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6. Level of Significance After Mitigation Project construction related noise impacts would be reduced to a less than significant level upon compliance with the City Ordinance 18-314. The operation of the automated car wash would generate noise levels which exceed the City's exterior noise standards and required the application of mitigation measures to comply with Section 18-312 of the municipal code. The construction of the sound wall would result in noise levels at the condominiums which are below the City's exterior noise standard as shown in Table 6-1. Interior noise level would likewise be below the City's noise standard. With the application of mitigation measures, the project would be in compliance with the City exterior and interior noise standards and would not result in a significant impact to the ambient noise environment. Table 6-1 Automated Car Wash Noise with Sound Wall (dBA) I Maximum I L(2) L(8) L(25) L(50) MARK VII CAR WASH EQUIPMENT Hourly Noise Level at Property Line of Apartments 44 44 44 43 40 City Noise Standards 75 70 65 60 55 Exceeds Exterior Noise Standard? No No No No No MARK VII CAR WASH EQUIPMENT Hourly Noise Level at Windows/Balconies of Apartments 49 49 48 47 44 City Noise Standards 75 70 65 60 55 Exceeds Exterior Noise Standard? No No No No No RYKO CAR WASH EQUIPMENT ~ Hourly Noise Level at Property Line of Apartments 48 47 46 43 34 City Noise Standards 75 70 65 60 55 Exceeds Exterior Noise Standard? No No No No No RYKO CAR WASH EQUIPMENT Hourly Noise Level at Windows/Balconies of Apartments 53 52 51 48 36 City Noise Standards 75 70 65 60 55 Exceeds Exterior Noise Standard? No No No No No The Planning Center, March 8, 2005 Technical NoiJe Study for Mobil Oil Station/Car WaJh Expamion The Plcmning Center Manh 2005 . Page] 9 Q: \SJ 1/lI\J - () 1. OF\ShdmflJ/lII _;\r'ii_li: k~//lwl- FI :,\1 A f "dlJt 31A8~ 05