**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 2.18n/a 220.43 8.7 0.03958 195.2 168.0 931.3 11.64n/a 109.72 108.4 0.98803 158.9 136.2 1,070.3 2.46n/a 178.89 26.3 0.14719 162.0 139.1 360.1 3.49n/a 109.72 12.6 0.11454 170.2 137.2 367.1 0.04n/a 131.65 0.1 0.00112 160.7 137.2 681.5 2.68n/a 200.65 18.3 0.09102 162.9 140.6 1,137.7 0.16n/a 62.49 1.8 0.02913 155.4 138.5 505.2 7.01n/a 146.28 35.4 0.24210 166.1 139.5 1,052.1 6.35n/a 50.27 66.8 1.32888 163.6 141.8 506.7 2.14n/a 87.16 10.8 0.12440

Minimum 0.00112 Maximum 1.32888 Average 0.31060Equation 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 Averagek (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 0.04Unpaved 0.30315 0.03002 0.38791 1.47 0.15Unpaved 0.15965 0.01567 0.20435 2.22 0.04Unpaved 0.31450 0.03115 0.40243 0.81 0.23Unpaved 0.08055 0.00776 0.10316 1.66 0.29Unpaved 0.15802 0.01551 0.20226 8.21 0.20Unpaved 0.84371 0.08408 1.07941 0.24 0.06Unpaved 0.03095 0.00280 0.03972 2.94 0.04Unpaved 0.41664 0.04137 0.53309 4.65 0.09Unpaved 0.56046 0.05575 0.71707 4.99 0.05Unpaved 0.67656 0.06736 0.86559

0.24 0.04Average 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 3.32n/a Local 186.47 16.0 0.08565 1,110.55 2.29n/a Local 91.41 25.4 0.27822 449.50 3.80n/a Minor Arterial 109.69 17.1 0.15572 1,570.85 1.74n/a Rural Minor Collector 137.11 27.3 0.19935 1,010.10 3.04n/a Local 137.11 30.7 0.22396 1,378.10 1.63n/a Local 109.69 22.5 0.20479 598.87 1.77n/a Principal Arterial 68.56 10.6 0.15462 3,577.85 1.50n/a Principal Arterial 82.27 53.7 0.65236 3,156.25 0.78n/a Rural Minor Collector 120.66 24.6 0.20404 280.45 2.20n/a Local 47.53 6.2 0.12981

Minimum 0.08565 Maximum 0.65236 Average 0.22885Equation 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 8,450n/a Benjamin Flores between Calle 18 and Calle 21 6,150n/a Calle 17 between Avenida Camelias and Avenida Flores 6,675n/a Avenida Jalisco between Calle 13 and Calle 15 6,175n/a Avenida Mexico between Calle General Yucupicio and Calle Cuauhtemoc 5,050n/a Avenida Pedro Bribiesca between Calle 13 and Calle 16 5,200n/a Avenida Tlaxcala between Calle 35 and Calle 38 5,125n/a Calle 20 between Avenida Hidalgo and Avenida Kino 5,175n/a Calle Paraguay between Avenida Escuadron 201 and Avenida Reforma 6,175n/a Avenida Dominican between Avenida San Esteban and Avenida San Amadeo 528n/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 1,560.3Unpaved 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 0.35Unpaved 0.06054 0.00576 n/a n/a 0.34 0.17Unpaved 0.05400 0.00511 n/a n/a 0.52 0.03Unpaved 0.11736 0.01144 n/a n/a 0.82 0.14Unpaved 0.13606 0.01331 n/a n/a 0.46 0.09Unpaved 0.08321 0.00803 n/a n/a 0.60 0.16Unpaved 0.09681 0.00939 n/a n/a 0.87 0.57Unpaved 0.10893 0.01060 n/a n/a 1.14 0.03Unpaved 0.25781 0.02549 n/a n/a 1.85 0.11Unpaved 0.32274 0.03198 n/a n/a 0.60 0.14Unpaved 0.09944 0.00965

Minimum 0.34 0.03 Maximum 1.85 0.57 Average 0.76 0.18 0.13369 0.013071.8

0.18 1 0.2 0.5 25Field 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