Description From the first day the Dubuque Greyhound Park & Casino (DGPC) opened in the summer of 1985, there were complaints about cigarette smoke. With 4,000 to 6,000 people in the building at any one time—the majority of them smokers—the air handling system was pushed beyond its limits. Sufficient outside air could not be introduced to keep the building both cool and smoke free, especially when the humidity was high. In 2004, DGPC appr

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