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Ch. 15, Art. 10-3
<br />of subsections (c)(1) -(c)(2)(13)2. and amendment of Note filed 9-8-2006; operative 10-8-2006 (Register 2006, No. 36).
<br />§66265.192. Design and Installation of New Tank Systems or Components.
<br />(a) Owners or operators of new tank systems or components shall ensure that the foundation, structural
<br />support, seams, connections, and pressure controls (if applicable) are adequately designed and that the tank system
<br />has sufficient structural strength, compatibility with the waste(s) to be transferred, stored or treated, and corrosion
<br />protection so that it will not collapse, rupture, or fail. The owner or operator shall obtain a written assessment
<br />reviewed and certified by an independent, qualified, professional engineer, registered in California in accordance with
<br />section 66270.11(d) attesting that the system has sufficient structural integrity, is acceptable for the transferring,
<br />storing and treating of hazardous waste, and that the tanks and containment system are suitably designed to achieve
<br />the requirements of this article. This assessment shall be obtained prior to placing the tank system in service, and
<br />shall be kept on file at the facility. This assessment shall also include, at a minimum, the following information:
<br />(1) design standard(s) according to which the tank(s) and ancillary equipment are or will be constructed;
<br />(2) hazardous characteristics of the waste(s) to be handled;
<br />(3) for new tank systems or components in which the external shell of a metal tank or any external metal
<br />component of the tank system is or will be in contact with the soil or with water, a determination by a corrosion expert
<br />of:
<br />(A) factors affecting the potential for corrosion, including but not limited to:
<br />1. soil moisture content;
<br />2. soil pH;
<br />3. soil sulfides level;
<br />4. soil resistivity;
<br />5. structure to soil potential;
<br />6. influence of nearby underground metal structures (e.g., piping);
<br />7. stray electric current; and,
<br />8. existing corrosion -protection measures (e.g., coating, cathodic protection), and
<br />(B) the type and degree of external corrosion protection that are needed to ensure the integrity of the tank
<br />system during the use of the tank system or component, consisting of one or more of the following:
<br />1. corrosion -resistant materials of construction such as special alloys or fiberglass -reinforced plastic;
<br />2. corrosion -resistant coating (such as epoxy or fiberglass) with cathodic protection (e.g., impressed current
<br />or sacrificial anodes); and
<br />3. electrical isolation devices such as insulating joints and flanges;
<br />(4) for underground tank system components that are likely to be affected by vehicular traffic, a
<br />determination of design or operational measures that will protect the tank system against potential damage; and
<br />(5) design considerations to ensure that:
<br />(A) tank foundations will maintain the load of a full tank;
<br />(B) tank systems will be anchored to prevent flotation or dislodgement where the tank system is placed in a
<br />saturated zone, or is located within a seismic fault zone; and
<br />(C) tank systems will withstand the effects of frost heave.
<br />(b) The owner or operator of a new tank system shall ensure that proper handling procedures are adhered to
<br />in order to prevent damage to the system during installation. Prior to covering, enclosing, or placing a new tank
<br />system or component in use, an independent, qualified installation inspector or an independent, qualified,
<br />professional engineer, registered in California, either of whom is trained and experienced in the proper installation of
<br />tank systems, shall inspect the system or component for the presence of any of the following items:
<br />(1) weld breaks;
<br />(2) punctures;
<br />(3) scrapes of protective coatings;
<br />(4) cracks;
<br />(5) corrosion;
<br />(6) other structural damage or inadequate construction or installation. All discrepancies shall be remedied
<br />before the tank system is covered, enclosed, or placed in use.
<br />(c) New tank systems or components and piping that are placed underground and that are backfilled shall be
<br />provided with a backfill material that is a noncorrosive, porous, homogeneous substance and that is carefully installed
<br />so that the backfill is placed completely around the tank and compacted to ensure that the tank and piping are fully
<br />and uniformly supported.
<br />(d) All new tanks and ancillary equipment shall be tested for tightness prior to being covered, enclosed or
<br />placed in use. If a tank system is found not to be tight, all repairs necessary to remedy the leak(s) in the system shall
<br />be performed prior to the tank system being covered, enclosed, or placed in use.
<br />(e) Ancillary equipment shall be supported and protected against physical damage and excessive stress due
<br />to settlement, vibration, expansion or contraction.
<br />(f) The owner or operator shall provide the type and degree of corrosion protection necessary, based on the
<br />information provided under subsection (a)(3) of this section, to ensure the integrity of the tank system during use of
<br />the tank system. The installation of a corrosion protection system that is field fabricated shall be supervised by an
<br />independent corrosion expert to ensure proper installation.
<br />(g) The owner or operator shall obtain and keep on file at the facility written statements by those persons
<br />required to certify the design of the tank system and supervise the installation of the tank system in accordance with
<br />Unofficial Title 22 © 2005 State of California, all rights reserved. May not be commercially reproduced or sold. 6/9/08
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