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("KL HealthE//VFELOER afet <br /> �\ Blight People.Fight Solutions. S y <br /> Duration per Day Sound Level <br /> Hours Minutes dBA <br /> 16 960 85 <br /> 8 480 90 <br /> 4 240 95 <br /> 2 120 100 <br /> 1 60 105 <br /> % 30 110 <br /> '/4 15 115 <br /> % 7.5 120 <br /> Table 1. Permissible Exposure Limits <br /> NOTE: No exposure to continuous or intermittent noise levels in excess of these <br /> limits is allowed. <br /> 5-07.6 Impulse or Impact Noise Levels <br /> Impulse, or impact noise, is considered to be those variations in noise levels that <br /> involve peak levels spaced at periods of greater than one per second. Exposure to <br /> impulse or impact noise shall not exceed the limits listed in Table 2 or Figure 1. No <br /> exposures in excess of 140 dB peak sound pressure level shall be permitted <br /> (where the intervals are less than one second, it should be considered a <br /> continuous noise source). <br /> Sound Level Permitted Number of Impulses <br /> dB or Impacts Per Day <br /> 140 100 <br /> 130 1,000 <br /> 120 10,000 <br /> Table 2. Permissible Exposure Limits: Impulsive or Impact Noise <br /> 5-07.6.1 Noise Level Guidance for Various Work Locations <br /> Aside from creating health hazards, noise can interfere with normal work activities. <br /> Noise levels below the health effects levels can cause speech interference and <br /> nuisance problems. These nuisance noise levels are distracting, and can interfere <br /> with a workers concentration, thereby reducing work efficiency. The noise level <br /> guidelines listed in Table 3 are provided to limit noise levels for offices. <br /> Page 4 of 9 Copyright 2019 Kleinfelder, Inc <br /> Important: When modifying this document, update properties with <br /> your name, date, and nature of changes made. <br />