Appendix 4.1   Calculation of Dust Emission Factors

Sites

D1

D2

SAR

NAR

Spoil Quantity (m3)

330000

22280

8700

124165

9900

no of days

300

600

300

600

1050

Truck size

6

8

8

8

8

No of areas

7

3

1

3

2

Density (kg/m3)

1990

1990

1990

1990

1990

Handing (kg/hr)

199000.00

6717.76

5246.36

37437.63

1705.71

per site (kg/hr)

28428.57

2239.25

5246.36

12479.21

852.86

Trucks per hour

16.67

0.42

0.33

2.35

0.11

Round tip / hr

33.33

0.84

0.66

4.70

0.21

mixers (185trip/day)

Round tip/hr

33.64

total

66.97

Loading/Unloading (AP42, 5th ed., S13.2.4)

E = k*0.0016*(U/2.2)^1.3 / (M/2)^1.4

k

0.74

E=

0.000124711

kg/Mg

U

1

M

4.8

Emission rate (g/s)

9.85E-04

7.76E-05

1.82E-04

4.32E-04

2.95E-05

mitigate

50%

4.92E-04

3.88E-05

9.09E-05

2.16E-04

1.48E-05

Haul Road (AP42, 5ht ed., Section 13.2.2)

E = k ((s/12)^a) ((W/3)^b) / ((M/0.2)^c)

E =

4.041587667

lb/VMT

k

10

1.14E+03

g/VKT

a

0.8

b

0.5

c

0.4

s

10

W

15

M

10

1 lb/VMT  =  281.9 g/VKT

Emission rate (g/m/s)

2.12E-02

2.67E-04

2.09E-04

1.49E-03

6.78E-05

mitigate

97%

6.36E-04

8.01E-06

6.26E-06

4.47E-05

2.03E-06

Wind erosion (AP-42, 5th ed., Table 11.9.4)

0.85 Mg/heatre/year

Area

Line (12m width)

Line (16m width)

E=

2.69533E-06

g/m2/s

3.2344E-05

g/m/s

4.31253E-05

g/m/s

mitigate

50%

Area

Line (12m width)

Line (16m width)

E=

1.34767E-06

g/m2/s

1.6172E-05

g/m/s

2.15627E-05

g/m/s