35 Ill. Adm. Code 725.291
Assessment of Existing Tank System Integrity
Section 725
Section 725.291 Assessment
of Existing Tank System Integrity
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.