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.R A 1'313 th street S. . IP BUitel 3212 minne c)o1jq, mn. 554114 teiephone: 61 2-331 -4571 August 1993 TO, i,ke Falk FRO i DIavid u 0 ACI Noise Study, - Some Thoughts on the Proce -Iss .' Based upon some of the comments at the neighborhood meeting, it is clear that the city position on the current and long term plans for Advance 6i,rcuit,s,and the entire, Terrace Drive industrial park will have to he made more explicit o ( ') I would think that I management would state that current improvements would in no wad, hinder a move in the future to a better location (assuming the, company continues to, grow and is profitable ( ) It is important to point out that 50 dB,A noise is not different from that. experienced by other similar residential areas in the Win Cities Metropolitan Area It is normally not reasonable to expect a rural or e urban environment in a f it st ring suburb. (4) It, is important tiol note that reduce noise, lespleci,all,y unnecessary impact and variable noises that ar generally most disturbing 5) our a road; to House reduction has been to identify the worst problems and address these rather than try and shield the entire roof. It would probably, take a wall 10 to 15 f+eet high to, significantly reduce the noise from all the equipment and this would bring it below the back- ground level from other sources* It is therefore not a costo- effective solution for ACI and , perhaps unreasonable to expect such a solution. It may he that the currently promised treatment is not yet sufficient to meet the 510 d BA. In that case some additional treatment of specific units will have to he addressed For this reason, some additional measurements will likely have to, he made e falkolai3.mem, '� 14 -o