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A Summary of St. Louis PM2.5 Source Apportionment

A Summary of St. Louis PM2.5 Source Apportionment. Sampling Network. All sites include FRM samplers for compliance Speciation Trends at Blair, Arnold, Alton, and Bonne Terre Species and other time resolved data - East St. Louis Supersite

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A Summary of St. Louis PM2.5 Source Apportionment

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  1. A Summary ofSt. Louis PM2.5Source Apportionment

  2. Sampling Network • All sites include FRM samplers for compliance • Speciation Trends at Blair, Arnold, Alton, and Bonne Terre • Species and other time resolved data - East St. Louis Supersite • Continuous Samplers at Blair, East St. Louis, Clayton, Arnold (recent) and Bonne Terre

  3. Key Points • Concentrations are high near the urban core and along the Mississippi River • Two sites are currently in violation of the annual PM2.5 standard, including East St. Louis, IL and Granite City, IL (high site) • Concentrations at Blair St are highest for Missouri

  4. St. Louis Source Apportionment Studiesin and near St. Louis • Hopke - PMF; STL Supersite, Blair STN, Arnold • MDNR - PMF; Blair St. STN, Arnold • STI - PMF; STL Supersite, Granite City FRM, Bondville • Schauer - PMF, CMB; STL Supersite

  5. MDNR Analysis

  6. Blair - Arnold PMF Factors Blair St STN Arnold

  7. Blair - Arnold PM2.5 Species Blair STN Arnold

  8. Blair Species by Qtr

  9. Emission Impact Potential – SO2/SO4

  10. Emission Impact Potential – NOx/NO3

  11. Emission Impact Potential – VOC/Organic Carbon

  12. Summary • Source Apportionments for sites where speciation data exists indicate several significant factors at all sites including: • Secondary Sulfate (Regional) • Secondary Nitrate • Motor Vehicles • Influences of other sources may vary, including steel smelting, copper production, and zinc production • One area where more data may be necessary is Granite City. Plans by OAQPS are underway to acquire source and nearby ambient samples and analyze resulting data to provide a better understanding of source factors at the Granite City neighborhood scale site.

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