14 ATTACHMENT 1 EXHIBIT A - Laserfiche WebLink

Chapter 6 Water Supply Characterization THE CITY OF PL£ASANTON • EBMUD owns and operates the recycled water distribution pipeline system contained within its service area and will have two pump stations and a reservoir (future facilities). • DSRSD owns and operates the recycled water treatment facilities at its wastewater treatment plant that treat wastewater from Dublin, South San Ramon and the City, and the recycled water distribution pipeline system within its service area, along with three pump stations, R300A, R300B, and R20, and two reservoirs, R20 and R300. The City connects to the DERWA system near the corner of the DSRSD Dedicated Land Disposal site, adjacent to Stoneridge Drive near the DSRSD RWTF. 6.2.5.1.2 Livermore Water Reclamation Plant The LWRP can produce up to 6.0 MGD, or approximately 18 AF per day of recycled water. In 2020, the LWRP produced approximately 2,470 AF of recycled water, with 2,180 AF used within the Livermore Municipal Service Area. 6.2.5.2 Wastewater Collection, Treatment, and Disposal DSRSD's RWTF and the LWRP both provide wastewater collection and treatment services for the City's service area. Treated wastewater from both facilities are sent through the Livermore Amador Valley Water Management Agency (LAVWMA) pipeline for ultimate disposal by the East Bay Dischargers Authority (EBDA) in the San Francisco Bay. The wastewater collection and treatment systems at DSRSD's RWTF and the LWRP are described below. 6.2.5.2.1 DSRSD's Regional Wastewater Treatment Facility (RWTF) DSRSD owns and operates the RWTF, which treats wastewater from Dublin, South San Ramon, and the City. The RWTF includes conventional secondary treatment facilities, as well as tertiary and advanced recycled water treatment facilities. Conventional secondary wastewater treatment facilities include primary sedimentation, activated sludge secondary treatment, secondary sedimentation, chlorine disinfection, and effluent pumping. The secondary treatment facilities currently have an ADWF capacity of 17.0 MGD. At projected buildout, the secondary facilities will have an ADWF capacity of 20.7 MGD; 10.4 MGD of this influent is projected to originate from the DSRSD service area. The remaining 10.3 MGD of influent is projected to originate from the City. DSRSD treats City influent by contract. At DSRSD's RWTF, a portion of the secondary effluent is treated further to produce Title 22 disinfected tertiary recycled water. During the dry season when recycled water demands are high, recycled water is produced using sand filtration and ultraviolet disinfection facilities (SFUV), which have a treatment capacity of 16.2 MGD. DSRSD's RWTF also includes microfiltration and ultraviolet disinfection facilities (MFUV) with a treatment capacity of 3.0 MGD. These facilities currently act as backup facilities for the SFUV facilities and are used during times of low and high demands. The SFUV facilities have less flexible startup and shutdown requirements, whereas the MFUV facilities have a wide turndown range; therefore, they are used during low flow periods. During high demand periods, the SFUV facilities are used, with the MFUV facilities serving as backup when units in the SFUV facilities are undergoing maintenance, repair, or replacement. DSRSD's MFUV facilities were designed to produce recycled water suitable for both non -potable reuse and groundwater recharge, a potential future use that would replenish and improve local groundwater WEST YOST 6-17 City of Pleasanton 2020 Urban Water Management Plan N-e80-60-20-04-wP-a-680-2020uwMP May 2021