RULE 1-130 - DEFINITIONS

Except as otherwise specifically provided in these rules and regulations, words used in these rules and regulations are used in exactly the same sense as the same words are used in the federal

Clean Air Act Amendments of 1990 and as amended at the time of application, Title 40 of the Code of Federal Regulations, Part 52.21, and Divisi on 26 of the State of California Health and Safety Code. Where Title 40 of the Code of Federal Regulations, Part 52.21 refers to the responsibilities of the Administrator of the U.S. E nvironmental Protection Agency, the term

Administrator shall be construed to mean Air Pollut ion Control Officer. [Amended 5/6/03, Amended 12/5/06, Amended 2/15/11]

(b2) Best Available Control Technology (BACT):

An emissions limitation based on the maximum degree of reduction of each air contaminant subject to regulation under the federal Clean Air Act Amendments of 1990 and as amended at the time of application emitted f rom or that results from any stationary or portable source or modification, which the Air P ollution Control Officer, on a case by case basis, taking into account energy, environment al, 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 inc lude a design standard, operational equipment specifications, fuel restrictions, work p ractice or combination thereof. In no event shall application of BACT result in emissions of any pollutants that will exceed the

emissions allowed under Rules 1-490 and 1-492 of th is regulation. If the reviewing authority determines that technological or economic limitations on the application of measurement methodology to a particular emissions u nit would make the imposition of an emissions standard infeasible, a design, equipme nt, work practice, operational standard or combination thereof, may be prescribed instead to satisfy the requirements for the application of BACT (40 CFR 52.21(b)(12)).

The BACT process shall be applied to any air contam inants that have been identified as toxic air contaminants (TAC) by the U.S. Environmen tal Protection Agency, the

California Air Resources Board or the Mendocino Cou nty Air Quality Management

District Board. [(b2) Paragraph 2 is not included as part of the SI P]

(g2) Greenhouse Gases (GHGs):

A gas that has the capacity to create a warming eff ect in the earth’s atmosphere; for the purposes of this rule: carbon dioxide (CO2), nitrou s oxide (N2O), methane (CH4), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). [Added 2/15/11](p1) Particulate Matter:

Any material, except uncombined water, that exists in a finely divided form as a liquid or solid at standard conditions. Specific size fracti ons of particulate matter are defined as

follows:

1. PM 2.5 means particulate matter, both filterable and cond ensable, with an

aerodynamic diameter less than or equal to a nomina l two and one half (2.5) micrometers.

2. PM 10 means particulate matter, both filterable and conde nsable, with an

aerodynamic diameter less than or equal to a nomina l ten (10) micrometers. [Amended 2/15/11]

(p7) Precursor:

A substance that, when released to the atmosphere, forms or causes to be formed or

contributes to the formation of another or secondar y air pollutant for which a national ambient air quality standard has been adopted, or w hose presence in the atmosphere will

contribute to the violation of one or more national ambient air quality standards. Presently identified precursors and secondary pollu tants are:

Precursors Secondary Pollutants

Volatile Organic Compounds

a) Photochemical oxidants (ozone O 3 )

b) Organic fraction of PM10

Nitrogen Oxides (NOx) a) Photochemical oxidants (Ozone) b) Nitrogen dioxide (NO 2 ) c) Nitrates NO 3 d) Nitrate fraction of PM10 e) Nitrate fraction of PM2.5

Sulfur oxides (SOx) a) Sulfur dioxide (SO 2 ) b) Sulfates (SO 4 ) c) Sulfate fraction of PM10 d) Sulfate fraction of PM2.5 [Amended 2/15/11](p7) Prevention of Significant Deterioration (PSD) Increment:

The maximum allowable increase of ambient air quali ty above baseline concentration in

the three classified areas.

Allowable PSD Increments 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 (PM 2.5)

Annual Arithmetic Mean 1 4 8

24-hour maximum* 2 9 18

Particulate Matter PM-10

Annual Arithmetic Mean 4 17 34

24-hour maximum* 8 30 60

Nitrogen Dioxide

Annual

Arithmetic Mean 2.5 25 50

* Not to be exceeded more than once a year.

(s2) Significant:

The potential of a new or modified source to emit a ir contaminants that would equal or exceed any of the following rates, calculated on th e basis of 24-hour emissions profiles, except as noted otherwise:

Air Contaminant Significant Emissions Rate

Carbon monoxide 550 lbs. per day Nitrogen oxides 220 lbs. per day Sulfur dioxide 220 lbs. per day Particulate matter 135 lbs. per day PM-10 80 lbs. per day PM2.5 54 lbs. per day of direct PM2.5 emissions; 220 lbs. per day of sulfur dioxide emissions; 220 lbs. per day of nitrogen oxide emissions. Ozone 220 lbs. per day of VOCs * or nitrogen

oxides Lead 3 lbs. per day Asbestos .038 lbs. per day Beryllium .002 lbs. per day Mercury 0.5 lbs. per day Vinyl chloride 5.4 lbs. per day Fluorides 16 lbs. per day Sulfuric acid mist 38 lbs. per dayHydrogen sulfide (H2S) 54 lbs. per day Total reduced sulfur (including H 2 S) 54 lbs. per day Reduced sulfur compounds (including H 2 S): .027 lbs. per day 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 pe r 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: For the purpose of Rule 1-220 only: as specified in Rule 1-221.4 (a) or 1-221.4 (c) For the purpose of Regulation 5 only: as specified in Rule 1-221.4 (b) Other pollutants regulated under the Clean Air Act: any emissions rate whatsoever (52.21(b)(23)(ii)).

Hazardous Air Pollutant (HAP) listed pursuant to Section 112(g)

of the federal Clean Air Act

Amendments of 1990 and as amended at the time of application 10 tons per year of any one HAP 25 tons per year for two or more HAPs

* Volatile Organic Compounds except for ethanol sou rces below the EPA yearly threshold (40 tons per year).

Not withstanding the above significant emissions ra tes for various air contaminants, significant also means any net emissions increase f rom any new or modified stationary

source that would be constructed within 10 kilomete rs of a Class I area and have an air quality impact on such area equal to or greater tha n 1 microgram per cubic meter (24 hour average). (40 CFR 52.21(b)(23)(iii)) The abov e Significant Emissions Rates are not to be used for CEQA determination.