Planning Commission Agenda Packet 102225 (1)

August 7, 2025 Page 3 BKF ENGINEERS 4. Site Access Existing site access is provided from Willow Road, a driveway along Owens Drive, and the Bart Station Access Road. There is additional pedestrian access from Iron Horse Trail and from the walkway to the Dublin/ Pleasanton BART Station to the north. Future access to the site will likely need to maintain the existing pedestrian access through the site to the BART Station and Bus / Taxi access to pick up / drop off areas. The primary fire access will be provided along Owens Drive. Secondary fire access may be required from fire lanes within the site. California Fire Code Appendix D (adopted in the City of Pleasanton Code of Ordinances section 20.24.010) requires that buildings that are more than 30 feet tall be provided with aerial fire apparatus access, consisting of a 26 foot wide road located between 15 and 30 feet from the building, positioned parallel to one entire side of the building. Owens Drive could serve as an aerial apparatus access road, depending on the building location. 5. Flood Zone The site is located within FEMA Flood Zone X, 0.2% Annual Chance Flood Hazard. Hewlett Canal and Chabot Canal, which are located adjacent to the site, are located in Zone AE, floodway areas. Floodway areas must be kept free of encroachment so that the 1% annual chance flood discharge can be contained in the channel. Base flood elevations in the canals vary from 328 to 331 in the areas adjacent to the site. The site’s Flood Insurance Rate Map (FIRM) is included as Appendix A. The building finished floor elevation should be located above the base flood elevation of the adjacent canals. The building finished floor elevation should also be higher than the elevation of the upstream sewer manhole and the crown of the street. 6. Grading Once the development scenarios are provided to BKF, we will prepare an analysis of any grading considerations for the site. 7. Water System The water system is owned and operated by the City of Pleasanton. Record drawings indicate that there is a 16-inch DIP water main in Owens Drive and an existing 10-inch DIP water main that runs north-south through the site. An existing 16-inch DIP water service enters the site on the west side, and an existing 10-inch DIP water service enters the site on the east side. Additionally, there is a Zone 7 owned pipe that runs through the site along the alignment of the Iron Horse trail. Zone 7 is a water wholesaler in the county. There are 4 existing fire hydrants along the property frontage on the north side of Owens Drive. There is one existing fire hydrant within the property near the retail kiosks. Refer to Appendix B for the water maps provided by the City of Pleasanton. Initial domestic water demand is estimated to be 390,000 gpd (based on 1,300 units and 300 gpd/unit consumption). 300 gpd water consumption estimate is based on 2005 Pleasanton Plan 2025 for multi family use. Fire flow demand will be based on the gross building area and construction type for the building. Once development scenarios that include gross building area and construction type are provided to BKF, we will prepare an estimate of the required fire flow. The city has provided a fire flow analysis dated May 2025, which is included for reference in Appendix B. The fire flow analysis shows that the city’s system can provide a fire flow of 5,408 Gallons per Minute (GPM) at an on-site hydrant while maintaining the minimum residual pressure of 20 psi, but that this flow results in velocities in the main above the maximum velocity of 10 feet per second (fps). When velocities are constrained to 10 fps maximum, the on-site hydrant can produce a maximum fire flow of 2,447 GPM. Since the city’s modeling assumed all fire flows would be provided from a single point on the project site, the city system may be able to supply a higher fire flow while maintaining the maximum required velocity if multiple connection points are used. If DRA F T