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City Council Minutes Page 5 <br />July 6, 2015 <br />----------------------------- <br />Mr. Wells stated he purchased 2” sound foam from ASI in Chaska and installed it 10’ <br />high on all four walls of in the dyno garage port cell in the overhead 4x4 cold air <br />intake ceiling duct. He stated this helped with the reverb going towards the highway <br />and felt the testing reported by Mr. Carlton indicated as such. <br /> <br />Mr. Wells stated he then made two – 30”x30” sound traps with the sound foam, <br />placing the foam 3½” in front of both exhaust fans, to assist in absorbing and <br />diverting the noise traveling out of the exhaust fan. He stated each trap extends 40” <br />upwards, curving like a question mark. He also felt this lowered the decibel levels. <br /> <br />Mr. Wells indicated he may also be losing sound through the 2” solid core door to <br />the cell and may install some 2” foam on the door. He stated the cost for the foam <br />was $3,000 to do the first cell and stated the other cell does not have a door but has a <br />fan and 4x4 ducts in which he will apply the same sound foam board to that cell. <br /> <br />Attorney Hoverson stated the business’s doors to the dyno cell are never up during <br />dyno testing, and Mr. Wells explained how it is necessary the doors be closed to <br />allow the exhaust to flow out of the building. Mr. Halvorson indicated there is a <br />misconception that the doors have remained open during testing and offered an <br />explanation that perhaps its door 7 that is open. He stated on an average day, there <br />are only 3-4 cars driven around areas on the property with the motors running for <br />approximately 30-45 seconds. <br /> <br />Mr. Wells stated he used a 1968 Olds 442 during testing with Mr. Carlton, a vehicle <br />he considered to be the loudest car available to him, and during testing discovered <br />the noise levels of vehicles being backed in and out and how to direct the sound <br />towards the highway. <br /> <br />Mr. Hoverson stated the issue the business continues to have, as he understood it, <br />was noise level created by vehicles as they travel around the buildings on the <br />property. He stated they wished to explore measures to reduce the 83-decibel level at <br />area 7 on the map. He discussed measures to reduce the 83-decibel level in the <br />following manner and requested a continuance of the public hearing to August 3, <br />2015, to determine the feasibility costs of the following measures: <br /> <br /> <br /> <br />Install a sound barrier fence around the property; unsure of cost and if it was <br />even possible. <br /> <br /> <br />Install a garage door in the side of building at area #7 so cars would never <br />have to be outside and running and sound never being directed towards the <br />Mickelson property, area #5. Mr. Wells indicated he is unsure if a door can <br />be installed as this is the drain field for the septic system of the building. It <br />would require pouring 10x25 of concrete or asphalt and he isn’t sure if this is <br />allowed due to greenspace requirements. <br /> <br /> <br />Install a gate on either side of the property to limit after-hours access to the <br />property. <br /> <br /> <br />