A. A baseline period of seven years after January 1, 2016 is established for underground storage tanks.  Beginning January 1, 2016, during the baseline period, an owner, operator or person who meets the requirements of section 49-1016, subsection C may do the following:

Terms Used In Arizona Laws 49-1052

  • Baseline: Projection of the receipts, outlays, and other budget amounts that would ensue in the future without any change in existing policy. Baseline projections are used to gauge the extent to which proposed legislation, if enacted into law, would alter current spending and revenue levels.
  • Corrective actions: means those actions that are prescribed pursuant to section 49-1005. See Arizona Laws 49-1001
  • 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
  • Property: includes both real and personal property. See Arizona Laws 1-215
  • 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

1. Elect to conduct a baseline assessment pursuant to this section.

2. Request monies to cover costs associated with the baseline assessment pursuant to section 49-1071.

3. Request the department to perform the baseline assessment under section 49-1017.02.

B. The department shall establish standards for conducting baseline assessments pursuant to this section. Until the department establishes standards by rule or by guidance documents, baseline assessment work plans shall be submitted to the department for approval and shall be considered for preapproval on a case-by-case basis, based on compliance with subsection D of this section.

C. Baseline assessments shall be conducted under the direction of a person who is a professional engineer or a registered geologist who is registered under title 32, chapter 1 or a remediation specialist.

D. The scope of the baseline assessment shall address likely release areas and shall include a collection of sufficient information to allow for a determination of the current environmental condition of the property.  Samples shall be collected in areas where contamination is most likely to have occurred and sample locations shall consider site-specific conditions, location of potential receptors and preexisting contamination.  The baseline assessment must include the registered or certified professional’s interpretation regarding confirmation of an unknown release and evaluation of potential risk for the purpose of prioritizing corrective actions.

E. If unknown contamination is identified in the baseline assessment, all of the following apply:

1. The owner, operator or person that meets the requirements of section 49-1016, subsection C shall comply with the reporting requirements pursuant to section 49-1004 and shall initiate corrective actions pursuant to section 49-1005.

2. Unless documentation is provided to the department that demonstrates that the operating underground storage tank is not the source of the release, the department shall require tightness testing.

3. If continued operation of the underground storage tank may result in a continued release, the department may initiate delivery prohibition as prescribed in section 49-1023.