Appendix B - Air Quality.pdf
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This document is an environmental assessment summary report for the Glendale Narrows Programmatic EA project. The report provides details on the project scope, location, land use types, emissions analysis, climate risk assessment, and evaluation of health and equity impacts. The project involves maintenance activities along the Los Angeles River in Glendale, California, and is expected to begin construction in September 2023. The lead agency is the U.S. Army Corps of Engineers. The emissions analysis indicates construction activities would generate criteria pollutants and greenhouse gases at levels below applicable thresholds. Climate risks from temperature extremes, sea level rise, wildfires, and degraded air quality were identified, though adaptive capacity is planned to reduce overall vulnerabilities. Nearby communities face high pollution burdens and lower health outcomes according to screening tools.
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Ten Year Operations and Maintenance Plan for the Glendale Narrows Reach of the Los Angeles River
Programmatic Environmental Assessment
Appendix B
Air Quality
Glendale Narrows Programmatic EA v3 Summary Report, 6/21/2023
1 / 5
Glendale Narrows Programmatic EA v3 Summary Report
Table of Contents
1. Basic Project Information
1.1. Basic Project Information
1.2. Land Use Types
1.3. User-Selected Emission Reduction Measures by Emissions Sector
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
6.3. Adjusted Climate Risk Scores
7. Health and Equity Details
7.3. Overall Health & Equity Scores
7.5. Evaluation Scorecard
2 / 5
1. Basic Project Information
1.1. Basic Project Information
Data Field Value
Project Name Glendale Narrows Programmatic EA v3
Construction Start Date 9/15/2023
Lead Agency USACE
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 0.50
Precipitation (days) 16.8
Location 34.110174235996126, -118.26072416134207
County Los Angeles-South Coast
City Los Angeles
Air District South Coast AQMD
Air Basin South Coast
TAZ 3977
EDFZ 16
Electric Utility Los Angeles Department of Water & Power
Gas Utility Southern California Gas
App Version 2022.1.1.14
1.2. Land Use Types
Land Use Subtype Size Unit Lot Acreage Building Area (sq ft) Landscape Area (sq ft)
Special Landscape Area (sq ft)
Population Description
City Park 1.00 Acre 173 0.00 — — — —
3 / 5
1.3. User-Selected Emission Reduction Measures by Emissions Sector
No measures selected
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e
Daily, Summer (Max)
Unmit. 4.93 3.89 44.4 35.7 0.08 1.73 42.3 44.0 1.59 12.6 14.2 — 10,340 10,340 0.52 0.89 13.1 10,632
Daily, Winter (Max)
Unmit. 4.92 3.88 44.7 35.6 0.08 1.73 42.3 44.0 1.59 12.6 14.2 — 10,331 10,331 0.52 0.89 0.34 10,610
Average Daily (Max)
Unmit. 1.04 0.82 9.47 7.52 0.02 0.36 8.94 9.31 0.34 2.67 3.00 — 2,184 2,184 0.11 0.19 1.19 2,244
Annual (Max)
Unmit. 0.19 0.15 1.73 1.37 < 0.005 0.07 1.63 1.70 0.06 0.49 0.55 — 362 362 0.02 0.03 0.20 372
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Temperature and Extreme Heat 1 0 0 N/A
Extreme Precipitation N/A N/A N/A N/A
4 / 5
Sea Level Rise 1 0 0 N/A
Wildfire 1 0 0 N/A
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 0 0 0 N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.
6.3. Adjusted Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Temperature and Extreme Heat 1 1 1 2
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise 1 1 1 2
Wildfire 1 1 1 2
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 1 1 1 2
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.
7. Health and Equity Details
5 / 5
7.3. Overall Health & Equity Scores
Metric Result for Project Census Tract
CalEnviroScreen 4.0 Score for Project Location (a) 97.0
Healthy Places Index Score for Project Location (b) 48.0
Project Located in a Designated Disadvantaged Community (Senate Bill 535) Yes
Project Located in a Low-Income Community (Assembly Bill 1550) Yes
Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.
b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.
Health & Equity Evaluation Scorecard not completed.
Glendale Narrows Programmatic EA v3 Summary Report
Table of Contents
1. Basic Project Information
1.1. Basic Project Information
1.2. Land Use Types
1.3. User-Selected Emission Reduction Measures by Emissions Sector
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
6.3. Adjusted Climate Risk Scores
7. Health and Equity Details
1. Basic Project Information
1.1. Basic Project Information
Data Field Value
Project Name Glendale Narrows Programmatic EA v3
Construction Start Date 9/15/2023
Lead Agency USACE
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 0.50
Precipitation (days) 16.8
Location 34.110174235996126, -118.26072416134207
County Los Angeles-South Coast
City Los Angeles
Air District South Coast AQMD
Air Basin South Coast
TAZ 3977
EDFZ 16
Electric Utility Los Angeles Department of Water & Power
Gas Utility Southern California Gas
App Version 2022.1.1.14
1.2. Land Use Types
Land Use Subtype Size Unit Lot Acreage Building Area (sq ft) Landscape Area (sq ft)
Special Landscape Area (sq ft)
1.3. User-Selected Emission Reduction Measures by Emissions Sector
No measures selected
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e
Daily, Summer (Max)
Unmit. 4.58 3.80 38.9 33.6 0.05 1.67 41.2 42.9 1.54 12.3 13.9 — 6,042 6,042 0.27 0.21 3.32 6,115
Daily, Winter (Max)
Unmit. 4.58 3.80 38.9 33.4 0.05 1.67 41.2 42.9 1.54 12.3 13.9 — 6,031 6,031 0.27 0.21 0.09 6,101
Average Daily (Max)
Unmit. 0.97 0.80 8.23 7.08 0.01 0.35 8.70 9.06 0.33 2.60 2.93 — 1,275 1,275 0.06 0.05 0.30 1,290
Annual (Max)
Unmit. 0.18 0.15 1.50 1.29 < 0.005 0.06 1.59 1.65 0.06 0.48 0.53 — 211 211 0.01 0.01 0.05 214
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Sea Level Rise 1 0 0 N/A
Wildfire 1 0 0 N/A
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 0 0 0 N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.
6.3. Adjusted Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Temperature and Extreme Heat 1 1 1 2
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise 1 1 1 2
Wildfire 1 1 1 2
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 1 1 1 2
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.
7.3. Overall Health & Equity Scores
Metric Result for Project Census Tract
CalEnviroScreen 4.0 Score for Project Location (a) 97.0
Healthy Places Index Score for Project Location (b) 48.0
Project Located in a Designated Disadvantaged Community (Senate Bill 535) Yes
Project Located in a Low-Income Community (Assembly Bill 1550) Yes
Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.
b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.
Glendale Narrows Programmatic EA Summary Report, 6/12/2023
Glendale Narrows Programmatic EA Summary Report
Table of Contents
1. Basic Project Information
1.1. Basic Project Information
1.2. Land Use Types
1.3. User-Selected Emission Reduction Measures by Emissions Sector
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
6.3. Adjusted Climate Risk Scores
7. Health and Equity Details
1. Basic Project Information
1.1. Basic Project Information
Data Field Value
Project Name Glendale Narrows Programmatic EA
Construction Start Date 9/15/2023
Lead Agency USACE
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 0.50
Precipitation (days) 16.8
Location 34.110174235996126, -118.26072416134207
County Los Angeles-South Coast
City Los Angeles
Air District South Coast AQMD
Air Basin South Coast
TAZ 3977
EDFZ 16
Electric Utility Los Angeles Department of Water & Power
Gas Utility Southern California Gas
App Version 2022.1.1.13
1.2. Land Use Types
Land Use Subtype Size Unit Lot Acreage Building Area (sq ft) Landscape Area (sq ft)
Special Landscape Area (sq ft)
1.3. User-Selected Emission Reduction Measures by Emissions Sector
No measures selected
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e
Daily, Summer (Max)
Unmit. 5.46 4.03 52.7 38.9 0.12 1.80 44.0 45.8 1.67 13.1 14.8 — 16,787 16,787 0.91 1.91 27.7 17,407
Daily, Winter (Max)
Unmit. 5.44 4.01 53.3 38.7 0.12 1.80 44.0 45.8 1.67 13.1 14.8 — 16,780 16,780 0.91 1.91 0.72 17,373
Average Daily (Max)
Unmit. 1.15 0.85 11.3 8.19 0.03 0.38 9.30 9.68 0.35 2.76 3.12 — 3,547 3,547 0.19 0.40 2.52 3,674
Annual (Max)
Unmit. 0.21 0.16 2.06 1.49 < 0.005 0.07 1.70 1.77 0.06 0.50 0.57 — 587 587 0.03 0.07 0.42 608
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Sea Level Rise 1 0 0 N/A
Wildfire 1 0 0 N/A
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 0 0 0 N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.
6.3. Adjusted Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Temperature and Extreme Heat 1 1 1 2
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise 1 1 1 2
Wildfire 1 1 1 2
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 1 1 1 2
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.
7.3. Overall Health & Equity Scores
Metric Result for Project Census Tract
CalEnviroScreen 4.0 Score for Project Location (a) 97.0
Healthy Places Index Score for Project Location (b) 48.0
Project Located in a Designated Disadvantaged Community (Senate Bill 535) Yes
Project Located in a Low-Income Community (Assembly Bill 1550) Yes
Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.
b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.
Glendale Narrows Programmatic EA Summary Report
Table of Contents
1. Basic Project Information
1.1. Basic Project Information
1.2. Land Use Types
1.3. User-Selected Emission Reduction Measures by Emissions Sector
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
6.3. Adjusted Climate Risk Scores
7. Health and Equity Details
1. Basic Project Information
1.1. Basic Project Information
Data Field Value
Project Name Glendale Narrows Programmatic EA
Construction Start Date 9/15/2023
Lead Agency USACE
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 0.50
Precipitation (days) 16.8
Location 34.110174235996126, -118.26072416134207
County Los Angeles-South Coast
City Los Angeles
Air District South Coast AQMD
Air Basin South Coast
TAZ 3977
EDFZ 16
Electric Utility Los Angeles Department of Water & Power
Gas Utility Southern California Gas
App Version 2022.1.1.13
1.2. Land Use Types
Land Use Subtype Size Unit Lot Acreage Building Area (sq ft) Landscape Area (sq ft)
Special Landscape Area (sq ft)
1.3. User-Selected Emission Reduction Measures by Emissions Sector
No measures selected
2. Emissions Summary
2.1. Construction Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e
Daily, Summer (Max)
Unmit. 4.64 3.81 39.8 34.0 0.06 1.68 41.4 43.1 1.55 12.4 13.9 — 6,758 6,758 0.31 0.33 4.94 6,868
Daily, Winter (Max)
Unmit. 4.64 3.81 39.9 33.8 0.06 1.68 41.4 43.1 1.55 12.4 13.9 — 6,747 6,747 0.31 0.33 0.13 6,853
Average Daily (Max)
Unmit. 0.98 0.81 8.44 7.15 0.01 0.36 8.74 9.10 0.33 2.62 2.94 — 1,427 1,427 0.07 0.07 0.45 1,449
Annual (Max)
Unmit. 0.18 0.15 1.54 1.31 < 0.005 0.06 1.60 1.66 0.06 0.48 0.54 — 236 236 0.01 0.01 0.07 240
6. Climate Risk Detailed Report
6.2. Initial Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Sea Level Rise 1 0 0 N/A
Wildfire 1 0 0 N/A
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 0 0 0 N/A
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores do not include implementation of climate risk reduction measures.
6.3. Adjusted Climate Risk Scores
Climate Hazard Exposure Score Sensitivity Score Adaptive Capacity Score Vulnerability Score
Temperature and Extreme Heat 1 1 1 2
Extreme Precipitation N/A N/A N/A N/A
Sea Level Rise 1 1 1 2
Wildfire 1 1 1 2
Flooding N/A N/A N/A N/A
Drought N/A N/A N/A N/A
Snowpack Reduction N/A N/A N/A N/A
Air Quality Degradation 1 1 1 2
The sensitivity score reflects the extent to which a project would be adversely affected by exposure to a climate hazard. Exposure is rated on a scale of 1 to 5, with a score of 5 representing the greatest exposure.
The adaptive capacity of a project refers to its ability to manage and reduce vulnerabilities from projected climate hazards. Adaptive capacity is rated on a scale of 1 to 5, with a score of 5 representing the greatest ability to adapt.
The overall vulnerability scores are calculated based on the potential impacts and adaptive capacity assessments for each hazard. Scores include implementation of climate risk reduction measures.
7.3. Overall Health & Equity Scores
Metric Result for Project Census Tract
CalEnviroScreen 4.0 Score for Project Location (a) 97.0
Healthy Places Index Score for Project Location (b) 48.0
Project Located in a Designated Disadvantaged Community (Senate Bill 535) Yes
Project Located in a Low-Income Community (Assembly Bill 1550) Yes
Project Located in a Community Air Protection Program Community (Assembly Bill 617) No a: The maximum CalEnviroScreen score is 100. A high score (i.e., greater than 50) reflects a higher pollution burden compared to other census tracts in the state.
b: The maximum Health Places Index score is 100. A high score (i.e., greater than 50) reflects healthier community conditions compared to other census tracts in the state.
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