AgdaPkt 2017-05-08 Joint SA PFA - Laserfiche WebLink

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Page 8 of 26 ATTY/RESO.0042/CC RESO CALIFORNIA WAY WATER TANK, PUMP STATION AND PIPELINE PROJECT REV: 05-03-17 PR df HAZ -2: Excavation and grading shall avoid potential serpentine rock when feasible. If serpentine must be graded, the top 2 feet of soil shall be replaced with clean soil, so as to avoid impacts from Naturally Occurring Asbestos (NOA). Soils with NOA shall be removed and disposed of at an appropriate facility, to the satisfaction of the City Engineer. Dust shall be suppressed during grading, and a dust control plan to minimize exposure to NOA (per the BAAQMD regulations) shall be submitted to the County Health System’s Department Environmental Health. Finding: Implementation of Mitigations HAZ-1 and HAZ-2 would reduce the construction- related impact of exposure to hazardous materials to a less than sig nificant level. Facts in Support of Finding: These mitigation measures are consistent with best management practice to reduce exposure to hazardous materials during construction. Implementing the recommendations from the above noted pre-demolition evaluation and covering any exposed serpentine rock with two feet of soil will reduce the risk of accidental release of hazardous materials at the project site and ensure the public or environment is not exposed to significant hazards. Noise Impact: NOI-1: Construction activities could expose the public to noise levels in excess of standards established in the City’s General Plan and/or Noise Ordinance. Mitigations: NOI-1: Construction equipment shall be properly outfitted and maintained with noise- reduction devices to minimize construction-generated noise. Equipment and delivery trucks shall not be left to idle for longer than a few minutes. Stationary construction equipment shall be located on-site at the greatest distance possible from nearby noise- sensitive receptors. If during construction, noise levels at the property boundary exceed the City’s noise ordinance standard of 110 dB, the construction contractor and/or City shall erect temporary attenuating buffers to shield adjacent properties from noise exceeding the established standard. The attenuating buffers may be removed as soon as the construction noise levels fall under 110 dB at the property boundary. NOI-2: Impact tools (e.g., jackhammers, pavement breakers, and rock drills), if used for project construction, shall be hydraulically or electrically powered wherever possible to avoid noise associated with compressed-air exhaust from pneumatically powered tools. However, where use of pneumatic tools is unavoidable, an exhaust muffler on the compressed-air exhaust shall be used; such mufflers can lower noise levels from the exhaust by up to 10 dBA. External jackets on the tools themselves shall be used where feasible, which could achieve a reduction of 5 dBA. Quieter procedures shall be used, such as drills rather than impact equipment, whenever feasible. NOI-3: Construction activities shall be limited to the hours of 7:00 a.m. and 4:00 p.m., Monday through Friday, which is more restrictive than the noise ordinance requirements. Signs required by the noise ordinance shall reflect the more 8.A. - Page 15