2002-081-RES ACCEPT PROPOSAL OF FREESE & NICHOLS FOR PROFESSIONAL ENGINEERING SERVICES FOR PRODUCTION STUDY OF WATER TREATMENT OF COP

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C. Why did the District Participate in the Program? The Texas Optimization Program is completely voluntary. The District saw the program as an opportunity to assess the treatment plant's capability to meet the proposed more stringent enhanced surface w.ater treatment rule and disinfection by-products regulations. The goal of the program is to reduce the risk of waterborn diseases such as Cryptosporidium and Giardia. The District felt that by taking this pro-active stance that it would gain valuable insight into projecting future capital and operating expenditures to meet the new regulations. The District also has established a leadership role in the region's water utilities community. The District is considered a technical resource by many of the region's water utilities and is often approached by the regulatory agencies to pioneer new water programs. None of this activity would be possible without the foresight and support of the District's Board of; Directors and administrative staff The District's recognition of the benefits for pro-active' planning is an essential part to any successful program or utility operation. As a last, yet very significant, point is the plant's operating staffs desire to achieve the very challenging and demanding performance criteria from the Texas Optimization Program. Without the commitment and support of the Board of Directors, the administrative manage~~nt, the plant operating staff, and regional water utility supporttbis program would not have been possible. II. BACKGROUND A. Facility Design Features The West Water Treatment Plant was constructed in 1985 and is rated by the Texas Natural Resource Conservation Commission as a 10 MGD plant. The facilities consist ofa terminal storage reservoir for pre-settling, a rapid mix unit for chemical mi'ring, tWo-stage flocculation ~ with variable speed drive units, sedimentation basin with tube settlers for enhanced settling, variable declining rate filters with air assisted backwash, multiple disinfection zones and baffled clearwell for enhanced disinfection contact time. Figure 3 shows the facility layout. Figure 3: Facility Layout r----------------------------l I I I I I I I I I I I I I I I I I I I I I I L____________________________J ; I I II tIel ,. I~ I~ U'fI -l'('. 'II(..,.......~ -!'. There are several unique features relating to the design of this facility. Figure 4 depicts these features. They include the following: