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California 'egional Water Quality C, trol Board <br /> Central Valley Region <br /> Katherine Hart,Chair <br /> Linda S.Adams 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Arnold <br /> Secretary for Phone(916)464-3291 •FAX(916)464-4645 Schwarzenegger <br /> Environmental http://www.watetoards.ca.govlcentralvalley Governor <br /> Protection <br /> FREQUENTLY ASKED QUESTIONS REGARDING <br /> WASTE MANAGEMENT PLANS <br /> 2 June 2010 <br /> The Central Valley Regional Water Quality Control Board (Central Valley Water Board) <br /> adopted Waste Discharge Requirements General Order No. R5-2007-0035 for Existing Milk <br /> Cow Dairies (General Order) on 3 May 2007. The General Order requires that a Waste <br /> Management Plan which addresses flooding, wastewater storage, production area conditions, <br /> operation and maintenance plans, and backflow be submitted to the Central Valley Water <br /> Board. The elements of the Waste Management Plan are due to the Board according to the <br /> schedule in Table 1 of the General Order. The due date for items that were originally due on <br /> 1 July 2009 was extended to 1 July 2010 by Order No. R5-2009-0029, adopted by the Central <br /> Valley Water Board on 23 April 2009. <br /> A separate FAQ on Backflow Prevention is posted on the Central Valley Water Board website <br /> at: <br /> hftp://ww.w.waterboards.ca.gov/centralvalley/water issues/dairies/general order Guidance/ind <br /> ex.shtml . <br /> If you have additional questions, you may contact Central Valley Water Board staff. The FAQs <br /> will be periodically updated to include answers to new questions that are asked. Please check <br /> the Central Valley Water Board website at the above URL for these updates. <br /> Flood Protection Questions: <br /> 1. What part of the dairy needs to be protected from flooding? <br /> The production area needs to be protected from flood events according to the requirements <br /> in the General Order. The General Order does not have a requirement to protect the <br /> cropland from flooding. However, flooding may make it impossible to apply wastewater to <br /> the land application area in a manner that is consistent with the Nutrient Management Plan <br /> (NMP). Therefore, if the cropland is expected to be flooded for extended periods of time, <br /> so that wastewater can't be land applied, the WMP storage calculations must reflect an <br /> extended storage period. <br /> 2. What are the 20-year and 100-year flood levels and how do I find out which <br /> applies to my facility? <br /> Two kinds of flood events, the 20-year and the 100-year"peak stream flow", are referenced <br /> in the General Order. Under the Title 27 regulations, retention ponds or manured areas in <br /> operation on or before 27 November 1984 must be protected from inundation or washout <br /> by overflow from any stream channel during 20-year peak stream flows. This event can <br /> California Environmental Protection Agency <br /> N Recvrlwd Panar <br />