KERAPCD RULE 411 STORAGE OF ORGANIC LIQUIDS          
LAST REVISED 04/06/95
          
          
          RULE 411 Storage of Organic Liquids - Adopted 4/18/72,
                   Amended 1/9/79, 6/29/79, 11/27/79, 4/5/82,
                   Renumbered 5/89, Amended 5/6/91, 4/6/95

          I.    Applicability

                This Rule applies to equipment used to store organic
                liquids and petroleum distillates, with a true vapor
                pressure of greater than 1.5 psia.

          II.   Definitions

                A.  Emergency Standby Tank:  Tank not used (filled or
                    partially filled) more than twice in any twelve-month
                    period.

                B.  Gas Leak:  Reading as methane on a portable hydrocarbon
                    detection instrument in excess of 10,000 ppm above
                    background when measured with an instrument calibrated
                    with methane and conducted in accordance with U.S. EPA
                    Method 21.

                C.  Gas-Tight:  Any emission of less than or equal to 
                    10,000 ppm as methane measured with an instrument 
                    calibrated with methane and conducted in accordance 
                    with U.S. EPA Method 21.

                D.  Gasoline:  Organic liquid used as motor fuel with true
                    vapor pressure of greater than 1.5 psia.

                E.  Metallic-Shoe Type Seal:  Floating roof tank seal with
                    typical geometry and components as shown on Figure 1,
                    Page 411-10.

                F.  Organic Liquid:  Any liquid containing VOC's and having
                    a true vapor pressure (TVP) greater than 1.5 psia at
                    actual storage conditions.

                G.  Petroleum Distillate:  The product of a distillation or
                    condensation process obtained by condensing vapors for
                    the purpose of purification, fractionation or the
                    formation of new substances.

                H.  Resilient-Toroid Type Seal:  Floating roof tank seal
                    with typical geometry and components as shown on
                    Figure 2, Page 411-11.

                I.  Roof Drain:  Any drain located in roof of tank opening
                    directly into organic liquid content of tank.

                J.  Tank:  Any stationary storage tank, reservoir or other
                    container having a capacity of 251 gallons, or greater.

                K.  Visible Gap:  Gap between tank shell and seal exceeding
                    1.5 mm (0.06 in.).

                L.  Volatile Organic Compound (VOC):  Any compound
                    containing at least one atom of carbon except for the
                    following exempt compounds:

                         methane,
                         carbon Monoxide,
                         carbon Dioxide,
                         carbonic Acid,
                         metallic Carbides or Carbonates,
                         ammonium Carbonates,
                         methylene Chloride,
                         methyl Chloroform (1,1,1-trichloroethane),
                         CFC-113 (trichlorotrifluoroethane),
                         CFC-11 (trichlorofluoromethane),
                         CFC-12 (dichlorodifluoromethane),
                         CFC-22 (trifluoromethane),
                         CFC-114 (dichlorotetrafluoroethane),
                         CFC-115 (chloropentafluoroethane),
                         HCFC-123 (dichlorotrifluoroethane),
                         HFC-134a (tetrafluoroethane),
                         HCFC-141b (dichlorofluoroethane), and
                         HCFC-142b (chlorodifluoroethane).

                M.  "Zero" gap:  No gap between tank shell and seal
                    exceeding 1.5 mm (0.06 in.), and cumulative length of
                    all gaps exceeding 0.5 mm (0.02 in.) not being more 
                    than 5 percent of tank circumference, excluding gaps 
                    less than 5 cm (1.79 in.) from vertical seams.

          III.  Exemptions

                A.  Provisions of this Rule shall not apply to tanks,
                    reservoirs or other containers which are pressure
                    vessels maintaining working pressures sufficient at
                    all times to prevent organic liquid or VOC loss to
                    the atmosphere.

                B.  Requirements of Subsection IV.A., IV.B. and IV.C. shall
                    not apply to:

                    1.  Fixed or floating roof tanks, designated for
                        emergency standby, in existence prior to May 1, 1979
                        storing exclusively petroleum distillates.  Prior to
                        return to emergency standby status, each tank shall
                        be thoroughly drained.  Each use of tank shall not
                        exceed 30 days.  After tank has been used (filled or
                        partially filled) and draining of tank has begun,
                        any further filling of tank shall constitute a
                        separate use of tank. Each fixed roof emergency
                        standby tank shall be equipped with pressure relief
                        device set to within ten percent of maximum
                        allowable working pressure of tank.

                    2.  Portable temporary tanks, with capacities of
                        21,000 gallons (500 Barrels), or less left on site
                        for six months or less.

          IV.   Requirements

                A.  Floating Roof Tanks

                    1.  A floating roof tank shall not be used to store
                        organic liquid having a true vapor pressure of
                        11 psia, or greater under storage conditions.

                    2.  No person shall place, store or hold in any 
                        floating roof tank of 19,800 gallons (471 barrels), 
                        or greater, any organic liquid unless such tank is
                        equipped with:

                        a.  A floating roof, consisting of a pontoon type 
                            or double-deck type cover, resting on the 
                            surface of liquid contents; and

                        b.  A closure device between the tank shell and 
                            roof edge consisting of two seals, one above 
                            the other.  The lower one shall be referred 
                            to as the primary seal, and upper one shall 
                            be referred to as the secondary seal.

                    3.  Seal designs shall be submitted to the Control
                        Officer and not installed or used unless approved 
                        by the Control Officer as meeting criteria of
                        Subsections IV.A.3.a. through IV.A.3.d., as
                        applicable.

                        Seal designs other than those in
                        Subsections IV.A.3.a. through IV.A.3.d. may be
                        approved provided notice allowing use of such 
                        design has been published in the Federal Register 
                        pursuant to CFR 40 Part 60: Subpart Kb 
                        Paragraph 60.114b.

                        a.  Metallic-Shoe Type Seal on Welded Tank:

                            For a closure device on a welded tank shell
                            using a metallic-shoe type seal as its primary
                            seal:

                            1.  No gap between tank shell and primary seal
                                shall exceed 1 1/2 inches.  Cumulative
                                length of all gaps between tank shell and
                                primary seal greater than 1/2 inch shall 
                                not exceed 10 percent of tank circumference.
                                Cumulative length of all primary seal gaps
                                greater than 1/8 inch shall not exceed
                                30 percent of tank circumference.  No
                                continuous gap greater than 1/8 inch shall
                                exceed 10 percent of tank circumference.

                            2.  No gap between tank shell and secondary 
                                seal shall exceed 1/2 inch.  Cumulative 
                                length of all gaps between tank shell and 
                                secondary seal greater than 1/8 inch shall 
                                not exceed 5 percent of tank circumference.

                            3.  Metallic-shoe type seals shall be installed
                                so that one end of shoe extends into stored
                                liquid and other end extends a minimum
                                vertical distance of 24 inches above stored
                                liquid surface.

                            4.  Geometry of shoe shall be such that maximum
                                gap between shoe and tank shell is no
                                greater than double gap allowed by seal gap
                                criteria for a length of at least 18 inches
                                in vertical plane above liquid surface.

                            5.  There shall be no holes, tears, or openings
                                in  secondary seal or primary seal envelope
                                surrounding annular vapor space enclosed by
                                roof edge, stored liquid surface, shoe, and
                                seal fabric.

                            6.  Secondary seal shall allow easy insertion of
                                probes up to 1 1/2 inches in width to allow
                                measurement of gaps in primary seal.

                            7.  Secondary seal shall extend from roof to
                                tank shell and shall not be attached to
                                primary seal.

                        b.  Metallic-Shoe Type Seal on Riveted Tank:
    
                            For a closure device on a riveted tank shell
                            using a metallic-shoe type seal as its primary
                            seal:

                            1.  No gap between tank shell and primary seal
                                shall exceed 2 1/2 inches.  Cumulative
                                length of all primary seal gaps greater 
                                than 1 1/2 inch shall not exceed 10 percent 
                                of tank circumference.  Cumulative length of
                                all gaps between the tank shell and the
                                primary seal greater than 1/8 inch shall 
                                not exceed 30 percent of tank circumference.  
                                No continuous gap greater than 1/8 inch 
                                shall exceed 10 percent of tank 
                                circumference.

                            2.  No gap between tank shell and secondary seal
                                shall exceed 1/2 inch.  Cumulative length of
                                all gaps between tank shell and secondary
                                seal greater than 1/8 inch shall not exceed
                                5 percent of tank circumference.

                            3.  Metallic-shoe type seals shall be installed
                                so that one end of shoe extends into stored
                                liquid and other end extends a minimum
                                vertical distance of 24 inches above stored
                                liquid surface.  Geometry of shoe shall be
                                such that maximum gap between shoe and tank
                                shell is no greater than double gap allowed
                                by seal gap criteria for a length of at
                                least 18 inches in vertical plane.

                            4.  There shall be no holes, tears, or openings
                                in seal(s) envelope surrounding annular
                                vapor space enclosed by roof edge, stored
                                liquid surface, shoe, and seal fabric.

                            5.  Any secondary seal shall allow easy
                                insertion of probes up to 2 1/2 inches in
                                width to allow measurement of gaps in
                                primary seal.

                            6.  Any secondary seal shall extend from roof to
                                tank shell and shall not be attached to
                                primary seal.

                        c.  Resilient-Toroid Type Seal On Any Tank:

                            For a closure device on a tank using a
                            resilient-toroid type seal:
                           
                            1.  No gap between tank shell and primary seal
                                shall exceed 1/2 inch.  Cumulative length of
                                all primary seal gaps greater than 1/8 inch
                                shall not exceed 30 percent of tank
                                circumference.  No continuous gap greater
                                than 1/8 inch shall exceed 10 percent of
                                tank circumference.

                            2.  No gap between tank shell and secondary seal
                                shall exceed 1/2 inch.  Cumulative length of
                                all gaps between tank shell and secondary
                                seal greater than 1/8 inch shall not exceed
                                5 percent of the tank circumference.

                            3.  There shall be no holes, tears, or openings
                                in secondary seal or primary seal envelope
                                surrounding annual vapor space enclosed by
                                roof edge, seal fabric and secondary seal.

                            4.  Secondary seal shall allow easy insertion 
                                of probes up to 1/2 inch in width to allow
                                measurement of gaps in primary seal.

                            5.  Secondary seal shall extend from roof of
                                tank to shell and not be attached to 
                                primary seal.

                        d.  Following seal designs have been found to be
                            equivalent to seals meeting criteria of
                            Subsections IV.A.3.a. through IV.A.3.c.:

                            1.  Republic Fabricators, "Weather Guard Seal"
                                when installed and maintained with "zero"
                                gap; and

                            2.  HMT, "Dual/Multi Wiper Blade Seals" when
                                installed and maintained to meet gap
                                criteria for primary and secondary seals 
                                as described in Subsections IV.A.3.a. or
                                IV.A.3.b.

                    4.  Inspection of Seals:

                        Primary seal envelope shall be made available for
                        unobstructed inspection by District on annual basis
                        at locations selected along its circumference at
                        random.  For riveted tanks with toroid-type seals, 
                        a minimum of eight locations shall be made 
                        available; for other tanks, a minimum of 
                        four locations shall be made available.  If 
                        District suspects non-conformance with this Rule, 
                        District may require such further unobstructed 
                        inspection of primary seal as may be necessary to 
                        determine seal condition for its entire 
                        circumference.

                    5.  Openings:

                        All openings in roof used for sampling or gauging,
                        except pressure-vacuum valves which shall be set to
                        within ten percent of maximum allowable working
                        pressure of roof, shall provide a projection below
                        liquid surface to prevent belching of liquid and to
                        prevent entrained or formed organic vapor from
                        escaping from liquid contents of tank and shall be
                        equipped with a cover, seal, or lid.  Such covers,
                        seals, or lids shall, at all times, be in closed
                        position with no visible gaps and be gas-tight,
                        except when device or appurtenance is in use.

                    6.  Roof Drain:

                        Any roof drain shall be provided with slotted
                        membrane fabric cover, or equivalent, covering 
                        at least nine-tenths of opening area.

                B.  Fixed Roof Tanks with Internal Floating Roof

                    1.  A fixed roof tank with an internal floating roof
                        shall not be used to store organic liquid having 
                        a true vapor pressure of 11 psia, or greater under
                        storage conditions.

                    2.  No person shall place, store or hold in any fixed
                        roof tank with an internal floating roof and a
                        capacity of 19,800 gallons (471 barrels), or greater
                        any organic liquid, or petroleum distillate unless
                        internal floating roof is equipped with a closure
                        device meeting requirements of Subsection IV.A.
                   
                    3.  A fixed roof tank with internal floating type cover
                        shall be made available for inspection by District
                        upon request.

                    4.  Following seal designs for internal floating roofs
                        have been found to be equivalent to seals meeting
                        criteria of Subsection IV.A.:

                        a) Ultraflote "Single Ultraseal" when installed 
                           and maintained with "zero" gap; and

                        b) Ultraflote "Dual Ultraseal" when installed and
                           maintained to meet gap criterial for primary
                           and secondary seals as described in
                           Subsections IV.A.3.a. or IV.A.3.b.

                C.  Fixed Roof Tank with Vapor Recovery System

                    1.  No person shall place, store or hold in any fixed
                        roof tank of 19,800 gallons (471 barrels), or
                        greater capacity any organic liquid, or petroleum
                        distillate unless tank is equipped with vapor
                        recovery system. System shall be designed to 
                        collect all VOC's, and shall include system 
                        recovering or disposing of VOC's to prevent 
                        emission  to the atmosphere at a control 
                        efficiency of at least 95 percent by weight.

                    2.  Any tank gauging or sampling device on a tank 
                        vented to a vapor recovery system shall be 
                        equipped with gas-tight cover closed at all times 
                        except during gauging or sampling.

                    3.  All piping, valves and fittings shall be 
                        constructed and maintained in gas-tight condition.

                D.  Aboveground Tank Containing Gasoline

                    A person shall not place, store, or hold in any
                    aboveground tank of 19,800 gallons (471 barrels), or
                    less capacity any gasoline unless such tank is equipped
                    with a pressure relief device set to within 10 percent
                    of maximum allowable working pressure of container or 
                    is equipped with a vapor loss control device complying 
                    with requirements of Subsection IV.C.

          V.    Administrative Requirements

                A.  Record Keeping

                    1.  A person whose tanks are subject to requirements of
                        this Rule shall keep an accurate record of liquids
                        stored in each container, storage temperature and
                        Reid vapor pressure of such liquids.
                   
                    2.  A person whose emergency standby tanks are exempt
                        from requirements of Subsections IV.A., IV.B., or
                        IV.C. of this Rule shall maintain records required
                        in Subsection V.A.1. and date(s) liquid is first
                        introduced to each tank and date(s) tank is fully
                        drained.  Such records shall be submitted to Control
                        Officer 60 days prior to permit renewal.

                    3.  A person whose portable temporary tanks are exempt
                        by Subsection III.B.2. shall maintain records
                        required in V.A.1. in addition to tank capacity,
                        date(s) liquid is first introduced, and date(s) 
                        tank is fully drained and moved off-site.  Such 
                        records shall be submitted to Control Officer 
                        within 45 days of tank removal.

                B.  Test Methods

                    1.  Analysis of halogenated exempt compounds shall 
                        be by CARB Method 432.

                    2.  True vapor pressure shall be measured using Reid
                        vapor pressure ASTM Method No. D-323-82 modified by
                        maintaining hot water bath at storage temperature.
                        Where storage temperature is above 100°F, true vapor
                        pressure may be determined by Reid Vapor pressure 
                        at 100°F and California Air Resources Board-approved
                        calculations.  An organic liquid listed in Table I,
                        Page 411-9 shall be deemed in compliance with
                        appropriate vapor pressure limits for liquid,
                        provided actual storage temperature does not exceed
                        corresponding maximum temperature listed.

                    3.  Control efficiency, as used in Subsection IV.C.,
                        shall be determined by CARB Method 202 or 203, as
                        applicable.

                    4.  Efficiency of any VOC destruction device shall be
                        measured by U.S. EPA Method 25, 25A, or 25B, as
                        applicable, and analysis of halogenated exempt
                        compounds shall be by CARB Method 422.
               
                                      Table I
                                  Organic Liquids
                 Maximum Storage Temperatures For Organic Liquids
                        For Purposes Of Subsection V.B.2.

                             Gravity   Initial       Vapor Pressure
                              °API     Boiling            Limit
                                       Point°F   0.5 (psia) 1.5 (psia)

          Organic Liquid

          Middle Distillates                  Maximum Storage Temp.(°F)

          Kerosene             42.5      350         195        250
          Diesel               36.4      372         230        290
          Gas Oil              26.2      390         249        310
          Stove Oil            23        421         275        340

          Jet Fuels

          JP-1                 43.1      330         165        230
          JP-3                 54.7      110         ---         25
          JP-4                 51.5      150          20         68
          JP-5                 39.6      355         205        260
          JP-7                 44.50     360         205        260
          JP-8                 37-51     ---         167        222

          Fuel Oil

          No. 1                42.5      350         195        250
          No. 2                36.4      372         230        290
          No. 3                26.2      390         249        310
          No. 4                23        421         275        340
          No. 5                19.9      560         380        465
          Residual             19.27     ---         405        ---
          No. 6                16.2      625         450        ---

          Asphalts

           60 - 100 pen.       ---       ---         490        550
          120 - 150 pen.       ---       ---         450        500
          200 - 300 pen.       ---       ---         360        420


        IN THE HARD COPY VERSION OF THE KERN COUNTY APCD DISTRICT RULE BOOK
        THERE ARE TWO FIGURES WITH THE TITLES GIVEN BELOW.  IF A COPY OF 
        THESE FIGURES IS NEEDED, PLEASE CONTACT THE DISTRICT DIRECTLY.


                                     Figure 1
                             Metallic-Shoe-Type Seal

                                     Figure 2
                            Resilient-Toroid-Type Seal