Section 326 IAC 8-9-4 - StandardsAuthority: IC 13-14-8; IC 13-17-3-4
Affected: IC 13-17
Sec. 4.
(a) The owner or operator of each vessel with a capacity greater than or equal to thirty-nine thousand (39,000) gallons, that stores VOL with a maximum true vapor pressure greater than or equal to seventy-five hundredths (0.75) pound per square inch absolute (psia) but less than eleven and one-tenth (11.1) psia shall complete the following:(1) For each vessel having a permanently affixed roof, install one (1) of the following: (A) An internal floating roof meeting the standards in subsection (c).(B) A closed vent system and control device meeting the standards in subsection (d).(C) An emissions control system that has been approved by the department and U.S. EPA based on equivalent emissions reductions to that obtained in clause (A).(2) For each vessel having an internal floating roof, install one (1) of the following: (A) An internal floating roof meeting the standards in subsection (c).(B) A closed vent system and control device meeting the standards in subsection (d).(C) An emissions control system that has been approved by the department and U.S. EPA based on equivalent emissions reductions to that obtained in clause (A).(3) For each vessel having an external floating roof, install one (1) of the following: (A) An external floating roof meeting the standards in subsection (e).(B) A closed vent system meeting the standards in subsection (d).(C) An emissions control system that has been approved by the department and U.S. EPA based on equivalent emissions reductions to that obtained in clause (A).(4) For each vessel subject to this subsection, either:(A) install emission control equipment; or(B) submit a schedule for vessel cleaning and installation of the emission control equipment.(b) The owner or operator of each vessel with a capacity greater than or equal to thirty-nine thousand (39,000) gallons, that stores VOL with a maximum true vapor pressure greater than or equal to eleven and one-tenth (11.1) psia shall equip each vessel with a closed vent system with a control device meeting the standards of subsection (d).(c) Standards applicable to each internal floating roof are as follows:(1) The internal floating roof must float on the liquid surface, but not necessarily in complete contact with it, inside a vessel that has a permanently affixed roof.(2) The internal floating roof must float on the liquid surface at all times, except during initial fill and during those intervals when the vessel is completely emptied or subsequently emptied and refilled.(3) When the roof is resting on the leg supports, the process of filling, emptying, or refilling must be continuous and shall be accomplished as rapidly as possible.(4) Each internal floating roof must be equipped with one (1) of the following closure devices between the wall of the vessel and the edge of the internal floating roof: (A) A foam or liquid-filled seal mounted in contact with the liquid (liquid-mounted seal).(B) Two (2) seals mounted one (1) above the other so that each forms a continuous closure that completely covers the space between the wall of the vessel and the edge of the internal floating roof. The lower seal may be vapor-mounted, but both must be continuous.(C) A mechanical shoe seal that consists of a metal sheet held vertically against the wall of the vessel by springs or weighted levers and that is connected by braces to the floating roof. A flexible coated fabric, or envelope, must span the annular space between the metal sheet and the floating roof.(5) Each opening in a noncontact internal floating roof except for automatic bleeder vents (vacuum breaker vents) and the rim space vents must provide a projection below the liquid surface.(6) Openings in the internal floating roof must meet the following requirements:(A) 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 must be equipped with a cover or lid that is maintained in a closed position at all times, with no visible gap, except when the device is in actual use.(B) The cover or lid must be equipped with a gasket.(C) Covers on each access hatch and automatic gauge float well must be bolted except when they are in use.(7) Automatic bleeder vents must be:(A) equipped with a gasket; and(B) closed at all times when the roof is floating except when the roof is being: (ii) landed on the roof leg supports.(8) Rim space vents must be:(A) equipped with a gasket; and(B) set: (i) to open when the internal floating roof is not floating; or(ii) at the manufacturer's recommended setting.(9) Each penetration of the internal floating roof for the purpose of sampling must be through a sample well opening. The sample well must have a slit fabric cover that covers at least ninety percent (90%) of the opening.(10) Each penetration of the internal floating roof that allows for passage of a ladder must have a gasketed sliding cover.(d) Standards applicable to each closed vent system and control device are as follows:(1) The closed vent system must be:(A) designed to collect all VOC vapors and gases discharged from the vessel; and(B) operated with no detectable emission as indicated by:(i) an instrument reading of less than five hundred (500) parts per million (ppm) above background; and(ii) visual inspections as determined by the methods specified in 40 CFR 60.485(c) *.(2) The control device must be designed and operated to reduce inlet VOC emissions by at least ninety-five percent (95%). If a flare is used as the control device, it must meet the specifications described in the general control device requirements in 40 CFR 60.18 *.(e) Standards applicable to each external floating roof are as follows: (1) Each external floating roof must be equipped with a closure device between the wall of the vessel and the roof edge consisting of two (2) seals, with one (1) above the other, as follows: (A) The lower seal is the primary seal.(B) The upper seal is the secondary seal.(2) Except as provided in section 5(c)(4) of this rule, the primary seal must: (A) completely cover the annular space between the edge of the floating roof and vessel wall; and(B) be either a: (i) liquid-mounted seal; or(3) Except as allowed in section 5(c)(4) of this rule, the secondary seal must completely cover the annular space between the external floating roof and the wall of the vessel in a continuous fashion.(4) Except for automatic bleeder vents and rim space vents, each opening in a noncontact external floating roof must provide a projection below the liquid surface.(5) Except for automatic bleeder vents, rim space vents, roof drains, and leg sleeves, each opening in the roof must be equipped with a gasketed cover, seal, or lid that is maintained in a closed position at all times, without visible gap, except when the device is in actual use.(6) Automatic bleeder vents must be:(A) equipped with a gasket; and(B) closed at all times when the roof is floating except when the roof is being: (ii) landed on the roof leg supports.(7) Rim vents must be:(A) equipped with a gasket; and(B) set: (i) to open when the roof is being floated off the roof leg supports; or(ii) at the manufacturer's recommended setting.(8) Each emergency roof drain must be provided with a slotted membrane fabric cover that covers at least ninety percent (90%) of the area of the opening.(9) The roof must float on the liquid at all times, except when the vessel is completely emptied and subsequently refilled.(10) The process of filling, emptying, or refilling when the roof is resting on the leg supports must be continuous and accomplished as rapidly as possible. *These documents are incorporated by reference. Copies may be obtained from the Government Publishing Office, 732 North Capitol Street NW, Washington, D.C. 20401 or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, Thirteenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.
Air Pollution Control Board; 326 IAC 8-9-4; filed Dec 19, 1995, 3:10 p.m.: 19 IR 1057; errata filed Dec 12, 2002, 3:35 p.m.: 26 IR 1568; filed Aug 26, 2004, 11:30 a.m.: 28 IR 52Filed 7/16/2018, 1:37 p.m.: 20180815-IR-326150427FRA