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OCCUPATIONAL HEALTH <br />SERVICES & ERGONOMICS OHS <br />Advanced Re habifita NOn @etTnes <br />202 - 2425 Tecumseh Road East, Windsor, Sound Sampling <br />Ontario N8W 1E6 <br />Phone: (519) 254 -2222 Fax: (519) 256 -6404 <br />April 28, 2009 <br />Corporation of the County of Essex <br />Human Resources Department <br />360 Fairview Avenue West <br />Essex, ON N8M 1Y6 <br />Re: Essex County Library — Main Branch <br />Sound Sampling — Decibel Readings Analysis <br />Pursuant to a request of Mr. Greg Schlosser, a Decibel Reading - Sound Sampling Analysis <br />was conducted at the Main Branch of the Essex County Library on April 28, 2009. <br />The location is a combination use area which includes offices, library shelving, computer main <br />frames and various other media staging areas. Sampling was conducted to address a concern <br />that peak decibel levels may exceed the Ontario guidelines and that receptors (employees) are <br />being exposed to these high levels. <br />Please refer to Table 1B from the Canadian Centre for Occupational Health and Safety <br />(CCOHS) defining the Noise Exposure Limits for Ontario. <br />TABLE 1B <br />Noise Exposure Limits when Criterion Level = 85 dB(A) <br />Noise - Occupational Exposure Limits in Canada Canadian Centre for Occupational Health and Safety CCOHS <br />Specific to this analysis the Allowable Decibel Level for an 8 hour daily duration is 85 bB (A). <br />