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Chapter 173–360 WAC - Underground Storage Tank

Ecology's Toxics Cleanup Program is proposing a new Chapter to re-organize, revise, and add additional subject matter to the current Underground Storage Tank ("UST') rule, WAC 173-360. The purpose of the UST rule is to prevent or reduce leaks of petroleum and other hazardous substances from UST systems. Revisions are needed to comply with the federal Energy Policy Act of 2005 and the 2007 amendments to the state UST law (Chapter 90.76 RCW). Ecology would also like to improve the clarity and readability, of the rule. To this end, we are proposing a new chapter incorporating much of the current UST rule, along with some changes and additions. Ecology would then issue a repeal of the current rule at a later date. Some of the changes being considered include:

• A mandatory UST owner and operator training program
• Requirements for secondary containment systems on new tanks, piping, and dispensers
• Procedures to implement a delivery prohibition enforcement option (a "red tag" program)
• Increased annual fees (as specified in the enabling state statute)
• Changes to improve the organization and readability of the rule
• • Changes in standards for equipment, maintenance, and inspection to reduce the likelihood of leaks and spills

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