Item 18 - Appeal Application Nos. 2023-02 and 2023-03 for Cabrillo Town Center project

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area. The Overlay Zone is located directly between two heavily traveled freeways (1-5 and SR- 55), which could emit hazardous amounts of diesel exhaust. Due to the proximity of the freeways and the potential increase in residential uses as a result of project implementation, this could pose a potentially significant impact. In order to ensure that existing conditions within the Overlay Zone area do not pose a significant health threat to future uses, compliance with Mitigation Measure MM-OZ 4.6-1 would be required. Implementation of Mitigation Measure MM-OZ 4.6-1 would ensure that risks associated with diesel emissions from the nearby freeways would be thoroughly evaluated prior to construction of residential uses. The health risk assessments would identify any unacceptable risk and would provide recommendations to reduce the risk within acceptable limits. Thus, development within the Overlay Zone would not pose an actual or potential endangerment to future residents. Therefore, it was determined that this impact will be reduced to a less than significant level. Release of Hazardous Materials The Certified EIR stated that the Overlay Zone would primarily result in urban infill and redevelopment with mixed -uses within the Overlay Zone area, existing structures may need to be demolished prior to the construction of new buildings. Demolition of existing structures could result in exposure of construction personnel and the public to hazardous substances such as asbestos or lead -based paints, depending on the age of the structure. In addition, the disturbance of soils and the demolition of existing structures could result in the exposure of construction workers or employees to health or safety risks if contaminated structures and/or soils are encountered during construction. Exposure to contaminated structures or soil could occur from asbestos or lead in older buildings, unknown contaminants that have not previously been identified, or existing contamination present at locations identified in the site records search. Exposure to hazardous materials during construction activities could occur through any of the following: • Direct dermal contact with hazardous materials • Incidental ingestion of hazardous materials (usually due to improper hygiene, when workers fail to wash their hands before eating, drinking, or smoking) • Inhalation of airborne dust released from dried hazardous materials While specific development projects are not associated with approval of the Overlay Zone it is assumed that older buildings could be demolished as uses are redeveloped according to the overlay zone. With that activity, construction workers and nearby workers and/or future residents could potentially be exposed to airborne lead -based paint dust, asbestos fibers, and/or other contaminants. In addition, there is the possibility that future development may also uncover previously undiscovered soil contamination as well as result in the release of potential contaminants that may be present in building materials (e.g., mold, lead, etc.). It was determined that this could result in a potentially significant impact. Cabrillo Town Center City of Santa Ana Technical Memorandum August 2023 City Council 18 — 570 10/3/2023