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Ms. Hosterman believed the lake hosted motorboat races twice a year. She said that the noise level is excruciatingly loud. She asked how many decibels the motorboats generate, and how would it compare to the decibel level for the water park? Ms. Knutson could not provide an answer for the noise level as it related to the motor boat races. She stated that the ambient noise level on an every day basis at the water park is about 65 to 70 decibels, and will remain the same ambient noise level even after the water park is built, with the new mitigations in place. Peter McDonald, 351 8t~ Street, San Francisco, representing Smith, Fause & McDonald, Inc., mentioned that typically, high performance motorboat engines could generate upwards of S0 to 90 dBA at a distance of a 150 to 160 feet. By comparison, the total noise emission of the park through all of the sources and from all of the contributors has to be mitigated to the City's standard of 70 dBA at 25 feet. When this is translated out to the 370 to 600 foot boundaries to the nearest receivers in the neighborhood, the effect is about a 40 dBA background noise. For example, if he were to stop talking and everyone in the room were to hold his or her breath, the background noise in this room would be about 40 dBA. Therefore, the water park will translate, at the nearest occupied boundary at about the background noise level currently in the Council Chambers. Ms. Hosterman asked for the EBRPD to make the noise level as it related to the motorboat races available. She believed this would be a guiding mark for trying to decipher what kind of noise the water park will generate. She believed the noise study only took into account people's voices. She was more concerned about other noise elements. She asked the consultant if his noise studies had covered other types of noise levels that the water park could generate? Mr. McDonald noted that the three primary noise elements that his firm assessed were people, water pumps and public address systems in use. He noted that his environmental acoustics assessment described the noise level of patrons coming through the drop off road as a potential source, which is similar to that of a carwash. Through the planning review process, Mr. Kierstead has committed to staffing the drop off entrances so that vehicle drivers are required to turn down their radios. He did not believe there was enough room on the drop offroad to generate noise from squealing cars. If after the first year of Phase I the noise levels were exceeded, Ms. Ayala asked if Council could pull the conditional use permit? Mr. Swift said yes. He pointed out that there is a condition that requires the noise level to be no greater than 70 dBA at 25 feet. If staff receives a noise compliant, it will check it out and if it is found to be too noisy, staff will ask the applicant to make it quieter or refer it back to the Planning Commission. Ms. Hosterman asked what the fee would be for an individual to visit the water park? Pleasanton City Council 18 03/16/04 Minutes