Photo credit: Sue Thompson Presentation Outline 1. CASA website - - PowerPoint PPT Presentation

Photo credit: Sue Thompson

Presentation Outline

• 1. CASA website updates:
• Quarterly update of non-continuous data
• Posting of airpointer data
• Comparison of VOC monitoring
• Posting of presentation and summary of Nov. 25 meeting
• 2. Incorporating new SO2 AAQC to CASA
• 3. Review of airpointer data
• 4. Suggestions for other CASA website improvements

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• 1. CASA Website Updates

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• Routine update of non-continuous data as new

laboratory results become available

• 1. CASA Website Updates
• New non-continuous data posted
• TSP and metal results from the Aamjiwnaang and Front

Street stations

• June – July 2019
• PAH results from the Aamjiwnaang station
• June – September 2019
• VOC results from the Front Street and River Bend

stations

• July – November 2019
• These new results did not have any exceedances of

the Ambient Air Quality Criteria (AAQC)

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• 1. CASA Website Updates

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• New posting of data from the temporary air

monitoring stations

• 1. CASA Website Updates

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• Airpointer locations (APs)
• ld

locations new locations

• 1. CASA Website Updates

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• ld locations

new locations

• 1. CASA Website Updates
• Comparison of VOC monitoring equipment

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• 1. CASA Website Updates
• November 25, 2019 meeting material posted
• Presentation
• Meeting Summary

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• 2. New SO2 AAQC to CASA

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• Pollutant concentrations shown on the CASA website

(map and tables) are colour-coded to help users understand what air contaminant concentrations are and what they mean – are they of concern? How do they compare to MECP standards?

• The website shows hourly pollutant concentrations, so

the classification system and associated colour scheme provides a general comparison to the 1-hr AAQC or comparable reference value.

• This system is not intended to provide information on

health risks. The website provides links to other resources for information on health risks and/or emergency planning.

• 2. New SO2 AAQC to CASA

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The classification system is based 1-hour AAQC or comparable reference values.

• 2. New SO2 AAQC to CASA

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• 1-hour AAQC: 40 ppb
• Proposed categorization and associated messaging, based on

assessment of health risks

Category Current Classification Proposed Classification Good 0 – 169 ppb 0 – 40 ppb Moderate 169 – 250 ppb 40 – 120 ppb Poor 250 – 2000 ppb 120 – 250 ppb Very Poor > 2000 ppb > 250 ppb

Air quality will be classified as Moderate if the 1-hour SO2 AAQC is exceeded. This is aligned with the level of risk that the toxicologists considered when the new AAQC was developed.

• 2. New SO2 AAQC to CASA

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• Number of hours classified in each category
• Data from Feb. 21, 2018 – Nov. 21, 2019

• 3. Review of Airpointer Data
• Data from this study now posted on

the CASA website

• A summary report is also posted on

the CASA website

• AP1 generally measured lower

concentrations than other stations in the network. Review suggested concentrations to be more elevated at the north side of Aamjiwnaang.

• AP2 generally measured

concentrations comparable to other stations in the network. Review suggested concentrations to be more elevated further west.

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• 3. Review of Airpointer Data
• AP1 – Aamjiwnaang North has

been operating since March 8, 2019

• Hourly data from this location is

available on the CASA website up until October 31, 2019

• AP2 – Vidal Street has been
• perating since November 20,

2019

• Data from this location is not yet

posted on the CASA website but will be coming soon

• These monitors are located in the

community areas where concentrations were anticipated to be elevated

AP1 – Aamjiwnaang North 15 AP2 – Vidal Street

• 3. Review of Airpointer Data
• AP1 – Aamjiwnaang North
• Concentrations of SO2 at this location have been higher

than other locations in the network

• While the majority of hours are below the 1-hour AAQC

(40 ppb), they have also been above the AAQC on multiple occasions (2% of the time)

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• 3. Review of Airpointer Data
• AP1 – Aamjiwnaang North
• Concentrations of benzene at this location have been

higher than other locations in the network

• There is currently insufficient data to compare

concentrations directly to the annual AAQC

• Daily concentrations were above the 24-hour AAQC

(2.3 µg/m3) 63% of the time

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• 4. Suggestions for Improvements
• Open discussion for CASA website improvements
• Additional educational resources
• Tips for improving general air quality

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