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Water Conservation Plan SECTION 3 PROPOSED FACILITIES Section 3 describes the improvements planned for the system and their associated costs. The planning forecast for the proposed facilities is 20 years. 3.1 POTENTIAL FACILITY NEEDS The Authority is planning to build improvements for its water and wastewater systems that include a new water treatment plant, an increase in the size of its non-potable water system, the implementation of an alluvial recharge system, and an upgrade and expansion of its wastewater treatment plant. Information in this section was tal(en from previous master plans and from projections developed in the planning for the JWPP and the L TCWRF. Cost information for the projects that are discussed below is provided in Worl(sheet 3-1 (Appendix A). ACWW A is planning an indirect potable reuse system to serve their community and implementing a non-potable irrigation system in areas of new development. The JWPP will increase the Authority's water supply and reduce reliance on deep groundwater, thus extending the life of the nonrenewable resource. There are several components of the JWPP, the Joint Water Purification Project Water Treatment Plant (JWPPWTP), the alluvial recharge system, and the non-potable water system. 3.1.1 Joint Water Purification Project Water Treatment Plant Following construction of the JWPP, water will be supplied to the Authority from both alluvial and non-tributary wells. Alluvial well water will be treated at the JWPPWTP prior to pumping into the Authority's distribution system, while non-tributary water will be chlorinated and pumped directly into the distribution system. The JWPPWTP is being constructed primarily out of necessity to improve the potable water supply for the ACWW A customers. The JWPPWTP will also serve as a l(ey component of the planned indirect potable reuse system (see below). Treatment processes at the JWPPWTP will include cartridge filters, reverse osmosis, advance oxidation, air strippers, and disinfection with chlorine. The treatment processes were selected to provide a positive barrier, and in some cases multiple barriers, to contaminants that may be in the raw water due to influence from upstream dischargers and the alluvial recharge system. The JWPPWTP is currently in the design phase and Phase I of the project is expected to complete construction in 2008. Phase I of the project will provide a capacity of 4.6 mgd for ACWW A. Phase II of the project will expand the JWPPWTP capacity to 7.6 mgd for ACWWA. ACWW A is planning to construct an alluvial recharge system as part of the indirect potable reuse system. The recharge system will allow ACWW A to secure their existing water supply. Treated wastewater effluent from the L TCWRF would be pumped upstream of the Authority's wells that are along Cherry Creel( and injected into the alluvium. The effluent would then travel through the alluvium where natural purification and mixing with native water would occur before the water is re-pumped by ACWW A's raw water extraction wells. It is anticipated that the November 2006 17 Richard P. Arber Associates, Inc.