Standard for Internal Retrofit Systems for Underground Tanks for Flammable and Combustible Liquids

1.1    This Standard provides minimum requirements for nonmetallic internal retrofit systems intended for field installation in underground tanks for the storage of flammable and combustible liquids   , such as:
A.    Petroleum products, including petroleum hydrocarbon fuels with low bio-blends per specifications and similar flammable or combustible liquid petroleum derivatives, such as fuel components (cetane, hexane, heptane), and oils (lubricating, hydraulic, machine);
B.    Oxygenated fuel blends, including all "petroleum products" liquids; plus, petroleum hydrocarbon fuels with low-biofuels blends;
C.    Oxygenates, including all “petroleum products” and "oxygenated fuel blends" liquids; plus, pure/denatured or highest oxygenated blend stocks for use in mixing of dispensed lower fuel- blends and components, such as biodiesel and ethanol; and
D.    Other flammable and combustible liquids that can be demonstrated to be compatible with the internal retrofit system materials.

Refer to Annex A (Informative) for a list of standards on fuels and other flammable and combustible liquids.
 

1.2 These retrofit systems are nonmetallic thermoset (such as fibre reinforced plastic [FRP], epoxy, polyurethane [PUR] or polyesters) or thermoplastic (such as polyethylene [PE]) materials that may or may not be bonded to the interior tank wall of the host tank, depending upon the system type. These products typically use prefabricated sections with coatings applied on site, or homogeneous or layered spray- on/roll-on materials applied on site,and may optionally cover minor repair prior to the installation of a retrofit system, and the installation of bulkheads to the host tank  .
A.    Lining systems provide only primary containment of stored fuels, and do not add significant structural strength to the host tank;
B.    Upgrade systems provide both primary containment and secondary containment of stored fuels with interstitial monitoring, and are co-structural with the host tank; and

C.    Structural systems provide both primary containment and secondary containment of stored fuels with interstitial monitoring. This system may provide a primary containment of stored fuels and utilizes the host tank as secondary containment of stored fuels with interstitial monitoring, or the system may provide both primary containment and secondary containment of stored fuels with interstitial monitoring independent of the host tank.
 

1.3 Retrofit systems covered by this Standard are intended to be installed and used per, but not limited to, one or more of the following:
A In Canada:
1)    National Fire Code of Canada, Part 4;
2)    CSA B139, Installation Code for Oil Burning Equipment;
3)    CCME Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products; and
4)    Regulations of the appropriate authority having jurisdiction.
B In the US:
1)    Flammable and Combustible Liquids Code, NFPA 30;
2)    Code for Motor Fuel Dispensing Facilities and Garages, NFPA 30A;
3)    Uniform Fire Code, NFPA 1;
4)    International Fire Code published by the International Fire Council; or
5)    Other applicable federal and state regulations for the specific product or application it is being utilized in.
 

1.4 These retrofit systems are intended for field installation, only by qualified persons, inside the host tank without a need for excessive excavation, per the manufacturer's instructions and the local requirements. Prior to installation, cleaning, inspecting, repairing and preparing the host tank interior surface is also conducted by qualified persons per the manufacturer’s instructions.
 

1.5 These retrofit systems are intended to be periodically inspected and maintained for continued service or taken out of service if deemed necessary by qualified persons per industry recommended practices, the manufacturer’s instructions, or applicable regulations.

1.6 These retrofit systems and the manufacturer’s installation instructions have not been investigated for their physiological effect, if any, for safety of any persons during the installation process, and the potential risk associated with the opening, entering, purging, cleaning, inspecting, surface preparation, system installation, and testing of a tank that has been used to store flammable or combustible liquids.

1.7 These retrofit systems and requirements are not intended to cover or evaluate the installation equipment, safety of the installer, compliance with worker safety regulations (such as confined spaces,  hazardous locations, OSHA, or CCOHS), or any environmental emissions or disposal regulations (such as EPA or ECCC). 

1.8 These retrofit systems have not been evaluated for use after natural disasters, or exposures to chemicals not representative of the test liquids or excessive physical damage beyond the expected installation and uses as identified in these requirements.

1.9 This Standard does not cover additional claims, if any, related to the effect, if any, of the product’s materials on fuel quality or properties.

1.10 These requirements do not cover thin coatings or paints that may be directly applied to internal tank surfaces, and do not cover flexible or rigid tank bladders that are not directly bonded to internal tank surfaces.

1.11 These requirements do not cover external corrosion protection systems for steel underground tanks, which are found in UL 1746, Standard for External Corrosion Protection Systems for Steel Underground Storage Tanks, or ULC S603.1, Standard for External Corrosion Protection Systems for Steel Underground Tanks for Flammable and Combustible Liquids.