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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 />i TE OF CALIFORNIA—CALIFORNIA STATFR N R I N V N NEWSOM, G over o <br />DEPARTMENT OF TRANSPORTATION <br />DISTRICT 12 <br />1750 EAST 4M STREET, SURE 100 <br />SANTA ANA, CA 92705 <br />PHONE (657) 328-6000 <br />FAX (657) 328-6522 <br />TTY 711 <br />w .dot,Co.gov/Caltrans-near-me/districtt2 <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 />o Caifomc Way of Va. <br />File: IGR/CEQA <br />SCH it: 2020100428 <br />DO C # : 12-O RA-2020-015 02 <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. <br />The project proposes to provide maintenance to sewage facilities on 17th Street. <br />The project is located on 17th Street in the City of Santa Ana, near Caltrans <br />tocility State Route 55 (SIR 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 MIND 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 MIND <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 rcquircrrlents. <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, susloinobte, integrated end efficient tronspodetion sysiem to enhance California's economy and iivabsuly" <br />Comments and Responses 2-15 November 2020 <br />75B-30 <br />