Ex. E <br />c) A diesel motor/generator set does not idle when it is turned on. Stationary engines are set to <br />run at one speed, the power delivery rpm.EC 6.7not working <br />engines. <br />5) Conclusion <br />SSA has made numerous errors and omissions in the development of their noise impact model. <br />The Generator noise model grossly under estimates the noise impact on nearby houses. The <br />HVAC model is marginally adequate provided there is no open air vent is opened between the <br />equipment room and the outside air. The fact is that there always has to be an open air vent <br />between the equipment room and outside air, a pressure relief vent is not in the SSA assessment. <br />Another serious error in the SSA report is that it does not address future expansion of the site, <br />when the second equipment room is inevitably leased out to house additional communication <br />equipment and additional cooling equipment, equivalent to the first set, is installed on the <br />exterior wall of that room. Adding this to the initial proposal, we see that the city limit of 35 <br />dBA is exceeded at all sites and the limit of 45 dBA is exceeded to the west and south. <br />Additionally, the emergency generator set has been shown to violate all standards of sensibility <br />as well as Eugene code limits of 45 dB,A and night time nuisance noise code. An accurate <br />assessment of generator noise shows it violates the 45 dBA limit by 17 dBA to the west, by 13 <br />to the north of the proposed site. <br />These huge 17 dB violations and are exclusively due to the necessarily large openings in the wall <br />of the generator room needed for cooling. An additional 17 dB reduction in noise means the <br />th <br />noise output must be physically reduced to 1/50 the present amount of noise being emitted <br />through the open air vents of the generator room, a seemingly impossible task. <br />Respectfully Submitted, <br />Arthur Noxon, PE <br />Acoustical Engineer <br />16 <br />