As described above, there are several different types of VOC monitors that are used within the Sarnia air monitoring network. The table below compares how each monitor is used within the network.
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Types of VOC Monitors
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Non-Continuous Canisters
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Real-Time GC
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Airpointer MiniGC
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Passive Monitor
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Sample period
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24-hour
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1-hour
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1-hour
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2-week
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Sample Frequency
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Every 6 or 12 days
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Continuous
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Continuous
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Continuous
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Sample Analysis
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Laboratory analysis required
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Sample analyzed by monitor – results available in near real-time
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Sample analyzed by monitor – post-processing of results required to determine concentration based on calibrations
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Laboratory analysis required
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VOC measured
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>50 including benzene and 1,3-butadiene
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Benzene
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Benzene, toluene, ethyl benzene, and xylene
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Benzene or 1,3-butadiene
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Stations
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Aamjiwnaang
Christina Street
Front Street
River Bend
AP1 – Clearwater
AP2 – Eddings Street
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Aamjiwnaang
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AP1 – North Aamjiwnaang
AP2 – Vidal Street
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Property-line monitoring as part of the Petroleum Refining and Petrochemical Industry Standards
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