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5.0 Environmental Analysis 5.6 Noise Avion Project SEIR Page 5.6-9 6. To verify compliance with the blasting vibration limitations, all blasting operations shall be monitored with a seismograph located at the nearest structure. All seismograph reports shall be submitted to the City. 7. The City shall require a one-time notice in writing for each blast to the local fire agency and dispatch center and to all residences, including mobile homes, and businesses within 300 feet of potential minor blast locations. The notice shall be given not less than 24 hours, but not more than one week, before each blasting operation. 8. If any measure identified cannot be complied with, the project contractor shall obtain a City- approved noise consultant to perform noise and vibration monitoring until all measures can be complied with. The noise consultant shall conduct noise and vibration measurements at the nearest residence(s). The noise measurements shall be conducted for the duration of construction activities that do not comply with all measures. The noise consultant shall have the authority to stop work if noise levels exceed the City standards for construction (Section 59.5.0404 of the City’s Noise Abatement and Control Ordinance), or exceed applicable vibration limits as defined in this report. At the conclusion of monitoring, the noise consultant shall prepare a letter report summarizing the measurements and findings, including any measures used to reduce noise and vibrations levels. The report shall include all measurement and calculation data used in determining impacts and resolutions and submitted to the Director of Community Development. Implementation of these strategies would further ensure that vibrations from blasting would not exceed 2.0 in/sec PPV at the nearest residence. b. Multi-Habitat Planning Area The proposed MHPA BLA would remove minor encroachment areas and add un-disturbed on-site habitat not currently in the MHPA into the preserve (Figure 5.6-2). The occupied MHPA habitat is subject to an hourly limit of 60 dB(A) Leq or the average ambient noise level, whichever is greater, at the edge of habitat during the identified sensitive species breeding season of February 1 to September 15. Possible blasting locations in relation to the proposed MHPA lands are presented in Figure 5.6-2. As described in Section 5.1.4.2c above, the project would be consistent with all of the MSCP MHPA Land Use Adjacency Guidelines, including guidelines for noise. Per the MSCP MHPA Land Use Adjacency Guidelines, if coastal California gnatcatcher is present within the MHPA, construction noise levels at the MHPA boundary shall not exceed 60 A-weighted decibels.