Question: = = = JINI Normal Normal 4. The air level of gasoline in a 10fx8ftx8ft storage shed is 28,000 ppm. Given a passive ventilation rate

= = = JINI Normal Normal 4. The air level of gasoline in a 10fx8ftx8ft storage shed is 28,000 ppm. Given a passive ventilation rate of 2.5 cfm when the door of the shed is held open, how many hours will it take to reach the LEL? 5. By the end of the day, a 45 ftx25ftx8ft office has a carbon dioxide air level of 1,100 ppm. Determine the time in hours necessary to reduce this concentration to ambient levels (approximately 325 ppm) assuming 20% of the return air is "fresh" makeup air and there are two air changes per hour I d States) Focus - / 5 Not Submitted

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