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GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> AN D ASSOCIATES <br /> "044 INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> Ir <br /> POST TENSION DESIGN <br /> December 1,2004 <br /> to NOA Project Number: E040117A <br /> PART H: REVISED NITRATE LOADING STUDY <br /> ` SJC APPLICATION NUMBERi� <br /> 22530 EAST LIBERTY ROAD <br /> CLEMENTS, CALIFORNIA <br /> INTRODUCTION <br /> Our office was contracted by Mr. Lowell Rathe of Clements to conduct a Nitrate Loading Study <br /> ` (NLS) for the property at 22530 East Liberty Road, Clements, 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 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 <br /> effluent reach ground water. <br /> r. <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 /> LODI IN SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,Caliifomia 95240 ■209.367.3701 ■ 209.369.4228 ■w .noandersonxom <br /> L <br />