Laserfiche WebLink
L ../ <br /> August 3, 2004 <br /> NOA Project Number: E04081A <br /> Mr. Peterson indicated that a petiole test is performed four to five times per year on the older <br /> vines to test for appropriate application of nitrogen, and that soil tests for nitrate are <br /> performed approximately once every two years. <br /> Since the vineyard system is periodically tested and appears healthy, the vineyard is assumed <br /> to be "in balance," with the proper nutrients and irrigation applied to the vineyard. The <br /> irrigation and nitrogen provided to the vineyard will not be considered in the nitrate loading <br /> calculation. <br /> 7.5 Nitrate Loading Scenario <br /> A nitrate loading scenario was performed to determine the impact from the proposed facility. <br /> The scenario utilizes the variables discussed previously which represent the estimated <br /> conditions and uses associated with this project. The following table presents a summary of <br /> the nitrate loading calculation. <br /> Table 7. <br /> Summary of Nitrate Mass Balance Analysis. <br /> Calculation Result Acres Average Effluent Leachfield Deep <br /> (Nc) (A) Daily Flow Concentration Denitrifi- Percolation of <br /> (Q)(Table 2) (Nw) cation(d) Rainfall(R) <br /> (Plate 9) <br /> see Plate 1 1 2.9 m /L-N 19.31 494 d 5 m L-N 1 10% 6.84 in II <br /> * Maximum contaminant level (MCL)for I in drinking w is mg/L-N. <br /> Based on the method and assumptions described, the result of the nitrate loading balance <br /> indicates that the proposed development will not cause a build up of nitrate in ground water <br /> above 10 mg/L-N over the long term. <br /> 14 <br />