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for the neighboring residents. She asked Mr. Svinth how his firm arrived at the sound levels it measured during its survey? Mr. Svinth said that Illingworth and Rodkin, Inc. measures weighted noise levels, which is a single number that relates to the noise ordinance. A Type One sound level meter was used which means it is precise enough to measure the correct levels. When he conducted the sho~t-term surveys, he used a hand held meter and monitored sound levels on the property line as the vehicles passed threugh. For the long-term survey, he placed a similar sound level meter on two different residential preperty lines. He recorded levels over night and compared the different levels and how they travel frem the preperty line to the residences. Ms. Hosterman mentioned that there is a tremendous amount of noise that is genereted at 5 p.m. She asked what the difference is between trying to obtain a fair measurement of the amplified box at the back of the drive-through at 5 p.m. versus midnight? Mr. Svinth said that when he was out at the site during the day, the backgreund noise levels were typically 58 to 62 dBA, unless a vehicle was going by. He evaluated the meter and listened to the tape and he could actually hear the sound from the drive- threugh, which did not cause the response in the meter to change. The noise level is either at or below the backgreund sound levels and the absolute number is not higher than what is occurring in the background. During the quieter periods of time when the backgreund noise was between 55 and 56 dBA, it was also behaving the same way. Ms. Hosterman asked what the noise level dreps down to when there is no traffic at midnight? Mr. Svinth recalled that the backgreund levels dropped to between 40 and 50 dBA. He said the noise level would be audible but not over the parameters of the City's noise ordinance. Ms. Hosterman asked if the noise level would be so different that it would be disturbing? Mr. Svinth said that the noise level would be determined by individual response. In response to an inquiry by Mr. Campbell, Mr. Svinth said that a neighboring resident would be able to hear the voices of patrens ordering food if there were not any noise generated by traffic. Once the wooden fence is erected, Ms. Hosterman asked Mr. Svinth if he would be willing to gather new data that would show differences between traffic noise generated during the day and what noise might be generated during the evening hours. Mr. Svinth said he would be willing to measure the noise levels to determine if they have significantly quieted down once the fence has been erected. He believed the sound levels would drep significantly with the building of a wooden fence. The noise sources for vehicles going threugh the drive-through are fairly Iow to the ground, with the exception of a large truck. Mr. Brezosky mentioned that he measured the noise levels at the car wash while it was in operation and the noise level was at 58 dBA. The only time the noise levels were Pleasanton City Council 22 09/07/04 Minutes