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� <br /> Towne,Richards & Chaudiere, Inc. <br /> Consuftants in Sound and Vibration <br /> June 21 , 1989 'I <br /> Mr. David L. Bigelow <br /> David L. Bigelow Construction <br /> 5126 Narbeck Avenue <br /> Everett, WA 98203 <br /> Re: Hardeson Road Apartments �' <br /> � <br /> Dear Mr. Bigelow: <br /> This letter presents the results of noise measurements made at the site of a <br /> proposed residential development at 8218 Hardeson Road in south Snohanish <br /> County. The site is just south of SR 526 and west of Hardeson Road, and is sr�; <br /> subjected to noise fran traffic on SR 526. The results of the measurements :'� <br /> � <br /> � <br /> are evaluated with respect to Snohomish County Planning Department � ;!'- <br /> requi rements. '':'� <br /> , =:� <br /> ��, � <br /> The noise measurement location was 30 feet south of the SR 526 boundary and �"=- <br /> . �:_: <br /> 109 feet south of the center line of SR 526. The residential unit closest to w,}. <br /> SR �26 is number 1 , which is 13 feet from the boundary line. U_ '°_ <br /> �� : <br /> �� � <br /> The noise measurement was made starting at 9:30 a.m. on June 5, 1989, for a '}µ+�- <br /> , <br /> �'�L• . <br /> time period of 45 minutes. This time period was of sufficient length to a"i <br /> �:s� <br /> obtain an accurate statistical measure of traffic noise at the site. ;;'; <br /> l�'',,�; <br /> ��� <br /> The energy average noise level (symbolized LeQ) at the measurement location °;� <br /> was 66 dB. When adjusted for the second story level at the north face of unit <<, t; <br /> ;; � <br /> 1 (closest to SR 526) , the Leq is 70 d8. At the second story north faces of � <br /> r: � <br /> units 5-11 , the Leq is estimated at 66 dB. ''-�r <br /> a'rc� <br /> ''"_ <br /> ��r: <br /> ;�: <br /> � ' ���'+'�"'�r. � <br /> � � . .. . . .,9�i <br />