Wyoming Administrative Code › Agency 020 - Environmental Quality, Dept. of › Sub-Agency 0014 - Storage Tanks › Chapter 1 - STORAGE TANKS › Part C - GENERAL OPERATING REQUIREMENTS › Section 1-10 - Spill and Overfill Control

Current through July 13, 2024
(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).