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874 Lewelling Blvd. <br />Noise Study <br />9 July 2018 <br />Page 6 of 8 <br /> <br /> <br /> <br />Unit Entry Doors <br />The project proposes solid-core wood doors, and these should be fully sealed to the frame <br />using the following products or equal: <br />▪ Perimeter seals: Pemko S88 <br />▪ Drop-seal: Pemko 430 or 434 <br />▪ Threshold to insure proper drop seal closure <br />Ventilation Openings <br />Since partially open windows typically provide 10 to 15 dB of noise reduction, all units exposed <br />to exterior noise levels of 55 dBA CNEL must have a controlled means of fresh air, which <br />includes all units within 150 feet of the Lewelling Blvd. curb (Units 1 to 4). Suitable options for <br />fresh-air intakes include properly designed sound attenuating “Z” ducts on exterior elevations <br />for each residential unit or a forced air mechanical ventilation system. <br />* * * <br />I trust that you will find this information useful , but please do not hesitate to contact our office <br />if you require further assistance. <br /> <br />Sincerely, <br />THE PAPADIMOS GROUP, INC. Reviewed By: <br /> <br />Carter Howard <br />Staff Consultant <br />Nathan Sibon <br />Associate <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />63