A. When a release is discovered the owner and operator of an underground storage tank shall take immediate action to stop the release and to identify and mitigate any fire, explosion or vapor hazard.

Terms Used In Arizona Laws 49-1005

  • Action: includes any matter or proceeding in a court, civil or criminal. See Arizona Laws 1-215
  • Corrective actions: means those actions that are prescribed pursuant to section 49-1005. See Arizona Laws 49-1001
  • Director: means the director of environmental quality who is also the director of the department. See
  • including: means not limited to and is not a term of exclusion. See Arizona Laws 1-215
  • Operator: means a person in control of, or having responsibility for, the day-to-day operation of an underground storage tank. See Arizona Laws 49-1001
  • Person: means an individual, trust, firm, joint stock company, corporation, joint venture, partnership, association, consortium, state, municipality, interstate body, commission, political subdivision of a state and the United States government. See Arizona Laws 49-1001
  • Regulated substance: means :

    (a) Petroleum. See Arizona Laws 49-1001

  • Release: means a spill, leak, emission, discharge, escape, leach or disposal of a regulated substance from an underground storage tank into groundwater, surface water or soils. See Arizona Laws 49-1001
  • Tank: means a stationary device constructed of wood, concrete, steel, plastic or other nonearthen materials and used to contain regulated substances. See Arizona Laws 49-1001
  • Underground storage tank: means a tank or combination of tanks and underground pipes and impact valves connected to tanks being used or having been used to contain regulated substances and which has at least ten percent of the total volume of the tank and underground portions of pipes connected to the tank underground. See Arizona Laws 49-1001

B. The owner or operator of an underground storage tank shall take corrective action in response to the release of regulated substances from the tank, except to the extent that this responsibility is limited by section 49-1016, subsection F or section 49-1019, subsection D.  A person may take corrective action pursuant to section 49-1016, subsection C.

C. Nothing in this section prevents the director from taking or requiring corrective action pursuant to any other provision of law.

D. Corrective actions shall:

1. Assure the protection of public health and welfare and the environment.

2. To the extent practicable, provide for the control, management or cleanup of regulated substances so as to allow the maximum beneficial use of the water and soil of this state.

3. Be reasonable, necessary, cost-effective and technically feasible.

E. Notwithstanding chapter 2, article 2 of this title, the director may approve a corrective action that may result in water quality exceeding water quality standards after completion of the corrective action, if the director finds that the corrective action meets the requirements of this section. The director’s approval pursuant to this section does not affect the classification of an aquifer pursuant to section 49-224. The director shall adopt rules to implement this section.  These rules shall include public notice provisions, criteria for the selection of corrective actions, including the level and extent of cleanup and the comparison of corrective action alternatives that may include plume remediation alternatives, monitoring, source control, controlled migration, physical containment and natural attenuation.

F. The director shall prescribe by rule the corrective actions to be taken in the event of a release of a regulated substance from an underground storage tank. Any rules adopted pursuant to this subsection shall be consistent with and no more stringent than federal regulations in effect on the date on which the rules are adopted.  The director shall adopt rules to permit a risk-based corrective action alternative. Corrective actions shall include requirements regarding:

1. Initial response measures.

2. Initial abatement measures.

3. A site check.

4. Initial site characterization.

5. Removal of free product.

6. Investigations for soil, surface water and groundwater cleanups.

7. Responses to contaminated soil, surface water and groundwater.

G. Corrective actions may include the use of biostimulation with indigenous microbes and bioaugmentation using microbes that are nonpathogenic, that are nonopportunistic and that are naturally occurring.

H. Until rules adopted pursuant to subsection F of this section are in effect, corrective actions shall be accomplished in a manner consistent with and no more stringent than 40 Code of Federal Regulations sections 280.60 through 280.67.