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Rainfall <br /> The average annual rainfall in the area is purported to be 17.0 inches. The area has had higher rates <br /> of rainfall in recent years. Rainfall records recorded by the NCDC Cooperative Stations were used as the <br /> source for the new dairy site. Refer to Figure 3,Appendix I.I. <br /> The 25 year, 24 hour storm event for this area is approximately 3.4".' Refer to 25 Year, 24 Hour <br /> Rainfall Event,Appendix II. <br /> The area is arid. The soil is classified as "moderately well drained'. The ground water is <br /> approximately 10-18 feet below the surface, so it is safe to say that down gradient groundwater intrusion <br /> from rainfall is not likely. The farmed properties involved with this dairy facility are all properly graded to <br /> 0.2%of fall to accommodate proper water flow and minimize water runoff and topsoil erosion.. All fields <br /> have water return systems and are bordered to prevent uncontrolled runoff from the site. Clear rainfall <br /> runoff from the fields is diverted to the white slough, which is located approximately 1 mile to the west. <br /> Refer to Irrigation Map,Appendix ID. <br /> t.Apicult"Waste ManWment Field Handbook USDA,SCS <br /> °Western Design/David Avila 2001 7 <br />