Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 17 - STORAGE TANKS
Part E - STORAGE TANK SYSTEMS: RELEASE REPORTING, INVESTIGATION, CONFIRMATION AND RESPONSE
Section 17-21 - Release Investigation and Confirmation for Owners and/or Operators Not Eligible for the Corrective Action Account

Universal Citation: WY Code of Rules 17-21

Current through September 21, 2024

Owners of contaminated sites and Owners and/or Operators of storage tanks may become ineligible for cleanup under the Corrective Action Account for any of the reasons listed in W.S. 35-11-1424. Owners and/or Operators who are not eligible for cleanup under the Corrective Action Account shall immediately investigate and confirm all suspected releases of regulated substances requiring reporting under Section 19 within seven (7) days of detection as follows:

(a) System test. Owners and/or operators shall conduct tests, according to the requirements for tightness testing in Section 14(g) and Section 16(b), that determine whether a leak exists in that portion of the tank that routinely contains regulated substance, or the connected piping, or both. Storage tank Owners and/or operators shall also audit all inventory control required under Sections 16(a) or 36(e) for the year prior to the suspected release.

(i) Owners and/or operators shall repair, replace, or permanently close the storage tank system if the test results for the system indicate that a leak exists.

(ii) When environmental contamination is the basis for suspecting a release, owners and/or operators shall also conduct a thorough audit of all of their leak detection methods for the preceding year. This audit shall be performed by a qualified third party, employed for this purpose by the owner and/or operator. In the event that the audit indicates a pattern of releases over several months, owners and/or operators shall conduct a site check as described in Section 20(c).

(iii) Owners and/or operators shall conduct a minimum site assessment as described in Section 29 any time that the results of the system test described in Section 21(a) indicate that a leak exists, or if environmental contamination is the basis for suspecting a release.

(b) Further Action. Further investigation is not required if the system test results required under Section 21(a) do not indicate that a leak exists and if environmental contamination is not the basis for suspecting a release. If the test results for the excavation zone at an UST site or the results for the area immediately adjacent to the storage tank system at an above ground storage tank site indicate that a release has occurred, owners and/or operators shall begin corrective action in accordance with Part E;

(c) Permits Required. Owners of contaminated sites and/or owners and/or operators of storage tank systems shall also ensure that all necessary department permits for groundwater monitoring or product recovery wells have been issued prior to initiating site check activities.

(d) Plans and Specifications. All plans, specifications and reports filed this section with the department shall also be signed and sealed by a Registered Professional Engineer under W.S. W.S. 33-29-114 through 33-29-149 and/or a Registered Professional Geologist under W.S. W.S. W.S. 33-41-101 through 33-41-121, as applicable.

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