(a) Owners and/or operators of storage tank systems shall ensure that releases due to spilling or overfilling do not occur. The owner and/or operator shall ensure that the volume available in the tank is greater than the volume of regulated substance to be transferred to the tank before the transfer is made. The owner and/or operator shall also ensure that the transfer operation is monitored constantly to prevent overfilling and spilling. The transfer procedures described in NFPA Standard 385 or API Recommended Practice 1007, both as defined in Section 2, may be used to comply with this paragraph.
(b) Owners and/or operators shall report, investigate, and clean up any spills and overfills in accordance with Section 22.
(c) Surface spills that occur at a storage tank facility during the transfer of a regulated substance to the tank are required to be reported and cleaned up by any person owning or having controlled the regulated substance pursuant to Section 22(a) and Chapter 4, Water Quality Rules and Regulations.
(d) Periodic Testing of Spill Prevention Equipment and Containment Sumps Used for Interstitial Monitoring of Piping and Periodic Inspection of Overfill Prevention Equipment. - (i) Owners and/or operators of tank systems with spill and overfill prevention equipment and containment sumps used for interstitial monitoring of piping shall meet the following requirements to ensure the equipment is operating properly and will prevent releases to the environment:
- (A) Spill prevention equipment (such as spill buckets or other spill containment device) and containment sumps used for interstitial monitoring of piping shall prevent releases by meeting one of the following:
- (I) The equipment is double-wall and the integrity of both walls is periodically monitored at a frequency not less than the frequency of the walkthrough inspections described in Section 13(d). Owners and/or operators shall begin meeting Section 10(i)(A)(II) and conduct a test within 30 days of discontinuing periodic monitoring of this equipment; or
- (II) The spill prevention equipment and containment sumps used for interstitial monitoring of piping are tested at least once every 3 years to ensure the equipment is liquid tight. If water is used, it may be reused for testing at other sites. However, when testing is complete, the water becomes a waste and must be evaluated to determine if it is a hazardous waste prior to proper disposal. Test water will be a hazardous waste if it exhibits any of the hazardous waste characteristics described in 40 CFR 261.21-24. Testing shall be conducted by vacuum, pressure, or liquid methods in accordance with:
- (1.) Requirements developed by the manufacturer (only if the manufacturer has developed such requirements); or
- (2.) A code of practice developed by a nationally recognized association or independent testing laboratory; or
- (3.) PEI RP1200 as referenced in Section 2; or
- (4.) Requirements determined by the department to be no less protective of health and the environment than other testing methods listed in Section 10(d)(i)(A)(II).
- (B) Overfill prevention equipment shall be inspected for functionality at least once every 3 years. At a minimum, the inspection shall ensure that overfill prevention equipment is set to activate at the correct level specified in Section 6(c) and will activate when regulated substance reaches that level. Inspections shall be conducted in accordance with one of the criteria in paragraph (d)(i)(A)(II) of this Section.
- (ii) Owners and/or operators shall begin meeting these requirements as follows:
- (A) For tank systems in use on or before October 13, 2015, the initial spill prevention equipment test, containment sump test and overfill prevention equipment inspection shall be conducted not later than October 13, 2018.
- (B) For tank systems brought into use after October 13, 2015, these requirements apply at installation.
- (iii) Owners and/or operators shall maintain records in accordance with Section 18 for spill prevention equipment, containment sumps used for interstitial monitoring of piping, and overfill prevention equipment as follows:
- (A) All records of testing or inspection shall be maintained for 3 years; and
- (B) For spill prevention equipment and containment sumps used for interstitial monitoring of piping not tested every 3 years, documentation showing that the prevention equipment is double-wall and integrity of both walls is periodically monitored shall be maintained for as long as the equipment is periodically monitored.
- (iv) Testing required under this Section shall be conducted by a licensed tester as defined in Section 48.
020-1 Wyo. Code R. § 1-10