Section 1200-03-18-.48 - VOLATILE ORGANIC LIQUID STORAGE TANKS(1) Applicability of this rule is as follows:(a) This rule applies to Volatile Organic Liquid Storage Tanks at: 1. Any facility in Davidson, Rutherford, Sumner, Williamson, or Wilson County having potential Volatile Organic Compounds (VOC) emission of 100 tons per year or greater from Volatile Organic Liquid Storage Tanks. In calculation to determine whether this applicability threshold is exceeded, potential VOC emissions are not included from any storage vessel subject to standards in rules 1200-03-18-.22 through 1200-18-.24, 1200-03-18-.28 and 1200-03-18-.29, or;2. This rule applies to any facility subject to rules 1200-03-18-.78 or .79.(b) Any storage vessel with a capacity of 37.9 m3 (10,000 gal.) or less shall comply with the standard as prescribed in Subparagraph (3)(d) of this rule.(c) Any storage vessel subject to rules 1200-03-18-.22 through 1200-18-.24, 1200-03-18-.28 and 1200-03-18-.29 shall not be subject to the standards of this rule.(2) For the purpose of this rule, the following definitions, with precedence as listed below, apply: (a) Any applicable definition in Subparagraph 1200-03-18-.01 of this chapter.(b) Any applicable definition in rules 1200-03-18-.28 and 1200-03-18-.29, 1200-03-18-.22 through 1200-03-18-.24 of this chapter.(c) Any definition in 40 C.F.R Part 60, subparts K, Ka, and Kb. The provisions of 40 C.F.R. Part 60, subparts K, Ka, and Kb are hereby incorporated by reference as published in the July 1, 2022, edition of the Code of Federal Regulations.(3) Standards for Volatile Organic Compounds: (a) Each fixed roof tank with a design capacity greater than 37.9 m3 (10,000 gal.) shall be equipped with an internal floating roof meeting the following specifications or a vapor control system meeting the specification of Part 9. of this Subparagraph: 1. The internal floating roof shall rest or float on the liquid surface (but not necessarily in complete contact with it) inside a storage vessel that has a fixed roof, except during initial fill and during those intervals when the storage vessel is emptied or subsequently emptied and refilled.2. Each internal floating roof shall be equipped with one of the following closure devices between the wall of the storage vessel and the edge of the internal floating roof:(i) A foam-or liquid-filled seal mounted in contact with the liquid (liquid-mounted seal). A liquid-mounted seal means a foam-or liquid-filled seal mounted in contact with the liquid between the wall of the storage vessel and the floating roof continuously around the circumference of the tank.(ii) Two seals mounted one above the other so that each forms a continuous closure that completely covers the space between the wall of the storage vessel and the edge of the internal floating roof. The lower seal may be vapor-mounted, but both must be continuous.(iii) A mechanical shoe seal. A mechanical shoe seal is a metal sheet held vertically against the wall of the storage vessel by springs or weighted levers and is connected by braces to the floating roof. A flexible coated fabric (envelope) spans the annular space between the metal sheet and the floating roof.3. Each opening in a noncontact interval floating roof except for automatic bleeder vents (vacuum breaker vents) and the rim space vents is to provide a projection below the liquid surface.4. Each opening in the internal floating roof except for leg sleeves, automatic bleeder vents, rim space vents, column wells, ladder wells, sample wells, and stub drains is to be equipped with a cover or lid which is to be maintained in a closed position at all times (i.e., no visible gap) except when the device is in actual use. The cover or lid shall be equipped with a gasket. Covers on each access hatch and automatic gauge float well shall be bolted except when they are in use.5. Automatic bleeder vents shall be equipped with a gasket and are to be closed at all times when the roof is floating except when the roof is being floated off or is being landed on the roof leg supports.6. Rim space vents shall be equipped with a gasket and are to be set to open only when the internal floating roof is not floating or at the manufacturer's recommended setting.7. Each penetration of the internal floating roof for the purpose of sampling shall be a sample well. The sample well shall have a slit fabric cover that covers at least 90 percent of the opening.8. Each penetration of the internal floating roof that allows for passage of a ladder shall have a gasketed sliding cover.9. A closed vent system and control device meeting the following specifications: (i) The closed vent system shall be designed to collect all VOC vapors and gases discharged from the storage vessel and operated with no detectable emission as indicated by an instrument reading of less than 500 ppm above background, and;(ii) The control device shall be designed and operated to reduce inlet VOC emissions by 95 percent or greater.(b) Each external floating roof tank shall meet the following specifications: 1. Each external floating roof shall be equipped with a closure device between the wall of the storage vessel and the roof edge. The closure device is to consist of two seals, one above the other. The lower seal is referred to as the primary seal, and the upper seal is referred to as the secondary seal.2. The primary seal shall completely cover the annular space between the edge of the floating roof and tank wall and shall be either a liquid mounted seal or a shoe seal.3. The secondary seal shall completely cover the annular space between the external floating roof and the wall of the storage vessel in a continuous fashion.4. The tank shall be equipped with the closure device after the effective date of this rule.5. Except for automatic bleeder vents and rim space vents, each opening in a noncontact external floating roof shall provide a projection below the liquid surface. Except for automatic bleeder vents, rim space vents, roof drains, and leg sleeves, each opening in the roof is to be equipped with a gasketed cover, seal, or lid that is to be maintained in a closed position at all times (i.e., no visible gap) except with the device is in actual use. Automatic bleeder vents are to be closed at all times when the roof is floating except when the roof is being floated off or is being landed on the roof leg supports. Rim vents are to be set to open when the roof is being floated off the roof leg supports or at the manufacturer's recommended setting. Automatic bleeder vents and rim space vents are to be gasketed. Each emergency roof drain is to be provided with a slotted membrane fabric cover that covers at least 90 percent of the area of the opening.6. The roof shall be floating on the liquid at all times (i.e., off the roof leg supports) except when the tank is completely emptied and subsequently refilled. The process of filling, emptying, or refilling when the roof is resting on the leg supports shall be continuous and shall be accomplished as rapidly as possible.(c) The owner or operator of each storage vessel subject to the Parts (1)(a)1., and 2. of this rule shall equip each storage vessel with a closed vent system and control device as specified in Part 9. of Subparagraph (3)(a) of this rule.(d) The owner or operator of each storage vessel subject to the Parts (1)(a)1., and 2. and Subparagraph (b) of this rule shall equip each storage vessel port with a cap which is consistent with the vessels manufacturer's requirements, unless the port is used for pressure relief valve.(4) The owner or operator of an affected source is subject to the following reporting and recordkeeping requirements:(a) The owner or operator of an affected source subject to the emission standards in Paragraph (3) of this rule shall demonstrate compliance with those provisions and with the initial compliance certification requirements of Rule 1200-03-18-.04, except that the date for submittal of the initial compliance certification for each existing source as of August 2, 1996, is November 15, 1996, and for each new sources after August 2, 1996, is within 180 days after the start-up of that source.(b) If a storage vessel has a potential VOC emissions of less than 100 tons per year, the owner or operator of such vessel shall maintain records which document that the potential VOC emissions from those vessels are less than the applicability threshold as specified in Subparagraph (1)(a) of this rule. An owner or operator of such vessel shall submit, upon request by the Technical Secretary, records that document that the vessel is exempt from these requirements. These records shall be submitted to the Technical Secretary within 30 calendar days from the date of request.(c) The owner or operator of the subject VOC vessel shall perform all testing and maintain the results of all tests and calculations required under Paragraphs (1) and (3) of this rule to demonstrate that the subject source is in compliance and shall maintain these records for a minimum of 5 years, and shall make these records available to the Technical Secretary upon request.(5) With respect to petitioning for a source-specific compliance schedule according to and as provided for in Rule .07 of this chapter, insure the petition is received by the Technical Secretary no later than February 2, 1997, or October 1, 1996, whichever is earlier, rather than October 22, 1993. Under this paragraph, the applicable date on which a source must be an existing source or before which a state or local agency's construction permit must have been issued for the source to be eligible to petition for a source-specific compliance schedule is August 2, 1996, rather than April 22, 1993, as specified in the first sentence of Paragraph .07(1) of this chapter.Tenn. Comp. R. & Regs. 1200-03-18-.48
Original rule filed May 22, 1996; effective August 2, 1996. Amendments filed September 16, 2024; effective 12/15/2024.Authority: T.C.A. §§ 4-5-201, et seq.; 68-201-101, et seq.; and 68-201-105.