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<br />The primary source of noise associated with the operation <br />of the proposed project would be from customers utilizing <br />the automated car wash. The automated car wash generates <br />noise from sprayers that apply detergent and water, brushes <br />(if used), blowers used to dry the car and equipment used <br />in the car wash process. Two different types of automated <br />car washes are being considered by the project developer. <br />One utilizes the Mark VII automated car wash system which <br />is a freestanding car wash. Freestanding car wash <br />equipment are situated on a track that moves along the <br />entire extent of the car spraying water, detergent and <br />blowing dry the vehicle. Noise measurements of a Mark VII <br />car wash in Fountain Valley were taken on February 24 and <br />shown in Table N-5. The loudest portion of the Mark VII <br />wash process is the pressurized water sprayers and the air <br />blower. The second automated car wash equipment being <br />considered by the project developer is the Ryko car wash <br />system, which employs water sprayers and cloth brushes that <br />operate along the entire extent of the car being washed. <br />After the car is washed, the driver of the car slowly <br />drives the car to a fixed place blower, which dries the car <br />as it passes. The loudest portion of the Ryko car wash <br />process is the blower. Noise measurements were also <br />obtained of the Ryko car wash equipment in the City of <br />Garden Grove on March 7, 2005. <br /> <br />Exterior Noise Impacts <br /> <br />The City of Santa Ana Noise Ordinance establishes maximum <br />hourly exterior noise standards for the hours of 7 AM to 10 <br />PM. The proposed car wash activity would occur from 7 AM <br />to 9 PM. The hourly noise levels of the two sets of car <br />wash equipment being considered was calculated based on a <br />peak number of 10 car washes per hour1. As shown in Table <br />N-5, the calculated hourly noise levels would exceed the <br />City's exterior noise standard for either type of car wash <br />system. As such, the automated car wash would result in a <br />significant impact to the noise environment and mitigation <br />would be needed to meet the City's exterior noise standard. <br />To reduce potential noise impacts to a level considered <br />less than significant, a 12-foot sound wall is recommended <br />between the proposed carwash and the existing 6-foot block <br />wall along the project site's southern property line. <br /> <br />1 Based on an estimate of car washes per hour at an existing automated car wash owned by of David Shamtoub, located at 25800 S. Western <br />Avenue, Harbor City, <br /> <br />26 <br /> <br />3tA~~8 <br />