Paved Road Dust

Site Label Length (ft) Width (ft)

1 237.29 10

2 118.11 10

3 192.57 10

4 118.11 10

5 141.72 10

6 216.00 10

7 67.27 10

8 157.47 10

9 54.12 10

10 93.83 10

Paved Road Dust Emissions from Salvador

PM10 (Mg/yr) PM2.5 (Mg/yr)

4,182.0 383.0

PM10 (ton/yr) PM2.5 (ton/yr)

4,609.8 422.2
Description

Total 

Sample 

(incl. Bag) 

(g)

Calzada Lázaro Cárdenas between Calzada Benito Juárez and Calzada Venustiano Carranza 538.9

Calzada Independencia between Boulevard Adolfo López Mateos and Calle Río Culiacán 1,099.3

Calzada Industrial Palaco between Calzada M. Gómez Morin and Calzada Lázaro Cárdenas 1,206.5

Francisco I. Madero between Calle Justo Sierra and Calle "F" 499.2

Calzada Anahuac between Avenida Torino and Avenida Gobernador 504.3

Avenida Oaxaca between Calle Uxmal and Heroico Colegio Militar 818.7

Calle Río Mocorito between Calzada Cuauhtémoc and Avenida F. Montes de Oca 1,278.3

Calzada Laguna de Xochimilco between Calzada Anahuac and Granada 643.7

Avenida Río Verde between Calle Cuarta and Calle Novena 1,191.6

Avenida Centauro del Norte between Calzada Lázaro Cárdenas and Calzada Héctor Terán Terán 648.5

Average
Bag Weight 

(g)

Bag Tare 

(g)

Sample 

minus 

Tare (g) Silt (%) Moisture (%) Area (m^2) Total Silt (g) Silt Loading (g/m^2)

163.3 138.7 400.2 2.18 n/a 220.43 8.7 0.03958

195.2 168.0 931.3 11.64 n/a 109.72 108.4 0.98803

158.9 136.2 1,070.3 2.46 n/a 178.89 26.3 0.14719

162.0 139.1 360.1 3.49 n/a 109.72 12.6 0.11454

170.2 137.2 367.1 0.04 n/a 131.65 0.1 0.00112

160.7 137.2 681.5 2.68 n/a 200.65 18.3 0.09102

162.9 140.6 1,137.7 0.16 n/a 62.49 1.8 0.02913

155.4 138.5 505.2 7.01 n/a 146.28 35.4 0.24210

166.1 139.5 1,052.1 6.35 n/a 50.27 66.8 1.32888

163.6 141.8 506.7 2.14 n/a 87.16 10.8 0.12440

Minimum 0.00112

Maximum 1.32888

Average 0.31060
Equation Parameters k (PM-10) (lbs/VMT) 0.016

k (PM-2.5) (lbs/VMT) 0.0024

W (avg. vehicle weight - paved) (tons) 3.18

C (PM-10) (lb/VMT) 0.00047

C (PM-2.5) (lb/VMT) 0.00036

Days in year 365

Precipitation days in year 21

Precipitation adjustment 0.98562

Annual PM10 EF 

(lbs/VMT) Annual PM2.5 EF (lbs/VMT)

0.00088 0.00000

0.01042 0.00128

0.00269 0.00012

0.00222 0.00005

0.00000 0.00000

0.00185 0.00000

0.00064 0.00000

0.00390 0.00030

0.01273 0.00162

0.00237 0.00007

0.00377 0.00034
Unpaved Road Dust

Unpaved Parameters

Site Label Description

A Calle Caoba between Calle Mauto and Calle Olivo

B Calle Mérida between Avenida Nayarit and Avenida Puebla

C Avenida Río Atoyac between Calle Onceava and Calle Treceava

D Avenida Camino Real between Avenida Campestre and Avenida Valle Verde

E Calle Texcoco between Calzada Laguna de Xochimilco and Avenida Acolman

F General Jesus M. Garza at Calle Federación

G Avenida Ricardo Flores Magón between Calle Bernardo Reyes and Calle Filomeno Mata

H Calle de las Delicias between Avenida de los Insurgentes and Avenida Juan Álvarez

I Calle Venustiano Carranza between Avenida Nuevo León and Avenida Querétaro

J Carretera Relleno Sanitario

Minimum

Maximum

Average
k (PM-10) (lbs/VMT) 1.8

k (PM-2.5) (lbs/VMT) 0.18

a (PM-10 and PM-2.5) 1

c (PM-10 and PM-2.5) 0.2

d (PM-10 and PM-2.5) 0.5

S (urban) (mph) 11

S (suburban) (mph) 18

S (rural) (mph) 25

C (PM-10) (lb/VMT) 0.00047

C (PM-2.5) (lb/VMT) 0.00036

Days in year 365

Precipitation days in year 21

Precipitation adjustment 0.94247

Urban Suburban

Silt (%) Moisture (%) Road Description

PM10 EF 

(lbs/VMT)

PM2.5 EF 

(lbs/VMT)

PM10 EF 

(lbs/VMT)

2.14 0.04 Unpaved 0.30315 0.03002 0.38791

1.47 0.15 Unpaved 0.15965 0.01567 0.20435

2.22 0.04 Unpaved 0.31450 0.03115 0.40243

0.81 0.23 Unpaved 0.08055 0.00776 0.10316

1.66 0.29 Unpaved 0.15802 0.01551 0.20226

8.21 0.20 Unpaved 0.84371 0.08408 1.07941

0.24 0.06 Unpaved 0.03095 0.00280 0.03972

2.94 0.04 Unpaved 0.41664 0.04137 0.53309

4.65 0.09 Unpaved 0.56046 0.05575 0.71707

4.99 0.05 Unpaved 0.67656 0.06736 0.86559

0.24 0.04 Average 0.35442 0.03515 0.45350

8.21 0.29

2.93 0.12

Unpaved Road Dust Emissions from Salvador

PM10 (Mg/yr) PM2.5 (Mg/yr)

38,403.0 3,819.0

PM10 (ton/yr) PM2.5 (ton/yr)

42,331.3 4,209.7
Rural

PM2.5 EF 

(lbs/VMT)

PM10 EF 

(lbs/VMT)

PM2.5 EF 

(lbs/VMT)

0.03850 0.45724 0.04543

0.02014 0.24091 0.02380

0.03995 0.47435 0.04714

0.01002 0.12165 0.01187

0.01993 0.23844 0.02355

0.10765 1.27217 0.12692

0.00368 0.04689 0.00439

0.05301 0.62833 0.06254

0.07141 0.84516 0.08422

0.08626 1.02018 0.10172

0.04505 0.53453 0.05316
SLRC Road Dust Emission Factors - Paved Road Dust

Sample Dimensions

Site Label Length (ft) Width (ft)

P01 200.736 10

P02 98.4 10

P03 118.08 10

P04 147.6 10

P05 147.6 10

P06 118.08 10

P07 73.8 10

P08 88.56 10

P09 129.888 10

P10 51.168 10

SLRC Mexicali

Daily VMT 413,111 817,836

Annual VMT 150,785,515 298,510,140

Annual PM10 (tons/yr) 270.8 536.2

Annual PM2.5 (tons/yr) 19.3 38.2

Spring PM10 (pounds/day) 1,493.4 2,956.4

Spring PM2.5 (pounds/day) 106.3 210.4

Summer PM10 (pounds/day) 1,472.9 2,915.9

Summer PM2.5 (pounds/day) 104.8 207.5

Fall PM10 (pounds/day) 1,497.4 2,964.3

Fall PM2.5 (pounds/day) 106.6 211.0

Winter PM10 (pounds/day) 1,468.0 2,906.2

Winter PM2.5 (pounds/day) 104.5 206.8
Description Comment

Total 

Sample (g)

Bag Weight 

(g)

Bag Tare 

(g)

Avenida Obregon between Calle 48 and Parq Industrial 528 53.20 46.56

Calle 42 between Avenida Durango and Avenida Tlaxcala 1,158 55.30 47.45

Avenida Obregon between Calle 8 and Calle 11 497 54.20 47.50

Calle 2 between Avenida Juarez and Avenida Felix Contreras 1,618 65.30 47.15

Avenida Constitucion between Calle Rio Verde and Calle Rio Paxtla 1,056 60.80 45.90

Avenida Nuevo Leon between Calle 28 and Calle 32 1,425 53.00 46.90

Avenida Jazmin between Calle 18 and Calle 22 646 56.80 46.63

Avenida Libertad between Calle 28 and Calle 32 3,625 64.60 47.15

Calle 7 between Avenida Tlaxcala and Avenida Quintana Roo 3,200 54.90 43.75

Avenida Monterrey between Calle 3 and Calle 10 328 57.20 47.55
Sample 

minus 

Tare (g) Silt (%) Moisture (%) Road Description Area (m^2) Total Silt (g) Silt Loading (g/m^2)

481.04 3.32 n/a Local 186.47 16.0 0.08565

1,110.55 2.29 n/a Local 91.41 25.4 0.27822

449.50 3.80 n/a Minor Arterial 109.69 17.1 0.15572

1,570.85 1.74 n/a Rural Minor Collector 137.11 27.3 0.19935

1,010.10 3.04 n/a Local 137.11 30.7 0.22396

1,378.10 1.63 n/a Local 109.69 22.5 0.20479

598.87 1.77 n/a Principal Arterial 68.56 10.6 0.15462

3,577.85 1.50 n/a Principal Arterial 82.27 53.7 0.65236

3,156.25 0.78 n/a Rural Minor Collector 120.66 24.6 0.20404

280.45 2.20 n/a Local 47.53 6.2 0.12981

Minimum 0.08565

Maximum 0.65236

Average 0.22885
Equation Parameters k (PM-10) (lbs/VMT) 0.016

k (PM-2.5) (lbs/VMT) 0.0024

W (avg. vehicle weight - paved) (tons) 3.18

C (PM-10) (lb/VMT) 0.00047

C (PM-2.5) (lb/VMT) 0.00036

Annual Precip. Adjustment 0.98562

Spring Precip. Adjustment 0.99185

Summer Precip. Adjustment 0.97826

Fall Precip. Adjustment 0.99451

Winter Precip. Adjustment 0.97500

Annual PM10 EF 

(lbs/VMT) Annual PM2.5 EF (lbs/VMT)

Spring 

PM10 EF 

(lbs/VMT)

Spring 

PM2.5 EF 

(lbs/VMT)

Summer 

PM10 EF 

(lbs/VMT)

Summer 

PM2.5 EF 

(lbs/VMT)

0.00176 0.00000 0.00177 0.00000 0.00174 0.00000

0.00431 0.00036 0.00434 0.00036 0.00428 0.00036

0.00281 0.00014 0.00283 0.00014 0.00279 0.00014

0.00338 0.00022 0.00340 0.00022 0.00336 0.00022

0.00368 0.00027 0.00371 0.00027 0.00366 0.00027

0.00345 0.00023 0.00347 0.00023 0.00342 0.00023

0.00280 0.00013 0.00281 0.00013 0.00278 0.00013

0.00785 0.00089 0.00790 0.00090 0.00779 0.00088

0.00344 0.00023 0.00346 0.00023 0.00341 0.00023

0.00245 0.00008 0.00246 0.00008 0.00243 0.00008

0.00359 0.00026 0.00361 0.00026 0.00357 0.00025
Fall PM10 

EF 

(lbs/VMT)

Fall PM2.5 

EF 

(lbs/VMT)

Winter 

PM10 EF 

(lbs/VMT)

Winter 

PM2.5 EF 

(lbs/VMT)

0.00177 0.00000 0.00174 0.00000

0.00435 0.00036 0.00427 0.00036

0.00284 0.00014 0.00278 0.00013

0.00341 0.00022 0.00335 0.00022

0.00372 0.00027 0.00364 0.00026

0.00348 0.00023 0.00341 0.00023

0.00282 0.00014 0.00277 0.00013

0.00792 0.00090 0.00776 0.00088

0.00347 0.00023 0.00340 0.00023

0.00247 0.00008 0.00242 0.00008

0.00362 0.00026 0.00355 0.00025
SLRC Road Dust Emission Factors - Unpaved Road Dust

Site Label

UP01

UP02

UP03

UP04

UP05

UP06

UP07

UP08

UP09

UP10
Description Comment

Total 

Sample (g)

Split Dry 

Sample (g)

Benjamin Flores between Calle 7 and Calle 12 8,450 n/a

Benjamin Flores between Calle 18 and Calle 21 6,150 n/a

Calle 17 between Avenida Camelias and Avenida Flores 6,675 n/a

Avenida Jalisco between Calle 13 and Calle 15 6,175 n/a

Avenida Mexico between Calle General Yucupicio and Calle Cuauhtemoc 5,050 n/a

Avenida Pedro Bribiesca between Calle 13 and Calle 16 5,200 n/a

Avenida Tlaxcala between Calle 35 and Calle 38 5,125 n/a

Calle 20 between Avenida Hidalgo and Avenida Kino 5,175 n/a

Calle Paraguay between Avenida Escuadron 201 and Avenida Reforma 6,175 n/a

Avenida Dominican between Avenida San Esteban and Avenida San Amadeo 528 n/a

SLRC Mexicali

Daily VMT 61,143 124,975

Annual VMT 22,317,195 45,615,875

Annual PM10 (tons/yr) 1,491.8 3,049.2

Annual PM2.5 (tons/yr) 145.9 298.2

Spring PM10 (pounds/day) 8,390.3 17,149.7

Spring PM2.5 (pounds/day) 820.5 1,677.1

Summer PM10 (pounds/day) 7,919.0 16,186.2

Summer PM2.5 (pounds/day) 774.4 1,582.9

Fall PM10 (pounds/day) 8,482.5 17,338.1

Fall PM2.5 (pounds/day) 829.5 1,695.6

Winter PM10 (pounds/day) 7,805.8 15,955.0

Winter PM2.5 (pounds/day) 763.4 1,560.3
Unpaved Parameters k (PM-10) (lbs/VMT)

k (PM-2.5) (lbs/VMT)

a (PM-10 and PM-2.5)

c (PM-10 and PM-2.5)

d (PM-10 and PM-2.5)

S (mph)

C (PM-10) (lb/VMT)

C (PM-2.5) (lb/VMT)

Annual Precip. Adjustment

Spring Precip. Adjustment

Summer Precip. Adjustment

Fall Precip. Adjustment

Winter Precip. Adjustment

<200 

Mesh (g)

Trapped 

Dust 

Residue (g) Silt (%)

Moisture 

(%) Road Description

Annual PM10 EF 

(lbs/VMT) Annual PM2.5 EF (lbs/VMT)

n/a n/a 0.44 0.35 Unpaved 0.06054 0.00576

n/a n/a 0.34 0.17 Unpaved 0.05400 0.00511

n/a n/a 0.52 0.03 Unpaved 0.11736 0.01144

n/a n/a 0.82 0.14 Unpaved 0.13606 0.01331

n/a n/a 0.46 0.09 Unpaved 0.08321 0.00803

n/a n/a 0.60 0.16 Unpaved 0.09681 0.00939

n/a n/a 0.87 0.57 Unpaved 0.10893 0.01060

n/a n/a 1.14 0.03 Unpaved 0.25781 0.02549

n/a n/a 1.85 0.11 Unpaved 0.32274 0.03198

n/a n/a 0.60 0.14 Unpaved 0.09944 0.00965

Minimum 0.34 0.03

Maximum 1.85 0.57

Average 0.76 0.18 0.13369 0.01307
1.8

0.18

1

0.2

0.5

25 Field observation

0.00047

0.00036

0.94247

0.96739

0.91304

0.97802

0.90000

Spring 

PM10 EF 

(lbs/VMT)

Spring PM2.5 EF 

(lbs/VMT)

Summer 

PM10 EF 

(lbs/VMT)

Summer 

PM2.5 EF 

(lbs/VMT)

Fall PM10 

EF 

(lbs/VMT)

Fall PM2.5 

EF 

(lbs/VMT)

Winter 

PM10 EF 

(lbs/VMT)

Winter 

PM2.5 EF 

(lbs/VMT)

0.06214 0.00591 0.05865 0.00558 0.06282 0.00598 0.05781 0.00550

0.05543 0.00524 0.05232 0.00495 0.05604 0.00530 0.05157 0.00488

0.12046 0.01174 0.11369 0.01108 0.12178 0.01187 0.11207 0.01093

0.13966 0.01366 0.13181 0.01290 0.14120 0.01381 0.12993 0.01271

0.08541 0.00824 0.08061 0.00778 0.08635 0.00833 0.07946 0.00766

0.09937 0.00963 0.09378 0.00909 0.10046 0.00974 0.09244 0.00896

0.11181 0.01088 0.10553 0.01027 0.11304 0.01100 0.10402 0.01012

0.26463 0.02616 0.24976 0.02469 0.26753 0.02645 0.24619 0.02434

0.33128 0.03283 0.31267 0.03098 0.33492 0.03319 0.30820 0.03054

0.10207 0.00990 0.09633 0.00935 0.10319 0.01001 0.09496 0.00921

0.13722 0.01342 0.12952 0.01267 0.13873 0.01357 0.12767 0.01248