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REGIONAL WATER BOARD RE&NSE (SWRCB/OCC FILE A-1886) • -2- PETITION FOR REVIEW OF WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2007-0113 (NPDES NO. CA0079243) CITY OF LODI, WHITE SLOUGH WATER POLLUTION CONTROL FACILITY municipal wastewater is treated to at least secondary level and stored in the Facility's 40-acres of unlined storage ponds (Storage Ponds) for irrigation on the agricultural fields. The Facility's treatment process consists of comminutors, mechanical grit removal, primary sedimentation, conventional activated sludge, secondary sedimentation, tertiary treatment through cloth media filtration to 10 microns, and ultraviolet pathogen deactivation. Biosolids are anaerobically digested, and then directed to a concrete-lined sludge stabilization lagoon. Currently, some of the sludge fluids, specifically supernatant from the lagoon and subnatant from Dissolved Air Flotation Unit, are directed to the Storage Ponds; however, the Discharger is currently constructing a system to redirect these flows back to the Facility's treatment system. The Discharger is also installing new diffusers in two aeration basins, flow modifications to its aeration basins, and adding two new aeration basins, all of which to achieve improved nitrification and denitrification. These Facility improvements are scheduled to be fully implemented in 2009. The industrial wastewater collection system accepts primarily food processing wastewater from Pacific Coast Producers, a large fruit canning facility, which comprises approximately 90% of the industrial waste flow during the summer months. The remaining industries that discharge to the industrial line include Holz Rubber Company, Thule Towing Systems (formerly Valley Industries), M&R Packing, Lodi Iron Works, Chevron, and Van Ruiten Winery. The industrial collection system influent does not receive treatment at the Facility, and during the non-growing season is stored in the Storage Ponds. During the growing season, typically May through September, the influent is used to irrigate the Discharger's agricultural land, and at times, may be mixed inline with biosolids, treated municipal wastewater, or the Storage Pond's waters. WDR Order No. R5-2007-0113 (NPDES No. CA 0079243), for the City of Lodi White Slough Water Pollution Control Facility contains NPDES discharge requirements for the effluent discharges to the surface water, and waste discharge requirements for the wastewater and biosolids applied to the agricultural land. REGIONAL WATER BOARD PERMITTING ACTIVITIES The Regional Water Board circulated an Administrative Draft Order to the Petitioner and the Discharger on 24 April 2007, and written comments were due on 15 May 2007. The Regional Water Board also circulated the Tentative Draft Order on 13 July 2007, to the Petitioner and the Discharger, and to all interested persons. Written comments were due on 17 August 2007. A Public Hearing was held on 14 September 2007, and notification to the public was provided through publication of a notice of public hearing in the Lodi News Sentinel on 18 July 2007, and by posting the notice at the Facility and the nearest Post Office. The tentative permit and notice of public hearing were additionally posted on the Regional Water Board's internet website during the public comment period and for a ten day period prior to the Regional Water Board meeting. The Petitioner submitted written comments on 17 August 2007, and the Regional Water Board provided a response to those comments on 27 August 2007.