Arizona Administrative Code › Title 18 - ENVIRONMENTAL QUALITY › Chapter 7 - DEPARTMENT OF ENVIRONMENTAL QUALITY - REMEDIAL ACTION › Article 2 - SOIL REMEDIATION STANDARDS › Section R18-7-201 - Definitions

Current through Register Vol. 30, No. 28, July 12, 2024
In addition to the definitions provided in A.R.S.
				  §§
									49-151 and
				  49-152,
				  the following definitions apply in this Article:
1. "Aquifer Protection Permit Program" means the system of
				  requirements prescribed in A.R.S. Title 49, Chapter 2, Article 3 and A.A.C.
				  Title 18, Chapter 9, Articles 1 through 7.
2. "Background" means a concentration of a naturally
				  occurring contaminant in soils.
3. "Carcinogen" or "carcinogenic" means the potential of a
				  contaminant to cause cancer in humans as determined by lines of evidence in
				  accordance with a narrative classification in "Guidelines for Carcinogen Risk
				  Assessment", EPA/630/P-03/001F, March 2005, (and no future editions), which is
				  incorporated by reference. "Guidelines for Carcinogen Risk Assessment" is
				  available from ADEQ and at
				  http://cfpub.epa.gov/ncea/raf/recordisplay.cfm?deid=116283.
4. "Child care facility" means any permanent facility on a
				  property or portion of property in which care or supervision is provided for
				  children below the age of 18, unaccompanied by a parent or guardian, for
				  periods of less than 24 hours per day. Child care facility does not include
				  private homes or facilities that care for fewer than five children.
5. "Contact" means exposure to a contaminant through
				  ingestion, inhalation, or dermal absorption.
6. "Contaminant" means a substance regulated by the programs
				  listed in
				  R18-7-202(A)
				  or
				  R18-7-202(B)
				  or defined in A.R.S. §
									49-171(2).
7. "Department" means the Arizona Department of Environmental
				  Quality.
8. "Deterministic risk assessment methodology" means a
				  site-specific human health risk assessment, performed using a specific set of
				  input variables, exposure assumptions, and toxicity criteria, represented by
				  point estimates for each receptor evaluated, which results in a point estimate
				  of risk.
9. "Declaration of Environmental Use Restriction" or "DEUR"
				  means a restrictive covenant as described in A.R.S. §
									49-152.
10. "Ecological community" means an assemblage of populations
				  of different species within a specified location in space and time.
11. "Ecological receptor" means a specific ecological
				  community, population, or individual organism, protected by federal or state
				  laws and regulations, or a local population that provides an important natural
				  or economic resource, function, and value.
12. "Ecological risk assessment" means a scientific
				  evaluation of the probability of an adverse effect to ecological receptors from
				  exposure to specific types and concentrations of contaminants. An ecological
				  risk assessment contains four components: identification of potential
				  contaminants; an exposure assessment; a toxicity assessment; and a risk
				  characterization.
13. "Engineering control" means a remediation method, such as
				  a barrier or cap, which is used to prevent or minimize exposure to
				  contaminants, and includes technologies that reduce the mobility or migration
				  of contaminants.
14. "Excess lifetime cancer risk" means the increased risk of
				  developing cancer above the background cancer occurrence levels due to exposure
				  to contaminants.
15. "Exposure" means contact between contaminants and
				  organisms.
16. "Exposure pathway" means the course a contaminant takes
				  from a source to an exposed organism. Each exposure pathway includes a source
				  or release from a source, an exposure point, and an exposure route. If the
				  exposure point differs from the source, transport/exposure media (that is, air,
				  water) are also included.
17. "Exposure point" means a location of potential contact
				  between a contaminant and an organism.
18. "Exposure route" means the way a contaminant comes into
				  contact with an organism (that is, by ingestion, inhalation, or dermal
				  contact).
19. "Groundwater" means water in an aquifer as defined in
				  A.R.S. §
									49-201(2).
20. "Hazard Index" means the sum of hazard quotients for
				  multiple substances and/or multiple exposure pathways, or the sum of hazard
				  quotients for chemicals acting by a similar mechanism and/or having the same
				  target organ.
21. "Hazardous Waste Management Program" means the system of
				  requirements prescribed in A.R.S. Title 49, Ch. 5, Article 2 and 18 A.A.C. 8,
				  Article 2.
22. "Hazard quotient" means the value which quantifies
				  non-carcinogenic risk for one chemical for one receptor population for one
				  exposure pathway over a specified exposure period. The hazard quotient is equal
				  to the ratio of a chemical-specific intake to the reference dose.
23. "Imminent and substantial endangerment to the public
				  health or the environment" has the meaning found in A.R.S. §
									49-282.02(C)(1).
24. "Institutional control" means a legal or administrative
				  tool or action taken to reduce the potential for exposure to
				  contaminants.
25. "Letter of Completion" means a Departmental statement
				  that indicates whether the property in question has met the soil remediation
				  standards in this Article.
26. "Migrate" or "migration" means the movement of
				  contaminants from the point of release, emission, discharge, or spillage:
				  through the soil profile; by volatilization from soil to air and subsequent
				  dispersion to air; and by water, wind, or other mechanisms.
27. "Non-carcinogen" means a contaminant that has the
				  potential upon exposure to an individual to cause adverse health effects other
				  than cancer.
28. "Non-residential site-specific remediation level" means a
				  level of contaminants remaining in soil after remediation that results in a
				  cumulative excess lifetime cancer risk between 1 x
				  10
-6
and 1 x
				  10
-4
and a Hazard Index no greater
				  than 1 based on non-residential exposure assumptions.
29. "Nuisance" means the activities or conditions that may be
				  subject to A.R.S. §
									49-141.
30. "Person" means any public or private corporation,
				  company, partnership, firm, association, or society of persons, the federal
				  government and any of its departments or agencies, this state or any of its
				  agencies, departments, political subdivisions, counties, towns, municipal
				  corporations, as well as a natural person.
31. "Population" means an aggregate of individuals of a
				  species within a specified location in space and time.
32. "Probabilistic risk assessment methodology" means a
				  site-specific human health risk assessment, performed using probability
				  distributions of input variables and exposure assumptions that take into
				  account the variability and uncertainty of these values, which results in a
				  range or distribution of possible risk estimates.
33. "Reasonable Maximum Exposure" or "RME" means the highest
				  human exposure case that is greater than the average, but is still within the
				  range of possible exposures to humans at a site.
34. "Remediate" or "remediation" has the meaning found in
				  A.R.S. §
									49-151.
35. "Reference dose" means the toxicity factor expressed as a
				  threshold level in units of (mg/kg-day) at which non-cancer effects are not
				  expected to occur.
36. "Repository" means the Department's database, established
				  under A.R.S. §
									49-152(E),
				  from which the public may view information pertaining to remediation
				  projects.
37. "Residential site-specific remediation level" means a
				  level of contaminants remaining in the soil after remediation that results in a
				  cumulative excess lifetime cancer risk between 1 x
				  10
-6
and 1 x
				  10
-4
and a Hazard Index no greater
				  than 1 based on residential exposure assumptions.
38. "Residential use" has the meaning found in A.R.S. §
									49-151.
39. "School" means any public institution under the
				  jurisdiction of the Arizona State Board of Education or the Arizona State Board
				  for Charter Schools, or any non-public institution, established for the
				  purposes of offering instruction to children attending any grade from preschool
				  through grade 12.
40. "Site-specific human health risk assessment" means a
				  scientific evaluation of the probability of an adverse effect to human health
				  from exposure to specific types and concentrations of contaminants. A
				  site-specific human health risk assessment contains four components:
				  identification of potential contaminants; an exposure assessment; a toxicity
				  assessment; and a risk characterization.
41. "Soil" means all earthen materials, including moisture
				  and pore space contained within earthen material, located between the land
				  surface and groundwater including sediments and unconsolidated accumulations
				  produced by the physical and chemical disintegration of rocks.
42. "Soil remediation level" or "SRL" means a pre-determined
				  risk-based standard based upon the total contaminant concentration in soil,
				  developed pursuant to A.R.S. §
									49-152(A)(1)
				   and listed in Appendix A or, as applicable,
				  in Appendix B.
43. "Solid Waste Management Program" means the system of
				  requirements prescribed in A.R.S. Title 49, Ch. 4, and the rules adopted under
				  those statutes.
44. "Special Waste Management Program" means the system of
				  requirements prescribed in A.R.S. Title 49, Ch. 4, Article 9 and 18 A.A.C. 13,
				  Articles 13 and 16.
45. "Underground Storage Tank Program" or "UST Program" means
				  the system of requirements prescribed in A.R.S. Title 49, Ch. 6, Article 1 and
				  18 A.A.C. 12.
46. "Water Quality Assurance Revolving Fund" or "WQARF" means
				  the system of requirements prescribed in A.R.S. Title 49, Ch. 2, Article 5 and
				  18 A.A.C. 16.