PERMATANK
PERMATANK® double‐wall jacketed underground storage tank features an inner steel tank coupled with an exterior corrosion‐resistant fiberglass tank. A unique standoff material separating the inner and outer tanks creates a uniform interstitial space ensuring rapid and accurate leak detection.
PERMATANK ® features:
- Meets UL 58, UL 1746 and ULC‐S603.1
- All tanks proven tight throughout installation, via
third party certification, by interstitial vacuum test ‐
13 inches Hg minimum - Provides many options to meet EPA leak detection
requirements for interstitial monitoring, including the
Permatank Precision Vacuum Monitor - Steel provides complete compatibility with all blends of
ethanol and biodiesel fuels - Impermeable to all petroleum products and vapors
Additional features:
- Steel inner tank provides structural strength, while its
exterior wall of fiberglass reinforced plastic prevents
corrosion - Designed shorter than an all‐FRP tank of the same
capacity, reducing the cost of installation and
increasing site layout flexibility - Capacities range up to 60,000 gallons
PERMATANK ® Benefits:
- Steel construction allows for recycling
- Various backfill options allow for money‐saving
installation - Low cost compartments and customization
- Built to nationally‐recognized STI standards with
strict third‐party quality control inspection program
Compatible With a Wide Range of Fuels and Chemicals, Including Biodiesel and Ethanol
PERMATANK® is available from a large network of STI Licensed Manufacturers • www.steeltank.com
Permatank® Double-Wall Jacketed Underground Steel Storage Tanks
- Steel Tank Institute Permatank® and UL Labeled
- Compatible with alternative fuels
- Low cost compartments and customization
- Flat ends reduce installation costs
- Provides safe and effective secondary containment
- Capacities range up to 60,000 gallons
Permatank® Guideline Specification
A) General
1. Provide Permatank® double‐wall jacketed steel‐fiberglass underground storage tanks.
B) Labeling
1. Tanks shall bear the Steel Tank Institute Permatank® label.
2. Underground tanks shall bear the appropriate Listing label.
C) Product Description
1. Tanks shall be manufactured in accordance with Steel Tank Institute Specification for Permatank®.
2. Tanks shall be manufactured and listed in accordance with Underwriters Laboratories UL 58, Steel
Underground Storage Tanks for Flammable and Combustible Liquids and UL 1746, External Corrosion
Protection Systems for Steel Underground Storage Tanks or ULC‐S603.1, Standard for Corrosion Protection
for Steel Underground Tanks for Flammable and Combustible Liquids.
3. All tanks shall provide testable secondary containment and access for interstitial leak detection monitoring.
D) Manufacturer
1. Manufacturer shall be a licensed member company of the Steel Tank Institute and subject to Steel Tank
Institute’s Quality Assurance program.
Permatank® is available from an extensive group of Steel Tank Institute fabricators who participate in the STI Quality Assurance Program.
Under the program, independent quality control inspectors make unannounced visits to STI members, ensuring fabrication to the highest possible standards
