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RULE 130 - DEFINITIONS

Except as otherwise specifically provided in these rules and 

regulations, and except where the context indicates otherwise, 

words used in these rules and regulations are used in exactly 

the same sense as the same words are used in the Health and 

Safety Code of the State of California, the Clean Air Act, and 

the Code of Federal Regulations 40 CFR 52.21. Where the federal 

regulations of 40 CFR 52.21 refer to the responsibilities of the 

administrator of the U.S. Environmental Protection Agency, the 

term Administrator shall be construed to mean Control Officer.

General Provisions

Except as provided or defined below, the definitions of 40 CFR 

52.21 (b), in effect on November 14, 2014, excluding the 

definition provided in 40 CFR 52.21(b)(33), are incorporated 

herein by reference and made part of this Rule.

(i) The following incorporated provisions of 40 CFR Part 

52.21 are revised as follows:

a. The term “administrator” shall read as follows:

1) “EPA administrator” in 40 CFR 52.21(b)(17), 

(b)(37)(i), (b)(43), (b)(48)(ii)(c), (b)(50)(i), 

(b)(51), (l)(2) and (p)(2); and

2) “Air Pollution Control Officer” elsewhere, as 

defined in Rule 130(a)(5).

b. The phrase “paragraph (q) of this section” in 40 CFR 

52.21(l)(2) and (p)(1) and shall read as follows: the 

public notice and comment provisions of Rule 220 

(b)(5) through (10).

Definitions

(a1) ACTUAL EMISSIONS: The definition of “actual emissions” 

contained in 40 CFR 52.21(b)(21), which is otherwise 

incorporated by reference, is revised to read as set forth below 

whenever reference is made to that term or 40 CFR 52.21(b)(21):

(i) Actual emissions means the actual rate of emissions of a 

pollutant from an emissions unit, as determined in 

accordance with paragraphs (a1)(ii)-(iv) of this rule.

(ii) In general, actual emissions as of a particular date 

shall equal the average rate, in tons per year, at which 

the unit actually emitted the pollutant during a twoyear period which precedes the particular date and which 
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is representative of normal source operation. The APCO

shall allow the use of a different time period upon a 

determination that it is more representative of normal 

source operation.

(iii) Actual emissions shall be calculated using the unit’s 

actual operating hours, production rates, and types of 

materials processed, stored, or combusted during the 

selected time period.

(iv) The APCO may presume that source-specific allowable 

emissions for the unit are equivalent to the actual 

emissions of the unit.

(v) For any emissions unit which has not begun normal 

operations on the particular date, actual emissions 

shall equal the potential to emit of the unit on that 

date.

(a32) AGRICULTURAL OPERATION: The growing and harvesting of 

crops, or the raising of fowl, animals or bees as a gainful 

occupation, or forest management, or range improvement or in the 

improvement of land for wildlife and game habitat, or disease or 

pest prevention.

(a432) AIR CONTAMINANT: Any discharge, release, or other 

propagation into the atmosphere directly, or indirectly, caused 

by man and includes, but is not limited to, smoke, charred 

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

particulate matter, acid, or any combination thereof.

(a543) AIR POLLUTION ABATEMENT OPERATION: Any operation which 

has as its essential purpose a significant reduction in the 

emission of air contaminants or the effect of such emission.

(a65) AIR POLLUTION CONTROL OFFICER (APCO, or Control Officer):

The executive officer appointed by the Board of Directors of the 

District pursuant to Chapter 7 of Part 3 of Division 26 of the 

California Health and Safety Code (HSC) in effect on November 

14, 2014, to carry out the following duties:

(i) Appoint District personnel, pursuant to HSC Section 40751

and subject to the direction of the District Board, including 

any deputies necessary for the prompt and faithful discharge of 

the Air Pollution Control Officer’s duties.

(ii) Observe and enforce, pursuant to HSC Section 40752, all of 

the following:

(A) Part 3 and Part 4 of Division 26 of the 

HSC(commencing with Section 41500).

(B) All orders, regulations, and rules prescribed by 

the District Board.
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(C) All variances and standards which the District 

Hearing Board has prescribed.

(D) All permit conditions imposed pursuant to Section 

42301 and 42301.10.

(iii) Observe and enforce, pursuant to HSC Section 40753, all 

provisions of Division 12 (commencing with Section 

24000) of the Vehicle Code relating to the emission or 

control of air contaminants, except Sections 27157, 

27157.5, 27158, and 27158.5.

(iv) Observe and enforce all rules, regulations, and 

requirements as approved or delegated by the EPA 

Administrator.

(a76) ALLOWABLE EMISSIONS: The definition of “allowable 

emissions” contained in 40 CFR 52.21(b)(16), which is otherwise 

incorporated by reference, is revised to read as set forth below

whenever reference is made to that term or 40 CFR 52.21(b)(16):

(i) The phrase “unless the source is subject to federally 

enforceable limits which restrict the operating rate, or 

hours of operation, or both” shall read, “unless the

source is subject to enforceable limits that restrict 

the operating rate, or hours of operation, or both.”

(ii) Paragraph (iii) shall read as follows: “The emissions 

rate specified as an enforceable permit condition, 

including those with a future compliance date.”

(a874) AMBIENT AIR QUALITY STANDARD: The specific 

concentrations and durations of air pollutants which reflect the 

relationship between intensity and composition of pollution to 

undesirable effects.

(a985) APPROVED COMBUSTIBLES: Paper, cardboard, brush, trees, 

native vegetation or other materials as approved by the Control 

Officer.

(a109) AREA CLASSIFICATIONS: The classification of an areas 

pursuant to the criteria of 40 CFR 52.21(e) and (f). Such 

classified areas near the Northern Sonoma County Air Pollution 

Control District are as follows:

(i) Class I Areas: All areas designated as a Class I area 

pursuant to 40 CFR 51.21(e). The only Class I area 

within 300km of the District is all lands encompassed 

within the Point Reyes National Seashore.

(ii) Class II Areas: All areas not designated as a Class I 

area.
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(b1) BASELINE ACTUAL EMISSIONS: The definition of “baseline 

actual emissions” contained in 40 CFR 52.21(b)(48), which is 

otherwise incorporated by reference, is revised to read as set 

forth below whenever reference is made to that term or 40 CFR 

52.21(b)(48):

(i) Baseline actual emissions means the actual rate of 

emissions of a pollutant from an emissions unit, as 

determined in accordance with paragraphs (b1)(ii) – (iv)

of this rule.

(ii) In general, baseline actual emissions as of a particular 

date shall equal the average rate, in tons per year, at 

which the unit actually emitted the pollutant during a 

24 month period which precedes the particular date and 

which is representative of normal source operation. The 

APCO shall allow the use of a different time period upon 

a determination that it is more representative of normal 

source operation. Baseline actual emissions shall be 

calculated using the unit’s actual operating hours, 

production rates, and types of materials processed,

stored, or combusted during the selected time period.

(iii) The APCO may presume that source-specific allowable 

emissions for the unit are equivalent to the actual 

emissions of the unit.

(iv) For any emissions unit which has not begun normal 

operations on the particular date, baseline actual 

emissions shall equal the potential to emit of the unit 

on that date.

(b2) BASELINE CONCENTRATION: That ambient concentration level 

which exists in the baseline area at the time of the 

establishment of the applicable minor source baseline date. as

determined in accordance with Section 52.21 of the Code of 

Federal Regulations. (Ref: 52.21(b)(13))

(i) A baseline concentration is determined for each 

pollutant for which a minor source baseline date is 

established and shall include: 

(a) The actual emissions, representative of sources in 

existence on the applicable minor source baseline 

date, except as provided in paragraph (ii) below; 

and 

(b) The allowable emissions of major stationary sources 

that commenced construction before the major source 

baseline date, but were not in operation by the 

applicable minor source baseline date. 
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(ii) The following will not be included in the baseline 

concentration and will affect the applicable maximum 

allowable increase(s): 

(a) Actual emissions, from any major stationary source 

on which construction commenced after the major 

source baseline date; and 

(b) Actual emissions increases and decreases, at any 

stationary source occurring after the minor source 

baseline date. 

(b32) BASE UNIT: Any major emitting device, process line, or 

other equipment or grouping thereof, that emits, or has the 

potential to emit, regulated air pollutants; for the purposes of 

this rule, the term base unit shall include, but shall not be 

limited to, any of the following:

1) any major emitting device or process line, or

2) any aggregate production line, including a primary 

crusher and associated crushers, screens, conveyors, 

stackers, and piles, or

3) any cement batch plant, or

4) any asphalt hot mix plant, or

5) any debarker and head rig, or

6) any rip and gangsaw line, or

7) any planing operation, or

8) any cooling tower, or

9) any vent gas treatment system, or

10) any burner/scrubber system, or

11) any stretford system, or

12) any geothermal production, injection, observation, or 

idle steam well and geothermal steam transmission 

system, or aggregation thereof, that provide steam to 

- or are included in the steamfield of a single or 

dual-unit geothermal electrical power generation 

plant, or

13) any onsite combustion device used for power or process 

heat generation, except for emergency standby 

generators or any device that is covered under another 

base unit definition in this rule.

14) any geothermal well drilling operation, or aggregation 

thereof, conducted on a company’s leasehold.

(b43) BEST AVAILABLE CONTROL TECHNOLOGY (BACT): An emission 

limitation based on the maximum degree of reduction of each air 

contaminant subject to regulation under the Clean Air Act 

emitted from or which results from any stationary source or 

modification, which the Control Officer, on a case by case 
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basis, taking into account energy, environmental, and economic 

impacts and other costs, determines is achievable for such 

stationary source through application of production processes 

and available methods, systems, and techniques for control of 

such air contaminants. Said BACT determinations may include a 

design standard, operational equipment specifications, fuel 

restrictions, work practice or combination thereof. In no event 

shall application of BACT result in emissions of any pollutants 

which will exceed the emissions allowed under Rules 490 and 492 

of this regulation. If the reviewing authorityDistrict

determines that technological or economic limitations on the 

application of measurement methodology to a particular emissions 

unit would make the imposition of an emissions standard 

infeasible, a design, equipment, work practice, operational 

standard or combination thereof, may be prescribed instead to 

satisfy the requirements for the application of BACT. (Ref: 

52.21(b)(12))

(c1) COMBUSTION CONTAMINANTS: Matter discharged into the 

atmosphere from the burning of any kind of material, excluding 

carbon dioxide and water.

(c2) CONTROL OFFICER: The Air Pollution Control Officer of the 

District.

(c32) CONTROL STRATEGY: A combination of measures designed to 

reduce air contaminant emissions in accordance with the State 

Implementation Plan for the California North Coast Air Basin.

(d1) DISTRICT: The County Air Pollution Control District as 

required by Section 40002 of the California Health and Safety 

Code or a multi- county unified district authorized by Chapter 

3, Part 3, Division 26 of said code.

(d2) DUST: Minute solid particles released into the air by 

natural forces or by mechanical processes such as crushing, 

grinding, milling, drilling, demolishing, shoveling, conveying, 

bagging, sweeping, etc 

(e1) EMISSION: The act of passing into the atmosphere an air 

contaminant or gas stream which contains an air contaminant, or 

the air contaminant so passed into the atmosphere.

(e2) EPISODE ALERT: A condition in an air basin whenever the 

concentration of any air contaminant in that air basin has been 

verified to have reached a predetermined level which threatens 

the ambient air quality standard as defined in Rule 160 
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depending upon the particular topography and meteorology of the 

air basin. "Verified" means the pertinent measuring instrument 

has been checked over the following fifteen-minute period and 

found to be operating correctly.

(g1) GEOTHERMAL OPERATIONS: Those activities related to the 

extraction, transmission, and utilization of geothermal steam 

which may directly, or indirectly, result in air contaminant 

emissions.

(g2) GREENHOUSE GASES (GHGs): A gas that has the capacity to 

create a warming effect in the earth’s atmosphere; for the 

purposes of this rule: carbon dioxide (CO2), nitrous oxide 

(N2O), methane (CH4), hydrofluorocarbons (HFCs), 

perfluorocarbons (PFCs), and sulfur hexafluoride (SF6).

(h1) HEARING BOARD: The appellate review board of the District 

as provided for by Section 40800 of the California Health and 

Safety Code.

(i1) INDIRECT SOURCE: A facility, building, structure or 

installation, or combination thereof, which indirectly results 

in emissions of an air contaminant as a result of traffic 

greater than 20,000 or more vehicles per day within 10 years of 

construction; any new or modified facility which provides in 

excess of 1,000 new parking spaces; or any new or modified 

airport with more than 50,000 operations per year by regularly 

scheduled air carriers, or used by 1,600,000 or more passengers 

per year.

(i2) INSTALLATION: The placement, assemblage or construction 

of equipment or control apparatus at the premises where the 

equipment or control apparatus will be used, and includes all 

preparatory work at such premises

(k1) KRAFT PULP MILL: Any industrial operation which uses for 

a cooking liquor an alkaline sulfide solution containing sodium 

sulfide in its pulping process.

(k2) KRAFT PULP-MILL NON-CONDENSIBLES: The TRS portion of any 

gases and vapors released in a kraft pulp mill from the digester 

flash steam condensers, blow tanks, multiple effect evaporator 

vacuum seal tanks, multiple effect evaporator condensers, and 

condensate strippers.

(k3) KRAFT PULP MILL PRODUCTION: Tons of air-dried unbleached 

kraft pulp produced by a kraft pulp mill, or equivalent. A 
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value equal to 50 percent of the weight of dry wood charged into 

the kraft cooking process may be substituted for those mills 

where a value of air-dried unbleached kraft pulp is not readily 

obtainable.

(k4) KRAFT RECOVERY FURNACE: The combustion device in which 

pulping chemicals are converted to a molten smelt and wood 

solids are incinerated. For these regulations, and where 

present, this term shall include the direct contact evaporator.

(l1) LIME KILN: Any production device in which calcium 

carbonate is thermally converted to calcium oxide.

(m1) MAJOR MODIFICATION: The definition of the term “Major 

Modification ” as defined in 40 CFR 52.21(b)(2), which is 

otherwise incorporated by reference for the purpose of Rules 200 

and 220, shall be revised to read as: any physical change in or 

change in the method of operation that would result in increase 

of a regulated pollutant which exceeds the significant emission 

rates specified in Rule 130(s2).

(m2) MAJOR STATIONARY SOURCE: The definition of the term 

“Major stationary source” as defined in 40 CFR 52.21(b)(1), 

which is otherwise incorporated by reference for the purpose of

Rules 200 and 220, shall be revised to read as: Any stationary 

source which emits, or has the potential to emit, a regulated 

pollutant above which exceeds the significant emission rates 

specified in Rule 130(s2).

(m3) MODELING: A procedure for estimating the ambient air 

concentration of air contaminants based upon emission profiles, 

dispersion simulations or other techniques approved by the 

Environmental Protection Agency, California Air Resources Board 

and the Control Officer. (Ref: 52.21(l))

(m42) MODIFICATION: Any physical change in, or in the method 

of operation of any stationary source which increases the amount 

of any air contaminant emitted into the atmosphere by that 

source.

(n1) NET INCREASE IN EMISSIONS: EMISSIONS INCREASE: The 

definition of “net emissions increase” contained in 40 CFR 

52.21(b)(3) is revised to read as set forth below whenever 

reference is made to that term or 40 CFR 52.21(b)(3):

(i) Net emissions increase means the amount by which the sum 

of the following exceeds zero:
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a. Any increase in actual emissions from a particular 

physical change or change in method of operation at a 

stationary source; and

b. Any other increases and decreases in actual emissions 

at the source that are contemporaneous with the 

particular change and are otherwise creditable.

(ii) An increase or decrease in actual emissions is 

contemporaneous with the increase from the particular 

change only if it occurs between:

a. The date five years before construction on the 

particular change commences; and

b. The date that the increase from the particular change 

occurs.

(iii) An increase or decrease in actual emissions is

creditable only if the Administrator has not relied on 

it in issuing a permit for the source under this

section, which permit is in effect when the increase in 

actual emissions from the particular change occurs. An 

increase or decrease in actual emissions of sulfur

dioxide, particulate matter, or nitrogen oxide, which 

occurs before the applicable minor source baseline date

is creditable only if it is required to be considered in 

calculating the amount of maximum allowable increases 

remaining available. With respect to particulate matter, 

only PM10 emissions can be used to evaluate the net 

emissions increase for PM10.

(iv) An increase in actual emissions is creditable only to 

the extent that the new level of actual emissions 

exceeds the old level.

(v) A decrease in actual emissions is creditable only to the 

extent that:

a. The old level of actual emissions or the old level of 

allowable emissions, whichever is lower, exceeds the 

new level of actual emissions;

b. It is federally enforceable at and after the time 

that actual construction on the particular change 

begins; and

c. It has approximately the same qualitative

significance for public health and welfare as that 

attributed to the increase from the particular

change.

(vi) An increase that results from a physical change at a 

source occurs when the emissions unit on which 

construction occurred becomes operational and begins to 

emit a particular pollutant. Any replacement unit that 

requires shakedown becomes operational only after a 

reasonable shakedown period, not to exceed 180 days.The 
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amount by which the sum of any increase in actual 

emissions from a particular physical change or change in 

method of operation at a stationary source, and any 

other increases and decreases in actual emissions at the 

source that are creditable in accordance with 40 CFR 

52.21(b)(3) and (21), exceeds zero.

(o1) 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.

(o2) ORCHARD,VINEYARD, OR CITRUS GROVE HEATER: Any article, 

machine, equipment or other contrivance, burning any type of 

fuel or material capable of emitting air contaminants, used or 

capable of being used for the purpose of giving protection from 

frost damage.

(o3) ORGANIC GAS: Any gas containing carbon and hydrogen, or 

carbon and hydrogen in combination with any other element.

(o4) OTHER KRAFT MILL SOURCES: Sources of TRS emissions in a 

kraft mill other than recovery furnaces and lime kilns, 

including but not limited to: vents from knotters, brown stock 

washers, smelt tanks, black liquor oxidation systems, tall oil 

recovery operations, and any other vent which contributes over 1 

percent of the total kraft mill TRS emissions.

(o5) OWNER: Includes, but is not limited to, any person who 

leases, supervises or operates equipment, in addition to the 

normal meaning of ownership.

(p1) PARTICULATE MATTER: Any material, except uncombined 

water, which exists in a finely divided form as a liquid or 

solid at standard conditions. Specific size fractions of 

particulate matter are defined as follows:

(i) PM2.5 means particulate matter, both filterable and 

condensable, with an aerodynamic diameter less than or 

equal to a nominal two and one half (2.5) micrometers.

(ii) PM10 means particulate matter, both filterable and 

condensable, with an aerodynamic diameter less than or 

equal to a nominal ten (10) micrometers.

(p2) PERMIT: Refers to either an authority to construct, 

temporary permit to operate or permit to operate, whichever is 

legally in effect. For purposes of prevention of significant 
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deterioration enforceability, the permit to operate will be 

considered a modified authority to construct.

(p3) PERSON OR PERSONS: An individual, public or private 

corporation, political subdivision, agency, board, department or 

bureau of the state, municipality, partnership, copartnership, 

firm, association, trust or estate, or any other legal entity 

whatsoever which is recognized in law as the subject of rights 

and duties.

(p4) POTENTIAL TO EMIT: The maximum capacity of a stationary 

source to emit an air contaminant under its physical and 

operational design, after considering physical and operational 

limitations that are enforceable by conditions imposed by the 

district in both the Authority to Construct and Permit to 

Operate. (Ref: 52.21(b)(4))

(p5) PPM: Parts per million by volume expressed on a dry gas 

basis.

(p6) PRECURSOR: A substance that, when released to the 

atmosphere, forms or causes to be formed or contributes to the 

formation of another or secondary air pollutant for which a 

national ambient air quality standard has been adopted, or 

whose presence in the atmosphere will contribute to the 

violation of one or more national ambient air quality standards. 

Presently identified precursors and secondary pollutants are:

PRESCURSORS SECONDARY POLLUTANTS

Volatile Organic Compounds Photochemical oxidants (Ozone)

 Organic fraction of PM10

Nitrogen Oxides (NOx) Photochemical oxidants (Ozone)

 Nitrogen dioxide (NO2)

 Nitrate fraction of PM10

 Nitrate fraction of PM2.5

Sulfur Oxides (SOx) Sulfur dioxide (SO2)

 Sulfates (SO4)

Sulfate fraction of PM10

Sulfate fraction of PM2.5

(p7) PREVENTION OF SIGNIFICANT DETERIORATION (PSD) INCREMENT: 

The maximum allowable increase of ambient air quality above 

baseline concentration in the three classified areas.

ALLOWABLE PSD INCREMENTS
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micrograms per cubic meter

Class I Class II Class III

Sulfur Dioxide

 annual arithmetic mean 2 20 40

 24-hour maximum* 5 91 182

 3-hour maximum* 25 512 700

Particulate Matter (PM10)

 annual arithmetic mean 4 17 34

 24-hour maximum* 8 30 60

Particulate Matter (PM2.5)

 annual arithmetic mean 1 4 8

 24-hour maximum* 2 9 18

Nitrogen Dioxide

 Annual arithmetic mean 2.5 25 50

* Not to be exceeded more than once a year, in any one 

location.

(p8) PROCESS WEIGHT PER HOUR: The total weight, including 

contained moisture of all materials introduced into any specific 

process which process may cause any discharge into the 

atmosphere. Solid fuels charged will be considered as part of 

the process weight, but liquid and gaseous fuels and combustion 

air will not. The "process weight per hour" will be derived by 

dividing the total process weight by the number of hours in one 

complete operation from the beginning of any given process to 

the completion thereof, excluding any time during which the 

equipment is idle. For continuous processes, the average hourly 

total weight of materials introduced into the process will be 

used in calculations.

(s1) SECTION: Refers to a section of the Health and Safety 

Code of the State of California unless some other statute is 

specifically mentioned.

(s2) SIGNIFICANT: The potential of a new or modified 

stationary source to emit air contaminants that would equal or 

exceed any of the following rates: (Ref: 52.21(b)(23)(i))
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Air Contaminant: Significant Emission Rate

Carbon monoxide: 100 tons per year (tpy)

Nitrogen oxide: 40 tpy

Sulfur dioxide: 40 tpy

Particulate matter: 25 tpy

PM10 15 tpy

PM2.5 10 tpy of direct PM2.5 

emissions; 

40 tpy of sulfur dioxide 

emissions; 

40 tpy of nitrogen oxide 

emissions.

Ozone: 40 tpy of volatile

 organic compounds or 

nitrogen oxides

Lead: 0.6 tpy

Asbestos: 0.007 tpy

Beryllium: 0.0004 tpy

Mercury: 0.1 tpy

Vinyl chloride: 1 tpy

Fluorides: 3 tpy

Sulfuric acid mist: 7 tpy

Hydrogen sulfide (H2S): 10 tpy

Total reduced sulfur

 (including H2S): 10 tpy

Reduced sulfur compounds

 (including H2S): 10 tpy

Municipal waste combustors:

Organic emissions: 3.2 × 10-6 megagrams per year 

(3.5 × 10-6 tons per year) 

(measured as total tetrathrough octa-chlorinated 

dibenzo-p-dioxins and 

dibenzofurans)

Metals emissions: 14 megagrams per year (15 

tons per year) (measured as

particulate matter)

Acid gas emissions: 36 megagrams per year (40 

tons per year) (measured as 

sulfur dioxide and hydrogen 

chloride)

Municipal solid waste landfills:

Nonmethane organic compounds: 45 megagrams per year (50 

tons per year)

Greenhouse Gases:
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For the purpose of Rule 220 only, and not for 

incorporation into the SIP:

as specified in Rule 221.4.1 

or 221.4.3

For the purpose of Regulation 5 only, and not for 

incorporation into the SIP: 

as specified in Rule 221.4.2 

Other pollutants regulated under the Clean Air Act: any 

emissions rate whatsoever (Ref: 52.21(b)(23)(ii)).

Notwithstanding the above significant emission rates for various 

air contaminants, significant also means any net emission 

increase from any new or modified stationary source which would 

be constructed within 10 kilometers of a Class I area and have 

an air quality impact on such area equal to or greater than 1 

microgram per cubic meter (24 hour average). ( Ref: 

52.21(b)(23)(iii))

(s3) SMALL BUSINESS: 

(1) Any business activity in agriculture, general construction, 

special trade construction, retail trade, wholesale trade, 

services, transportation and warehousing, manufacturing, 

generation and transmission of electric power, or a health care 

facility, unless excluded in paragraph (2), that is both of the 

following:

A. Independently owned and operated, and

B. Not dominant in its field of operation.

(2) “Small business” does not include the following 

professional business activities:

A. A financial institution or bank, a trust, a savings 

and loan association, a thrift institution, a consumer 

finance company, a commercial finance company, an 

industrial finance company, a credit union, a mortgage 

and investment banker, a securities broker-dealer, or 

an investment adviser.

B. An insurance company, either stock or mutual.

C. A mineral, oil, or gas broker; a subdivider or 

developer.

D. A landscape architect, an architect, or a building 

designer.

E. An entity organized as a nonprofit institution.

F. An entertainment activity or production, including a 

motion picture, a stage performance, a television or 

radio station, or a production company.

G. A utility, a water company, or a power transmission 

company generating and transmitting more than 4.5 

million kilowatt hours annually.
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H. A petroleum producer, a natural gas producer, a 

refiner, or a pipeline.

I. A business activity exceeding the following annual 

gross receipts in the categories of:

(i) Agriculture, one million dollars ($1,000,000).

(ii) General construction, nine million five hundred 

thousand dollars ($9,500,000).

(iii) Special trade construction, five million 

dollars ($5,000,000).

(iv) Retail trade, two million dollars ($2,000,000).

(v) Wholesale trade, nine million five hundred 

thousand dollars ($9,500,000).

(vi) Services, two million dollars ($2,000,000).

(vii) Transportation and warehousing, one million 

five hundred thousand dollars ($1,500,000).

J. A manufacturing enterprise exceeding 250 employees.

K. A health care facility exceeding 150 beds or one 

million five hundred thousand dollars ($1,500,000) in 

annual gross receipts.

Ref: State Government Code § 11342(h)

(s4) SMELT DISSOLVING TANK: A vessel used for dissolving the 

molten salts (smelt) recovered from the kraft recovery furnace.

(s5) STACKING: The venting of geothermal steam from associated 

unit steam supply transmission line into the atmosphere during 

associated power plant shutdowns (outages), startups or load 

curtailments.

(s6) STANDARD CONDITIONS: As used in these regulations, refers 

to a gas temperature of 20 degrees Centigrade (68 degrees 

Fahrenheit) and a gas pressure of 760 millimeters of mercury 

absolute (14.7 pounds per square inch absolute).

(s7) STANDARD CUBIC METER OF GAS (STANDARD CUBIC FOOT OF GAS): 

The amount of gas that would occupy the specified cubic measure, 

if free of combined water, at standard conditions.

(s8) STATIONARY SOURCE: All units of air contaminant emitting 

articles, machines, equipment or other contrivances, which are 

located on adjacent or contiguous properties under the control 

of the same person (or persons under common control) and all of 

which are determined by the Control Officer to be related to one 

another through a similar product, raw material or function and 

are included in the same standard industrial classification.
NSCAPCD: Regulation 1, Rule 130 DRAFT: 10-916-14 page 16 of 16

DO NOT CITE OR QUOTE

(s9) STEAM GENERATING UNIT: Any furnace or boiler used in the 

process of burning fuel for the purpose of producing steam by 

heat transfer.

(s10) SUBJECT TO REGULATION: Paragraph (ii)(a) of tThe 

definition of the term “Subject to regulation” as defined in 40 

CFR 52.21(b)(49), which is otherwise incorporated by reference, 

shall be revised to read as: “Multiplying the mass amount of 

emissions (tpy), for each of the six greenhouse gases in the 

pollutant GHGs, by the gas’s associated global warming potential 

published at Table A-1 to subpart A of part 98 of this chapter—

Global Warming Potentials.” Paragraph (v) of the definition of 

the term “Subject to regulation” as defined in 40 CFR 

52.21(b)(49), which is otherwise incorporated by reference, 

shall be deleted in its entirety. 

(t1) TOTAL REDUCED SULFUR (TRS): "TRS" means total reduced 

sulfur contained in hydrogen sulfide, mercaptans, dimethyl 

sulfide, dimethyl disulfide or other organic sulfide compounds, 

all expressed as hydrogen sulfide. Sulfur dioxide, sulfur 

trioxide, or sulfuric acid mist, are not to be included in the 

determination of TRS.

(t2) TOXIC AIR CONTAMINANT (TAC): A toxic air contaminant 

(TAC) is any substance identified by the Air Resources Board as 

a toxic air contaminant pursuant to California Health and Safety 

Code Section 39650 et. seq.

(t3) TRADE SECRETS: As used in these rules and regulations, 

Trade Secrets include, but are not limited to, any formula, 

pattern, process, tool, mechanism, compound, procedure, 

production data, or compilation of information which is not 

patented, which is known only to certain individuals within a 

commercial concern who are using it to fabricate, produce, or 

compound an article of trade or to perform a service having 

commercial value, and which gives its user an opportunity to 

obtain a business advantage over competitors who do not know or 

use it.