Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.56 - UNDERGROUND STORAGE TANKS PETROLEUM AND CHEMICAL SUBSTANCES
Subchapter 17.56.5 - Release Reporting, Investigation, and Confirmation
Rule 17.56.506 - REPORTING OF CONFIRMED RELEASES
Universal Citation: MT Admin Rules 17.56.506
Current through Register Vol. 6, March 22, 2024
(1) Upon confirmation of a release in accordance with ARM 17.56.504, or after a release from the PST or UST system is identified in any other manner, owners and operators, any person who installs or removes an UST, or who performs subsurface investigations for the presence of regulated substances, and any person who performs a tank tightness or line tightness test pursuant to ARM 17.56.407 or 17.56.408, must report releases to the department within the specified timeframes and in the following manner:
(a) Except as provided in (1)(b), all
confirmed releases must be reported to a person within the department or to the
24-hour Disaster and Emergency Services duty officer available at (406)
324-4777 within 24 hours of confirming the release. Messages left on answering
machines, received by facsimile, e-mail, voice mail, or other messaging device
are not adequate 24-hour notice. For further assistance, the department's
release reporting hotline may be reached at 1 (800) 457-0568.
(b) When a release is confirmed from
laboratory analysis of samples collected from a site, the release must be
reported to the department by a method that ensures the department receives the
information within seven days of release confirmation. The date of release
confirmation, for purposes of this rule, is the date the owner, operator,
installer, remover, or person who performs subsurface investigations for the
presence of regulated substances received notification of the sample results
from the laboratory. Laboratory analytical results that exceed the following
values confirm that a release has occurred:
(i) risk-based screening levels (RBSLs)
established for petroleum contaminants in surface soil at UST sites, published
in the first numeric column of the Tier 1 Surface Soil RBSL Table (Table 1) of
Montana Risk-based Corrective Action Guidance for Petroleum Releases (RBCA) for
petroleum compounds and mixtures in surface and subsurface soil;
(ii) regional screening levels published in
the United States Environmental Protection Agency, Regional Screening Level
(RSL) Table for contaminants in soil that are not listed in RBCA; or
(iii) contaminant levels in water that exceed
background levels in the receiving water.
AUTH: 75-11-319, 75-11-505, MCA; IMP: 75-11-309, 75-11-505, MCA
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