ConVault Specification 3-2010.pdf

SPECIFICATIONS

ConVault® UL Listed 2085 Rectangular Protected/Secondarily Contained Aboveground Tank

1.0 GENERAL DESCRIPTION AND STANDARDS

1.1. Provide the rectangular ConVault® Aboveground Tank system constructed and listed in accordance with Underwriters Laboratories, Inc. (UL) Standard 2085, Aboveground Storage Tanks for Flammable and Combustible Liquids, Protected Type, Non-Metallic Secondary Containment with Vehicle Impact and Projectile Resistance.

1.2. The tank system must comply with all provisions of: 1) UFC 79-7, Appendix A-II-F, for both Vehicle Impact Protection and Projectile Resistance; 2) NFPA 30 and 30A; 3) IFC Chapter 22; and 4) IFC Chapter 34.

1.3. The tank system shall be tested, certified and approved for Vapor Recovery by the State of California Air Resource

Board (CARB) under Executive Order VR-302-B Standing Loss Control Recovery System for New Installations of Aboveground Storage Tanks effective 11/30/09.

1.4. The tank system shall be warranted by the manufacturer against defects in material or workmanship for 20 or 30 years following the delivery of the tank. Warranties that limit such coverage for shorter periods will not be permitted. See warranty documents.

1.5. The manufacturer of the tank system shall provide a Buy American Act Certificate confirming compliance with the provisions of the American Recovery and Reinvestment Act of 2009.

2.0 DESIGN AND CONSTRUCTION

2.1 Primary Tank: The primary tank shall be rectangular in shape and listed per UL Standard 142. Welds shall be continuous on all sides and exterior seams, conforming to the American Welding Society Standard for continuous weld. The primary steel tank shall be pressure tested at 5 psig for a minimum of 24 hours. All openings shall be from the top only.

2.2 Concrete Encasement: A vaulted concrete enclosure shall encase and protect both the primary steel tank and the secondary containment. The concrete encasement shall be 6” thick with a minimum design strength of 4000 psi. The concrete design shall include the following for long-term durability: air entrainment, water-reducing admixture, and steel reinforcement. Concrete placement shall be a visually verifiable monolithic (seamless) pour to ensure the absence of voids on all sides and beneath the steel tank. Designs with an unprotected secondary containment will not be permitted.

The vault enclosure shall have concrete support legs of unitized monolithic construction raising the concrete enclosure a minimum of 3” above the ground to meet visual inspection requirements. A mid-level seam or other cold joint construction which could compromise the liquid tightness (secondary containment) and fire protection capability of the vault is not permitted.

2.3 Thermal Protection: The tank system construction shall include covering the outer surface of the primary steel tank with a minimum 1/4” inch of polystyrene foam panels and 6” thick reinforced concrete for thermal insulation to protect against temperature extremes.

2.4 High Explosive (HE) Blast Resistance: The tank system design shall have been subjected to a Blast Effects

Analysis (BEA) assessing resistance and performance under the following blast threat scenarios per the FEMA 426 - Reference Manual to Mitigate Potential Terrorist Attacks Against Buildings: 1) a 50-pound man-portable improvised explosive device (MPIED) at the standoff distance of 5 ft. ; 2) a 500-pound vehicle-born improvised explosive device (VBIED) at the standoff distance of 20 ft.; and 3) a vapor cloud explosion (VCE) with a load of 10 psi.

The BEA shall conclude that the tank system will resist the explosion loads and remain intact, without failure of the primary tank or movement of the tank exceeding 2”. The engineering consultants performing the BEA shall be a nationally recognized firm offering comprehensive services related to blast and impact effects analysis, explosive safety design, vulnerability assessments and threat mitigation.

2.5 Fire Resistance: The tank system shall be designed and tested to provide 2 hour fire protection for the primary tank as per UL 2085 2-hour furnace fire test and 2 hour simulated pool fire test. The average maximum rise in temperature of the primary tank during the test shall not exceed 260° F and the maximum temperature of any single point on the primary tank shall not exceed 400° F. No steel members shall penetrate the walls or floor of the concrete encasement to assure isolation from pool fire heat.

2.6 Secondary Containment and Corrosion Protection: The tank system shall include secondary containment consisting of an impervious barrier of 30 Mil (0.76 mm) High-Density Polyethylene enclosing the primary steel tank and insulation material to contain leaks from the primary tank and isolating the primary tank from the concrete to protect against corrosion. All steel exterior to the concrete encasement shall be anti-oxidant powder coated to inhibit corrosion and meet ASTM B117.

2.7 Leak Monitoring: A thru-tank leak detection monitoring tube terminating between the primary tank and the secondary containment shall be provided to monitor any leaks from the primary tank.

2.8 Spill/Overfill Containment: The tank system shall include a U.L.UL listed 7 gallon spill/overfill container manufactured as an integral part of the primary tank, surrounding the fill pipe, and protected by 2 hour fire rating of the enclosure. The spill/overfill container shall include a stick port and normally closed drain valve to release spilled product into the main tank. Exterior steel shall be anti-oxidant powder coated to inhibit rust

2.9 Overfill Protection: Overfill protection shall be provided by the following methods: a) direct reading level gauge visible from fill pipe access; b) valve rated for pressurized delivery located within fill pipe to close automatically at 95% full level; and c) high level alarm.

2.10 Exterior Finish: The tank system exterior shall be a low maintenance architectural coating or exposed aggregate concrete finish. Models with fiber clad or painted steel exterior tanks will not be accepted.

2.0 EXECUTION

3.1 The tank system shall be installed in strict accordance with the manufacturer’s recommendations, industry standards, and applicable fire and environmental codes. All state and local permits shall be obtained prior to installation.

3.2 The tank system shall be handled, lifted, stored and installed in accordance with the manufacturer’s instructions on a reinforced concrete base slab designed to support the fully loaded tank. Protective bollards shall be installed where required by state and local codes. Tanks shall be marked on all sides with warning signs and product identification as required by applicable codes.

3.3 The tank system shall be grounded in accordance with NFPA 780 and all electrical work shall be in accordance with applicable codes.

3.4 Any proposed equal alternatives to this specification must be submitted for review and approval prior to bid opening. If the proposed alternative is deemed to present a better solution, review expenses will be waived. If the proposed alternative is denied or deemed to be equal, all expenses incurred for such review are to be paid for by the bidder prior to submittal of bid.

For drawings or more information contact Core Engineered Solutions at: www.core-es.com Phone: (800) 628-5502

Fax: (703) 563-0320 Email: info@core-es.com

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