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GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> L "44 A N D A S S O C I A T E S INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> L June 12, 2006 <br /> NOA Project Number: E06061A <br /> L <br /> LPART II: NITRATE LOADING STUDY <br /> BLUE OAK CELLARS <br /> L 10112 EAST WOODBRIDGE ROAD <br /> ACAMPO, CALIFORNIA <br /> SJC APPLICATION NUMBER: PA-06-33 (SA) <br /> 1. <br /> L /INTRODUCTION <br /> Our office was contracted by Tom Hoffman of Blue Oak Cellars to conduct a nitrate loading study <br /> for the property at 10112 East Woodbridge Road,Acampo, California. Please refer to the relevant <br /> L 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 Check st, dated July 14, 2003. <br /> L /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 /> 6. leaches into the ground,ground water quality may be impacted to some degree should the effluent <br /> /The <br /> ground water. <br /> ✓ <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 /> 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 /> L 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 /> LODI ■ SACRAMENTO ■WALNUT CREEK ■ RENO ■ MODESTO <br /> V <br /> ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,Califomia 95240 ■209.367.3701 0 209.369.4228 fax ■w .noander onxc <br />