Air Quality Issues Affecting Rosemont

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A presentation on the air quality issues associated with the Rosemont Copper project area developed by Applied Environmental Consulting. This presentation was given to the Forest Service and their contractors during technical transfer meetings in November 2008.

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Air Quality Issues Affecting Rosemont

  1. 1. AIR QUALITY ISSUES AFFECTINGROSEMONT COPPER COMPANY Prepared By:Applied Environmental Consultants, Inc. (AEC)
  2. 2. AEC RESPONSIBILITIES§  Conduct Background Particulate and Meteorological Monitoring§  Develop the Relevant Information and Conduct the Air Impact Analyses to Demonstrate that the Facility Complies with Environmental Air Quality Requirements§  Prepare Application for an Air Quality Permit, Interface with Appropriate Agencies to Address Air Quality Related Issues
  3. 3. PM10 MONITORING SITE
  4. 4. SUMMARY STATISTICS PM10 MEASUREMENTS (micrograms/m3) July 2006 – Sept. 2008 2006 2007 2008Highest 71.3 40.3 32.62nd High 27.0 28.7 28.23rd High 26.8 27.0 25.24th High 24.6 26.6 24.5Mean 16.1 10.8 12.7
  5. 5. METEOROLOGICAL SYSTEM
  6. 6. 2006 Wind Rose (April 1 – Dec. 31) WIND ROSE PLOT: DISPLAY: Rosemont Met Site Wind Speed April 1, 2006 to december 31, 2006 Direction (blowing from) NORTH 20% 16% 12% 8% 4% WEST EAST WIND SPEED (m/s) >= 10.1 8.5 - 10.1 7.0 - 8.5 5.5 - 7.0 3.9 - 5.5 SOUTH 2.4 - 3.9 1.9 - 2.4 1.4 - 1.9 1.0 - 1.4 Calms: 1.57% STATION NAME: Rosemont Project CALM WINDS: TOTAL COUNT: 1.57% 6371 hrs. AVG. WIND SPEED: 2.73 m/s WRPLOT View - Lakes Environmental Software
  7. 7. 2007 Wind Rose (Jan. 1 – Dec. 31) WIND ROSE PLOT: DISPLAY: Rosemont Met Site Wind Speed April 1, 2006 to December 31, 2006 Direction (blowing from) NORTH 20% 16% 12% 8% 4% WEST EAST WIND SPEED (m/s) >= 10.1 8.5 - 10.1 7.0 - 8.5 5.5 - 7.0 3.9 - 5.5 SOUTH 2.4 - 3.9 1.9 - 2.4 1.4 - 1.9 1.0 - 1.4 Calms: 1.97% STATION NAME: Rosemont Project CALM WINDS: TOTAL COUNT: 1.97% 7707 hrs. AVG. WIND SPEED: 2.77 m/s WRPLOT View - Lakes Environmental Software
  8. 8. AIR IMPACT ANALYSES AFFECTED AGENCIES§  PIMA COUNTY DEPARTMENT OF ENVIRONMENTAL QUALITY (PCDEQ) - Processes Application for an Air Quality Permit and Issues Permit§  FOREST SERVICE - Verifies Compliance with Non-Permit Issues, i.e. Protection of Air Quality Related Values
  9. 9. CONTENT OF PCDEQ APPICATION§  Description of Processes and Operations§  Identification of All Emission Units§  Identification of Maximum Process Rates and Pollution Controls§  Development of Maximum Hourly, Daily, Annual Emission Inventories§  Air Impact Analysis Demonstrating Protection of Applicable Standards§  Demonstration of Compliance with Applicable Emission Standards.
  10. 10. POLLUTANTS OF CONCERN§  Particulate Matter (PM, PM10, PM2.5)§  Sulfur Dioxide (SO2)§  Oxides of Nitrogen (NOx)§  Carbon Monoxide (CO)§  Volatile Organic Compounds (VOC)§  Hazardous Air Pollutants (HAP, 187 Species)
  11. 11. EMISSION SOURCES§  Mining Activities (Drilling, Blasting, Loading, Hauling, Unloading)§  Ore Processing Operations (Crushing, Screening, Milling, Conveying, Floatation, Product Shipment, etc.)§  Auxiliary Processes (Fuel Combustion Sources)§  Fugitive Emission Sources (Unpaved Roads, Stockpiles, Tailings)§  Mobile Sources (Tailpipe Emissions)
  12. 12. Example Process Flow Diagram w Hopper / Apron Feeder w Scrubber Legend Primary i Crusher Control device i i Controlled by device i UG UG Underground Surge UG Bin w Water Sprays w Process Flow Apron Air Flow w Conveyor Feeder Water Flow w Conveyor w Stacker Scrubber Stockpiles Wet Process 1 1 Conveyor Secondary 1 Secondary Grinding Mill Crusher Vibrating Feeders Oversize Hydrocyclone Water Set Conveyor Water Wet Wet Process Process Sump Pump Primary Vibrating Grinding Mill Screen To Floatation
  13. 13. EMISSION INVENTORIES•  Permits Are Issued Based on Max Emmis.•  Use Max. Process Rates (tph, tpy, hp, etc.)•  Select Representative Emission Factors or Rates (All Assumptions Must Be Substantiated) –  Regulatory Limits –  Manufacturer s Specifications –  Mass Balance –  Computerized EPA Software (TANKS) –  Emission Factors (EPA s AP-42)•  Select Representative Control Efficiencies & Calculate Emissions
  14. 14. AIR IMPACT ANALYSES§  Demonstrate Protection of Applicable Standards Starting at Process Area Boundary; Visibility at Class I Areas§  Averaging Times of 1-hour, 8-hour, 24-hour, Annual§  EPA Models –  SCREEN –  AERMOD –  VISCREEN –  PLUVUE –  CALPUFF§  Meteorological Data Requirements: 1-5 years§  Concurrent Upper Air Meteorological Data - NWS§  Modeling Protocol
  15. 15. CURRENT STATUS§  Continuation of Ambient Monitoring Programs§  Developing Templates for Emission Inventories§  Will Commence on Final Analyses Upon Completion of Final Mine Plan Specifications
  16. 16. QUESTIONS

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