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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 & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> NITRATE LOADING STUDY <br /> SPANOS PROPERTY <br /> 17436 NORTH HIGHWAY 88 <br /> LOCKEFORD, CALIFORNIA <br /> OUR PROJECT NUMBER: LGS090501 <br /> T INTRODUCTION <br /> V Our office was contracted by Mr. Nick Spanos to conduct a Nitrate Loading Study (NLS) for the <br /> property at 17436 North Highway 88, Lockeford, California. We understand a Soil Suitability <br /> Study (SSS) was prepared by Dillion and Murphy Engineers, Lodi, California, dated December <br /> 2008, Project no. 0857; please refer to that report for project.details as specified. Based on this <br /> report, it appears as though the owner is applying for a Zone Reclassification (ZR) on 17.1 acres <br /> of the property. If the rezone Reclassification is granted, the owner would propose to develop <br /> the parcel as a Commercial building site. The site would include 53,000 square feet of <br /> commercial/retail area, 18,000 square feet of hotel and 3,000 square feet of gas station. <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 <br /> potential concentration of percolating effluent' and rain fall over the "long term. Where <br /> percolating effluent-leaches into the ground, ground water quality may be impacted to some <br /> degree should the effluent 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 <br /> convenient and simplified method to estimate long-term ground-water nitrate impacts on an <br /> 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. <br /> They believe that their method is a good planning tool and provides useful information to <br /> planners and local officials but with some real limitations. In their article published in Ground <br /> Water, Hantzsche and Finnemore mention that "...the equation ignores dispersion, lateral flow, <br /> and mixing with ground water flow from up-gradient.areas. <br /> ANGELS CAMP * LO,DI ■ MODESTO RENO ■ SACRAMENTO ■ WALNUT CREEK <br /> L 0 D 1 902.Industrial Way - Lodi,CA 95240 209.3 67.3 701 - FAX 209-369-4228 ■ www.noanderson,com <br />