Review of Remaining Defined Terms in Clark County Section 1 (“Definitions”) Relative to 

Current Clark County Rulebook and Applicable SIP

Rule citation Term

Rescind 

from 

SIP?

Evaluation Relative to 

Current CC Rulebook

Evaluation Relative to Clark 

County Portion of Existing 

Applicable SIP

Section 1 (“Definitions”): 

Subsection 1.1

Affected Facility Defer Only used in definition of 

EUSGU, 51.165 does not 

define this term either. 

SIP section 23 (“Continuous 

Monitoring by Fossil Fuel-Fired 

Steam Generators”) relies on this 

term.

Section 1 (“Definitions”): 

Subsection 1.6

Air Pollution Control 

Committee

Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The substantive rule to which it 

mainly applied, Section 3 (“Air 

Pollution Control Committee”), 

was deleted without replacement 

at 74 FR 57051 (November 3, 

2009).

Section 1 (“Definitions”): 

Subsection 1.11

Area Source Yes No longer used in NSR, 

replaced with use of term 

“Minor source”, which is 

defined in Section 12.1.

The term “area source” is not used 

in any applicable Clark County 

SIP rule.

Section 1 (“Definitions”): 

Subsection 1.12

Atmosphere Yes Used a lot, but rely on 

dictionary definition as 

sufficient.

The definition of this term in SIP 

section 1.12 is essentially the 

same as the dictionary definition. 

Section 1 (“Definitions”): 

Subsection 1.16

Board Yes Used as both Hearing Board 

and CC Board of County 

Commissioners, not used 

alone.

SIP section 1.16 refers to the 

District Board of Health of Clark 

County, which no longer has 

responsibility over the air 

pollution control program in Clark 

County

Section 1 (“Definitions”): 

Subsection 1.23

Commercial OffRoad Vehicle RacingYes Term no longer used in 

AQR’s. Confirmed with word 

search.

The term “commercial off-road 

vehicle racing” is not used in any 

applicable Clark County SIP rule.

Section 1 (“Definitions”): 

Subsection 1.26

Dust Defer Replaced by definition of 

“fugitive dust” and/or rely on 

dictionary definition. 

SIP section 27 (“Particulate 

Matter from Process Weight 

Rate”) uses this term.

Section 1 (“Definitions”): 

Subsection 1.28

Existing Facility Yes Replaced by Section 0 term 

“existing stationary source”. 

Also SIP definition is only 

per 1971, which is not 

appropriate.

The term “existing facility” is not 

used in any applicable Clark 

County SIP rule.

Section 1 (“Definitions”): 

Subsection 1.29

Existing Gasoline 

Station

Defer Term no longer used in 

AQR’s. Confirmed with word 

search.

SIP section 52 relies on this term.

Section 1 (“Definitions”): 

Subsection 1.30

Fixed Capital Cost Yes Used in definition of 

reconstructed. Rely on 

dictionary definition.

This term is used in connection 

with the term “reconstruction,” 

was is approved in SIP section 0. 

The SIP section 0 definition 

incorporates the definition in 40 

CFR 63.2, which includes “fixed 

capital cost.” Thus, there is no 
need to retain this defined term in 

section 1.

Section 1 (“Definitions”): 

Subsection 1.36

Fumes Defer Used in one rule, rely on 

dictionary definition. 

SIP section 27 (“Particulate 

Matter from Process Weight 

Rate”) uses this term.

Section 1 (“Definitions”): 

Subsection 1.40

Health District Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

SIP section 1.40 refers to the 

Clark County Health District, 

which no longer administers the 

air pollution control program in 

Clark County.

Section 1 (“Definitions”): 

Subsection 1.41

Hearing Board Yes Hearing Board rules not in 

SIP, therefore term not 

needed.

The substantive rule to which it 

mainly applied, Section 7

(“Hearing Board”), was deleted 

without replacement at 62 FR 

34641 (June 27, 1997).

Section 1 (“Definitions”): 

Subsection 1.44

Integrated Sampling Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The term “integrated sampling” is 

not used in any applicable Clark 

County SIP rule.

Section 1 (“Definitions”): 

Subsection 1.51

Mist Defer Term no longer used in 

AQR’s. Confirmed with word 

search.

Existing SIP section 1.51 is used 

in connection with existing SIP 

section (“uncombined water”), for 

which deferral is recommended.

Section 1 (“Definitions”): 

Subsection 1.57

New Gasoline Station Defer Term no longer used in 

AQR’s. Confirmed with word 

search.

Existing SIP section 52 relies on 

this term.

Section 1 (“Definitions”): 

Subsection 1.58

New Source Defer Used several times as “new 

source or modification. OK to 

rely on dictionary definition.

SIP section 26 relies on this term.

Section 1 (“Definitions”): 

Subsection 1.60

NIC Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The abbreviation “NIC” is not 

used in any applicable Clark 

County SIP rule.

Section 1 (“Definitions”): 

Subsection 1.70

Point Source Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The term “point source” is not 

used in any applicable Clark 

County SIP rule.

Section 1 (“Definitions”): 

Subsection 1.81

Single Source Defer Term no longer used in 

AQR’s. Confirmed with word 

search.

SIP section 26 relies on this term.

Section 1 (“Definitions”): 

Subsection 1.83

Smoke Yes Use Dictionary definition. The term is used SIP section 26 

(“Emission of Visible Air 

Contaminants”) but is essentially 

the same as the term as defined in 

the dictionary. Thus, there is no 

need to retain this defined term.

Section 1 (“Definitions”): 

Subsection 1.84

Source of Air 

Contaminant

Yes Used in Section 4 and 7. OK 

to rely on dictionary 

definition.

The term in SIP section 1.84 

defines “source of air 

contaminant” as anything which 

emits any air contaminant. As 

such, the term is self-evident and 

need not be retained as a separate 

defined term.
Section 1 (“Definitions”): 

Subsection 1.87

Standard 

Commercial 

Equipment

Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The term “standard commercial 

equipment” is not used in any 

applicable Clark County SIP rule.

Section 1 (“Definitions”): 

Subsection 1.88

Standard Conditions Defer Term no longer used in 

AQR’s. Confirmed with word

search.

SIP section 30 (“Incinerators”) 

uses this term.

Section 1 (“Definitions”): 

Subsection 1.91

Stop Order Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The term “stop order” is not used 

in any applicable Clark County 

SIP rule.

Section 1 (“Definitions”): 

Subsection 1.95

Uncombined Water Defer Used is Section 16 and 

Section 0 definition of PM. 

OK to rely on dictionary 

definition.

The term is used in SIP section 26 

(“Emission of Visible Air 

Contaminants”) and is an air 

pollution term of art not found in 

a standard dictionary.

Section 1 (“Definitions”): 

Subsection 1.97

Vapor Disposal 

System

Yes Term no longer used in 

AQR’s. Confirmed with word 

search.

The term could not be found in 

any of the applicable SIP rules in 

which it might reasonably be 

found (i.e., SIP sections 50, 51, 52 

or 60).