Applicability of this rule is as follows:
This rule applies to Volatile Organic Liquid Storage Tanks at:
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
This rule applies to any facility subject
to rules 1200-03-18-.78
(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.
For the purpose of this rule, the
following definitions, with precedence as listed below, apply:
Any applicable definition in Subparagraph
(c) Any definition in
Rules .10, .11 and .61 of rule 1200-03-16.
Standards for Volatile Organic Compounds:
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.
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
(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
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
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
8. Each penetration of
the internal floating roof that allows for passage of a ladder shall have a
gasketed sliding cover.
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.
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
owner or operator of an affected source is subject to the following reporting
and recordkeeping requirements:
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
, 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
(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.
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.