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Septic to Gravity Sewer Conversion Project Final Initial Study/Mitigated Negative Declaration FINAL MITIGATED NEGATIVE DECLARATION SEPTIC TO GRAITY SEWER CONVERSION PROJECT Lead Agency: City of Santa Ana Project Proponent: City of Santa Ana 220 S. Daisy Ave Santa Ana, California 92703 Project Location: The project site is located in the Pasadena Street, Medford Avenue, and Deodar Street neighborhood within the City of Santa Ana. Project Description: The proposed Project involves installing sewer mains and laterals to help transfer existing residences from septic systems to the City's sewer system. The Project would install approximately 670 linear feet (LF) of 8-inch sewer main and 4-inch laterals within Pasadena and Medford Avenue from Deodar Street to the west. The Project also replaces the outdated 6" water main and laterals within Deodar Street, Medford Avenue, and Pasadena Avenue. The proposed 8" water main would connect at 17th Street approximately 210' west of Deodar Street, install 1420 LF of 8" water main at Deodar Street, and install an additional 670 LF in Medford and Pasadena Avenue. The Project would install a total of 2,300 LF of 8" water main and transfer 50 properties from City of Tustin water to the City of Santa Ana. The improvements would include replacement of curb and gutter, driveways, street asphalt and other infrastructure where necessary. Construction of the Proposed Project is anticipated to start in 2021 with an approximate duration of nine months. Construction of the sewer and water improvements would occur concurrently. Public Review Period: October 23, 2020 to November 21, 2020 Mitigation Measures Incorporated into the Project to Avoid Significant Effects: Geology and Soils GEO-1: Unanticipated Discovery— Paleontological Resource. If paleontological resources (i.e., fossil remains) are discovered during excavation activities, the contractor will notify the City and cease excavation within 100 feet of the find until a qualified paleontological professional can provide an evaluation of the site. The qualified paleontological professional will evaluate the significance of the find and recommend appropriate measures for the disposition of the site (e.g. fossil recovery, curation, data recovery, and/or monitoring). Construction activities may continue on other parts of the construction site while evaluation and treatment of the paleontological resource takes place. Final Initial Study/Mitigated Negative Declaration 1 November 2020 75B-7