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Maricopa County Dust Control For more information on Maricopa Countys Fugitive
Dust Program, please call
602-506-6010 or visit us on the web at
www.maricopa.gov/aq/
RULE 310
As a result, the Maricopa Association of Governments
(MAG) is required to develop and implement a 5%
Reduction Plan indicating what measures will be taken
to meet the PM-10 Health Standards.

The Maricopa County Air Quality Department Rule
310 contains the requirements that construction
projects and others must follow to prevent dust
emissions. The explanations, examples, and
suggestions contained in this brochure are presented as
a guideline and do not cover all aspects of the rule.
Please refer to Rules 200 and 310 for the detailed
requirements; these may be found at
www.maricopa.gov/aq.

Maricopa County
Dust Control



Maricopa County
Air Quality Department
www.maricopa.gov/aq
LEGAL REQUIREMENTS
M

aricopa County does not meet the Federal
Health Standards for ambient air
concentrations of particulate matter (which
includes dust).
DUST CONTROL PERMITS
A dust control permit is required for any dust generating
operation disturbing 0.1 acres (4,356 sq. ft.) or more for
commercial, industrial, institutional or government
purposes. Permits are valid for one year and must be
maintained until final stabilization of the disturbed area is
achieved. If a permit isnt required, dust control measures
must still be met.

The Business Resource Center (BRC) is a
program of the Maricopa County Air Quality
Department. The primary purpose of the BRC is
to assist small businesses that are or will be
subject to requirements under the Federal 1990
Clean Air Act Amendment.

Please call 602-506-5102
For more information.

Obtain a permit - The property owner, lessee,
developer, or general/prime contractor must submit
a permit application with a dust control plan and
obtain a permit for all dust generating jobs that will
disturb at least one-tenth of an acre or 4,356 square
feet. Dust control plans must include primary and
contingency measures. For more information about
obtaining a permit, contact One Stop Shop at 602-
372-1071 or visit them at 501 N. 44th Street, Suite
200, Phoenix, AZ 85004.


Implement the dust control plan - Before work
commences, the responsible party for a site must
maintain dust control measures on the site at all
times. Each job site must have its own permit and
plan.

Be sure you and your subcontractors understand all
of the responsibilities in the dust control plan. Have
the permit and dust control plan available at the job
site. If you are a subcontractor, ask for a copy of the
dust control plan and permit before you start work.
Enforcement action is taken against the permit
holder or subcontractor for violations which occur
on the permitted work site.


Prevent dust from exceeding visible emission

limitations - Rule 310 prohibits visible emissions
from exceeding 20% opacity.


Implement dust control contingency measures - If
the primary dust control measures in the dust control
plan prove to be ineffective, the contingency dust
control measures must be implemented. One
contingency dust control measure is to stop work
until primary control measures can re-establish
control.


Monitoring - Monitor and record the construction
activities frequently to assure the dust control plan is
being implemented. A sample format for keeping
the required daily dust control records can be
obtained from the county on the departments
website at www.maricopa.gov/aq. Be continuously
aware of trackout control device and trackout
conditions Initiate clean up proactively. Keep notes
on what activities are occurring at the site.


Tarping - Ensure that all haul trucks containing bulk
material are tarped when they exit a worksite.

SOME THINGS INSPECTORS LOOK FOR
DURING DUST COMPLIANCE INSPECTIONS

Implementation of soil surface stabilization
measures - dust control measures must be in place
at all times, including on weekends to maintain or
create a stable or crusted soil surface.

Permit available on-site - the permit and dust
control plan must be available for review on-site
at all times; applicable to dust control records if
kept on-site.

Trackout control device at construction exits - all
sites larger than two acres must have an effective
track-out control device at all construction exit
points. This includes haul operations moving
>100 cubic yards of material per day.

Haul trucks tarped - all haul trucks must be
effectively covered with a tarp or another suitable
enclosure. In addition, when leaving, trucks must
be washed out or tarped.

Immediately clean-up trackout that extends more
than 50 feet from the worksite exit(s).

Fugitive dust from equipment or haul roads - use
water to spray the equipment or area to avoid
having fugitive dust.

Project signs - project signs must be posted and
display current information for all sites five acres
or larger, including a permit number and contact
information for permittee.

Weed abatement activities - apply water before,
during, and after weed abatement.

Water availability and application - water
application systems need to be available on-site at
all times in order to properly water and maintain a
compliant work site.

TRAINING AVAILABLE

The Dust Compliance Division offers two monthly
training sessions to assist in achieving compliance
with dust control regulations. The Dust Control
Applications course covers the required elements
of a complete application. The Dust Control
Training course teaches the basic requirements of
Rule 310. Each session is designed to last about
an hour. For course dates and times or to RSVP
for a training session, contact the Maricopa County
Air Quality Department at 602-372-1467. Watering is a very effective dust suppressant. When applied
regularly, water provides temporary stabilization to disturbed
surface areas. Some suggestions:

PRIOR TO ANY ACTIVITY ON SITE -

Wet the areas to depth of cuts or equipment penetration.

AFTER CLEARING AN AREA -

Apply water with sufficient frequency to prevent visible
emissions (at least every two hours).

Automatic sprinkler/spray bar systems are optional in
these areas.

DURING ACTIVE OPERATIONS -

Apply water 15-30 minutes before starting operations.

Apply water at the end of the day (e.g. soak overnight
the next days work area).

Use a water truck while grading.

Use a fine spray or mist when trenching.

Mist material after it drops from the
screen when
screening.

Water should be applied in front of equipment.
Thinking of dust control prior to project start-up can save
time, money and project resources. Phase your project
and plan your site layout to minimize disturbance of the
soil. Actions to consider include:

Make sure everyone working on the job knows who
is in charge and all the requirements for dust control.

Limit the amount of area graded at one time. The
less acreage of disturbed surface area on-site, the
less you have to control and the less water or
chemical dust suppressant you need.

Install wind fences or barriers (<50% porosity).
Place barriers around storage piles, parking, and
equipment staging areas.

Develop semi-permanent staging areas to cut down
on the amount of disturbed area.

Restrict access on unpaved areas to vehicles and
equipment that are necessary that day. Limit






unnecessary travel on unpaved surface areas.

Re-stabilize disturbed surfaces by paving permanent
roads and restoring vegetation as soon as possible.



SITE PLANNING
TRACKOUT CONTROL DEVICE
EFFECTIVE WATER USE
For Unpaved Haul Roads/Access Roads/Equipment
Paths -

Apply water in sufficient quantity to maintain a moist
surface.


Do not over water - muddy conditions increase
trackout.


Water Penetration - Surfactants added to water
increase penetration.


Consider dust suppressants/palliatives for
long-term haul roads.
MATERIALS HANDLING
Material handling refers to many types of dust generating
activities on construction sites, but includes loading and
hauling.
LOADING:
Mist material with water while stacking.
Mix excavated material with water prior to