[Code of Federal Regulations]

[Title 40, Volume 26]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR280.70]



[Page 524-525]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 280_TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR 

OWNERS AND OPERATORS OF UNDERGROUND STORAGE TANKS (UST)--Table of Contents

 

            Subpart G_Out-of-Service UST Systems and Closure

 

Sec.  280.70  Temporary closure.





    (a) When an UST system is temporarily closed, owners and operators 

must continue operation and maintenance of corrosion protection in 

accordance with Sec.  280.31, and any release detection in accordance 

with subpart D. Subparts E and F must 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 (one 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 must also comply with the following requirements:

    (1) Leave vent lines 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 12 

months, owners and operators must permanently close the UST system if it 

does not meet either performance standards in Sec.  280.20 for new UST 

systems or the upgrading requirements in Sec.  280.21, except that the 

spill and overfill equipment requirements do not have to be met. Owners 

and operators must permanently close the substandard UST systems at the 

end of this 12-month period in accordance with Sec. Sec.  280.71-280.74, 

unless the implementing agency provides an extension of the 12-month 

temporary closure period. Owners and



[[Page 525]]



operators must complete a site assessment in accordance with Sec.  

280.72 before such an extension can be applied for.