6USEPA. Revising underground storage tank regulations-revisions to existing requirements and new requirements for secondary containment and operator training[S]. Washingtor DC:USEPA, EPA-HQ-UST-2011-0301, 2015.
7USEPA. EPA study on the effectiveness of UST insurance as a financial responsibility (FR) mechanism[R]. Washingtor DC:USEPA, Office of Underground Storage Tanks, EPA-510-R- 11-005, 2011:5-7.
8USEPA. The national LUST cleanup backlog: a study of opportunities[R]. Washingtor DC:USEPA, Office of Underground Storage Tanks, 2011:3-4.
9USEPA. FY 2011 annual report on the underground storage tank program[R]. Washingtor DC:USEPA, O~ce of Underground Storage Tanks, 2011.
10Moran M J, Lapham W W, Rowe B L, et al. Occurrence and status of volatile organic compounds in ground water from rural, untreated, self- supplied domestic wells in the United State[R]. Water-Resources Investigations Report, 2002:4085.
