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Environmental Checklist For CEQA Compliance mitigation is required. Implementation of Mitigation Measure AQ-1 would reduce impacts to less than significant levels. Table 3-1. Forecast of Regional Construction Emissions Criteria Pollutant Emissions (pounds per day) Construction Phase ROC NOx CO SOx PM,aa PMZ 6a Demolition (1.5 months) 7 59 59 <1 6 2 Site Prep (1 month) 15 108 124 <1 15 6 Building Erection/Finishing (14 months) 63 90 118 <1 3 3 Roadway Improvements (3 months) 8 54 66 <1 2 2 Maximum Concurrent Regional Project 63 115 145 <1 15 6 Emissionsb SCAQMD Regional Emissions Threshold (Ibs/day) 75 100 550 150 150 55 Exceed Threshold? No Yes No No No No Fugitive PM,o and PM2.5 emissions estimates take into account compliance with SCAQMD Rule 403 requirements for fugitive dust suppression. Maximum concurrent emissions for NOx and CO occur in a three month period during simultaneous building construction of the homes and roadway paving; maximums for other criteria pollutants occur in a one month period during the final architectural coatings and paving stages of the homes. Source: Jones & Stokes 2007. URBEMIS 2002 outputs are provided in Air Quality Appendix. Mitigation Measures AQ-1. All onsite diesel construction equipment shall meet EPA Tier 2 emissions standards. Operational Impacts The proposed project would generate fewer daily and peak hour vehicle trips than the existing SAUSD warehouse that exists on the site (370 daily trips, 49 AM peak hour, and 52 PM peak hour trips compared to 364 daily trips, 29 AM peak hour, and 39 PM peak hour trips). Additionally, potential air quality impacts from residential heating equipment would likely be less than from mechanical equipment used at the warehouse and distribution center. Therefore, it can be concluded that operational air quality impacts would be less than significant. C. Less Than Significant Impact with Mitigation Incorporated. The SCAQMD's approach for assessing cumulative impacts is based on the AQMP forecasts of attainment of ambient air quality standards in accordance with the requirements of the Federal and State Clean Air Acts. As discussed earlier in Response No. III-A, the proposed project would be consistent with the AQMP, which is intended to bring the Basin into attainment for all criteria pollutants.2 z CEQA Guidelines Section 15064(h)(3) states "A lead agency may determine that a project's incremental contribution to a cumulative effect is not cumulatively considerable if the project will comply with the requirements in a previously approved plan or mitigation program which provides specific requirements that will avoid or substantially lessen the cumulative problem (e.g. water quality control plan, air quality plan, integrated waste management plan) within the geographic area in which the project is located. Such plans or programs must be Alton Court August 2007 Initial Study/Mitigated Negative Declaration g_~g J&S 00635.07 75A-84