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8�-qfl City of Redwood City Recycled Water Task Force Report March 3, 2004 1. EXECUTIVE SUMMARY The goal of the Recycled Water Task Force ("Task Force") is to identify 1,946 acre-feet per year ("AF/Y") of potable water demand reductions by 2010, in a financially feasible manner, that avoids using recycled water at schoolyards, parks, and playgrounds. The Task Force has achieved this goal and unanimously makes three recommendations to the City of Redwood City ("City") City Council. First, the Task Force recommends that the City implement Alternative TF, as summarized in Table 1 and Section 3.1. Through a combination of recycled water use, replacement of natural turf playing fields with synthetic turf, continued use of groundwater at Sequoia High School, and additional water conservation programs, Alternative TF achieves an estimated 2,002 AF/Y of potable water demand reductions at an estimated cost of $14,000 more than Alternative E. Considering the margin of enor in the estimated $43,600,000 capital cost for Alternative E, the cost difference between Alternatives E and TF is negligible. Therefore, the Task Force considers the costs of Alternatives E and TF to be essentially the same. In addition, implementation of Alternative TF will allow increased utilization of the City's playing fields. Option Potable Water Cost Cost Efficiency Demand Reduction ($) ($/A►F/Y) AF Alternative E 1,946 43,600,000 22,405 Alternative TF 2,002 43,614,000 21,785 Second, the Task Force recommends that the City investigate and/or implement Other Potential Measures ("OPMs") 1 through 10, which will likely result in additional reductions in potable water demand. This recommendation is made to give the City additional flexibility to meet future potable water supply demands. The OPMs are listed below and detailed in Section 3.2. 1) Further Investigate Potential Use of Groundwater 2) Consider a Commercial Toilet Replacement Program 3) Promote Conservation 4) Adopt an Ordinance to Implement Conservation Measures 5) Consider Requiring Low-Flow Urinals in New Construction 6) Consider Requiring Conservation Devices in New Construction 7) Evaluate Incentives for Electronic Eye Faucets 8) Investigate Potential Water Swaps with Other Potable Water Conveyors 9) Evaluate Emerging Automated Landscape Irrigation Technology 10) Evaluate Emerging Treatment Technology Third, the Task Force recommends that City staff prepare annual reports, for City Council and public review, on their progress toward implementing the first two recommendations of the Task Force.