Laserfiche WebLink
t-,N� i ....._ <br /> � y ' <br /> Q� x .we � <br /> �y y � ---- --- <br /> � -- -- -- --...._ 4 ..-- - - -- - <br /> �• � <br /> KC�m� AEL R, YANTIS AS�''CIATES, INC., P.S, °�" �� �(�—� ', <br /> �1 y"tl consulting In acoustics and vlbration �I I � " , II <br /> V <br /> x <br /> � �� <br /> oH <br /> ��g . - -•��uue�d <br /> � Deceraber 20, 1991 ��I� <br /> �N <br /> H <br /> � �, <br /> g� � Prudential Duryee Realty Srokerage , ��"` - J ' n <br /> 2721 Wetmore AVe. <br /> ���� Everett, WA 98201 (: _ _ t� <br /> �'�' � Attention: Mr. Paul Owen ` � <br /> Referenca: Builders Millwork Supply, Southpointe Industrial 2ark li <br /> Expected Noise Levels frum Dust Collector <br /> `i � <br /> Dear Paul: <br /> At your request, I have reviewed the planned dust coliector for i <br /> -�e Ruilders Millwork Supply facility located at the Southoointe <br /> Zndustrial Park. According to the inEormation that was sent to � <br /> my ofEice, a Murphy-Rogers 242M-12-4D dust collector wili. be used <br /> at the facility, equipped with a silencer. The manufacturer of <br /> that dust collector reoorts that the sound levels at a distance <br /> of 10 feet from all Eour sides will range between 75 to 78 dBA. <br /> '�1 These sound levels are based on a test in 1989 by the <br /> manufscturer, for a dust col2ector eauipped r�i'_h a silencer, <br /> ��� including some shon noise. Actual sound levels from the dust , <br /> collector, without the shop noise, may therefore be slightly i <br /> '�' less. ' <br /> ��� mne dust collector will be located on the west side of the � <br /> '�1 Builders Millwork Supply building, at a discance approximately 60 <br /> feet from the north pronerty line, which adjoins commercial <br /> ' ' property. The , city of Everett noise ordinance limits the noise <br /> � levels between commercial prcperties to 60 dBA. <br /> ' Expected dust collector noise level at the adjoining commerCial <br /> f prooerty, at a distance of 60 feet Erom the dust collector, is 65 <br /> dBA. This takes into account a 78 dBA source level, the distance <br /> � correc�ion from the dust ecllector to the property line, and the <br /> � � rePlection Prom the building that the dust collector serves. <br /> '�' The noise levels Erom the dust Collector can be reduced at the <br /> � north property line by placinq an acoustical screen on the north <br /> ��' and west sides of the dust collector. The acoustical screen <br /> � sYtould extend from the ground level to a height of roughly 2 feet <br /> above the top elevation of the dust collector (including all <br /> attached duct work) . There are many possibilities Por materials <br /> i2�09 Bel•R>d Rcad.Suite 203 <br /> Bellevue,WA 980Q5 <br /> O�fice t206>454-a28"s <br /> Fax(206)d54-0759 <br /> � <br /> 1 <br />