INTRODUCTION <br /> <br />The City of Eugene Department of Planning and Development asked Environalysis, LLC to <br />provide a review of the RF and noise emissions of a new communications facility to be located at <br />4060 West Amazon Drive, Eugene Oregon on land zoned as residential (R-1) and adjacent to <br />other R-1 zones. A new 75’ tall monopole would be constructed with associated <br />telecommunications equipment cabinets and a 50KW emergency power generator. A total of <br />twelve (12) antennas would be added to the monopole (four antennas in each of the three <br />sectors). <br /> <br />The City facilitated this review by providing the following data: <br /> <br /> <br /> <br />Project plans from AT & T for Conditional Use Permit number 14-3 <br /> <br /> <br />Application Package from applicant including a NIER (non-ionizing electromagnetic <br />radiation) and an acoustic report. <br /> <br /> <br />NOISE AND RF EMISSIONS OF THE PROJECT <br /> <br />AT & T is proposing to construct a new 75’ tall monopole and equipment platform to be located <br />at 4060 West Amazon Drive. This monopole would be sited on property zoned as residential (R- <br />1) and borders residential (R-1) land; thus an examination of potential noise impacts is <br />necessary. <br /> <br />The new antennas would be centered at 71 feet above grade. There will be a total of twelve (12) <br />antennas installed on the monopole (designed to appear as a tree and known as a “monopine”). <br />Communications equipment cabinets will be housed in a temperature-controlled shelter. A 50 <br />kW diesel-powered emergency generator will be installed as part of this project <br /> <br />PROJECT IMPACTS <br /> <br />The City’s maximum permissible property-line noise standard of 45 dBA applies to this site as it <br />adjoins residential zones. The overall sound pressure rating of the telecommunications <br />equipment to be installed is 72 dBA measured at a distance of 5 feet. The nearest residential <br />property lines are 70 feet to the west and 200 feet to the south. The resulting noise impacts are <br />under the City’s noise ordinance level of 45 dBA but not less than the 35 dBA agreed to by the <br />City for the south property line as part of the Conditional Use Permit process. The installation of <br />low- noise blower options on the two air conditioning units will enable compliance with the 35 <br />dBA limit. <br /> <br />The emergency generator will be operated during power outages and for a monthly 10-minute <br />test) and will cause noise impacts greater than the City’s Ordinance. The proposed 9 foot high <br />noise wall and other mitigation measures (such as, insulating the emergency generator shed and <br />installing a highly effective exhaust stack muffler, an insulated air intake hood and air discharge <br />louver) will reduce them to nearly the 45 dBA standard. However, in order to reduce the <br />generator’s noise impacts to within the City Ordinance the Proponent’s acoustic consultants <br />issued a revised report (April 20, 2015) which incorporated the following changes: <br /> <br />