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Mobile Construction Activity Noise Calculation <br />Receptor:Noise Level Calculation Prior to Implementation of Noise Attenuation Requirements <br />No.Equipment Description Lmax Lmax Leq <br />1 Grader 85 1 40 100 1 0 79.0 72.0 15811388.3 <br />2 Excavator 85 1 40 150 1 0 75.5 66.7 4684855.793 <br />3 Dozer 85 1 40 150 1 0 75.5 66.7 4684855.793 <br />4 Front End Loader 80 1 40 200 1 0 68.0 58.0 625000 <br />5 Backhoe 80 1 40 200 1 0 68.0 58.0 625000 <br />6 <br />7 <br />8 <br />9 <br />10 <br />Notes:Lmax[4]79 Leq 74 <br />[1] Percentage of time activity occurs each hour <br />[2] Soft ground terrain between project site and receptor. <br />[3] Shielding due to terrain or structures <br />[4] Calculated Lmax is the Loudest value. <br />Receiving residential property line <br />Shielding <br />(dBA)[3] <br />Calculated (dBA) <br />Energy <br />Reference <br />(dBA) 50 ft <br />Quantity <br />Usage <br />factor[1] <br />Distance to <br />Receptor <br />Ground <br />Effect[2] <br />I I I I I I I <br />I I I I <br />I I I I