PLAAPCD RULE 240 SOLVENT CLEANING AND DEGREASING
LAST REVISED 06/08/95



RULE 240 SURFACE CLEANING AND DEGREASING

                         Adopted 06-08-95

                             CONTENTS


100  GENERAL

     101  PURPOSE
     102  APPLICABILITY
     103  EXEMPTION, SOLVENT CLEANING OPERATIONS
     104  EXEMPTION, WIPE CLEANING OPERATIONS
     105  EXEMPTION, AEROSOL PRODUCTS
     106  EXEMPTION RECORDKEEPING AND REPORTING FOR A STATIONARY
          SOURCE WITH DE MINIMIS EMISSIONS

200  DEFINITIONS

     201  AEROSOL PRODUCT
     202  APPLICATION LINE
     203  APPURTENANCES
     204  ARCHITECTURAL COATINGS
     205  CLOSED
     206  CURED COATINGS, CURED INKS, AND CURED ADHESIVES
     207  ELECTRONIC ASSEMBLY
     208  EMISSIONS CONTROL DEVICE
     209  ENCLOSED GUN CLEANER
     210  EXEMPT COMPOUNDS
     211  FACILITY
     212  FLEXOGRAPHIC PRINTING
     213  GRAPHIC ARTS OPERATIONS
     214  GRAVURE PRINTING
     215  JANITORIAL CLEANING
     216  LETTERPRESS PRINTING
     217  LITHOGRAPHIC PRINTING
     218  LIQUID LEAK
     219  MAINTENANCE CLEANING
     220  MANUFACTURING PROCESS
     221  NON-ABSORBENT CONTAINERS
     222  NON-ATOMIZED SOLVENT FLOW
     223  PERSON
     224  PRINTING
     225  REPAIR CLEANING
     226  REPAIR PROCESS
     227  SCREEN PRINTING
     228  SOLVENT
     229  SOLVENT CLEANING OPERATION
     230  SOLVENT CONTAINER
     231  SOLVENT FLUSHING
     232  STATIONARY SOURCE
     233  STRIPPING
     234  SUBSTRATE
     235  SURFACE PREPARATION
     236  ULTRAVIOLET INKS
     237  VOLATILE ORGANIC COMPOUND (VOC)
     238  WIPE CLEANING

300  STANDARDS

     301  SOLVENT REQUIREMENTS
     302  CLEANING DEVICES AND METHODS REQUIREMENTS
     303  EMISSIONS CONTROL DEVICE REQUIREMENTS
     304  STORAGE AND DISPOSAL

400  ADMINISTRATIVE

     401  OPERATING AND MAINTENANCE PLAN
     402  PROCEDURE FOR PROCESSING OPERATION AND MAINTENANCE PLAN
     403  COMPLIANCE SCHEDULE
     404  CALCULATION FOR VOC MASS EMISSION RATE AND PERCENT CONTROL
          EFFICIENCY
     405  CALCULATION FOR DETERMINATION OF VOC CONTENT PER VOLUME OF
          MATERIAL
     406  CALCULATION FOR VOC COMPOSITE PARTIAL PRESSURE
     407  VIOLATIONS

500  MONITORING AND RECORDS

     501  USAGE RECORDS
     502  TEST METHODS
               503  DURATION OF RECORDS100  GENERAL

     101  PURPOSE: The purpose of this rule is to reduce emissions of volatile
          organic compounds (VOC) from solvent cleaning operations, and from
          the storage and disposal of these materials used in solvent cleaning
          operations.

     102  APPLICABILITY: This rule applies to all persons who engage in the
          production, repair, maintenance, or servicing of parts, products,
          tools, machinery, or equipment, and storage and disposal of
          VOC-containing materials used in solvent cleaning operations, for
          operations subject to the following District rules:

          Rule 218, ARCHITECTURAL COATINGS
          Rule 238, FACTORY COATING OF FLAT WOOD PANELING
          Rule 239, GRAPHIC ARTS OPERATIONS
          Rule 227, PETROLEUM DRY CLEANING OPERATIONS
          Rule 236, WOOD PRODUCTS COATING OPERATIONS

     103  EXEMPTION, SOLVENT CLEANING OPERATIONS: The following solvent
          cleaning operations are not subject to any provision of this rule:

          103.1     Cleaning carried out in batch-loaded cold cleaners,
                    remote reservoirs, open-top vapor degreasers,
                    conveyorized degreasers, or film cleaning machines that
                    are regulated under Rule 216, Organic Solvent Cleaning
                    and Degreasing Operations

          103.2     Cleaning operations subject to Rule 227, Petroleum Dry
                    Cleaning Operations.

          103.3     Janitorial cleaning.

          103.4     Rule 223, METAL CAN COATING

          103.5     Rule 244, SEMICONDUCTOR MANUFACTURING OPERATIONS

          103.6     Rule 235, ADHESIVES

     104  EXEMPTION, WIPE CLEANING OPERATIONS: Wipe cleaning is not
          subject to the provisions of Section 301 when carried out for any of
          the following applications:

          104.1     Cleaning of solar cells, laser hardware, and
                    high-precision optics.

          104.2     Cleaning for: conducting performance laboratory tests on
                    coatings, adhesives, or inks; research and development
                    programs; and laboratory tests in quality assurance
                    laboratories.

          104.3     Cleaning of polycarbonate plastics.

     105  EXEMPTION, AEROSOL PRODUCTS: Usage of 160 fluid ounces or less
          per day per facility of aerosol products nor cleaning is exempt from
          Section 301 and Section 302.

     106  EXEMPTION RECORDKEEPING AND REPORTING FOR A STATIONARY
          SOURCE WITH DE MINIMIS EMISSIONS: The recordkeeping and
          reporting provisions in Section 500 shall not apply to a stationary
          source with de minimis emissions or operations as specified in 
          section 106.1a or 106.1b below:          
          
          106.1     In every 12-month period, at least 90 percent of the
                    stationary source's VOC emissions are associated with an
                    operation for which the throughput is less than or equal
                    to the quantities specified in subsections (a) or (b)
                    below:

                    a.   1,400 gallons of any combination of
                         solvent-containing materials but no more than 550
                         gallons of any one solvent-containing material,
                         provided that the materials do not contain the
                         following: methyl chloroform (1,1,1
                         trichloroethane), methylene chloride
                         (dichloromethane), tetrachloroethylene
                         (perchloroethylene), or trichloroethylene;

                    b.   750 gallons of any combination of
                         solvent-containing materials where the materials
                         contain the following: methyl chloroform
                         (1,1,1-trichloroethane), methylene chloride
                         (dichloromethane), tetrachloroethylene
                         (perchloroethylene), or trichloroethylene, but not
                         more than 300 gallons of any one solvent containing
                         material;

        Within 30 days of a written request by the District or the U.S. EPA,
        the owner or operator of a stationary source not maintaining records
        pursuant to Section 500 shall demonstrate that the stationary source's
        emissions or throughput are not in excess of the applicable quantities
        set forth in section 106.1.

200  DEFINITIONS

     201  AEROSOL PRODUCT: A hand-held, nonrefillable container which expels
          pressurized product ingredients by means of a propellant-induced
          force.

     202  APPLICATION LINE: That portion of a motor vehicle assembly
         production line which applies surface and other coatings to motor
         vehicle bodies, hoods, fenders, cargo boxes, doors, and grill opening
         panels.

     203  APPURTENANCES: Accessories to a stationary structure, including,
          but not limited to: hand railings, cabinets, bathroom and kitchen
          fixtures, fences, rain-gutters and downspouts, window screens,
          lampposts, heating and air conditioning equipment, other mechanical
          equipment, large fixed stationary tools and concrete forms.

     204  ARCHITECTURAL COATINGS: Any coatings applied to stationary
          structures and their appurtenances, to motive homes, to pavements, 
          or to curbs.

     205  CLOSED: No visible gaps.

     206  CURED COATINGS, CURED INKS, AND CURED ADHESIVES: Coatings,
          inks, and adhesives that are dry to the touch.

     207  ELECTRONIC ASSEMBLY: All portions of an assembly, including
         circuit card assemblies, printed wire assemblies, printing wiring
         boards, soldered joints, ground wires, bus bars, and other electrical
         fixtures, except the actual cabinet in which the assembly is housed.

     208  EMISSIONS CONTROL DEVICE: Equipment such as an incinerator or
          adsorbed used to prevent air pollutants from reaching the ambient 
          air.     
          
      209  ENCLOSED GUN CLEANER:

          209.1     A device used for the cleaning of spray guns, pots and
                    hoses, which has an enclosed solvent container, is not
                    open to the ambient air when in use, and has a mechanism
                    to force the cleanup material through the gun while the
                    cleaner is in operation; or

          209.2     A device used for the cleaning of spray guns, pots and
                    hoses, which has an enclosed solvent container, uses
                    non-atomized solvent flow to flush the spray equipment and
                    collects and returns the discharged solvent to the
                    enclosed container.

     210  EXEMPT ORGANIC COMPOUNDS: For the purposes of this rule, exempt
          compounds are the following:

          210.1          Methane
          210.2          Carbon dioxide
          210.3          Carbon monoxide
          210.4          Carbonic acid
          210.5          Metallic carbides or carbonates
          210.6          Ammonium carbonate
          210.7          1,1,1-trichloroethane
          210.8          Methylene chloride
          210.9          2,2-dichloro-1,1,1-trifluoroethane (HCFC-123)
          210.10    2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124)
          210.11    Trichlorofluoromethane (CFC-11)
          210.12    Dichlorodifluoromethane (CFC-12)
          210.13    1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113)
          210.14    1-chloro-1,1-difluoro-2-chloro-2,2-difluoroethane
                    (CFC-114)
          210.15    Chloropentafluoroethane (CFC-115)
          210.16    Pentafluoroethane (HFC-125)
          210.17    1,1,2,2-tetrafluoroethane (HFC-134)
          210.18    Tetrafluoroethane (HFC-134a)
          210.19    1,1-dichloro-1-fluoroethane (HCFC-141b)
          210.20    1-chloro-1,1-difluoroethane (HCFC-142b)
          210.21    1,1,1-trifluoroethane (HFC-143a)
          210.22    Chlorodifluoromethane (HCFC-22)
          210.23    Trifluoromethane (HFC-23)
          210.24    Difluoroethane (HFC-152a)
          210.25    The following four classes of perfluorocarbon compounds:
                         a.   Cyclic, branched, or linear, completely
                              fluorinated alkanes.
                         b.   Cyclic, branched, or linear, completely
                              fluorinated ethers with no unsaturations.
                         c.   Cyclic, branched, or linear, completely
                              fluorinated tertiary amines with no
                              unsaturations.
                         d.   Sulfur-containing perfluorocarbons with no
                              unsaturations and with sulfur bonds only to
                              carbon and fluorine.

        Perfluorocarbon compounds will be assumed to be absent from a product
        or process unless a manufacturer or facility operator identifies the
        specific individual compounds (from the broad 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.     
        
   211  FACILITY: A business or businesses engaged in solvent cleaning
        operations which are owned or operated by the same person or persons
        and are located on the same or contiguous parcels.

   212  FLEXOGRAPHIC PRINTING: A printing operation in which words,
       designs, or pictures are applied to a substrate by means of a roll
       printing technique in which a raised pattern is applied to an image
       carrier made of rubber or other elastomeric materials mounted on a
       steel matting cylinder. The image is then printed directly from the
       raised pattern to the substrate.

   213  GRAPHIC ARTS OPERATIONS: Publication gravure, packaging gravure,
       web-feed wallpaper screen printing, specialty gravurer flexographic
       printing operations, lithographic printing operations, letter press
       printing operations, or any coating or laminating operation that
       manufactures flexible packaging material for the packaging industry.
       Coating operations which are performed by a machine having only coating
          units and no printing units are not graphic arts operations.

   214  GRAVURE PRINTING: An intaglio printing operation in which the ink
       is transferred from minute etched wells that comprise the image on a
       plate to the substrate supported by an impression roller, with excess
       ink removed from the plate by a doctor blade.

   215  JANITORIAL CLEANING: The cleaning of building or facility
       components, such as the floor, ceiling, walls, windows, doors,
       stairs, bathrooms, etc.

   216  LETTERPRESS PRINTING: A printing operation in which the image area
       is raised relative to the non image area and the ink is transferred to
       the paper directly from the image surface.

   217  LITHOGRAPHIC PRINTING: A printing operation in which the image
       and non image areas exist in the same plane. The non image area is
       treated chemically so that only the image areas will be printed onto
       the substrate.

   218  LIQUID LEAK: The visible liquid solvent leak from the container at
       a rate of more than three (3) drops per minute, or a visible liquid
       mist.

   219  MAINTENANCE CLEANING: A solvent cleaning operation carried out to
       keep parts product, tools, machinery or equipment in clean and good
       operational condition.

   220  MANUFACTURING PROCESS: The process of making goods or articles by
       hand or by machinery.
   
   221  NON-ABSORBENT CONTAINERS: Containers made of nonporous material
       which do not allow the migration of the liquid solvent through them.
   
   222  NON-ATOMIZED SOLVENT FLOW: Solvent in the form of a liquid stream
       without atomization.

   223  PERSON: Any firm, business establishment, association, partnership,
       corporation or individual, whether acting as principal, agent,
       employee, or any other capacity including any governmental entity or
       charitable organization.

   224  PRINTING: Any graphic arts operation that imparts color, design,
       alphabet, or numerals on a substrate.

   225  REPAIR CLEANING: A solvent-cleaning operation carried out during
       a repair process.     
       
   226  REPAIR PROCESS: The process of returning a damaged object or an
       object not operating properly to good condition.

   227  SCREEN PRINTING: A printing operation in which the printing ink
       passes through a refined form of stencil to a web or fabric. The
       stencil openings determine the form and dimension of the imprint.

   228  SOLVENT: A VOC-containing liquid used to perform solvent cleaning
       operations.

   229  SOLVENT CLEANING OPERATION: The removal of loosely held uncured
       adhesives, uncured inks, uncured coatings, and contaminants which
       include, but are not limited to/ dirt, soil, and grease from parts,
       products, tools, machinery, and equipment. Each distinct method of
       cleaning in a cleaning process which consists of a series of cleaning
       methods shall constitute a separate solvent cleaning operation.

   230  SOLVENT CONTAINER: That part of a cleaning device that holds the
       solvent.
   
   231  SOLVENT FLUSHING: The use of a solvent to remove uncured
       adhesives, uncured inks, uncured coatings, or contaminants from the
       internal surfaces and passages of the equipment by flushing solvent
       through the equipment.

   232  STATIONARY SOURCE: Any building, structure, facility, or emissions
       unit which emits or may emit any affected pollutant directly or as a
       fugitive emission.
   
       232.1     Building, structure, facility, or emissions unit includes
             all pollutant emitting activities which:

                    a.   belong to the same industrial grouping, and;

                    b.   are located on one property or on two or more
                         contiguous properties, and;

                    c.   are under the same or common ownership, operation,
                         or control or which are owned or operated by
                         entities which are under common control.

          232.2     Pollutant emitting activities shall be considered as part
                    of the same industrial grouping if:

                    a.   they belong to the same two-digit standard
                         industrial classification code, or;

                    b.   they are part of a common production process.
                         Common production process includes industrial
                         processes, manufacturing processes and any
                         connected processes involving a common material.

          232.3     The emissions within District boundaries of cargo
                    carriers associated with the stationary source shall be
                    considered emissions from the stationary source to the
                    extent that emission reductions from cargo carriers are
                    proposed as offsets.

     233  STRIPPING: The removal of cured coatings, cured inks, and cured
          adhesives.

     234  SUBSTRATE: The material upon which another material is coated or
          fabricated.

     235  SURFACE PREPARATION: The removal of contaminants such as dust,
         soil, oil, or grease, before coating, adhesive, or ink applications.     
         
     236  ULTRAVIOLET INKS: Inks which dry by polymerization reaction induced
         by ultraviolet energy.

     237  VOLATILE ORGANIC COMPOUNDS (VOC): Compounds containing at least
       one atom of carbon, except for the exempt compounds listed in Section
       210.

     238  WIPE CLEANING: The method of cleaning a surface by physically
          rubbing it with a material such as a rag, paper, or a cotton swab
          moistened with a solvent.

300  STANDARDS: Effective January 1, 1996, the following standards shall apply
     to any person or stationary source subject to this rule:

     301  SOLVENT REQUIREMENTS: A person shall use a solvent to perform
       cleaning operations, including the use of cleaning devices or methods,
       which complies with the applicable requirements set forth below:

           301.1    MANUFACTURING PROCESSES AND COATING, ADHESIVE,
                    OR INK APPLICATIONS: The solvent used to clean
                    substrates during the manufacturing process, or used for
                    surface preparation of substrates before coating,
                    adhesive, or ink applications shall contain VOC equal to
                    or less than 70 grams of VOC per liter of material.

          301.2     REPAIR AND MAINTENANCE: Solvents used for repair or
                    maintenance cleaning shall have a VOC content of 900
                    grams or less of VOC per liter of material and a VOC
                    composite partial pressure of 20 mm Hg or less at 20C
                    (68F).

          301.3     COATINGS AND ADHESIVES APPLICATION EQUIPMENT:
                    Solvents used for cleaning coatings or adhesives
                    application equipment shall have a VOC content of 950
                    grams or less of VOC per liter of material and a VOC
                    composite partial pressure of 35 mm Hg or less at 20C
                    (68F).

          301.4     INK APPLICATION EQUIPMENT: Solvents used for
                    cleaning of ink application equipment in graphic arts
                    shall meet the limits specified below:

                    a.   The solvents used in screen printing shall have a
                         VOC content of 1,070 grams or less of VOC per
                         liter of material, and a VOC composite partial
                         pressure of 5 mm Hg or less at 20C (68F).

                    b.   The solvents used in lithographic and letter press
                         printing shall have a VOC of 900 grams or less of
                         VOC per liter of material, and a VOC composite
                         partial pressure of 25 mm Hg or less at 20C
                         (68F).

                    c.   The solvents used in printing operations not
                         subject to Sections 301.4.a., 301.4.b., or 301
                         .4.d., shall have a VOC content of 100 grams or
                         less of VOC per liter of material, and a VOC
                         composite partial pressure of 20 mm Hg or less at
                         20C (68F).

                    d.   The solvents used to remove ultraviolet inks from
                         application equipment in printing operations shall
                         have a VOC content of 800 grams or less of VOC
                         per liter of material, and a VOC composite partial
                         pressure of 33 mm Hg or less at 20C (68F). This
                         provision does not apply to screen printing.          
                         
          301.5     ELECTRONIC ASSEMBLIES: Solvents used for
                    manufacturing or maintenance cleaning of electronic
                    assemblies shall have a VOC content of 900 grams or less
                    of VOC per liter of material, and a VOC composite
                    partial pressure of 33 mm Hg or less at 20C (68F).

          301.6     On and after January 1, 1996, the solvents used for
                    cleaning polyester resin application equipment shall
                    comply with one of the limits specified below:

                    a.   The solvent shall have a VOC content of 200 grams
                         or less VOC per liter of material;

                    b.   The solvent shall have a VOC content of 1100
                         grams or less of VOC per liter and a VOC composite
                         partial pressure of 1.0 mm Hg or less at 20oC
                         (68oF); or

                    c.   A solvent reclamation system shall be used if the
                         solvent exceed the limits of Sections 301.6a and
                         301.6b, and the solvent usage at the facility
                         exceeds four gallons on any one day.  The
                         reclamation system shall operate at least at 80
                         percent efficiency, on a mass basis.  The solvent
                         residues for on-site reclamation systems shall not
                         contain more than 20 percent VOC, by weight.

     302  CLEANING DEVICES AND METHODS REQUIREMENTS: A person shall
       perform solvent cleaning operations using one of the following cleaning
       devices or methods:

          302.1     Wipe cleaning.

          302.2     Non-propellant spray bottles or containers.

          302.3     An enclosed gun cleaner, pursuant to Section 209.

     303  EMISSIONS CONTROL DEVICE REQUIREMENTS: As an alternative to
          Sections 301 and 302, a person may use emissions collection and
          control devices in association with the solvent cleaning operation
          regulated by this rule provided that:

           303.1    The collection device collects at least 90 percent, by
                   weight, of the emissions generated by the solvent cleaning
                    operation, pursuant to Section 502.6, and

           303.2    The control device reduces VOC emissions from the
                    emission collection system by at least 95 percent, by
                    weight, pursuant to Sections 404 and 502.6.

     304  STORAGE AND DISPOSAL: Regardless of their VOC content, all
       VOC-containing materials used in solvent cleaning operations, such as
       solvents, and cloth and paper moistened with solvents, shall be stored
       in non-absorbent containers with no liquid leaks, which shall be kept
       closed at all times unless filling or emptying.

400  ADMINISTRATIVE

     401  OPERATION AND MAINTENANCE PLAN: Any person choosing to use on
       emissions control device pursuant to Section 303 must submit an
       Operation and Maintenance Plan for the emissions control device to the
       Air Pollution Control Officer for approval. The Plan shall specify
       operation and maintenance procedures which will demonstrate continuous
       operation of the emissions control device, pursuant to Section 303,
       during periods of emissions-producing operations. The Plan shall also
       specify which daily records must be kept to document these operation
       and maintenance procedures. These records shall comply with the
       requirements of Section 501. The Plan shall be implemented upon
       approval by the Air Pollution Control Officer.

     402  PROCEDURE FOR PROCESSING OPERATION AND MAINTENANCE PLAN:

          402.1     APPROVAL OF PLAN: The Air Pollution Control Officer
                    shall determine whether the Operation and Maintenance
                    Plan meets the requirements of Section 401 not later than
                    30 days after receipt of the Plan, or within a longer
                    period of time agreed upon by the parties. The Air
                    Pollution Control Officer shall approve an Operation and
                    Maintenance Plan unless it fails to demonstrate
                    continuous operation of the emissions control device
                    during periods of emissions producing operations,
                    according to the standards set forth in Section 303,
                    and/or it fails to specify which daily records, in
                    accordance with the requirements of Sections 501.2.b.
                    and 501.3, are kept to document the operation and
                    maintenance procedures set forth in the Plan.

          402.2     REVISION OF PLAN: If the Air Pollution Control
                  Officer does not approve an Operation and Maintenance
                  Plan, the Air Pollution Control Officer shall provide
                  written notice to the source ox the deficiency, and the
                  source shall have an additional 30 days from the date of
                  the notification of the deficiency to correct and resubmit
                  the Operation and Maintenance Plan.

     403  COMPLIANCE SCHEDULE: Operation and Maintenance Plans for
        emissions control devices installed as of June 8, 1995, if not
        previously submitted, must be submitted by 16 months after date of
        adoptions, subject to review and approval by the Air Pollution Control
        Officer, pursuant to Section 402 or Rule 502, NEW SOURCE REVIEW.

     404  CALCULATION FOR VOC MASS EMISSION RATE AND PERCENT CONTROL
          EFFICIENCY: The VOC mass emission rate shall be calculated both
        upstream and downstream of the emissions control device based on the
        respective VOC mass concentration and volumetric flow rate, pursuant
        to Section 502.6 and the following equation:

        M = Q x C x (60 Minutes)
            --------------------
                 1 HOUR

          Where:    
                    M  = VOC mass emission rate, in lb/hr.
                    Q  = the volumetric flowrate of the exhaust stack, in
                         scfm.
                    C  = the VOC mass concentration, in lb/scf, as measured
                         by EPA Method 25.

          The percent control efficiency is calculated as follows:

          % CE = (MU - MD) 
                 --------- x 100
                    MU

          Where:
                    CE  =     control efficiency.
                    MU = the upstream VOC mass emission rate, in lb/hr.
                    MD = the downstream VOC mass emission rate, in lb/hr.     
        
        405  CALCULATION FOR DETERMINATION OF VOC CONTENT PER VOLUME OF
             MATERIAL: The volume of material means the volume of the original
           material, plus any VOC containing material added to the original
           material. The weight of VOC per total volume of material shall be
           calculated by the following equation:

                G1  =  Wv - Ww - Wec
                       -------------
                             Vm


          Where:    G1   =    weight of VOC per total volume of material,
                              in grams per liter.
                    Wv   =    weight of all volatile compounds, in
                              grams.
                    Ww = weight of water in grams.
                    Wec= weight of compounds listed as exempt in
                         Section 210 from the definition of VOC, in
                         grams.
                    Vm = volume of material, in liters.


     406  CALCULATION FOR VOC COMPOSITE PARTIAL PRESSURE: VOC
          composite partial pressure is the sum of the partial pressures of the
          compounds defined as VOCs, and shall be calculated by the following
          equation:    n
                        (Wi)(VPi)/(MWi)
                PPc = i=1
                      ----------------------
                       Ww     We    n   Wi
                      ---- + ---- +   ----
                       MWw    MWe  i=1  MWi

          Where:    PPc  =  VOC composite partial pressure at 20oC, in
                            mm Hg.

                    Wi   =  Weight of the (i) VOC compound, in
                            grams.

                    Ww   =  Weight of water, in grams.

                    We   =  Weight of exempt compounds, in grams.

                    MWi  =  Molecular weight of the (i) VOC
                            compound, in grams per gram/mole.

                    MWw  =  Molecular weight of water, in grams
                            per gram/mole.

                    MWe  =  Molecular weight of exempt compound,
                            in grams per gram/mole.

                    VPi  =  Vapor Pressure of the (i) VOC
                            compound at 20oC, in mm Hg.

     407  VIOLATIONS: Failure to comply with any provision of this rule shall
          constitute a violation of the rule.

500  MONITORING AND RECORDS

     501  USAGE RECORDS: In addition to any existing permit conditions issued
       pursuant to Rule 501, GENERAL PERMIT REQUIREMENTS, effective 16
       months after June 8, 1995, any person subject to this rule, including
       operations claiming exemption under Sections 104 and 105 shall comply
       with the following requirements.          
       
       501.1     LIST OF MATERIALS: A current list of solvents in use
                 shall be maintained which includes all of the following
                 items:

               a.   The product namecode of the solvent, and the application
                    pursuant to Section 301.

               b.   The VOC content of the solvent, as determined pursuant to
                    Section 502. 1. The VOC composite partial pressure of
                    the solvent as determined pursuant to Section 502.3.

               c.   Method of cleaning and cleaning device used with the
                    solvent.

          501.2     USAGE AMOUNTS:

                a.  For persons using materials which comply with the
                    standards specified in Section 301, or using materials
                    pursuant to Section 104, records shall be maintained on
                    a monthly basis, showing the type and volume of solvents
                    used.

               b.   For persons using materials exceeding the VOC and VOC
                    composite partial pressure limits specified in Section
                    301, and using an emission control system pursuant to
                    Section 303, or using materials pursuant to Section
                    105, records shall be maintained on a daily/ basis,
                    showing the type and volume of solvents used.

          501.3     CONTROL EQUIPMENT: Any person using an emission
                    control device pursuant to Section 303 shall maintain
                    such records as required by the Operation and Maintenance
                    Plan in Section 401 on a daily basis.

          501.4     DURATION OF RECORDS: Such records shall be maintained
                    on-site for a continuous two-year period and made
                    available to the Air Pollution Control Officer upon
                    request.

     502  TEST METHODS

          502.1     DETERMINATION OF VOC CONTENT: VOC content of
                    solvents shall be determined in accordance with EPA
                    Method 24 and Sections 405 and 502.2 of this rule.

          502.2     DETERMINATION OF COMPOUNDS EXEMPT FROM VOC
                    DEFINITION: Compounds exempted from the VOC
                    definition, as listed in Section 210 of this rule, shall
                    be determined in accordance with ASTMD 4457-85 or ARB
                    Method 432. If any of the per fluorocarbons are being
                    claimed as exempt compounds, the person making the claim
                    must state in advance which compounds are present, and the
                    EPA-approved test method used to make the determination
                    of these compounds.

          502.3     DETERMINATION OF VOC COMPOSITE PARTIAL
                    PRESSURE: VOC composite partial pressure shall be
                    determined in accordance with Sections 406, 502.1,
                    502.2, 502.4, and 502.5 of this rule.

          502.4     DETERMINATION OF VAPOR PRESSURE: Vapor pressure of
                    a VOC shall be determined in accordance with ASTM Method
                    D2879-86, or may be obtained from a published source
                    such as:

                    a.   "The Vapor Pressure of Pure Substances", Boublik,
                         Fried, and Hala; Elsevier Scientific Publishing
                         Company, New York, 1973.

                    b.   "Perry's Chemical Engineer's Handbook",
                         McGraw-Hill Book Company, 1984.

                    c.   "CRC Handbook of Chemistry and Physics, Chemical
                         Rubber Publishing Company, 1986-87.

                    d.   "Lange's Handbook of Chemistry", John Dean, ed.,
                         McGraw-Hill Book Company, 1985. DETERMINATION
                         OF SOLVENT COMPONENTS: The identity of
                         components in solvents shall be determined by EPA
                         Method 18.

          502.5     DETERMINATION OF CONTROL EFFICIENCY: Control
                    efficiency of the emissions control device shall be
                    determined in accordance with EPA Method 18, 25, 25A,
                    EPA Method 2 or 2C (whichever is applicable), and
                    Section 404.

          502.6     DETERMINATION OF COLLECTION EFFICIENCY:
                    Collection efficiency shall be determined according to
                    EPA's technical document, "Guidelines for determining
                    Capture Efficiency", January 9, 1995.

     503  DURATION OF RECORD

       All records maintained pursuant to this rule shall be retained for at
       least two years from date of entry, with the exception that sources
       subject to the requirements of Rule 507, FEDERAL OPERATING
       PERMIT PROGRAM, shall retain records at least five years.  Records
       shall be made available for inspection by the Air Pollution Control
       Officer upon request.