Photo credit Sootoday
OPACITY is a relative measure of how much particulate matter is present in smoke.
A beam of light is passed through the smoke in the stack and a sensor (photometer) measures the percentage of light blocked by the particles in the smoke... the higher the percentage, then the greater the amount of particulates.
Micro-particles in smoke are known to cause adverse health effects. PM10 and PM2.5 have set limits for human exposure.
Provincial Regulation 507 prohibits stack emissions of over 20% opacity IF the emission exceeds 6 minutes duration.
At ASI, coke oven stacks are continuously monitored (and recorded) for stack opacity.
The charts below are presented to help you to determine if an emission is out of compliance
A beam of light is passed through the smoke in the stack and a sensor (photometer) measures the percentage of light blocked by the particles in the smoke... the higher the percentage, then the greater the amount of particulates.
Micro-particles in smoke are known to cause adverse health effects. PM10 and PM2.5 have set limits for human exposure.
Provincial Regulation 507 prohibits stack emissions of over 20% opacity IF the emission exceeds 6 minutes duration.
At ASI, coke oven stacks are continuously monitored (and recorded) for stack opacity.
The charts below are presented to help you to determine if an emission is out of compliance
White smoke opacities (Alaska Department of Environmental Conservation)
EMAIL: [email protected]
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