treasure valley road dust study: final report - ResearchGate

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Figure 4-5. TRAKER Loop 4.3.1 Temporal Changes in Paved Road Dust Emissions Data from the TRAKER loop are shown in Figure 4-6 as a time series of emissions potentials segregated by road class. The figure is split into a winter and a summer portion with the double vertical line delineating the two sampling seasons. Several trends are readily apparent. First, emissions potentials are highest for residentials and lowest for interstates. Figure 4-7 shows that the road speed strongly influences the emissions potential. Thus, high-speed roads such as interstates are likely to have lower emissions potentials than lower speed roads such as collectors. The second observation is that emissions potentials decrease steadily over time during the winter sampling period. We hypothesize that the steady decrease over the 18-day sampling period in winter is due to the slow removal of geologic material that is associated with winter conditions. The geologic material may be due to road sanding operations or carryout of mud from dirt lots or driveways. 4-16
Table 4-8. Turn-by-turn directions for TRAKER loop Action Approximate Distance Traveled on leg Park Center Dr. and Mallard: Starting Point; 1 mile Turn Right strip mall parking lot heading Northwest on Park Center Park Center Becomes Beacon 0.5 miles Beacon Becomes Protest 0.25 miles Rt turn onto Federal Way 0.75 miles Rt turn on Capitol Blvd 1 mile Rt turn onto Main St 1 mile Main St. becomes Warm Springs Rd. 0.5 miles Lt turn on Walnut St. 1 block Lt turn on Bannock St. 0.25 miles Rt turn on Bruce Ave 3 blocks Lt on McKinley St. 2 blocks Mckinley becomes Jefferson St. 0.25 miles Lt on 6th St. 2 blocks Rt on Front St. 0.75 miles Connector to I-84 Business 1 mile Connector becomes I-84 Business 2.5 miles I-84 Business Turns into I-84 2.5 miles Exit Eagle Rd. and turn Lt 2 miles Lt on Amity Rd. 0.25 miles Rt on Howry 0.25 miles Reverse Direction on Howry 0.25 miles Rt on Amity Rd. 1 mile Lt on Riva Ridge Dr. 1 mile Lt on Victory Rd. 0.25 miles Rt on Cloverdale Rd. 2.5 miles Rt on Fairview Ave. 1.2 miles Lt on Mitchell St, 1 mile Rt on Telfair 1000 ft Rt on Pinedale 300 ft Lt on Pepperwood Dr. 600 ft Bear Rt onto Altmore Dr. 300 ft Lt on Payson 100 ft Rt on Gurdon 50 ft Rt on Patton Ave. 100 ft Rt on Edna St. 0.25 miles Lt on Dalton Ln 0.25 miles Lt on Mcmillan Rd. 300 ft. Rt on Sunderland Dr. 0.4 miles Rt on SkyCliff (maybe) 300 ft Rt on Mountain View Dr. 0.2 miles Lt on Garrett 50 ft Rt on Chinden Blvd. (20/26) 4 miles Chinden Becomes Connector 0.75 miles Connector becomes Myrtle st. 1 mile Rt on Broadway Ave 0.75 miles Lt on Highland St. 0.25 miles End TRAKER Route in Huntington Apartments Parking Lot Table 4-9 shows an approximate schedule and amounts of sand used during the winter 2000-2001 season. As a matter of practice, the Ada County Highway District (ACHD) attempts to remove road sand by using street sweepers within 24 hours of application. However, authorities at the ACHD stated that due to substantial snowfall towards the end of January and beginning of February 2001, street sweepers had not been able to keep up with road sanding activities. Thus, in some areas, sand may have been present on the road surface for several 4-17
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TREASURE VALLEY ROAD DUST STUDY: FI
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EXECUTIVE SUMMARY The Idaho Departm
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TABLE OF CONTENTS 1. INTRODUCTION..
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6.3 DISCUSSION ....................
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are strongly correlated and that on
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Figure 4-17. Map of street sweeper
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xvi
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Table 5-3. Speeds and VKT by county
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Table A-28. Laboratory Silt Analysi
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?? To assess the impact of winterti
Page 25 and 26: 2. SILT MEASUREMENTS For this study
Page 27 and 28: vehicle tires. The lengths of the s
Page 29 and 30: Figure 2-1. Map of Sample Collectio
Page 31 and 32: Table 2-5 Silt Content and Silt Loa
Page 33: collectors. In contrast, summer sil
Page 36 and 37: 3.2 TRAKER Measurements For the TVR
Page 38 and 39: introduced by the carbon vanes insi
Page 40 and 41: 3.2.4.1 Data Acquisition The TRAKER
Page 42 and 43: Figure 3-6 shows the TRAKER coeffic
Page 44 and 45: 250 200 PM2.5 signal (mg/m 3 ) 150
Page 46 and 47: Line losses associated with the Dus
Page 48 and 49: 1.2 1 Left Diluted Right Diluted Pr
Page 50 and 51: Table 3-2. Regression exponents for
Page 52 and 53: 3.4.2 Flux Calculation from Meteoro
Page 54 and 55: 12.2 m 0.16 9.0 m 0.05 5.7 m 0.22 4
Page 56 and 57: 400 Ford Ranger on NS Road by DW1 4
Page 58 and 59: ceiling can be further stretched to
Page 60 and 61: 100 sL = 2.5717(T*) 0.4741 R 2 = 0.
Page 62 and 63: 4.1.1 Converting TRAKER Data Into E
Page 64 and 65: Table 4-1. (cont) GIS coverages use
Page 66 and 67: Table 4-1. (cont) GIS coverages use
Page 68 and 69: a. b. Figure 4-1. Map of TRAKER Str
Page 70 and 71: egressions, R 2 and P-values are al
Page 72 and 73: Summer - Ada - Rural Summer - Ada -
Page 74 and 75: The average emissions factor is 6.7
Page 78 and 79: weeks prior to being swept. While t
Page 80 and 81: 4.3.2 Meteorological Effects on Unp
Page 82 and 83: Section 1 Section 2 Section 3 Figur
Page 84 and 85: Figure 4-13. Johnston HSD mechanica
Page 86 and 87: Approximately 8 hours after the ini
Page 88 and 89: One-second emissions potentials (i.
Page 91 and 92: 5. EMISSIONS INVENTORIES FOR THE TR
Page 93 and 94: where E i.10 is the emissions in gr
Page 95 and 96: County Setting Road Class Speed (m/
Page 97 and 98: January, February, and March were u
Page 99 and 100: 5.1.3.2a January 1 - 9, 2000, 2010,
Page 101 and 102: Table 5-9 Precipitation and snow co
Page 103 and 104: complete link-level emissions inven
Page 105 and 106: Table 5-14. Distributions of averag
Page 107: Taken on an average annual basis, T
Page 110 and 111: Z n , K zn , ? c/ ? z n Z 3 , K z3
Page 112 and 113: Table 6-1. Aerodynamic particle siz
Page 114 and 115: 14 m 0 s 15 s 30 s 60 s 120 s 240 s
Page 116 and 117: Furthermore, the vertical profile o
Page 118 and 119: ?? Sieving each sample to obtain a
Page 120 and 121: 7-4 Table 7-1. Source Profile Key M
Page 122 and 123: Table 6-1 (continued). Table of geo
Page 124 and 125: Treasure Valley Road Dust Winter Pa
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7.3 Source Profile Summary This a p
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Table 7-4. Source profiles of Summe
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Table 7-6. Source profiles of Winte
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Bliss experiments were significant
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section was swept with a vacuum swe
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8.3 Differences Between Emissions M
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determine at this time what fractio
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sweepers to reduce PM 10 emissions
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McMahon T.A., and P.J. Denison (197
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Figure A-1. Map of Sample Collectio
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Table A-2. Summer 2001 Silt Samplin
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Table A-3. Laboratory Silt Analysis
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Figure A-3. Map of Silt Loading Loc
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Figure A-11. Sampling locations of
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APPENDIX B. BOISE PRECIPITATION AND
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Pecentile among days with precipita
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A.1 Wind speed The cumulative frequ
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APPENDIX C : EMISSIONS INVENTORIES:
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C.1.1.2a Field List for worksheets
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values specified by AP-42 and do no
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