§ 27-317. Out-of-service and closure requirements.
(a)
Temporarily out-of-service. Field-erected storage tank systems taken temporarily out-of-service shall:
(1)
Continue to operate and maintain corrosion protection in accordance with section 27-309(a)(2);
(2)
If the tank system has an external release detection method, perform release detection monthly in accordance with applicable provisions of section 27-308; and
(3)
Leave venting systems open and functioning.
(b)
Out-of-service storage tank systems.
(1)
General.
a.
Storage tank systems that are taken out-of-service, as defined in section 27-302(a)(60), shall:
1.
Continue to operate and maintain corrosion protection in accordance with section 27-309(a)(2);
2.
Perform external release detection for sites without contamination, as applicable, every six (6) months in accordance with provisions of section 27-308(c)(2);
3.
Leave vent lines open and functioning;
4.
Empty the system and cap or secure all lines, pumps, passage ways, and ancillary equipment, as applicable; and
5.
Secure or close off the system to outside access.
b.
If the storage tank system is required to be upgraded during the time that it is out-of-service, it shall be upgraded or replaced in accordance with this chapter before it is returned to service.
c.
Systems with secondary containment installed and operated in accordance with this chapter may remain in a continuous out-of-service status for ten (10) years. After this period, the system shall be returned to service or closed in accordance with section 27-317(c).
d.
Tightness, pressure, or other tests shall be performed in accordance with section 27-308(c)(3), as applicable, on any systems being returned to service.
(2)
Underground storage tank systems.
a.
Before being returned to service, the following tests shall be performed in accordance with section 27-308(c)(3), for systems that are taken out-of-service for more than one hundred eighty (180) days:
1.
A tightness test for single-walled systems; or
2.
A breach of integrity test for double-walled Category-C systems.
b.
Single-walled systems that are taken out-of-service shall not be kept out-of-service longer than two (2) years for corrosion-protected systems or one (1) year for unprotected bare steel systems. After the end of these time periods, the systems shall either be upgraded or permanently closed.
(3)
Aboveground storage tank systems.
a.
Systems without secondary containment shall not remain in a continuous out-of-service status for more than five (5) years. Before the expiration of this five (5) year time period, any remaining product and sludges shall be removed, and a closure assessment shall be performed in accordance with section 27-317(d) for:
1.
AST Category-A and Category-B systems, regardless of when taken out-of-service, by December 31, 1999; or
2.
Systems taken out-of-service after July 13, 1998.
b.
Out-of-service tanks that are returned to service shall be:
1.
Inspected and evaluated in accordance with section 27-307(a)(3)b.1., for shop-fabricated tanks; or
2.
Structurally evaluated in accordance with API Standard 653 for field-erected tanks, unless the system has been out-of-service for less than six (6) months.
c.
Field-erected tanks changing the type of product stored within the tank shall comply with API Standard 653, section 2.2.4.
(c)
Closure of storage tank systems.
(1)
General.
a.
Closure of storage tank systems shall be performed by:
1.
Removing all liquids and accumulated sludges;
2.
Disconnecting and capping, or removing, all integral piping. Manways shall be secured to prevent access;
3.
Closing the storage tank system in accordance with section 27-317(c)(2) through (3), as applicable; and
4.
Conducting a closure assessment in accordance with section 27-317(d).
b.
After closure, storage tank systems may be used to store materials or substances other than regulated substances in accordance with all applicable EPGMD reference standards (for example, API 1604). Owners and operators are advised that other federal, state, or local requirements may apply to these activities.
c.
Monitoring wells associated with closed systems that are not being used for release detection or site assessment purposes shall be closed in accordance with section 27-308(a)(1)k.
(2)
Underground storage tank systems.
a.
Unmaintained systems shall be permanently closed within ninety (90) days of discovery.
b.
System removal, closure in-place, and disposal shall be performed:
1.
In accordance with API RP 1604 and NFPA 30; and
2.
By a Certified Contractor if the system is removed from the ground, unless it is closed in place by filling it with a solid inert material of sufficient density to prevent a structural collapse of the closed system.
(3)
Aboveground storage tank systems.
a.
Unmaintained systems shall be permanently closed within ninety (90) days of discovery.
b.
The tank shall be rendered free of pollutant vapors at the time of closure to prevent hazardous explosive conditions, and maintained to prevent future explosive conditions.
c.
The tank shall be protected from flotation in accordance with NFPA 30, section 2-6.
(d)
Closure assessment of storage tank systems.
(1)
At time of closure, replacement, installation of secondary containment, or change in service from a hazardous material to a non-hazardous material, an assessment shall be performed to determine if a discharge from the system or system components has occurred.
a.
If a Site Rehabilitation Completion Order (SRCO) or a Monitoring Only Plan (MOP) Approval Order has been issued by the EPGMD for a contaminated area of a site, a closure assessment shall be performed for any subsequent storage tank system removal, replacement, or installation of secondary containment.
b.
Tanks, pipes, or other system components in contact with soil at any site are subject to closure assessment requirements.
(2)
A closure assessment is not required for:
a.
Sites with documented contamination requiring a site assessment in accordance with Chapter 62-770, F.A.C., including those that are eligible for the Early Detection Incentive Program (EDI), the Florida Petroleum Liability and Restoration Insurance Program (FPLRIP), and the Petroleum Cleanup Participation Program (PCPP), pursuant to §§ 376.3071, 376.3072, F.S. Nevertheless, documentation of procedures followed and results obtained during closure shall be reported in a Limited Closure Summary Report, Form 62-761.900(8), F.A.C., and in accordance with Section A of FDEP's "Storage Tank System Closure Assessment Requirements";
b.
Systems initially installed with secondary containment, provided that no unexplained positive response of an interstitial release detection device or method occurred during the operational life of the system, or the secondary containment passed a breach of integrity test prior to closure;
c.
Systems upgraded with secondary containment that have closed interstitial spaces, where a closure assessment was performed prior to installation of secondary containment, provided that the secondary containment passed a breach of integrity test in accordance with section 27-308(c)(3)a.;
d.
Double-walled shop-fabricated aboveground tanks; and
e.
Aboveground systems with storage capacities less than one thousand one hundred (1,100) gallons that are upgrading with secondary containment, and that are elevated from and not in contact with the soil. Instead of performing a closure assessment, a visual inspection may be performed of the system and the ground surface underneath it for signs of a discharge. Written certification shall be provided to the County within ten (10) days after installation of the secondary containment, documenting that there has been no discharge.
(3)
Closure assessment sampling and analysis shall be conducted according to FDEP's "Storage Tank System Closure Assessment Requirements."
(4)
A closure assessment report shall be submitted to the County within sixty (60) days of completion of any of the activities listed in section 27-317(d)(1). The report shall include sample types, sample locations and measurement methods, a site map, methods of maintaining quality assurance and quality control, and any analytical results obtained during the assessment in accordance with FDEP's "Storage Tank System Closure Assessment Requirements."
(5)
Persons are advised that contaminated soil excavated, disposed of, or stockpiled on site during the closure of a storage tank system is regulated by Chapter 62-770, F.A.C.
(Ord. No. 1999-46, § 1, 8-31-99; Ord. No. 2005-11, § 9, 5-24-05)