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W OnARa &CURRAN conveyed through the recycled water system to storage ponds and sprayfields, where the treated water is used for irrigation. Wastewater generated in the areas east of 1-5 and north of Louise Avenue is conveyed to the MWQCF. Most of the City's wastewater generated east of 1-5 in the Historic Lathrop area is conveyed via gravity sewers and lift stations to a regional pump station,the 0 Street Pump Station.The 0 Street Pump Station then conveys wastewater via a 12-inch diameter force main to the MWQCF. This 12-inch-diameter force main also conveys wastewater from the McKinley Avenue Pump Station,the LAWTF Pump Station, and other private stations that serve the industrial areas east of the 1-5 to the MWQCF. In 2015, 1,043 AF of wastewater was collected from the City's service area and conveyed to MWQCF. Wastewater generated in the Crossroads industrial area and areas west of 1-5,including the River Islands development, is conveyed to the Lathrop CTF.Currently,wastewater from the Central Lathrop Specific Plan(CLSP)and River Islands development areas is conveyed to the Mossdale Pump Station via the CLSP Low Storm and Sewer Pump Station and the River Islands Interim Pump Station, respectively. The City plans to expand the CLSP pump station and is constructing a new River Islands Pump Station to convey wastewater from these development areas directly to the Lathrop CTF as development proceeds. The new River Islands Pump Station is expected to be completed in 2020. In 2015,429 AF of wastewater was collected from the City's service area and conveyed to Lathrop CTF for treatment and reuse. This value was approximately 840 AF in 2018. Several large industrial facilities (e.g., Simplot, a former Li bbey-Owens-Ford glass plant facility, Sharpe Army Depot, and former Carpenter Company facility) manage their wastewater onsite.5 California Natural Products manages the majority of their wastewater and sends the remaining flows to either the J Street Lift Station or the McKinley Avenue Pump Station. The City's two collection systems are connected by the Mossdale Intertie,which crosses beneath 1-5 on River Islands Parkway and Louise Avenue. The intertie is not routinely operated but could potentially be utilized in the future to reroute Lathrop CTF influent to the MWQCF to improve system efficiency and cost effectiveness. 2.1.3.1 Manteca Water Quality Control Facility(MWQCF) The City owns 14.7 percent of the MWQCF capacity by contract with the City of Manteca. However,the City does not participate in the operation of the plant nor does it receive recycled water from the MWQCF. Disinfected tertiary effluent is discharged to the San Joaquin River.A portion of the secondary effluent is used to irrigate crops owned by the City of Manteca. The current MWQCF design capacity is 9.87 million gallons per day (MGD) and the City's allocated capacity is approximately 1.45 MGD (Lathrop, 2016). The MWQCF is permitted for future expansions of up to 26.97 MGD,of which the City would be allocated up to 3.97 MGD,should the City elect to maintain its proportional allotment. However, the City of Manteca does not have near-term plans to expand the capacity of the MWQCF. 2.1.3.2 Lathrop Consolidated Treatment Facility(Lathrop CTF) Daily operation of the Lathrop CTF is contracted to a private contractor,Veolia Water North America. In August 2015, the City began diverting wastewater from the Crossroads area to the Lathrop CTF and decommissioned the adjacent Crossroads wastewater treatment facility(WWTF). In Summer 2018, the City completed a Phase 2 Expansion of the facility to a total capacity of 2.5 MGD Average Dry Weather Flow (ADWF) to accommodate future growth in the 5 The former Libbey-Owens-Ford glass manufacturing facility has been modified into a typical industrial facility and is in the process of removing its private wastewater treatment facility and connecting to City sewer services.The Sharpe Army Depot is in the process of being sold as excess property.The City of Lathrop will soon provide water and sewer service to the site,and the existing wastewater treatment facility will be removed. Califia(0011533.00) 20 Woodard&Curran, Inc. River Islands Phase 2 Development Water Supply Assessment September 2020