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r.` C) In <br /> i GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> A N D A S S O C A T E $ INSPECTIONS a TESTING <br /> LABORATORY SERVICES <br /> I <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> October 29, 2007 /0 <br /> NOA Job No: E07146A ���� <br /> Ms. Lisa Medina <br /> Environmental Health Department pF'��L1 �Fy OZ00.600 E. Main O <br /> Stockton, CA 95202 S�9p��Fs�ry <br /> Subject: UPDATE LETTER FOR SOIL SUITABILITY/NITRATE <br /> LOADING STUDY (SSS/NLS) <br /> Macchia Winery <br /> 7099 E. Peltier Road <br /> Acampo, California <br /> Dear Ms. Medina, <br /> This update letter was drafted in an effort to clarify the clerical errors found in our <br /> firm's original SSS/NLS, dated September 30, 2007. As noted by you, an error was <br /> discovered on page 3, within the last paragraph of section 4.2 Contribution of Rainfall. <br /> The appropriate corrections have been made to both the report text and any <br /> subsequent calculations. Below you will find the corrected section and attached are <br /> copies of the corrected calculation worksheets (an annual precipitation worksheet, Plate <br /> 9 and a nitrate loading calculation worksheet, Plate 10). <br /> 4.2 Contribution of Rainfall <br /> An estimate of the quantity and quality of rainfall was required for the nitrate loading <br /> analysis. The estimate of deep percolation of rain is based on the average monthly <br /> precipitation of rainfall and evapotranspiration for Lodi, California. An estimate of <br /> potential deep percolation of rain water recharge into the ground is required for the <br /> nitrate loading calculation. <br /> Since the site had rapid percolation rates, we will make the assumption that nearly all <br /> rainfall will infiltrate the ground fairly rapidly. Therefore, we estimate that roughly 80 <br /> percent of the rain fall will enter the ground water as recharge. The 20 percent <br /> reduction is to allow for some evaporation and transpiration of plants. Runoff is not <br /> expected. This method is not appropriate for sites which have relatively low infiltration <br /> rates. <br /> ANGELS CAMP • LODI MODESTO • RENO • SACRAMENTO • WALNUT CREEK <br /> LODI 902 Industrial Way Lodi,CA 95240 • 209.367.3701 • FAX 209-369.4228 • www.noanderson.com <br />