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 SO 2 AAQC to CASA 3. Review of airpointer data 4. Suggestions for other CASA website improvements 2
1. CASA Website Updates • Routine update of non-continuous data as new laboratory results become available 3
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) 4
1. CASA Website Updates • New posting of data from the temporary air monitoring stations 5
1. CASA Website Updates • Airpointer locations (APs) old new locations locations 6
1. CASA Website Updates new locations old locations 7
1. CASA Website Updates • Comparison of VOC monitoring equipment 8
1. CASA Website Updates • November 25, 2019 meeting material posted • Presentation • Meeting Summary 9
2. New SO 2 AAQC to CASA • 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. 10
2. New SO 2 AAQC to CASA The classification system is based 1-hour AAQC or comparable reference values . 11
2. New SO 2 AAQC to CASA 1-hour AAQC: 40 ppb • Proposed categorization and associated messaging, based on • assessment of health risks Current Proposed Category Classification Classification Good 0 – 169 ppb 0 – 40 ppb Air quality will be classified as Moderate if the 1-hour SO 2 AAQC is Moderate 169 – 250 ppb 40 – 120 ppb exceeded. Poor 250 – 2000 ppb 120 – 250 ppb Very Poor > 2000 ppb > 250 ppb This is aligned with the level of risk that the toxicologists considered when the new AAQC was developed. 12
2. New SO 2 AAQC to CASA • Number of hours classified in each category • Data from Feb. 21, 2018 – Nov. 21, 2019 13
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. 14
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 AP2 – Vidal Street operating since November 20, 2019 • Data from this location is not yet posted on the CASA website but AP1 – Aamjiwnaang will be coming soon North • These monitors are located in the community areas where concentrations were anticipated to be elevated 15
3. Review of Airpointer Data • AP1 – Aamjiwnaang North • Concentrations of SO 2 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) 16
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/m 3 ) 63% of the time 17
4. Suggestions for Improvements • Open discussion for CASA website improvements • Additional educational resources • Tips for improving general air quality 18
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