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suburban/urban ambient sound levels and therefore could cause a temporary increase above the threshold discussed above. For reference, typical suburban/urban background sound levels are commonly on the order of 45 to 55 dBA during daytime hours and lower during nighttime hours.20 Because sound pressure levels from construction of a new hotel, which was needed due to a STR ban, have the potential to cause a temporary increase above the noise level threshold, more analysis is needed to evaluate specific impacts and potential mitigation. While construction may be exempt from the noise ordinance during daytime hours, the table below shows that the construction could have a significant noise impact on the community. Furthermore, if any nighttime construction activity is needed for the hotel, the noise levels below show that threshold for nighttime work in the noise ordinance would be exceeded. Table 7. Noise Impacts from Construction Activit Avg. Equip Equip Total Total Total Usage Lmax Acoustical Construction Size, SPL @ SPL @ SPL @ SPL @ Equipment Type Qty Hours SPL @ Use Phase Hp 50 ft 50 ft 50 ft 500 ft per 50 ft Factor dBA dBA dBA dBA Day dBA Rubber Tired Dozers 3 8 367 85 40% 81 86 Site Tractors/Loaders/Bac 89 79 Preparation 4 8 84 84 40% 80 86 khoes Excavators 2 8 36 85 1 40% 81 84 Graders 1 8 148 85 40% 81 81 Rubber Tired Dozers 1 8 367 85 40% 81 81 Grading 90 80 Scrapers 2 8 423 85 40% 81 84 Tractors/Loaders/Bac 2 8 84 84 40% 80 83 khoes Cranes 1 7 367 83 16% 75 75 Forklifts 3 8 82 75 40% 71 76 Building Generator Sets 1 8 14 82 50% 79 79 87 77 Construction Tractors/Loaders/Bac 3 7 84 84 40% 80 85 khoes Welders 1 8 46 1 74 40% 70 1 70 Pavers 2 8 81 85 50% 82 85 Paving Paving Equipment 2 6 89 85 50% 82 85 89 79 Rollers 2 6 36 85 20% 78 81 20 U.S. Environmental Protection Agency, Community Noise, December 31, 1971. 14/14