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• <br /> SEPA ENVIRONMENTAL CHECKLIST FOR <br /> Beverly Park Switching Station Expansion AGENCY <br /> P.U.D. NO. 1 of Snohomish County USE <br /> 2) What types and levels of noise would be created by or associated with the project on <br /> a short-term or a long-term basis (for example: traffic, construction, operation, <br /> other)? Indicate what hours noise would come from the site. <br /> • Short-term equipment noise will be from construction. The construction <br /> activities will generally be limited to the hours between 7 a.m. and 7 p.m. <br /> Monday through Friday, excluding holidays. <br /> • The 230kV-115kV transformers will be a sound source. Typically the sound <br /> consists of an audible low intensity "humming" and air circulation from <br /> cooling fans. This sound is related to the level of electrical load on the <br /> transformer and can occur at any time. High-efficiency, low sound level <br /> transformers will be specified for the project. <br /> • The project will comply with the City's noise ordinance. The District has <br /> prepared an acoustical study for the project("Sound analysis for Beverly <br /> Park Switching Station", prepared by BRC Acoustics&Technology. <br /> Consulting, October 12, 2007). This study will be revised when the final <br /> configuration of the station is developed and the transformers are <br /> procured. <br /> 3) Proposed measures to reduce or control noise impacts, if any: <br /> • Low sound level transformers will be specified for the project. If the <br /> combined noise level of the background noise and the transformer sound <br /> exceeds the limits specified by the current City Code, based on the <br /> acoustical study, sound attenuation will be incorporated into the site <br /> design. <br /> 8. Land and Shoreline Use <br /> a. What is the current use of the site and adjacent properties? <br /> • The site is currently used as an electrical transmission switching station. <br /> The adjacent properties to the north and south are low density residential; <br /> to the east the property is not developed and to the west is a mixed <br /> neighborhood of commercial and residential. <br /> b. Has the site been used for agriculture? If so, describe. <br /> • No. <br /> 3 <br />