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I \ <br /> Fact Sheet No. 4 For Dairies -5- <br /> Careful management of irrigation water is necessary to ensure that nutrients are applied t cropland t t <br /> g g ry app ed o crop a d a he desired rate <br /> and that adverse impacts to the environment are minimized. Proper irrigation results in even application of nutrients to <br /> cropland and prevents excessive percolation and runoff that can,respectively,result in adverse impacts to groundwater <br /> and surface water. The Irrigation Water Management component of a NIWMP is a written description of procedures <br /> that are followed for proper irrigation,and should address the following topics: <br /> • Procedures that are used to mix wastewater and "clean" irrigation water <br /> a <br /> • The irrigation system used to apply wastewater to cropland <br /> F, • The methods used to determine and control the rate of application <br /> - <br /> • Procedures followed to determine when sufficient water has been applied <br /> • Physical and management controls used to prevent tailwater containing manure from moving off of the dairy <br /> ... i • Controls that will be used if it becomes necessary to apply wastewater to land during the rainy season <br /> • Procedures used to prevent irrigation with wastewater from creating nuisance conditions. <br /> S ' In addition,the NTWMP should contain figures that show the location of cropland where manure and wastewater is <br /> applied. The figures should show nearby water courses and ditches, the slope of irrigated lands, the location of wells <br /> and pumps,and points from which tailwater can be discharged. If wastewater is applied to property under different <br /> ownership than the dairy,a copy of agreements on the application of wastewater to the property should be included. <br /> Additional information related to the preparation of Nutrient and Irrigation Water Management Plans is available in the <br /> "Environmental Stewardship Short Course for California Dairy Operators"presented by the University of California <br /> Cooperative Extension in cooperation with the California Farm Bureau, Milk Producers Council,and Western United <br /> Dairymen. For more information about the water quality programs that apply to confined animal facilities,contact the <br /> RWQCB dairy regulatory staff at one of the following offices: <br /> I <br /> • ,Sacramento (916) 255-3000 <br /> 6 1 • Fresno (559) 445-5116 <br /> • Redding (916) 224-4845 <br /> 1 } . <br /> fK <br /> I <br /> �r <br /> I. <br /> Ps-#4d.doc <br />