WATER REUSE &DESALINATION1155 WasteReuse6x9:LayoutBRIGHT AS THE FLORIDA SUN1 7/23/07 6:06 PM Page 1OURCOMMITMENT…OURPASSION…FORWATERIS CLEAR.©2007 Carollo Engineers - 1155Want to WorkWonders with Water?If you're passionate about water, youcan make a difference and grow yourcareer with Carollo. To learn more, visitworkingwonderswithwater.comWork that’s worth it…where everydayis a new opportunityto make a difference,“Working Wonders With Water.” For 75 years, Carollo has been the leader inwater-focused engineering, partnering with clients to develop innovative watertreatment solutions that support environmental stewardship and sustainability.With 25 offices in 11 states, Carollo remains committed to that one focus—workingto help solve our clients’ toughest water and wastewater challenges everyday.1.800.523.5822 | carollo.com8
2007 <strong>WateReuse</strong> Award Winners<strong>WateReuse</strong> Projects of the Year – Largeand Mary Trail, Kennedy-Jenks ConsultantsIntegrated Water Reuse Management at City of Scottsdale,Arizona: The Water Reclamation Plant Expansionand Reuse Water Distribution System Water QualityImprovements Study (Scottsdale, AZ)Nominated by: Arizona Water Pollution & Control <strong>Association</strong>The City of Scottsdale’s approach to integrated waterreuse management is an innovative contribution to waterreuse and exemplifies a strong commitment to the environmentas well as unique and effective public–privatepartnering. In 2006, the City of Scottsdale achieved twomajor water reuse achievements: The first was achieving“safe yield” in compliance with the State of Arizona’sGroundwater Management Act, which defines “safeyield” as a long-term balance between water that is naturallyand/or artificially recharged to an aquifer andgroundwater that is pumped out. This milestone wasreached primarily by expanding the capacity of the city’swater reclamation plant and improving the advancedwater treatment (AWT) plant, both located at the ScottsdaleWater Campus. These enhancements allowed thecity to produce a greater volume of reclaimed water forrecharge, thereby reducing the city’s reliance on groundwater.The second water reuse milestone was the completion ofa Water Quality Improvement Study as a first step towardsalinity reduction in reclaimed water used for turf irrigationon 23.5 golf courses in Scottsdale. The increasinglevels of total dissolved solids (TDS) and sodium inreclaimed water have been a cause of concern for golfcourses in Scottsdale that use reclaimed water instead ofgroundwater for irrigation. The study was a collaborativeeffort between the city and golf course owners. The studyrecommended incorporating Scottsdale’s existing treatmenttechnologies at its AWT facility to reduce the TDSand sodium levels in the reclaimed water. The enhancementsto the Water Campus, being implemented to reach“safe yield,” allowed the city to institute the Water QualityImprovement Study. These two projects are proof ofScottsdale’s commitment to maintain the long-term sustainabilityof its water resources for its citizens.Redwood City Recycled Water Project (Redwood City,CA)Nominated by: Anita Jain, Whitley Burchett & AssociatesRedwood City, a community of 76,000 located 25 milessouth of San Francisco, CA, receives 100% of its watersupply from the Hetch Hetchy Regional Water System.Since 1998, Redwood City has been exceeding its contractualwater supply limit. After much planning, the firstgallons of recycled water began flowing to commercialcustomers in 2007. Redwood City’s Recycled Water Projectis expected to save approximately 900 acre-feet(about 300 million gallons) of drinking water annuallyby meeting significant irrigation and industrial demandwith recycled water by 2010. The project will help RedwoodCity meet its long-term water supply needs whileincreasing its overall supply reliability.Redwood City first began using recycled water on a trialbasis in 2000 with the South Bayside System Authoritywastewater treatment plant (SBSA) to deliver water tolimited area of Redwood Shores for landscape irrigationin areas such as median strips, and in common landscapedareas around some public and privately-ownedbuildings. After two successful years, the City Councilbegan planning for the development of a large-scale recycledwater system to address not only the currentover-use of the limited water supply, but the likelihood ofsevere water shortages in coming years.After a great deal of community-involved deliberation,the City Council approved an agreement with SBSA forthe large-scale production and delivery of recycled water,and moved forward with the final design of new treatmentfacili-ties at SBSA. The city also began design of anexpanded recycled water distribution system thatincludes Redwood Shores, the “Greater Bayfront Area,”and many sites in the Seaport Area where the water willbe used to irrigate commercial landscapes and for a varietyof industrial purposes.Today, the system is providing water to its first customers,and is designed with the flexibil-ity to accommodate newopportunities and new customers. In the event of adrought, the recycled water will be even more importantto the community of Redwood City, both for today andfor the generations to come. By reusing treated water, thecity greatly reduces the amount of non-salt water thatSBSA will discharge to the San Francisco Bay, which is9
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