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ENVIRONMENTAL IMPACT REPORT ADDENDUM <br />Bristol Street Widening Phase IIIB — Washington Avenue to 17" Street <br />approximately eight miles to the west. The proposed widening would not result in greater impacts than <br />previously analyzed in the 1990 FEIS /EIR. <br />Mitigation Measures <br />No new additional mitigation measures are required. <br />a.)ii Strong seismic ground shaking? <br />The Newport- Inglewood Fault is the closest fault to the Project site and is the most likely source of <br />ground shaking impacts. The proposed Project is an intersection widening project and would not expose <br />people or structures to adverse ground shaking impact. The proposed widening would not result in greater <br />impacts than previously analyzed in the 1990 FEIS/EIR. <br />Mitigation Measures <br />No new additional mitigation measures are required. <br />a.)iii Seismic- relatedgroundfailure,including liquefaction? <br />The Project site is not identified by the 1990 FEIS /EIR as having a high liquefaction potential but is near <br />areas classified as having high to medium liquefaction potential. In addition, the Project would be <br />constructed to achieve the standards outlined in the California Building Code to reduce impacts in this <br />regard. Consequently, the proposed Project would not expose people or structures to potential liquefaction <br />impact. The proposed widening would not result in greater impacts than previously analyzed in the 1990 <br />FEIS /EIR. <br />Mitigation Measures <br />No new additional mitigation measures are required. <br />a.)iv Landslides? <br />The proposed Project site is generally flat and does not contain any significant slopes. The proposed <br />Project would not result in greater impacts than previously analyzed in the 1990 Final EIS /EIR. <br />Mitigation Measures <br />No new additional mitigation measures are required. <br />b.) Result in substantial sail erosion or the loss of topsoil? <br />Exposure of barren rock and soil surfaces during construction would result in soil erosion. However, <br />considering the slight gradient, anticipated erosion impact is minimal. Furthermore, the Project would be <br />subject to National Pollutant Discharge Elimination System (NPDES) permitting regulation, including the <br />ANA 111 -334 (PER- 02 -01) CITY OF SANTA ANA (11/25/1013 REV2) 132897 CM PAGE32 <br />55B -39 <br />