Mitigation Monitoring and Reporting Matrix (continued)

Significant Impact Being Mitigated

Mitigation Measure

Responsibility for Implementation

Enforcement Responsibility

Monitoring Responsibility/ Frequency

Actions Indicating Compliance

Noise and Vibration (cont.)

air exhaust from pneumatically powered tools. Where use of pneumatic tools is unavoidable, an exhaust muffler on the compressed air exhaust shall be used; this muffler can lower noise levels from the exhaust by up to about 10 dBA. External jackets on the tools themselves shall be used where feasible; this could achieve a reduction of 5 dBA. Quieter procedures, such as use of drills rather than impact tools, shall be used;

• Stationary noise sources shall be located as far as possible from adjacent receptors, and they shall be muffled and enclosed within temporary sheds, incorporate insulation barriers, or include other measures;
• Erect temporary plywood noise barriers around the construction site when adjacent occupied sensitive land uses are present within 75 feet;
• Implement “quiet” pile-driving technology (such as pre-drilling of piles and the use of more than one pile driver to shorten the total pile driving duration), where feasible, in consideration of geotechnical and structural requirements and conditions;
• Use noise control blankets on building structures as buildings are erected to reduce noise emission from the site; and
• Use cushion blocks to dampen impact noise.

Construction noise.

DSP, DSP-V, CPP, &

CPP-V scenarios

4.J-4b: Prior to City issuance of grading permits, applicants for site-specific development projects within the Project Site shall submit to the Brisbane Building Department, a list of measures that will be undertaken to respond to and track complaints pertaining to construction noise, including:

• A procedure for notifying the Building Department staff of complaints;
• A plan for posting onsite signs pertaining to permitted construction days and hours, complaint procedures, and the contact person who should be notified in the event of a problem;

Applicants for site-specific development

Community Development Director

The Community Development Department shall review the measures proposed by applicants for site-specific development projects.

The City Building Official shall not issue a grading permit until given clearance by the Community Development Director that the required

Approval of site-specific development in compliance with Mitigation Measure 4.J- 4a.