SETTLEMENT AGREEMENT AND STIPULATION FOR ENTRY OF ADMINISTRATIVE CIVIL LIABILITY ORDER. Section I: Introduction This Settlement Agreement and Stipulation for Entry of Administrative Civil Liability Order (Stipulated Order) is entered into by and between the Regional Water Quality Control Board, North Coast Region, Prosecution Team (Prosecution Team) and The City of Ukiah (Discharger) (collectively, “Parties”) and is presented to the Regional Water Quality Control Board, North Coast Region (Regional Water Board), or its delegate, for adoption as an Order by settlement pursuant to Government Code section 11415.60. This Stipulated Order resolves the violations reported by the Discharger, from January 4, 2017, through December 31, 2021, by the imposition of administrative civil liability against the Discharger in the amount of $75,000.
SETTLEMENT AGREEMENT AND STIPULATION FOR ENTRY OF ADMINISTRATIVE CIVIL LIABILITY ORDER. R1-2019-0052, Attachment D: Compliance Project Description Project Title: Loleta Community Services District Wastewater Treatment Plant Improvements Geographic Area of Interest: Loleta, California, Humboldt County Name of Responsible Entity: Loleta Community Services District Contact Information: Xxxxxx Xxxxx General Manager Loleta Community Services District P.O. Box 236 Loleta, California 95551 (000) 000-0000 Project Description: Rehabilitation of the sanitary sewer collection system (SSCS) will reduce inflow and infiltration (I/I) that enters the wastewater system during wet weather causing high flow rates through the wastewater treatment facility (WWTF) that reduces the efficiency of the treatment processes. As I/I enters the wastewater system, it dilutes the wastewater, reducing pollutant concentrations while significantly increasing flow rates. Biological treatment systems (such as, the activated sludge process at the WWTF) rely on hydraulic residence time to remove pollutants from the waste stream. As flows increase, the residence time decreases, and the ability of the biological system to remove pollutants decreases. This significantly reduces the ability of the WWTF to remove pollutants (such as, biochemical oxygen demand [BOD], total suspended solids [TSS], settleable solids, and nitrate). The reduction in pollutant concentrations due to high I/I in the SSCS can also reduce the efficiency of the biological treatment process at the WWTF. Biological systems metabolize waste products at a higher rate at higher pollutant concentrations than they do at lower pollutant concentrations. The combination of decreased residence time and decreased pollutant concentrations due to high I/I in the SSCS combine to significantly reduce the efficiency of the WWTF resulting in effluent violations. Violations associated with the existing chlorine disinfection system include pH, total coliform, carbon tetrachloride, chlorodibromomethane, and dichlorobromomethane. These violations are being addressed through the replacement of the chlorine disinfection system with a new ultraviolet (UV) disinfection system included in the State Water Resources Control Board (SWRCB) Clean Water State Revolving Fund (CWSRF) projects described below. The Discharger has conducted over $500,000 in planning, permitting, and preliminary engineering design to address the causes of the violations and is in the process of submitting two financial assistance applications for design and con...
