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'�����d�����, e���� ��-1�\s��� ' <br /> �� �'�����1�l���� li�� � <br /> , �� <br /> COiJSULL\NTS II� SOUND AND VI6RATION <br /> August 6, 19;g <br /> Iir, Larry L. Qrenihall , President <br /> City Construction Company <br /> '4822 N.E. 31st Circle <br /> Redmond, l•Jashington 98052 <br /> Re: Flcoustical Evaluation <br /> Eleventh Drive 41est and 17 Casino Rd. Apartments <br /> Dear Mr. Bramhall: <br /> We have been asked to examine construction drao-iings for the twu refer•enced <br /> apartment buildings to determine corrpliance erith City o` Everett Noise <br /> Specifications. <br /> The P�oisF Specification is contained in parayraph 3 of the Final Declaration <br /> of Nonsignificance issued by Uennis L. Derrickson, Director, Planning <br /> Department, City of Everett, dated July 31, 1979. The letter states that an <br /> averag� noise level of 65 daA v�as measured at the northeast corner of the <br /> property (adjacent to SR 526) during non-rush liour traffic conditions. The <br /> letter further states that the average noise levei ir,side should not exceed <br /> 45 dQA, this requiring a 20 d6A noise reduction from outside to inside. <br /> We have reference material in our technical iiles sho�ving that the noise <br /> reduction of typical residential construction (�vood frarne, ti•iood siding, <br /> single-glazed windo�;�s, closed) ranges froin a lo��� of 22 to over 30 daA. <br /> 105 ME SGIh S�RH:f, SEAIIIF. �YASHiNG'Ipi�! 9�105 �206; 523-3J50 SGAITIE (503f 221-02;OF'ORiLAND <br />