AgdaPkt 2009-07-13 clsd and jnt - Laserfiche WebLink

Browse Search

.....~ =a.' Bkf EN.GI'NEERS. SU.RVEYO~. PLANNERS 1650 Technology Drive Suite 650 San Jose . California 95110 phone 408.467.9100 fax 408.467.9199 www.bkf.com 6.1E Page 16 ATTACHMENT TWO May 21,2009 Mr. Paul Willis, P.E. Senior Civil Engineer City of Redwood City 1017 Middlefield Rd Redwood City, Ca 94063 Subj ect: Stanford in Redwood City - Anticipated Water Demands Dear Mr. Willis: In keeping with our recent discussions with Chu Chang and Phong Du, this letter provides the revisions to the water delnand estimates for the Stanford in Redwood City project that Redwood City has requested. The attached tables, as directed by City staff, provide estimated pre- and post-development water usage for the project, including irrigation usage. As shown in Tables 1A-1D, using the City's water demand rates, the total pre-development water usage (including indoor areas, landscaping, and fountain water demands) is estimated at approximately 51,060 gallons per day (gpd). This total amount is calculated using existing building square footages, landscaped areas, and fountain sizes. Based on the existing buildings' type of use (as described in the 1996 Midpoint Technology Park EIR) and the City's CUlTent zoning, the project applicants believe that the existing water demand should be based on a research and develoPlnent water denland rate. However, as specifically directed by the City, the existing water usage was estinlated using an "office" water denland rate of 0.06 gpd per square foot (gpd/sf). As directed by the City, the sanle demand rate of 0.06 gpdlsf was used to estimate water usage for new office uses as part of the project. We understand that this rate is based on the outcome of recent water demand evaluations conducted by the City. As further directed by the City, all other water demand rates were based on the City's "Attachment Q." Using these water demand rates, the total post-development water usage (including indoor areas and landscaping) is calculated to be approximately 236,120 gpd, as shown in Tables 2A-2C. As documented in the previous submission to the City in March 2009, the project applicants finnly believe that the project would use significantly less water than this amount, due to water-saving fixtures and conservation, especially since the majority of the project will be constructed under new more water-restrictive building codes that come into effect in 2012. However, the applicants have prepared the attached estimates at the direction of City staff. Because Redwood City plans to implenlent a citywide recycled water system, the attached tablesil1cIllde ananalysis that assumes the proposed project's eventual use of recycled water. Specifically, the City originally requested three different options for the use of potable and recycled water, and these options are shown in Tables 3A-3C. These options include: A) B) C) Potable water for all water use, Table 3A. Recycled water for irrigation only, Table 3B. Recycled water for toilet flushing and irrigation, Table 3C.