2024-053 - Final Supplemental for The Related Bristol Specific Plan Project

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associated with individual sites. The closest cumulative development project is located across Bristol Street at the southeast corner of Bristol Street and MacArthur Boulevard, approximately 129 feet from the Project site. The cumulative project across Bristol Street is a renovation of the existing Chick-Fil-A restaurant and would not include extensive redevelopment of the area. It is unlikely that similar construction activities involving hazardous materials would occur simultaneously that could have the potential to cumulatively contribute to an impact. All hazardous materials users and transporters, as well as hazardous waste generators and disposers are subject to regulations that require proper transport, handling, use, storage, and disposal of such materials to ensure public safety, which are verified by the City during the construction and development permitting process. Thus, if hazardous materials are found to be present on present or future project sites appropriate remediation activities would be required pursuant to standard federal, state, and regional regulations. Mitigation Measure FIAZ-1 would be implemented to ensure that hazardous soil from the site would be handled and disposed of pursuant to existing regulations, which would reduce the potential of the proposed Project to result in a hazard that could cumulatively combine. Further, compliance with the relevant federal, state, and local regulations during the construction and operation of related projects would ensure that cumulative impacts from hazardous materials and emergency response/evacuation would be less than significant. (Draft Supplemental EIR at p. 5.6- 29.) I Hydrology and Water Qualify Water Quality: The geographic scope for cumulative impacts related to hydrology and water quality includes the Santa Ana Watershed and the Newport Back Bay because cumulative projects and developments pursuant to the proposed Project could incrementally exacerbate the existing impaired conditions and could result in new pollutant related impairments. Related developments within the watershed would be required to implement water quality control measures pursuant to the same NPDES General Construction Permit that requires implementation of a SWPPP (for construction), a WQMP (for operation) and BMPs to eliminate or reduce the discharge of pollutants in stormwater discharges, reduce runoff, reduce erosion and sedimentation, and increase filtration and infiltration, in areas permitted. The NPDES permit requirements have been set by the State Water Board and implemented by the RWQCB and the ©range County DAMP to reduce incremental effects of individual projects so that they would not become cumulatively considerable. Therefore, overall potential impacts to water quality associated with present and future development in the watershed would not be cumulatively considerable with compliance with all applicable laws, permits, ordinances and plans. As detailed previously, the proposed Project would be implemented in compliance with all regulations, as would be verified during the permitting process. Therefore, cumulative impacts related to water quality would be less than significant. Drainage: The geographic scope for cumulative impacts related to stormwater drainage includes the geographic area served by the existing stormwater infrastructure for the Project area, from capture of runoff through final discharge points. The proposed Project would result in a reduction in storm water runoff and includes installation of vegetated biotreatment systems that would filter and discharge runoff through storm drain connections to the offsite drainage infrastructure. The vegetated biotreatment systems would retain runoff and control drainage, pursuant to the required design storm. As a result, the proposed Project would not generate runoff that could combine with additional runoff from cumulative projects that could cumulatively combine to impact drainage. Thus, cumulative impacts related to drainage would be less than significant.