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8,A13 Kennedy /Jenks Consultants Memorandum Peter Ingram, Uty of Redwood City 21 February 200 Page 2 • Grant funding would be available ($3.3M) from the State Water Resources Control Board under authorization from Proposition 50. Alternative D maximized the cost efficiency of the recycled water project and achieved water supply objectives, while being implemented in an orderly fashion from the South Bayside System Authority (SBSA) treatment plant westward through Redwood Shores and then into the Greater Bayfront area — keeping the entire new infrastructure east of Highway 101. The system also included significant flexibility to be modified and expanded in the future, while avoiding significant distribution system costs associated with expanding the system across the Bayshore Highway 101 into the Central Redwood City area. Project Refinement Objectives and Methodology Because existing landscape irrigation meters for common areas of Homeowner Associations (HOAs) in the Redwood Shores area will not be required to connect to the new system via a mandatory recycled water use ordinance, it is assumed that some HOAs will not participate in a recycled water project. Based on recent public meetings and additional market research performed by the City, HOAs appear to respond differently based on their "levels of sensitivity" with the potential use of recycled. Sensitivity is based on residents' proximity to irrigation systems, especially in front yards, perimeter areas and common areas. Figure 1 depicts the HOAs in Redwood Shores and their relative levels of sensitivity to recycled water use for landscape irrigation. The sensitivity levels are described as follows. Sensitivity Level 1 - has the highest sensitivity, and generally includes irrigating the "front yards' and common areas in 60% or more of the single family homes in the HOA. For these developments, "front yards" are not typical of most single family detached homes, in that the landscape and irrigation system are owned by the homeowner's association. Sensitivity Level 2 - is moderately sensitive, does not include front yard irrigation, but has common area landscaping in Condominium and Apartment type developments. Sensitivity Level 3 - is the least sensitive and also does not include front yard irrigation, but has very little outdoor water use in the common areas of Condominium and Apartment type developments. The sensitivity information is used to determine how much water supply is likely to be lost under Alternative D by not adopting a mandatory use ordinance for recycled water use. The following assumptions were used to develop the demand scenario for new Alternative E. 1. None of the HOAs with Sensitivity Level 1 (most sensitive) would voluntarily enlist in the recycled water program. 2. 50% of HOAs with Sensitivity Level 2 would voluntarily enlist in the recycled water program. D �Y'"' WquW Zb205]9 00 we w p"p•n •ipM t". N'OY053B @ w pgetl hoYYM 1�i•n•11(YMI•tl r•I W M IIIIIIU 111Y � tltw W Yd.Ex