CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2009-0002 WASTE DISCHARGE REQUIREMENTS FOR BYRON SANITARY DISTRICT

Water Board) finds that: 1. Byron Sanitary District (hereafter referred to as Discharger) submitted a Report of Waste Discharge (RWD) on 3 March 2008 for updating existing Waste Discharge Requirements (WDRs) for its wastewater treatment facility (WWTF). Supplemental information was received on 1 August 2008. 2. The Byron WWTF was previously regulated under WDRs Order No. 5-00-058, adopted by the Regional Water Board on 17 March 2000, which prescribes requirements for the protection of water quality and sets an average dry weather flow (ADWF) limit of 80,000 gallons per day (gpd). 3. Cleanup and Abatement Order (CAO) Order No. R5-2002-0733 and Time Schedule Order (TSO) No. R5-2005-0900 required facility improvements necessary to protect groundwater quality. This update of Waste Discharge Requirements reflects improvements made to the treatment and disposal facilities to comply with the enforcement orders. Prior to improvements, the WWTF consisted of an influent pump station, bar screens, an Imhoff tank, four treatment ponds, two emergency ponds, and a ten acre land disposal area. Th