[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: 40CFR280.42]



[Page 516-517]

 

                   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 D_Release Detection

 

Sec.  280.42  Requirements for hazardous substance UST systems.



    Owners and operators of hazardous substance UST systems must provide 

release detection that meets the following requirements:

    (a) Release detection at existing UST systems must meet the 

requirements for petroleum UST systems in Sec.  280.41. By December 22, 

1998, all existing hazardous substance UST systems must meet the release 

detection requirements for new systems in paragraph (b) of this section.

    (b) Release detection at new hazardous substance UST systems must 

meet the following requirements:

    (1) Secondary containment systems must be designed, constructed and 

installed to:

    (i) Contain regulated substances released from the tank system until 

they are detected and removed;

    (ii) Prevent the release of regulated substances to the environment 

at any time during the operational life of the UST system; and

    (iii) Be checked for evidence of a release at least every 30 days.

    Note. The provisions of 40 CFR 265.193, Containment and Detection of 

Releases, may be used to comply with these requirements.

    (2) Double-walled tanks must be designed, constructed, and installed 

to:

    (i) Contain a release from any portion of the inner tank within the 

outer wall; and

    (ii) Detect the failure of the inner wall.

    (3) External liners (including vaults) must be designed, 

constructed, and installed to:

    (i) Contain 100 percent of the capacity of the largest tank within 

its boundary;

    (ii) Prevent the interference of precipitation or ground-water 

intrusion with the ability to contain or detect a release of regulated 

substances; and

    (iii) Surround the tank completely (i.e., it is capable of 

preventing lateral as well as vertical migration of regulated 

substances).

    (4) Underground piping must be equipped with secondary containment 

that satisfies the requirements of paragraph (b)(1) of this section 

(e.g., trench liners, jacketing of double-walled pipe). In addition, 

underground piping that conveys regulated substances under pressure must 

be equipped with an automatic line leak detector in accordance with 

Sec.  280.44(a).

    (5) Other methods of release detection may be used if owners and 

operators:

    (i) Demonstrate to the implementing agency that an alternate method 

can detect a release of the stored substance as effectively as any of 

the methods allowed in Sec. Sec.  280.43(b) through (h) can detect a 

release of petroleum;



[[Page 517]]



    (ii) Provide information to the implementing agency on effective 

corrective action technologies, health risks, and chemical and physical 

properties of the stored substance, and the characteristics of the UST 

site; and,

    (iii) Obtain approval from the implementing agency to use the 

alternate release detection method before the installation and operation 

of the new UST system.