Arizona Administrative Code › Title 18 - ENVIRONMENTAL QUALITY › Chapter 2 - DEPARTMENT OF ENVIRONMENTAL - QUALITY AIR POLLUTION CONTROL › Article 6 - EMISSIONS FROM EXISTING AND NEW POINT SOURCES › Section R18-2-610 - Definitions for R18-2-610.01, R18-2-610.02, and R18-2-610.03

Current through Register Vol. 30, No. 28, July 12, 2024
The definitions in
				  R18-2-101
				  and the following definitions apply to
				  R18-2-610.01,
				  R18-2-610.02,
				  and
				  R18-2-610.03:
1. "Access restriction" means reducing PM
				emissions by reducing the number of trips driven on agricultural aprons and
				access roads by restricting or eliminating public access to noncropland or
				commercial farm roads with signs or physical obstruction at locations that
				effectively control access to the area.
2. "Aggregate cover" means reducing PM
				emissions and wind erosion and stabilizing soil by applying and maintaining
				gravel, concrete, recycled road base, caliche, or other similar material to
				noncropland or commercial farm roads. The aggregate should be clean, hard and
				durable, and should be applied and maintained to a depth sufficient to reduce
				PM emissions.
3. "Area A" means the
				area delineated according to A.R.S. §
									49-541(1).
4. "Best management practice" (BMP) means a
				technique verified by scientific research, that on a case-by-case basis is
				practical, economically feasible, and effective in reducing PM emissions from a
				regulated agricultural activity.
5.
				"Cessation of Night Tilling" means the discontinuation of tillage from sunset
				to sunrise on a day identified by the Maricopa or Pinal County Dust Control
				Forecast as being high risk of dust generation.
6. "Chemical irrigation" means reducing a
				minimum of one ground operation across a commercial farm by applying a
				fertilizer, pesticide, or other agricultural chemical to cropland through an
				irrigation system, which reduces soil disturbance and increases efficiency of
				application.
7. "Chips/ mulches"
				means reducing PM emissions and soil movement and preserving soil moisture by
				applying and maintaining nontoxic chemical or organic dust suppressants to a
				depth sufficient to reduce PM emissions. Materials shall meet all
				specifications required by federal, state, or local water agencies, and is not
				prohibited for use by any applicable regulations.
8. "Combining tractor operations" means
				reducing soil compaction and a minimum of one tillage or ground operation
				across a commercial farm by using a tractor, implement, harvester, or other
				farming support vehicle to perform two or more tillage, cultivation, planting,
				or harvesting operations at the same time. If Equipment modification is also
				chosen as a BMP, and uses the same practices as described in this BMP, this
				action is considered one BMP.
9.
				"Commercial farm" means 10 or more contiguous acres of land used for
				agricultural purposes within the boundary of the Maricopa PM nonattainment area
				and Maricopa County portion of Area A, a PM nonattainment area designated after
				June 1, 2009 as stated in A.R.S. §
									49-457(O)(1)(f),
				or the Pinal County PM Nonattainment Area.
10. "Commercial farm road" means a road that
				is unpaved, owned by a commercial farmer, and is used exclusively to service a
				commercial farm.
11. "Commercial
				farmer" means an individual, entity, or joint operation in general control of a
				commercial farm.
12. "Committee"
				means the Governor's Agricultural Best Management Practices Committee as
				established by A.R.S. §
									49-457.
13. "Conservation Tillage" means a tillage
				system that reduces a minimum of three tillage operations. This system reduces
				soil and water loss by planting into existing plant stubble on the field after
				harvest as well as managing the stubble so that it remains intact during the
				planting season.
14. "Cover crop"
				means establishing cover crops that maintain a minimum of 60 percent ground
				cover. Native or volunteer vegetation that meets the minimum ground cover
				requirement is acceptable. Compliance shall be determined by the Line Transect
				Test Method, NRCS National Agronomy Manual, Subpart 503.51, Estimating Crop
				Residue Cover, amended through February 2011 (and no future
				editions).
15. "Critical area
				planting" means reducing PM10 emissions and wind erosion
				by planting trees, shrubs, vines, grasses, or other vegetative cover on
				noncropland in order to maintain at least 60 percent ground cover. Compliance
				shall be determined by the Line Transect Test Method, NRCS National Agronomy
				Manual, Subpart 503.51, Estimating Crop Residue Cover, amended through February
				2011 (and no future editions).
16.
				"Cropland" means land on a commercial farm that:
a. Is within the time-frame of final harvest
				to plant emergence, but does not include tillage activities;
b. Has been tilled in a prior year and is
				suitable for crop production, but is currently fallow; or
c. Is a turn-row.