14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Environmental Checklist Initial Study/Consistency Checklist 132 FirstCarbon Solutions https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480021/Consistency Checklist/21480021 Spotorno Ranch Consistency Checklist ScreenCheck.docx The proposed project would develop fewer units than what were envisioned in the HVSP. The 5 plus 75 new homes, respectively, that were proposed for Lots 96 and 97 in the Spotorno Upper Valley Area would no longer be developed. In addition, the Bypass Road would not be constructed as part of the proposed project. The reduction in units and elimination of the Bypass Road would result in less ground disturbance and construction traffic trips (short-term noise) as well as less stationary operational and roadway noise (long-term noise) than what was originally analyzed in the 1998 HVSP FEIR which would lessen the noise impacts of the project as a whole. Therefore, the proposed project would not introduce new environmental impacts or create more severe environmental impacts than those analyzed in the 1998 HVSP FEIR in relation to noise. The following section evaluates potential impacts of the project as currently proposed and compares the effect of the project as currently proposed with the analysis and conclusions from the 1998 HVSP FEIR. Short-term Construction Impacts MM C4 of the 1998 HVSP FEIR, which restricts construction activities to the hours of 8:00 a.m. and 5:00 p.m. Monday through Saturday, and on Sundays and holidays from 10:00 a.m. to 6:00 p.m. In addition, according to Section 9.04.100 of the Municipal Code, noise producing construction activities must meet at least one of the following noise limitations: no individual piece of equipment shall produce an operational noise level exceeding 83 A-weighted decibel (dBA) equivalent continuous sound level (Leq) at a distance of 25 feet or the noise level at any receptor outside of the property plane of the project site shall not exceed 86 dBA Leq. Two types of short-term noise impacts would occur during site preparation and project construction. The first type would result from the increase in traffic flow on local streets, associated with the transport of workers, equipment, and materials to and from the project site. The transport of workers and construction equipment and materials to the project site would incrementally increase noise levels on access roads leading to the site. Because workers and construction equipment would use existing routes, noise from passing trucks would be similar to existing vehicle-generated noise on these local roadways. For this reason, short-term intermittent noise from trucks would be minor when averaged over a longer time-period and would not be expected to exceed existing peak noise levels in the project vicinity. Therefore, the proposed project would not result in any peculiar effects and would not result in new or more severe impacts related to short-term construction noise beyond what was previously analyzed in the 1998 HVSP FEIR. The second type of short-term noise impact is related to noise generated during site preparation, grading, and construction activities. Construction is performed in discrete steps, each of which has its own mix of equipment, and consequently, its own noise characteristics. These various sequential phases would change the character of the noise generated on-site. Thus, the noise levels vary as construction progresses. Despite the variety in the types and sizes of construction equipment, similarities in the dominant noise sources and patterns of operation allow construction noise ranges to be categorized by work phase. The site preparation phase, which includes excavation and grading activities, generates the highest noise levels because the noisiest construction equipment is earthmoving equipment. Earthmoving equipment includes excavating machinery and compacting equipment, such as bulldozers, draglines, backhoes, front loaders, roller compactors, scrapers, and graders. Typical operating cycles for these