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

Current Clark County Rulebook and Applicable SIP

Rule citation Term Rescind from SIP? Evaluation R elative to Current CC Rulebook Evaluation R elative 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

. T he 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 Off

Road Vehicle Racing Yes 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 noneed to retain this defined te rm 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. T he 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).