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� A�� City of Redwood City Rceycled W ater Task Force Report March 3, 2004 3.1.1. Recycled Water The recycled water category consists of (a) realignment of the recycled water piping proposed under Alternative E and (b) adding dua� plumbing to the new Downtown Cinema and providing recycled water to the Downtown Cinema for appropriate indoor and outdoor use. 3.1.1.1. Reali�nment of Recycled Water Pioing Under Alternative TF, the recycled water piping proposed under Altemative E is realigned (a) to remove piping serving schoolyards, parks, and playgrounds and (b) to add piping to serve City Hall, City-owned planters on Broadway, and Kaiser. Information provided by Kennedy/Jenks Consultants regazding the realigned recycled water piping is presented in Attachment 2. Removing schoolyards, parks, and playgrounds from Altemative E results in a loss of approximately 289 AF/Y from the 1,946 AF/Y of recycled water to be delivered under Altemative E. Adding City Hall, Ciry-owned planters, and Kaiser adds approximately 30 AF/1'. Thus, the realigned piping for Alternative T'F delivers 1,687 AF/Y of recycled water, which results in an equivalent amount of potable water demand reduction. Removal of the piping serving schoolyazds, pazks, and playgrounds provides significant cost savings over AlternaUve E; while the cost of adding pipe to serve City Hall, City-owned planters, and Kaiser is relatively moderate. The new alignment reduces the length of pipe (mostly 24 inches in diameter) in the Cenual Redwood City azea by about 1.25 miles, as compazed to Alternative E. The revised alignment also eliminates the need for three jack-and-bore crossings, which further reduces the cost of the pipeline relative to Altemative E. Consequendy, the realigned recycled water piping for Alternative TF costs approximately $5,100,000 less than Alternative E. 3.1.1.2. Downtown Cinema Dual Plumbine Under Alternative TF, the Task Force proposes that dual plumbing be installed during construction of the new Downtown Cinema so that recycled water can be used for appropriate indoor and outdoor use at this location. Examples of appropriate use include irrigation and toilet flushing. Based on projections of water use at the Downtown Cinema, it is estimated that 23 AF/Y of recycled water could be used at this location, with a commensurate reduction in potable water demand. City staff has approached the developer of the Downtown Cinema about the possibility of installing dual plumbing at this location. The developer estimates that dual plumbing will cost an additional $100,000 in design and construction costs at this late design stage. The developer would expect to be compensated for these costs if the City were to request the dual plumbing. An estimated additional $]00,000 would be required to install recycled water pipe to serve the Downtown Cinema. Thus, the estimated cost of this option is $20Q000. Page 4 of 12