- The Insulated
Secondary Containment Aboveground Storage Tank Systems for
Flammable and Combustible Liquids, Protected Type: Vehicle
Impact Protected, and Projectile Resistant shall be tested
to and listed for the following:
- UL - 142, aboveground
steel tanks for flammable and combustible liquids.
- UL - 2085,
two-hour furnace fire test and two hour simulated pool
fire test for insulated and protected tanks.
- UL - 2085 and
UFC Test Standard (Article 79 or APPENDIX #A-II-F-1),
for both Vehicle Impact Protection and Projectile Resistance.
- UL - 2085,
Protected aboveground tanks for flammable and combustible
liquids.
- UL - 2085,
Non-Metallic Secondary Containment protected tanks for flammable
and combustible liquids with secondary containment Emergency
Venting by "Form of Construction".
- CAN/ULC - S601 (ORD -
142.18), Standard for shop fabricated steel aboveground
horizontal tanks for flammable and combustible liquids.
- CAN/ULC - S655
(ORD - C 142.16), Standard for protected aboveground tank
assemblies for flammable and combustible liquids
-
CAN/ULC - (ORD - C 142.5), Standard for concrete encased aboveground
tank assemblies for flammable and combustible liquids.
- CAN/ULC - (ORD
- C 142.16), the furnace burn requirements for two hour
fire rating.
- CAN/ULC - (ORD
- C 142.25), the open (pool) fire testing for two-hour
flammable liquid fire test.
- CAN/ULC - (ORD
- 142.23), for aboveground tanks for used oil.
- The requirement
for Uniform Fire Code (UFC) for two-hour (firewall) test.
- To
be tested and certified
by the California Air Resources Board (CARB) for Balanced
Phase 1 and Phase 2 Vapor Recovery including methanol and
ethanol.
- High Explosive (HE) Blast Resistance: The tank system design shall be the subject of a Blast Effects Analysis (BEA) for resistance under the following blast threat load scenarios:
1) a 50-pound HE man-portable improvised explosive device (MPIED) at the standoff distance of 5 feet;
2) a 500-pound HE vehicle-born improvised explosive device (VBIED) at the standoff distance of 20 feet; and
3) a vapor cloud explosion (VCE) with a load of 10 psi.
The BEA shall conclude that the tank system shall resist the explosion loads and remain intact, without failure of the primary tank.
The engineering consultants performing the BEA shall be a nationally recognized firm with over 10 years experience offering comprehensive services related to blast and impact effects analysis, explosive safety design, vulnerability assessments and threat mitigation.
- The primary steel
tank shall be rectangular in shape and have
continuous welds on all exterior seams, manufactured in accordance
with UL listing requirements and UL Standard 142.
- The primary steel
tank shall be pressure tested at 5 psig for 24 to 48 hours.
- The primary steel
tanks shall have "emergency vent" system as per NFPA 30 Code
requirements.
- The protected and
insulated AST systems shall have a thru-tank leak detector
tube to allow for physical checkup and monitoring capability
between the primary and the secondary containment.
- The primary steel
tank shall be pressurized at 5 psig during concrete encasement.
- The outer surface
of the primary steel tank shall be covered by a minimum of
1/4" thick (6.4 mm) Styrofoam insulation panels.
- The secondary containment
shall consist of a 30 Mil thick (0.76 mm) High-Density Polyethylene
membrane enclosing the steel tank and insulation material.
- The primary steel
tank and the secondary containment shall be encased in six
inches of monolithic reinforced concrete, with minimum design
strength of 4,000 and 5,000 psi at 28 days depending on the
tank size. The concrete design shall include the following
for long-term durability: air entrainment, water reducing
admixture, and steel reinforcement. Concrete encasements with
seams will not be approved.
- The protected and
insulated AST systems shall be of concrete exterior and a
continuous and visually verifiable monolithic (seamless) pour
on top, bottom, ends, and sides and contain no cold joints
or heat sinks (heat transfer points). The AST must be shop
fabricated and tested in accordance with the UL listings.
Designs that use two layers of steel with insulation material
between them will not be approved.
- No steel or insulating
material shall come in contact with the concrete or other
corrosive material.
- All openings shall
be from the top only.
- All exposed metal
with the exception of stainless steel must be powder coated to inhibit corrosion.
- The protected and
insulated AST systems shall include a 7 or 15-gallon
powder coated or stainless steel, UL listed spill containment, and shall include
normally closed valve to release spilled product into the
primary steel tank. Spill containment which route the spilled
product into interstitial area will not be approved.
- The protected and
insulated AST systems shall have a coated concrete exterior
to resist weather and reflect sunlight. Models with steel
exteriors will not be approved.
- The protected
and insulated AST systems shall have a warranty of 30 years
for systems 2,000 gallon capacity and larger and 20 years
for systems 1,000 gallon capacity and smaller with optional
30-year warranty.
- The protected and
insulated AST systems design shall have been in use for a
minimum of twenty (20) years. The manufacturer must stipulate
no reportable AST containment system failure in 30,000 units produced.
- The protected and
insulated AST systems shall have two (2) bolts for connecting
grounding conductors for lightning protection in accordance
with NFPA 780.
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