VENTURA COUNTY AIR POLLUTION CONTROL DISTRICT



### Rule 23. Exemptions from Permit (Adopted 10/22/68, Revised 5/23/72, 7/18/72, 8/26/7 4, 3/9/76, 6/14/77, 1/17/78, 6/20/78,11/21/78, 6/17 /80, 5/5/81, 7/2/85, 10/21/86, 11/22/88, 5/16/89,6/20/89, 6/27/89, 9/12/89, 5/8/90 , 1/8/91, 7/16/91, 1/28/92, 6/8/93, 3/22/94, 12/13/94, 7/9/96) The following operations, equipment or emission sou rces are exempt from the requirement to have a perm it, but must comply with emission standards and prohibi tions except as exempted in Rule 55. The owner or operator shall provide calculations, usage records, emissions records and/or operational data as neces sary to substantiate any exemptions which apply to the subj ect facility and as may be required by the District to substantiate such exemption. A. Burning, Incineration, Smoke Open outdoor fires used only for recreational purpo ses, heating or occasional cooking of food for human consumption, where such use is accomplished i n a fireplace or barbecue pit. 1.
Smoke generators which are intentionally operated f or purposes of training observers in observing the shade or opacity of emissions. 2.
Acceptable incinerators used exclusively in connection with any structure designed and used exclusively as a residential dwelling for not more than four (4) families. (Revised 5/23/72) 3.
Safety flares exclusively used for emergency standb y for the disposal of process gases in the event of unavoidable process upsets. (Adopted 6/14/77) 4.

B. Dust Material stock piles. 1. Blasting with explosives. 2. Mobile equipment which is used solely for the movem ent of solid materials. (Revised 5/23/72) 3. Equipment used for buffing (except automatic or semi-automatic tire buffers), polishing, carving, cutting, drilling, machining, routing, sanding, saw ing, surface grinding or turning of ceramic artwork , ceramic precision parts, leather, metals, plastics, rubber, fiberboard, masonry, carbon or graphite. 4.

Equipment used for carving, cutting, drilling, surf ace grinding, planing, routing, sanding, sawing, shredding, or turning of wood or paper, or the pres sing or storing of sawdust, wood chips or wood shavings. 5.

Blast cleaning equipment using a suspension of abra sives in water. 6.Abrasive blast cabinet-dust filter integral combination units where the total internal volume of the b last

section is 50 cubic feet or less. 7.
Batch mixers of 5 cubic feet rated working capacity or less. 8. Tumblers used for the cleaning or deburring of meta l products without abrasive blasting. 9. Lint traps used exclusively in conjunction with drycleaning tumblers. 10. Laundry dryers, extractors or tumblers used for fab rics cleaned only with water solutions of bleach or detergents. 11.

C. Heaters, Boilers Space heating and heat transfer equipment rated at less than one million BTU/s per hour, except reboilers that are part of a glycol dehydration uni t. (Revised 6/14/77, 12/13/94) 1.
Equipment rated at less than one million BTUs per h our and used exclusively for steam cleaning. (Revised 6/20/89) 2.
Natural draft hoods, natural draft stacks or natura l draft ventilators. 3.
D. Vehicles, Engines Aircraft and vehicles as defined by the Vehicle Cod e of the State of California, and the filling of fu el tanks attached to such equipment but not including any equipment mounted on such vehicle that would otherwise come under the jurisdiction of these Rule s and Regulations. 1.

Vehicles used to transport passengers or freight. 2. Self-powered vehicular mounted concrete mixing unit s. 3. Internal combustion engines used exclusively for fr ost protection. 4. Piston driven internal combustion engines used for oil well work-over operations, for driving air pump s at sewage treatment facilities, or for driving irri gation pumps. (Adopted 6/20/78, Revised 5/5/81, 1/8/91) 5.

Internal combustion engines having a maximum designpower rating of less than 50 brake horsepower. (Adopted 6/20/78, Revised 7/2/85) 6.
Emergency internal combustion engines operated eith er during an emergency or during maintenance of the engine. Engine maintenance operation is limitedto 50 hours per calendar year per engine.
For the purpose of this section, an emergency internal combustion engine is either a portable engine used for emergency purposes; an engine that is usedonly when electrical power line or natural gas 7.service fails; or an engine used for the emergency pumping of water for either fire protection or floo d

relief. An emergency engine may not be operated to replace an internal combustion engine or a turbine that has failed or requires maintenance; to supplement aprimary power source when the load capacity or rating of the primary power source has been either reached or exceeded; nor to reduce the demand for electrical power when normal electrical power line service has not failed. Piston driven internal combustion engines used in o il drilling rigs in emergencies to drill relief wel ls. 8.
E. Food Preparation, Processing, Household Equipment used in connection with any structure des igned and used exclusively as a residential dwelling. 1.
Equipment and processing plant equipment used exclu sively and directly for the purpose of preparing food for human consumption where no organic solvent s are used. 2.
Vacuum cleaning systems used exclusively for indust rial, commercial, institutional or residential housekeeping purposes. 3.
Comfort air conditioning or ventilating systems whi ch are not designed to remove air contaminants generated by or released from specific units of equ ipment. 4.
Refrigeration units except those used as, or in con junction with, air pollution control operations. 5.
F. Gaseous Reactive Organic Compound Emissions Storage in or loading into any tank having a capaci ty of 550 gallons or less which is equipped with a submerged fill pipe and is not required to have a v apor recovery system. (Revised 11/22/88) 1.
Equipment for loading and storing of a reactive org anic compound liquid into any stationary storage tank having a capability of holding 250 gallons or less. (Revised 5/23/72) 2.
Equipment for loading of reactive organic compound liquid into transportable containers of 100 gallons or less. 3.
Equipment for loading of a maximum of 500 gallons p er calendar day or less of reactive organic compound liquid into transportable containers. 4.
Containers for the storage of unheated asphalt. (Re vised 5/23/72) 5. Until July 9, 1997; any of the following solvent cl eaning equipment or operations: Non-conveyorized degreasers which use unheated solv ent and which have a liquid surface area of less than 929 square centimeters (1 square foot). a. Non-conveyorized degreasers which use unheated solv ent with an initial boiling point greater than 150 oC (302 oF) and which have a liquid surfac e area of less than 1 square meter (10.8 b. 6.square feet).

Degreasing equipment at any stationary source whereless than 25 gallons of solvent per year are lost to the atmosphere from all such equipment. Sol vent lost shall not include solvent that is recycled or disposed of properly. Any person claimi ng exemption pursuant to this subsection shall maintain adequate monthly records to substantiate their exempt status. c.

Wipe cleaning operations at any stationary source w here less than 25 gallons of solvent per year are lost to the atmosphere from such operations. So lvent lost shall not include solvent that is recycled or disposed of properly. Any person claimi ng exemption pursuant to this subsection shall maintain adequate monthly records to substantiate their exempt status. d.

Products used for facility, grounds, and building m aintenance and repair, including solvents, coatings , adhesives, lubricants, and sealants. Facility maintenance and repair does not include the use of these products for maintenance and repair of process and industrial equipment when this activity is being conducted by contractors. 7.

Janitorial services and use of products for routine janitorial maintenance, including graffiti removal

. 8. Office and administrative use of products such as i nk, marking pens, ink pads, glues and adhesives, an d cleaning solvents. Office and administrative use do es not include production activities by facilities involved in graphic arts operations. 9.

Solvent cleaning operations and materials as follow s: Cleaning agents that contain two percent or less organic solvent, by weight, as used or applied. a. Nonrefillable aerosol cleaning products. b. Cold cleaners which use non-boiling organic solvent (s) with an initial boiling point (excluding water) greater than 150 oC (302 oF) and which have a liquid surface area of less than 1 square meter (10.8 square feet), at any stationary source where less than 1000 pounds of ROC are lost to the atmosphere from all such cold cleaners during any rolling period of 12 consecutive calendar months. (effective 7/9/97) c.

Cleaning activities, excluding coating, ink, adhesi ve and polyester resin operations, where less than 200 pounds each of ROC, methylene chloride, 1, 1,1 trichloroethane, and perchloroethylene are lost to the atmosphere from all such activities at the stationary source during any rolling period of 12 consecutive calendar months. Emissions from cleaning agents that contain two percent or less organic solvent by weight as used o r applied, aerosol products, and cold cleaners included in subsection c above, shall not be includ ed in this determination. (effective 7/9/97) d. 10.

Coating operations and materials as follows: Nonrefillable aerosol spray paints and coatings. a. Coating operations, other than motor vehicle or mob ile equipment coating operations, where less than 200 pounds each of ROC, methylene chloride, 1, 1,1 trichloroethane, and perchloroethylene are lost to the atmosphere during any rolling perio d of 12 consecutive calendar months. (effective 7/9/97) For the purpose of this section, coating operations shall include solvent loss from coatings, thinning, substrate surface preparation, and applic ation equipment cleaning, associated with the coating operation. Emissions from degreasers subjec t to Rule 74.6.1, 74.6.2, and/or 74.6.3, and aerosol products shall not be included in this dete rmination. Emissions included in a graphic arts operation shall not be included in this determinati on. b.

Coatings used in mobile automotive touch-up operati ons where application is done using either a paint brush or an air brush with a cup that holds n o more than 4 ounces of paint. c. 11.

Adhesive operations where less than 200 pounds *eac h of ROC, methylene chloride, 1,1,1 12.trichloroethane, and perchloroethylene are lost to the atmosphere during any rolling period of 12

consecutive calendar months. (effective 7/9/97) (* clerical correction made) For the purpose of this section, adhesive operation s shall include solvent loss from adhesives, thinni ng, substrate surface preparation, and application equi pment cleaning, associated with the adhesive operation. Aerosol adhesives shall be included in this determination. Emissions from degreasers subjec t to Rule 74.6.1, 74.6.2, and/or 74.6.3, shall not beincluded in this determination. Emissions includedin a graphic arts operation shall not be included in this determination. Graphic arts operations (including but not limited to graphic arts operations such as packaging gravur e, publication gravure, flexographic printing, screen printing, letterpress, lithographic printing, or in k jet printing) where less than 200 pounds * each of ROC, methylene chloride, 1,1,1 trichloroethane, and perchloroethylene are lost to the atmosphere during any rolling period of 12 consecutive calendar months. (effective 7/9/97) (* clerical correction m ade) For the purpose of this section, graphic arts operations shall include solvent loss from inks, ink additives, fountain solutions, substrate surface pr eparation, application equipment cleaning, coatings , and adhesives for binding or gluing printed substra tes, associated with the ink operation. Emissions from degreasers subject to Rule 74.6.1, 74.6.2, and /or 74.6.3, and aerosol products shall not be inclu ded in this determination. 13.

Polyester resin operations using less than 20 gallo ns of polyester resin materials each month includin g unsaturated polyester resins, cross-linking agents, catalysts, gel coats, inhibitors, accelerators, promoters, and any other material containing ROC an d used in the polyester resin operation. Inert fill er and cleaning material is specifically excluded fromthis determination. 14.

Operations using organic solvent (other than solven t cleaning operations, coating operations, adhesive operations, ink operations, polyester resin operati ons, semiconductor manufacturing, dry cleaning, and other defined exempted uses) that emit less than 20 0 pounds each of ROC, methylene chloride, 1,1,1 trichloroethane, and perchloroethylene during any r olling period of 12 consecutive calendar months. Emissions from degreasers subject to Rule 74.6.1, 7 4.6.2, and/or 74.6.3, and aerosol products shall no t be included in this determination. These operations include but may not be limited to: stripping, passivation, deoxidation, mold release, debonding, unglueing, defluxing, etching, dewaxing, descaling, drying, and maskant application. 15.

Equipment for melting and applying coatings of oils , waxes, greases, resins, and like substances where no reactive organic solvents, diluents or thinners are used. 16.
Equipment used exclusively for the manufacture of w ater emulsions of asphalt, greases, oils or waxes or the manufacture of waterbased adhesives or waterbased paints. 17.
Equipment used to compress, store, liquefy or separ ate gases from the air or to compress or store natural hydrocarbon gases, other than engines. (Rev ised 5/23/72) 18.
Equipment used exclusively to mill or grind coating s and molding compounds where all materials charged are in a paste form. 19.
Until July 9, 1997, stationary sources, other than motor vehicle or mobile equipment coating operation s, emitting not more than 3 pounds of ROC per day and not more than 200 pounds of ROC per year from 20.surface coating operations including coatings, thin ners, or any other solvent containing materials.

Until July 9, 1997, any motor vehicle or mobile equ ipment coating operation where only hand-held, nonrefillable aerosol cans, 16 ounces or less (net weight) are used (Adopted 6/14/77, Revised 5/16/89, 1/28/92). Any tank or container which is used to hold or stor e reactive organic compound liquids, except gasolin e and crude oil, and which is not required to have re active organic compound vapor emission controls. 21.
Until July 9, 1997, adhesive and sealant operations emitting not more than 200 pounds of ROC per rolling period consisting of 12 consecutive calendar months from adhesives, sealants, adhesive primers , solvents, and aerosol spray products (Adopted 6/8/9 3). 22.

Any soil aeration project exempt from the soil aeration limit in Rule 74.29 pursuant to Subsection C.1 , C.2, or C.3 of Rule 74.29. 23.
Any soil remediation project where collected organi c vapors are not emitted to the atmosphere by any means. For the purpose of this subsection, this may include, but is not limited to, routing the vapors into the ground. 24.

G. Experimental Operations Bench scale experimental or research operations andequipment used exclusively for investigation, experimentation or research to advance the state of air pollution control knowledge or to improve tech niques, provided however, the Air Pollution Control Officer has given express prior approval which shall inclu de limitation of time. (Revised 5/23/72) H. Plastics and Rubber Presses used for the curing of rubber products and plastic products. 1. Ovens used exclusively for the curing of plastics w hich are concurrently being vacuum held to a molt o r for the softening or annealing of plastics. 2.
Equipment used for compression molding or injectionmoulding of plastics. 3. Mixers for rubber or plastics where no material in powder form is added and no organic solvents, diluents or thinners are used. 4.
Ovens used exclusively for the curing of vinyl plas tisols by the closet mold curing process. 5. Roll mills or calendar for rubber or plastics whereno organic solvents, diluents or thinners are used

. 6. Ovens used exclusively for curing potting materials or castings made with epoxy resins. 7. Equipment used exclusively for conveying and storin g plastic pellets. 8.I. Metals and Ceramics

Porcelain enameling furnaces, porcelain enameling drying ovens, vitreous enameling furnaces or vitreous enameling drying ovens of one million BTU/ s per hour or less heat input. (Revised 5/23/72) 1.
Kilns used for firing ceramic ware of one million B TU/s per hour or less heat input. (Revised 6/14/77) 2. Equipment used exclusively for heat treating or sin tering glass or metals or for case hardening metals of one million BTU/s per hour or less heat input. (Rev ised 5/23/72) 3.
Presses used exclusively for extruding metals, mine rals, plastics or wood where no heat is applied. (Revised 5/23/72) 4.
Equipment used for hydraulic or hydrostatic testing

. 5. Equipment used for inspection of metal products. 6. Brazing, soldering or welding equipment. 7. Molds used for the casting of metals. 8. Equipment using dilute aqueous solutions for surfac e preparation, cleaning, stripping, etching (does n ot include chemical milling) or the electrolytic plati ng, electrolytic polishing or the electrolytic stri pping of brass, bronze, cadmium, copper, iron, lead, nick el, tin, and zinc. This exemption does not apply to chrome plating or chromic acid anodizing. (Revised 5/23/72, 6/27/89) 9.

Equipment used for washing or drying products fabri cated from metal or glass, provided that no volatil e organic materials are used in the process and that no oil or solid fuel is burned. 10.
Crucible furnaces, pot furnaces, or induction furna ces, with a capacity of 1000 pounds or less each wi th fail-safe temperature controllers preventing vapor boil-off, 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 a molten state. (Revised 5/23/72) Aluminum or any alloy containing over 50 percent al uminum. a. Magnesium or any alloy containing over 50 percent m agnesium. b. Lead or any alloy containing over 50 percent lead. c. Tin or any alloy containing over 50 percent tin. d. Zinc or any alloy containing over 50 percent zinc. e. Copper f. Precious metals g. 11.

Crucible furnaces, pot furnaces or induction furnac es with a brimful capacity of less than 450 cubic inches of any molten metal. (Revised 6/14/77) 12.

J. Miscellaneous Bench scale laboratory equipment used exclusively f or chemical or physical analyses or experiments. (Revised 6/14/77) 1.Vacuum producing devices in laboratory operations o r in connection with other equipment which is

exempt by this Rule. 2.
Until July 9, 1997, graphic arts operations (packag ing gravure, publication gravure, flexographic printing, screen printing, letterpress, lithographi c printing, or ink jet printing) with total facility emissions from graphic arts operations of not more than 200 pounds of ROC per rolling period of 12 consecutive calendar months from inks, coatings, fo untain solutions, solvents, and adhesives used for the binding of books or periodicals. Solvents shallinclude ink additives and materials used for the clean-up of graphic arts equipment. (Revised 5/23/7 2, 3/22/94) 3.

Photographic process equipment by which an image is reproduced upon material sensitized to radiant energy. 4.
Equipment used exclusively to package pharmaceutica ls or cosmetics or to coat pharmaceutical tablets. 5. Shell-core and shell-mold manufacturing machines. 6. Die casting machines. 7. Equipment used exclusively for bonding lining to br ake shoes. 8. Valves and flanges. 9. Cooling towers and ponds. 10. Equipment used exclusively for the dyeing or stripp ing (bleaching) of textiles where no organic solvents, diluents, thinners or sulfur compounds ar e used. 11.
Any article, machine, equipment, contrivance or the ir exhaust systems, the discharge from which contains airborne radioactive materials and which i s emitted into the atmosphere in concentrations above the natural radioactive background concentration in air. "Air-borne radioactive material" means any radioactive material dispersed in the air in th e form of dusts, fumes, smoke, mists, liquids, vapo rs or gases. Atomic energy development and radiation protection are controlled by the State of California to the extent it has jurisdiction thereof, in accordance w ith the advice and recommendations made to the Governor by the Advisory Council on Atomic Energy D evelopment and Radiation Protection. Such development and protection are fully regulated by the United States Atomic Energy Commission to the extent that such authority has not been delegated t o the states. 12.

Repairs, including the replacement of worn or defec tive parts, to any article, machine, equipment or other contrivance where a Permit to Operate had pre viously been granted for such equipment, so long as such repairs do not constitute a substantial rep lacement of the equipment as a whole. (Revised 1/17/78) 13.

Any sterilizer or aerator at a stationary source wh ere the amount of ethylene oxide charged to all sterilizers at the stationary source is no more than 4 pounds per year (lb/yr). 14.