Bulk Material Handling

These photographs show front-end loaders dumping dirt into haul trucks. No dust control methods are being used.

Untarped Trucks

These trucks are leaving a construction site without a tarp covering their load. This is a violation of Maricopa County Air Quality Rule 310.

Trackout

When work sites exit onto a paved roadway it is required to install trackout control devices to help prevent particulate matter from adhering to the tires and exterior surfaces of vehicles. When trackout exceeds a linear distance of 50 feet it is required to be cleaned-up immediately. See Maricopa County Rule 310 .

Weed Abatement

It is required to apply water before and during weed abatement by discing or blading activities. If the visible emission of dust exceeds 20% opacity it is also a violation.

Example of opacity readings in a grayscale

Wind Blown Dust

Vacant lots and open areas are required to be stabilized against fugitive dust emissions. Some control measures to stabilize an area include preventing access to motor vehicles, installing vegetative cover, applying surface gravel, or applying a dust suppressant to disturbed areas. See Maricopa County Rule 310.01 for more information.