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Septic to Gravity Sewer Conversion Project <br />Final Initial Study/Mitigated Negative Declaration <br />Letter 5 — Caltrans, received November 18, 2020 <br />STAR OF CALIFORNIA CALIFORNIA $TALE IRAN POR1AilON AGENCY GAVIN NEWSOM Govornor <br />DEPARTMENT OF TRANSPORTATION <br />DISTRICT 12 <br />1750 EAST 41H STREET, SUIIE 100 <br />SANTA ANA, GA 92705 <br />PHONE (657) 328-6000 <br />FAX (657) 328-6522 <br />TTY 711 <br />w .dot.ca.gov/railrons-near-me/district12 <br />November 18, 2020 <br />Mr. Armando Fernandez <br />City of Santa Ana <br />20 Civic Center Plaza <br />Santa Ana, CA 92701 <br />Dear Mr. Fernandez, <br />0 <br />Making Conservation <br />a Ca(fornia Way of Ure. <br />File: IGR/CEQA <br />SCH#: 2020100428 <br />DO C # : 12-O R A-2020-01502 <br />SR 55 <br />Thank you for including the California Department of Transportation (Caltrans) in <br />the review of the Mitigated Negative Declaration (MND) for the proposed <br />Septic to Gravity Sewer Conversion Project. The mission of Caltrans is to provide <br />a safe, sustainable, integrated and efficient transportation system to enhance <br />California's economy and livability. 5-1 <br />The project proposes to provide maintenance to sewage facilities on 171h Street. <br />The project is located on 17th Street in the City of Santa Ana, near Caltrans <br />facility State Route 55 (SR 55). Caltrans is a commenting agency and has the <br />following comments: <br />NPDES: <br />1. The project included general language on Water Quality impact as a <br />result of the proposed project construction. The MND mentions that <br />standard BMPs will be used but includes no specifics to further address <br />"erosion and siltation" Impacts. The Water Quality section of the MND <br />doesn't mention any compliance with regulatory requirements issued by <br />the local RWQCB and fails to mention if the city will comply with County of <br />Orange MS4 NPDES permit requirements. <br />5-2 <br />The discussion only mentioned silt and erosion as potential pollutants of <br />concern but does not address the handling of non -storm water runoff <br />discharges that can occur with this type of work. These discharges include <br />non -storm water discharges from saw cutting asphalt concrete to install <br />new sewer lines under the pavement. It fails to mention if groundwater will <br />be encountered during the installation of new pipes and if so, how <br />groundwater discharges will be handled to meet local RWQCB permit <br />"Provide a safe, sostoinable, integrated and efficient Ironsportotlan system to enhance California's economy and livability" <br />Comments and Responses 2-15 November 2020 <br />