310–1

REGULATION III – CONTROL OF AIR CONTAMINANTS

RULE 310

FUGITIVE DUST FROM DUST-GENERATING OPERATIONS

INDEX

SECTION 100 – GENERAL

101 PURPOSE

102 APPLICABILITY

103 EXEMPTIONS

SECTION 200 – DEFINITIONS

201 AREA A

202 AREA ACCESSIBLE TO THE PUBLIC

203 BULK MATERIAL

204 BULK MATERIAL HANDLING, STORAGE, AND/OR TRANSPORTING

OPERATION

205 CONTROL MEASURE

206 DISTURBED SURFACE AREA

207 DUST CONTROL IMPLEMENT

208 DUST CONTROL PLAN

209 DUST-GENERATING OPERATION

210 DUST SUPPRESSANT

211 EARTHMOVING OPERATION

212 EMERGENCY

213 EMERGENCY ACTIVITY

214 END OF WORKDAY

215 FREEBOARD

216 FUGITIVE DUST

217 GRAVEL PAD

218 GRIZZLY

219 HAUL TRUCK

220 MOTOR VEHICLE

221 NORMAL FARM CULTURAL PRACTICE
310–2

222 OFF-ROAD VEHICLE

223 OPEN STORAGE PILE

224 OWNER AND/OR OPERATOR

225 PAVE

226 PROPERTY LINE

227 ROUTINE

228 SILT

229 TRACKOUT/CARRYOUT

230 TRACKOUT CONTROL DEVICE

231 UNPAVED HAUL/ACCESS ROAD

232 UNPAVED PARKING LOT

233 UNPAVED ROAD

234 WIND-BLOWN DUST

235 WORK SITE

SECTION 300 – STANDARDS

301 GENERAL REQUIREMENTS FOR DUST-GENERATING OPERATIONS

302 PERMIT REQUIREMENTS FOR DUST-GENERATING OPERATIONS

303 VISIBLE EMISSIONS REQUIREMENTS FOR DUST-GENERATING

OPERATIONS

304 STABILIZATION REQUIREMENTS FOR DUST-GENERATING

OPERATIONS

305 CONTROL MEASURES FOR DUST-GENERATING OPERATIONS

306 TRACKOUT, CARRY-OUT, SPILLAGE, AND/OR EROSION

307 SOIL MOISTURE

308 PROJECT INFORMATION SIGN FOR DUST-GENERATING OPERATIONS

309 DUST CONTROL TRAINING CLASSES FOR DUST-GENERATING

OPERATIONS

310 DUST CONTROL COORDINATOR FOR DUST-GENERATING

OPERATIONS

SECTION 400 – ADMINISTRATIVE REQUIREMENTS

401 DUST CONTROL PERMIT REQUIREMENTS

402 DUST CONTROL PLAN REQUIREMENTS
310–3

403 DUST CONTROL PLAN REVISIONS

404 DUST CONTROL BLOCK PERMIT REQUIREMENTS

405 APPROVAL OR DENIAL OF PERMIT APPLICATIONS FOR DUSTGENERATING OPERATIONS

406 TERMS FOR PERMITS FOR DUST-GENERATING OPERATIONS

407 DEFACING, ALTERING, FORGING, COUNTERFEITING, OR FALSIFYING 

PERMITS FOR DUST-GENERATING OPERATIONS

408 FEES FOR PERMITS FOR DUST-GENERATING OPERATIONS

409 POSTING OF PERMITS FOR DUST-GENERATING OPERATIONS

410 COMPLIANCE SCHEDULE

SECTION 500 – MONITORING AND RECORDS

501 COMPLIANCE DETERMINATION

502 RECORDKEEPING

503 RECORDS RETENTION

504 TEST METHODS ADOPTED BY REFERENCE
310–4

BLANK PAGE
310–5

Revised 07/13/88

Revised 07/06/93

Revised 09/20/94

Revised 06/16/99

Revised 02/16/00

Revised 04/07/04

Revised 03/26/08

Revised 01/27/10

MARICOPA COUNTY

AIR POLLUTION CONTROL REGULATIONS

REGULATION III – CONTROL OF AIR CONTAMINANTS

RULE 310

FUGITIVE DUST FROM DUST-GENERATING OPERATIONS

SECTION 100 – GENERAL

101 PURPOSE: To limit particulate matter (PM10) emissions into the ambient air from any 

property, operation or activity that may serve as a fugitive dust source. The effect of this 

rule shall be to minimize the amount of PM10 entrained into the ambient air as a result of 

the impact of human activities by requiring measures to prevent, reduce, or mitigate 

particulate matter emissions.

102 APPLICABILITY: The provisions of this rule shall apply to all dust-generating

operations except for those dust-generating operations listed in Section 103 of this rule.

103 EXEMPTIONS:

103.1 The provisions of this rule shall not apply to normal farm cultural practices 

according to Arizona Revised Statutes (A.R.S.) § 49-457 and A.R.S. § 49-504.4.

103.2 The provisions of this rule shall not apply to the following non-traditional sources 

of fugitive dust that are located at sources that do not require any permit under 

these rules. These non-traditional sources of fugitive dust are subject to the 

standards and/or requirements described in Rule 310.01: Fugitive Dust from NonTraditional Sources of Fugitive Dust of these rules:

a. Vehicle use in open areas and vacant lots.

b. Open areas and vacant lots.

c. Unpaved parking lots.

d. Unpaved roadways (including alleys).
310–6

e. Livestock activities.

f. Erosion-caused deposition of bulk materials onto paved surfaces.

g. Easements, rights-of-way, and access roads for utilities (transmission of 

electricity, natural gas, oil, water, and gas).

103.3 The provisions of this rule shall not apply to emergency activities that may disturb 

the soil conducted by any utility or government agency in order to prevent public 

injury or to restore critical utilities to functional status.

103.4 The provisions of this rule do not apply to the establishment of initial landscapes 

without the use of mechanized equipment, conducting landscape maintenance 

without the use of mechanized equipment, and playing on or maintaining a field 

used for non-motorized sports. However, establishing initial landscapes without 

the use of mechanized equipment and conducting landscape maintenance without 

the use of mechanized equipment shall not include grading, or trenching 

performed to establish initial landscapes or to redesign existing landscapes.

103.5 The provisions of this rule shall not apply to rooftop operations for cutting, 

drilling, grinding, or coring roofing tile when such activity is occurring on a 

pitched roof.

SECTION 200 – DEFINITIONS: For the purpose of this rule, the following definitions apply, 

in addition to those definitions found in Rule 100: General Provisions and Definitions of these 

rules. In the event of any inconsistency between any of the Maricopa County air pollution control 

rules, the definitions in this rule take precedence.

201 AREA A – As defined in A.R.S. § 49-541(1), the area in Maricopa County delineated as 

follows:

Township 8 North, Range 2 East and Range 3 East

Township 7 North, Range 2 West through Range 5 East

Township 6 North, Range 5 West through Range 6 East

Township 5 North, Range 5 West through Range 7 East

Township 4 North, Range 5 West through Range 8 East

Township 3 North, Range 5 West through Range 8 East

Township 2 North, Range 5 West through Range 8 East

Township 1 North, Range 5 West through Range 7 East

Township 1 South, Range 5 West through Range 7 East

Township 2 South, Range 5 West through Range 7 East

Township 3 South, Range 5 West through Range 1 East

Township 4 South, Range 5 West through Range 1 East
310–7

202 AREA ACCESSIBLE TO THE PUBLIC – Any paved parking lot or paved roadway 

that can be entered or used for public travel primarily for purposes unrelated to the dustgenerating operation.

203 BULK MATERIAL – Any material, including, but not limited to, the following 

materials that are capable of producing fugitive dust:

203.1 Earth.

203.2 Rock.

203.3 Silt.

203.4 Sediment.

203.5 Sand.

203.6 Gravel.

203.7 Soil.

203.8 Fill.

203.9 Aggregate less than 2 inches in length or diameter (i.e., aggregate base course 

[ABC]).

203.10 Dirt.

203.11 Mud.

203.12 Demolition debris.

203.13 Cotton.

203.14 Trash.

203.15 Cinders.

203.16 Pumice.

203.17 Sawdust.

203.18 Feeds.

203.19 Grains.

203.20 Fertilizers.

203.21 Fluff from shredders.

203.22 Dry concrete.

204 BULK MATERIAL HANDLING, STORAGE, AND/OR TRANSPORTING 

OPERATION – The use of equipment, haul trucks, and/or motor vehicles, including, but 

not limited to, for the following activities that are capable of producing fugitive dust:

204.1 Loading.

204.2 Unloading.

204.3 Conveying.

204.4 Transporting.

204.5 Piling.

204.6 Stacking.

204.7 Screening.

204.8 Grading.

204.9 Moving bulk materials.
310–8

205 CONTROL MEASURE – A technique, practice, or procedure used to prevent or 

minimize the generation, emission, entrainment, suspension, and/or airborne transport of 

fugitive dust. Control measures include, but are not limited to:

205.1 Curbing;

205.2 Paving;

205.3 Pre-watering;

205.4 Applying dust suppressants;

205.5 Physically stabilizing with vegetation, gravel, recrushed/recycled asphalt or 

other forms of physical stabilization;

205.6 Limiting, restricting, phasing and/or rerouting motor vehicle access;

205.7 Reducing vehicle speeds and/or number of vehicle trips;

205.8 Limiting use of off-road vehicles on open areas and vacant lots;

205.9 Utilizing work practices and/or structural provisions to prevent wind and 

water erosion onto areas accessible to the public;

205.10 Appropriately using dust control implements;

205.11 Installing one or more grizzlies, gravel pads, and/or wash down pads adjacent 

to the entrance of an area accessible to the public to control carry-out and 

trackout;

205.12 Keeping open-bodied haul trucks in good repair, so that spillage may not 

occur from beds, sidewalls, and tailgates; and

205.13 Covering the cargo beds of haul trucks to minimize wind-blown dust 

emissions and spillage.

206 DISTURBED SURFACE AREA – A portion of the earth's surface or material placed on 

the earth’s surface that has been physically moved, uncovered, destabilized, or otherwise 

modified from its undisturbed native condition if the potential for the emission of fugitive 

dust is increased by the movement, destabilization, or modification.

207 DUST CONTROL IMPLEMENT – A tool, machine, equipment, accessory, structure, 

enclosure, cover, material or supply, including an adequate readily available supply of 

water and its associated distribution/delivery system, used to control fugitive dust 

emissions.

208 DUST CONTROL PLAN – A written plan describing all control measures to be 

implemented and maintained in order to prevent or minimize the generation, emission, 

entrainment, suspension, and/or airborne transport of fugitive dust.

209 DUST-GENERATING OPERATION – Any activity capable of generating fugitive 

dust, including, but not limited to, the following activities:

209.1 Land clearing, maintenance, and land clean-up using mechanized equipment.

209.2 Earthmoving.

209.3 Weed abatement by discing or blading.

209.4 Excavating.

209.5 Construction.
310–9

209.6 Demolition.

209.7 Bulk material handling (e.g., bulk material hauling and/or transporting, bulk 

material stacking, loading, and unloading operations).

209.8 Storage and/or transporting operations (e.g., open storage piles).

209.9 Operation of any outdoor equipment.

209.10 Operation of motorized machinery.

209.11 Establishing and/or using staging areas, parking areas, material storage areas, or 

access routes to and from a site.

209.12 Establishing and/or using unpaved haul/access roads to, from, and within a site.

209.13 Disturbed surface areas associated with a site.

209.14 Installing initial landscapes using mechanized equipment.

210 DUST SUPPRESSANT – Water, hygroscopic material, solution of water and chemical 

surfactant, foam, non-toxic chemical stabilizer or any other dust palliative, which is not 

prohibited for ground surface application by the U.S. Environmental Protection Agency 

(EPA) or the Arizona Department of Environmental Quality (ADEQ) or any applicable 

law, rule, or regulation, as a treatment material for reducing fugitive dust emissions.

211 EARTHMOVING OPERATION – The use of any equipment for an activity that may 

generate fugitive dust, such as but not limited to, the following activities:

211.1 Cutting and filling.

211.2 Grading.

211.3 Leveling.

211.4 Excavating.

211.5 Trenching.

211.6 Loading or unloading of bulk materials.

211.7 Demolishing.

211.8 Blasting.

211.9 Drilling.

211.10 Adding bulk materials to or removing bulk materials from open storage piles.

211.11 Back filling.

211.12 Soil mulching.

211.13 Landfill operations.

211.14 Weed abatement by discing or blading.

212 EMERGENCY – A situation arising from sudden and reasonably unforeseeable events 

beyond the control of the source, including acts of God, which situation requires 

immediate corrective action to restore normal operation, and that causes the source to 

exceed a limitation in this rule, due to unavoidable increases in emissions attributable to 

the emergency. An emergency shall not include any noncompliance due to improperly 

designed equipment, lack of preventative maintenance, careless or improper operation, or 

operator error.

213 EMERGENCY ACTIVITY – Repairs that are a result of an emergency which prevents 

or hinders the provision of electricity, the distribution/collection of water, and the 
310–10

availability of other utilities due to unforeseen circumstances that are beyond the routine 

maintenance and repair due to normal wear conducted by a utility or municipality.

214 END OF WORKDAY – The end of a working period that may include one or more 

work shifts. If working 24 hours a day, the end of a working period shall be considered 

no later than 8 pm.

215 FREEBOARD – The vertical distance between the top edge of a cargo container area 

and the highest point at which the bulk material contacts the sides, front, and back of a 

cargo container area.

216 FUGITIVE DUST – The particulate matter not collected by a capture system, that is 

entrained in the ambient air, and is caused from human and/or natural activities, such as, 

but not limited to, the movement of soil, vehicles, equipment, blasting, and wind. For the 

purpose of this rule, fugitive dust does not include particulate matter emitted directly 

from the exhaust of motor vehicles and other internal combustion engines, from portable 

brazing, soldering, or welding equipment, and from piledrivers, and does not include 

emissions from process and combustion sources that are subject to other rules in 

Regulation III (Control of Air Contaminants) of these rules.

217 GRAVEL PAD – A layer of washed gravel, rock, or crushed rock that is at least one 

inch or larger in diameter, that is maintained at the point of intersection of an area 

accessible to the public and a work site exit to dislodge mud, dirt, and/or debris from the 

tires of motor vehicles and/or haul trucks, prior to leaving the work site. Minimum 

dimensions must be 30 feet wide by 3 inches deep and 50 feet long, or the length of the 

longest haul truck, whichever is greater. If an unpaved surface exit does not have 

adequate width to install a 30-foot wide gravel pad, then the width of the gravel pad must 

cover the full width of the unpaved surface exit and such shorter width must be adequate 

to prevent trackout.

218 GRIZZLY – A device (i.e., rails, pipes, or grates) used to dislodge mud, dirt, and/or 

debris from the tires and undercarriage of motor vehicles and/or haul trucks prior to 

leaving the work site.

219 HAUL TRUCK – Any fully or partially open-bodied self-propelled vehicle including 

any non-motorized attachments, such as, but not limited to, trailers or other conveyances 

that are connected to or propelled by the actual motorized portion of the vehicle used for 

transporting bulk materials.

220 MOTOR VEHICLE – A self-propelled vehicle for use on the public roads and 

highways of the State of Arizona and required to be registered under the Arizona State 

Uniform Motor Vehicle Act, including any non-motorized attachments, such as but not 

limited to, trailers or other conveyances which are connected to or propelled by the actual 

motorized portion of the vehicle.
310–11

221 NORMAL FARM CULTURAL PRACTICE – All activities by the owner, lessee, 

agent, independent contractor, and/or supplier conducted on any facility for the 

production of crops and/or nursery plants. Disturbances of the field surface caused by 

turning under stalks, tilling, leveling, planting, fertilizing, or harvesting are included in 

this definition.

222 OFF-ROAD VEHICLE – Any self-propelled conveyance specifically designed for offroad use, including, but not limited to, off-road or all-terrain equipment, trucks, cars, 

motorcycles, motorbikes, or motorbuggies.

223 OPEN STORAGE PILE – Any accumulation of bulk material with a 5% or greater silt 

content that has a total surface area of 150 square feet or more and that at any one point 

attains a height of three feet. Silt content shall be assumed to be 5% or greater unless a 

person can show, by testing in accordance with ASTM Method C136-06 or other 

equivalent method approved in writing by the Control Officer and the Administrator, that 

the silt content is less than 5%.

224 OWNER AND/OR OPERATOR – The person including, but not limited to, the 

property owner, lessee, developer, responsible official, Dust Control permit applicant 

(who may also be the responsible party contracting to do the work), general contractor, 

prime contractor, supervisor, management company, or any person who owns, leases, 

operates, controls, or supervises a dust-generating operation subject to the requirements 

of this rule.

225 PAVE – To apply and maintain asphalt, concrete, or other similar material to a roadway 

surface (i.e., asphaltic concrete, concrete pavement, chip seal, or rubberized asphalt).

226 PROPERTY LINE – The boundaries of an area in which either a person causing the 

emission or a person allowing the emission has the legal use or possession of the 

property. Where such property is divided into one or more sub-tenancies, the property 

line(s) shall refer to the boundaries dividing the areas of all sub-tenancies.

227 ROUTINE – Any dust-generating operation which occurs more than 4 times per year or 

lasts 30 cumulative days or more per year.

228 SILT – Any aggregate material with a particle size less than 75 micrometers in diameter, 

which passes through a No. 200 sieve.

229 TRACKOUT/CARRYOUT – Any and all bulk materials that adhere to and 

agglomerate on the surfaces of motor vehicles, haul trucks, and/or equipment (including 

tires) and that have fallen or been deposited onto an area accessible to the public.

230 TRACKOUT CONTROL DEVICE – A gravel pad, grizzly, wheel wash system, or a 

paved area, located at the point of intersection of an unpaved area and an area accessible 

to the public that controls or prevents vehicular trackout.
310–12

231 UNPAVED HAUL/ACCESS ROAD – Any on-site unpaved road used by commercial, 

industrial, institutional, and/or governmental traffic.

232 UNPAVED PARKING LOT – Any area that is not paved and that is designated for 

parking in the Dust Control Plan or that is used for parking, maneuvering, material 

handling, or storing motor vehicles and equipment. An unpaved parking lot includes, but 

is not limited to, automobile impound yards, wrecking yards, automobile dismantling 

yards, salvage yards, material handling yards, and storage yards. For the purpose of this

rule, maneuvering shall not include military maneuvers or exercises conducted on federal 

facilities.

233 UNPAVED ROAD – Any road or equipment path that is not paved. For the purpose of 

this rule, an unpaved road is not a horse trail, hiking path, bicycle path, or other similar 

path used exclusively for purposes other than travel by motor vehicles.

234 WIND-BLOWN DUST – Visible emissions, from any disturbed surface area, that are 

generated by wind action alone.

235 WORK SITE – Any property upon which any dust-generating operations occur.

SECTION 300 – STANDARDS

301 GENERAL REQUIREMENTS FOR DUST-GENERATING OPERATIONS:

301.1 Any person engaged in a dust-generating operation subject to this rule shall be 

subject to the standards and/or requirements of this rule before, after, and while 

conducting such dust-generating operation, including during weekends, after work 

hours, and on holidays.

301.2 For the purpose of this rule, any control measure that is implemented must achieve 

the applicable standard(s) described in this rule, as determined by the corresponding 

test method(s), as applicable, and must achieve other applicable standard(s) set forth 

in this rule.

301.3 Control measures described in Section 305 of this rule. Regardless of whether a 

dust-generating operation is in compliance with an approved Dust Control Plan or 

there is no approved Dust Control Plan, the owner and/or operator of a dustgenerating operation shall be subject to all requirements of this rule at all times.

301.4 Failure to comply with the provisions of this rule, as applicable, and/or of an 

approved Dust Control Plan, shall constitute a violation.

302 PERMIT REQUIREMENTS FOR DUST-GENERATING OPERATIONS:

302.1 No person shall commence construction of, operate, or make a modification to 

any dust-generating operation when such dust-generating operations disturb a 
310–13

total surface area of 0.10 acre (4,356 square feet) or more without first obtaining a 

permit or permit revision from the Control Officer.

302.2 No person shall commence construction of, operate, or make a modification to 

any dust-generating operation that disturbs a total surface area of less than 0.10 

acre (4,356 square feet) under common control that are either contiguous or 

separated only by a public or private roadway and that cumulatively equal or 

exceed 0.10 acre in area without first obtaining a permit or permit revision from 

the Control Officer.

302.3 No person shall commence any routine dust-generating operation that disturbs a 

surface area of 0.10 acre or greater at a site that has obtained or must obtain a 

Title V, Non-Title V, or General permit under Regulation II (Permits and Fees) of 

these rules without first submitting to the Control Officer a Dust Control Plan.

302.4 The property owner, lessee, developer, responsible official, Dust Control permit 

applicant (who may also be the responsible party contracting to do the work), 

general contractor, prime contractor, supervisor, management company, or any 

person who owns, leases, operates, controls, or supervises a dust-generating

operation subject to the requirements of this rule shall be responsible for obtaining 

a permit or permit revision from the Control Officer.

302.5 All permit applications shall be filed in the manner and form prescribed by the 

Control Officer, which includes, but is not limited to, the requirements of Section 

400 of this rule. The application shall contain all the information necessary to 

enable the Control Officer to make the determination to grant or to deny a permit 

or permit revision, which shall contain such terms and conditions as the Control 

Officer deems necessary to assure a source's compliance with the requirements of 

this rule.

302.6 The issuance of any permit or permit revision shall not relieve any person subject 

to the requirements of this rule from compliance with any Federal laws, Arizona 

laws, or these rules.

302.7 Any other law, regulation or permit shall not relieve any person from obtaining a 

permit or permit revision required under this rule.

303 VISIBLE EMISSIONS REQUIREMENTS FOR DUST-GENERATING

OPERATIONS:

303.1 Dust-Generating Operation Visible Emissions Requirement: The owner 

and/or operator of a dust-generating operation shall not allow visible fugitive dust 

emissions to exceed the limits listed in either one of the following:

a. The owner and/or operator of a dust-generating operation shall not cause or 

allow visible fugitive dust emissions to exceed 20% opacity.
310–14

b. The owner and/or operator of a dust-generating operation shall not cause or 

allow visible emissions of particulate matter, including fugitive dust, beyond 

the property line within which the emissions are generated. Visible emissions 

shall be determined by a standard of no visible emissions exceeding 30 

seconds in duration in any six-minute period as determined by using EPA

Reference Method 22.

303.2 Exemptions from Dust-Generating Operation Visible Emissions

Requirement:

a. If wind conditions cause fugitive dust emissions to exceed the visible 

emissions requirements in Section 303.1(a) of this rule, despite implementation of the Dust Control Plan, an owner and/or operator shall:

(1) Ensure that all control measures and requirements of the Dust Control 

Plan are implemented and the subject violations cannot be prevented by 

better application, operation, or maintenance of these measures and 

requirements.

(2) Cease dust-generating operations and stabilize any disturbed surface area 

consistent with Section 304.3 of this rule.

(3) Compile records consistent with Sections 502 and 503 of this rule and 

document control measure and other Dust Control Plan requirement 

implementation.

b. Emergency Maintenance of Flood Control Channels and Water Retention 

Basins: The visible emissions limits described in Section 303.1 of this rule 

shall not apply to emergency maintenance of flood control channels and water 

retention basins, provided that control measures are implemented.

c. Vehicle Test and Development Facilities and Operations: The visible 

emissions limit described in Section 303.1(a) of this rule shall not apply to 

vehicle test and development facilities and operations when dust is required to 

test and validate design integrity, product quality, and/or commercial 

acceptance, if such testing is not feasible within enclosed facilities. However, 

all areas used to test and validate design integrity, product quality, and/or 

commercial acceptance shall be stabilized after such testing, in compliance 

with Appendix C (Fugitive Dust Test Methods) of these rules. All areas not 

used to test and validate design integrity, product quality, and/or commercial 

acceptance shall be stabilized, in compliance with Appendix C (Fugitive Dust 

Test Methods) of these rules. In addition, vehicle test and development 

facilities may require a Dust Control permit in accordance with Section 302 of 

this rule.
310–15

d. Activities Near the Property Line: The opacity limit described in Section 

303.1(b) of this rule shall not apply to dust-generating operations conducted 

within 25 feet of the property line.

e. Ceasing Operations at a Solid Waste Management Facility: The requirement in Section 303.2(a)(2) of this rule to cease dust-generating operations if 

wind conditions cause fugitive dust emissions to exceed the visible emissions 

requirements in Section 303.1(a) of this rule shall not apply to daily compaction and covering of refuse if ceasing operations violates Arizona Department 

of Environmental Quality solid waste management rules or causes or threatens 

to cause a public health hazard or nuisance. However, the owner and/or 

operator must comply with all other provisions in Section 303.2(a) of this rule.

304 STABILIZATION REQUIREMENTS FOR DUST-GENERATING

OPERATIONS:

304.1 Unpaved Parking Lot: The owner and/or operator of any unpaved parking lot 

shall not allow visible fugitive dust emissions to exceed 20% opacity and shall not 

allow silt loading equal to or greater than 0.33 oz/ft2

. However, if silt loading is 

equal to or greater than 0.33 oz/ft2, then the owner and/or operator shall not allow 

the silt content to exceed 8%.

304.2 Unpaved Haul/Access Road:

a. The owner and/or operator of any unpaved haul/access road (whether at a 

work site that is under construction or at a work site that is temporarily or 

permanently inactive) shall not allow visible fugitive dust emissions to exceed 

20% opacity and shall not allow silt loading equal to or greater than 0.33 

oz/ft2. However, if silt loading is equal to or greater than 0.33 oz/ft2

, then the 

owner and/or operator shall not allow the silt content to exceed 6%.

b. The owner and/or operator of any unpaved haul/access road (whether at a 

work site that is under construction or a work site that is temporarily or 

permanently inactive) shall, as an alternative to meeting the stabilization 

requirements for an unpaved haul/access road in Section 304.2(a) of this rule, 

limit vehicle trips to no more than 20 per day per road and limit vehicle 

speeds to no more than 15 miles per hour. If complying with this section of 

this rule, the owner and/or operator must include, in a Dust Control Plan, the 

maximum number of vehicle trips on the unpaved haul/access roads each day 

(including number of employee vehicles, earthmoving equipment, haul trucks, 

and water trucks) and a description of how vehicle speeds will be restricted to 

no more than 15 miles per hour.

304.3 Disturbed Surface Area: The owner and/or operator of any disturbed surface 

area on which no activity is occurring (whether at a work site that is under 

construction or a work site that is temporarily or permanently inactive) shall meet 
310–16

at least one of the standards described in Sections 304.3(a) through 304.3(g) 

below, as applicable. Should such a disturbed surface area contain more than one 

type of stabilization characteristic, such as soil, vegetation, or other characteristic, 

which is visibly distinguishable, then the owner and/or operator shall test each 

representative surface separately for stability, in an area that represents a random 

portion of the overall disturbed conditions of the site, in accordance with the 

appropriate test methods described in Section 501.2(c) of this rule and in 

Appendix C (Fugitive Dust Test Methods) of these rules. The owner and/or 

operator of such disturbed surface area on which no activity is occurring shall be 

considered in violation of this rule if the area is not maintained in a manner that 

meets at least one of the standards listed below, as applicable. An area is considered to be a disturbed surface area until the activity that caused the disturbance 

has been completed and the disturbed surface area meets the standards described 

in this section of this rule.

a. Maintain a soil crust;

b. Maintain a threshold friction velocity (TFV) for disturbed surface areas 

corrected for non-erodible elements of 100 cm/second or higher;

c. Maintain a flat vegetative cover (i.e., attached [rooted] vegetation or 

unattached vegetative debris lying on the surface with a predominant 

horizontal orientation that is not subject to movement by wind) that is equal to 

at least 50%;

d. Maintain a standing vegetative cover (i.e., vegetation that is attached [rooted]

with a predominant vertical orientation) that is equal to or greater than 30%;

e. Maintain a standing vegetative cover (i.e., vegetation that is attached [rooted]

with a predominant vertical orientation) that is equal to or greater than 10% 

and where the threshold friction velocity is equal to or greater than 43 

cm/second when corrected for non-erodible elements;

f. Maintain a percent cover that is equal to or greater than 10% for non-erodible 

elements; or

g. Comply with a standard of an alternative test method, upon obtaining the 

written approval from the Control Officer and the Administrator.

304.4 Vehicle Test and Development Facilities and Operations: No stabilization 

requirement shall apply to vehicle test and development facilities and operations 

when dust is required to test and validate design integrity, product quality, and/or 

commercial acceptance, if such testing is not feasible within enclosed facilities. 

However, all areas used to test and validate design integrity, product quality, 

and/or commercial acceptance shall be stabilized after such testing, in compliance 

with Appendix C (Fugitive Dust Test Methods) of these rules. All areas not used 
310–17

to test and validate design integrity, product quality, and/or commercial 

acceptance shall be stabilized, in compliance with Appendix C (Fugitive Dust 

Test Methods) of these rules. In addition, vehicle test and development facilities 

may require a Dust Control permit in accordance with Section 302 of this rule.

305 CONTROL MEASURES FOR DUST-GENERATING OPERATIONS: When 

engaged in a dust-generating operation, the owner and/or operator shall install, maintain, 

and use control measures, as applicable. Control measures for specific dust-generating 

operations are described in Sections 305.1 through 305.12 of this rule. The owner and/or 

operator of a dust-generating operation shall implement control measures before, after, 

and while conducting dust-generating operations, including during weekends, after work 

hours, and on holidays. At least one primary control measure and one contingency 

control measure must be identified in the Dust Control Plan for all dust-generating

sources.

305.1 Off-Site Hauling onto Areas Accessible to the Public: The owner and/or 

operator of a dust-generating operation that involves off-site hauling shall

implement the following control measures:

a. When cargo compartment is loaded:

(1) Load all haul trucks such that the freeboard is not less than three inches;

(2) Load all haul trucks such that at no time shall the highest point of the bulk 

material be higher than the sides, front, and back of a cargo container area;

(3) Prevent spillage or loss of bulk material from holes or other openings in 

the cargo compartment’s floor, sides, and/or tailgate(s); and

(4) Cover the cargo compartment with a tarp or other suitable closure.

b. When cargo compartment is empty:

(1) Clean the interior of the cargo compartment; or

(2) Cover the cargo compartment with a tarp or other suitable closure.

c. When off-site hauling, install, maintain, and use a suitable trackout control 

device that controls and prevents trackout and/or removes particulate matter 

from tires and the exterior surfaces of haul trucks and/or motor vehicles that 

traverse the site.

305.2 Bulk Material Hauling/Transporting When On-Site Hauling/Transporting 

Within the Boundaries of the Work Site but not Crossing an Area Accessible 

to the Public: The owner and/or operator of a dust-generating operation that 

involves bulk material hauling/transporting when on-site hauling/transporting 
310–18

within the boundaries of the work site but not crossing an area accessible to the 

public shall implement one of the following control measures:

a. Limit vehicle speed to 15 miles per hour or less while traveling on the work 

site;

b. Apply water to the top of the load; or

c. Cover haul trucks with a tarp or other suitable closure.

305.3 Bulk Material Hauling/Transporting When On-Site Hauling/Transporting 

Within the Boundaries of the Work Site and Crossing and/or Accessing an 

Area Accessible to the Public: The owner and/or operator of a dust-generating

operation that involves bulk material hauling/transporting when on-site hauling/

transporting within the boundaries of the work site and crossing and/or accessing

an area accessible to the public shall implement all of the following control 

measures:

a. Load all haul trucks such that the freeboard is not less than three inches;

b. Load all haul trucks such that at no time shall the highest point of the bulk 

material be higher than the sides, front, and back of a cargo container area;

c. Prevent spillage or loss of bulk material from holes or other openings in the 

cargo compartment’s floor, sides, and/or tailgate(s); and

d. When crossing and/or accessing an area accessible to the public, install, 

maintain, and use a suitable trackout control device that controls and prevents 

trackout and/or removes particulate matter from tires and the exterior surfaces 

of haul trucks and/or motor vehicles that traverse the site.

305.4 Bulk Material Stacking, Loading, and Unloading Operations: The owner 

and/or operator of a dust-generating operation that involves bulk material 

stacking, loading, and unloading operations shall implement the following control 

measures:

a. Prior to stacking, loading, and unloading:

(1) Mix material with water; or

(2) Mix material with a dust suppressant other than water.

b. While stacking, loading, and unloading:

(1) Apply water; or
310–19

(2) Apply a dust suppressant other than water.

305.5 Open Storage Piles: The owner and/or operator of a dust-generating operation 

that involves an open storage pile shall implement one of the following control 

measures, as applicable, when not conducting stacking, loading, and unloading 

operations:

a. Cover all open storage piles with a tarp, plastic, or other material to prevent 

wind from removing the covering(s) such that the covering(s) will not be 

dislodged by wind; or

b. Apply water to maintain a soil moisture content at a minimum of 12%, as 

determined by ASTM Method D2216-05 or other equivalent methods 

approved by the Control Officer and the Administrator. For areas that have an 

optimum moisture content for compaction of less than 12%, as determined by 

ASTM Method D1557-02e1 or other equivalent methods approved by the 

Control Officer and the Administrator, maintain at least 70% of the optimum 

soil moisture content; or

c. Maintain a visible crust; or

d. Implement the control measure described in Section 305.5(b) or in Section 

305.5(c) of this rule and construct and maintain wind barriers, storage silos, or 

a three-sided enclosure with walls, whose length is no less than equal to the 

length of the pile, whose distance from the pile is no more than twice the 

height of the pile, whose height is equal to the pile height, and whose porosity 

is no more than 50%.

305.6 Unpaved Staging Areas, Unpaved Parking Areas, and Unpaved Material 

Storage Areas: The owner and/or operator of a dust-generating operation that 

involves unpaved staging areas, unpaved parking areas, and unpaved material 

storage areas shall implement one or more of the following control measures:

a. Apply water so that the surface is visibly moist;

b. Pave;

c. Apply and maintain gravel, recycled asphalt, or other suitable material;

d. Apply and maintain a suitable dust suppressant other than water; or

e. Limit vehicle trips to no more than 20 per day per road and limit vehicle 

speeds to no more than 15 miles per hour. If complying with this section, the 

owner and/or operator shall provide to the Control Officer the maximum 

number of vehicle trips on the staging areas, parking areas, and/or material 

storage areas each day (including number of employee vehicles, earthmoving 
310–20

equipment, haul trucks, and water trucks) and a description of how vehicle 

speeds will be restricted to no more than 15 miles per hour.

305.7 Unpaved Haul/Access Roads: The owner and/or operator of a dust-generating

operation that involves unpaved haul/access roads shall implement one or more of 

the following control measures:

a. Apply water so that the surface is visibly moist;

b. Pave;

c. Apply and maintain gravel, recycled asphalt, or other suitable material;

d. Apply and maintain a suitable dust suppressant other than water; or

e. Limit vehicle trips to no more than 20 per day per road and limit vehicle 

speeds to no more than 15 miles per hour. If complying with this section of 

this rule, the owner and/or operator shall provide to the Control Officer the 

maximum number of vehicle trips on the unpaved haul/access roads each day 

(including number of employee vehicles, earthmoving equipment, haul trucks, 

and water trucks) and a description of how vehicle speeds will be restricted to 

no more than 15 miles per hour.

305.8 Weed Abatement by Discing or Blading: The owner and/or operator of a dustgenerating operation that involves weed abatement by discing or blading shall

comply with all of the following control measures:

a. Before weed abatement by discing or blading occurs, apply water;

b. While weed abatement by discing or blading is occurring, apply water; and

c. After weed abatement by discing or blading occurs, pave, apply gravel, apply 

water, apply a suitable dust suppressant other than water, or establish 

vegetative ground cover.

305.9 Blasting Operations: The owner and/or operator of a dust-generating operation 

that involves blasting operations shall pre-water and maintain surface soils in a 

stabilized condition where support equipment and vehicles will operate.

305.10 Demolition Activities: The owner and/or operator of a dust-generating operation 

that involves demolition activities shall implement all of the following control 

measures:

a. Apply water to demolition debris immediately following demolition activity; 

and
310–21

b. Apply water to all disturbed soils surfaces to establish a visible crust and to 

prevent wind erosion.

305.11 Disturbed Surface Areas: The owner and/or operator of a dust-generating

operation that involves disturbed surface areas shall implement the following 

control measures, as applicable:

a. Before disturbed surface areas are created, implement one of the following 

control measures:

(1) Pre-water site to depth of cuts, allowing time for penetration; or

(2) Phase work to reduce the amount of disturbed surface areas at any one 

time.

b. While disturbed surface areas are being created, implement one of the 

following control measures:

(1) Apply water or other suitable dust suppressant other than water to keep the 

soil visibly moist throughout the process;

(2) Apply water to maintain a soil moisture content at a minimum of 12%, as 

determined by ASTM Method D2216-05 or other equivalent method as 

approved by the Control Officer and the Administrator. For areas that have 

an optimum moisture content for compaction of less than 12%, as 

determined by ASTM Method D1557-02e1 or other equivalent method 

approved by the Control Officer and the Administrator, maintain at least 

70% of the optimum soil moisture content; or

(3) Implement control measure described in Section 305.11(b)(1) or Section 

305.11(b)(2) of this rule and construct fences or three-foot to five-foot 

high wind barriers with 50% or less porosity adjacent to roadways or 

urban areas to reduce the amount of wind-blown material leaving a site.

c. When the dust-generating operation is finished for a period of 30 days or 

longer: For longer than temporary pauses that occur during a dust-generating

operation, the owner and/or operator shall implement one or more of the 

following control measures within ten days following the completion of such 

dust-generating operation:

(1) Pave, apply gravel, or apply a suitable dust suppressant other than water;

(2) Establish vegetative ground cover;

(3) Implement control measures described in Section 305.11(c)(1) or Section 

305.11(c)(2) of this rule and restrict vehicle access to the area;
310–22

(4) Apply water and prevent access by fences, ditches, vegetation, berms, or 

other suitable barrier or means sufficient to prevent trespass as approved 

by the Control Officer; or

(5) Restore area such that the vegetative ground cover and soil characteristics 

are similar to adjacent or nearby undisturbed native conditions.

305.12 Easements, Rights-of-Way, and Access Roads for Utilities (Transmission of

Electricity, Natural Gas, Oil, Water, and Gas) Associated With Sources That 

Have a Non-Title V Permit, a Title V Permit, and/or a General Permit Under 

These Rules: The owner and/or operator of a dust-generating operation that 

involves an easement, right-of-way, and access road for utilities (transmission of 

electricity, natural gas, oil, water, and gas) associated with sources that have a 

Title V permit, a Non-Title V permit, and/or a General permit under these rules 

shall implement at least one of the following control measures:

a. Inside Area A, limit vehicle speed to 15 miles per hour or less and vehicle 

trips to no more than 20 per day per road;

b. Outside Area A, limit vehicle trips to no more than 20 per day per road; or

c. Implement control measures described in Section 305.7 of this rule.

306 TRACKOUT, CARRY-OUT, SPILLAGE, AND/OR EROSION: The owner and/or 

operator of a dust-generating operation shall prevent and control trackout, carry-out, 

spillage, and/or erosion.

306.1 Trackout Control Device:

a. Criterion for Trackout Control Device: Install, maintain and use a suitable 

trackout control device that prevents and controls trackout and/or removes 

particulate matter from tires and the exterior surfaces of haul trucks and/or 

motor vehicles that traverse the site at all exits onto areas accessible to the 

public from both of the following:

(1) All work sites with a disturbed surface area of two acres or larger, and

(2) All work sites where 100 cubic yards of bulk materials are hauled on-site 

and/or off-site per day.

b. Control Measures: For those work sites identified in Section 306.1(a) of this 

rule, prevent trackout, carry-out, spillage, and/or erosion by implementing one 

of the following control measures:
310–23

(1) At all exits onto areas accessible to the public, install a wheel wash 

system;

(2) At all exits onto areas accessible to the public, install a gravel pad to 

comply with Section 217 of this rule;

(3) At all exits onto areas accessible to the public, install a grizzly or rumble 

grate that consists of raised dividers (rails, pipes, or grates) a minimum of 

three inches tall, six inches apart, and 20 feet long, to allow a vibration to 

be produced such that dust is shaken off the wheels of a vehicle as the 

entire circumference of each wheel of the vehicle passes over the grizzly 

or rumble grate; or

(4) Pave starting from the point of intersection with an area accessible to the 

public and extending for a centerline distance of at least 100 feet and a 

width of at least 20 feet.

306.2 Clean Up of Trackout:

a. Criterion for Clean Up of Trackout: Clean up, trackout, carry-out, spillage, 

and/or erosion from areas accessible to the public including curbs, gutters, and 

sidewalks, on the following time-schedule:

(1) Immediately, when trackout, carry-out, or spillage extends a cumulative 

distance of 25 linear feet or more; and

(2) At the end of the workday, for all other trackout, carry-out, spillage, 

and/or erosion.

b. Control Measures:

(1) Operate a street sweeper or wet broom with sufficient water, or including 

but not limited to kick broom, steel bristle broom, Teflon broom, vacuum, 

at the speed recommended by the manufacturer and at the frequency(ies) 

described in this section of this rule; or

(2) Manually sweep up deposits to comply with this section of this rule.

307 SOIL MOISTURE: If water is the chosen control measure in an approved Dust Control 

Plan, the owner and/or operator of a dust-generating operation shall operate a water 

application system on-site (e.g., water truck, water hose) while conducting any earthmoving operations on disturbed surface areas 1 acre or larger, unless a visible crust is 

maintained or the soil is sufficiently damp to prevent loose grains of soil from becoming 

dislodged.
310–24

308 PROJECT INFORMATION SIGN FOR DUST-GENERATING OPERATIONS: 

For all sites with a Dust Control permit that are five acres or larger, except for routine 

maintenance and repair done under a Dust Control Block permit, the owner and/or 

operator shall erect and maintain a project information sign at the main entrance such that 

members of the public can easily view and read the sign at all times. Such sign shall have 

a white background, have black block lettering that is at least four inches high, and shall 

contain at least all of the following information:

308.1 Project name and permittee’s name;

308.2 Current Dust Control permit number;

308.3 Name and local phone number of person(s) responsible for dust control matters;

308.4 Text stating: “Dust complaints? Call Maricopa County Air Quality Department –

(Insert the accurate Maricopa County Air Quality Department complaint line 

telephone number).”

309 DUST CONTROL TRAINING CLASSES FOR DUST-GENERATING

OPERATIONS:

309.1 Basic Dust Control Training Class:

a. At least once every three years, the persons specified in Section 309.1(b) or 

Section 309.1(c) of this rule shall successfully complete a Basic Dust Control 

Training Class conducted or approved by the Control Officer.

b. The following persons present at a site that is subject to a permit issued by the 

Control Officer requiring control of PM10 emissions from dust-generating 

operations shall complete a Basic Dust Control Training Class as specified in 

Section 309.1(a) of this rule:

(1) Water truck drivers.

(2) Water-pull drivers.

(3) The site superintendent or other designated on-site representative of the 

permit holder, if present at a site that has more than one acre of disturbed 

surface area.

c. A Dust Control Block Permit permittee/holder shall have, at a minimum, one 

individual trained in accordance with the Basic Dust Control Training Class as 

specified in Section 309.1(a) of this rule, if present at a site that has more than 

one acre of disturbed surface area.
310–25

d. All persons having successfully completed training during the 2006 and 2007 

calendar years shall be deemed to have satisfied the requirement to successfully complete the Basic Dust Control Training Class, if the training that was 

completed was conducted or approved by the Control Officer. Completion of 

the Comprehensive Dust Control Training Class, as required in Section 309.2 

of this rule, shall satisfy the requirement of this section of this rule.

e. The Control Officer may suspend or revoke for cause including, but not 

limited to, inappropriate ethical activities or conduct associated with the dust

control program or repeated failure to follow the training requirements, a 

certification issued to a person having successfully completed a Basic Dust 

Control Training Class conducted or approved by the Control Officer. The 

Control Officer will provide written notification to such person regarding such 

suspension or revocation.

309.2 Comprehensive Dust Control Training Class:

a. At least once every three years, the Dust Control Coordinator, who meets the 

requirements of Section 310 of this rule, shall successfully complete the 

Comprehensive Dust Control Training Class conducted or approved by the 

Control Officer.

b. All persons having successfully completed training during the 2006 and 2007 

calendar years shall be deemed to have satisfied the requirement to successfully complete the Comprehensive Dust Control Training Class, if the training 

that was completed was conducted or approved by the Control Officer.

c. The Control Officer may suspend or revoke for cause including, but not 

limited to, inappropriate ethical activities or conduct associated with the dust 

control program or repeated failure to follow the training requirements, a 

certification issued to a person having successfully completed a Comprehensive Dust Control Training Class conducted or approved by the Control 

Officer. The Control Officer will provide written notification to such person 

regarding such suspension or revocation.

310 DUST CONTROL COORDINATOR FOR DUST-GENERATING OPERATIONS:

310.1 The permittee for any site of five acres or more of disturbed surface area subject 

to a permit issued by the Control Officer requiring control of PM10 emissions 

from dust-generating operations shall have on-site at least one Dust Control 

Coordinator trained in accordance with Section 309.2 of this rule at all times 

during primary dust-generating operations related to the purposes for which the 

Dust Control permit was obtained.

310.2 The Dust Control Coordinator shall have full authority to ensure that dust control 

measures are implemented on-site, including conducting inspections, deployment 
310–26

of dust suppression resources, and modifications or shut-down of activities as 

needed to control dust.

310.3 The Dust Control Coordinator shall be responsible for managing dust prevention 

and dust control on the site.

310.4 At least once every three years, the Dust Control Coordinator shall successfully 

complete a Comprehensive Dust Control Training Class conducted or approved 

by the Control Officer.

310.5 The Dust Control Coordinator shall have a valid dust training certification 

identification card readily accessible on-site while acting as a Dust Control 

Coordinator.

310.6 The requirement for a Dust Control Coordinator shall lapse when all of the 

following actions/events/procedures occur:

a. The area of disturbed surface area becomes less than five acres;

b. The previously disturbed surface areas have been stabilized in accordance 

with/in compliance with the standards and/or requirements of this rule; and

c. The Dust Control permit holder provides notice to the Control Officer of 

acreage stabilization.

310.7 The Dust Control Block Permit permittee/holder shall have on sites that have 

more than one acre of disturbed surface area at least one individual, who has been 

trained in accordance with the requirements of Section 309.1(c) of this rule. One 

such individual shall be designated by the Dust Control Block Permit permittee/

holder as the Dust Control Coordinator. The Dust Control Coordinator shall be 

present on-site at all times during primary dust-generating activities that are 

related to the purposes for which the permit was obtained.

SECTION 400 – ADMINISTRATIVE REQUIREMENTS

401 DUST CONTROL PERMIT REQUIREMENTS:

401.1 To apply for a Dust Control permit, an applicant shall complete a permit 

application in the manner and form prescribed by the Control Officer. At a 

minimum, such application shall contain the following information:

a. Applicant information;

b. Project information, which shall include a project site drawing and, if the site 

is one acre or larger, soil designations; and
310–27

c. Dust Control Plan, which shall meet the specifications described in Section 

402 of this rule.

401.2 A Dust Control permit shall be granted subject to, but not limited to, the following 

conditions:

a. The permittee shall be responsible for ensuring that all persons abide by the 

conditions of the Dust Control permit and these regulations;

b. The permittee shall be responsible for supplying complete copies of the Dust 

Control permit including the Dust Control Plan, to all project contractors and 

subcontractors;

c. The permittee shall be responsible for all permit conditions, until a Permit 

Cancellation Request form has been submitted by the owner and/or operator 

and approved by the Control Officer;

d. The permittee shall be responsible for providing Dust Control Coordinator’s/

Coordinators’ name(s) and dust control training certification information/

number(s) to the Control Officer and for keeping such information updated.

401.3 The signature of the permittee on the Dust Control permit application shall 

constitute agreement to accept responsibility for meeting the conditions of the 

Dust Control permit and for ensuring that control measures are implemented 

throughout the project site and during the duration of the project.

402 DUST CONTROL PLAN REQUIREMENTS:

402.1 The owner and/or operator of a dust-generating operation shall submit to the 

Control Officer a Dust Control Plan with any permit applications that involve 

dust-generating operations with a disturbed surface area that equals or exceeds 

0.10 acre (4,356 square feet) including both of the following situations:

a. When submitting an application for a Dust Control permit involving dustgenerating operations that would equal or exceed 0.10 acre (4,356 square 

feet), and

b. Before commencing any routine dust-generating operation at a site that has 

obtained or must obtain a Title V, Non-Title V, or General permit under 

Regulation II (Permits and Fees) of these rules.

402.2 The owner and/or operator of a dust-generating operation shall submit to the 

Control Officer a Dust Control Plan with any application for a Dust Control 

permit. Applicants shall describe, in a Dust Control Plan, all control measures to 

be implemented before, after, and while conducting any dust-generating

operation, including during weekends, after work hours, and on holidays.
310–28

402.3 A Dust Control Plan shall, at a minimum, contain all of the following 

information:

a. Name(s), address(es), and phone numbers of person(s) responsible for the 

submittal and implementation of the Dust Control Plan and responsible for the 

dust-generating operation.

b. A drawing, on 81⁄2” x 11” paper, that shows:

(1) Entire project site/facility boundaries, including boundaries of areas to be 

disturbed if less than entire project site/facility boundaries,

(2) Acres to be disturbed with linear dimensions or certification by a licensed 

engineer or surveyor showing the total square footage to be disturbed,

(3) Nearest public roads,

(4) North arrow,

(5) Planned exit locations onto areas accessible to the public, and

(6) Unpaved parking lot(s).

c. Appropriate control measures, or a combination thereof, as described in 

Sections 305 and 306 of this rule, for every actual and potential dustgenerating operation.

(1) Control measures must be implemented before, after, and while 

conducting any dust-generating operation, including during weekends, 

after work hours, and on holidays.

(2) All required control measures and at least one contingency control 

measure must be identified for all dust-generating operations.

(3) A control measure that is not listed in Section 305 or in Section 306 of this 

rule may be chosen provided that such control measure is implemented to 

comply with the requirements of this rule.

(4) If complying with Section 305.7(e) of this rule, the Dust Control Plan 

must include the maximum number of vehicle trips on the unpaved 

haul/access roads each day (including number of employee vehicles, 

earthmoving equipment, haul trucks, and water trucks).

d. Dust suppressants to be applied, including all of the following product 

specifications or label instructions for approved usage:
310–29

(1) Method, frequency, and intensity of application;

(2) Type, number, and capacity of application equipment; and

(3) Information on environmental impacts and approvals or certifications 

related to appropriate and safe use for ground application.

e. Specific surface treatment(s) and/or control measures utilized to control 

material trackout and sedimentation where unpaved roads and/or access points 

join areas accessible to the public.

402.4 The Control Officer shall approve, disapprove, or conditionally approve the Dust 

Control Plan, in accordance with the criteria used to approve, disapprove or 

conditionally approve a permit, as described in Rule 200: Permit Requirements of 

these rules. 

402.5 For construction projects one acre or larger, except for routine maintenance and 

repair done under a Dust Control Block Permit, a statement disclosing which of 

the four designated texture(s) of soil described in Appendix F of these rules is 

naturally present at or will be imported to the dust-generating operation. The 

measured soil content at a particular site shall take precedence over any mapped 

soil types, and whenever soils have been tested at a particular site, the test results 

should be relied on rather than the map in Appendix F of these rules.

402.6 Should any primary control measure(s) prove ineffective, the owner and/or 

operator shall immediately implement the contingency control measure(s). If the 

identified contingency control measure is effective to comply with all of the 

requirements of this rule, the owner and/or operator need not revise the Dust 

Control Plan.

403 DUST CONTROL PLAN REVISIONS:

403.1 If Required by the Control Officer:

a. If the Control Officer determines that an approved Dust Control Plan has been 

followed, yet fugitive dust emissions from any dust-generating operation still 

exceed the standards of this rule, then the Control Officer shall issue a written 

notice to the owner and/or operator of the dust-generating operation 

explaining such determination.

b. The owner and/or operator of a dust-generating operation shall make written 

revisions to the Dust Control Plan and shall submit such revised Dust Control 

Plan to the Control Officer within three working days of receipt of the Control 

Officer’s written notice, unless such time period is extended by the Control 

Officer, upon request, for good cause. During the time that such owner and/or 
310–30

operator is preparing revisions to the approved Dust Control Plan, such owner 

and/or operator must still comply with all requirements of this rule.

403.2 If Requested by the Permittee:

a. If the acreage of a project changes, the owner and/or operator shall request a 

Dust Control Plan revision. Such Dust Control Plan revision shall be filed in 

the manner and form prescribed by the Control Officer.

b. If the permit holder changes, the owner and/or operator shall request a Dust 

Control Plan revision. Such Dust Control Plan revision shall be filed in the 

manner and form prescribed by the Control Officer.

c. If the name(s), address(es), or phone numbers of person(s) responsible for the 

submittal and implementation of the Dust Control Plan and responsible for the 

dust-generating operation change, the owner and/or operator shall request a 

Dust Control Plan revision. Such Dust Control Plan revision shall be filed in 

the manner and form prescribed by the Control Officer.

d. If the activities related to the purposes for which the Dust Control permit was 

obtained change, the owner and/or operator shall request a Dust Control Plan 

revision. Such Dust Control Plan revision shall be filed in the manner and 

form prescribed by the Control Officer.

403.3 If Rule 310 is Revised:

a. If any changes to a Dust Control Plan are necessary as a result of the most 

recent revisions of this rule, such changes to the Dust Control Plan shall not 

be required until the associated Dust Control permit is required to be renewed.

b. If any changes to a Dust Control Plan associated with a Title V permit or with 

a Non-Title V permit are necessary as a result of the most recent revisions of 

this rule, then the owner and/or operator shall submit a revised Dust Control 

Plan to the Control Officer, according to the minor permit revision procedures 

described in Rule 210 or in Rule 220 of these rules respectively, no later than 

six months after the effective date of the most recent revisions to this rule.

404 DUST CONTROL BLOCK PERMIT REQUIREMENTS:

404.1 A Dust Control Block Permit application may be submitted to the Control Officer, 

if one or more of the activities listed in this section of this rule are conducted and 

if such activities occur at more than one site (i.e., projects that involve multiple 

small areas scattered throughout Maricopa County including, but not limited to, 

fiber optic cable installation and natural gas line extension). New construction 

shall obtain a separate Dust Control permit.
310–31

a. Routine operation (i.e., municipalities, governmental agencies, and utilities 

that are responsible for the repeat maintenance of infrastructure including, but 

not limited to, weed control around a prison, canal bank and road grading, and 

road shoulder grading).

b. Maintenance (i.e., municipalities, governmental agencies, and utilities that are 

responsible for the repeat maintenance of infrastructure including, but not 

limited to, weed control around a prison, canal bank and road grading, and 

road shoulder grading).

c. Expansion or extension of utilities, paved roads, unpaved roads, road 

shoulders, alleys, and public rights-of-way at non-contiguous sites by 

municipalities, governmental agencies, and utilities.

404.2 When completing and submitting a Dust Control Block Permit application, the 

owner and/or operator shall comply with the following requirements:

a. A Dust Control Plan that meets the criteria described in Section 402 of this 

rule and applies to all sites shall be submitted to the Control Officer with the 

Dust Control Block Permit application.

b. A description or map of the owner’s and/or operator’s service areas and a list 

of all sites that are 0.10 acre (4,356 square feet) or greater, including the 

location and size of each site, shall be submitted to the Control Officer with 

the Dust Control Block Permit application.

c. For any project that is 0.10 acre (4,356 square feet) or greater and not listed in 

the Dust Control Block Permit application, the applicant shall notify the 

Control Officer in writing at least three working days prior to commencing the 

dust-generating operation. The notice shall include the site location, size, type 

of activity, and start date.

404.3 The Dust Control Block Permit will cover crews that work for the municipalities, 

governmental agencies, and utilities, including subcontractors. However, 

municipalities, governmental agencies, and utilities shall retain overall authority 

for dust control on the project.

405 APPROVAL OR DENIAL OF PERMIT APPLICATIONS FOR DUSTGENERATING OPERATIONS: The Control Officer shall take final action on a Dust 

Control permit application, a Dust Control permit revision, or a Dust Control Block 

Permit within 14 calendar days of the filing of the complete application. The Control 

Officer shall notify the applicant in writing of his approval or denial.

406 TERMS FOR PERMITS FOR DUST-GENERATING OPERATIONS: A Dust 

Control permit issued according to this rule shall be issued for a period of one year from 

the date of issuance. Should the project last longer than one year from the date the permit 
310–32

was issued, the permittee shall re-apply for a Dust Control Permit at least 14 calendar 

days prior to the expiration date of the original permit. For the purpose of this section, a 

permit is considered expired, if a permit renewal is not applied for at least 14 calendar 

days prior to the expiration date of the original permit.

407 DEFACING, ALTERING, FORGING, COUNTERFEITING, OR FALSIFYING 

PERMITS FOR DUST-GENERATING OPERATIONS: A person shall not willfully 

deface, alter, forge, counterfeit, or falsify any Dust Control permit issued under the 

provisions of this rule.

408 FEES FOR PERMITS FOR DUST-GENERATING OPERATIONS: No Dust 

Control permit is valid until the applicable Dust Control permit fee has been received and 

until the Dust Control permit is issued by the Control Officer.

409 POSTING OF PERMITS FOR DUST-GENERATING OPERATIONS: A Dust 

Control permit and a Dust Control Plan, as approved by the Control Officer, shall be 

posted in a conspicuous location at the work site, within on-site equipment, or in an onsite vehicle, or shall otherwise be kept available on-site at all times.

410 COMPLIANCE SCHEDULE: The newly amended provisions of this rule become 

effective upon adoption of this rule. An owner and/or operator of a dust-generating

operation subject to this rule shall meet all applicable provisions of this rule upon 

adoption of the newly amended provisions of this rule and according to the following 

schedule:

410.1 Basic Dust Control Training Class: No later than December 31, 2008, a site 

superintendent or other designated on-site representative of the permit holder and 

water truck and water pull drivers for each site shall have successfully completed 

the Basic Dust Control Training Class, as described in Section 309.1 of this rule.

410.2 Dust Control Coordinator: No later than June 30, 2008, any site and/or any 

contiguous site under common control of five acres or more of disturbed surface 

area subject to a permit shall, at all times during primary dust-generating

operations related to the purposes for which the Dust Control permit was 

obtained, have on-site at least one individual designated by the permit holder as a 

Dust Control Coordinator, as described in Section 310 of this rule.

SECTION 500 – MONITORING AND RECORDS

501 COMPLIANCE DETERMINATION: To determine compliance with the visible 

emissions requirements in Section 303 of this rule and with the stabilization requirements 

in Section 304 of this rule, the following test methods shall be followed:

501.1 Opacity Observations:
310–33

a. Dust-Generating Operations: Opacity observations of dust-generating

operations shall be conducted in accordance with Appendix C, Section 3

(Visual Opacity Determination of Emissions from Dust-Generating 

Operations) of these rules.

b. Unpaved Parking Lot: Opacity observations of any unpaved parking lot shall 

be conducted in accordance with Appendix C, Section 2.1 (Test Methods for 

Stabilization for Unpaved Roads and Unpaved Parking Lots) of these rules.

c. Unpaved Haul/Access Road: Opacity observations of any unpaved 

haul/access road (whether at a work site that is under construction or at a work 

site that is temporarily or permanently inactive) shall be conducted in 

accordance with Appendix C, Section 2.1 (Test Methods for Stabilization for 

Unpaved Roads and Unpaved Parking Lots) of these rules.

d. Visible Emissions Beyond the Property Line: Opacity observations of any 

visible emissions beyond the property line shall be conducted in accordance 

with EPA Reference Method 22.

501.2 Stabilization Observations:

a. Unpaved Parking Lot: Stabilization observations for unpaved parking lots 

shall be conducted in accordance with Appendix C, Section 2.1 (Test Methods 

for Stabilization for Unpaved Roads and Unpaved Parking Lots) of these 

rules. When more than one test method is permitted for a determination, an 

exceedance of the limits established in this rule determined by any of the 

applicable test methods shall constitute a violation of this rule.

b. Unpaved Haul/Access Road: Stabilization observations for unpaved haul/

access roads (whether at a work site that is under construction or at a work site 

that is temporarily or permanently inactive) shall be conducted in accordance 

with Appendix C, Section 2.1 (Test Methods for Stabilization for Unpaved 

Roads and Unpaved Parking Lots) of these rules. When more than one test 

method is permitted for a determination, an exceedance of the limits established in this rule determined by any of the applicable test methods shall 

constitute a violation of this rule.

c. Disturbed Surface Area: Stabilization observations for any disturbed surface 

area on which no activity is occurring (whether at a work site that is under 

construction, at a work site that is temporarily or permanently inactive) shall

be conducted in accordance with at least one of the techniques described in

Section 501.2(c)(1) through Section 501.2(c)(7) below, as applicable. The 

owner and/or operator of such inactive disturbed surface area shall be 

considered in violation of this rule if such inactive disturbed surface area is 

not maintained in a manner that meets at least one of the standards described 

in Section 304.3 of this rule, as applicable.
310–34

(1) Appendix C, Section 2.3 (Test Methods for Stabilization: Soil Crust 

Determination: the Drop Ball Test) of these rules for a soil crust; or

(2) Appendix C, Section 2.4 (Test Methods for Stabilization: Determination 

of Threshold Friction Velocity [TFV]: Sieving Field Procedure) of these 

rules for threshold friction velocity (TFV) corrected for non-erodible 

elements of 100 cm/second or higher; or

(3) Appendix C, Section 2.5 (Test Methods for Stabilization: Determination 

of Flat Vegetative Cover) of these rules for flat vegetation cover (i.e., 

attached [rooted] vegetation or unattached vegetative debris lying on the 

surface with a predominant horizontal orientation that is not subject to 

movement by wind) that is equal to at least 50%; or

(4) Appendix C, Section 2.6 (Test Methods for Stabilization: Determination 

of Standing Vegetative Cover) of these rules for standing vegetation cover 

(i.e., vegetation that is attached [rooted] with a predominant vertical 

orientation) that is equal to or greater than 30%; or

(5) Appendix C, Section 2.6 (Test Methods for Stabilization: Determination 

of Standing Vegetative Cover) of these rules for standing vegetation cover 

(i.e., vegetation that is attached [rooted] with a predominant vertical 

orientation) that is equal to or greater than 10% and where the threshold 

friction velocity is equal to or greater than 43 cm/second when corrected 

for non-erodible elements; or

(6) Appendix C, Section 2.7 (Test Methods for Stabilization: Rock Test 

Method) of these rules for a percent cover that is equal to or greater than 

10%, for non-erodible elements; or

(7) An alternative and equivalent test method approved in writing by the 

Control Officer and the Administrator.

502 RECORDKEEPING:

502.1 Any person who conducts dust-generating operations that require a Dust Control 

Plan shall keep a written record of self-inspection on each day dust-generating

operations are conducted. Self-inspection records shall include daily inspections 

for crusted or damp soil, trackout conditions and clean-up measures, daily water 

usage for dust control measures, and dust suppressant application. Such written 

record shall also include the following information:

a. Method, frequency, and intensity of application or implementation of the 

control measures;
310–35

b. Method, frequency, and amount of water application to the site;

c. Street sweeping frequency;

d. Types of surface treatments applied to and maintenance of trackout control 

devices, gravel pads, fences, wind barriers, and tarps;

e. Types and results of test methods conducted;

f. If contingency control measures are implemented, actual application or implementation of contingency control measures and why contingency control 

measures were implemented;

g. List of subcontractors’ names and registration numbers updated when changes 

are made; and

h. Names of employee(s) who successfully completed dust control training 

class(es) required by Section 309 of this rule, date of the class(es) that such 

employee(s) successfully completed, and name of the agency/representative 

who conducted such class(es).

502.2 Any person who conducts dust-generating operations that do not require a Dust 

Control Plan shall compile and retain records (including records on any street 

sweeping, water applications, and maintenance of trackout control devices, gravel 

pads, fences, wind barriers, and tarps) that provide evidence of control measure 

application, by indicating the type of treatment or control measure, extent of 

coverage, and date applied.

502.3 Upon verbal or written request by the Control Officer, the log or the records and 

supporting documentation shall be provided as soon as possible but no later than 

48 hours, excluding weekends. If the Control Officer is at the site where requested 

records are kept, records shall be provided without delay.

503 RECORDS RETENTION: Any person who conducts dust-generating operations that 

require a Dust Control Plan shall retain copies of approved Dust Control Plans, control 

measures implementation records, and all supporting documentation for at least six 

months following the termination of the dust-generating operation and for at least two 

years from the date such records were initiated. If a person has obtained a Title V Permit 

and is subject to the requirements of this rule, then such person shall retain records 

required by this rule for at least five years from the date such records are established.

504 TEST METHODS INCORPORATED BY REFERENCE: The test methods listed in 

this section are incorporated by reference. These incorporations by reference include no 

future editions or amendments. Copies of the test methods listed in this section are 

available for review at the Maricopa County Air Quality Department, 1001 North Central 

Avenue, Phoenix, AZ, 85004.
310–36

504.1 ASTM Method C136-06 (“Standard Test Method for Sieve Analysis of Fine and

Coarse Aggregates”), 2006 edition.

504.2 ASTM Method D2216-05 (“Standard Test Method for Laboratory Determination 

of Water [Moisture] Content of Soil and Rock by Mass”), 2005 edition.

504.3 ASTM Method D1557-02e1 (“Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3

)”), 2002 

edition.

504.4 EPA Reference Method 22 (“Visual Determination of Fugitive Emissions from

Material Sources and Smoke Emissions from Flares”), 2000 edition.