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City of Pleasanton—Hidden Canyon Residences and Preserve Air Quality Draft EIR 3.2-26 FirstCarbon Solutions https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480016/EIR/3 - Draft EIR/21480016 Sec03-02 Air Quality.docx • Cover trucks hauling soil, sand, and other loose materials and/or ensure that all trucks hauling such materials maintain at least two feet of freeboard. • Remove visible mud or dirt trackout onto adjacent public roads using wet power vacuum street sweepers at least once per day. The use of dry power sweeping is prohibited. • Enclose, cover, water twice daily or apply non-toxic soil binders to exposed stockpiles (dirt, sand, etc.). • Pave new or improved roadways, driveways, and sidewalks as soon as possible. • Lay building pads as soon as possible after grading unless seeding or soil binders are used. • Limit all vehicle speeds on unpaved roads to 15 mph. • Replant vegetation in disturbed areas as quickly as possible. • Install sandbags or other erosion control measures to prevent silt runoff to public roadways. • Minimize idling times either by shutting off equipment when not in use or reducing the maximum idling time to 5 minutes (as required by the California Airborne Toxic Control Measure (ATCM ) Title 13, Section 2485 of California Code of Regulations). Provide clear signage for construction workers at all access points. • All construction equipment shall be maintained and properly tuned in accordance with manufacturer’s specifications. All equipment shall be checked by a certified visible emissions evaluator. • Post a publicly visible sign with the telephone number and person to contact at the lead agency regarding dust complaints. Level of Significance Before Mitigation Less than significant impact. Mitigation Measures None. Impact AIR-2: The proposed project would not result in a cumulatively considerable net increase of any criteria pollutant for which the project region is nonattainment under an applicable federal or State ambient air quality standard. Impact Analysis This impact is related to the cumulative effect of a project’s regional criteria pollutant emissions. By its nature, air pollution is largely a cumulative impact resulting from emissions generated over a large geographic region. The nonattainment status of regional pollutants results from past and present development within the SFBAAB, and this regional impact is a cumulative impact. Therefore, new development projects (such as the proposed project) within the SFBAAB would contribute to this impact only on a cumulative basis. No single project would be sufficient in size, by itself, to result in nonattainment of regional air quality standards. Instead, a project’s emissions may be individually limited but cumulatively considerable when evaluated in combination with past, present, and future development projects.