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ENVIRONMENTAL IMPACT REPORT ADDENDUM <br />Bristol Street and Memory Lane Intersection Improvements — Project No. 17-6883 <br />Certified 1990 FEIS/EIR Mitigation Measures: <br />H-1 SCAQMD Rule 403 will be adhered to, insuring the clean-up of construction -related dirt on approach <br />routes to the site. <br />H-2 Adequate watering techniques will be employed to partially mitigate the impact of construction - <br />generated dust particulates. <br />H-3 Construction equipment will be properly maintained and serviced to minimize exhaust emissions. <br />H-5 The use of energy efficient lighting along Bristol Street (low pressure sodium vapor lights) will be <br />considered to reduce emissions at the power plant serving the area. <br />H-6 Traffic signals along Bristol Street will continue to be synchronized (AQMP control measures K2). <br />H-7 Construction activities will be halted during Stage One and Stage Two smog alerts. <br />Mitigation Measures: No additional new mitigation measures are required. <br />C) Result in a cumulatively considerable net increase of any criteria pollutant for which the project <br />region is non -attainment under an applicable federal or state ambient air quality standard <br />(Including releasing emissions which exceed quantitative thresholds for ozone precursors)? <br />The SCAB is designated by the EPA and the State as being nonattainment for 03, PMro, and PM2.5. In accordance <br />with SCAQMD methodology, any project that does not exceed or can be mitigated to less than the daily threshold <br />values does not add significantly to a cumulative impact. As mentioned above, the development of the proposed <br />Project demonstrates that construction and operational activities would not result in emissions in excess of <br />SCAQMD's threshold values. Since the proposed Project would not exceed the SCAQMD's significance thresholds <br />for construction activities or the operations phase, the SCAQMD does not consider emissions from the Project's <br />emissions to add significantly to any cumulative impact. Furthermore, it should be noted that the proposed Project <br />would improve traffic flow, reduce idling, and encompass the same amount of road capacity for with the existing <br />lane configuration. As such, the Project would continue to result in a beneficial impact. Implementation of the <br />proposed Project would not result in greater impacts than previously analyzed in the 1990 FEIS/EIR. <br />Certified 1990 FEIS/EIR Mitigation Measures: Refer to 1990 FEIS/EIR Mitigation Measures H-1 through H-3 <br />and H-5 through H-7. <br />Mitigation Measures: No additional new mitigation measures are required. <br />d) Expose sensitive receptors to substantial pollutant concentrations? <br />A project could have the potential to expose sensitive receptors to elevated pollutant concentrations if it would cause <br />or contribute substantially to elevated pollutant concentration levels or place the project in an area with elevated <br />pollutant concentrations. An evaluation of air pollutant emissions as it affects local sensitive receptors has been <br />conducted for both the construction and operations phases of the Project. As per the 1990 FEIS/EIR, it was <br />determined that sensitive receptors in the vicinity appeared to experience carbon monoxide levels that exceeded state <br />and federal standards. Additionally, it was found that under future conditions with the Bristol Street Widening <br />Project, sensitive land uses adjacent to the intersections analyzed reduced carbon monoxide levels to less than <br />significant once the sensitive receptors were setback far enough from the intersections. It was also noted that the <br />carbon monoxide concentrations were only analyzed during "worst case" conditions and did not reflect <br />concentrations which were more likely to occur which would be less than significant compared to what was <br />observed. The Project configuration, which was also analyzed as part of the 1990 FEIS/EIR, would serve to <br />increase traffic flow through the intersection, but would not increase the overall road capacity compared to the 1990 <br />FEIS/EIR, and would not result in an increase in the pollutant concentrations near sensitive receptors, as previously <br />analyzed the 1990 FEIS/EIR. In addition, as determined in the 1990 FEIS/EIR, the proposed modifications would <br />increase traffic flow and reduce traffic idling, which would decrease vehicle emissions. Implementation of the <br />proposed Project would not result in greater impacts than previously analyzed in the 1990 FEIS/EIR. <br />Draft I November 2017 3.6 Environmental Consequences <br />75A-35 <br />