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City of Pleasanton—Villages at the Quarry Project Consistency Checklist 15183 Consistency Checklist 168 Proposed Project Analysis and Conclusion Existing Noise Conditions The existing noise environment in the vicinity of the project site was documented through a noise monitoring effort performed at the project site. Noise monitoring measurement data sheets are contained in Appendix H. A total of four short-term noise measurements (15 minutes each) were taken on Thursday, April 25, 2024, during the midday peak noise hour. The noise measurements determined that daytime ambient noise levels range from 62.7 dBA to 71.1 dBA Leq along the boundaries of the project site. The noise measurements indicate that noise within the vicinity of the project site is generally characterized by vehicle traffic on local roadways, transfer station operations, private trucking operations, fire department training center activity, and train activity in the distance. The noise measurement documented noise levels from all noise sources in the project vicinity, including any noise from the facilities for the LPFD, PGS, and Pleasanton Public Works Department. Construction Noise The site preparation phase, which includes excavation and grading of the site, tends to generate the highest noise levels because the noisiest construction equipment is earthmoving equipment. The loudest pieces of equipment anticipated to be used in the site preparation phase of construction are graders and excavators. Typical operating cycles for these types of construction equipment may involve 1 or 2 minutes of full power operation followed by 3 or 4 minutes at lower power settings. The maximum noise level generated by graders and excavators is approximately 85 dBA maximum noise/sound level (Lmax) at 50 feet. The nearest adjoining residential property line (future approved residences that will be located across Busch Road) is located approximately 160 feet north of the nearest project construction footprint. At this distance, reasonable worst-case maximum construction noise levels would attenuate to below 68 dBA Leq. The calculation sheet is provided in Appendix H. Additionally, noise levels would drop off at a rate of 6 dBA per doubling of distance as the equipment moves over the project site. Therefore, the proposed project’s construction noise levels would not exceed the City’s construction noise level standard of 86 dBA as measured at the property plane. In addition, because the project would comply with the City’s permissible hours of construction, the resulting reasonable worst-case