Rule 2. Definitions (Adopted 10/22/68)

A. Except as otherwise specifically provided in these Rules

and except where the context otherwise indicates, words used

in these Rules are used in exactly the same sense as the

same words are used in Division 26 of the Health and Safety

Code of the State of California. (Rev. 3/9/76)

Acceptable Incinerator. "Acceptable Incinerator" means any

device or contrivance designed to consume combustible refuse

without creating objectionable odor, smoke, or contaminants

in excess of specified emission limits. An acceptable

incinerator must have a chimney or flue. (Revised 5/23/72)

Air Contaminant. "Air Contaminant" or "Air Pollutant" means

any discharge, release, or other propagation into the

atmosphere and includes but is not limited to, smoke,

charred paper, dust, soot, grime, carbon, fumes, gases,

odors, particulate matter, acids or any combination thereof.

(Revised 6/23/81)

Air Pollution Abatement Operation. "Air Pollution Abatement

Operation" means any operation which has as its essential

purpose a significant reduction in:

1.The emission of air contaminants; or,

2.The effect of such emission.

Air Pollution Control Officer. "Air Pollution Control

Officer" means the Air Pollution Control Officer or his duly

authorized assistants and deputies. (Added 3/26/74)

Air Quality Standards. "Air Quality Standards" as used in

these Regulations refers to those ambient air quality

standards as promulgated by State or Federal pollution

control agencies or as described in these Regulations.

(Added 5/23/72, Revised 7/18/72)

Atmosphere. "Atmosphere" means the air that surrounds the

earth but does not include the general volume of gases

contained in any bona fide building.

Authority to Construct. "Authority to Construct" means a

written permit issued by the Ventura County Air Pollution

Control District for the construction, erection,

installation, assembling, modification, or replacement of

any facility including any article, machine, equipment or

contrivance the use of which may cause the issuance,

reduction, control or elimination of air contaminants.

(Added 5/23/72)

Batch Operation. "Batch Operation" means an operation which

groups a finite number of objects together for the same

process at the same time. Each group may or may not go

through identical previous or subsequent manufacturing

steps. The "Batch Operation" frequency may range from less

than once per week to no more than three times in an eight

hour shift. A "Batch Operation" shall not be construed to

include the loading or unloading of organic liquids. (Added


Best Available Control Technology (BACT). "Best Available

Control Technology" means the most stringent emission

limitation or control technology for an emissions unit


1. Has been achieved in practice for such emissions

unit category, or

2. Is contained in any implementation plan approved

by the Environmental Protection Agency for such

emissions unit category. A specific limitation or

control shall not apply if the owner or operator

of such emissions unit demonstrates to the

satisfaction of the Air Pollution Control Officer

(APCO) that such limitation or control technology

is not presently achievable, or

3. Any other emission limitation or control

technology, including, but not limited to,

replacement of such emissions unit with a lower

emitting emissions unit, application of control

equipment or process modifications, determined by

the APCO to be technologically feasible for such

emissions unit and cost effective as compared to

the BACT cost effectiveness threshold adopted by

the Ventura County Air Pollution Control Board.

In defining emissions unit categories. the APCO may take

into account the function of the emissions unit, the

capacity of the emissions unit, the annual throughput of the

emissions unit and the location of the emissions unit with

respect to electricity or fuels needed to achieve an

emission limitation or control technology. (Added 9/28/76,

Revised 6/20/78, 6/19/79, 1/10/84, 10/22/91)

Board. "Board" means the Air Pollution Control Board of the

Air Pollution Control District of Ventura County.

Combustible Refuse. "Combustible Refuse" means any solid or

liquid combustible waste material containing carbon in a

free or combined state.

Combustion Contaminants. "Combustion Contaminants" means

particulate matter discharged into the atmosphere from the

burning of any kind of material containing carbon in a free

or combined state.

Construction. "Construction" means the erection,

installation, assembling, modification, or replacement of

any article, machine, equipment or contrivance.

Construction begins when any of the following occurs; ground

is broken, equipment is moved into position, or any

connection or attachment is done to or for the equipment in

question. (Added 5/23/72)

Control Strategy. "Control Strategy" means a combination of

measures designed to reduce air contaminant emissions to

attain and maintain ambient air quality standards. (Added


Crude Oil. "Crude Oil" means any naturally occurring,

unrefined petroleum liquid. (Added 6/20/78)

District. "District" shall mean the Ventura County Air

Pollution Control District. (Added 1/29/74)

Dust. "Dust" means minute solid particles released into the

air by natural forces or by mechanical processes such as

crushing, grinding, milling, drilling, demolishing,

shoveling, conveying, covering, bagging, sweeping, etc.

(Added 5/23/72)

Effluent. "Effluent" means the total volume of gases and/or

liquids and/or solids emitted from an emission point.

(Revised 5/23/72)

Emission. "Emission" means the act of passing into the

atmosphere of air contaminant or a gas stream which may or

may not contain an air contaminant or the material so passed

into the atmosphere. (Revised 5/23/72)

Emission Data. "Emission Data" are measured or calculated

concentrations or weights of air contaminants emitted into

the ambient air. Data used to calculate emission data are

not emission data. (Added 1/29/74)

Emission Point. "Emission Point" means any point from which

any air contaminants are released into the atmosphere.

(Added 5/23/72)

Emission Standards. "Emission Standards" as used in these

Regulations means U.S. Federal (EPA), State of California

(ARB) or Ventura County Air Pollution Control District

standards of limits for air contaminant emissions, whichever

are the most restrictive. (Added 5/23/72, Revised 7/18/72)

Equipment. Any operation, article, machine, equipment or

contrivance which may emit or reduce the emissions of any

air contaminant or affected pollutant. (Added 11/19/85)

Exempt Organic Compounds. "Exempt Organic Compounds" means

any of the following compounds: carbon monoxide (CO); carbon

dioxide (CO2); metallic carbides (M-C) or carbonates

(M-CO3); ammonium carbonate ((NH4)HCO3(NH4)CO2NH2); carbonic

acid (CO(OH)2); methane (CH4); methylene chloride

(dichloromethane); 1,1,1-trichloroethane (methyl

chloroform); 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); 1,1,1-trifluoro-2,2-

dichloroethane (HCFC-123); 2-chloro-1,1,1,2-

tetrafluoroethane (HCFC-124); pentafluoroethane (HFC-125);

1,1,2,2-tetrafluoroethane (HCFC-134); 1,1,1,2-

tetrafluoroethane (HCFC-134a); 1,1-dichloro-1-fluoroethane

(HCFC-141b); 1-chloro-1,1-difluoroethane (HCFC-142b);

1,1,1-trifluoroethane (HCFC-143a); 1,1-difluoroethane (HCFC-

152a); and perfluorocarbon (PFC) compounds which fall into

these classes:

1. cyclic, branched, or linear, completely

fluorinated alkanes,

2. cyclic, branched, or linear, completely

fluorinated ethers with no unsaturations,

3. cyclic, branched, or linear, completely

fluorinated tertiary amines with no unsaturations,


4. sulphur containing perfluorocarbons with no

unsaturations and with sulfur bonds only to carbon

and fluorine.

Perfluorocarbon compounds will be assumed to be absent from

a product or process unless a manufacturer or facility

operator identifies the specific individual compounds (from

the broad classes of perfluorocarbon compounds) and the

amounts present in the product or process and provides an

EPA approved test method which can be used to quantify the

specific compounds.

(Added 5/12/92, Revised 12/15/92)

Existing Equipment. "Existing Equipment" means all

equipment which is in use or is under actual construction as

of the date of rule adoption. (Revised 5/23/72, 7/18/72)

Experimental or Research Operations. (Added 4/22/80)

"Experimental or Research Operations" mean those operations

to which a preponderance of the following characteristics


1. Not producing a product for commercial use or


2. The primary objective is not to produce an

immediate profit.

3. The primary objective is to advance the


4. Frequently accompanied by literature search,

theoretical studies and computer modeling.

5. Operations are under direct control of engineers

or scientists.

6. Theoretical solutions are evaluated by hardware


7. Limited quantities of hardware are built for

test purposes.

8. Hardware may incorporate special instrumentation

for design and performance evaluation.

9. Hardware frequently is sub-scale, pilot plant

scale, incomplete system components, breadboard

systems, or may be constructed from boiler plate

or other materials not suitable for a commercial


10. Hardware is subject to continuing modification,

may be destroyed in testing or scrapped upon


11. Except for life performance demonstration,

tests are usually for short duration or at reduced

operating levels.

Fleet Vehicle. "Fleet Vehicles" are gasoline powered motor

vehicles as defined by the Motor Vehicle Code, Division I,

Section 416 of the State of California Vehicle Code and

operated from one business or governmental entity. (Added


Frost Protection. "Frost Protection" means the protection

of agricultural crops against damage from frost or cold


Gasoline. "Gasoline" means any petroleum distillate having

a Reid vapor pressure of 4.0 pounds per square inch or

greater, which is sold or intended for sale for use in motor

vehicles or engines and is commonly or commercially known or

sold as gasoline. (Added 5/23/72)

Hazardous Material. "Hazardous Material" means dangerous,

poisonous, corrosive, oxidizing, volatile, flammable,

explosive or toxic materials for which Federal, State or

Ventura County industrial safety or other limits have been

established. (Added 5/23/72)

Loading Facility. "Loading Facility" shall mean any

aggregation or combination of organic liquid loading

equipment which is located so that all the organic liquid

loading outlets for such aggregation or combination of

loading equipment can be encompassed within any circle of

300 feet in diameter. (Added 6/25/74)

Major Source. A stationary source which emits or has

permitted emissions of 25 or more tons per year of an air

contaminant. (Added 6/19/79, Revised 1/10/84)

Modified Emissions Unit:

1. Any physical change to any emissions unit, which

would result in an emission increase or for which

an application to bank emission reduction credits

is submitted to the District, or

2. Any change in method of operation of any

emissions unit, which would result in an emission

increase or for which an application to bank

emission reduction credits is submitted to the

District, or

3. Any change in hours of operation or throughput,

which would result in an emission increase and

would necessitate a revision to a permit

condition, or for which an application to bank

emission reduction credits is submitted to the


4. Notwithstanding the previous paragraph of this

subsection, prior to December 31, 1992, an

emissions unit will not be considered to be

modified if an application to increase the

throughput or hours of operation of an emissions

unit is submitted and the following conditions are


a. The requested throughput is no more than

1.2 times an actual throughput of the

emissions unit during any 12 month

consecutive period since January 10, 1984, or

b. The requested hours of operation are no

more than 1.2 times the number of hours of

operation of the emissions unit during any 12

month consecutive period since January 10,

1984, and

c. The requested throughput or hours of

operation will not cause the violation of any

applicable federal, state or district laws,

rules, regulations, agreements or orders,

including any permit conditions applied

pursuant to Rule 29.A.

5. A change in ownership, or routine maintenance or

repair, shall not be considered a physical change

or change in method of operation.

(Added 10/22/91)

Motor Vehicle. "Motor Vehicle" is a vehicle which is

self-propelled as defined in the California Vehicle Code,

Division I, Section 415. (Added 6/25/74)

Noxious Mist. "Noxious Mist" means a mist which is harmful,

destructive, distasteful, obnoxious, offensive, or injurious

to physical or mental health. (Added 5/23/72)

Non-Mobile Equipment. "Non-Mobile Equipment" is equipment

which does not need to be registered under the Vehicle Code

of the State of California. (Added 5/23/72)

Opacity. "Opacity" means the degree to which emissions

reduce the transmission of light and obscure the view of the

background. (Added 5/23/72)

Operation. "Operation" means any physical action resulting

in a change in a location, form, or physical properties of a

material or any chemical action resulting in a change in the

chemical composition, chemical or physical properties of a


Orchard Heater. "Orchard Heater" means any article,

machine, equipment or contrivance burning any kind of fuel,

which is designed, used, maintained, or capable of being

used for protection of agricultural crops against frost or

cold weather; provided, however, that the devices which are

commonly known as wind machines are not included in the

terms "Orchard Heater" or "Heater".

Organic Solvents. "Organic Solvents" are any liquids

containing organic compounds which are used as dissolvers,

viscosity reducers or cleaning agents. These liquids are

principally derived from petroleum and include petroleum

distillates, chlorinated hydrocarbons, chlorofluorocarbons,

ketones, and alcohols. Solutions, emulsions, and

dispersions of water and soap, or water and detergent are

not organic solvents. Soaps and detergents are water based

surfactants. (Revised 5/8/90)

Outer Continental Shelf Area (OCS). "Outer Continental

Shelf Area" means any offshore waters for which the District

has been designated the corresponding onshore area by the

U.S. Environmental Protection Agency, Anacapa Island, and

San Nicolas Island (Added 1/10/84, Revised 1O/22/9l).

Particulate Matter. "Particulate Matter" means any material

except uncombined water which exists in a finely divided

form and is a liquid or solid at standard conditions. Dust

shall also be considered as particulate matter. (Revised


Particulate Matter (PM10). "Particulate matter (PM10)"

means particulate matter with an aerodynamic diameter equal

to or less than 10 micrometers. (Added 10/22/91)

Permit to Operate. "Permit to Operate" means a written

permit issued by the Ventura County Air Pollution Control

District for the operation of any facility, article,

machine, equipment, or other contrivance the use of which

may cause the issuance, reduction, control, or elimination

of air contaminants (Added 5/23/72).

Permitted Emissions. "Permitted Emissions" means those

emissions which are imposed on a Permit to Operate limiting

the maximum quantity of each air pollutant which a source

can emit. These limits shall be expressed in pounds per

hour, and tons per year. Permitted emissions shall be

determined pursuant to Rule 29.B. (Added 6/19/79, Revised


Person. "Person" means any person, corporation, government

agency, public officer, association, joint venture,

partnership or any combination of such, jointly or

separately, operating in concert for any common objective

related to the purposes of this Regulation. It includes the

owner, lessor, lessee, tenant, licensee, manager, and

operator, or any of such, of an emission point or any source

operation related thereto, or of any interest in such

emission point or source operation. (Revised 5/23/72)

Photochemically Reactive Solvent. "Photochemically Reactive

Solvent" is any solvent with an aggregate of more than 20

percent of its total volume composed of the chemical

compounds classified below or which exceeds any of the

following individual percentage composition limitations

referred to the total volume of solvent:

1. A combination of hydrocarbons, alcohols,

aldehydes, esters, or ketones having an olefinic

or cyclo-olefinic type of unsaturation: 5 percent;

2. A combination of aromatic compounds with eight

or more carbon atoms to the molecule except

ethylbenzene: 8 percent.

(Added 5/23/72)

PPM. "PPM" means parts per million by volume. (Added


Process Weight. "Process Weight" means the total weight of

all materials introduced into a source operation including

solid fuels, but excluding combustion air and liquids and

gases used solely as fuels or as a means of conveyance.

Liquids and gases shall be included only in the process

weight to the extent that they chemically react in the

formation of the final product or to the extent that they

remain in combined form as an integral part of the final

product. Process weight rate means a rate established as


1. For continuous or long run steady state source

operation, the total process weight for the entire

period of continuous operation or for a typical

portion thereof, divided by the number of hours of

such period or portion thereof.

2. For cyclical or batch source operation, the

total process weight for a period which covers a

complete operation or integral number of cycles,

divided by the hours of actual process operation

during such periods, excluding any time during

which the equipment is idle.

(Revised 5/23/72)

Public Record. "Public Record" means any record made

available to the public by law containing information

relating to the conduct of the public's business that is

prepared, owned, used or retained by the District, except

"trade secrets" as defined in Regulation IX, Rule 200,

Paragraph C. (Added 1/29/74)

Reactive Organic Compounds. "Reactive Organic Compounds"

(ROC) is any compound containing at least one atom of carbon

except those compounds identified in this Rule as Exempt

Organic Compounds. This term and definition shall replace

the following terms and definitions wherever they appear in

the District's Rules and Regulations: organic compound,

organic gases, organic liquid, organic materials, organic

vapor, volatile organic compounds and hydrocarbons.

(Revised 11/3/81, 1/28/92, 5/12/92)

Record. "Record" means handwriting, typewriting, printing,

photostating, photographing, and every other means of

recording upon any form of communication or representation,

including letters, words, pictures, sounds, or symbols, or

combinations thereof, and all papers, maps, magnetic or

paper tapes, photographic films and prints, magnetic or

punched cards, discs, drums, and other documents. (Added


Reduction of Animal Matter. "Reduction of Animal Matter"

means processing animal matter by any process, including

rendering, cooking, drying, dehydration, digestion,

evaporation, and protein concentration but not including any

processing of food for human consumption. (Revised 5/23/72)

Regulation. "Regulation" means one of the major categories

of the rules of the Air Pollution Control District of

Ventura County.

Rule. "Rule" means a rule of the Air Pollution Control

District of Ventura County.

Schedule of Increments of Progress. "Schedule of Increments

of Progress" means a statement of dates when various steps

are to be taken to bring a source of air contaminants into

compliance with emission standards and shall include, to the

extent feasible, the following:

1. The date of submittal of the final plan for the

control of emissions of air contaminants from that

source to the Air Pollution Control District.

2. That date by which contracts for emission

control systems or process modifications will be

awarded, or the date by which orders will be

issued for the purchase of component parts to

accomplish emission control or process


3. The date of initiation of on-site construction

or installation of emission control equipment or

process change.

4. The date by which on-site construction or

installation of emission control equipment or

process notification is to be completed.

5. The date by which final compliance is to be


6. Such other dates by which other appropriate and

necessary steps shall be taken to permit close and

effective supervision of progress toward timely


(Added 8/17/76)

Section. "Section" means the section of the Health and

Safety Code of the State of California unless some other

regulation is specifically indicated. (Revised 5/23/72)

Solid Particulate Matter. "Solid Particulate Matter"

includes any material which is or would become solid at

standard conditions of temperature and pressure. (Added

5/23/72, Revised 7/18/82)

Source Operation. "Source Operation" means the last

operation preceding the emission of an air contaminant which


1. Results in a separation of the air contaminants

in the process material or in the conversion of

the process materials into air contaminants as in

the case of combustion of fuel, and,

2. Is not an air pollution abatement operation.

Standard Conditions. "Standard Conditions" means a gas

temperature of 70 degrees Fahrenheit (21.1 degrees

Centigrade) and a gas pressure of 14.7 pounds per square

inch (760 mm. Hg) absolute. Results of all analyses and

tests shall be calculated and reported at this gas

temperature and pressure unless otherwise called for.

(Revised 5/23/72)

Startup. "Startup" means the setting in operation of an

affected facility for any purpose. (Added 5/23/72)

Stationary Source. Any building, structure, facility, or

installation which emits or may emit any affected pollutant

directly or as a fugitive emission.

"Building, structure, facility, or installation" means

all pollutant emitting activities, including activities

located in California coastal waters adjacent to the

District boundaries, which:

1. belong to the same industrial grouping, and

2. are located on one or more contiguous or

adjacent properties (except for activities

located in coastal waters), and

3. are under the same or common ownership,

operation, or control or which are owned or

operated by entities which are under common


Pollutant emitting activities shall be considered as

part of the same industrial grouping if they belong to

the same two-digit Standard Industrial Classification

code, or if they are part of a common production

process. (Common production process includes

industrial processes, manufacturing processes,

extractive processes, and any connected processes

involving a common raw material or product.)

"California Coastal Waters" means that area between the

California coastline and a line starting at the

California-Oregon border at the Pacific Ocean

thence to 42.0 north, 125.5 west

thence to 41.0 north, 125.5 west

thence to 40.0 north, 125.5 west

thence to 39.0 north, 125.0 west

thence to 38.0 north, 124.5 west

thence to 37.0 north, 123.5 west

thence to 36.0 north, 122.5 west

thence to 35.0 north, 121.5 west

thence to 34.0 north, 120.5 west

thence to 33.0 north, 119.5 west

thence to 32.5 north, 118.5 west

and ending at the California-Mexico border at the

Pacific Ocean. (Added 1/10/84)

"Cargo Carriers" includes trains dedicated to a

specific source, and marine vessels. The emissions

from all marine vessels which load or unload at the

source shall be considered as emissions from the

stationary source while such vessels are operating in

District waters and in California coastal waters

adjacent to the District. The emissions from vessels

shall include reactive organic compound vapors that are

displaced into the atmosphere; fugitive emissions;

combustion emissions in District waters; and emissions

from the loading and unloading of cargo. The emissions

from all trains dedicated to a specified stationary

source, while operating in the District, including

directly emitted and fugitive emissions, shall be

considered as emissions from the stationary source.

(Added 1/10/84)

"Common operations" includes operations which are

related through dependent processes, storage, or

transportation of the same or similar products or raw

material. The emissions within District boundaries and

California coastal waters from cargo carriers

associated with the stationary source shall be

considered emissions from the stationary source.

"Contiguous Property" means two or more parcels of land

with a common boundary or separated solely by a private

roadway or other public right-of-way. (Added 1/10/84)

"Fugitive emissions" means those emissions which could

not reasonably pass through a stack, chimney, vent or

other functionally equivalent opening.

(Added 5/23/72, Revised 6/20/78, 6/19/79, 1/10/84, 11/19/85,


B. Except as otherwise specifically provided in these Rules

and except where the context otherwise indicates,

abbreviations used in these Rules are as follows:

B.T.U. - British Thermal Unit(s)

cal. - calorie(s)

c.f.m. - cubic feet per minute

CO - carbon monoxide

CO2 - carbon dioxide

g. - gram(s)

gr. - grain(s)

Hg. - mercury

H2S - hydrogen sulfide

hr. - hour

in. - inch(es)

l. - liter(s)

lb. - pound(s)

mg. - milligram(s)

min. - minute

ml. - milliliter(s)

mm. - millimeter(s)

NO - nitric oxide

NO2 - nitrogen dioxide

NOx - oxides of nitrogen

% - percent

ppm - part(s) per million

s.c.f. - standard cubic feet

s.c.f.m. - standard cubic feet per


SO2 - sulfur dioxide

vol. - volume

M or K - thousand(s)

MM - million(s)

(Adopted 5/23/72, Revised and Renumbered 11/21/78)