations. In their article published in Ground Water, Hantzsche <br /> 1 <br /> k <br /> LODI ■ SACRAMENTO ■ MODESTO ■ RENO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,I..odi,California 95240 ■209.367.3701 0 209.369.4228fax W www.noanderson.eom <br />