a) An owner or operator of a new tank system
or component must ensure that the foundation, structural support, seams,
connections, and pressure controls (if applicable) are adequately designed and
that the tank system has sufficient structural strength, compatibility with the
wastes to be stored or treated, and corrosion protection so that it will not
collapse, rupture, or fail. The owner or operator must obtain a written
assessment reviewed and certified by a qualified Professional Engineer, in
accordance with 35 Ill. Adm. Code
702.126(d),
attesting that the system has sufficient structural integrity and is acceptable
for the storing and treating of hazardous waste. This assessment must include
the following information:
1) Design
standards according to which the tanks and ancillary equipment is or will be
constructed.
2) Hazardous
characteristics of the wastes to be handled.
3) For new tank systems or components in
which the external shell of a metal tank or any external metal component of the
tank system is or will be in contact with the soil or with water, a
determination by a corrosion expert of the following:
A) Factors affecting the potential for
corrosion, including but not limited to the following:
i) Soil moisture content;
ii) Soil pH;
iii) Soil sulfides level;
iv) Soil resistivity;
v) Structure to soil potential;
vi) Influence of nearby underground metal
structures (e.g., piping);
vii)
Stray electric current;
viii)
Existing corrosion-protection measures (e.g., coating, cathodic protection,
etc.); and
B) The type
and degree of external corrosion protection that are needed to ensure the
integrity of the tank system during the use of the tank system or component,
consisting of one or more of the following:
i) Corrosion-resistant materials of
construction such as special alloys, or fiberglass-reinforced
plastic;
ii) Corrosion-resistant
coating (such as epoxy, fiberglass, etc.) with cathodic protection (e.g.,
impressed current or sacrificial anodes); and
iii) Electrical isolation devices such as
insulating joints and flanges, etc.
BOARD NOTE: The practices described in the National
Association of Corrosion Engineers (NACE) Standard, "Control of External
Corrosion on Metallic Buried, Partially Buried, or Submerged Liquid Storage
Systems", NACE Recommended Practice RP0285, and "Cathodic Protection of
Underground Petroleum Storage Tanks and Piping Systems", API Recommended
Practice 1632, each incorporated by reference in 35 Ill. Adm. Code
720.111(a),
may be used, where applicable, as guidelines in providing corrosion protection
for tank systems.
4) For underground tank system components
that are likely to be affected by vehicular traffic, a determination of design
or operational measures that will protect the tank system against potential
damage; and
5) Design
considerations to ensure the following:
A)
Tank foundations will maintain the load of a full tank;
B) Tank systems will be anchored to prevent
flotation or dislodgement where the tank system is placed in a saturated zone,
or is located within a seismic fault zone; and
C) Tank systems will withstand the effects of
frost heave.
b) The owner and operator of a new tank
system must ensure that proper handling procedures are adhered to in order to
prevent damage to the system during installation. Prior to covering, enclosing
or placing a new tank system or component in use, an independent, qualified
installation inspector or a qualified Professional Engineer, either of whom is
trained and experienced in the proper installation of tank systems or
components, must inspect the system or component for the presence of any of the
following items:
1) Weld breaks;
2) Punctures;
3) Scrapes of protective coatings;
4) Cracks;
5) Corrosion; and
6) Other structural damage or inadequate
construction or installation. All discrepancies must be remedied before the
tank system is covered, enclosed, or placed in use.
c) New tank systems or components and piping
that are placed underground and which are backfilled must be provided with a
backfill material that is a noncorrosive, porous, and homogeneous substance
which is carefully installed so that the backfill is placed completely around
the tank and compacted to ensure that the tank and piping are fully and
uniformly supported.
d) All new
tanks and ancillary equipment must be tested for tightness prior to being
covered, enclosed or placed in use. If a tank system is found not to be tight,
all repairs necessary to remedy the leaks in the system must be performed prior
to the tank system being covered, enclosed, or placed in use.
e) Ancillary equipment must be supported and
protected against physical damage and excessive stress due to settlement,
vibration, expansion, or contraction.
BOARD NOTE: The piping system installation procedures
described in "Installation of Underground Petroleum Storage Systems", API
Recommended Practice 1615, or "Chemical Plant and Petroleum Refinery Piping",
ASME/ANSI Standard B31.3 -1987, as supplemented by B31.3a-1988 and B31.3b-1988,
each incorporated by reference in 35 Ill. Adm. Code
720.111(a),
may be used where applicable, as guidelines for proper installation of piping
systems.
f) The owner and
operator must provide the type and degree of corrosion protection necessary,
based on the information provided under subsection (a)(3), to ensure the
integrity of the tank system during use of the tanks system. An independent
corrosion expert must supervise the installation of a corrosion protection
system that is field fabricated to ensure proper installation.
g) The owner and operator must obtain and
keep on file at the facility written statements by those persons required to
certify the design of the tank system and supervise the installation of the
tank system in accordance with the requirements of subsections (b) through (f)
to attest that the tank system was properly designed and installed and that
repairs, pursuant to subsections (b) and (d) were performed. These written
statements must also include the certification statement, as required in 35
Ill. Adm. Code
702.126(d).