14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Environmental Checklist Initial Study/Consistency Checklist 152 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 addition of project traffic at a study intersection would result in the 95th percentile vehicle queue exceeding the available storage or would increase 95th percentile queue by more than two vehicles where the queue already exceeds the available storage space (for example, vehicle queues spilling back from ramp terminal intersections to the freeway mainline, or vehicle queues extending beyond the available turn pocket length, impeding travel in the adjacent lanes). a) Congestion Management Plan Would the project: Conflict with an applicable congestion management program, including, but not limited to level of service standards and travel demand measures, or other standards established by the county congestion management agency for designated roads or highways? The 1998 HVSP FEIR determined that the project would result in Level of Service (LOS) impacts that are nearly identical to those under the General Plan buildout scenario for the Happy Valley Specific Plan Area. Additionally, the 1998 HVSP FEIR determined that traffic associated with the Specific Plan project together with traffic generated by other future development would contribute to cumulative traffic levels in the regional system that were projected to violate the standard adopted by the Tri- Valley Transportation Council, which would be a cumulative impact. This was determined to be an unmitigable, unavoidable impact that the city considered in adopting a statement of overriding considerations when certifying the HVSP FEIR. The current proposed project does not change that conclusion. Trip Generation The 1998 HVSP FEIR developed a project-specific trip rate of 12.8 trips per day per dwelling unit. This would have resulted in 282 trips per day for the 22 units proposed for the Spotorno Flat Area. A 2018 Traffic Impact Analysis (TIA) was conducted as part of a Draft SEIR for a previously proposed project of 39 units on this site. That analysis estimated that the 39-unit project would generate an average of 390 trips on Saturdays and 370 trips on weekdays. These number are provided for comparison and so that analysis can be used to demonstrate that the current proposed project would not exceed the impacts described in the 1998 HVSP FEIR. Using current Institute of Transportation Engineers (ITE) trip generation rates for single-family detached housing (ITE Land Use Code 210) and low-rise multi-family (ITE Land Use Code 220) to account for potential trips from the ADUs , Fehr and Peers estimated that the proposed project would generate 400 trips on Saturdays and 380 trips on weekdays. The proposed project is expected to generate a total of 26 trips during the AM peak-hour and 34 trips during the PM peak-hour, as shown in Table 4 below.