Scenario: Air Quality MonitoringVersion en ligne A conversation between a PHI and an ice arena operator par Mike Scott Public Health Inspector How and when do you measure CO and NO2 concentration levels in the ice pad area? Ice Arena Operator We have a continuous air monitoring system for carbon monoxide with digital readouts throughout the ice pad areas. The measurements are logged in a computer software system. Public Health Inspector That’s great. Although the computer software maintains records of the CO measurements, you must ensure that staff are monitoring the levels daily and weekly to identify trends. Is the air monitoring system equipped with an audible alarm? Ice Arena Operator Yes, it is. Public Health Inspector Good. At what concentration is the sensor set to alarm? Ice Arena Operator I believe it is around 75ppm. Public Health Inspector That is at evacuation level. I would recommend lowering that concentration to 25ppm to help protect the most susceptible populations from low-level exposure and avoid emergency evacuation. It is recommended to maintain CO levels below 10ppm. Alarming at 25ppm would allow staff to find the cause of the elevated levels before concentrations reach evacuation levels. Is the continuous air monitoring system equipped with a NO2 sensor? Ice Arena Operator No, just CO. It would be redundant to have both a CO and NO2 sensor. If the CO concentrations are high, then surely the NO2 levels would be high as well and vice versa. Public Health Inspector Both NO2 and CO levels should be monitored. An arena can meet CO concentration guidelines while still having NO2 levels capable of causing negative health impacts.
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