MBUAPCD RULE 433 ORGANIC SOLVENT CLEANING                                    
LAST REVISED 06/15/94
                                    
                                    REGULATION IV
                                     PROHIBITIONS


          RULE 433    ORGANIC SOLVENT CLEANING



          Adopted 6-15-94


          PART 1  GENERAL...............................................2
                  
            1.1   Purpose...............................................2
                  
            1.2   Applicability.........................................2
                  
            1.3   Exemptions............................................2
                  
            1.4   Effective Dates.......................................3
                  
            1.5   References............................................3
                  

          PART 2  DEFINITIONS...........................................3
                  
            2.1   Air-Vapor Interface...................................3
                  
            2.2   Batch-loaded..........................................3
                  
            2.3   Cold Cleaner..........................................4
                  
            2.4   Condenser.............................................4
                  
            2.5   Condenser Flow Switch.................................4
                  
            2.6   Conveyorized Solvent Cleaner..........................4
                  
            2.7   Emissions Control Device..............................4
                  
            2.8   Emulsion..............................................4
                  
            2.9   Evaporation...........................................4
                  
            2.10  Evaporative Surface Area..............................5
                  
            2.11  Evaporative Surface Area (for Vapor Solvent Cleaner)..5
                  
            2.12  Evaporative Surface Area (for Conveyorized Solvent
                  Cleaner)..............................................5
                  
            2.13  Exempt Organic Compounds..............................5
                  
            2.14  Freeboard Height......................................6
                  
            2.15  Freeboard Ratio.......................................7
                  
            2.16  Initial Boiling Point.................................7
                  
            2.17  Leak..................................................7
                  
            2.18  Lip Exhaust...........................................7
                  
            2.19  Low Volatility Solvent................................7
                  
            2.20  Make-up Solvent.......................................7
                  
            2.21  Refrigerated Freeboard Chiller........................8
                  
            2.22  Remote Reservoir Cold Cleaner.........................8
                  
            2.23  Solvent...............................................8
                  
            2.24  Spray Safety Switch...................................8
                  
            2.25  Ultrasonics...........................................8
                  
            2.26  Vapor Level Control Thermostat........................8
                  
            2.27  Vapor Solvent Cleaner.................................8
                  
            2.28  Volatile Organic Compound (VOC).......................9
                  
            2.29  Volatile Solvent......................................9
                  
            2.30  Waste Solvent Residue.................................9
                  
            2.31  Wipe Cleaning.........................................9
                  
            2.32  Workload..............................................9
                  
            2.33  Workload Area.........................................9
                  

          PART 3  REQUIREMENTS AND STANDARDS............................9
                  9
            3.1   Operational Requirements..............................9
                  9
              3.1.1   All Cleaners......................................10
                      
              3.1.2   Additional Operational Requirements for
                      Batch-loaded and Conveyorized Vapor Cleaners......11
                      
            3.2   Equipment Requirements................................11
                  
              3.2.1   All cleaners......................................11
                      
              3.2.3   Additional Equipment Requirements for Cold 
                      Cleaners..........................................12
                      
              3.2.4   Additional Equipment Requirements for Batch-loaded
                      Vapor Cleaners....................................12
                      
              3.2.5   Additional Equipment Requirements for Conveyorized
                      Cold Cleaners.....................................13
                      
            3.3   Alternative Control Requirements......................14
                  
            3.4   Prohibitions..........................................15
                  

          PART 4  ADMINISTRATIVE REQUIREMENTS...........................15
                  
            4.1   Recordkeeping.........................................15
                  
            4.2   Recordkeeping Requirements for Emission Control Devices
                  
            4.3   Test Methods..........................................16
                  




          PART 1  GENERAL


          1.1   Purpose

            The purpose of this Rule is to limit emissions of volatile
            organic compounds (VOC) during solvent cleaning and degreasing
            operations.


          1.2   Applicability

            The provisions of this Rule shall apply to the operation of all
            cleaning devices using volatile organic compounds for solvent
            cleaning and degreasing.


          1.3   Exemptions

            1.3.1   Solvent cleaning operations using solvent (including
                    emulsions) containing no more than 2 percent of
                    volatile organic compounds by weight (as determined by
                    EPA Method 24) shall not be subject to the requirements
                    of this Rule.

            1.3.2   Cold cleaners with less than 1 square foot (929 square
                    centimeters)  of evaporative surface area are exempt
                    from the equipment requirements of Section  of this
                    Rule, except for the requirement that the cleaners be
                    covered when work is not being processed.

            1.3.3   Batch loaded vapor cleaners with less than 10.8 square
                    feet (1 square meter)  of evaporative surface area are
                    exempt from the requirements of Section  of this Rule.

            1.3.4   Conveyorized vapor cleaners with less than 21.5 square
                    feet (2 square meter)  of evaporative surface area are
                    exempt from the requirements of Section  of this Rule.


          1.4   Effective Dates

            The requirements of this Rule shall be effective on September
            15, 1994.  Other effective dates for specific requirements are
            given in Part 3.


          1.5   References

            The requirements of this Rule arise from the provisions of
            Section 182(b)(2) of the federal Clean Air Act as amended
            (Title 42 United States Code Section 7401 et seq.)




          PART 2  DEFINITIONS


          2.1   Air-Vapor Interface

            For vapor solvent cleaners, the top of the solvent-vapor layer,
            and the air touching this layer.  The effective top of the
            vapor layer may be determined as the maximum height at which
            condensation occurs on a cold metal object lowered into the
            vapor zone.


          2.2   Batch-loaded

            Material placed in a non-conveyorized container for cleaning
            which is removed after cleaning is complete.


          2.3   Cold Cleaner

            Any cleaner using solvent which is maintained below the initial
            boiling point temperature.  Such cleaners include, but are not
            limited to, spray sinks and batch-loaded dip tanks.


          2.4   Condenser

            A device, such as cooling coils, used to condense (liquify)
            solvent vapor.


          2.5   Condenser Flow Switch

            A safety switch connected to a thermostat which shuts off the
            sump heater if the condenser coolant is either not circulating
            or exceeds its designed operating temperature.


          2.6   Conveyorized Solvent Cleaner

            Any cleaner which uses a continuous, mechanical system for
            moving materials or parts to be cleaned into and out of a
            solvent liquid or vapor cleaning zone.


          2.7   Emissions Control Device

            A device which removes or destroys emissions of VOC to the
            atmosphere from the exhaust stream of a process.


          2.8   Emulsion

            A suspension of small droplets of one liquid in a second
            liquid.


          2.9   Evaporation

            To change into a vapor from a liquid state.


          061594                                               RULE 433:  1
                                    REGULATION IV
                                     PROHIBITIONS
          2.10  Evaporative Surface Area (for Cold Cleaner)

            The surface area of the top of the solvent.  For a remote
            reservoir cold cleaner, the surface area of the solvent sink or
            work area.


          2.11  Evaporative Surface Area (for Vapor Solvent Cleaner)

            The surface area of the top of the solvent vapor-air interface.


          2.12  Evaporative Surface Area (for Conveyorized Solvent Cleaner)

            2.12.1  Cold Cleaner:  The surface area of the top of the
                    solvent.

            2.12.2  Vapor Solvent Cleaner:  The surface area of the top of
                    the solvent vapor-air interface.


          2.13  Exempt Organic Compounds

            Organic compounds which are excluded from the definition of
            volatile organic compounds by the EPA according to 40 CFR
            51.100.  The exclusions are based upon the determination by the
            EPA that the following exempt compounds have negligible
            photochemical reactivity:

            2.13.1  Methane and inorganic carbon compounds;

              Methane, carbon monoxide, carbon dioxide, carbonic acid,
              metallic carbides or carbonates, and ammonium carbonate

            2.13.2  Chlorinated compounds;

              1,1,1-trichloroethane (methyl chloroform)
              methylene chloride (dichloromethane)

            2.13.3  Chlorofluorocarbons;

              trichlorofluoromethane (CFC-11)
              dichlorodifluoromethane (CFC-12)
              chlorodifluoromethane (CFC-22)
              trifluoromethane (CFC-23)
              1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113)
              1,2-dichloro-1,1,2,2-tetrafluoroethane (CFC-114)
              chloropentafluoroethane (CFC-115)

            2.13.4  Hydrofluorocarbons;

              pentafluoroethane (HFC-125)
              1,1,2,2-tetrafluoroethane (HFC-134)
              1,1,1,2-tetrafluoroethane (HFC-134a)
              1,1,1-trifluoroethane (HFC-143a)
              1,1-difluoroethane (HFC-152a)

            2.13.5  Hydrochlorofluorocarbons;

              2,2-dichloro-1,1,1-trifluoroethane (HCFC-123)
              2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124)
              1,1-dichloro-1-fluoroethane (HCFC-141b)
              1-chloro-1,1-difluoroethane (HCFC-142b)

            2.13.6  Perfluorocarbon compounds which fall into these
                    classes;

              cyclic, branched, or linear, completely fluorinated alkanes,

              cyclic, branched, or linear, completely fluorinated ethers
              with no unsaturations,

              cyclic, branched, or linear, completely fluorinated tertiary
              amines with no unsaturations, and

              sulfur containing perfluorocarbons with no unsaturations and
              with sulfur bonds only to carbon and fluorine.

              Perfluorocarbons shall be assumed to be absent from a product
              or process unless a manufacturer or facility operator
              identifies the specific individual compounds (from the board
              classes of perfluorocarbon compounds) and the amounts present
              in the product or process and provides a validated test
              method which can be used to quantify the specific compounds.


          2.14  Freeboard Height

            2.14.1  For Cold Cleaners:  The vertical distance from the top
                    of the solvent, or the solvent drain of a remote
                    reservoir cold cleaner, to the top of the cold cleaner.

            2.14.2  For Batch-loaded Vapor Solvent Cleaners:  The vertical
                    distance from the top of the solvent vapor-air
                    interface to the bottom of the lowest opening in the
                    solvent cleaner where vapors can escape.
            2.14.3  For Conveyorized Solvent Cleaners:

              2.14.3.1  For non-boiling solvent, the vertical distance from
                        the top of the solvent to the bottom of the lowest
                        opening in the solvent cleaner where vapors can
                        escape.

              2.14.3.2  For boiling solvent, the vertical distance from the
                        top of the solvent vapor-air interface to the
                        bottom of the lowest opening in the solvent cleaner
                        where vapors can escape.


          2.15  Freeboard Ratio

            The freeboard height divided by the smaller of the inside
            length or the inside width of the solvent cleaner evaporative
            area.


          2.16  Initial Boiling Point

            The boiling point of a solvent as defined by ASTM D-1078-86, or
            its successors as amended.


          2.17  Leak

            A volatile organic compound-containing liquid leak from the
            degreaser at a rate of three (3) or more drops per minute.


          2.18  Lip Exhaust

            A system which collects solvent vapors escaping from the top of
            a cleaner.


          2.19  Low Volatility Solvent

            A solvent with an initial boiling point which is greater than
            248F (120C)  and with a temperature as used, at least 180F
            (100C) below the initial boiling point.


          2.20  Make-up Solvent

            That solvent added to the solvent cleaning operation to replace
            solvent lost through evaporation or other means.
          2.21  Refrigerated Freeboard Chiller

            A secondary cooling coil mounted above the primary condenser
            which provides a chilled air blanket above the solvent vapor
            air-interface to cause the condensation of additional solvent
            vapor.


          2.22  Remote Reservoir Cold Cleaner

            A cold cleaner connected to a tank which is completely enclosed
            except for a solvent return opening no larger than 15.5 square
            inches (100 square centimeters) which allows used solvent to
            drain into it from a separate solvent sink or work area and
            which is not accessible for soaking workloads.


          2.23  Solvent

            Compounds, excluding water, which are used as diluents,
            thinners, dissolvers, viscosity reducers, cleaning agents,
            degreasing agents or for other similar uses.


          2.24  Spray Safety Switch

            A manually reset switch which shuts off the spray pump if the
            vapor level drops more than 4 inches (10 cm).


          2.25  Ultrasonics

            Enhancement of the cleaning process by agitation of liquid
            solvents with high frequency sound wave vibrations.


          2.26  Vapor Level Control Thermostat

            A manually reset safety switch which turns off the sump heater
            if the thermostat senses the temperature rising above the
            designed operating level at the air-vapor interface.


          2.27  Vapor Solvent Cleaner

            Any solvent cleaner that cleans through the condensation of hot
            solvent vapor on colder workloads.

          2.28  Volatile Organic Compound (VOC)

            Any compound containing at least one atom of carbon, except
            exempt compounds.


          2.29  Volatile Solvent

            Any solvent that is not a low volatility solvent (refer to
            Section  for definition of low volatility solvent).


          2.30  Waste Solvent Residue

            Material which may contain dirt, oil, metal particles, and/or
            other waste products concentrated after distillation of the
            waste solvent either in the solvent cleaner itself or after
            distillation in a separate still.


          2.31  Wipe Cleaning

            That method of cleaning which utilizes a material such as a rag
            wetted with a solvent, coupled with physical rubbing to remove
            contaminants from surfaces.


          2.32  Workload

            The objects put in a cleaner for the purpose of removing oil,
            grease, soil, coating, dirt or other undesirable matter from
            the surface of the objects.


          2.33  Workload Area

            The plane geometric surface area of the top of the submerged
            parts basket, or the combined plane geometric surface area(s)
            displaced by the submerged workload, if no basket is used.




          PART 3  REQUIREMENTS AND STANDARDS


          3.1   Operational Requirements

            3.1.1   All Cleaners

              3.1.1.1 Cleaners shall not be operated when a leak is present
                      in the system.

              3.1.1.2 All solvent, including waste solvent and waste
                      solvent residues, shall be stored in closed
                      containers at all times.  The containers shall have a
                      label indicating the name of the solvent/material
                      they contain.

              3.1.1.3 Solvent cleaners, except remote reservoir cold
                      cleaners using low volatility solvent, shall be
                      covered except to process work or to perform
                      maintenance.  This Section (3.1.1.3) shall be
                      effective June 15, 1995.

              3.1.1.4 Solvent carry-out shall be minimized by the following
                      methods, as applicable:

                3.1.1.4.1 Use a device whereby pools of solvent can be
                          drained.

                3.1.1.4.2 Limit the vertical speed of a powered hoist, if
                          one is used, to not more than 11 feet per minute
                          (3.3 meters per minute).

                3.1.1.4.3 In vapor degreasers, maintain the workload below
                          the air-vapor interface until condensation
                          ceases.

                3.1.1.4.4 For manual operation, tip out any pools of
                          solvent remaining on the cleaned parts before
                          removing them from the cleaner, and

                3.1.1.4.5 Do not remove parts from the solvent cleaner
                          until visually dry and all dripping ceases. This
                          requirement does not apply to emulsion cleaner
                          workload that is rinsed with water within the
                          cleaner immediately after cleaning.

              3.1.1.5 Solvent agitation shall be achieved using pump
                      recirculation, a mixer, or ultrasonics.  Air
                      agitation shall not be used.

              3.1.1.6 Solvent spray shall only be a continuous fluid
                      stream.  An atomized or shower type spray shall not
                      be used.  In conveyorized cleaners, a shower type
                      spray may be used provided that the spray is
                      conducted in a totally confined space that is
                      separated from the atmosphere.

              3.1.1.7 Any solvent spray system shall not be used in a
                      manner such that liquid solvent splashes outside the
                      container.

              3.1.1.8 For those cleaners equipped with water separators, no
                      water shall be visually detectable in the  solvent
                      exiting the water separator.
            3.1.1.9 Wipe cleaning materials containing solvent shall be
                    kept in closed containers at all times, except during
                    use.

              3.1.1.10A cleaner shall not be located where drafts of air
                      are directed across the cleaner.

              3.1.1.11Drain cleaned material, within the freeboard area, so
                      that the drained solvent is returned to the
                      container.

            3.1.2   Additional Operational Requirements for Batch-loaded
                    and Conveyorized Vapor Cleaners

              In addition to the operational requirements for all cleaners
              specified above in Section , the following operating
              requirements shall apply:

              3.1.2.1 The workload area shall not occupy more than half the
                      evaporative surface area of the solvent cleaner.

              3.1.2.2 Any spray must be kept below the top of the air-vapor
                      interface.


          3.2   Equipment Requirements

            The requirements of this Section shall become effective on June
            15, 1995.

            3.2.1   All cleaners shall be equipped with the following:

              3.2.1.1 Except for remote reservoir cold cleaners using low
                      volatility solvents, an apparatus or cover(s) to
                      reduce solvent evaporation.

              3.2.1.2 A permanent, conspicuous label summarizing the
                      applicable operating requirements contained in
                      Section .

              3.2.1.3 A device for draining cleaned parts which permits the
                      drained solvent to be returned to the cleaner solvent
                      tank.

            3.2.2   Additional Equipment Requirements for Remote Reservoir
                    Cold Cleaners:

              In addition to the equipment requirements for all cleaners
              specified above in Section , remote reservoir cold cleaners
              shall be equipped with the following:

              3.2.2.1 A sink or work area which is sloped sufficiently
                      towards the drain to prevent pooling of solvent.

              3.2.2.2 A single drain hole, not larger than 15.5 square
                      inches (100 square centimeters) in area, for the
                      solvent to flow from the sink into the enclosed
                      reservoir.

              3.2.2.3 Except for remote reservoir cold cleaners using low
                      volatility solvents, a drain plug or a cover for
                      placement over the top of the sink, when the
                      equipment is not in use.

            3.2.3   Additional Equipment Requirements for Cold Cleaners:

              In addition to the equipment requirements for all cleaners
              specified above in Section , Cold Cleaners shall be equipped
              with the following:

              3.2.3.1 For cold cleaners using volatile solvents, a cover
                      that is a sliding, rolling or guillotine (bi-parting)
                      type which is designed to easily open and close.

              3.2.3.2 A permanent, conspicuous mark locating the maximum
                      allowable solvent level conforming to the applicable
                      freeboard requirements.

              3.2.3.3 Freeboard Requirement:

                3.2.3.3.1 Cold cleaners using solvents which are agitated,
                          heated above 120F (50C) or volatile solvents,
                          shall operate with a freeboard ratio equal to or
                          greater than 0.75.

                3.2.3.3.2 A water cover at least 1 inch deep may be used as
                          an acceptable control method to meet the
                          freeboard requirement, if the solvent is
                          insoluble in water and has a specific gravity
                          greater than 1.

            3.2.4   Additional Equipment Requirements for Batch-loaded
                    Vapor Cleaners:

              In addition to the equipment requirements for all cleaners
              specified above in Section , Batch-loaded Vapor Cleaners
              shall be equipped with the following:

              3.2.4.1 A cover that is a sliding, rolling or guillotine (bi-
                      parting) type which is designed to easily open and
                      close without disturbing the vapor zone.

              3.2.4.2 A vapor level control thermostat.

              3.2.4.3 A condenser flow switch.

              3.2.4.4 A spray safety switch.

              3.2.4.5 A primary condenser.
              3.2.4.6 In addition to the above, cleaners with an
                      evaporative surface area greater than or equal to
                      10.8 square feet (1 square meter), shall be equipped
                      with one of following:

                3.2.4.6.1 A refrigerated freeboard chiller for which the
                          chilled air blanket temperature (expressed in F)
                          at the coldest point on the vertical axis in the
                          center of the air-vapor interface shall be no
                          greater than 30 percent of the initial boiling
                          point (expressed in F) of the solvent used or no
                          greater than 40F.  If the chiller operates below
                          the freezing temperature of water, it shall be
                          equipped with an automatic defrost.

                3.2.4.6.2 A freeboard ratio greater than or equal to 0.75.

                3.2.4.6.3 An enclosed design in which the cover or door
                          opens only when the dry part is actually entering
                          or exiting the cleaner.

            3.2.5   Additional Equipment Requirements for Conveyorized Cold
                    Cleaners:

              In addition to the equipment requirements for all cleaners
              specified above in Section , Conveyorized Cold Cleaners shall
              be equipped with the following:

              3.2.5.1 A rotating basket or other method, to prevent cleaned
                      parts from carrying out solvent liquid.

              3.2.5.2 Minimized entrance and exit openings which silhouette
                      the work loads such that the average clearance
                      between material and the edges of the cleaner
                      openings is less than 4 inches (10 centimeters)  or
                      less than 10 percent of the opening width.

              3.2.5.3 Cleaners using solvents which are either agitated,
                      heated above 120F (50C)  or are volatile, shall
                      operate with a freeboard ratio equal to or greater
                      than 0.75.

              3.2.5.4 A water cover at least 1 inch deep may be used as an
                      acceptable control method to meet the freeboard
                      requirement of Section , if the solvent is insoluble
                      in water and has a specific gravity greater than 1.

            3.2.6   Additional Equipment Requirements for Conveyorized
                    Vapor Cleaners:

              In addition to the equipment requirements for all cleaners
              specified above in Section , Conveyorized Vapor Cleaners
              shall be equipped with the following:

              3.2.6.1 An enclosed drying tunnel or other method, such as a
                      rotating basket, sufficient to prevent cleaned parts
                      from carrying out solvent liquid.

              3.2.6.2 Minimized entrance and exit openings which silhouette
                      the work loads such that the average clearance
                      between material and the edges of the cleaner
                      openings is less than 4 inches(10 centimeters)  or
                      less than 10 percent of the opening width.

              3.2.6.3 A primary condenser.

              3.2.6.4 A vapor level control thermostat.

              3.2.6.5 A condenser flow switch.

              3.2.6.6 A spray safety switch.

              3.2.6.7 In addition to the above, cleaners with an
                      evaporative surface area greater than or equal to
                      21.5 square feet (2 square meters), shall be equipped
                      with one of the following:

                3.2.6.7.1 A freeboard ratio greater than or equal to 0.75.

                3.2.6.7.2 A refrigerated freeboard chiller for which the
                          chilled air blanket temperature (expressed in F)
                          at coldest point on the vertical axis in center
                          of the air-vapor interface shall be greater than
                          30 percent of the initial boiling point
                          (expressed in F) of the solvent used or no
                          greater than 40F.  If the chiller operates below
                          freezing temperature of water, it shall equipped
                          with an automatic defrost.


          3.3   Alternative Control Requirements

            A system to collect emissions which are vented to an emissions
            control device may be used to satisfy the requirements of
            Sections , provided that the combined efficiency (the capture
            efficiency multiplied by the control efficiency) of the total
            system shall not be less than 81 percent by weight in reducing
            total non-methane hydrocarbons as determined by EPA Method 25.
            The collection system shall have a ventilation rate not greater
            than 65 cubic feet per minute per square foot (20 cubic meters
            per minute per square meter) over the total area of the solvent
            cleaner openings unless the rate must be changed to meet
            Federal or State Occupational Safety and Health Administration
            requirements.


          061594                                               RULE 433:  2
                                    REGULATION IV
                                     PROHIBITIONS
          3.4   Prohibitions

            3.4.1   After September 15, 1994, a lip exhaust system shall
                    not be added to any cleaner, unless it is vented to a
                    control device, as described in Section .

            3.4.2   No person shall install or operate any solvent cleaning
                    or degreasing equipment that does not conform with the
                    provisions of this Rule.

            3.4.3   The cleaning of porous or absorbent materials such as
                    cloth, leather, wood or rope is prohibited.




          PART 4  ADMINISTRATIVE REQUIREMENTS


          4.1   Recordkeeping

            4.1.1   The operator of any equipment subject to this Rule
                    shall maintain the following dated records:

              4.1.1.1 On a monthly basis, record the facility-wide total
                      volume of make-up solvent used, and waste solvent
                      disposed of or recycled, for all cleaners, except for
                      remote reservoir cold cleaners which are serviced by
                      an independent contractor.  For such remote reservoir
                      cold cleaners, evidence of service shall be required
                      instead.

              4.1.1.2 All records shall be retained for a minimum of five
                      (5) years from the date of each entry.  All records
                      shall be made available to the Air Pollution Control
                      Officer upon request.


          4.2   Recordkeeping Requirements for Emission Control Devices

            Any person using an emission control system as a means of
            complying with this Rule shall maintain daily records of key
            operating and maintenance procedures which will demonstrate
            continuous operation and compliance of the emission control
            device during periods of emission producing activities.  Key
            system operating parameters are those necessary to ensure
            compliance with the percent reduction requirements such as
            temperatures, pressures and flow rates.


          061594                                               RULE 433:  3
                                    REGULATION IV
                                     PROHIBITIONS
          4.3   Test Methods

            4.3.1   Initial Boiling Point of Solvent

              The initial boiling point of the solvent shall be determined
              by ASTM D-1078-86, or its successors as amended.

            4.3.2   Capture Efficiency

              The capture efficiency of an emissions control device shall
              be determined using EPA Capture Efficiency Test Protocols as
              contained in 40 Code of Federal Regulations Part 52.741
              (iii).

            4.3.3   Control Efficiency

              The control efficiency of an emissions control device shall
              be determined using EPA Methods 2, 2A, 2C, or 2D for
              measuring flow rates and EPA Methods 25, 25A, or 25B for
              measuring the total gaseous organic concentrations at the
              inlet and outlet of the emissions control device as contained
              in 40 Code of Federal Regulations Part 60, Appendix A.

            4.3.4   Volumetric Flow Rate

              Volumetric flow rate shall be determined by EPA Methods 2,
              2A, 2C and 2D.

            4.3.5   Exempt Compounds Content

              For the purposes of compliance with this Rule, measurement of
              exempt compounds shall be performed in accordance with ASTM
              D-4457-85 (Solvents and Coatings), or its successors as
              amended, and be consistent with the provisions set forth in
              the Federal Register (FR, Vol. 56, No. 52, March 18, 1991).

            4.3.6   Volatile Organic Compounds Content

              For the purposes of compliance with this Rule, the VOC
              content of solvents shall be measured using EPA Method 24
              (Determination of Volatile Matter Content, Water Content,
              Density, Volume Solids, and Weight Solids of Surface
              Coatings) in 40 Code of Federal Regulations Part 60, Appendix
              A.

                                      * * * * *
          061594                                               RULE 433:  4