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January 2025 19 Environmental Analysis • Operation of the proposed project would exceed South Coast Air Quality Management District standards for VOC, NOX, CO, and PM10 and would result in a projected air quality violation. (Impact 4.2-6: Significant and Unavoidable and no feasible mitigation) • Construction and operation of the proposed project would result in a cumulatively considerable net increase of criteria pollutants for which the proposed project region is in nonattainment under an applicable federal or state ambient air quality standard. (Impact 4.2-7: Significant and Unavoidable and no feasible mitigation) TZC EIR Mitigation Measures MM4.2-1 Trash receptacles within the Transit Zoning Code (SD 84A and SD 84B) will be required to have lids that enable convenient collection and loading and will be emptied on a regular basis, in compliance with City of Santa Ana regulations for the collection of solid waste. (Impact 4.2-1) MM4.2-2 The construction contractor should ensure that no more than 5 acres per day are actively graded or developed. (Impact 4.2-2) MM4.2-3 The construction contractor should ensure that all active disturbed surfaces should be watered three times per day throughout the construction period. (Impact 4.2-2) MM4.2-4 The construction contractor should ensure that the mass grading, fine grading, and structure construction are conducted at separate time periods and do not overlap with one another. (Impact 4.2-2) MM4.2-5 The construction contractor should ensure that all haul roads are watered three (3) times per day. (Impact 4.2-2) MM4.2-6 The construction contractor should ensure that all traffic on unpaved roads is reduced to 15 mph or less. (Impact 4.2-2) MM4.2-7 Project applicants shall require by contract specifications that all diesel-powered equipment used will be retrofitted with after-treatment products (e.g., engine catalysts) to the extent that they are readily available in the South Coast Air Basin. Contract specifications shall be included in project construction documents, which shall be reviewed by the City of Santa Ana prior to issuance of a grading permit. (Impact 4.2-5) MM4.2-8 Project applicants shall require by contract specifications that all heavy-duty diesel- powered equipment operating and refueling at the project site use low-NOX diesel fuel to the extent that it is readily available and cost effective (up to 125 percent of the cost of California Air Resources Board diesel) in the South Coast Air Basin (this does not apply to diesel-powered trucks traveling to and from the project site). Contract specifications shall be included in project construction documents, which shall be reviewed by the City of Santa Ana prior to issuance of a grading permit. (Impact 4.2-5) MM4.2-9 Project applicants shall require by contract specifications that alternative fuel construction equipment (i.e., compressed natural gas, liquid petroleum gas, and unleaded gasoline) be utilized to the extent that the equipment is readily available and cost effective in the South Coast Air Basin. Contract specifications shall be included in project construction documents, which shall be reviewed by the City of Santa Ana prior to issuance of a grading permit. (Impact 4.2-5)