020-17 Wyo. Code R. § 17-20

Current through April 27, 2019

Section 17-20 - Release Investigation and Confirmation for Eligible Owners and/or Operators

Owners and/or operators of storage tanks who are 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 storage tank system that routinely contains a regulated substance. Owners and/or operators of all storage tanks shall also audit one year's inventory control required by Section 16(a) or 36(e).

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

• (ii) 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, then the department will accomplish the site check as described in Section 20(c).

• (iii) Further investigation is not required if the test results for the system, tank, delivery piping and the audit do not indicate that a leak exists and if environmental contamination is not the basis for suspecting a release.

(b) Further Action. If the test results required under Section 20(a) do not indicate a release, but environmental contamination is the basis for suspecting a release, the department will accomplish the site check as required under Section 20(c) and all other required Part E activities, as determined by the administrator.

(c) Site check. The department shall test for the presence of a release where contamination is most likely to be present at the storage tank site. In selecting sample types, sample locations, and measurement methods, the department shall consider the nature of the stored regulated substance, the type of initial alarm or cause for suspicion, the type of backfill, the depth of groundwater, and other factors appropriate for identifying the presence and source of the release. If the test results for the site check do not indicate that a release has occurred, further investigation is not required.

(d) Plans and Specifications, All plans, specifications and reports filed under this section with the department shall also be signed and sealed by a Registered Professional Engineer under 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.

020-17 Wyo. Code R. § 17-20