July 30, 2003 News Release Scoping meeting set August 6 for Carnation wastewater treatment plant Four alternative systems for treating and discharging Carnation's wastewater will be explored as King County and the City of Carnation host a public environmental scoping meeting August 6, 6:30 p.m., at Carnation Elementary School, 4950 Tolt Avenue. The purpose of the scoping meeting is to give people the opportunity to offer opinions about the alternatives, potential impacts, and possible mitigation measures that should be considered in an environmental impact statement, or EIS. Carnation has contracted with King County to design, build and operate a new wastewater treatment system. The city has decided that replacing individual septic tanks with a wastewater treatment plant is an important step toward the long-term viability of Carnation. The new treatment system will protect public health and water quality. When it opens in 2006, the plant will treat from 250,000 to 500,000 gallons of wastewater per day. The plant will be sized to serve the city as defined by Carnation's comprehensive plan and designated urban growth area. The county and city have identified potential sites for building the treatment plant and discharging treated wastewater: two alternative sites for the plant and two alternatives for discharging the treated effluent. Both discharge alternatives would work for the alternative plant sites: Alternative 1A includes a plant site west of the business district and state Highway 203 on city-owned property at the end of Entwistle Street. It would discharge highly treated wastewater from a new outfall in the Snoqualmie River. Alternative 1B includes the plant site at Entwistle Street. It would discharge highly treated wastewater by filtering it through soil into groundwater. That method is called upland discharge. Alternative 2A includes a plant site in the area now used for concrete fabrication east of the Carnation Fire Station and state Highway 203. It would discharge highly treated wastewater through the new river outfall. Alternative 2B includes the plant site near the fire station. It would use upland discharge to filter highly treated wastewater through soil into groundwater. The proposed river outfall is north of Northeast Carnation Farm Road and southwest of Carnation-Duvall Road Northeast (State Route 203) where the river bends from north to west. A pipeline to the outfall could run north along the Snoqualmie Valley Trail. The outfall would include a partially buried 8-inch-diameter pipe extending into the river channel. The proposed study area for upland discharge is southeast of Carnation in unincorporated King County. The study area contains five sites south and east of the closed Carnation landfill between Northeast 24th and Northeast 20th streets. A pipeline to the site could run south along the Snoqualmie Valley Trail. About five acres are needed for the plant and another 10 acres for the upland discharge alternatives. One element of the public involvement program is a citizens advisory committee. Representing a range of interests, the 14-member committee is already providing advice and comment on siting criteria and options. Examples of site selection criteria include land-use compatibility, geographic considerations (for example, closeness to planned sewers), technical feasibility, and environmental impacts. After the environmental scoping process in August, two or three alternatives will be selected for detailed evaluation in the draft EIS. King County will draft the EIS and release it this fall for public comment. Comments on the draft EIS will be addressed in the final EIS, scheduled for release next summer. The county, in consultation with the City of Carnation, will then select the final system. System design and permitting is scheduled for 2004 and 2005. Construction is tentatively scheduled for 2005 and 2006. For information on the treatment plant, contact King County's Carnation Wastewater Treatment Plant Project Information Line at 206-263-5212 or toll-free at 1-800-325-6165, ext. 35212. Or send an e-mail message to CarnationWWTP@kingcounty.gov, or check the project Web site. For information on the local sewage collection system, contact Jim Dorsey, director of public works for the City of Carnation, at 425-333-4192. King County's wastewater treatment utility protects public health and water quality by serving 18 cities, 15 sewer districts and more than 1.4 million residents in King, Snohomish and Pierce counties. Related Information Wastewater Treatment Division Facts at a glance about our wastewater system News Releases

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