Chapter I, Article II Definitions

Adopted November 22, 1976, June 23, 1998 (Sections 228 and 237.5 Adopted June 23, 1998)

Section 200:     Whenever any words or phrases as used in these Rules and Regulations are not defined herein but are defined in Division 26 of the Health and Safety Code as last amended, such definitions are incorporated herein and shall be deemed to apply as if set forth in these Rules and Regulations.
Section 201: Unless the context requires otherwise, the definitions set forth in the Chapter shall govern the construction of these Rules and Regulations.

Section 201.5: ARB, and CARB: The State of California Air Resources Board.
Section 201.6: Aggregate: A mixture of mineral fragments, sand, gravel, rocks, or similar materials.
Section 202: Agricultural Operations: The growing and harvesting of crops, including timber, or the raising of animals, as a gainful occupation.
Section 203: Agricultural Burning: (a) Open outdoor fires used in agricultural operations in the growing of crops or raising of animals or open outdoor fires used in forest management, range improvement, or the improvement of land for wildlife and game habitat, or disease or pest prevention; (b) Agricultural burning also means open outdoor fires used in the operation or maintenance of a system for the delivery of water for the purpose specified in subdivision (a) Section 203. Health and Safety Code Section 41807 shall not apply to such burning under this subdivision.
Section 204: Air Contaminant or Air Pollution: Any discharge, release, or other propagation into the atmosphere which includes, but is not limited to, smoke, charred paper, dust, soot, grime, carbon, fumes, gases, odors, particulate matter, acids, or any combination thereof.
Section 205: Air Pollution Abatement Operations: Any operation which has as its essential purpose a significant reduction in (a) the emissions of air contaminants or pollution, or (b) the effect of such emissions or pollution.

Section 205.1: The Air Pollution Control Director; shall have all the powers and duties of the Air Pollution Control Officer as specified in Chapter 7, Part III, Division 26 of the Health and Safety Code.
Section 205.2: Alluvial Deposit: Any deposit of sediments laid down by running water including but not limited to streams and rivers.
Section 206:  Alteration: Any addition to or enlargement of, or any major modification or change in design, capacity, process or arrangement, which will significantly increase or affect the kind or amount of air contaminant emitted.
Section 207: Ambient Air Quality Standards: Specified concentrations and durations of air pollutants which reflect the relationship between the intensity and composition of air pollution to undesirable effects established by the State Board or, where applicable, by the Federal Government.

Section 207.1: ARB Test Method 435: The test method specified in Title 17, California Code of Regulations, Section 94147.
Section 207.2: Asbestos: Asbestiforms of the following hydrated minerals: chrysotile (fibrous serpentine), crocidolite (fibrous riebecktite), amosite (fibrous cummingtonite-grunerite), fibrous tremolite, fibrous actinolite, and fibrous anthophyllite.
Section 208: Atmosphere: The air that envelopes or surrounds the earth.
Section 208.1: Best Available Control Technology (BACT): The maximum degree of emission control for any air contaminant emitting equipment taking into account technology which is known to be practical and feasible but not necessarily in use provided the Air Pollution Control Officer shall not interpret BACT to include a requirement that will result in the closing and elimination of or the inability to construct or operate a lawful business which could be operated with the application of the best control technology currently in use, or cause a situation where an exclusive manufacturer of BACT will obtain unreasonable compensation for such technology.
Section 208.6: California Health and Safety Code, CH&SC, Health and Safety Code, Health and Safety and H&S: All of the preceding terms are identical and mean the California Health and Safety Code. Air Resources regulations can be found in Titles 13 and 17 of the California Code of Regulation.
Section 209:

Carbon Monoxide: A colorless gas, odorless under atmospheric conditions, having the molecular formula CO.

Section 209.5: Airborne Toxic Control Measures for Hexavalent Chromium: Chrome Plating; and Chromic Acid Anodizing Facilities, and Cooling Towers - For the purpose of Section 460 and 461 the following definitions shall apply:

  1.  "Chromic Acid Anodizing Facilities:Ampere Hours;" means the integral of electrical current applied to a plating tank (amperes) over a period of time (hours).
  2. " Chrome Plating:Anti-mist Additive;" means a chemical which reduces the emission rate from the tank when added to and maintained in the plating tank.
  3.  "Chrome Plating:Chrome;" means metallic chrome.
  4. "Chromic Anodizing Facilities:Chromic Acid;" means an aqueous solution of chromium trioxide (CrO3) or a commercial solution containing chromic acid, dichromic acid (H2CrO7) or trichromic acid (H2Cr3O10).
  5. "Chromic Acid Anodizing" means the electrolytic process by which a metal surface is converted to an oxide surface coating in a solution containing chromic acid.
  6. "Chromium" means hexavalent chromium.
  7. "Chrome Plating:Control Equipment;" means any device which reduces emissions from the emissions collection system.
  8. "Decorative Chrome Plating" means the process by which chromium is electrodeposited from a solution containing compounds of chromium onto an object resulting in a chrome layer 1 micron (0.04 mil.) thick or less.
  9. "Emission factor" means the mass of chromium emitted during a test conducted in the emissions collection system in accordance with ARB Test Method 425, divided by the ampere-hours consumed by the tanks in the tested emissions collection system expressed as the mass of chromium emitted per ampere-hour of electrical current consumed.
  10. "Emissions collection system" means a device or apparatus used to gather chromium emissions from the surface of a chrome plating or chromic acid anodizing tank or tanks.
  11. "Facility" means a business or businesses engaged in chrome plating or chromic acid anodizing which are owned or operated by the same person or persons and are located on the same parcel or on contiguous parcels.
  12. "Facilitywide emissions from hard chrome plating or chromic acid anodizing" means the total emissions from all hard chrome plating or chromic acid anodizing at the facility over a calendar year. Emissions shall be calculated as the sum of emissions from the emissions collection system at the facility. The emissions from an emissions collection system shall be calculated by multiplying the emissions factor for that emissions collections system by the sum of ampere-hours consumed during that year for all of the tanks served by the emissions collection system.
  13. "Hard Chrome Plating" means the process by which chromium is electrodeposited from a solution containing compounds of chromium onto an object resulting in a chrome layer thicker than 1 micron (0.04 mil.).
  14. "Plating Tank" means any container used to hold a chromium or chromic acid solution for the purpose of chrome plating or chromic acid anodizing.
  15. "Uncontrolled chromium emissions from a hard chrome plating or chromic acid anodizing facility" means the chromium emissions from the emissions collection systems at the facility calculated as if no control equipment is in use. For the purpose of determining compliance with this rule the uncontrolled chromium emissions shall be calculated using an emissions factor based on tests conducted in accordance with ARB Test Method 425 or 14 mg/ampere-hour, whichever is less.
  16. "Cooling Tower" means a device which evaporates circulated water to remove heat from a commercial process, building, or a refrigerator, and transfers the heat to the ambient air.
  17. "May" means that a provision is permissive.
    "Must" means that a provision is mandatory.
Section 210:  Collection Efficiency: The overall performance of an air cleaning device in terms of the ratio of material collected to the total input to the collector unless specific size fractions of the contaminant are stated or required.
Section 211: Combustible or Flammable Solid Waste: Any garbage, rubbish, trash, rags, paper, boxes, crates, excelsior, ashes, offal, carcasses of dead animals, or any other combustible or flammable refuse matter which is in solid form.
Section 212: Combustible Refuse: Any solid or liquid combustible waste material containing carbon in a free or combined state.
Section 213: Combustion Contaminants: Matter discharged into the atmosphere from the burning of any kind of material, excluding carbon dioxide and water.
Section 214: Condensed Fumes: Particulate matter generated by the condensation of vapors evolved after volatilization from the molten or liquid state, generated by sublimation, distillation, calcination or chemical reaction, when these processes create airborne particles.
Section 215: Continuous Flow Conveying Methods:Transporting of materials at uniform rates of flow or at the rates generated by the production process.

Section 215.5: "Control equipment" means any device which reduces emissions from a facility or source.
Section 216: Control Strategy: A combination of measures designed to reduce air contaminant emission or to prevent or interfere with same.
Section 216.1: Determination of Compliance: A document which is issued during the California Energy Resources Conservation and Development Commission's thermal power plant certification process in place of an Authority to Construct. For the purpose of these Rules and Regulations, a Determination of Compliance shall be considered equivalent to and subject to the same rules and regulations as an Authority to Construct. Wherever a rule states "Authority to Construct", it shall be interpreted as "Authority to Construct or Determination of Compliance".
Section 217: District: The Lake County Air Quality Management District.
Section 218:

District Board: The Board of Supervisors of the County of Lake sitting as the Board of Directors of the Lake County Air Quality Management District.

218.5 Air Toxic Control Measure for Perchloroethylene - Dry Cleaning Operations

For the purpose of Section 468, the following definitions shall apply:

  1.  "Adsorptive cartridge filter" means a replaceable cartridge filter that contains diatomaceous earth or activated clay as the filter medium.
  2.  "Cartridge filter" means a replaceable cartridge filter that contains one of the following as the filter medium: paper, activated carbon, or paper and activated carbon. A cartridge filter contains no diatomaceous earth or activated clay. Cartridge filters include, but are not limited to: standard filters, split filters, "jumbo" filters, and all carbon polishing filters.
  3.  "Closed-loop machine" means dry cleaning equipment in which washing, extraction, and drying are all performed in the same single unit (also known as dry-to-dry) and which recirculates perchloroethylene-laden vapor through a primary control system with no exhaust to the atmosphere during the drying cycle. A closed-loop machine may allow for venting to the ambient air through a fugitive control system after the drying cycle is complete and only while the machine door is open.
  4. "Converted machine" means an existing vented machine that has been modified to be a closed-loop machine by eliminating the aeration step, installing a primary control system, and providing for recirculation of the perchloroethylene-laden vapor with no exhaust to the atmosphere or workroom during the drying cycle. A converted machine may allow for venting to the ambient air through a fugitive control system after the drying cycle is complete and only while the machine door is open.
  5. "Cool-down" means the portion of the drying cycle that begins when the heating mechanism deactivates and the refrigerated condenser continues to reduce the temperature of the air recirculating through the drum to reduce the concentration of perchloroethylene in the drum.
  6.  "Date of compliance" means the time from the effective date of this control measure in the district until a facility must be in compliance with the specific requirements of this control measure.
  7.  "Desorption" means regeneration of an activated carbon bed, or any other type of vapor adsorber by removal of the adsorbed solvent using hot air, steam, or other means.
  8.  "Dip tank operations" means the immersion of materials in a solution that contains perchloroethylene, for purposes other than dry cleaning, in a tank or container that is separate from the dry cleaning equipment.
  9. "District" means the Lake County Air Quality Management District.
  10.  "Drum" means the rotating cylinder or wheel of the dry cleaning machine that holds the materials being cleaned.
  11. "Dry cleaning equipment" means any machine, device, or apparatus used to dry clean materials with perchloroethylene or to remove residual perchloroethylene from previously cleaned materials. Dry cleaning equipment may include, but is not limited to, a transfer machine, a vented machine, a converted machine, a closed-loop machine, a reclaimer, or a drying cabinet.
  12. "Dry cleaning system" means all of the following equipment, devices, or apparatus associated with the perchloroethylene dry cleaning process: dry cleaning equipment; filter or purification systems; waste holding, treatment, or disposal systems; perchloroethylene supply systems; dip tanks; pumps; gaskets; piping, ducting, fittings, valves, or flanges that convey perchloroethylene-contaminated air; and control systems.
  13. "Drying cycle" means the process used to actively remove the perchloroethylene remaining in the materials after washing and extraction. For closed-loop machines, the heated portion of the cycle is followed by cool-down and may be extended beyond cool-down by the activation of a control system. The drying cycle begins when heating coils are activated and ends when the machine ceases rotation of the drum.
  14.  "Environmental training program" means an initial course or a refresher course of the environmental training program for perchloroethylene dry cleaning operations that has been authorized by the Air Resources Board according to the requirements of 17 CCR, Section 93110, or approved by the APCO.
  15. "Existing facility" means any facility that operated dry cleaning equipment prior to the effective date of this control measure in the district. Facility relocations, within the same district, shall be considered existing facilities for the purposes of this control measure.
  16.  "Facility" means any entity or entities which: own or operate perchloroethylene dry cleaning equipment, are owned or operated by the same person or persons, and are located on the same parcel or contiguous parcels.
  17. "Fugitive control system" means a device or apparatus that collects fugitive perchloroethylene vapors from the machine door, button and lint traps, still, or other intentional openings of the dry cleaning system and routes those vapors to a device that reduces the mass of perchloroethylene prior to exhaust of the vapor to the atmosphere.
  18. "Gallons of perchloroethylene used" means the volume of perchloroethylene, in gallons, introduced into the dry cleaning equipment, and not recovered at the facility for reuse on-site in the dry cleaning equipment, over a specified time period.
  19. "Halogenated-hydrocarbon detector" means a portable device capable of detecting vapor concentrations of perchloroethylene of 25 ppmv or less and indicating an increasing concentration by emitting an audible signal or visual indicator that varies as the concentration changes.
  20. "Leak" means either a leak of liquid of more than 1 drop every 3 minutes, or an emission of vapor from unintended openings in the dry cleaning system, as indicated by the detection of gas flow by soap bubble solution.
  21. "Materials" means wearing apparel, draperies, linens, fabrics, textiles, rugs, leather, and other goods that are dry cleaned.
  22. "New facility" means a facility that did not operate any dry cleaning equipment prior to the effective date of this control measure in the district. Facility relocations, within the same district, shall not be considered new facilities for the purposes of this control measure.
  23. "Perchloroethylene (Perc)" means the substance with the chemical formula 'C2Cl4', also known by the name 'tetrachloroethylene', which has been identified by the Air Resources Board and listed as a toxic air contaminant in 17 CCR, Section 93000.
  24. "Perchloroethylene dry cleaning" or "dry cleaning" means the process used to remove soil, greases, paints, and other unwanted substances from materials with perchloroethylene.
  25. "Pounds of materials cleaned" means the total dry weight, in pounds, of the materials dry cleaned at the facility, as determined by weighing each load on a scale prior to dry cleaning and recording the value.
  26. "Primary control system" means a refrigerated condenser, or an equivalent closed-loop vapor recovery system approved by the district.
  27. "Reclaimer" means a machine, device, or apparatus used only to remove residual perchloroethylene from materials that have been previously cleaned in a separate piece of dry cleaning equipment.
  28. "Reasonably available", as it applies to an initial course for an environmental training program, means that the course is offered within 100 miles of the district boundaries and that all such courses have a capacity, in the aggregate, that is adequate to accommodate at least one person from each facility in the district required to certify a trained operator at that time.
  29. "Refrigerated condenser" means a closed-loop vapor recovery system into which perchloroethylene vapors are introduced and trapped by cooling below the dew point of the perchloroethylene.
  30. "Secondary control system" means a device or apparatus that reduces the concentration of perchloroethylene in the recirculating air at the end of the drying cycle beyond the level achievable with a refrigerated condenser alone. An "integral" secondary control system is designed and offered as an integral part of a production package with a single make and model of dry cleaning machine and primary control system.
  31. "Self-service dry cleaning machine" means a perchloroethylene dry cleaning machine that is loaded, activated, or unloaded by the customer.
  32.  "Separator" means any device used to recover perchloroethylene from a water-perchloroethylene mixture.
  33. "Still" means a device used to volatilize and recover perchloroethylene from contaminated solvent removed from the cleaned materials.
  34. "Trained operator" means the owner, the operator, or an employee of the facility, who holds a record of completion for the initial course of an environmental training program and maintains her/his status by successfully completing the refresher courses as required.
  35. "Transfer machine" means a combination of perchloroethylene dry cleaning equipment in which washing and extraction are performed in one unit and drying is performed in a separate unit.
  36. "Vapor adsorber" means a bed of activated carbon or other adsorbent into which perchloroethylene vapors are introduced and trapped for subsequent desorption.
  37. "Vented machine" means dry cleaning equipment in which washing, extraction, and drying are all performed in the same single unit and in which fresh air is introduced into the drum in the last step of the drying cycle and exhausted to the atmosphere, either directly or through a control device.
  38. "Waste water evaporator" means a device that vaporizes perchloroethylene-contaminated waste water through the addition of thermal or chemical energy, or through physical action.
  39. "Water-repelling operations" means the treatment of materials with a water-repellent solution that contains perchloroethylene.
Section 219: Dust: Minute solid particles released into the air by natural forces by mechanical processes such as crushing, grinding, milling, drilling, demolishing, shovelling, conveying, covering, bagging, sweeping, etc.
Section 220: Emission: The act of passing into the atmosphere an air contaminant or gas stream which contains an air contaminant.
Section 221: Emission Data: Measured or calculated concentrations, mass or volumes of air contaminants emitted into the atmosphere. Data used to calculate emission data are not emission data.
Section 222: Emission Point: The point located in the horizontal plane and vertical elevation at which an emission enters the atmosphere.
Section 223: Equipment: Any article, machine, equipment or other contrivance, the use of which may cause the issuance of air contaminants, or which may be designed for or used to control air contaminants.
Section 224: Equivalent Method: Any procedure for measuring the concentration of a contaminant other than that specified in the air quality standard for the contaminant which can be shown to the satisfaction of the Air Resources Board or the Air Pollution Control Officer to give equivalent results at or near the level of the air quality standards.
Section 225: Excess Air: An amount of air that exceeds the theoretical quantity of air required for complete combustion.
Section 226: Existing Source of Equipment: Any air contamination source or equipment in use or existent at the use site at the time of adoption of these regulations.

Section 226.1: Facility: Every building, structure, appurtenance, installation, or improvement located on land which is under the same or common ownership or operation, and is on one or more contiguous or adjacent properties.
Section 226.5: Fire Season - Burn Ban: That period of each year from June 1 to the end of fire season, as proclaimed by the Director of the California Department of Forestry and Fire Protection or, in the event that fire and meteorological conditions in the Air Basin differ from those prevailing elsewhere within the California Department of Forestry, Region 1, as proclaimed by the Lake County Board of Supervisors (see applicable Lake County Ordinances for proclamation procedure).
Section 227: Flue: Any duct or passage for air, gases or the like, such as a stack or chimney.

Section 227.1: Gross Megawatt Hour: The amount of electrical energy which could be realized per hour from the expected potential energy of the steam prior to any internal plant electrical requirements, as guaranteed by the turbine generator manufacturer.
Section 227.2: Geothermal Production Well: Any well for which the original purpose is use of a geothermal resource.
Section 227.3: Geothermal Project: Any project involving the use or construction of geothermal exploratory wells, geothermal production wells, steam transmission pipelines, power generating facilities or any other equipment intended for use with a geothermal resource.
Section 227.4: Geothermal Exploratory Well: Any well for which the original purpose is the discovery or evaluation of a geothermal resource.
Section 227.5: Geothermal Steam Stacking Emissions: Any air pollution emissions into the ambient air caused by the release of geothermal steam at the location at which stacking occurs and initiated as the result of a geothermal power plant or geothermal steam transmission line failure (forced outage), scheduled outage, startup or curtailment.
Section 228: Hazardous Air Pollutants (HAP): Those pollutants that are listed in the Federal Clean Air Actís Section 112(b) List of Hazardous Air Pollutants.
Section 229: Hot Mix Asphalt Plant: A plant conveying proportion quantities or batch loading of cold aggregate to a dryer, and heating, drying, screening, classifying, measuring and mixing the aggregate and asphalt for the purpose of paving, construction, industrial, residential or commercial use.
Section 230: Household Rubbish: Papers, cartons, wrapping, not to include rubber products, plastic, roofing materials, petroleum oils, garbage or other materials which create offensive odors.

Section 230.1: Household Backyard Wastes: Prunings, grass, leaves, not to include rubber products, plastic, roofing materials, petroleum oils, garbage or other materials which create offensive odors.
Section 231: Hydrogen Sulfide: A colorless, noxious gas having the molecular formula H2S.
Section 232: Incineration: An operation in which the combustion is carried on for the principal purpose or with the principal result of oxidizing a waste material to reduce its bulk or facilitate its disposal.
Section 233: Industrial Area: Any area for the manufacturing, processing, fabricating, refining, repairing, packaging or treatment of goods, materials, liquids and flammable or explosive matter.
Section 234: Installation: The placement, assemblage or construction of equipment or control apparatus at the premises where the equipment or control apparatus will be used, including all preparatory work at such premises.
Section 235: Measurable Contribution: The contribution (calculated, based upon modeling or measurement) of nitrogen oxides, organic gases or any pollutant to the ambient air in the basin or sub-basin, for which there is a local, state, or federal standard which can be resolved by the best reasonably available analytical methodology. Measurements shall be made no closer than the property line.

Section 235.1: Medical facilities: Medical and dental offices, clinics and hospitals, skilled nursing facilities, research facilities, research laboratories, clinical laboratories, all unlicensed and licensed medical facilities, clinics and hospitals, surgery centers, diagnostic laboratories, and other providers of health care.
Section 236: Micrograms per Cubic Meter (ug/m3): A unit of concentration which is numerically equal to the mass of a contaminant (in micrograms) present in one cubic meter sample of air measured at standard conditions.
Section 237:

Modification: Any physical change in, or change in method of operation of a stationary source which increases the amount of any air pollutant emitted by such source to which an ambient air standard applies, except that:

  1. Routine maintenance, repair or replacement shall not be considered physical changes; and
  2. The following shall not be considered a change in the method of operation provided no permit condition in effect as of the effective date of the Rules is worded otherwise:
  1. An increase in the production rate if such increase does not exceed the operating design capacity of the affected facility;
  2. An increase in hours of operation;
  3. Use of an alternate fuel or raw material, if the source is designed to accommodate such alternate use; or
  4. Use of an an alternate fuel when mandated by any government policy or regulation.
Section 237.5: Maximum Achievable Control Technology (MACT): An emission limitation which is not less stringent than the emission limitation achieved in practice by the best controlled similar source, and which reflects the maximum degree of reduction in emissions that the District, taking into consideration the cost of achieving such emissions reduction, and any non-air quality health and environmental impacts and energy requirements, determines if achievable by the constructed or reconstructed major source (40 CFR 63.41 "Definitions").
Section 238: Most Relevant Effects: Effects which ambient air quality standards are intended to prevent or abate.
Section 239: New Sources or Equipment: Any air pollution source or any equipment constructed or installed after the effective date of these regulations. Any air pollution source, equipment replaced or altered, or processes changed as to have any substantial effect on the production or control of air contaminants. Any air pollution source or equipment moved to another premise involving a change of address. Any equipment purchased and to be operated after effective date of these regulations by a new owner or when a new lessee desires to operate such equipment. Any equipment that is or has been shut down, put out of service or otherwise made inoperative for 180 days and which is to be put back into service.
Section 240:      

Nitrogen Dioxide: A red-brown gas, odorless under atmospheric conditions and having the molecular formula NO2.
240.5 Air Toxics Control Measure for Emissions of Toxic Metals from .Non-Ferrous Metal Melting

For the purpose of Section 469, the following definitions shall apply:

  1. "Aluminum and aluminum-based alloys" means any metal that is at least 80% aluminum by weight.
  2. "ARB Test Method 5" means the test method specified in Title 17, California Code of Regulations, section 94105.
  3. "Clean Aluminum Scrap" means scrap that is composed solely of aluminum or aluminum alloys (including anodized aluminum) and that is free of paints, coatings, rubber, or plastics.
  4. "Copper or copper-based alloy" means any metal that is more than 50 percent copper by weight, including but not limited to brass and bronze.
  5. "District" means the Lake County Air Quality Management District.
  6. "Dust forming material" means any material containing more than 15 percent by weight of particulate matter less than 0.84 millimeter (mm) equivalent diameter as determined by ASTM C136-84a "Standard Method for Sieve Analysis of Fine and Coarse Aggregates" using a number 20 US. Bureau of Standards sieve with 0.84-mm square openings, or an alternate method deemed acceptable by the district Air Pollution Control Officer or ARB Executive Officer.
  7. "Emission collection system" means equipment which is installed for the purpose of directing, taking in, confining, and conveying an air contaminant and which conforms to specifications for design and operation given in Industrial Ventilation, Manual of Recommended Practices, 20th edition, 1988, published by the American Conference of Government and Industrial Hygienists, which is incorporated by reference herein.
  8. "Emission point" means any location where molten metal is or can be exposed to air, including but not limited to, furnaces, crucibles, refining kettles, ladles, tap holes, pouring spouts, and slag channels. A mold or die in which metal is cooling is not considered an emission point.
  9. "Enclosed storage area" means any space used to contain materials that has a wall or partition on at least three sides or three-quarters of its circumference and that screens the material stored therein to prevent emissions of the material to the air.
  10. "Facility" means any real or personal property being used for metal melting activities, which is located on one or more contiguous or adjacent parcels of property in actual contact or separated only by a public roadway or other public right-of-way, and owned or operated by the same person or persons, corporation, government agency, public district, public officer, association, joint venture, partnership, or any combination of such entities.
  11. "Fugitive emission control" means any equipment, activity, or process carried out to reduce emissions resulting either from the storage or handling of dust forming materials or material collected by a particulate matter control system, or the removal of particulate matter from metal melting or pouring that has settled on the ground or other surfaces, or that has escaped from a properly designed and operated emission collection system.
  12. "Good Operating Practices" means specific activities necessary to maintain the original collection and control efficiencies of the air pollution control equipment as designed. These activities include but are not limited to verifying operating specifications such as cleaning cycles, air flow, and velocity; and inspecting equipment such as duct work, blowers, and components of the control equipment through a general maintenance and inspection program.
  13. "Hard Lead" means any alloy containing at least 90 percent lead and more than 0.001 percent arsenic by weight or 0.001 percent cadmium by weight.
  14. "Molten metal" means metal or metal alloy in a liquid state, in which a cohesive mass of metal will flow under atmospheric pressure and take the shape of a container in which it is placed.
  15. "Metal melting furnace" means any apparatus in which metal in a container is brought to a liquid state, including but not limited to reverberatory, cupola, induction, direct arc furnaces, sweat furnaces, and refining kettles. "Metal melting furnace" does not include any apparatus in which the metal is heated but does not reach a molten state such as a sintering furnace or an annealing furnace.
  16. "New sand" means any sand not exposed to the casting process.
  17. "Non-ferrous metal" means lead, copper, zinc, cadmium, arsenic, aluminum, and their alloys.
  18. "Particulate matter" or "PM" means any solid material, except uncombined water, which exists in a finely divided form at standard conditions of temperature and pressure (293 K and 760 mm mercury).
  19. "Particulate matter control system" means any device or series of devices designed and operated in a manner intended to remove fine particulate matter (< 10 um) from an air or gas stream.
  20. "Person" shall have the same meaning as defined in Health and Safety Code section 39047.
  21. "Process emission control" means any equipment installed and operated to control emissions of toxic metals from any emission point as defined in subsection (a)(8).
  22. "Pure Lead" means any alloy that is at least 90 percent lead and contains no more than 0.001 percent cadmium by weight and 0.001 percent arsenic by weight.
  23. "Ringelmann Chart" means the Ringelmann Chart published in the United States Review of Mine Information Circular No. 1C8333, (May 1967), as specified in Health and Safety Code section 41701(b).
  24. "Scrap" means any metal or metal-containing material that has been discarded or removed from the use for which it was produced or manufactured and which is intended for reprocessing. "Scrap" does not include sprues, gates, risers, foundry returns, and similar material intended for remelting that has been generated at the facility as a consequence of casting or forming processes but has not been coated or surfaced with any material containing cadmium, arsenic, or nickel.
  25. "Solder" means any metal in which the sum of the lead and the tin is greater than 50 percent by weight and which is used for the purpose of joining two metals or of joining a metal to any other material.
  26. "Type Metal" means any lead-based alloy used for linotype machines.
Section 241:       Open Outdoor Fire: Any combustion of combustible material of any type outdoors in the open, not in any enclosure where the products of combustion are not directed through a flue.
Section 242:       Operation: Any physical action resulting in a change in the location, form or physical properties of a material, or any chemical action resulting in a change in the chemical composition or the chemical or physical properties of a material.
Section 243:       Operator: Any person constructing, drilling, maintaining or operating facilities or equipment emitting air contaminants. "Operator" includes "owner" when any source of air pollutant is, has been, or is about to be, operated by or under the direction of the owner.
Section 244:       Owner: Any person having a legal or equitable interest in property or equipment subject to these rules, or his legal representative.
Section 245:       Oxidant: A substance that oxidizes a selected reagent that is not oxidizable by oxygen under ambient conditions. It includes ozone, organic peroxides and peroxyacetyl nitrates but not nitrogen dioxides for purposes of these Regulations.
Section 246:       Particulate Matter: Discrete atmospheric particles of liquid, other than uncombined water, or solids, as distinguished from a gas or vapor.
Section 247:       Parts per Million (PPM): (v/v) a volumetric unit of gas concentration which is numerically equal to the volume of gaseous contaminant present in one million volumes of air or steam.

Section 247.1: Permissive Burn Day: A day during which the Air Resources Board declares that certain specified outdoor burning is allowed for each air basin.
Section 248:       Person: Any person, firm, association, organization, partnership, business trust, corporation or company. Any State or local governmental agency or public district, or any officer or employee thereof. The United States or its agencies, to the extent authorized by local law.
Section 248.5: Prescribed Burning: The planned application of fire to vegetation on lands selected in advance of such application, where any of the purposes of burning are specified in the definition of agricultural burning as set forth in Health and Safety Code Section 39011.
Section 249:       Prevailing Visibility: The greatest visibility which is attained or surpassed around at least half of the horizon circle but not necessarily in continuous sectors, as determined by the procedure given in "Manuals of Surface Observation", United States Weather Bureau.
Section 250:       Refuse: Anything thrown away or rejected or worthless or useless; waste, rubbish; including but not restricted to domestic garbage, lawn and shrubbery trimmings; commercial wastes such as garbage, cardboard, paper; industrial wastes.
Section 251:       Residential-Commercial Area: Any area used for single or multiple family dwelling purposes, including all accessory uses and facilities; any retail sales facility, professional offices, facilities for institutional and recreational uses and facilities and highway service activities not to include industrial areas as defined in Section 233.

Section 251.1: Roadways: Surfaces on which motor vehicles operate and any shoulder which extends from the edge of the traveled way. This includes, but is not limited to, highways, roads, streets, parking areas, driveways, and haul roads.

Section 251.3: Sand and gravel operation: Any aggregate-producing facility operating in alluvial deposits.
Section 252:       Standard Conditions: As used in these Regulations refers to a gas temperature of zero (0) degrees C and a gas pressure of seven hundred and sixty (760) Torr.
Section 253:       Standard Cubic Foot of Gas: The amount of gas that would occupy a volume of one (1) cubic foot if free of combined water at standard conditions. When applied to gaseous combustion products, "standard cubic foot" also implies adjustment of gas volume to that which would result at a concentration of twelve percent (12%) carbon dioxide or fifty percent (50%) excess air.
Section 254:       Stationary Source: A unit or aggregation of units of air contaminant emitting articles, machines, equipment or other contrivances, all of which are determined by the Air Pollution Control Officer to be related to one another through a similar product, raw material or function.
Section 254.1:, Steam Transmission Lines: The pipelines through which the steam is transmitted from well(s) to a muffler or power plant.
Section 255:       Sulfur Dioxide: A colorless, irritating gas under atmospheric conditions and having a molecular formula SO2.

Section 255.1: Surfacing: The act of exposing or covering any surface used for purposes of pedestrian, vehicular, or non vehicular travel including, but not limited to, roads, road shoulders, streets, alleys, lanes, driveways, parking lots, playgrounds, trails, squares, plazas, and fairgrounds.
Section 256:       Tepee or Wigwam Burner: A burner of wood wastes, consisting of a single burning chamber having the general features of a truncated cone and generally used in conjunction with sawmills, lumber mills and similar activities.
Section 257:       Total Reduced Sulfides (TRS): Reduced sulfur contained in hydrogen sulfide, mercaptans, dimethyl sulfide, diethyl disulfide or other organic sulfide compounds, all expressed as hydrogen sulfide. Sulfur dioxide, sulfur trioxide or sulfuric acid mist are not included in the determination of TRS.
Section 258:       Tons: Mass units equal to two thousand (2,000) pounds (avoirdupois standard) or 907.18 kilograms (metric).
Section 259:       Underfire Air: Air introduced into a teepee or wigwam burner or other type of incineration device beneath the fuel pile or into the primary combustion chamber.

Section 259.1: Visible Emissions: Any emission or releases from any point or area source containing particulate material that are visually detectable without the aid of instruments. This includes, but is not limited to, asbestos debris found outside of containment at a job site.
Section 260:       Visibility Reducing Particles: Atmospheric particles resulting in the scattering of light in the vision spectrum.
Section 269:       Wearing Surface: Any external aggregate layer subject to mechanical attrition or deterioration due to impacts from, but not limited to, pedestrian and vehicular use.
Section 270:       Wildland Vegetation Management Burning: The act of using prescribed burning conducted by a public agency, or through a cooperative agreement or contract involving a public agency, to burn land predominantly covered with chaparral (as defined in Title 14, California Administrative Code, Section 1561.1), trees, grass or standing brush.