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7A Page 45 Noise levels at residential property lines around Ptan-facilitated development should be maintained at an t_eq not in excess of 60 dBA during the daytime hours and 50 dBA during nighttime hours (10,00 PM to ?:00 AM), unless ambient noise levels are higher. In those cases, the ambient noise level would be the noise level standard. The approval of future commercial projects near Precise Plan area residential and other noise-sensitive uses may, at City discretion, require a noise study demonstrating how the project--including associated loading docks, refuse areas, and virntilation systems--would meet these standards. Finding: Implementation of these measures to the satisfaction of the Redwood City Building Department would reduce the potential impact on new residential uses to a less fhan significant level. i/I. AIR QUALITY A. Air Quality Impacts Impact 12-1: Construction-Related Air Quality Impacts. Demolition or construction activities permitted and/or facilitated by the proposed Downtown Precise Plan under both the Maximum Intensity and Moderate Intensity alternatives may generate construction-period exhaust emissions and fugitive dust that could temporarily but noticeably affect local air quality. This would represent a potentially significant impact (see criteria 2, 4, and 5 in subsection 12.3.1, "Significance Criteria," above). Mitigation 12-1. For all discretionary grading, demolition, or construction activity in the Precise Plan area, require implementation of the following dust control measures by construction contractors, where applicable: During aemolition of existing structures: • Water active demolition areas to control dust generation during demolition of structures and break-up of pavement. • Cover all trucks hauling demolition debris from the site. • Use dust-proof chutes to load debris into trucks whenever feasible. During all construction phases; • Water all active construction areas at least twice daily. • Water or cover stockpiles of debris, soil, sand, or other materials that can be blown by the wind. • Cover all firucks hauling soil, sand, and other loose materials, or require all trucks to maintain at least two feet of freeboard. • Pave, apply water three times daily, or apply (non-toxic) soil stabilizers on all unpaved access roads, parking areas, and staging areas at construction sites. • Sweep daily (with water sweepers) all paved access roads, parking areas, and staging areas at construction sites. AttylResolReso.1683 2g 030707