( Adopted : 02/07/76; Amended : 11/06/92; Amended : 07/09/93; Amended : 02/14/97: Amended mm/dd/yy)

AVAQMD Rule 403 403-1 Fugitive Dust D3a, 2/24/10 

## RULE 403 Fugitive Dust

( a A) General

(1 ) Purpose

(a) The purpose of this rule is to reduce the amount of particulate

matter Particulate Matter

entrained in the ambient air as a result of anthropogenic (man-made) fugitive dust Fugitive Dust sources by requiring actions to prevent, reduce or mitigate fugitive dust Fugitive Dust emissions.

( b 2 ) Applicability

(a) The provisions of this rule shall apply to any acti vity or man-made condition capable of generating fugitive dust Fugitive Dust

. 

### ( c B ) Definitions

(1) ACTIVE OPERATIONS shall mean any “Active Operations” – Any activity capable of generating fugitive dust Fugitive Dust , including, but not limited to, earth

- movi ng activities, construction/demolition activities Earth-Moving Activities, Construction/Demolition Activities , or heavy- and light-duty vehicular

movement.

(2) ANEMOMETERS are devices used to measure wind speed and direction in accordance with “Agricultural Operation” – The growing and harvesti ng of crops

or the performance standards, and maintenance and calibrat ion criteria as contained in the most recent Rule 403 Implementatio n Handbook, now or hereafter adopted by the Governing Board.

(3) BEST AVAILABLE C ONTROL MEASURES represent fugitive dust control actions which are required to be implemented within the boundaries of the South Coast Air Basin. A detailed listing raising of best available control measures fowl or animals for each fugitive dust source type shall be as contained in the most recent Rule 403 Implementation Handbook, now or her eafter adopted by the Governing Board the primary purpose of making a profit, providing a livelihood, or conducting agricultural research or instruction by an educational institution.403-2 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 Agricultural Operations do not include activities i nvolving the processing or distribution of crops or fowl

.
(4) BULK MATERIAL is sand (3) “Air Pollution Control Officer (APCO)” – The person appointed to the position of Air Polluti on Control Officer pursuant to the provisions of Health and Safety Code §40750 and his or her designee.

(4) “Anemometers” – Devices used to measure wind sp eed and direction.

(5) “Bulk Material” – Sand , gravel, soil, aggregate material less than two in ches in length or diameter, and other organic or inorganic particulate matter Particulate Matter

.
(5) CHEMICAL STABILIZERS mean any (6) “Chemical Stabilizers” – Any nontoxic chemical dust suppressant Dust Suppressant which must not be used if prohibited for use by the Regional Water Quality Co ntrol Boards, the California Air Resources Board, the United States Environmental Protection Agency, or any applicable law, rule or regulation; and should meet any specifications, criteria, or tests required by any federal, state, or local wate r agency. Unless otherwise indicated, the use of a non-toxic chemical stabilizer Chemical Stabilizer shall be of sufficient concentration and application frequency to maintain a stabilized surface Stabilized Surface

.
(6) CONSTRUCTION/DEMOLITION ACTI VITIES are any (7) “Construction/Demolition Activities” – Any on-site mechanical activities preparatory to or related to the building, alterati on, rehabilitation, demolition or improvement of property, including, but not limited to the following activities; grading, excavation, loading, crushing, cutting, pl aning, shaping or ground breaking.

( 7) CONTINGENCY NOTIFICATION means that the U.S. EPA ha s determined and notified the District in writing that PM 10 contingency requirements must be implemented based on a finding that: (1) PM 10 and PM 10 precursor emissions reductions were less than required at any three

- year milestone reporting interval, or (2) the region failed to attain the PM 10 standards within the time frames allotted under the Federal Clean Air Act, or (3) if as part of an Attainment/Maintenance Plan, the region is no longer in attainment of the PM 10 standards

( 8) CONTRACTOR means any “Contractor” – Any person who has a contractual arrangement to conduct an active operation for anot her person.

(9) DI STURBED SURFACE AREA means a “Disturbed Surface Area” – A portion of the earth's surface which has been physically mo ved, uncovered, destabilized, or otherwise modified from its undisturbed natural soil condition, thereby increasing the potential for emission of fugitive dust Fugitive Dust . This definition excludes those areas which have:AVAQMD Rule 403 403-3

Fugitive Dust D3a, 02/24/10

( A) been a) Been restored to a natural state, such that the vegetati ve ground cover and soil characteristics are similar to adjac ent or nearby natural conditions;

( B) been b) Been paved or otherwise covered by a permanent structure ; or

( C) sustained c) Sustained a vegetative ground cover over at least 95 70 percent of an area for a period of at least 6 six months.

(10) DUST SUPPRESSANTS are water, hygroscopic materials, or non

- toxic chemical stabilizers used as a treatment material to reduce fugitive dust emissions “Dust Control Plan (DCP)” – A District-approved document that describes what measures will be taken at a location to comply with this rule, prepared in accordance with section (D)

.
(11) EARTH

- MOVING ACTIVITIES “Dust Suppressants” – Water, hygroscopic materials, or non-toxic Chemical Stabilizers used a s a treatment material to reduce Fugitive Dust emissions.

(12) “Earth-Moving Activities” – The use of any equ ipment for any activity where soil is being moved or uncovered, and shall include, but not be limited to

, the following: grading, earth cutting and filling operations, load ing or unloading of dirt or bulk materials Bulk Materials , adding to or removing from open sto rage piles of bulk materials Open Storage Piles of Bulk Materials , landfill operations, or weed abatement through disking, and soil mulching.

(12) FUGITIVE DUST means any solid particulate matter (13) “Fugitive Dust” – Any solid Particulate Matter that becomes airborne, other than that emitted fro m an exhaust stack, directly or indirectly as a resul t of the activities of man.

( 13) INACTIVE DISTURBED SURFACE AREA means any disturbed surface area upon which active operations 14) “High Wind Conditions” – Instantaneous wind speeds (gusts) which exceed 25 miles per hour.

(15) “Inactive Disturbed Surface Area” – Any Distur bed Surface Area upon which Active Operations have not occurred or are not expected to occur for a period of

ten 20 consecutive days.

( 14) LARGE OPERATIONS means any active operations on property which contains in excess of 100 acres of disturbed surface area; o r any earth

- moving operation which exceeds a daily earth

- moving or throughput volume of 7,700 cubic meters (10,000 cubic yards) three times during the most recent 365

- day period.

(15) MEDIUM OPERATIONS means any active operations on pr operty which contains between 50 and 100 acres of disturbed surf ace area; or any earth

- moving operation with a daily earth

- moving or throughput volume of betwee n 3,850 cubic403-4 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 meters (5,000 cubic yards) and 7,700 cubic meters ( 10,000 cubic yards) three times during the most recent 365

- day period.

( 16) NON

- ROUTINE means any “Non-Routine” – Any non-periodic active operation which occurs no more than three times per year, las ts less than 30 cumulative days per year, and is scheduled less than 30 days in adv ance.

(17) OPEN STORAGE PILE is any “Open Storage Pile” – Any accumulation of bulk material Bulk Material with 5 five percent or greater silt Silt content which is not fully enclosed, covered or chemically stabilized, a nd which attains a height of three feet or more and a total surface area of 150 or more square feet. Silt content level is assumed to be 5 five percent or greater unless a person can show, by sampling and analysis in accordance with ASTM Metho d C-136 or other equivalent method approved in writing by the Executive Officer APCO and the California Air Resources Board, that the silt Silt content is less than 5 five percent. The results of ASTM Method C-136 or equivalent met hod are valid for 60 days from the date the sample was taken.

(18) PARTICULATE MATTER means any “Particulate Matter” – Any material, except uncombined water, which exists in a finely d ivided form as a liquid or solid at standard conditions.

(19) PAVED ROAD means an “Paved Road” – An improved street, highway, alley, public way, or easement that is covered by typical roadway materials excluding access roadways that connect a facility with a publ ic paved roadway Paved Road and are not open to through traffic. Public paved roads Paved Roads are those open to public access and that are owned by any fed eral, state, county, municipal or any other governmental or quasi-governmental age ncies. Private paved roads are any paved roads Paved Roads are any Paved Roads not defined as public.

(20) PM10 is particulate matter “PM 10 ” – Particulate Matter with an aerodynamic diameter smaller than or equal to 10 ten microns as measured by the applicable State and Federal state and federal reference test methods.

(21) PROPERTY LINE means the “Property Line” – The boundaries of an area in which either a person causing the emission or a per son 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 Property Line (s) shall refer to the boundaries dividing the areas of all sub-tenancies.

(22) REASONABLY AVAILABLE CONTROL MEASURES are appropria te techniques and procedures used to prevent or reduce the emission and airborne transport of fugitive dust, outside the boundaries of the So uth Coast Air Basin. These include, but are not limited to, application of dust suppressants, use ofAVAQMD Rule 403 403-5

Fugitive Dust D3a, 02/24/10

coverings or enclosures, paving, enshrouding, plant ing, reduction of vehicle speeds, and other measures as specified by the Executive Officer. A detailed listing of reasonably available control measures fo r each fugitive dust source type shall be as contained in the most recent Rule 403 I mplementation Handbook, now or hereafter adopted by the Governing Boa rd.

(23) SILT means any “Silt” – Any aggregate material with a particle size less than 7 4 micrometers in diameter which passes through a No. 200 Sieve sieve

.
(24) SIMULTANEOUS SAMPLING means the (23) “Simultaneous Sampling” – The operation of two PM 10 samplers in such a manner that one sampler is start ed within five minutes of the other, and each sampler is operated for a consecutive period which must be not less than 290 minutes and not more than 310 minutes.

( 25) SOUTH COAST AIR BASIN means the non

- desert portions of Los Angeles, Riverside, and San Bernardino counties and all of O range County as defined in California Code of Regulations, Title 17, Section 6 0104. The area is bounded on the west by the Pacific Ocean, on the north and eas t by the San Gabriel, San Bernardino, and San Jacinto Mountains, and on the s outh by the San Diego county line.

(26) STABILIZED SURFACE means:

(A) any disturbed surface area or open storage pile whi ch 24) “Stabilized Surface” – Any previously Disturbed Surface Area or Open Storage Pile which, through the application of Dust Suppressants , shows visual or other evidence of surface crusting and is resistant to wind

- driven fugitive dust;

(B) any unpaved road surface in which any fugitive dust plume emanating from vehicular traffi c does not exceed Wind-Driven Fugitive Dust and is demonstrated to be stabilized and where Visible Dust Emissions a re limited to 20 percent opacity. Chemical treatment must be performed with a subst ance not disapproved for such use by the applicable Regional Water Quali ty Control Board.

(27) UNPAVED ROADS are any unsealed or unpaved (25) “Track-out” – Any Bulk Material that adheres to and agglomerates on t he exterior surface of motor vehicles, haul trucks, and equipment (including tir es) that have been released onto a paved road and can be removed by a vacuum sweeper or a broom sweeper under normal operating conditions.

(26) “Unpaved Roads” – Any unsealed or earthen roads, equipment paths, or travel ways that are not covered by one of the following: concrete, asphaltic concrete, recycled asphalt, or asphalt. Public unpaved roads are any unpaved roadway owned by Federal, State, county, municipal or other governmental or quasi

governmental agencies. Private unpaved roads are a ll other unpaved roadways not d efined as public.403-6 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 (27) “United States Environmental Protection Agency (USEPA)” – Refers to the Administrator or the appropriate designee of the Un ited States Environmental Protection Agency.

(28) VISIBLE ROADWAY DUST means any sand, soil, dirt, or other s olid particulate matter which is “Visible Dust Emissions (VDE)” – Any dust emissions that are visible upon paved road surfaces and which can be removed b y a vacuum sweeper or a broom sweeper under normal operating condition s. to an observer.

(29) WIND

- DRIVE N FUGITIVE DUST means visible “Wind-Driven Fugitive Dust” – Visible emissions from any disturbed surface area Disturbed Surface Area which is generated by wind action alone.

(30) WIND GUST is the “Wind Gust” – The maximum instantaneous wind speed as measured by an anemometer Anemometer

. 

### ( d C ) Requirements

(1) A person shall not cause or allow the emissions of fugitive dust from any active operation, open storage pile, or disturbed surface area Fugitive Dust from:

(a) Any Active Operation, Open Storage Pile, or Di sturbed Surface Area such that the presence of such dust remains visible in t he atmosphere beyond the property line Property Line of the emission source

. ; or

(2) A person conducting active operations within the bo undaries of the South Coast Air Basin sh all utilize one or more of the applicable best avai lable control measures to minimize fugitive dust emissions from e ach fugitive dust source type which is part of the active operation.

(3) A person conducting active operations outside the b oundaries of th e South Coast Air Basin may utilize reasonably available control measures in lieu of best available control measures to minimize fugitive dus t emissions from each fugitive dust source type which is part of the active operat ion.

(4) A person shall not (b) Any applicable source such that the dust causes 20 percent opacity or greater during each observation and the total duration of such observations (not necessarily consecutive) is a cumulative three minutes or more in any one hour. Only opacity read ings from a single source shall be included in the cumulative total us ed to determine compliance.

(2) A person shall not cause or allow PM 10 levels to exceed 50 micrograms per cubic meter when determined, by simultaneous sampling Simultaneous Sampling , as the difference between upwind and downwind samples coll ected on high-volume particulate matter Particulate Matter samplers or other US EPA-approvedAVAQMD Rule 403 403-7

Fugitive Dust D3a, 02/24/10

equivalent method for PM 10 monitoring. If sampling is conducted, samplers sh all be:

(A (a ) Operated, maintained, and calibrated in accordanc e with 40 Code of Federal Regulations (CFR), Part 50, Appendix J, or appropriate US EPApublished documents for US EPA-approved equivalent method(s) for PM 10

.
( B b ) Reasonably placed upwind and downwind of key acti vity areas and as close to the property line Property Line as feasible, such that other sources of fugitive dust Fugitive Dust between the sampler and the property line Property Line are minimized.

( 5) Any person in the South Coast Air Basin shall:

(A) prevent or remove within one hour the track

- out of bulk material onto public paved roadways as a result of their operatio ns; or

(B) take at least one of the actions listed in Table 3 and:

(i) prevent the track 3) Track -out of bulk material onto public paved roadways as a result of the ir operations and remove such material at anytime t rack Operations

(a) A person shall not allow Track -out extends for a cumulative distance of greater than 50 to extend 25 feet on to any paved public road during active operations; and (ii) remove all vis ible roadway dust tracked

- out upon public paved roadways as a result of active operations or more in cumulative length from the point of origin from an active operation. Notwithstandin g the preceding, all Track-out from an active operation shall be removed at the conclusion of each work day when active operations cease workday or evening shift

.



### (e) Contingency Requirements

When a contingency notification has occurred, the r equirements of this subdivision shall become effective in the county subject to the n otification 60 days after the first publication date in newspapers of general circulati on in that county. Such publication shall specify that a contingency notification has o ccurred, and that any person who conducts or authorizes the conducting of a mediu m operation shall be required to comply with the provisions of subdivision (f), in addition to the requirements of subdivision (d).



### (f) Special Requirements for Large Operations, and Medi um Operations Under a Contingency Notification403-8 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 (1) Any person who co nducts or authorizes the conducting of either a lar ge operation which is subject to the requirements of this rule, or a medium operation under a contingency notification as set forth in subdivisio n (e), shall either:

(A) take the actions specified in Table s 1 and 2 for each applicable source of fugitive dust within the property lines and shall:

(i) notify the Executive Officer not more than 7 days a fter qualifying as a large operation or as a medium operation under a contingency notification; (ii) include, as part of the notification, the items specified i n subparagraphs (f)(3)(A) and (f) (3)(B); (iii) maintain daily records to document the specific act ions taken; (iv) maintain such records for a period of not less than 6 months; and (v) make such records a vailable to the Executive Officer upon request;

or

(B) obtain an approved fugitive dust emissions control plan (plan).

(2) Any person subject to paragraph (f)(1) who elects t o obtain an approved fugitive dust emission control plan must submit the plan to the Executive Officer no later than 30 days after the activity becomes a large ope ration.

(3) Any plan prepared pursuant to subparagraph (f)(1)(B ) shall include:

(A) The name(s), address(es), and phone number(s) of th e person(s) responsible for the prepara tion, submittal, and implementation of the plan;

(B) A description of the operation(s), including a map depicting the location of the site;

(C) A listing of all sources of fugitive dust emissions within the property lines;

(D) A description of the required control measures as applied to each of the sources identified in subparagraph (f)(3)(C). The description must be sufficiently detailed to demonstrate that the appli cable best available control measures or reasonably available control me asures will be uti lized and/or installed during all periods of active opera tions.

(4) In the event that there are special technical (e.g. , non

- economic) circumstances, including safety, which prevent the use (b) A person shall not conduct an Active Operation with a Disturbed Su rface Area of five or more acres, or with a daily import or export of 100 cubic yards or more of Bulk Material without utilizing at least one of the measures listed in subparagraphs (C)(3)(b)(i) through (C)(3)(b)(v) at each vehicle egress from the site to a paved public road.AVAQMD Rule 403 403-9

Fugitive Dust D3a, 02/24/10 (i) Install a pad consisting of washed gravel (mini mum-size: one inch) maintained in a clean condition to a depth of at least one of the required control measure for any of the sources identified in subparagraph (f)(3)(C) , a justi fication statement must be provided in lieu of the description required in subparagraph (f)(3)(D). The justification statement must explain the reason(s) why the required control measures cannot be implemented.

(5) Within 30 calendar days of the receipt o f a plan submitted pursuant to subparagraph (f)(1)(B), the Executive Officer will either approve, conditionally approve, or disapprove the plan , in writing. For a plan to be approved or conditionally approved, three conditions must be sa tisfied:

(A) All sources of fugitive dust emissions must be identifi ed (e.g., earth

moving, storage piles, vehicular traffic on unpaved roads, etc.).

(B) For each source identified, six inches and extending at least one of the required control measures must be implemented, or an acceptable justification statement pursuant to paragraph (f)(4 ) must be provided; and

30 feet wide and at least 50 feet long,

(C) If, after implementation of the required control me asures, visible dust emissions are crossing the property line(s), th en high wind measures (e.g., increased watering) must be specified for immediate implementation.

(6) Conditional approval will be made if conditions are met, but the stated measures do not satisfactorily conform to the guidance conta ined in the applicable Rule 403 Implementation Handbook. If a plan is conditionall y approved, the conditions necessary to modify the plan will be provided in wr iting to the person(s) identified in subparagraph (f)(3)(A). Such modifications must be incorporated into the plan wi thin 30 days of the receipt of the notice of condit ional approval, or the plan shall be disapproved. A letter to the Executive Of ficer stating that such modifications will be incorporated into the plan sh all be deemed (ii) Pave or apply chemical stabilization at sufficient to result in approval of the plan.

concentration and frequency to maintain a Stabilize d Surface starting from the point of intersection with the public paved sur face, and extending at least 100 feet and at least 20 feet wi de,

(7) If a p lan is disapproved by the Executive Officer

(A) The reasons for disapproval shall be given to the a pplicant in writing.

(B) Within 7 days of the receipt of a notice of a disap proved plan, the applicant shall comply with the actions specified i n Tables 1 an d 2 for each applicable source of fugitive dust within the property lines.403-10 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 (C) The applicant may resubmit a plan at any time after receiving a disapproval notification, but will not be relieved of complying with subparagraph (f)(7)(B) until such time as th e plan has been approved.

(8) Failure to comply with any of the provisions in an approved or conditionally approved plan shall be a violation of subdivision ( f).

(9) Any approved plan (iii) Utilize a wheel shaker/wheel spreading device consisting of raised dividers (rai ls, pipe, or grates) at least 24 feet long and ten feet wide to remove B ulk Material from tires and vehicle undercarriages before vehicl es exit the site,

(iv) Install and utilize a wheel washing system to remove Bulk Material from tires and vehicle undercarriages before vehicl es exit the site;

or

(v) Any other control measure approved by the APCO and the USEPA as equivalent to the methods specified in subparagr aphs (C)(3)(b)(i) through (C)(3)(b)(iv).

(4) Earth-Moving Operations

(a) A person shall not conduct an Active Operation of Construction, excavation, extraction and other Earth-Moving Activ ities with a Disturbed Surface Area of five or more acres, or with a daily import or export of 100 cubic yards or more of Bulk Material without utiliz ing at least one of the measures listed for each of the operation stages sp ecified in subparagraphs (C)(4)(a)(i) through (C)(4)(a)(iv).

(i) Pre-activity:

a. Pre-water site sufficient to limit VDE to 20 per cent opacity; and b. Phase work to reduce the amount of Disturbed Sur face Area at any one time

(ii) During Active Operations:

a. Apply water or chemical/organic stabilizers/supp ressants sufficient to limit VDE to 20 percent opacity; b. Construct and maintain wind barriers sufficient to limit VDE to 20 percent opacity. If utilizing wind barri ers, control measure (a) above shall also be implemented ; or c. Apply water or chemical/organic stabilizers/supp ressants to unpaved haul/access roads and unpaved vehicle/equip mentAVAQMD Rule 403 403-11

Fugitive Dust D3a, 02/24/10 traffic areas sufficient to limit VDE to 20 percent opacity and meet the requirements of section (C)(9).

(iii) Temporary Stabilization During Periods of Ina ctivity:

a. Restrict vehicular access to the area; and b. Apply water or chemical/organic stabilizers/supp ressants, sufficient to limit VDE to 20 percent opacity, or t o comply with the conditions of a Stabilized Surface. If an area having one-half acres or more of Disturbed Surface Area remains unused for seven or more days, the area mus t comply with the conditions for a Stabilized Surface area.

(iv) Any other control measures approved by the APC O and the USEPA as equivalent to the methods specified in sub paragraphs (C)(4)(a)(i) through(C)(4)(a)(iii).

(5) Demolition Operations

(a) A person shall implement the requirements of (C )(5)(a)(i) through (C)(5)(a)(v) when using wrecking balls or other wre cking equipment to raze or demolish buildings:

(i) Apply sufficient water to building exterior sur faces and razed building materials to limit VDE to 20 percent opaci ty throughout the duration of razing and demolition activities; (ii) Apply sufficient Dust Suppressants to unpaved surface areas where materials from razing or demolition activities will fall, or where wrecking or hauling equipment will be operated, in order to limit VDE to 20 percent opacity; (iii) Handling, storage, and transport of Bulk Mate rials on-site or offsite resulting from the demolition or razing of bui ldings shall comply with the requirements specified in section ( C)(6); and (iv) Prevention and removal of carryout or Track-ou t on paved public access roads from demolition operations shall be pe rformed in accordance with (C)(3). (v) Any other control measures approved by the APCO and the USEPA as equivalent to the methods specified in sub paragraphs (C)(5)(a)(i) through (C)(5)(a)(iv).

(6) Bulk Material Operations

(a) No person shall conduct an active operation of handling Bulk Material with a daily import or export of 100 cubic yards or more of Bulk Material without utilizing at least one of the measures list ed for each of the403-12 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 operation stages specified in subparagraphs (C)(6)( a)(i) through (C)(6)(a)(vi):

(i) Handling of Bulk Materials:

a. When handling Bulk Materials, apply water or chemical/organic stabilizers/suppressants sufficien t to limit VDE to 20 percent opacity; or b. Construct and maintain wind barriers sufficient to limit VDE to 20 percent opacity and with less than 50 per cent porosity. If utilizing fences or wind barriers, co ntrol measure (C)(6)(a)(i)[a.] shall also be implemented.

(ii) Storage of Bulk Materials:

a. When storing Bulk Materials, comply with the con ditions for a Stabilized Surface; b. Cover Bulk Materials stored outdoors with tarps, plastic, or other suitable material and anchor in such a manner that prevents the cover from being removed by wind actio n; c. Construct and maintain wind barriers sufficient to limit VDE to 20 percent opacity and with less than 50 per cent porosity. If utilizing fences or wind barriers, ap ply water or chemical/organic stabilizers/suppressants to limit VDE to 20 percent opacity; d. Utilize a three-sided structure with a height at least equal to the height of the storage pile and with less than 5 0 percent porosity; or e. Installation of wind breaks of such design so as to reduce maximum Wind Gusts to less than 25 miles per hour i n the area of the Bulk Material deposits

. (iii) On-site Transporting of Bulk Materials:

a. Limit vehicular speed while traveling on the wor k site sufficient to limit VDE to 20 percent opacity; b. Load all haul trucks such that the freeboard is not less than six inches when material is transported across any paved public access road sufficient to limit VDE to 20 pe rcent opacity; c. Apply water to the top of the load sufficient to limit VDE to 20 percent opacity; or d. Cover haul trucks with a tarp or other suitable cover.

(iv) Off-site Transporting of Bulk Materials:AVAQMD Rule 403 403-13

Fugitive Dust D3a, 02/24/10 a. Clean the interior of the cargo compartment or c over the cargo compartment before the empty truck leaves the site; b. Prevent spillage or loss of Bulk Material from h oles or other openings in the cargo compartment’s floor, si des, and/or tailgate; and c. Load all haul trucks such that the freeboard is not less than six inches when material is transported on any pave d public access road, and apply water to the top of the load sufficient to limit VDE to 20 percent opacity; or cover haul t rucks with a tarp or other suitable cover.

(v) Outdoor Transport of Bulk Materials With a Chut e or Conveyor:

a. Fully enclose the chute or conveyor; b. Operate water spray equipment that sufficiently wets materials to limit VDE to 20 percent opacity; or c. Wash separated or screened materials to remove c onveyed materials having an aerodynamic diameter of ten mic rons or less sufficient to limit VDE to 20 percent opaci ty.

(vi) Any other control measures approved by the APC O and USEPA as equivalent to the methods specified in subparagraph s (C)(6)(a)(i) through(C)(6)(a)(v).

(7) Disturbed Open Area of Three or More Acres

(a) An owner/operator of an open area with a Distur bed Surface of three or more acres that has remained undeveloped, unoccupie d, unused, or vacant for more than seven days shall do at least one of t he following:

(i) Apply and maintain water or Dust Suppressant(s) to all unvegetated areas sufficient to limit VDE to 20 per cent opacity; (ii) Establish vegetation on all previously disturb ed areas sufficient to limit VDE to 20 percent opacity; (iii) Pave, apply and maintain gravel, or apply and maintain chemical/organic stabilizers/suppressants sufficien t to limit VDE to 20 percent opacity; (iv) Upon evidence of trespass, prevent unauthorize d vehicle access by posting “No Trespassing” signs or installing physic al barriers such as fences, gates, posts, and/or other appropriate b arriers to effectively prevent access to the area; or 

### (v) Any other control measures approved by the APCO and the USEPA as equivalent to the methods specified in sub paragraphs (C)(7)(a)(i) through(C)(7)(a)(iv).

(8) Unpaved Roads at Industrial or Commercial Facil ities403-14 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 (a) An owner/operator of an Unpaved Road at an indu strial or commercial facility shall limit VDE to 20 percent opacity from the Unpaved Road segment by application and/or maintenance of at lea st one of the following control measures, or shall implement an APCO approv ed Dust Control Plan:

(i) Apply and maintain water or Dust Suppressant(s) sufficient to limit VDE to 20 percent opacity; (ii) Pave, apply and maintain gravel, or apply and maintain chemical/organic stabilizers/suppressants sufficien t to limit VDE to 20 percent opacity; (iii) Restrict vehicle speed to 15 miles per hour; or (iv) Any other method that effectively limits VDE t o 20 percent opacity and results in a stabilized Unpaved Road surface.

(9) Unpaved Vehicle/Equipment Traffic Area

(a) An owner/operator of an unpaved vehicle/equipme nt traffic area shall limit VDE to 20 percent opacity from the unpaved vehicle/ equipment traffic area by application and/or maintenance of at least one of the following control measures, or shall implement an APCO approv ed Dust Control Plan:

(i) Apply and maintain water or Dust Suppressant(s) sufficient to limit VDE to 20 percent opacity; (ii) Pave, apply and maintain gravel, or apply and maintain chemical/organic stabilizers/suppressants sufficien t to limit VDE to 20 percent opacity; (iii) Restrict vehicle speed to 15 miles per hour; (iv) An owner/operator shall restrict access and pe riodically stabilize a Disturbed Surface Area whenever a site becomes an I nactive Disturbed Surface Area to comply with the condition s for a Stabilized Surface; or 

### (v) Any other method that effectively limits VDE to 20 percent opacity and results in a Stabilized Surface.

(10) A person performing Earth-Moving Activities du ring High Wind Conditions shall:

(a) Cease all Active Operations; or

(b) Apply water to soil not more than 15 minutes pr ior to moving such soil to limit VDE to 20 percent opacity

. (11) The owner/operator of Disturbed Surface Areas during High Wind Conditions shall:AVAQMD Rule 403 403-15

Fugitive Dust D3a, 02/24/10

(a) Apply water with a mixture of Chemical Stabiliz er diluted to not less than 1/20 of the concentration required to maintain a St abilized Surface for a period of six months only on the last day of Active Operations prior to a weekend, holiday, or any other period when Active O perations will not occur for not more than four consecutive days;

(b) Apply Chemical Stabilizers prior to high wind e vent;

(c) Apply water to all unstabilized Disturbed Areas three times per day. Watering frequency should be increased to a minimum of four times per day if there is any evidence of visible Wind-Driven Fugitive Dust;

(d) Establish a vegetative ground cover within 30 d ays after Active Operations have ceased. Ground cover must be of sufficient de nsity to expose less than 30 percent of unstabilized ground within 90 da ys of planting, and at all times thereafter;

(e) Apply Chemical Stabilizers within seven working days of grading completion; or

(f) Utilize any combination of control actions list ed such that, in total, these actions apply to all Disturbed Surface Areas.

(12) Owners/operators of Unpaved Roads during high winds shall:

(a) Apply Chemical Stabilizers prior to wind event;

(b) Apply water once per hour during active operati on; or

(c) Stop all vehicular traffic.

(13) Owners/operators of Open Storage Piles during high winds shall:

(a) Apply Chemical Stabilizers;

(b) Apply water to at lest 70 percent of the surfac e area of all Open Storage Piles on a daily basis when there is evidence of Wi nd-Driven Fugitive Dust;

(c) Install temporary coverings; or

(d) Install a three sided enclosure which will exte nd, at a minimum, to the top of the pile.

(14) Owners/operators of all categories during high winds shall:403-16 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 (a) Use any other control measures approved by the APCO and the USEPA as equivalent to the methods specified in section (C).



### (D) Dust Control Plan

(1) An owner/operator shall submit a Dust Control P lan (DCP) to the APCO prior to the start of any construction activity on any site that will include ten acres or more of Disturbed Surface Area for residential developme nts, or five acres or more of Disturbed Surface Area for non-residential developm ent, or will include moving, depositing, or relocating more than 2,500 cubic yar ds per day of Bulk Materials on at least three days. Construction activities shall not commence until the APCO has approved or conditionally approved the DCP. An owner/operator shall provide written notification to the APCO within ten days prior to the commencement of Earth-Moving Activities via fax or mail. The requirement to submit a DCP shall apply to all such activities con ducted for residential and nonresidential (e.g., commercial, industrial, or insti tutional) purposes or conducted by any governmental entity.

(a) Install and maintain project signage with proje ct contact prior to initiating any Earth-Moving Activities that;

(i) Identifies phone numbers for dust complaints; a nd (ii) Meets minimum standards of Rule 403, Appendix “A”

(b) An owner/operator may submit one DCP covering m ultiple projects at different sites where construction will commence wi thin the next 12 months provided the DCP includes each project size, location, and types of activities to be performed. The DCP shall specify the expected start and completion date of each project.

(c) The DCP shall describe all Fugitive Dust contro l measures to be implemented before, during, and after any dust gene rating activity.

(d) A DCP shall contain all the information describ ed in section (D)(1)(h)(i) through (D)(1)(h)(viii). The APCO shall approve, d isapprove, or conditionally approve the DCP within ten days of DC P submittal. A DCP is deemed automatically approved if, after ten days following receipt by the District, the District does not provide any com ments to the owner/operator regarding the DCP.

(e) An owner/operator shall submit a copy of a DCP approval letter to the building and safety authority prior to issuance of a grading permit.

(f) An owner/operator shall retain a copy of an app roved DCP at the project site. The approved DCP shall remain valid until th e termination of all dust generating activities. Failure to comply with the provisions of anAVAQMD Rule 403 403-17

Fugitive Dust D3a, 02/24/10

approved DCP is deemed to be a violation of this ru le. Regardless of whether an approved DCP is in place or not, or even when the owner/operator responsible for the DCP is complying with an approved DCP, the owner/operator is still subject to comply with all requirements of Rule 403 at all times.

(g) An owner/operator shall maintain daily records to document the specific dust control actions taken, maintain such records f or a period of not less than three years; and make such records available t o the APCO upon request.

(h) A DCP shall contain all of the following inform ation:

(i) Name(s), address(es), and phone number(s) of pe rson(s) and owner(s)/operator(s) responsible for the preparatio n, submittal, and implementation of the DCP and responsible for the d ust generating operation and the application of dust control measu res.

(ii) A plot plan which shows the type and location of each project.

(iii) The total area of land surface to be disturbe d, daily throughput volume of earthmoving in cubic yards, and total are a in acres of the entire project site.

(iv) The expected start and completion dates of dus t generating and soil disturbance activities to be performed on the site.

(v) The actual and potential sources of Fugitive Du st emissions on the site and the location of Bulk Material handling and storage areas, paved and Unpaved Roads; entrances and exits where carryout/Track-out may occur; and traffic areas.

(vi) Dust Suppressants to be applied, including: pr oduct specifications; manufacturer’s usage instructions (method, frequenc y, and intensity of application); type, number, and capaci ty of application equipment; and information on environmental impacts and approvals or certifications related to appropriate and safe use for ground application.

(vii) Specific surface treatment(s) and/or control measures utilized to control material carryout, Track-out, and sedimenta tion where unpaved and/or access points join paved public acce ss roads.

(viii) Identify a dust control supervisor that:

a. Is employed by or contracted with the property o wner or developer;403-18 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 b. Is on the site or available on-site within 30 mi nutes during working hours; c. Has the authority to expeditiously employ suffic ient dust mitigation measures to ensure compliance with Rule requirements; and d. Has completed the AVAQMD Fugitive Dust Control C lass and has been issued a valid Certification of Comple tion for the class.

(i) Notify the APCO in writing within 30 days after the site no longer qualifies as an active operation.

(j) Any approved DCP shall be valid for a period of one year from the d ate of approval or conditional approval of the plan. Plans DCP. DCPs must be resubmitted annually, at least 60 days prior to the expiration date, or the plan DCP shall become disapproved as of the expiration date. If all fugitive dust Fugitive Dust sources and corresponding reasonably available control measures or special circumstances remain identical to those identified in the previously approved plan DCP , the resubmittal may contain a simple statement of no-change. Otherwise, a resubmittal must contain all the items specified in subparagraphs ( f)(3)(A through D).

D)(1)(h).

( 10) Any person subject to the requirements of paragraph (f)(1) who no longer exceeds, and does not expect to exceed for a pe riod of at least one year, the criteria for a large operation or a medium operatio n under a contingency notification may request a reclassification as a no n

- large operation not subject to subparagraph (f). To obtain this reclassification, a person must su bmit a request in writing to the Executive Officer specifying the conditions which have taken place to reduce the disturbed surface area and/or t he earth

- moving or throughput conditions to levels below the criteria for large o perations. A person must furt her indicate that the criteria for large operations are not expected to be exceeded during the subsequent 12

- month period. The Executive Officer shall either approve or disapprove the reclassification within 6 0 days from receipt of the reclassification re quest. The Executive Officer will disapprove the r equest if the indicated changes can not be verified to be below t he criteria for large operations or a medium operation under a contingency notificat ion. If approved, the person shall be relieved of all r equirements under subdivision (f). Any person so reclassified would again be subject to the requirem ents of subdivision (f) if at any time subsequent to the reclassification the criteri a for large operations or a medium operation under a contingency notif ication are met.

(11) A person responsible for more than one operation su bject to subparagraph (f) at

non

- contiguous sites may submit one plan covering multi ple sites provided that:AVAQMD Rule 403 403-19

Fugitive Dust D3a, 02/24/10

(A) the contents of the plan apply similarly to all sit es; and

(B) specifi c information is provided for each site, including, map of site location, address, description of operations, and a listing of all sources of fugitive dust emissions within the property lines.



### (g E ) Compliance Schedule

All the newly amended provisions of this rule shall become effective upon adoption of this Rule Amendment. Pursuant to subdivision (f), any f ugitive dust emission control plan which has been approved or conditionally appro ved prior to the date of adoption of these amendments shall remain in e ffect and the plan approval date and annual resubmittal date shall remain unchanged. If any ch anges to such plans are necessary as a result of these amendments, such changes shall not be required until the annual resubmittal date, pursuant to paragraph (f )(9) rule amendment

. 

### ( h) F) Exemptions

(1) The provisions of this rule shall not apply to:

( A a ) Agricultural operations outside the boundaries of the South Coas t Air Basin and agricultural operations conducted within the boundaries of the South Coast Air Bas in provided that the combined disturbed surface are a is less than 10 acres. Operations.

(B) Agricultural operations within the South Coast Air Basin, until December 31, 1998, whose combined disturbed surface area inc ludes more than 10 acres. All provisio ns of this Rule shall become applicable to agricult ural operations exceeding 10 acres beginning January 1, 1999 unless the person responsible for such operations:

(i) Submits a soil erosion control plan which includes best management practices for reducin g PM 10 emissions by September 1, 1998 and obtains approval of the soil erosion co ntrol plan in writing from the Executive Officer prior to Decembe r 31, 1998; and (ii) Implements all provisions of the soil erosion contr ol plan within 30 days after receipt o f the approved plan by the Executive Officer.

(C) Any disturbed surface area (b) Unpaved Roads not part of an industrial or commercial facility.

(c) Any Disturbed Surface Area less than one-half (1/2) acre on property zoned for residential uses.403-20 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 ( D) d) Active operations Operations conducted during emergency life-threatening situations, or in conjunction with any officially d eclared disaster or state of

emergency.

( E e ) Active operations Operations conducted by essential service utilities to provide electricity, natural gas, telephone, water and sewer during periods of service outages and emergency disruptions.

( F) f) Any contractor Contractor subsequent to the time the contract ends, provided that such contractor Contractor implemented the required control measures during the contractual period.

( G g ) Any grading contractor Contractor , for a phase of active operations Active Operations , subsequent to the contractual completion of that phase of earth

- moving activities, Earth-Moving Activities, provided that the required control measures have been implemented dur ing the entire phase of earth

- moving activities Earth-Moving Activities , through and including five days after the final grading inspection.

( H) h) Weed abatement operations ordered by a county agri cultural commissioner or any state, county, or municipal fire department, provided that:

(i) mowing Mowing , cutting or other similar process is used which maintains weed stubble at least three inches above the soil; or and (ii) any discing (ii) Any disking or similar operation which cuts into and disturbs the soil , where watering is used and meets the following conditions: [ prior to initiation of these activities, and a ] A determination is made by the agency issuing agency of the weed abatement order that, due to fire hazard conditions, rocks, o r other physical obstructions, it is not practical to meet the conditions specified in clause(h)(1)(H)(i) and [b] Such determination is made in writing and provided to the person conducting the weed abatement operation prio r to begin ning such activity; and [c] Such written determination is provided to the Execu tive Officer upon request from the person conducting the weed abatement operation. (Note: (F)(1)(h)(i). The provisions of this clause (h)(1)(H)(ii) do shall not exempt the owner of any property from controlling fugitive dust emissions emanating from disturbed surface areas stabilizing Disturbed Surface Areas which have been created as a result of the weed abatement actions. )AVAQMD Rule 403 403-21

Fugitive Dust D3a, 02/24/10 (2) The provisions of paragraphs (d)(1) and (d)(4) shal l not apply:

(A) When wind gusts exceed 25 miles per hour, provided that:

(i) The required control measures for high wind conditi ons are implemented for each applicable fugitive dust sourc e type, as specified in Table 1, and; (ii) Records are maintained i n accordance with clauses (f)(1)(A)(iii), (f)(1)(A)(iv) and (f)(1)(A)(v); and (iii) In the event there are technical (e.g., non

- economic) reasons, including safety, why any of the required control m easures in Table 1 cannot be implemented for one or more f ugitive dust source categories, a person submits a "High Wind Fugitive Dust Control Plan" (HW

- Plan). The HW

- Plan must further provide an alternative measure of fugitive dust control, if te chnically feasible. Such plan will be subject to the same approval conditions as specified in subparagraphs (f)(5) and (f)(6);

(B) To unpaved roads, provided such roads:

(i) are used solely for the maintenance of wind

- generating equipment;

or meet all of the following criteria: [a] are less than 50 feet in width at all points along the road; [b] are within 25 feet of the property line; and [c] have a traffic volume less than 20 vehicle

- trips per day.

(C) To any active operation, open storage pile, or dist urbed surface area for which necessary fugitive dust preventive or mitigative actions are in conflict with the federal Endangered Species Act.

(D) To non

- routine or emergency maintenance of flood control c hannels and water spreading basins.

(3) The provisions of paragraphs (d)(1), (d)(2), and (d )(4) shall not apply to:

(A) Blasting operations which have been permitted by t he California Division of Industrial Safety ; and

.
( B j ) Motion picture, television, and video production activities when dust emissions are required for visual effects. In orde r to obtain this exemption, the Executive Officer APCO must receive notification in403-22 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 writing at least 72 hours in advance of any such ac tivity and no nuisance results from such activity.

( 4 2 ) The provisions of paragraph (d)( paragraphs (C)(1) through (C)(1 4) shall not apply if the d ust control actions, as specified in Table 2, are i mplemented on a routine basis for each applicable fugitive dust source type . To qualify for this exemption, a person must :

(A) maintain (a) When high winds exceed 25 miles per hour, provi ded that:

(i) The required control measures for High Wind Con ditions are implemented for each applicable Fugitive Dust sourc e type, as specified in section (C)(10) through (C)(14);

(ii) Maintain daily

records to document the dates of active operations, all applicable fugit ive dust source types, and the specific actions taken consistent with Table 2 ;

(B) retain (iii) Maintain such records for a period of at least not less than six months; and

(C) make (iv) Make such records available to the Executive Officer APCO upon request.

( 5 b) To Unpaved Roads, provided such roads:

(i) Are used solely for the maintenance of wind-gen erating equipment;

or (ii) Meet all of the following criteria: a. Are less than 50 feet in width at all points alo ng the road; b. Are within 25 feet of the Property Line; and c. Have a traffic volume less than 20 vehicle-trips per day.

(c) To any Active Operation, Open Storage Pile, or Disturbed Surface Area for which necessary Fugitive Dust preventive or mit igative actions are in conflict with the federal Endangered Species Act.

(d) To Non-routine or emergency maintenance of floo d control channels and water spreading basins.

(4 ) The provisions of paragraph (d)(5) section (C)(3) shall not apply to earth coverings of public paved roadways Paved Roads where such coverings are approved by a local government agency for the protection of the r oadway, and where such coverings are used as roadway crossings for haul ve hicles.

( 6 5 ) The provisions of subdivision (f) section (D) shall not apply to:AVAQMD Rule 403 403-23

Fugitive Dust D3a, 02/24/10

( A) officially a) Officially -designated public parks and recreational areas, including national parks, national monuments, natio nal forests, state parks, state recreational areas, and county regional parks ;

( B) any construction and/or earth

- moving activity in which the completion date i s expected to be less than 60 days after the beginn ing date. To qualify for this exemption, a person must:

(i) notify the Executive Officer not more than 7 days a fter qualifying as a large operation or a medium operation under a contingency notification; (ii) include, as part of the notification, the items spe cified in subparagraphs (f)(3)(A) and (f)(3)(B); and (iii) take the actions specified in Tables 1 and 2 at suc h time as the construction and/or earth

- moving activities extend more than 60 days after q ualifying as a large operation or a medium operatio n under a contingency notification.

(C) any large operation or a medium operation under a c ontingency notification which is required to submit a dust con trol plan to any city or county government which ha s adopted a District

- approved dust control ordinance. To qualify for this exemption, a person must submit a copy of the city

- or county

- approved dust control plan to the Executive Officer within 30 days of the effective date of this rule o r within 30 days of receiving approval from the city or county governme nt, whichever is later.

(D) any large operation or a medium operation under a c ontingency notification subject to Rule 1158, which ha s an approved dust control plan pursuant to Rule 1158, provided tha t all sources of fugitive dust are included in the Rule 1158 plan.



### (i G ) Fees

(1) Any person subject to a plan Dust Control Plan submittal pursuant to subparagraph (f)(1)(B) or clause (h)(2)(A)(iii) or subparagraph (h)(1)(B) section (D) shall be assessed applicable filing and evaluation fees purs uant to Rule 306. Any person who simultaneously submits a plan pursuant to subpa ragraph (f)(1)(B) and clause (h)(2)(A)(iii) shall, for the purpose of this rule, be deemed to submit one plan.

(2) The submittal of an annual statement of no-chan ge, pursuant to paragraph (f)(9) section (D)(1)(i) , shall not be considered as an annual review, and therefore shall not be subject to annual review fees, pursuan t to Rule 306.403-24 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 (3) The owner/operator of any facility for which th e Ex ecutive Officer APCO conducts upwind/downwind monitoring for PM 10 pursuant to paragraph (d)(4 section (C)(2 ) shall be assessed applicable Ambient Air Analysis Fees pursuant to Rule 304.1. Applicable fees shall be waived for any facility which is exempted fr om paragraph (d)(4) or meets the requirements of pa ragraph (d)(4).

[SIP: Submitted as amended mm/dd/yy on mm/dd/yy; Submitted as amended 2/14/97 on 8/1/97; Submitted as amended 7/9/93 on 7/13/94; Ap proved 9/8/78, 43 FR 40011, 40 CFR 52.220(c)(39)(iii)(C); Approved 6/14/78, 43 F R 25684, 40 CFR 52.220(c)(32)(iv)(A)]

### TABLE 1

BEST [REASONABLY] * 

### AVAILABLE CONTROL MEASURES

FOR HIGH WIND CONDITIONS

AVAQMD Rule 403 403-25 Fugitive Dust D3a, 2/24/10 

### Appendix “A”

CONSTRUCTION SITE SIGNAGE GUIDELINES

(Minimum Requirements) The purpose of this signage is to allow the public to contact the responsible party if Visible Dust Emissions or Track-out of material is observed from a construction site.


### Fugitive Dust Source Category Project size 

### Control Measures ≥ Ten Acres

Earth

- moving (1A) Cease all active operations, OR (2A) Apply water to soil not more than 15 minutes prior to moving such soil. Disturbed surface

areas (0B) On the last day of active operations prior to a wee kend, holiday, or any other period when active operations will not occur for not more than four consecutive days: appl y water with a mixture of chemical stabilizer dilut ed to not less than 1/20 of the concentration required to maintain a st abilized surface for a period of six months; OR (1B) Apply chemical stabilizers prior to wind event, OR (2B) Apply water to all unstabilized disturbed areas 3 t imes per day. If the re is any evidence of wind driven fugitive dust, watering frequency is increased to a minimum of fou r times per day ; OR (3B) Take the actions specified in Table 2, Item (3c); O R (4B) Utilize any combination of control actions (1B), (2 B), and (3B) such that, in total, these actions apply to all disturb ed surface areas. Unpaved roads (1C) Apply chemical stabilizers prior to wind event, OR (2C) Apply water twice [once] per hour during active ope ration, OR (3C) Stop all vehicular traffic Open storage piles (1D) Apply water twice [once] per hour, OR (2D) Install temporary coverings Paved road track

- out (1E) Cover all haul vehicles; OR (2E) Comply with the vehicle freeboard requirements of S ection 23114 of the California Vehicle Code for both publi c and private roads. All Categories (1F) Any other control measures approved by the Executiv e Officer and the U.S. Environmental Protection Agenc y as equivalent to the methods specified in Table 1 may be used. *Measures in [brackets] are reasonable avail able control measures and only apply to sources not within the South Coast Air Basin.403-26 AVAQMD Rule 403 Fugitive Dust D3a, 02/24/10 

### Fugitive Dust Source Category Control Actions

Earth

- moving (except construction cutting and filling areas, and mining operations) (1a) Conduct watering as necessary to prevent visible emissions from extending more than 100 feet beyond the active cut or mining area unless the area is inaccessible to watering vehicles due to slope conditions or other safety factors. (1a

- 1) Apply dust suppression in sufficient quantit y and frequency to maintain a stabilized surface. Any ar eas which cannot be stabilized, as evidenced by wind driven fugitive dust must have an application of wa ter at least twice per day to at least 80 [70] percent of the unstabilized area (1b) Apply ch emical stabilizers within five working days of grading completion; OR (1c) Take actions (3a) or (3c) specified for inactive disturbed surface areas. Disturbed surface areas (except completed grading areas) (2a/b) Apply water to at least 80 [70 ] percent of all inactive disturbed surface areas on a daily basis when there is evidence of wind driven fugitive dust, excluding an y areas which are inaccessible to watering vehicles d ue to excessive slope or other safety conditions; OR Disturbed surface areas; Co mpleted grading areas (2c) Apply dust suppressants in sufficient quantity and frequency to maintain a stabilized surface; OR (2d) Establish a vegetative ground cover within 21 [30 ] days after active operations have ceased. Ground cover must be of suffic ient density to expose less than 30 percent of unstabilized ground within 90 days of planting, and at all times thereafter; OR Inactive disturbed surface

areas (3a) Utilize any combination of control actions (3a), (3 b), and (3c) such that, in total, these actions apply to all inactive disturbed surface areas. (3b) Apply dust suppressants in sufficient quantity and frequency to maintain a stabilized surface; OR (3c) Establish a vegetative ground cover within 21 [30 ] days after active operations have cea sed. Ground cover must be of sufficient density to expose less than 30 percent of unstabilized ground within 90 days of planting, and at all times thereafter; OR (3d) Utilize any combination of control actions (3a), (3 b), and (3c) such that, in total, t hese actions apply to all inactive disturbed surface areas. Unpaved Roads (4a) Water all roads used for any vehicular traffic at l eastAVAQMD Rule 403 403-27

Fugitive Dust D3a, 02/24/10 

### Fugitive Dust Source Category Control Actions once per every two hours of active operations [3 ti mes per normal 8 hour work day]; OR (4b) Water all roads used for a ny vehicular traffic once daily and restrict vehicle speeds to 15 miles per h our; OR (4c) Apply a chemical stabilizer to all unpaved road surfaces in sufficient quantity and frequency to maintain a stabilized surface. Open storage piles (5a) Apply chemi cal stabilizers; OR (5b) Apply water to at least 80 [70 ] percent of the surface area of all open storage piles on a daily basis whe n there is evidence of wind driven fugitive dust; OR (5c) Install temporary coverings; OR (5d) Install a three

- sided en closure with walls which extend, at a minimum, to the top of the pile. All Categories (6a) Any other control measures approved by the Executiv e Officer and the U.S. Environmental Protection Agenc y as equivalent to the methods specified in Table 2 m ay be u sed.

*Measures in [brackets] are reasonable available co ntrol measures and only apply to sources not within the South Coast Air Basin. CONTROL OPTIONS (1) Pave or apply chemical stabilization at sufficient concentration and frequency to maintain a stab ilized surface starting from the point of intersect ion with the public paved surface, and extending for a centerline distance of at least 100 feet and a width of at least 20 feet.

(2) Pave from the point of intersection with the public paved road surface , and extending for a centerline distance of at least 25 feet and a wid th of at least 20 feet, and install a track

out control device immediately adjacent to the pave d surface such that exiting vehicles do not travel on any unpaved road surface after pas si ng through the track

- out control device

(3) Any other control measures approved by the Executiv e Officer and the U.S. Environmental Protection Agency as equivalent to th e methods specified in Table 3 may be used.

Sign size 48” x 96”



### Sign TemplateA-28 AVAQMD Rule 403 Staff Report, D3 2/25/10 Permit # ( if applicable) 4” Site Name 4” Project Name / Tract # # # # 4” IF YOU SEE DUST COMING FROM THIS PROJECT CALL 4”

Name, Phone Number(XXX) XXX-XXXX 6” If you do not receive a response, Please call The Antelope Valley AQMD at 1-877-723-8070 3”

Notes:

Signage must be located within 50 feet of each proj ect site entrance. No more than four signs are required per site/facil ity. One sign is sufficient for multiple site entrances located within 300 yards of each other. Text height shall be at a minimum as shown on right side of sign template above. Sign background must contrast with lettering, typic ally black text with white background. Sign should be one inch AC laminated plywood board. The lower edge of the sign board must be a minimum of six feet and a maximum of seven feet above grade. The telephone number listed for the contact must be a local or a toll-free number and shall be accessible 24 hours per day.