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For Phase 1 , a small office, laboratory, and restroom will be included in the treatment building. Eventually, an office building covering approximately 2,400 ft2 will be constructed. Depending on the outcome of the interim and long-term Enhanced Surface Water Treatment Rule (ESWTR) and the Disinfection/Disinfection Byproducts Rule (D/DBP) presently being evaluated by EPA, ozonation with contact time provided in the raw water pipeline, and granular activated carbon provided in 8-foot diameter by 40-foot long contact tanks may have to be added in a subsequent phase as the treatment system. Storage Initially, one welded steel storage tank with a diameter of 177 feet and a peak height of 30 feet will be located at the water treatment plant site. One or two additional identical tanks will be constructed in subsequent stages. Additionally storage facilities should also be located offsite for improved reliability in the event a distribution main must be taken out of service for repairs. The vegetative screen provided inside the plant fence will shield the tanks from view. Effluent Pump Station The pumps that will boost water from the tank into the distribution system will be housed in a block building approximately 30 feet wide by 70 feet long by 20 feet high. The pump station will also house the emergency generator. The building will be screened from view by the vegetative screen, and will also designed for sound attenuation. Sludge Minimal amounts of sludge consisting principally of colloidal clays will settle out in the recessed backwash ponds/drying beds located between the treatment building and the wetlands located on the northwest side of the plant. Small quantities of sludge will be periodically scrapped from the bottom of the ponds and stockpiled in small mounds within the plant fence. The material is inert, safe, and free from odors. As additional sludge is produced as the treatment plant is expanded, the sludge will be blended with native soils and used for fill throughout the project area. The sludge results from colloidal materials removed in the treatment units and backwashed into the backwash ponds. Initially, the backwash water will evaporate or percolate into the groundwater. As treatment plant flows increase, settled backwash water will be reclaimed and used for irrigation within the plant, and perhaps used to enhance the wetlands on the northwest side of the plant. -3-