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August 26,2002 <br /> Job Number:LG02-286 <br /> ` Page 10 <br /> little. In sands where there is very little clay, ammonium forms of can leach. Coarse-textured <br /> ` sands and some muck soils are the only soils where ammonium leaching may be significant. <br /> One way to minimize N leaching and denitrification is to minimize the time the N is in the soil <br /> before plant uptake. This cuts down on the time when conditions are favorable for losses.9 <br /> Joe Berghold indicated that the vineyard management with respect to soil fertilizers and <br /> .. irrigation is performed by Larry Mettler of Arbor Vineyards Farm Management. Mr. Mettler <br /> was contacted and indicated that petiole and soil samples are occasionally tested for nitrates and <br /> other nutrients on the Berghold vineyard. A site specific fertilizer and irrigation program has <br /> been developed for the Berghold vineyard by Larry Mettler. <br /> Mr. Mettler indicated that normally, about 20 units of nitrogen per acre in liquid form <br /> was applied to the 17 acres through the drip irrigation system. One unit of nitrogen is equivalent <br /> to one pound of nitrogen. In addition, fertilizers are often broadcast to the cover grass as needed. <br /> Irrigation was applied as needed. <br /> Since the vineyard system is periodically tested and recommendations are provided by <br /> agricultural consultants, the vineyard is assumed to be"in balance"—the proper nutrients and <br /> irrigation is applied to the vineyard. The irrigation and nitrogen provided to the vineyard will not <br /> be considered in the nitrate loading balance. <br /> Nitrates from Winery Waste <br /> The planned winery production is 3,600 gallons of wine per year. The waste water <br /> generated from wine processing is the wash water needed to clean equipment and clean the inside <br /> of the storage tank. The winery waste water will be contained in a tank and hauled off the site. <br /> Since the waste water will be removed from the site, it will not be considered in the nitrate <br /> loading balance. <br /> Table 6 presents the summary of the nitrate loading analysis which considers nitrogen <br /> from septic system waste water and nitrogen from rain water. The calculations were based on the <br /> Hantzshe and Finnemore equation shown on Plate 9. As a result of the analysis,the use of the <br /> septic system will not cause a build up of nitrates above the maximum contaminate level for <br /> nitrates (10 mg/L-N) for the given assumptions. This is primally due to the large size of the <br /> property and relative low daily flow of domestic waste water. <br /> s Vitosh,M.L.,J.W.Johnson and D.B.Mengel,July 1995.Tri-state Fertilizer Recommendations for <br /> Com,Soybeans,Wheat and Alfalfa,Extension Bulletin E-2567. <br /> ?�E q10 <br /> 4 <br /> y <br /> 2 <br />