Laer

Control

Efficiency,

Control

Efficiency,

Control

Efficiency,

Unpaved roads Wetting agent (water) Speed control

Active storage Wetting agent (water) piles

Pile orientation Leading slope angle Inactive storage Vegetation piles

Transfer points Water sprays

Conveyors

Water sprays

Car dumpers Water sprays

Construction Watering activities

50 Wetting agent 60-80 (other than water)

25-35 Drastic speed control 65-80 Soil stabilization 50 Apply gravel 50 Road carpet 80

50-75 Wetting agents 70-90

(other than water)

50-70 Pile orientation 50-70

35 Wind screens 60-80

65 Chemical stabilization 80-90

plus vegetation 35 Wetting agent sprays 55

Fogging sprays 80

35 Wetting agent sprays 55

Fogging sprays 80

35 Wetting agent sprays 40

Fogging sprays 75

50 Chemical stabilization 80

Paving and 85-90

sweeping

Encrusting agents 90-100

Tarp cover 100

Tarp cover 100

Enclosure 90-100

with sprays

Electrostatic- 80-95 enhanced fogging sprays (EEFS)

Enclosure 90-100

with sprays

EEFS 80-95

Enclosure 85-90

with sprays

EEFS 75-90

Enclosure 90

Source: H.E. Hesketh and F.L. Cross, Jr., 1983, Fugitive emission and controls (Ann Arbor, Mich.: Ann Arbor Science). RACT-Reasonable available control technology BACT-Best available control technology LAER-Lowest available emission rate

- ic « r 1,-ti,- i. 4J1.1.J FIG. 5.25.2 Diagram of a portable windscreen. (Reprinted,

FIG. 5.25.1 Complete truck tarp; tarp movement and hold- & r v r j t- in • t j ..l ■ ■ t a t i , . \ with permission, from C. Cowherd, Jr. and J.S. Kinsey, 1986, down system. (Reprinted, with permission, from Aero Industries.)

Identification, assessment, and control of fugitive particulate emissions, EPA 600/8-86-023, Research Triangle Park, N.C.: U.S. EPA.)

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