Reso13 PC 13-09 2859 Initial Study Mitigated Negative Declaration Kensington

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The results of the assessment indicate an incremental child cancer risk of 83 excess cancer cases per one million and the adult incremental cancer risk of 0.4 excess cancer cases one per million. Both of these cancer risk levels are below BAAQMD's threshold of 10 in one million excess cancer cases per million. As a result,the project would have a less than significant impact with respect to community risk caused by construction activities. (Less Than Significant Impact) Dust Generation Construction activities on the site would include demolition of the existing buildings, excavation, and grading of the site which will generate dust and other particulate matter. Use of heavy equipment would also generate emissions. The proposed project is well below the BAAQMD construction- related screening criteria of 240 dwelling units for ROG. As a result,improvements made to the project site would not generate significant amounts of emissions that would impact sensitive receptors or temporarily increase local pollutant levels. The generation of dust and other particulate matter could,however,temporarily impact nearby sensitive receptors. Impact AIR-l: Construction activities would generate dust and other particulate matter that could impact workers on adjacent properties or guests at the adjacent hotel. (Significant Impact) Mitigation and Avoidance Measures The following mitigation measures, consistent with BAAQMD recommendations,will be implemented during all applicable phases of construction to reduce dust impacts: MM AIR 1-l: All exposed surfaces (e.g.,parking areas, staging areas, soil piles, graded areas, and unpaved access roads) shall be watered two times per day. MM AIR 1-2: All haul trucks transporting soil, sand, or other loose material off-site shall be covered. MM AIR 1-3: All visible mud or dirt track-out onto adjacent public roads shall be removed using wet power vacuum street sweepers at least once per day. The use of dry power sweeping is prohibited. MM AIR 1-4: All vehicle speeds on unpaved roads shall be limited to 15 mph. MM AIR 1-5: All roadways, driveways, and sidewalks to be paved shall be completed as soon as possible. Building pads shall be laid as soon as possible after grading unless seeding or soil binders are used. MM AIR 1-6: Idling times shall be minimized either by shutting equipment off when not in use or reducing the maximum idling time to 5 minutes (as required by the California airborne toxics control measure Title 13, Section 2485 of California Code of Regulations [CCR]). Clear signage shall be provided for construction workers at all access points. Kensington Assisted Living Facility Project 23 Initial Study Redwood City Apri12013