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Wilmington Air Quality Study Modeling for Neighborhood Assessment

Wilmington Air Quality Study Modeling for Neighborhood Assessment. Todd Sax Vlad Isakov September 12, 2002. California Air Resources Board. Neighborhood Assessment. Program Objective

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Wilmington Air Quality Study Modeling for Neighborhood Assessment

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  1. Wilmington Air Quality StudyModeling for Neighborhood Assessment Todd Sax Vlad Isakov September 12, 2002 California Air Resources Board

  2. Neighborhood Assessment • Program Objective • “Develop source-receptor based, cumulative impact/risk assessment methodologies suitable for evaluating neighborhood-scale air pollution impacts and for comparing neighborhood exposures within a region” (NAP Work Plan) • Develop tools for evaluating local scale impacts and targeting risk reduction strategies September 12, 2002 California Air Resources Board

  3. Wilmington • Identified by MATES-II as one of the most impacted areas of the Los Angeles region • Located near • Freeways • Refineries • Ports • Local Traffic • Manufacturing • Local Facilities MATES-II Health Risk Wilmington September 12, 2002 (source: MATES-II, pg. ES-12)

  4. Wilmington Study Domain September 12, 2002 California Air Resources Board

  5. Wilmington Air Quality Study • Project Objectives • Improve assessment methodologies • Evaluate model results • Develop recommendations for policy development • Communicate results and risks to the public • Project Components • Emissions Inventory • Dispersion Modeling • Model Evaluation • Health Risk Assessment • Exposure Assessment September 12, 2002 California Air Resources Board

  6. Wilmington Neighborhood Assessment - Conceptual Plan • Emissions • Point Sources • Industrial • Metal platers • Refineries • Manufacturing Facilities • Other sources: Cr6+, DPM • Commercial • Gas stations • Dry cleaners • Autobody shops • Warehouses • Industrial diesel • Welding facilities • On-Road Sources • Link-based inventory • Evaluate with vehicle • counts • Off-Road Sources • Marine - Port, ARB • Dockside - Port, ARB • Railroads - ARB, Port • Health Risk • Modeling Results • Inhalation health risk • calculation • Multi-media health risk • calculation • Health risk assessment • Exposure • Microscale Modeling • ISCST3 • AERMOD • CALINE4 • Regional Modeling • CALGRID and/or CMAQ • Model Evaluation • Tracer Studies • June 2003 • Powerplant elevated release • Toxics Monitoring • Multiple sites, June 2003 • Focus on diesel particulate • Coordination with POLA • Uncertainty Assessment • Focus on diesel and Cr6+ • Estimate range of pollutant • concentrations possible using • Monte Carlo techniques • Inventory Analysis • Focus on diesel and Cr6+ • Examine by source and release point • Estimate range of possible emissions • using Monte Carlo techniques • Compile by release location

  7. Emissions Inventory • Goal: comprehensive emissions inventory • Industrial and Commercial Facilities • Comparing multiple inventory sources (Federal, State, Local) • Conducting on-site surveys of large and small facilities • On-Road Mobile Sources • Building link-based inventory using SCAG light and heavy duty travel demand models • Off-Road Mobile Sources • Supplementing off-road inventories with facility-specific emissions identified by survey • Working with Ports of Los Angeles and Long Beach in inventory development for sources of diesel PM • Integrating spatially allocated off-road emissions from multiple sources September 12, 2002 California Air Resources Board

  8. Emissions Inventory - Facilities • Over 2500 businesses in modeling domain • 195 facilities in CEIDARS • Multiple inventory databases • 240 facilities surveyed, ~50% have emissions • More surveys planned

  9. Emissions Inventory - Facilities • 195 facilities in CEIDARS • Corrected geo-locations • Integration with existing HRAs • Improved release locations and parameters • Sampled for data quality evaluation

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