a) For each existing tank system that does
not have secondary containment meeting the requirements of Section
725.293,
the owner or operator must determine either that the tank system is not leaking
or that it is unfit for use. Except as provided in subsection (c), the owner or
operator must obtain and keep on file at the facility a written assessment
reviewed and certified by a qualified Professional Engineer, in accordance with
35 Ill. Adm. Code
702.126(d),
that attests to the tank system's integrity.
b) This assessment must determine whether the
tank system is adequately designed and has sufficient structural strength and
compatibility with the wastes to be stored or treated to ensure that it will
not collapse, rupture, or fail. At a minimum, this assessment must consider the
following:
1) Design standards, if available,
according to which the tank and ancillary equipment were constructed;
2) Hazardous characteristics of the wastes
that have been or will be handled;
3) Existing corrosion protection
measures;
4) Documented age of the
tank system, if available, (otherwise, an estimate of the age); and
5) Results of a leak test, internal
inspection, or other tank integrity examination, such that the following
conditions are met:
A) For non-enterable
underground tanks, this assessment must consist of a leak test that is capable
of taking into account the effects of temperature variations, tank end
deflection, vapor pocket, and high water table effects.
B) For other than non-enterable underground
tanks and for ancillary equipment, this assessment must be either a leak test,
as described above, or an internal inspection or other tank integrity
examination certified by a qualified Professional Engineer, in accordance with
35 Ill. Adm. Code
702.126(d),
that addresses cracks, leaks, corrosion, and erosion.
BOARD NOTE: The practices described in the American Petroleum
Institute (API) Publication, "Guide for Inspection of Refinery Equipment",
Chapter XIII, "Atmospheric and Low-Pressure Storage Tanks", incorporated by
reference in 35 Ill. Adm. Code
720.111(a),
may be used, where applicable, as guidelines in conducting the integrity
examination of an other than non-enterable underground tank
system.
c) Tank systems that store or treat materials
that become hazardous wastes must conduct this assessment within 12 months
after the date that the waste becomes a hazardous waste.
d) If, as a result of the assessment
conducted in accordance with subsection (a), a tank system is found to be
leaking or unfit for use, the owner or operator must comply with the
requirements of Sections
725.296.