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Fountaingrove Environmental Impact Report - City of Santa Rosa ...

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4.0 MITIGATION MONITORING AND REPORTING PROGRAM<br />

TABLE 4-1<br />

Mitigation Monitoring and <strong>Report</strong>ing Program<br />

Documentation<br />

Additional Permit<br />

Enforcement<br />

Implementation<br />

Schedule<br />

<strong>Impact</strong>s Mitigation Measures Responsible<br />

Party<br />

larger or continuous gaps at the base and have a<br />

minimum surface weight <strong>of</strong> 3.0 pounds per square<br />

foot (lb/ft 2 ).<br />

• Screw-type compressors should not be specified at<br />

the Project, due to the tonal nature <strong>of</strong> the noise<br />

emitted. However, if screw-type compressors cannot<br />

be avoided, the following measures may be<br />

necessary to attenuate tonal noise emissions:<br />

− Wrap all compressors with 1–inch-thick fiberglass<br />

or closed cell foam insulation. The wrap needs to<br />

completely enclose the compressors and all<br />

refrigerant piping.<br />

− Wrap this insulation with a noise barrier jacket,<br />

preferably metal (mass-loaded vinyl is also<br />

acoustically acceptable but may not weather well).<br />

This barrier jacket material should be selected for<br />

a nominal face weight <strong>of</strong> 0.5-1 lb/ft 2 . The noise<br />

barrier jacket should have a minimal size and<br />

number <strong>of</strong> openings.<br />

− Make the noise barrier jacket serviceable with<br />

provisions in the jacket fabrication for access to<br />

the service valves (suction and discharge) and<br />

other normal access ports. The jacket should also<br />

be made so that it may be removed and replaced<br />

without destruction <strong>of</strong> the insulation.<br />

− Insert silencers (pulse diffusers) in the compressor<br />

discharges to attenuate compressor discharge<br />

noise.<br />

Install a bank <strong>of</strong> acoustical louvers at the air intakes with<br />

an insertion loss <strong>of</strong> greater than or equal to 12 decibels at<br />

500 hertz to control intake noise.<br />

<strong>Impact</strong> 3.10-3: The Project could result in an increase in noise from construction activities. Mitigation Measure 3.10-3: Implement BMPs during <strong>City</strong> <strong>of</strong> <strong>Santa</strong> During<br />

N/A Written Certification <strong>of</strong> BMP installation.<br />

construction.<br />

<strong>Rosa</strong><br />

development <strong>of</strong><br />

Construction <strong>of</strong> the Project would increase noise levels in the vicinity <strong>of</strong> the Project site and<br />

Department <strong>of</strong> plans and<br />

Project Plans and specification to adopt<br />

along transportation corridors used by construction equipment and workers during the<br />

• Construction Scheduling. The following measures<br />

Community specifications.<br />

noise-reducing BMPs.<br />

construction period. Equipment generating noise during construction includes jackhammers, will be implemented to limit construction related<br />

Development<br />

backhoes, trucks, and grading and paving equipment. The Noise Study in Appendix O <strong>of</strong> this activities to the portion <strong>of</strong> the day when the number<br />

Draft <strong>Environmental</strong> <strong>Impact</strong> <strong>Report</strong> (EIR) provides information on typical noise levels at<br />

<strong>of</strong> persons in the adjacent residential uses is lowest: Construction<br />

construction sites. Noise produced by construction activities would be audible and exceed<br />

− Limit construction hours between 7:00 AM and Contractor<br />

existing noise levels in the vicinity <strong>of</strong> the Project site during the construction period,<br />

7:00 PM, Monday through Saturday<br />

designated Noise<br />

constituting a significant but temporary noise impact.<br />

− Do not allow machinery to be cleaned past Disturbance<br />

6:00 PM or serviced past 6:45 PM Monday Coordinator<br />

through Friday<br />

− Limit the allowable hours for delivery trucks to<br />

8:30 AM—5:00 PM, Monday through Friday<br />

• Construction Equipment Mufflers and Maintenance.<br />

Properly muffle and maintain equipment powered by<br />

internal combustion engines.<br />

• Idling Prohibitions. Prohibit unnecessary idling <strong>of</strong><br />

internal combustion engines. Equipment should be<br />

turned <strong>of</strong>f when not in use.<br />

• Equipment Location and Shielding. Locate stationary<br />

noise-generating construction equipment such as air<br />

compressors as far as practical from nearby<br />

residences and other noise-sensitive land areas. If<br />

equipment cannot be located away from residences,<br />

temporary noise barriers, such as mass-loaded<br />

construction blankets, should be installed around the<br />

equipment during its use.<br />

4-14 ES092008001PHX\ BAO\082970001

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