SDAPCD RULE X-KB STDS.OF PERF.FOR VOLATILE ORGANIC LIQUID          
LAST REVISED 10/16/90

          
          SUBPART Kb -    Standards of Performance for Volatile Organic
                          Liquid Storage Vessels (Including Petroleum Liquid 
                          Storage Vessels) for Which Construction, 
                          Reconstruction, or Modification Commenced after 
                          July 23, 1984 (Adopted 3-14-89; Delegation Effect. 
                          7-18-89;  Rev. Effect.  10/16/90)


                RULE 260.110b.   APPLICABILITY AND DESIGNATION OF AFFECTED
                                 FACILITY   (Rev. Effect.  10/16/90)

                (a)   Except as provided in Sections (b), (c), and (d) of this
           rule, the affected facility to which this subpart applies is each
           storage vessel with a capacity greater than or equal to 40 cubic 
           meters (m3) (10,570 gal) that is used to store volatile organic 
           liquids (VOL's) for which construction, reconstruction, or 
           modification is commenced after July 23, 1984.

               (b)  Except as specified in Sections (a) and (b) of Rule
          260.116b, storage vessels with design capacity less than 75 m3
          (19,813 gal) are exempt from the General Provisions (Part 60,
          Subpart A) and from the provisions of this subpart.

               (c)  Except as specified in Sections (a) and (b) of Rule
          260.116b, vessels either with a capacity greater than or equal to
          151 m3 (39,890 gal) storing a liquid with a maximum true vapor
          pressure less than 3.5 kPa (0.51 psia) or with a capacity greater
          than or equal to 75 m3 (19,810 gal) but less than 151 m3 (39,890
          gal) storing a liquid with a maximum true vapor pressure less
          than 15.0 kPa (2.18 psia) are exempt from the General Provisions
          (Part 60, Subpart A) and from the provisions of this subpart.

               (d)  This subpart does not apply to the following:

                    (1)  Vessels at coke oven by-product plants.

                    (2)  Pressure vessels designed to operate in excess of
               204.9 kPa (29.7 psia) and without emissions to the
               atmosphere.

                    (3)  Vessels permanently attached to mobile vehicles
               such as trucks, railcars, barges, or ships.

                    (4)  Vessels with a design capacity less than or equal
               to 1,589.874 m3 (420,000 gal or 10,000 bbl) used for
               petroleum or condensate stored, processed, or treated prior
               to custody transfer.

                    (5)  Vessels located at bulk gasoline plants.

                    (6)  Storage vessels located at gasoline service
               stations.

                    (7)  Vessels used to store beverage alcohol.

               RULE 260.111b. DEFINITIONS  (Rev. Effect.  10/16/90)

               Terms used in this subpart are defined in the Act, in
          Subpart A of this Regulation or in this subpart as follows:

               (a)  "Bulk Gasoline Plant" means any gasoline distribution
          facility that has a gasoline throughput less than or equal to
          75,700 liters (20,000 gal) per day.  Gasoline throughput shall be
          the maximum calculated design throughput as may be limited by
          compliance with an enforceable condition under Federal
          requirement or Federal, State or local law, and discoverable by
          the Control Officer and any other person.

               (b)  "Condensate" means hydrocarbon liquid separated from
          natural gas that condenses due to changes in the temperature or
          pressure, or both, and remains liquid at standard conditions.

               (c)  "Custody Transfer" means the transfer of produced
          petroleum and/or condensate, after processing and/or treatment in
          the producing operations, from storage vessels or automatic
          transfer facilities to pipelines or any other forms of
          transportation.

               (d)  "Fill" means the introduction of VOL (volatile organic
          liquid) into a storage vessel but not necessarily to complete
          capacity.

               (e)  "Gasoline Service Station" means any site where
          gasoline is dispensed to motor vehicle fuel tanks from stationary
          storage tanks.

               (f)  "Maximum True Vapor Pressure" means the equilibrium
          partial pressure exerted by the stored VOL at the temperature
          equal to the highest calendar-month average of the VOL storage
          temperature for VOL's stored above or below the ambient
          temperature or at the local maximum monthly average temperature
          as reported by the National Weather Service for VOL's stored at
          the ambient temperature, as determined:

                    (1)  In accordance with methods described in American
               Petroleum Institute Bulletin 2517, Evaporation Loss From
               External Floating Roof Tanks, (incorporated by reference -
               see 60.17); or

                    (2)  As obtained from standard reference texts; or

                    (3)  As determined by ASTM Method D2879-83
               (incorporated by reference - see 60.17);

                    (4)  Any other method approved by the Administrator.

               (g)  "Reid Vapor Pressure" means the absolute vapor pressure
          of volatile crude oil and volatile nonviscous petroleum liquids
          except liquified petroleum gases, as determined by ASTM D323-82
          (incorporated by reference - see 60.17).

               (h)  "Petroleum" means the crude oil removed from the earth
          and the oils derived from tar sands, shale, and coal.

               (i)  "Petroleum Liquids" means petroleum, condensate, and
          any finished or intermediate products manufactured in a petroleum
          refinery.

               (j)  "Storage Vessel" means each tank, reservoir, or
          container used for the storage of volatile organic liquids but
          does not include:

                    (1)  Frames, housing, auxiliary supports, or other
               components that are not directly involved in the containment
               of liquids or vapors; or

                    (2)  Subsurface caverns or porous rock reservoirs.

               (k)  "Volatile Organic Liquid (VOL)" means any organic
          liquid which can emit volatile organic compounds into the
          atmosphere except those VOL's that emit only those compounds
          which the Administrator has determined do not contribute
          appreciably to the formation of ozone.  These compounds are
          identified in EPA statements on ozone abatement policy for SIP
          revisions (42 FR 35314, 44 FR 32042, 45 FR 32424, and 45 FR
          48941).

               (l)  "Waste" means any liquid resulting from industrial,
          commercial, mining or agricultural operations, or from community
          activities that is discarded or is being accumulated, stored, or
          physically, chemically, or biologically treated prior to being
          discarded or recycled.


               RULE 260.112b. STANDARD FOR VOLATILE ORGANIC COMPOUNDS
                              (VOC)

               (a)  The owner or operator of each storage vessel either
          with a design capacity greater than or equal to 151 m3 (39,890
          gal) containing a VOL that, as stored, has a maximum true vapor
          pressure equal to or greater than 5.2 kPa (0.75 psia) but less
          than 76.6 kPa (11.1 psia) or with a design capacity greater than
          or equal to 75 m3 (19,810 gal) but less than 151 m3 (39,890 gal)
          containing a VOL that, as stored, has a maximum true vapor
          pressure equal to or greater than 27.6 kPa (4.0 psia) but less
          than 76.6 kPa (11.1 psia), shall equip each storage vessel with
          one of the following:

                    (1)  A fixed roof in combination with an internal
               floating roof meeting the following specifications:

                         (i)  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.  The internal floating roof shall be
                    floating on the liquid surface at all times, except
                    during initial fill and during those intervals when the
                    storage vessel is completely emptied or subsequently
                    emptied and refilled.  When the roof is resting on the
                    leg supports, the process of filling, emptying, or
                    refilling shall be continuous and shall be accomplished
                    as rapidly as possible.

                         (ii) 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:

                              (A)  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.  The outer cover of the liquid-mounted seal
                         shall be designed to prevent liquid capillary
                         action.

                              (B)  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.

                              (C)  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.

                         (iii)Each opening in a noncontact internal
                    floating roof except for automatic bleeder vents
                    (vacuum breaker vents) and the rim space vents is to
                    provide a projection below the liquid surface.

                         (iv) 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.

                         (v)  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.

                         (vi) 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.

                         (vii)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.

                         (viii)Each penetration of the internal floating
                    roof that allows for passage of a column supporting the
                    fixed roof shall have a flexible fabric sleeve seal or
                    a gasketed sliding cover.

                         (ix) Each penetration of the internal floating
                    roof that allows for passage of a ladder shall have a
                    gasketed sliding cover.

                    (2)  An external floating roof.  An external floating
               roof means a pontoon-type or double-deck type cover that
               rests on the liquid surface in a vessel with no fixed roof.
               Each external floating roof must meet the following
               specifications:

                         (i)  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.

                              (A)  The primary seal shall be either a
                         mechanical shoe seal or a liquid-mounted seal
                         designed to prevent liquid capillary action.
                         Except as provided in Rule 260.113b(b)(4), the
                         seal shall completely cover the annular space
                         between the edge of the floating roof and tank
                         wall.

                              (B)  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 except as allowed in Rule
                         260.113b(b)(4).

                         (ii) 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 when 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 legs 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.

                         (iii)The roof shall be floating on the liquid at
                    all times (i.e., off the roof leg supports) except
                    during initial fill until the roof is lifted off leg
                    supports and 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.

                    (3)  A closed vent system and control device meeting
               the following specifications:

                         (i)  The closed vents system shall be designed to
                    collect all VOC vapors and gases discharged from the
                    storage vessel and operated with no detectable
                    emissions as indicated by an instrument reading of less
                    than 500 ppm above background and visual inspections,
                    as determined in Part 60, Subpart VV, 60.485(b).

                         (ii) The control device shall be designed and
                    operated to reduce inlet VOC emissions by 95 percent or
                    greater.  If a flare is used as the control device, it
                    shall meet the specifications described in the General
                    Control Device requirements (60.18) of the General
                    Provisions.

                    (4)  A system equivalent to those described in
               Subsections (a)(1), (a)(2), or (a)(3) of this rule as
               provided in Rule 260.114b of this subpart.

               (b)  The owner or operator of each storage vessel with a
          design capacity greater than or equal to 75 m3 (19,810 gal) which
          contains a VOL that, as stored, has a maximum true vapor pressure
          greater than or equal to 76.6 kPa (11.1 psia) shall equip each
          storage vessel with one of the following:

                    (1)  A closed vent system and control device as
               specified in Rule 260.112b(a)(3).

                    (2)  A system equivalent to that described in
               Subsection (b)(1) as provided in Rule 260.114b of this
               subpart.


               RULE 260.113b. TESTING AND PROCEDURES  (Rev. Effect.
          10/16/90)

               The owner or operator of each storage vessel as specified in
          Rule 260.112b(a) shall meet the requirements of Sections (a),
          (b), or (c) of this rule.  The applicable section for a
          particular storage vessel depends on the control equipment
          installed to meet the requirements of Rule 260.112b.

               (a)  After installing the control equipment required to meet
          Rule 260.112b(a)(1) (permanently affixed roof and internal
          floating roof), each owner or operator shall:

                    (1)  Visually inspect the internal floating roof, the
               primary seal, and the secondary seal (if one is in service),
               prior to filling the storage vessel with VOL.  If there are
               holes, tears, or other openings in the primary seal, the
               secondary seal, or the seal fabric or defects in the
               internal floating roof, or both, the owner or operator shall
               repair the items before filling the storage vessel.

                    (2)  For vessels equipped with a liquid-mounted or
               mechanical shoe primary seal, visually inspect the internal
               floating roof and the primary seal or the secondary seal (if
               one is in service) through manholes and roof hatches on the
               fixed roof at least once every 12 months after initial fill.
               If the internal floating roof is not resting on the surface
               of the VOL inside the storage vessel, or there is liquid
               accumulated on the roof, or the seal is detached, or there
               are holes or tears in the seal fabric, the owner or operator
               shall repair the items or empty and remove the storage
               vessel from service within 45 days.  If a failure that is
               detected during inspections required in this section cannot
               be repaired within 45 days and if the vessel cannot be
               emptied within 45 days, a 30-day extension may be requested
               from the Control Officer in the inspection report required
               in Rule 260.115b(a)(3).  Such a request for an extension
               must document that alternate storage capacity is unavailable
               and specify a schedule of actions the company will take that
               will assure that the control equipment will be repaired or
               the vessel will be emptied as soon as possible.

                    (3)  For vessels equipped with a double-seal system as
               specified in Rule 260.112b(a)(1)(ii)(B):

                         (i)  Visually inspect the vessel as specified in
                    Subsection (a)(4) of this rule at least every 5 years;
                    or

                         (ii) Visually inspect the vessel as specified in
                    Subsection (a)(2) of this rule.

                    (4)  Visually inspect the internal floating roof, the
               primary seal, the secondary seal (if one is in service),
               gaskets, slotted membranes (if any), and sleeve seals (if
               any) each time the storage vessel is emptied and degassed.
               If the internal floating roof has defects, the primary seal
               has holes, tears, or other openings in the seal or the seal
               fabric, or the secondary seal has holes, tears, or other
               openings in the seal or the seal fabric, or the gaskets no
               longer close off the liquid surfaces from the atmosphere, or
               the slotted membrane has more than 10 percent open area, the
               owner or operator shall repair the items as necessary so
               that none of the conditions specified in this section exist
               before refilling the storage vessel with VOL.  In no event
               shall inspections conducted in accordance with this
               provision occur at intervals greater than 10 years in the
               case of vessels conducting the annual visual inspection as
               specified in Subsections (a)(2) and (a)(3)(ii) of this rule
               and at intervals no greater than 5 years in the case of
               vessels specified in Subsection (a)(3)(i) of this rule.

                    (5)  Notify the Control Officer in writing at least 30
               days prior to the filling or refilling of each storage
               vessel for which an inspection is required by Subsections
               (a)(1) and (a)(4) of this rule to afford the Control Officer
               the opportunity to have an observer present.  If the
               inspection required by Subsection (a)(4) of this rule is not
               planned and the owner or operator could not have known about
               the inspection 30 days in advance of refilling the tank, the
               owner or operator shall notify the Control Officer at least
               7 days prior to the refilling of the storage vessel.
               Notification shall be made by telephone immediately followed
               by written documentation demonstrating why the inspection
               was unplanned.  Alternatively, this notification including
               the written documentation may be made in writing and sent by
               express mail so that it is received by the Control Officer
               at least 7 days prior to  the refilling.

               (b)  After installing the control equipment required to meet
          Rule 260.112b(a)(2) (external floating roof), the owner or
          operator shall:

                    (1)  Determine the gap areas and maximum gap widths,
               between the primary seal and the wall of the storage vessel
               and between the secondary seal and the wall of the storage
               vessel according to the following frequency.

                         (i)  Measurements of gaps between the tank wall
                    and the primary seal (seal gaps) shall be performed
                    during the hydrostatic testing of the vessel or within
                    60 days of the initial fill with VOL and at least once
                    every 5 years thereafter.

                         (ii) Measurements of gaps between the tank wall
                    and the secondary seal shall be performed within 60
                    days of the initial fill with VOL and at least once per
                    year thereafter.

                         (iii)If any source ceases to store VOL for a
                    period of 1-year or more, subsequent introduction of
                    VOL into the vessel shall be considered an initial fill
                    for the purposes of Subsections (b)(1)(i) and
                    (b)(1)(ii) of this rule.

                    (2)  Determine gap widths and areas in the primary and
               secondary seals individually by the following procedures:

                         (i)  Measure seal gaps, if any, at one or more
                    floating roof levels when the roof is floating off the
                    roof leg supports.

                         (ii) Measure seal gaps around the entire
                    circumference of the tank in each place where a 0.32 cm
                    (0.13 in) diameter uniform probe passes freely (without
                    forcing or binding against seal) between the seal and
                    the wall of the storage vessel and measure the
                    circumferential distance of each such location.

                         (iii)The total surface area of each gap described
                    in Subsection (b)(2)(ii) of this rule shall be
                    determined by using probes of various widths to measure
                    accurately the actual distance from the tank wall to
                    the seal and multiplying each such width by its
                    respective circumferential distance.

                    (3)  Add the gap surface area of each gap location for
               the primary seal and the secondary seal individually and
               divide the sum for each seal by the nominal diameter of the
               tank and compare each ratio to the respective standards in
               Subsection (b)(4) of this  rule.

                    (4)  Make necessary repairs or empty the storage vessel
               within 45 days of identification in any inspection for seals
               not meeting the requirements listed in Subsections (b)(4)(i)
               and (ii) of this rule.

                         (i)  The accumulated area of gaps between the tank
                    wall and the mechanical shoe or liquid-mounted primary
                    seal shall not exceed 212 cm2 per meter (10.0 in2 per
                    foot) of tank diameter, and the width of any portion of
                    any gap shall not exceed 3.81 cm (1.5 in).

                              (A)  One end of the mechanical shoe is to
                         extend into the stored liquid, and the other end
                         is to extend a minimum vertical distance of 61 cm
                         (24.0 in) above the stored liquid surface.

                              (B)  There are to be no holes, tears, or
                         other openings in the shoe, seal fabric, or seal
                         envelope.

                         (ii) The secondary seal is to meet the following
                    requirements:

                              (A)  The secondary seal is to be installed
                         above the primary seal so that it completely
                         covers the space between the roof edge and the
                         tank wall except as provided in Subsection
                         (b)(2)(iii) of this rule.

                              (B)  The accumulated area of gaps between the
                         tank wall and the secondary seal shall not exceed
                         21.2 cm2 per meter (1.0 in2 per foot) of tank
                         diameter, and the width of any portion of any gap
                         shall not exceed 1.27 cm (0.5 in).

                              (C)  There are to be no holes, tears, or
                         other openings in the seal or seal fabric.

                         (iii)If a failure that is detected during
                    inspections required in Subsection (b)(1) of Rule
                    260.113b(b) cannot be repaired within 45 days and if
                    the vessel cannot be emptied within 45 days, a 30-day
                    extension may be requested from the Control Officer in
                    the inspection report required by Rule 260.115b(b)(4).
                    Such extension request must include a demonstration of
                    unavailability of alternate storage capacity and a
                    specification of a schedule that will assure that the
                    control equipment will be repaired or the vessel will
                    be emptied as soon as possible.

                    (5)  Notify the Control Officer 30 days in  advance of
               any gap measurements required by Subsection (b)(1) of this
               rule to afford the Control Officer the opportunity to have
               an observer present.

                    (6)  Visually inspect the external floating roof, the
               primary seal, secondary seal, and fittings each time the
               vessel is emptied and degassed.

                         (i)  If the external floating roof has defects,
                    the primary seal has holes, tears, or other openings in
                    the seal or the seal fabric, or the secondary seal has
                    holes, tears, or other openings in the seal or the seal
                    fabric, the owner or operator shall repair the items as
                    necessary so that none of the conditions specified in
                    this section exist before filling or refilling the
                    storage vessel with VOL.

                         (ii) For all the inspections required by
                    Subsection (b)(6) of this rule, the owner or operator
                    shall notify the Control Officer in writing at least 30
                    days prior to the filling or refilling of each storage
                    vessel to afford the Control Officer the opportunity to
                    inspect the storage vessel prior to refilling.  If the
                    inspection required by Subsection (b)(6) of this rule
                    is not planned and the owner or operator could not have
                    known about the inspection 30 days in advance of
                    refilling the tank, the owner or operator shall notify
                    the Control Officer at least 7 days prior to the
                    refilling of the storage vessel.  Notification shall be
                    made by telephone immediately followed by written
                    documentation demonstrating why the inspection was
                    unplanned.  Alternatively, this notification including
                    the written documentation may be made in writing and
                    sent by express mail so that it is received by the
                    Control Officer at least 7 days prior to the refilling.

               (c)  The owner or operator of each source that is equipped
          with a closed vent system and control device as required in Rule
          260.112b(a)(3) or (b)(2) (other than a flare) is exempt from Rule
          260.8 of the General Provisions and shall meet the following
          requirements:

                    (1)  Submit for approval by the Administrator as an
               attachment to the notification required by Rule 260.7(a)(1)
               or, if the facility is exempt from Rule 260.7(a)(1), as an
               attachment to the notification required by Rule 260.7(a)(2),
               an operating plan containing the information listed below.

                         (i)  Documentation demonstrating that the control
                    device will achieve the required control efficiency
                    during maximum loading conditions.  This documentation
                    is to include a description of the gas stream which
                    enters the control device, including flow and VOC
                    content under varying liquid level conditions (dynamic
                    and static) and manufacturer's design specifications
                    for the control device.  If the control device or the
                    closed vent capture system receives vapors, gases, or
                    liquids other than fuels from sources that are not
                    designated sources under this subpart, the efficiency
                    demonstration is to include consideration of all
                    vapors, gases, and liquids received by the closed vent
                    capture system and control device.  If an enclosed com-
                    bustion device with a minimum residence time of 0.75
                    seconds and a minimum temperature of 816 C (1500 F)
                    is used to meet the 95 percent requirement, docu-
                    mentation that those conditions will exist is
                    sufficient to meet the requirements of this section.
                         (ii) A description of the parameter or parameters
                    to be monitored to ensure that the control device will
                    be operated in conformance with its design and an
                    explanation of the criteria used for selection of that
                    parameter (or parameters).

                    (2)  Operate the closed vent system and control device
               and monitor the parameters of the closed vent system and
               control device in accordance with the operating plan sub-
               mitted to the Control Officer in accordance with Subsection
               (c)(1) of this rule, unless the plan was modified by the
               Control Officer during the review process.  In this case,
               the modified plan applies.

               (d)  The owner or operator of each source that is equipped
          with a closed vent system and a flare to meet the requirements of
          Rule 260.112b(a)(3) or (b)(2) shall meet the requirements as
          specified in the General Control Device requirements, 60.18(e)
          and (f).


               RULE 260.114b. ALTERNATIVE MEANS OF EMISSION LIMITATION

               (a)  If, in the Administrator's judgment, an alternative
          means of emission limitation will achieve a reduction in
          emissions at least equivalent to the reduction in emissions
          achieved by any requirement in Rule 260.112b, the Administrator
          will publish in the Federal Register a notice permitting the use
          of the alternative means for purposes of compliance with that
          requirement.

               (b)  Any notice under Section (a) of this rule will be
          published only after notice and an opportunity for a hearing.

               (c)  Any person seeking permission under this rule shall
          submit to the Administrator a written application including:

                    (1)  An actual emissions test that uses a full-sized or
               scale-model storage vessel that accurately collects and
               measures all VOC emissions from a given control device and
               that accurately simulates wind and accounts for other
               emission variables such as temperature and barometric
               pressure.

                    (2)  An engineering evaluation that the Administrator
               determines is an accurate method of determining equivalence.

               (d)  The Administrator may condition the permission on
          requirements that may be necessary to ensure operation and
          maintenance to achieve the same emissions reduction as specified
          in Rule 260.112b.





               RULE 260.115b. REPORTING AND RECORDKEEPING
                              REQUIREMENTS

               The owner or operator of each storage vessel as specified in
          Rule 260.112b(a) shall keep records and furnish reports as
          required by Sections (a), (b) or (c) of this rule depending upon
          the control equipment installed to meet the requirements of Rule
          260.112b.  The owner or operator shall keep copies of all reports
          and records required by this rule, except for the record required
          by Subsection (c)(1) for at least 2 years.  The record required
          by Subsection (c)(1) will be kept for the life of the control
          equipment.

               (a)  After installing control equipment in accordance with
          Rule 260.112b(a)(1) (fixed roof and internal floating roof), the
          owner or operator shall meet the following requirements:
                    (1)  Furnish the Control Officer with a report that
               describes the control equipment and certifies that the
               control equipment meets the specifications of Rules
               260.112b(a)(1) and 260.113b(a)(1).  This report shall be an
               attachment to the notification required by Rule 260.7(a)(3).

                    (2)  Keep a record of each inspection performed as
               required by Rule 260.113b   (a)(1), (a)(2), (a)(3), and
               (a)(4).  Each record shall identify the storage vessel on
               which the inspection was performed and shall contain the
               date the vessel was inspected and the observed condition of
               each component of the control equipment (seals, internal
               floating roof, and fittings).

                    (3)  If any of the conditions described in Rule
               260.113b(a)(2) are detected during the annual visual
               inspection required by Rule 260.113b(a)(2), a report shall
               be furnished to the Control Officer within 30 days of the
               inspection.  Each report shall identify the storage vessel,
               the nature of the defects, and the date the storage vessel
               was emptied or the nature of and date the repair was made.

                    (4)  After each inspection required by Rule
               260.113b(a)(3) that finds holes or tears in the seal or seal
               fabric, or defects in the internal floating roof, or other
               control equipment defects listed in Rule 260.113b(a)(3)(ii),
               a report shall be furnished to the Control Officer within 30
               days of the inspection.  The report shall identify the
               storage vessel and the reason it did not meet the
               specifications of Rules 260.112b(a)(1) or 260.113b(a)(3) and
               list each repair made.

               (b)  After installing control equipment in accordance with
          Rule 260.112b(a)(2) (external floating roof), the owner or
          operator shall meet the following requirements.

                    (1)  Furnish the Control Officer with a report that
               describes the control equipment and certifies that the
               control equipment meets the specifications of Rules
               260.112b(a)(2) and 260.113b(b)(2), (b)(3), and (b)(4).  This
               report shall be an attachment to the notification required
               by Rule 260.7(a)(3).

                    (2)  Within 60 days of performing the seal gap
               measurements required by Rule 260.113b(b)(1), furnish the
               Control Officer with a report that contains:

                         (i)  The date of measurement.

                         (ii) The raw data obtained in the measurement.

                         (iii)The calculations described in Rule
                    260.113b(b)(2) and (b)(3).

                    (3)  Keep a record of each gap measurement performed as
               required by Rule 260.113b(b).  Each record shall identify
               the storage vessel in which the measurement was performed
               and shall contain.

                         (i)  The date of measurement.

                         (ii) The raw data obtained in the measurement.

                         (iii)The calculations described in Rule
                    260.113b(b)(2) and (b)(3).

                    (4)  After each seal gap measurement that detects gaps
               exceeding the limitations specified by Rule 260.113b(b)(4),
               submit a report to the Control Officer within 30 days of the
               inspection.  The report will identify the vessel and contain
               the information specified in Subsection (b)(2) of this rule
               and the date the vessel was emptied or the repairs made and
               date of repair.

               (c)  After installing control equipment in accordance with
          Rule 260.112b(a)(3) or (b)(1) (closed vent system and control
          device other than a flare), the owner or operator shall keep the
          following records.

                    (1)  A copy of the operating plan.

                    (2)  A record of the measured values of the parameters
               monitored in accordance with Rule 260.113b(c)(2).

               (d)  After installing a closed vent system and flare to
          comply with Rule 260.112b, the owner or operator shall meet the
          following requirements.

                    (1)  A report containing the measurements required by
               60.18(f)(1), (2), (3), (4), (5), and (6) of 40 CFR Part 60
               shall be furnished to the Control Officer as required by
               Rule 260.8 of the General Provisions.  This report shall be
               submitted within 6 months of the initial startup date.

                    (2)  Records shall be kept of all periods of operation
               during which the flare pilot flame is absent.

                    (3)  Semi-annual reports of all periods recorded under
               Rule 260.115b(d)(2) in which the pilot flame was absent
               shall be furnished to the Control Officer.

               RULE 260.116b. MONITORING OF OPERATIONS

               (a)  The owner or operator shall keep copies of all records
          required by this rule, except for the record required by Section
          (b) of this rule, for at least 2 years.  The record required by
          Section (b) of this rule will be kept for the life of the source.

               (b)  The owner or operator of each storage vessel as
          specified in Rule 260.110b(a) shall keep readily accessible
          records showing the dimension of the storage vessel and an
          analysis showing the capacity of the storage vessel.  Each
          storage vessel with a design capacity less than 75 m3 (19,813
          gal) is subject to no provision of this subpart other than those
          required by this section.

               (c)  Except as provided in Sections (f) and (g) of this
          rule, the owner or operator of each storage vessel either with a
          design capacity greater than or equal to 151 m3 (39,890 gal)
          storing a liquid with a maximum true vapor pressure greater than
          or equal to 3.5 kPa (0.5 psia) or with a design capacity greater
          than or equal to 75 m3 (19,810 gal) but less than 151 m3 (39,890
          gal) storing a liquid with a maximum true vapor pressure greater
          than or equal to 15.0 kPa (2.2 psia) shall maintain a record of
          the VOL stored, the period of storage, and the maximum true vapor
          pressure of that VOL during the respective storage period.

               (d)  Except as provided in Section (g) of this rule, the
          owner or operator of each storage vessel either with a design
          capacity greater than or equal to 151 m3 (39,890 gal) storing a
          liquid with a maximum true vapor pressure that is normally less
          than 5.2 kPa (0.75 psia) or with a design capacity greater than
          or equal to 75 m3 (19,810 gal) but less than 151 m3 (39,890 gal)
          storing a liquid with a maximum true vapor pressure that is
          normally less than 27.6 kPa (4.0 psia) shall notify the Control
          Officer within 30 days when the maximum true vapor pressure of
          the liquid exceeds the respective maximum true vapor pressure
          values for each volume range.

               (e)  Available data on the storage temperature may be used
          to determine the maximum true vapor pressure as determined below.

                    (1)  For vessels operated above or below ambient
               temperatures, the maximum true vapor pressure is calculated
               based upon the highest expected calendar-month average of
               the storage temperature.  For vessels operated at ambient
               temperatures, the maximum true vapor pressure is calculated
               based upon the maximum local monthly average ambient
               temperature as reported by the National Weather Service.

                    (2)  For crude oil or refined petroleum products the
               vapor pressure may be obtained by the following:

                         (i)  Available data on the Reid vapor pressure and
                    the maximum expected storage temperature based on the
                    highest expected calendar-month average temperature of
                    the stored product may be used to determine the maximum
                    true vapor pressure from nomographs contained in API
                    Bulletin 2517 (incorporated by reference - see 60.17),
                    unless the Control Officer specifically requests that
                    the liquid be sampled, the actual storage temperature
                    determined, and the Reid vapor pressure determined from
                    the sample(s),

                         (ii) The true vapor pressure of each type of
                    crude oil with a Reid vapor pressure less than 13.8 kPa
                    (2.0 psia) or with physical properties that preclude
                    determination by the recommended method is to be
                    determined from available data and recorded if the
                    estimated maximum true vapor pressure is greater than
                    3.5 kPa (0.5 psia).

                    (3)  For other liquids, the vapor pressure:

                         (i)  May be obtained from standard reference
                    texts, or

                         (ii) Determined by ASTM Method D2879-83
                    (incorporated by reference - see 60.17); or

                         (iii)Measured by an appropriate method approved by
                    the Administrator; or

                         (iv) Calculated by an appropriate method approved
                    by the Administrator.

               (f)  The owner or operator of each vessel storing a waste
          mixture of indeterminate or variable composition shall be subject
          to the following requirements.

                    (1)  Prior to the initial filling of the vessel, the
               highest maximum true vapor pressure for the range of
               anticipated liquid compositions to be stored will be
               determined using the methods described in Section (e) of
               this rule.

                    (2)  For vessels in which the vapor pressure of the
               anticipated liquid composition is above the cutoff for
               monitoring but below the cutoff for controls as defined in
               Rule 260.112b(a), an initial physical test of the vapor
               pressure is required; and a physical test at least once
               every 6 months thereafter is required as determined by the
               following methods:

                         (i)  ASTM Method D2879-83 (incorporated by
                    reference - see 60.17); or

                         (ii) ASTM Method D323-82 (incorporated by
                    reference - see 60.17); or

                         (iii)As measured by an appropriate method as
                    approved by the Administrator.

               (g)  The owner or operator of each vessel equipped with a
          closed vent system and control device meeting the specifications
          of Rule 260.112b is exempt from the requirements of Sections (c)
          and (d) of this rule.


          NOTE:     DELEGATION OF AUTHORITY (40 CFR Part 60)

               (a)  In delegating implementation and enforcement authority
          to a State under Section 111(c) of the Act, the authorities
          contained in paragraph (b) of this Section shall be retained by
          the Administrator and not transferred to a State.

               (b)  Authorities which will not be delegated to States:
          Sections 60.111b(f)(4), 60.113b(c)(1), 60.114b,
          60.116b(e)(3)(iii), 60.116b(e)(3)(iv), and 60.116b(f)(2)(iii).