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42 acres of pasture grass with existing runoff control facilites. The highest <br /> hydraulic loading rate would be 1 .4 in. per month for 75,000 gpd and a 21—day <br /> month. This amount could be easily applied, in 8 total hours of sprinkler <br /> system operation during non-rainy periods. <br /> TABLE 2 <br /> MINIMUM IRRIGATION AREAS REQUIRED FOR <br /> A WASTEWATER FLOW RATE OF 1.5 MGD, MAXIMUM <br /> A B <br /> Irrigated Wastewater Minimum Minimum <br /> Pasture Ten Year Percolation Loading Irrigation Irrigation <br /> Water Use Rain Estimate Gross Area Area <br /> Month (in./mo) in. mo (in./mo) (in./mo) (acres) (acres) <br /> June 7.9 .28 2.2 10.34 53 71 <br /> July 8.0 .23 2.2 10.49 163 214 <br /> August 6.4 .27 2.2 8.77 195 214 <br /> September 5.0 .8 2.2 6.74 246 214 <br /> October 4.4 1.59 2.2 5.27 162 214 <br /> Column A: minimum area based on hydraulic loading and crop ET <br /> Column B: minimum area. based on BOD loading of 75 lb/ac/day <br /> Note: Select the larger of columns A or B for a given month. <br /> Design Parameters <br /> Average Monthly Wastewater Flow Rates <br /> June . 500,000 gpd <br /> July - September : 1,500,000 gpd <br /> October : 750,000 gpd <br /> Irrigation Evaporation of 5% used. <br /> Crop coefficient of 0.78 used. <br /> D. System Maintenance <br /> Maintenance of the pipelines and spray irrigation systems will include methods <br /> to prevent nuisance odors. Water will not be allowed to pond in fields and <br /> residual wastewater will be flushed from pipelines. <br /> 5 <br /> RP050-L <br />