MBUAPCD RULE 201 SOURCES NOT REQUIRING PERMITS                                    
LAST REVISED 04/21/93
                                    
                                    REGULATION II
                                       PERMITS

          RULE 201.  SOURCES NOT REQUIRING PERMITS


          (Adopted  9-1-74;  Revised  7-9-75,  9-11-75,  11-21-76, 1-19-77,
          7-26-78, 3-17-82, 12-13-84, 5-15-85, 12-17-86, 9-16-87,  9-21-88,
          6-14-89, 10-16-91, and 4-21-93.)



                                      CONTENTS





          PART 1  GENERAL...............................................
            1
            1.1   Purpose...............................................
              1
            1.2   Applicability.........................................
              1
            1.3   Exemptions............................................
              2
            1.4   Effective Date........................................
              9
            1.5   References............................................
              9




          PART 1  GENERAL


          1.1   Purpose

            The  purpose  of this rule is to provide a list of source types
            which are exempt  from  the  requirements of District Rule 200,
            Permits Required, to obtain an Authority to Construct or Permit
            to Operate.


          1.2   Applicability

            1.2.1   The exemptions provided  in  this  Rule  apply  to  the
            requirements  of  Rule  200,  Permits  Required,  to  obtain an
            Authority to Construct or Permit to Operate.  The exemptions do
            not apply to any requirement for facility operators to register
            with   the   District,  for  purposes  of  emission  or  source
            inventorying, or to any other District requirements.

            1.2.2   Notwithstanding  any  other  provisions in the District
            Rules and Regulations, the exemptions  contained  in this rule,
            except  for  subsection   below,  shall  not  apply to any  new
            stationary source or modification to which Parts  3,  4 or 5 of
            District Rule 207, New or Modified Source Review, applies.

            1.2.3   Notwithstanding  any  other  provisions in the District
              Rules and Regulations, the exemptions  contained herein shall
              not  apply  to  any  source which provides offsets  to  which
              section 6.11.1 of District Rule 207 applies.

            1.2.4   The exemptions in  this  Rule,  as  well  as the permit
            requirements  of  Rule  200,  apply  to individual articles  of
            equipment  or  process  lines.   However,   with   respect   to
            exemptions  at  subsections   and  ,  where  there are multiple
            articles  of  affected  equipment  at  a  single facility,  the
            aggregated ratings of such individual engines  or boilers shall
            be  used  to  determine the applicability of those  exemptions,
            except that no  permit  shall  be  required for IC Engines less
            than 50 hp or for boilers less than 2 million BTU (gas fired).


          1.3   Exemptions
          An Authority to Construct or a Permit  to  Operate  shall  not be
          required  for the sources hereinafter set out, provided, however,
          said sources  shall  comply  with  all  other applicable District
          Rules and Regulations.

            1.3.1   Vehicles as defined by the Vehicle Code of the State of
              California but not including any article, machine, equipment,
              or  other  contrivance  mounted on such  vehicle  that  would
              otherwise require a permit  under  the  provisions  of  these
              rules and regulations.

            1.3.2   Vehicles used to transport passengers or freight.

            1.3.3   Equipment  utilized  exclusively in connection with any
              structure which is designed  for  and  used  exclusively as a
              dwelling  for  not  more  than  four  families, including  an
              incinerator   used  exclusively  in  connection   with   such
              structure.

            1.3.4   Barbeque  equipment  which  is  not used for commercial
              purposes.

            1.3.5   Equipment  used  in  agricultural  operations  for  the
              growing of crops or the raising of fowl or animals.

            1.3.6   Repairs or maintenance not involving structural changes
              to any equipment for which a permit has been granted.

            1.3.7   The following equipment:

              1.3.7.1   comfort  air  conditioning  or comfort  ventilating
                systems which are not designed to remove  air  contaminants
                generated by or released from specific units or equipment;

              1.3.7.2   refrigeration  units  except those used as,  or  in
                conjunction with, air pollution control equipment;

              1.3.7.3   stationary piston type internal combustion engines

                1.3.7.3.1   of 100 or less brake horsepower, or

                1.3.7.3.2   are operated less than  60  hours  per year for
                  testing and are only used for power when normal powerline
                  service fails or are used only for the emergency  pumping
                  of water;

              1.3.7.4   stationary  piston type internal combustion engines
                operated on landfill gas at landfill gas collection systems
                where  the gas production  rate  is  less  than  200  cfm. 
                Landfill  gas collection system is defined as having system
                limits coterminous  with  an actual or designed "final site
                face" (as defined at California Administrative Code Section
                17225.28).  This exemption  shall  be retroactive to May 9,
                1984, and shall not apply to any sources defined as a major
                stationary source or major modification,  as  defined at 40
                CFR 51 Subpart I, and Clean Air Act Sections 172  and 173. 
                This section shall be reconsidered by the District Board in
                five years (by December 17, 1991);

              1.3.7.5   equipment  used  exclusively  for  steam  cleaning,
                except any boiler or steam generator providing steam to the
                system and not exempted by section  below;

              1.3.7.6   processes  used  exclusively  for extruding metals,
                minerals, plastics, and wool;

              1.3.7.7   presses used for the curing of  rubber products and
                plastic products;

              1.3.7.8   equipment used exclusively for space  heating other
                than boilers;

              1.3.7.9   equipment   used   for   hydraulic  or  hydrostatic
                testing;

              1.3.7.10    all  sheet-fed  printing presses  and  all  other
                printing presses without dryers,  which  emit  less than 10
                pounds per day of any organic solvent or coating;

              1.3.7.11    tanks,   vessels   and   pumping  equipment  used
                exclusively  for  the  storage  or  dispensing   of   fresh
                commercial or purer grades of:

                1.3.7.11.1    sulfuric  acid  with  an  acid strength of 99
                  percent or less by weight, and,

                1.3.7.11.2    phosphoric acid, any strength;

              1.3.7.12    ovens used exclusively for the curing of plastics
                which are concurrently being vacuum held  to  a mold or for
                the softening or annealing of plastics;

              1.3.7.13    equipment  used  exclusively  for  the  dying  or
                stripping   (bleaching)   of   textiles  where  no  organic
                solvents, diluents or thinners are used;

              1.3.7.14    equipment  used  exclusively  to  mill  or  grind
                coatings and molding compound  where  all materials charged
                are in a paste form;

              1.3.7.15    crucible type or pot type furnaces with a brimful
                capacity less than 450 cubic inches of any molten metal;

              1.3.7.16    equipment  used exclusively for  the  melting  or
                applying of wax where  no  organic  solvents,  diluents  or
                thinners are used;

              1.3.7.17    equipment  used exclusively for bonding lining to
                brake shoes;

              1.3.7.18    lint traps used  exclusively  in conjunction with
                dry cleaning tumblers;

              1.3.7.19    equipment used in eating establishments  for  the
                purpose of preparing food for human consumption;

              1.3.7.20    equipment  used  exclusively  to compress or hold
                dry natural gas;

              1.3.7.21    tumblers used for the cleaning  or  deburring  of
                metal products without abrasive blasting;

              1.3.7.22    shell core and shell mold manufacturing machines;

              1.3.7.23    molds used for the casting of metals;

              1.3.7.24    abrasive   blast   cabinet-dust  filter  integral
                combination units where the total  internal  volume  of the
                blast section is 50 cubic feet or less;

              1.3.7.25    batch  mixers  of  five  cubic feet rated working
                capacity or less;

              1.3.7.26    equipment used exclusively  for  the packaging of
                lubricants or greases;

              1.3.7.27    equipment used exclusively for the manufacture of
                water emulsions of asphalt, greases, oils or waxes;

              1.3.7.28    ovens  used exclusively for the curing  of  vinyl
                plastisols by the closed mold curing process;

              1.3.7.29    equipment  used  exclusively  for  conveying  and
                storing plastic pellets;

              1.3.7.30    equipment  used  exclusively  for  the mixing and
                blending  of  materials  at  ambient  temperature  to  make
                water-based adhesives;

              1.3.7.31    smokehouses   in  which  the  maximum  horizontal
                inside cross-sectional area does not exceed 20 square feet;

              1.3.7.32    platen presses used for laminating;

              1.3.7.33    equipment used  for  buffing (except automatic or
                semi-automatic   tire  buffers)  or   polishing,   carving,
                cutting, drilling,  machining,  routing,  sanding,  sawing,
                surface  grinding  or  turning  of ceramic artwork, ceramic
                precision   parts,  leather,  metals,   plastics,   rubber,
                fiberboard, masonry, carbon or graphite which is not vented
                to a dust control system; and,

              1.3.7.34    stationary  equipment  used for carving, cutting,
                surface  grinding,  planing,  routing,   sanding,   sawing,
                shredding or turning of wood, for facilities for which  the
                total  aggregated  electrical  horsepower of such equipment
                does  not exceed 50 horsepower.   Drilling  operations  are
                specifically exempted from permit.

            1.3.8   The  following  equipment  or  any  exhaust  system  or
              collector serving exclusively such equipment: 

              1.3.8.1   blast  cleaning  equipment  using  a  suspension of
                abrasive in water;

              1.3.8.2   ovens, mixers, and blenders used in bakeries  where
                the products are edible and intended for human consumption;

              1.3.8.3   kilns   used   for   firing  ceramic  ware,  heated
                exclusively  by  natural  gas,  liquified   petroleum  gas,
                electricity or any combination thereof;

              1.3.8.4   laboratory equipment used exclusively  for chemical
                or physical analysis and bench scale laboratory  equipment,
                which  is  not  vented  by  a  dedicated ventilation system
                separate from general room ventilation;

              1.3.8.5   equipment used for inspection of metal products;

              1.3.8.6   confection cookers where  the  products  are edible
                and intended for human consumption;

              1.3.8.7   equipment  used  exclusively for forging, pressing,
                rolling  or  drawing  of  metals   or  for  heating  metals
                immediately prior to forging, pressing, rolling or drawing;

              1.3.8.8   die casting machines;

              1.3.8.9   atmospheric  generators  used  in  connection  with
                metal heat treating processes;

              1.3.8.10    photographic process equipment  by which an image
                is reproduced upon material sensitized to radiant energy;

              1.3.8.11    brazing, soldering, or welding equipment;

              1.3.8.12    equipment used exclusively for the  sintering  of
                glass or metals;

              1.3.8.13    equipment   used   by   educational  institutions
                (excluding correctional facilities)  or  amateur  hobbyists
                for   buffing  (except  automatic  or  semi-automatic  tire
                buffers)   or   polishing,   carving,   cutting,  drilling,
                machining,  routing, sanding, sawing, surface  grinding  or
                turning  of  ceramic   artwork,  ceramic  precision  parts,
                leather,  metals, plastics,  rubber,  fiberboard,  masonry,
                carbon or graphite;

              1.3.8.14    equipment   used   by   educational  institutions
                (excluding correctional facilities)  or  amateur  hobbyists
                for  carving, cutting, drilling, surface grinding, planing,
                routing,  sanding, sawing, shredding or turning of wood, or
                the pressing  or  storing  of  sawdust,  wood chips or wood
                shavings;

              1.3.8.15    equipment  used  for  washing or drying  products
                fabricated from metal or glass, provided  that  no volatile
                organic materials are used in the process and that  no  oil
                or solid fuel is burned;

              1.3.8.16    laundry  dryers,  extractors or tumblers used for
                fabrics  cleaned only with water  solutions  of  bleach  or
                detergents;

              1.3.8.17    foundry  sand  mold forming equipment to which no
                heat is applied;

              1.3.8.18    ovens  used  exclusively   for   curing   potting
                materials or castings made with epoxy resins;

              1.3.8.19    equipment  used  to  liquify  or separate oxygen,
                nitrogen or the rare gases from the air;

              1.3.8.20    equipment  used  for  compression   molding   and
                injection molding of plastics;

              1.3.8.21    mixers  for  rubber or plastics where no material
                in powder form is added  and  no organic solvents, diluents
                or thinners are used;

              1.3.8.22    equipment    used    exclusively    to    package
                pharmaceuticals  and cosmetics or  to  coat  pharmaceutical
                tablets;

              1.3.8.23    roll mills  or  calendars  for rubber or plastics
                where no organic solvents, diluents, or  thinners are used;
                and,

              1.3.8.24    vacuum  producing  devices  used  in   laboratory
                operations  or in connection with other equipment which  is
                exempt by Rule 20l.

            1.3.9   Steam generators,  steam  superheaters,  water boilers,
              water heaters, and closed heat transfer systems  that  have a
              maximum  heat  input  rate  of  less  than 15 million British
              Thermal   Units  (BTU)  per  hour  (gross)  and   are   fired
              exclusively  with  any natural gas or liquified petroleum gas
              or combination thereof.

            1.3.10    Natural draft  hoods, natural draft stacks or natural
              draft ventilators.

            1.3.11    Containers, reservoirs,  or  tanks  used  exclusively
              for:

              1.3.11.1    dipping operations for coating objects with oils,
                waxes,  or  greases where no organic solvents, diluents  or
                thinners are used;

              1.3.11.2    dipping   operations  for  applying  coatings  of
                natural  or  synthetic  resins  which  contain  no  organic
                solvents;

              1.3.11.3    storage of liquified gases;

              1.3.11.4    unheated  storage  of  organic  materials with an
                initial boiling point of 300°F or greater;

              1.3.11.5    storage of fuel oils with a gravity  of 25°API or
                lower;

              1.3.11.6    storage of lubricating oils;

              1.3.11.7    storage  of  organic  liquids,  except  gasoline,
                normally  used  as  solvents,  diluents  or thinners, inks,
                colorants,  paints,  lacquers,  enamels, varnishes,  liquid
                resins or other surface coatings,  and having a capacity of
                250 gallons or less;

              1.3.11.8    storage  of  liquid  soaps,  liquid   detergents,
                waxes, wax emulsions, or vegetable oils;

              1.3.11.9    unheated storage of asphalt;

              1.3.11.10   unheated solvent dispensing containers,  unheated
                nonconveyorized solvent rinsing containers or unheated non-
                conveyorized coating dip tanks of 250 gallons or less;

              1.3.11.11   transporting of materials on streets or highways,
                but  not including the stationary use of portable equipment
                which may contain materials when transported; and,

              1.3.11.12   storage of gasoline in underground tanks having a
                capacity of less than 250 gallons.

            1.3.12    Equipment used exclusively for heat treating glass or
              metals or  used  exclusively for case hardening, carburizing,
              cyaniding,   nitriding,   carbonitriding,   siliconizing   or
              diffusion treating of metal objects.

            1.3.13    Crucible   furnaces,   pot   furnaces   or  induction
              furnaces,  with a capacity of 1,000 pounds or less  each,  in
              which no sweating  or  distilling is conducted and from which
              only the following metals  are  poured  or  in which only the
              following metals are held in molten state:

              1.3.13.1    aluminum or any alloy containing  over 50 percent
                aluminum;

              1.3.13.2    magnesium or any alloy containing over 50 percent
                magnesium;

              1.3.13.3    lead  or  any  alloy  containing over 50  percent
                lead;

              1.3.13.4    tin or any alloy containing over 50 percent tin;

              1.3.13.5    zinc  or  any alloy containing  over  50  percent
                zinc;

              1.3.13.6    copper; and,

              1.3.13.7    precious metals.

            1.3.14    Furnaces for the  melting of lead or any alloy, or of
              lead or any alloy in a molten  state  where the metal is used
              exclusively in printing processes.

            1.3.15    Vacuum   cleaning   systems   used  exclusively   for
              industrial, commercial, or residential  housekeeping purposes
              except   such   systems  which  handle  hazardous   materials
              regulated by Rule 424.

            1.3.16    Structural  changes  which cannot change the quality,
              nature or quantity of air contaminant emissions.

            1.3.17    Identical replacements  in  whole  or  in part of any
              article,  machine,  equipment  or other contrivance  where  a
              Permit  to  Operate  has previously  been  granted  for  such
              equipment under Rule 200  are  exempt from the requirement to
              obtain an Authority to Construct,  except that an application
              shall be filed for issuance of a revised  Permit to Operate. 
              A revised permit would only be required if  such an identical
              replacement  resulted  in the need to change the  information
              stated in the original permit.

            1.3.18    Orchard heaters as defined in Rule 500.
            1.3.19    Equipment  used  for   the   spray   application   of
              nonarchitectural  coatings,  which is used to apply less than
              five (5) gallons per year of any nonarchitectural coating, or
              any equipment used for the application  of  any  coatings not
              containing  organic  solvents   and which are not applied  by
              spray (as defined at Rule 429.2.3.).

            1.3.20    Facilities   with  cooling  towers   or   evaporative
              condensers where the total  combined water recirculation rate
              of all equipment is less than 500 gallons per minute.


          1.4   Effective Date

            This rule has been in effect since September 1, 1974.  The rule
            in its present form is effective on April 21, 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
            Sections  40910  et seq.) and Health and  Safety  Code  Section
            42300.



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