1 / 53

WRAP Fugitive Dust Emission Summary and Evaluation (AoH Phase II/TSS Task 7b)

WRAP Fugitive Dust Emission Summary and Evaluation (AoH Phase II/TSS Task 7b). ENVIRON International Corporation 15 November 2005 Tempe, AZ. Outline. Project Objectives Fugitive Dust Source Categories Emission Estimation Methodologies 2002 Annual County-level Summaries

ellis
Download Presentation

WRAP Fugitive Dust Emission Summary and Evaluation (AoH Phase II/TSS Task 7b)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. WRAP Fugitive Dust EmissionSummary and Evaluation(AoH Phase II/TSS Task 7b) ENVIRON International Corporation 15 November 2005 Tempe, AZ

  2. Outline • Project Objectives • Fugitive Dust Source Categories • Emission Estimation Methodologies • 2002 Annual County-level Summaries • 2002 Annual Gridded Summaries • PM2.5/PM10 Ratios • Next Steps

  3. Project Objectives • Summarize all fugitive dust emission sources • Evaluate dust emissions for reasonableness and consistency • Review estimation methodologies (AP-42, State/local studies, regional models, etc..) • Review fine fraction (PM10/PM2.5) • Develop SCC-level summaries: • County-level • Model-ready, gridded • Develop summaries by geographic region • Consider 2002 and 2018 EIs

  4. Fugitive Dust Source Categories • Agricultural Dust • Harvesting • Tilling • Transport • Feedlots • Construction Dust • Mining/Quarrying • Road Construction • Residential • Industrial/Commercial/Institutional • Road Dust • Paved • Unpaved • Windblown Dust

  5. Estimation Methodologies • Agricultural Tilling • 2002 NEI grown from 1998 • Growth factors vary by tilling type (0.77 – 1.16) • Activity is acres tilled by type and crop (from CTIC) • EF = 4.8*k*s0.6*p • k=particle size multiplier (PM10 = 0.21; PM2.5 = 0.042) • S = silt content (USDA data; varies by soil type) • P = # of passes/tilling per year (varies by crop) • E = EF * A

  6. Estimation Methodologies • Construction – Residential • Emissions are function of acres disturbed and volume of soil excavated (varies by type of structure) • Activity data (housing starts by structure type) from Dept. of Commerce • Emission factors vary by structure type and duration of construction (0.011 tons PM10/acre-month – 0.11 tons PM10/acre-month) • Adjustments applied for soil moisture, silt content and control efficiency

  7. Estimation Methodologies • Construction – Non-Residential • Emissions are function of acres disturbed • Activity data (value of construction in $MM, allocated from national to county based on employment statistics) from Dept. of Commerce • Number of acres disturbed estimated as 1.55 acres/$MM applied to county-level construction valuation data • Emission factor = 0.19 tons/acre/month (assumed 11 month construction duration) • Adjustments applied for soil moisture, silt content and control efficiency

  8. Estimation Methodologies • Road Construction • Emissions are function of acres disturbed; developed from FHWA data • State-level new miles of road construction from 2002 FHWA state expenditure data by road type • Converted to $/mile using NCDOT conversion data; converted to acres disturbed/mile by road type • State data allocated to county based on residential building starts • Emission factor = 0.42 tons/acre/month; assumed 12 month duration • Adjustments applied for soil moisture, silt content and control efficiency

  9. Estimation Methodologies • Paved Road Dust • Uncontrolled emissions estimated at state level by roadway class and month • Calculated as State/Roadway class VMT * TAF * EF • Spatially allocated to counties based using VMT surrogate • Controls applied to Non-Attainment counties • EF = [k*(sL/2)0.65 *(W/3)1.5-C]*[1-P/(4*N)] • k= particle size multiplier (PM10 = 7.3;PM2.5 = 1.8) • sL = silt loading • W= avg. vehicle weight • C = EF for 1980 fleet • N= # days in month • P= # days with precip. > 0.01 in • Annual VMT data from FHWA Statistics • County emissions = State Emissions * (VMTcounty/VMTState) • Assumed control measure: Vacuum sweeping twice/month; 79% control efficiency.; Rule penetration varies by roadway class and NA status; 100% Rule Effectiveness

  10. Estimation Methodologies • Unpaved Road Dust • Uncontrolled emissions estimated at state level by roadway class and month • Calculated as State/Roadway class VMT * TAF * EF • Spatially allocated to counties based using 1990 rural population surrogate • Controls applied to Non-Attainment counties • EF = [k*(s/12)a *(SPD/30)b]/(M/0.5)c-C • k= particle size multiplier (PM10 = 0.27;PM2.5 = 1.8) • s = silt loading • SPD = mean vehicle speed • M = moisture content • C = EF for 1980 fleet • a,b,c = empirical constants • EF adjusted for precip: Efcorr= EF * [(D-p)/D)] • D = # days in month • P = # days with precip > 0.01 in.

  11. Estimation Methodologies • Unpaved Road Dust (continued) • Annual VMT data from FHWA Statistics • Separate estimates for county and non-county roadways • County-maintained VMT by road type and ADTV • State/Federal-maintained VMT by arterial classification; county-maintained VMT used • Annual VMT estimates allocated seasonally and monthly • County emissions = State Emissions * (Rural Pop.county/Rural Pop.State) • Assumed control measures vary by Non-Attainment classification (paving and/or chemical stabilization). Control efficiency, rule penetration and rule effectiveness vary

  12. Estimation Methodologies • Windblown Dust • WRAP Phase II WB Dust Model • 2000 Landuse/Landcover data • BELD3 county-level crop percentages • STATSGO Soils data • 2002 MM5 Meteorology (36- and 12-km) • Latest Transport Fractions (EPA, 2005) • PMC/PMF = 0.9/0.1

  13. RPO-Specific Revisions/Enhancements • WRAP • Road Dust – Developed by ENVIRON. • CA emissions interpolated from previous EI development • Unpaved VMT based on NET96 updated with state survey results • VMT data adjusted based on Clark Co. ADTV revisions factor • Silt loading from IL State Water Survey • Precipitation data from NCDC • Applicable control measures from State survey results • Agricultural Dust - Developed by ERG based on 2002 draft NEI (gap-filled by EPA/Pechan). Additional state submissions included as part of WRAP EI Update process. • Construction Dust - 2002 NEI estimates submitted by States

  14. RPO-Specific Revisions/Enhancements • CENRAP • Agricultural Dust – Developed by STI based on local activity data, county-level silt loading and tilling practices, monthly allocation by state. Includes some livestock feedlot dust emissions • Construction and Road Dust from 2002 NEI • VISTAS • 2002 NEI State submissions for all sources • MWRPO • Agricultural and Construction Dust (IL & IN only) - Based on 2002 State CERR data • Road Dust – WRAP 2002 inventory data • All Fugitive dust emissions dramatically reduce through application of transport fractions (90%-97%). Based on monitoring data analyzed by LADCO • MANE-VU • 2002 NEI for all dust sources

  15. 2002 Fugitive Dust Inventory

  16. 2002 Fugitive Dust Inventory

  17. 2002 Fugitive Dust Inventory

  18. 2002 Fugitive Dust Inventory

  19. 2002 Fugitive Dust Inventory

  20. 2002 Fugitive Dust Inventory

  21. 2002 Fugitive Dust Inventory

  22. 2002 Fugitive Dust Inventory

  23. 2002 Fugitive Dust Inventory

  24. 2002 Fugitive Dust Inventory

  25. 2002 Fugitive Dust Inventory

  26. 2002 Fugitive Dust Inventory

  27. 2002 Fugitive Dust Inventory

  28. 2002 Fugitive Dust Inventory

  29. 2002 Fugitive Dust Inventory

  30. 2002 Fugitive Dust Inventory

  31. 2002 Fugitive Dust Inventory

  32. 2002 Fugitive Dust Inventory

  33. 2002 Fugitive Dust Inventory

  34. 2002 Fugitive Dust Inventory

  35. Spatial Distribution of Fugitive Dust Emissions

  36. Spatial Distribution of Fugitive Dust Emissions

  37. Spatial Distribution of Fugitive Dust Emissions

  38. Spatial Distribution of Fugitive Dust Emissions

  39. Spatial Distribution of Fugitive Dust Emissions

  40. Spatial Distribution of Fugitive Dust Emissions

  41. Proposed Revisions to Fine Fraction RatiosUsed for AP-42 Fugitive Dust Emission Factors

  42. PM2.5/PM10 Ratios

  43. PM2.5/PM10 Ratios

  44. PM2.5/PM10 Ratios

  45. PM2.5/PM10 Ratios

More Related