20B - AA - COOP AGMT - DIVERSION PROJ

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1.0 INTRODUCTION URS prepared an Initial Study/Mitigated Negative Declaration (IS/MND) for the proposed Santa Ana Delhi Diversion Project (Project) which evaluated the environmental effects of the Project in accordance with the California Environmental Quality Act (CEQA Guidelines). The Project is intended to remove dry- weather channel flows from the Santa Ana Delhi Channel watershed and divert said flows into the Orange County Sanitation District's regional collection system for treatment prior to discharge into the ocean or to be utilized as source water for the regional Ground Water Recharge System. The primary intent of the Project is to protect Upper Newport Back Bay from additional pollutant loading generated by flows from the Santa Ana Delhi Channel watershed. The proposed Project consists of three major components: 1) dry- weather diversion; 2) floatable debris removal system; and 3) pumping facilities to the regional sewer collection system. The Project also includes a 1.6 mile pipeline in Bristol Street to the regional sewer in Baker Street in the City of Costa Mesa. The proposed Project will be located within the Newport Beach Golf Course, adjacent to the east side Aerial Overview Santa Ana Delhi Diversion Project Location of the Santa Ana Delhi Channel approximately 900 feet upstream of the Irvine Avenue. The Project is being developed with cooperation between the Cities of Santa Ana, Newport Beach, and Costa Mesa, Orange County Public Works (OCPW) and the Orange County Flood Control District (OCFCD) (Project Stakeholders). The Project is viewed as a multi - functional benefit and regional water quality improvement project associated with the current and future NPDES requirements and specifically in accordance with the proposed trash amendment to the existing Municipal Separate Storm Sewer System (MS4) permit requirements. The IS /MND concluded that construction and operation of the Project would not result in significant adverse impacts to the environment. In accordance with the CEQA Guidelines, the IS/MND was circulated for public and agency review for a period of 30 days. This review period began on January 27, 2016 and ended on February 25, 2016. Public notice of availability was published in the Orange County Register on January 27, 2016. The Notice of Availability was also provided to the Orange County Clerk's office. The IS /MND was available for review at: • City of Santa Ana Public Works Counter • City of Santa Ana Public Library • Orange County Public Library — Mesa Verde Branch (in Costa Mesa) • City of Santa Ana Public Works Agency website: http : / /www.ei.santa- ana.ca.us /pwa/ 20B-7