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dBA, Ldn, which are approximately equivalent to the existing measured levels. These levels would meet the 70 dBA, Ldn, criterion for commercial receptors, as established in the City's General Plan. The impact at the commercial/retail land uses is less-than-significant. Calculations were not made at the single-family residences located to the east of the commercial/retail land uses. The noise levels predicted for the commercial/retail land uses would meet the commercial and residential criteria established in the City's General Plan, and considering the shielding effects that these commercial/retail buildings have on the residential land uses behind them, the impact expected at the single-family residences to the east of the commercial/retail property would be less-than-significant. City of Pleasanton Municipal Code Noise Ordinance According to the Noise Ordinance established in the Municipal Code for the City of Pleasanton, if noise measured along the property plane of a commercial property exceeds 70 dBA, a significant impact has occurred. An exception can be made if any noise does not exceed 70 dBA at 25 feet under its noisiest conditions. Under this guideline, maximum noise levels at the property line of the 7-Eleven carwash project site must not exceed 70 dBA. In Figure 4, the proposed carwash site plans are labeled with noise levels calculated along the property line at various distances from the carwash entrance and exit, assuming the AeroDry quiet dryer system is used. These calculated levels were approximated based on the same estimation method used above in the Noise Element impact discussion. Note, noise levels along the western border of the property were not calculated due to the distance from the noise source and the shielding provided by the 7-Eleven convenient store; the levels measured along the western property line would be less-than-significant. As shown in Figure 4, levels along the northern and eastern property lines are expected to be below 70 dBA, Lmax, and therefore, the impact at these locations would be less-than-significant. However, the noise levels calculated directly south of the carwash exit would exceed the 70 dBA Lmax limit. The southern property line would range from 22 to 38 feet south of the carwash exit, with calculated levels ranging from 71 to 76 dBA Lmax. This would be a significant impact. Once the propagating noise shifts from directly south to southwest, however, the noise levels drop below 70 dBA Lmax, which would not be considered a significant impact at this location. Page 15