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L -- "' GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> L <br /> A N D A S S O C I A T E S INSPECTIONS a TESTING <br /> LABORATORY SERVICES <br /> LPOOL ENGINEERING <br /> POST TENSION DESIGN <br /> September 21,2005 <br /> NOA Project Number: E05104A <br /> L <br /> LPART II: NITRATE LOADING STUDY <br /> GRIFFITH PROPERTY <br /> L5801 FOPPIANO LANE <br /> LSTOCKTON, CALIFORNIA <br /> SJC APPLICATION NUMBER: PA-0400392 <br /> L <br /> LINTRODUCTION <br /> Our office was contracted by Stacey Griffith of Clements, California to conduct a Nitrate Loading <br /> Study (NLS) for the property at 5801 Foppiano Lane, Stockton,California. Please refer to the <br /> relevant sections of the attached Soil Suitability Study (SSS) for introductory project details. <br /> L 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 /> fr leaches into the ground,ground water quality may be impacted to some degree should the effluent <br /> reach ground water. <br /> LThe method utilized for the nitrate loading analysis is based on a supple mass balance formula, <br /> discussed in a published article by Hantzsche and Finnemore (1992),which provides a convenient <br /> Land 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 /> L LODI ■ SACRAMENTO ■ MODESTO <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 ■ 209.369.4228 ■w .noandersonxorn <br /> L <br />