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Annual Overfill Prevention Equipment Operability Check UST22A (for components installed on or after 11×1/2007 or when returning any MUST system to service from temporary closure) This form must be
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UST-21 is a form used to report information on underground storage tanks.
Owners and operators of underground storage tanks are required to file UST-21.
UST-21 can be filled out online or submitted via mail with the required information on underground storage tanks.
The purpose of UST-21 is to ensure that information on underground storage tanks is accurately reported to regulatory authorities.
Information such as tank location, size, contents, leak detection methods, and compliance with regulations must be reported on UST-21.
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