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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ADMINISTRATIVE CIVIL LIABILITY COMPLAINT R5-2015-0539 MANDATORY PENALTY IN THE MATTER OF MOUNTAIN HOUSE COMMUNITY SERVICES DISTRICT WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY This Complaint is issued to the Mountain House Community Services District (hereafter Discharger) pursuant to California Water Code (Water Code) section 13385, which authorizes the imposition of Administrative Civil Liability, Water Code section 13323, which authorizes the Executive Officer to issue this Complaint, and Water Code section 7, which authorizes the delegation of the Executive Officer's authority to a deputy, in this case the Assistant Executive Officer. This Complaint is based on allegations that the Discharger violated provisions of Waste Discharge Requirements (WDRs) Orders R5-2007-0039, R5-2013-0004, and R5-2013-0004-01 (NPDES CA0084271). The Assistant Executive Officer of the Central Valley Regional Wastewater Quality Control Board (Central Valley Water Board or Board) alleges the following: 1. The Discharger owns and operates a wastewater collection, treatment and disposal system, and provides sewerage services, for the community of Mountain House. Treated municipal wastewater is discharged to Old River, a water of the United States and part of the Sacramento- San Joaquin Delta. 2. Discharges from the Facility were regulated by the Central Valley Water Board under WDRs Order R5-2007-0039, which was issued on 4 May 2007. On 31 January 2013, effective on 22 March 2013, the Board issued WDRs R5-2013-0004, which contained new requirements and rescinded WDRs Order R5-2007-0039, except for enforcement purposes. On 9 October 2014, Board issued WDRs Order R5-2013-0004-01 which amended WDRs Order R5-2013-0004 to include Delta Regional Monitoring Program requirements. 3. On 4 May 2007, the Central Valley Water Board issued Time Schedule Order (TSO) R5-2007- 0040, providing a time schedule until 30 April 2012 to comply with final effluent limitations for bis(2-ethylhexyl)phthalate, cyanide, group A pesticides (aldrin and heptachlor), and iron. On 2 February 2009, the Board issued TSO R5-2009-0013 and rescinded TSO R5-2007-0040, except for enforcement purposes. TSO R5-2009-0013 provided a time schedule until 30 August 2012 to comply with final effluent limitations for bis(2-ethylhexyl)phthalate, cyanide, group A pesticides (aldrin and heptachlor), iron, total trihalomethanes, dibromochloromethane, and dichlorobromomethane. 4. On 3 August 2012, the Board issued TSO R5-2012-0073 and rescinded TSO R5-2009-0013, except for enforcement purposes. TSO R5-2012-0073 provided a time schedule until 23 June 2017 to comply with final effluent limitation for dibromochloromethane and dichlorobromomethane. On 12 April 2013, the Board issued Order R5-2013-0037, which rescinded TSO R5-2012-0073, except for enforcement purposes. 5. On 31 January 2013, the Board issued TSO R5-2013-0005, which provided a time schedule until 1 February 2018 to comply with the new effluent limitation for temperature.