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San Joaquin Valley APCD Road Modeling Using AERMOD

San Joaquin Valley APCD Road Modeling Using AERMOD. Road Modeling. Roadways & Commercial / Industrial Properties Diesel Travel, Idle, & TRU emissions. Residential project: Roadways (Major Arteries, Hwys, &Freeways) Commercial / Industrial operations

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San Joaquin Valley APCD Road Modeling Using AERMOD

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  1. San Joaquin Valley APCDRoad ModelingUsing AERMOD

  2. Road Modeling Roadways & Commercial / Industrial Properties • Diesel Travel, Idle, & TRU emissions. Residential project: • Roadways (Major Arteries, Hwys, &Freeways) • Commercial / Industrial operations (May include other emission sources) Mixed Use projects: • Can include all of the above. Contact District

  3. Diesel Truck Emissions • Truck Travel • Truck Idling • TRUs

  4. Series of Volume Sources Truck Traveling • Modeled as a Series of Volume Sources following the path of travel

  5. Volume Parameters • Height = Truck Height (assume 15 ft) • Initial Vertical Dimension = Height / 4.3 = 1.06 m • Width (W) = Truck Width (assume 12 ft) • Initial Lateral Dimension = 2W / 2.15 = 3.40 m • Release height = based on truck configuration. • Traveling Emission Factors = from EMFAC. • Site specific data should be used, if known.

  6. Truck Idling Modeled as a Point Source

  7. Diesel Idling Modeling Parameters Vertical Exhaust Stack Parameters: • Height = 3.84 meters • Diameter = 0.1 meters • Velocity = 51.71 m/s • Temperature = 366 K • Emission Factors derived from EMFAC run • Unit specific data should be used, if known

  8. Diesel Idling Modeling Parameters High Horizontal Exhaust Parameters: • Height = 3.84 meters • Diameter = 0.1 meters • Velocity = 0.001 m/s • Temperature = 366 K • Emission Factor derived from EMFAC run • Unit specific data should be used, if known

  9. Diesel Idling Modeling Parameters Low Horizontal Exhaust Parameters: • Height = 0.183 meters • Diameter = 0.1 meters • Velocity = 0.001 m/s • Temperature = 366 K • Emission Factor derived from EMFAC run • Unit specific data should be used, if known Under Truck

  10. TRU Emissions Modeled as a Point Source

  11. AERMOD TRU Stack Parameters • Height = 3.96 meters • Diameter = 0.04445 meters • Velocity = 49 m/s • Temperature = 501 K • Emission Factor = 0.76 g/BHP-hr • Unit specific data should be used, if known. Trailer

  12. Example Project

  13. Example Project Landfill Sources: • Composting • Expansion of Existing Landfill • Waste Recycling / Separation • Truck Unloading • Scale Area • Truck Travel • Truck Idling

  14. Questions

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