Statutes, codes, and regulations
Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. ofSubagency 0011 - Water QualityChapter 17 - STORAGE TANKS
Part G - STORAGE TANK SYSTEMS: OUT-OF-SERVICE SYSTEMS AND CLOSURES
Section 17-31 - Permanent Closure and Changes In Service

020-17 Wyo. Code R. § 17-31

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Current through April 27, 2019
Section 17-31 - Permanent Closure and Changes In Service

(a) Notification. At least thirty (30) days before beginning either permanent closure or changing a storage tank system to a non-regulated use under Section 31(b) or (c), owners and/or operators shall notify the department of their intent, unless such action is in response to corrective action. The required permanent site closure or Minimum Site Assessment of the excavation zone under Section 29 shall be performed after notifying the department but before completion of the permanent closure or changing a storage tank system to a non-regulated use.

(b) Permanent Closure. To permanently close a storage tank system, owners and/or operators shall empty and clean it by removing all liquids and accumulated sludges and performing a Minimum Site Assessment as defined in Section 29. All USTs taken out of service permanently shall also be removed from the ground or filled with an inert solid material. The tank cleaning and closure procedures shall be properly conducted in accordance with one of the following industry standards or practices:

  • (i) API Recommended Practice 1604, "Removal and Disposal of Used Underground Petroleum Storage Tanks";
  • (ii) API Publication 2015, "Cleaning Petroleum Storage Tanks";
  • (iii) API Recommended Practice 1631, "Interior Lining of USTs";
  • (iv) The National Institute for Occupational Safety and Health "Criteria for a Recommended Standard *** Working in Confined Space"; and,
  • (v) Section 33 provides a process for evaluating and permitting designs or procedures which deviate from recognized industry standards or practices.

(c) Change of Service. Before converting any regulated storage tank to store a non-regulated substance, owners and/or operators shall empty and clean the tank by removing all liquid and accumulated sludge in accordance with Section 31(b)(i) through (v) unless the non-regulated substance happens to be the same as the regulated substance. Before converting any regulated storage tank to store a non-regulated substance, owners and/or operators shall conduct a Minimum Site Assessment in accordance with Section 29.

(d) Records. Results of the Minimum Site Assessments required under this section shall be submitted to the department within ninety (90) days of completion.

020-17 Wyo. Code R. § 17-31