Leaking Underground Storage Tank Priority Code Listing

Priority codes are used to describe the status, site conditions and general details about leaking underground storage tank cases. The values identify whether a case is open or closed and if it has impacted soil and/or groundwater.  For closed release cases (look for a “5” in the code), the values also indicate risk-based closure levels.

Priority Codes

1 — Known or probable effects on groundwater or affects soils to a depth within 30 feet of groundwater depth

1D — Defined soil and groundwater requires remediation (levels exceed standards for one or more media)

1DR — Remediation ongoing for defined soil and groundwater contamination

1DW — Defined soil, groundwater, surface water requires remediation (levels exceed standards for one or more media)

1F — Undefined release to groundwater with free product present on groundwater and/or surface water 

1M — Defined soil and groundwater or surface water; and levels for groundwater/surface water meet standards

1R  — Remediation ongoing for undefined soil and groundwater contamination

1W — Undefined with known/probable effect on groundwater/surface water, affects soil to depth within 30 feet of groundwater or 500 feet of surface water

2 — Undefined soil contamination (default for newly reported leaking underground storage tank)

2S — Suspected release, unknown whether or not soil contamination exists

3 — Defined soil requires remediation

3R — Remediation ongoing for defined soil contamination

3R3 — Defined soil proposing Tier 3

4R3 — Potential closure, defined soil levels meet Risk-Based Corrective Action (RBCA) Tier 3, unsatisfied administrative requirements

Closed Release Cases

5G1  — Soil/groundwater levels meet Risk-Based Corrective Action (RBCA) Tier 1

5G1D — Soil/groundwater levels meet Risk-Based Corrective Action (RBCA) Tier 1, recorded Declaration of Environmental Use Restriction (DEUR)

5G1V — Soil/groundwater levels meet Risk-Based Corrective Action (RBCA) Tier 1, recorded Voluntary Environmental Mitigation Use Restriction (VEMUR)

5G2 — Soil/groundwater levels meet Risk-Based Corrective Action (RBCA) Tier 2

5G3 —Soil/groundwater levels meet Risk-Based Corrective Action (RBCA) Tier 3

5G4 —Soil and groundwater contamination. Groundwater concentrations in excess of Aquifer Water Quality Standards (AWQS) have been determined to not be a risk under A.A.C. R18-12-263.04 ¹

5G4D — Soil and groundwater contamination. Groundwater concentrations in excess of Aquifer Water Quality Standards (AWQS) have been determined to not be a risk under A.A.C. R18-12-263.04. ¹ Declaration of Environmental Use Restriction (DEUR) recorded for soil contamination.

5R1 — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 1

5R1D — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 1, recorded Declaration of Environmental Use Restriction (DEUR)

5R1V — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 1, recorded Voluntary Environmental Mitigation Use Restriction (VEMUR)

5R2 — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 2

5R2D — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 2, recorded Declaration of Environmental Use Restriction (DEUR)

5R2V — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 2, recorded Voluntary Environmental Mitigation Use Restriction (VEMUR)

5R3 — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 3

5R3D — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 3, recorded Declaration of Environmental Use Restriction (DEUR)

5R3DI — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 3, recorded Declaration of Environmental Use Restriction (DEUR) with institutional control(s)

5R3V — Soil levels meet Risk-Based Corrective Action (RBCA) Tier 3, recorded Voluntary Environmental Mitigation Use Restriction (VEMUR)

5S — Case closed for a suspected release, due to false alarm, and there is no actual leak

Other/Miscellaneous

6 — Incident/tank was determined not to be underground storage tank jurisdiction and referred to another program

7 — Leaking underground storage tank case close-out involving a combination with other leaking underground storage tank(s) number/case at the same facility

8 — Soil gas sampling conducted by State Lead program closed out suspected release case.

9 — Closed due to being a duplicate leaking underground storage tank record