[Code of Federal Regulations]
[Title 40, Volume 26]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR280.41]

[Page 512]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 280_TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR OWNERS AND 
 
                       Subpart D_Release Detection
 
Sec. 280.41  Requirements for petroleum UST systems.

    Owners and operators of petroleum UST systems must provide release 
detection for tanks and piping as follows:
    (a) Tanks. Tanks must be monitored at least every 30 days for 
releases using one of the methods listed in Sec. 280.43 (d) through (h) 
except that:
    (1) UST systems that meet the performance standards in Sec. 280.20 
or Sec. 280.21, and the monthly inventory control requirements in Sec. 
280.43 (a) or (b), may use tank tightness testing (conducted in 
accordance with Sec. 280.43(c)) at least every 5 years until December 
22, 1998, or until 10 years after the tank is installed or upgraded 
under Sec. 280.21(b), whichever is later;
    (2) UST systems that do not meet the performance standards in Sec. 
280.20 or Sec. 280.21 may use monthly inventory controls (conducted in 
accordance with Sec. 280.43(a) or (b)) and annual tank tightness 
testing (conducted in accordance with Sec. 280.43(c)) until December 
22, 1998 when the tank must be upgraded under Sec. 280.21 or 
permanently closed under Sec. 280.71; and
    (3) Tanks with capacity of 550 gallons or less may use weekly tank 
gauging (conducted in accordance with Sec. 280.43(b)).
    (b) Piping. Underground piping that routinely contains regulated 
substances must be monitored for releases in a manner that meets one of 
the following requirements:
    (1) Pressurized piping. Underground piping that conveys regulated 
substances under pressure must:
    (i) Be equipped with an automatic line leak detector conducted in 
accordance with Sec. 280.44(a); and
    (ii) Have an annual line tightness test conducted in accordance with 
Sec. 280.44(b) or have monthly monitoring conducted in accordance with 
Sec. 280.44(c).
    (2) Suction piping. Underground piping that conveys regulated 
substances under suction must either have a line tightness test 
conducted at least every 3 years and in accordance with Sec. 280.44(b), 
or use a monthly monitoring method conduct in accordance with Sec. 
280.44(c). No release detection is required for suction piping that is 
designed and constructed to meet the following standards:
    (i) The below-grade piping operates at less than atmospheric 
pressure;
    (ii) The below-grade piping is sloped so that the contents of the 
pipe will drain back into the storage tank if the suction is released;
    (iii) Only one check valve is included in each suction line;
    (iv) The check valve is located directly below and as close as 
practical to the suction pump; and
    (v) A method is provided that allows compliance with paragraphs 
(b)(2) (ii)-(iv) of this section to be readily determined.