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Position <br />Front of Building <br />Back of Building <br />(at 1' of rear door) <br />-�. <br />Store #0131 <br />10825 N. Tatum Blvd. <br />Daytime <br />Ambient Barking <br />55 dBA Not audible <br />50 dBA <br />50' Back of Building 50 dBA <br />Barely Audible <br />Not measurable <br />Not Audible <br />Not measurable <br />Roof 67 dBAI Not audible <br />Footnotes: <br />l. Roof-top A/C units <br />2. Cricket noise <br />3. Buzz from light fixture <br />COMMENTS: <br />� <br />Nighttime <br />Ambient Barking <br />55 dBA Not audible <br />48 dBA <br />. . <br />.�.� <br />67 dBA 1 <br />Barely Audible <br />Not measurable <br />Not Audible <br />Not measurable <br />Not audible <br />The back door of Store #Ol 57 is a vestibule double door system. During the daytime <br />measurements, the door to the interior side of the vestibule was open. During the nighttime <br />measurements, the interior door was closed. This double door or vestibule configuration was not <br />present at Store #0131. The rear doors at both locations gave access directly into the space <br />occupied by the dogs. <br />APPROACH <br />Multiple measurements were obtained at each site during the sampling episode. The <br />sound measurements were obtained by use of category I- NIE PC-40 sound level and spectrum <br />analyzer. While the "average dosage" exposure is perhaps the most common method of ineasure <br />for classifying a time-varying sound level, for a given observation period, this testing episode <br />measured the "peak sound level" at given time. The "peak level" is the highest level of sound <br />recorded for the multiple readings obtained during the sampling episode. <br />Since sound levels are expressed in decibels, which are logarithmic, they cannot be <br />averaged arithmetically. Therefore, it is the underlying acoustic pressure squared that is averaged <br />