ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

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► comply with current water quality standards and provide flexibility to address changes in standards and regulations; and ► be sensitive to community concerns in relation to the planning, design,construction, and operation of City WQCF and collection system facilities and programs. 2.3.3 ELEMENTS OF THE PROJECT The project would expand WQCF treatment capacity from 9.87 million gallons per day(mgd)to 27 mgd average dry weather flow(ADWF),would construct new trunk sewers to accommodate growth planned for in the City's general Plan(adopted in 2003), and would construct a new recycled water distribution system. The project would result in the construction of treatment facilities to achieve compliance with water quality limitations including rapid mixing and flocculation tanks to address turbidity requirements and a tertiary ultraviolet(UV) light disinfection treatment system to address wastewater reuse requirements. The proposed project would reach buildout via a two-phase,incremental expansion,with capacity increasing from 9.87 to 17.5 mgd ADWF in the first phase, and then from 17.5 to 27 mgd ADWF in the second phase. The proposed increase in capacity would be accommodated using the City's long-term effluent disposal strategy of on-site land application,urban landscape irrigation, and San Joaquin River discharge. The proposed project would also include the incremental construction of three new trunk sewers and improvements to the collection system. 2.3.4 SUMMARY OF ALTERNATIVES TO THE PROJECT This EIR evaluates the following alternatives to the project: ► No Project Alternative(9.87 mgd) ► Increased Land Disposal Alternative ► Advanced Wastewater Treatment Alternative ► Modified Pipeline Alignment Alternative The No Project Alternative and the Modified Pipeline Alternative are environmentally superior to the project. The Advanced Wastewater Treatment Alternative would result in environmental tradeoffs compared to the project. The Increased Land Disposal Alternative would not be environmentally superior to the project. The No Project Alternative would not attain any of the project's objectives. The Modified Pipeline Alternative would attain all of the project's objectives. NO PROJECT ALTERNATIVE (9.87 MGD) Under the No Project Alternative (9.87 mgd),the 2007 WQCF and 2006 collection system master plans would not be implemented, and discharge at the WQCF would not exceed the currently permitted discharge rate of 9.87 mgd. The WQCF would be projected to accommodate increased urban growth in the City service area for the next 5-10 years depending on the buildout rate of proposed development, at which time the average dry weather flow (ADWF) discharge from the WQCF is projected to reach the plant's currently permitted ADWF capacity of 9.87 mgd. Under this alternative,WQCF discharges would be"capped"at 9.87 mgd ADWF, and growth in the City's service area would be constrained. Plant improvements needed to address regulatory requirements, ongoing maintenance needs,or technical upgrades(including buildout of the WQCF)would still be implemented,but capacity would not be increased above 9.87 mgd. If the No Project Alternative were implemented, other options would need to be considered to address the wastewater treatment demands associated with future development in the City's service area. Because any discussion of the size, location, and infrastructure requirements of a potential new wastewater treatment plant would be speculative, a potential new plant is not discussed in this alternative analysis. EDAW Manteca WQCF and Collection System Master Plans EIR Executive Summary 2-2 City of Manteca