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7.B. - Page 92 2 Environmental Analysis <br /> Normally Acceptable Conditionally Acceptable <br /> Mixed-Use Districts 60 dB CNEL 75 dB CNEL <br /> Commercial-Neighborhood 65 db CNEL 75 dB CNEL <br /> Commercial—Regional 70 dB CNEL 75 dB CNEL <br /> Commercial—Office 65 db CNEL 75 dB CNEL <br /> Professional/Technology <br /> Open Space/Recreational -- 75 dB CNEL <br /> The City Noise Ordinance (Chapter 24 of the Municipal Code) prohibits noise levels generated by <br /> construction within 500 feet of a residential district between the hours of 8:00 pm to 7:00 am <br /> weekdays, or at any time on Saturdays, Sundays, or holidays. Section 24.21 of the ordinance prohibits <br /> noise increases in a residential district of more than 6 dBA above measured ambient levels from an <br /> assembly of three or more persons between the hours of 8:00 pm and 8:00 am. In addition, Section <br /> 24.31 prohibits noise levels for any item of equipment used during construction in a residential <br /> district from exceeding 110 dBA at a distance of 25 feet. <br /> XII. NOISE --Would the project result Potentially Less Than Less Than No <br /> in: Significant Significant Significant Impact <br /> Impact with Impact <br /> Mitigation <br /> Incorporation <br /> a) Exposure of persons to or generation of ❑ ® ❑ ❑ <br /> noise levels in excess of standards <br /> established in the local general plan or <br /> noise ordinance, or applicable standards of <br /> other agencies? <br /> b) Exposure of persons to or generation ❑ ❑ ® ❑ <br /> of excessive groundbome vibration or <br /> groundbome noise levels? <br /> c) A substantial permanent increase in ❑ ❑ ® ❑ <br /> ambient noise levels in the project vicinity <br /> above levels existing without the project? <br /> d) A substantial temporary or periodic ❑ ❑ ® ❑ <br /> increase in ambient noise levels in the <br /> project vicinity above levels existing <br /> without the project? <br /> 2-52 US 101 Pedestrian Undercrossing and Bair <br /> Island Road Storm Drain Pump Station Project <br />