MBUAPCD RULE 426 ARCHITECTURAL COATINGS                                    
LAST REVISED 08/25/93
                                    
                                    REGULATION  IV
                                     PROHIBITIONS
          *컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴*
          RULE 426    ARCHITECTURAL COATINGS
          *컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴*


          (Adopted 5-16-79; Revised 3-17-82, 12-15-82, 12-21-83, 12-13-84
          and 8-25-93.)


                                      CONTENTS

          PART  1 GENERAL..............................................2
            
            1.1   Purpose..............................................2
                  
            1.2   Applicability........................................2
              
            1.3   Exemptions...........................................2
              
            1.4   Effective Dates......................................4
              
            1.5   References...........................................4
              

          PART  2 DEFINITIONS..........................................4
            
            2.1   Architectural Coating................................4
                  
            2.2   Below Ground Wood Preservatives......................4
                  
            2.3   Bituminous Coating Materials.........................4
                  
            2.4   Bond Breakers........................................5
                  
            2.5   Concrete Curing Compounds............................5
              
            2.6   Dry Fog Coating......................................5
              
            2.7   Enamel Undercoaters..................................5
              
            2.8   Exempt Organic Compounds.............................5
              
            2.9   Fire Retardant Coatings..............................6
                  
            2.10    General Primers....................................7
              
            2.11    General Sealers....................................7
              
            2.12    General Undercoaters...............................7
              
            2.13    Graphic Arts Coatings..............................7
              
            2.14    Industrial Maintenance Primers.....................7
              
            2.15    Industrial Maintenance Topcoats....................7
              
            2.16    Lacquer............................................8
              
            2.17    Mastic Texture Coatings............................8
              
            2.18    Mastic Waterproofing Coatings......................8
              
            2.19    Metallic Pigmented Paints..........................8
              
            2.20    Multi-colored Coatings.............................8
              
            2.21    Non-flat Coatings..................................8
              
            2.22    Opaque Stains......................................8
              
            2.23    Opaque Wood Preservatives..........................9
              
            2.24    Quick Dry Primers and Sealers......................9
              
            2.25    Quick Dry Enamels..................................9
              
            2.26    Roof Coatings......................................9
              
            2.27    Semi-transparent Stains............................9
              
            2.28    Semi-transparent Wood Preservatives................9
              
            2.29    Shellacs..........................................10
              
            2.30    Specialty Flat Products...........................10
              
            2.31    Specialty Primers, Sealers, and Undercoaters......10
              
            2.32    Swimming Pool Coatings............................10
              
            2.33    Tile-like Glaze Coatings..........................10
              
            2.34    Traffic Coatings..................................10
              
            2.35    Varnishes.........................................11
              
            2.36    Volatile Organic Compounds (VOC)..................11
              
            2.37    Waterproofing Sealers.............................11
              

          PART  3 REQUIREMENTS AND STANDARDS..........................11
            
            3.1   Restrictions on Coating Sales and Applications......11
              
            3.2   Applicability of Most Restrictive Standards.........12
              

          PART  4 ADMINISTRATIVE REQUIREMENTS.........................12
            
            4.1   Date of Manufacture Labelling.......................12
              
            4.2   Recommendation to Apply without Thinning............12
              

          PART  5 TEST METHODS........................................12
            
            5.1   VOC Content.........................................12
              
            5.2   Exempt Organic Compound Content.....................13
              




          PART  1 GENERAL


          1.1   Purpose

            The purpose of this Rule is to limit the emissions of vapors of
            organic compounds from the use of architectural coatings.


          1.2   Applicability

            The provisions of this Rule shall apply to the manufacture,
            sale, and application of architectural coatings unless
            specifically exempted by this Rule.


          1.3   Exemptions

            The provisions of Section 3.1 shall not apply to the following
            coatings:

            1.3.1   architectural coatings sold in the District for
                    shipment outside of this District or for shipment to
                    other manufacturers for repackaging;

            1.3.2   architectural coatings supplied in containers having
                    capacities of one quart or less;

            1.3.3   architectural coatings recommended by the manufacturer
                    for use solely as a shellac, quick dry primer, sealer
                    or undercoat, below ground wood preservative, fire
                    retardant coating, tile-like glaze coating, metallic
                    pigmented paints, swimming pool coatings, graphic arts
                    coatings, mastic texture coatings, multi-colored
                    coatings, dry fog coatings, and bond breakers; and

            1.3.4   the specialty coatings listed below.  No person shall
                    sell, offer for sale, or apply any of the coatings
                    listed in this Section which, at the time of sale or
                    manufacture, exceeds the following limits (expressed as
                    grams of VOC per liter of coating as applied, excluding
                    water, exempt organic compounds, and any colorant added
                    to tint bases) after the date listed below:

                  Effective                                 9-1-84  9-1-89

                  Varnish .................................   500   350
                  Lacquer .................................   ---   680
                  Semi-transparent Stains .................   ---   350
                  Opaque Stains ...........................   400   350
                  Semi-transparent and Clear
                  Wood Preservatives.......................   ---   350
                  Opaque Wood Preservatives................   400   350
                  General Primers, Sealers and
                  Undercoaters ............................   400   350
                  Specialty Primers, Sealers and
                  Undercoaters ............................   ---   350
                  Industrial Maintenance Primers
                  and Topcoats ............................   ---   420
                  Quick Dry Enamels .......................   ---   400
                  Specialty Flats .........................   ---   400
                  Waterproof Sealers.......................   ---   400
                  Concrete Curing Compounds................   ---   350
                  Roof Coatings............................   ---   300
                  Waterproofing Mastic Coatings............   ---   300
                  Enamel Undercoaters......................   450   350
                  Traffic Paints
                  For public streets and highways..........   415   250
                  For other surfaces ......................   250   250
                  Black traffic coatings ..................   ---   250

            1.3.5   If anywhere on the coating container, or any sticker or
                    label affixed thereto, or in any sales or advertising
                    literature, any indication is given that the coating
                    may be used or is suitable for use for any purpose
                    other than those specifically provided for in Part
                    1.3.4, then the exemption provided for in Part 1.3.4
                    shall not apply to that coating.

          1.4   Effective Dates

            This Rule has been in effect since May 16, 1979.  The Rule in
            its present form is effective August 25, 1993.

          1.5   References

            The requirements of this Rule arise from the provisions of the
            California Clean Air Act and amendments (Health and Safety Code
            Section 40910 et seq.) and the federal Clean Air Act and
            amendments (42 U.S.C. Section 7401 et seq.)

          PART  2 DEFINITIONS


          2.1   Architectural Coating

            Any coating applied to stationary structures and their
            appurtenances, to mobile homes, to pavement, or to curbs.

          2.2   Below Ground Wood Preservatives

            Heavy duty coatings formulated solely for the purpose of
            protecting below ground wood from decay or insect attack and
            which contain a wood preservative chemical registered by the
            California Department of Food and Agriculture.  These coatings
            perform their function by penetrating into the wood.

          2.3   Bituminous Coating Materials

            Black or brownish materials, soluble in carbon disulfide,
            consisting mainly of hydrocarbons and which are obtained from
            natural deposits or as residues from the distillation of crude
            petroleum oils, or of low grades of coal.

          2.4   Bond Breakers

            Coatings whose sole purpose, when applied between layers of
            concrete, is to prevent the freshly poured top layer of
            concrete from bonding to the substrate on which it is poured.

          2.5   Concrete Curing Compounds

            Coatings whose sole purpose is to retard the evaporation of
            water from the surface of freshly cast concrete, thereby
            strengthening it.

          2.6   Dry Fog Coating

            Coatings which are formulated so that when sprayed, overspray
            droplets dry before subsequent contact with other surfaces.

          2.7   Enamel Undercoaters

            Coatings which are designed to be applied to a new surface over
            a primer or over a previous coat of paint, in order to improve
            the seal, provide better adhesion and make a smooth base for
            non-flat coatings.

          2.8   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 lists of exempt compounds have
            negligible photochemical reactivity:

            2.8.1   Methane and inorganic carbon compounds;

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

            2.8.2   Chlorinated compounds;

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

            2.8.3   Chlorofluorocarbons (CFCs);

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

            2.8.4   Hydrofluorocarbons (HFCs);

              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)

            2.8.5   Hydrochlorofluorocarbons (HCFCs);

              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)

            2.8.6   Perfluorocarbon compounds which fall into the classes
                    listed below; perfluorocarbon compounds shall be
                    assumed to be absent from a product unless the
                    manufacturer identifies the specific individual
                    compound(s) and the amount(s) present in the product
                    and provides a test method that can be validated by the
                    California Air Resources Board and the EPA for
                    determination of the quantities of the specific
                    compounds:

              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.

          2.9   Fire Retardant Coatings

            Architectural coatings which are designated to retard fires and
            which will significantly:

            a.  reduce the rate of flame spread on the surface of a
                material to which such coating has been applied, or

            b.  resist ignition when exposed to high temperatures, or

            c.  insulate a substrate to which such a coating has been
                applied and prolong the time required to reach ignition
                temperature.

          2.10    General Primers

            Coatings which are intended to be applied to a surface to
            provide a firm bond between the substrate and subsequent coats.

          2.11    General Sealers

            Coatings which are intended for use on porous substrates to
            protect the substrate, to prevent subsequent coatings from
            being absorbed by the substrate, or to prevent harm to
            subsequent coatings by materials in the substrate.

          2.12    General Undercoaters

            Coatings which are designed to provide a smooth surface for
            subsequent coats.

          2.13    Graphic Arts Coatings

            Coatings which are to be marketed solely for application to
            indoor and outdoor signs and include letter enamels, poster
            colors, and bulletin colors.

          2.14    Industrial Maintenance Primers

            Coatings which are intended to be applied to a surface prior to
            the application of an industrial maintenance topcoat, to
            provide a firm bond between the substrate and subsequent coats.

          2.15    Industrial Maintenance Topcoats
            High performance coatings which are formulated for the purpose
            of heavy abrasion, water immersion, chemical, corrosion,
            temperature, electrical, or solvent resistance.

          2.16    Lacquer

            Clear or pigmented coatings formulated with nitrocellulose or
            synthetic resins to dry by evaporation without chemical
            reaction and to provide a quick drying, solid protective film.

          2.17    Mastic Texture Coatings

            Coatings, except waterproofing mastic coatings, which are
            formulated to cover holes and minor cracks and to conceal
            irregularities.

          2.18    Mastic Waterproofing Coatings

            Weatherproof and waterproof coatings which are formulated to
            cover holes and minor cracks and to conceal surface
            irregularities, and which are to be applied in thicknesses of
            at least 15 mils.

          2.19    Metallic Pigmented Paints

            Non-bituminous coatings which are formulated with metallic
            pigment.

          2.20    Multi-colored Coatings

            Coatings which exhibit more than one color when applied and
            which are packaged in a single container and applied in a
            single coat.

          2.21    Non-flat Coatings

            Coatings which register gloss of 15 or greater on a 85 meter
            or five or greater on a 60 meter, and which is identified on a
            label as a gloss, semigloss, or eggshell enamel coating.

          2.22    Opaque Stains

            All stains that are not classified as semi-transparent stains.

          2.23    Opaque Wood Preservatives

            A wood preservative not classified as a semi-transparent wood
            preservative.

          2.24    Quick Dry Primers and Sealers

            Primers, sealers, and undercoaters which are intended to be
            applied to a surface to provide a firm bond between the
            substrate and subsequent coats and which are dry to touch in
            one-half hour and can be recoated in two hours. (Reference ASTM
            Method 1640)

          2.25    Quick Dry Enamels

            Non-flat coatings which comply with the following:

            a.  capable of being applied directly from the container by
                brush or roller under normal conditions, normal conditions
                being ambient temperatures between 60F and 80F;

            b.  when tested in accordance with ASTM Method D 1640: set to
                touch in two hours or less, and dry hard in eight hours or
                less by the mechanical method test; and

            c.  have a 60F dried film gloss of no less than 70.

          2.26    Roof Coatings

            Coatings which are formulated for the sole purpose of
            preventing penetration of the substrate by water.  These
            coatings include bituminous roof and waterproof mastic
            coatings.

          2.27    Semi-transparent Stains

            Coatings which are formulated to change the color of a surface
            but not conceal the surface.

          2.28    Semi-transparent Wood Preservatives

            Wood preservative stains which are formulated for the purpose
            of protecting exposed wood from decay or insect attack by the
            addition of a wood preservative chemical registered by the
            California Department of Food and Agriculture, and which are
            formulated to change the color of a surface but not conceal the
            surface.  These coatings perform their function by penetrating
            into the wood.

          2.29    Shellacs

            Clear or pigmented coatings formulated with natural resins
            (except nitrocellulose resins), thinned with alcohol, and
            formulated to dry by evaporation without a chemical reaction
            and are intended to provide stain blocking properties as well
            as a solid protective film.

          2.30    Specialty Flat Products

            Self-priming flat products used only to perform one of the
            following functions:  repair fire, smoke or water damage;
            neutralize odors; block stains; or coat acoustical materials
            without affecting their acoustical abilities.

          2.31    Specialty Primers, Sealers, and Undercoaters

            Primers, sealers and undercoaters used only to perform one of
            the following functions:  repair fire, smoke or water damage;
            neutralize odor; block stains; block efflorescence; condition
            chalky surfaces or coat acoustical materials without affecting
            their acoustical abilities.

          2.32    Swimming Pool Coatings

            Coatings specifically formulated to coat the interior of
            swimming pools and to resist swimming pool chemicals.

          2.33    Tile-like Glaze Coatings

            Coatings which are formulated to provide a tough, extra-durable
            coating system, to be applied as continuous(seamless) high-
            build film which cures to a hard glaze finish.

          2.34    Traffic Coatings

            Coatings which are formulated to be applied to public streets,
            highways, and other surfaces including, but not limited to
            curbs, berms, driveways, and parking lots.

          2.35    Varnishes

            Clear or pigmented coatings formulated with various resins to
            dry by chemical reaction on exposure to air.  These coatings
            are intended to provide a durable, solid protective film.

          2.36    Volatile Organic Compounds (VOC)

            Any compound containing one or more atoms of carbon, except
            exempt organic compounds, as defined.  For the purpose of
            determination of the VOC content of a material or organic
            solvent mixture; product labels, manufacturer's data sheets, or
            the test methods described in Part 5 of this Rule may be used.

          2.37    Waterproofing Sealers

            Coatings which are formulated for the sole purpose of
            protecting porous substrates by preventing the penetration of
            water.

          PART  3 REQUIREMENTS AND STANDARDS

          3.1   Restrictions on Coating Sales and Applications

            No person shall sell, offer for sale or apply any architectural
            coating which meets any of the following criteria:

            3.1.1   The coating contains more than 250 grams of volatile
                    organic compound per liter of coating as applied (2.08
                    pounds per gallon), excluding any water, exempt organic
                    compounds, and colorant added to tint bases, except as
                    provided in Section 1.3.1.

            3.1.2   The coating contains more than 380 grams of volatile
                    organic compound per liter of coating as applied (3.17
                    pounds per gallon), excluding any water, exempt organic
                    compounds, and colorant added to tint bases, and is
                    defined as a nonflat coating and is manufactured prior
                    to September 2, 1986.

            3.1.3   The coating is recommended for use as a bituminous
                    pavement sealer unless it is an emulsion type coating.

          3.2   Applicability of Most Restrictive Standards

            In any instance where more than one of the standards set forth
            in Section 3.1 may be applicable, the most restrictive standard
            shall apply.

          PART  4 ADMINISTRATIVE REQUIREMENTS

          4.1   Date of Manufacture Labelling and Filing

            Containers for all coatings subject to Section 3.1 shall
            display the date of manufacture of the contents or a code
            indicating the dates of manufacture.  The manufacturers of such
            coatings shall file with the Air Pollution Control Officer of
            the District and the Executive Officer of the California Air
            Resources Board prior to July 1, 1980, an explanation of each
            code.

          4.2   Recommendation to Apply without Thinning

            Containers for all coatings subject to the requirements of
            Section 3.1 shall carry a statement of the recommendation of
            the manufacturer regarding thinning of the coating with a VOC.
            The recommendation shall specify that the coating is to be
            employed without thinning or diluting except under normal
            environmental and application conditions unless any thinning
            recommended on the label for normal environmental and
            application conditions does not cause a coating to exceed its
            applicable standard.

          PART  5 TEST METHODS

          5.1   VOC Content

            Measurement of volatile organic compounds in architectural
            coatings shall be conducted and reported in accordance with EPA
            Test Method 24, Determination of volatile matter content, water
            content, density, volume solids, and weight solids of surface
            coatings (40 CFR 60, Appendix A).

          5.2   Exempt Organic Compound Content

            The quantity of exempt organic compounds in architectural
            coatings shall be determined using California Air Resources
            Board Test Method 432, Determination of Dichloromethane and
            1,1,1-Trichloroethane in Paints and Coatings.  Specific
            perfluorinated compounds may be determined by methods validated
            by the Air Resources Board and the EPA.

                                      * * * * *
          082593                                               Rule 426:  1