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A WDODARR &CURRAN 2.1.1.2 SCWSP Deliveries The SCWSP is a partnership between SSJID and the cities of Lathrop, Manteca, Tracy, and Escalon for the cities to acquire, by purchase, treated water up to the amount specified as a project allotment in the 1995 Water Supply Development Agreement.' The City finances delivery of this supply by way of its adopted budget. The SCWSP was planned to be implemented in two phases. Phase I was completed in 2005 and consisted of an intake facility at Woodward Reservoir, the Nick C. DeGroot Water Treatment Plant (DGWTP), and about 35 miles of pipe ending in the City of Tracy.The DGWTP is located near Woodward Reservoir in San Joaquin County,and the treatment process at the facility includes pre-chlorination, coagulation, dissolved air floatation pretreatment for removal of solids and dissolved material,chemical stabilization to minimize internal pipe corrosion, membrane filtration,and chlorination for disinfection. The total Phase I capacity of the SCWSP is approximately 31,500 AFY. Phase II is anticipated to increase the treatment capacity of the DGWTP to approximately 43,000 AFY. SSJID has experienced increased demand in recent years and is exploring options to extend the distribution system constructed in Phase I and potentially expand treatment capacity as part of a Phase II project, but the schedule for these expansions remain uncertain (Provost&Pritchard,2016). The 1995 Water Supply Development Agreement(WSDA) between the City and SSJID, as well as the year 2000 and August 2020 amendments to the WSDA, provides the City with a Phase I allocation of 8,007 AFY and a total allocation of 11,791 AFY after completion of Phase 11. In August 2013, the City sold 1,120 AFY of SCWSP water to the City of Tracy.2 Therefore, the City's remaining SSJID allocation is 6,887 AFY for Phase I and a total of 10,671 AFY after completion of Phase 11. Each of the four participating cities has an agreement with SSJID to receive treated water through December 2029. If SSJID and the cities do not agree to extend the contract past 2029, SSJID agrees to transfer the project to a Joint Powers Authority composed of the four cities which would then be responsible for operation and maintenance of the SCWSP. Section 2.3.1.1 discusses future uncertainties in available surface water supply as a result of ongoing planning efforts by the State Water Resources Control Board (SWRCB). The SCWSP transmission system has been designed to deliver seasonal peak flows to each City through a transmission pipeline to turnout facilities. The transmission system is currently operated by gravity flow. In SCWSP Phase 11,a treated water pump station will be installed at the DGWTP to deliver pumped flows.The SCWSP will deliver flows to Lathrop at two locations: the existing turnout at Lathrop Road, east of McKinley Avenue (Lathrop SSJID Turnout 1), and a turnout in the River Islands area off Golden Valley Parkway, west of Stewart Road and west of Manthey Road (Lathrop SSJID Turnout 2). The second SSJID turnout in the River Islands area is currently under construction and is expected to be completed in early 2021. The City also has an intertie with SSJID near the Tracy Pump Station,which is currently in operation.The intertie is located near the intersection of Stewart Road and Manthey Road.The planned capacity of each is provided in Table 5. The City of Escalon is under contract to purchase water from SCWSP but has not yet constructed a pipeline to convey that water to its facilities(EKI,2017). 2"Lathrop-Tracy Purchase,Sale and Amendment Agreement,"dated August 6,2013. Califia(0011533.00) 12 Woodard&Curran, Inc. River Islands Phase 2 Development Water Supply Assessment September 2020