Code of Maryland Regulations (Last Updated: April 6, 2021) |
Title 26. Department of Environment |
Part 2. |
Subtitle 10. OIL POLLUTION AND TANK MANAGEMENT |
Chapter 26.10.10. Out-of-Service UST Systems and Closure |
Sec. 26.10.10.01. Temporary Closure
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A. When an UST system is temporarily closed, owners and operators shall continue operation and maintenance of corrosion protection in accordance with COMAR 26.10.04.02, and any release detection method in accordance with COMAR 26.10.05. COMAR 26.10.08 and 26.10.09 shall be complied with if a release is suspected or confirmed. However, release detection is not required as long as the UST system is empty. The UST system is empty when all materials have been removed using commonly employed practices so that no more than 2.5 centimeters (approximately 1 inch) of residue, or 0.3 percent by weight of the total capacity of the UST system, remain in the system.
B. When an UST system is temporarily closed for 3 months or more, owners and operators shall also comply with the following requirements:
(1) Leave vent line open and functioning; and
(2) Cap and secure all other lines, pumps, manways, and ancillary equipment.
C. When an UST system is temporarily closed for more than 6 months, owners and operators shall permanently close the UST system if it does not meet either performance standards in COMAR 26.10.03.01 for new UST systems or the upgrading requirements in COMAR 26.10.03.08, except that the spill and overfill equipment requirements do not have to be met. Owners and operators shall permanently close the substandard UST systems at the end of this 6-month period in accordance with Regulations 02-----.05 of this chapter, unless the Department provides an extension of the 6-month temporary closure period. Owners and operators shall complete a site assessment in accordance with Regulation .03 of this chapter before an application for an extension can be made.
D. An UST system that has been temporarily closed for 1 year, and meets the performance standards in COMAR 26.10.03.01 or the upgrading requirements in COMAR 26.10.03.08, shall be permanently closed by the owner and operator in accordance with Regulations .02-----.05 of this chapter, unless the Department finds that reasonable factors exist to extend the 1-year closure period. The owner and operator shall complete a site assessment in accordance with Regulation .03 of this chapter before an application for an extension can be made.