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DEPARTMENT OF ENVIRONMENTAL QUALITY

 
DIVISION 202
AMBIENT AIR QUALITY STANDARDS AND PSD INCREMENTS

NOTE: These rules are included in the
State of Oregon Clean Air Act Implementation Plan as adopted by the EQC under OAR
340-200-0040.
340-202-0010
Definitions
The definitions in OAR 340-200-0020,
340-204-0010 and this rule apply to this division. If the same term is defined in
this rule and 340-200-0020 or 340-204-0010, the definition in this rule applies
to this division.
(1) "Approved method" means
an analytical method for measuring air contaminant concentrations described or referenced
in 40 CFR part 50 and Appendices.
(2) "Oregon standard method"
means any method of sampling and analyzing for an air contaminant approved by DEQ.
Oregon standard methods are kept on file by DEQ and include all methods described
in the DEQ Source Sampling Manual and the DEQ Continuous Monitoring Manual referenced
in OAR 340-200-0035(2) and (3), respectively.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A.025
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 18-1979, f. & ef. 6-22-79; DEQ 25-1981, f. & ef. 9-8-81;
DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 4-1993, f. &
cert. ef. 3-10-93; DEQ 19-1993, f. & cert. ef. 11-4-93, Renumbered from 340-031-0105;
DEQ 17-1995, f. & cert. ef. 7-12-95; DEQ 14-1999, f. & cert. ef. 10-14-99,
Renumbered from 340-031-0005; DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01; DEQ 5-2011,
f. 4-29-11, cert. ef. 5-1-11; DEQ 7-2015, f. & cert. ef. 4-16-15
340-202-0020
Applicability and Jurisdiction
Subject to the requirements in this
division and OAR 340-200-0010(3), LRAPA is designated by the EQC to implement the
rules in this division within its area of jurisdiction.
Stat. Auth.: ORS 468.020, 468A.025 &
468A.035
Stat. Implemented: ORS 468A.025,
468A.035 & 468A.135
Hist.: DEQ 11-2013, f. &
cert. ef. 11-7-13; DEQ 7-2015, f. & cert. ef. 4-16-15
Ambient Air Quality Standards
340-202-0050
Purpose and Scope of Ambient Air
Quality Standards
(1) An ambient air quality standard
is an established concentration, exposure time, and frequency of occurrence of an
air contaminant or multiple contaminants in the ambient air that must not be exceeded.
The ambient air quality standards set forth in OAR 340-202-0050 through 340-202-0130
were established to protect both public health and public welfare.
(2) Ambient air quality standards
are not generally used to determine the acceptability or unacceptability of emissions
from a specific source of air contamination. More commonly, the measured ambient
air quality is compared with the ambient air quality standards to determine the
adequacy or effectiveness of emission standards for all sources in a general area.
However, if a source or combination of sources are singularly responsible for a
violation of ambient air quality standards in a particular area, it may be appropriate
to impose emission standards that are more stringent than those otherwise applied
to the class of sources involved. Similarly, proposed construction of new sources
or expansions of existing sources, that may prevent or interfere with the attainment
and maintenance of ambient air quality standards are grounds for issuing an order
prohibiting such proposed construction as authorized by ORS 468A.055 and pursuant
to OAR 340-210-0205 through 340-210-0250, and OAR 340-218-0190. No source may cause
or contribute to a new violation of an ambient air quality standard or PSD increment
even if the single source impact is less than the significant impact level.
(3) In adopting the ambient
air quality standards in this division, the EQC recognizes that one or more of the
standards are currently being exceeded in certain parts of the state. It is hereby
declared to be the policy of the EQC to achieve, by application of a timely but
orderly program of pollution abatement, full compliance with ambient air quality
standards throughout the state at the earliest possible date.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025&
468A.035
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 14-1999, f. & cert.
ef. 10-14-99, Renumbered from 340-031-0010; DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01;
DEQ 7-2015, f. & cert. ef. 4-16-15
340-202-0060
Suspended Particulate Matter
Concentrations of the fraction of suspended
particulate that is equal to or less than ten microns in aerodynamic diameter in
ambient air as measured by an approved method must not exceed:
(1) 150 micrograms of PM10
per cubic meter of air as a 24-hour average concentration for any calendar day.
This standard is attained when the expected number of days per calendar year with
a 24-hour average concentration above 150 micrograms per cubic meter as determined
in accordance with Appendix K of 40 CFR 50 is equal to or less than one at
any site. Concentrations of the fraction of suspended particulate that is equal
to or less than 2.5 microns in aerodynamic diameter in ambient air as measured by
an approved method must not exceed:
(2) 35 micrograms of PM2.5
per cubic meter of air as a 3-year average of annual 98th percentile 24-hour average
values recorded at each monitoring site. This standard is attained when the 3-year
average of annual 98th percentile 24-hour average concentrations is equal to or
less than 35 micrograms per cubic meter as determined in accordance with Appendix
N of 40 CFR 50.
(3) 12 micrograms of PM2.5
per cubic meter of air as a 3-year average of the annual arithmetic mean. This standard
is attained when the annual arithmetic mean concentration is equal to or less than
12 micrograms per cubic meter as determined in accordance with Appendix N of
40 CFR 50.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan as adopted by the Environmental
Quality Commission under OAR 340-200-0040.
Stat. Auth.: ORS 468 & 468A
Stats. Implemented: ORS 468A.025
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 24-1991,
f. & cert. ef. 11-13-91; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 14-1999,
f. & cert. ef. 10-14-99, Renumbered from 340-031-0015; DEQ 6-2001, f. 6-18-01,
cert. ef. 7-1-01; DEQ 5-2010, f. & cert. ef. 5-21-10; DEQ 5-2011, f. 4-29-11,
cert. ef. 5-1-11; DEQ 10-2015, f. & cert. ef. 10-16-15
340-202-0070
Sulfur Dioxide
Concentrations of sulfur dioxide in
ambient air as measured by an approved method for each averaging time must not exceed
the following concentrations:
(1) Annual average: 0.02
ppm as an annual arithmetic mean for any calendar year at any site as measured by
the reference method described in appendix A of 40 CFR part 50 or by an equivalent
method designated in accordance with 40 CFR part 53.
(2) 24-hour average: 0.10
ppm as a 24-hour average concentration more than once per calendar year at any site
as measured by the reference method described in appendix A of 40 CFR part 50 or
by an equivalent method designated in accordance with 40 CFR part 53.
(3) 3-hour average: 0.50
ppm as a three-hour average concentration more than once per calendar year at any
site as measured by the reference method described in appendix A of 40 CFR part
50.
(4) 1-hour average: 0.075
ppm as a three-year average of the annual 99th percentile of the daily maximum 1-hour
average concentration recorded at any monitoring site as determined by appendix
T of 40 CFR part 50 as measured by a reference method based on appendix A or A-1
of 40 CFR part 50, or by a Federal Equivalent Method (FEM) designated in accordance
with 40 CFR part 53.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 24-1991,
f. & cert. ef. 11-13-91; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 14-1999,
f. & cert. ef. 10-14-99, Renumbered from 340-031-0020; DEQ 6-2001, f. 6-18-01,
cert. ef. 7-1-01; DEQ 11-2013, f. & cert. ef. 11-7-13; DEQ 7-2015, f. &
cert. ef. 4-16-15
340-202-0080
Carbon Monoxide
For comparison to the standard, averaged
ambient concentrations of carbon monoxide must be rounded to the nearest integer
in parts per million (ppm). Fractional parts of 0.5 or greater must be rounded up.
Concentrations of carbon monoxide in ambient air as measured by an approved method,
must not exceed:
(1) 9 ppm as an eight-hour
average concentration more than once per year at any site.
(2) 35 ppm as a one-hour
average concentration more than once per year at any site.
Stat. Auth.: ORS 468 & 468A
Stats. Implemented: ORS 468A.025
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 24-1991,
f. & cert. ef. 11-13-91; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 14-1999,
f. & cert. ef. 10-14-99, Renumbered from 340-031-0025; DEQ 6-2001, f. 6-18-01,
cert. ef. 7-1-01
340-202-0090
Ozone
Concentrations of ozone in ambient air
as measured by an approved method must not exceed 0.075 ppm as a daily maximum eight-hour
average concentration. This standard is attained when, at any site the average of
the annual fourth-highest daily maximum eight-hour average ozone concentration is
equal to or less than 0.075 ppm as determined by the method of Appendix I, 40 CFR
50.
Stat. Auth.: ORS 468 & 468A
Stats. Implemented: ORS 468A.025
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 15-1979, f. & ef. 6-22-79; DEQ 7-1980, f. & ef. 3-5-80;
DEQ 4-1982, f. & ef. 1-29-82; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected
9-30-88); DEQ 24-1991, f. & cert. ef. 11-13-91; DEQ 4-1993, f. & cert. ef.
3-10-93; DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-031-0030;
DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01; DEQ 3-2007, f. & cert. ef. 4-12-07;
DEQ 5-2010, f. & cert. ef. 5-21-10
340-202-0100
Nitrogen Dioxide
Concentrations of nitrogen dioxide in
ambient air as measured by a reference method based on appendix F to 40 CFR part
50 or by a Federal equivalent method (FEM) designated in accordance with 40 CFR
part 53 must not exceed:
(1) 0.053 ppm as an annual
average concentration for any calendar year at any site. The standard is met when
the annual average concentration in a calendar year is less than or equal to 0.053
ppm, as determined in accordance with appendix S of 40 CFR part 50 for the annual
standard.
(2) 0.100 ppm as a 3-year
average of the annual 98th percentile of the 1-hour daily maximum concentrations
recorded at any monitoring site. The standards is met when the three-year average
of the annual 98th percentile of the daily maximum 1-hour average concentration
is less than or equal to 0.100 ppm, as determined in accordance with appendix S
of 40 CFR part 50 for the 1-hour standard.
(3) 0.053 ppm as an annual
arithmetic mean concentration as determined in accordance with Appendix S of 40
CFR part 50. The secondary standard is attained when the annual arithmetic mean
concentration in a calendar year is less than or equal to 0.053 ppm, rounded to
three decimal places (fractional parts equal to or greater than 0.0005 ppm must
be rounded up). To demonstrate attainment, an annual mean must be based upon hourly
data that are at least 75 percent complete or upon data derived from manual methods
that are at least 75 percent complete for the scheduled sampling days in each calendar
quarter.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 24-1991,
f. & cert. ef. 11-13-91; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 14-1999,
f. & cert. ef. 10-14-99, Renumbered from 340-031-0040; DEQ 6-2001, f. 6-18-01,
cert. ef. 7-1-01; DEQ 11-2013, f. & cert. ef. 11-7-13; DEQ 7-2015, f. &
cert. ef. 4-16-15
340-202-0110
Particle Fallout
The particle fallout rate as measured
by an Oregon standard method at a location approved by DEQ must not exceed:
(1) 10 grams per square meter
per month in an industrial area.
(2) 5.0 grams per square
meter per month in an industrial area if visual observations show a presence of
wood waste or soot and the volatile fraction of the sample exceeds 70 percent.
(3) 5.0 grams per square
meter per month in residential and commercial areas.
(4) 3.5 grams per square
meter per month in residential and commercial areas if visual observations show
the presence of wood waste or soot and the volatile fraction of the sample exceeds
70 percent.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025&
468A.035
Hist.: DEQ 37, f. 2-15-72,
ef. 3-1-72; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 14-1999,
f. & cert. ef. 10-14-99, Renumbered from 340-031-0045; DEQ 6-2001, f. 6-18-01,
cert. ef. 7-1-01; DEQ 7-2015, f. & cert. ef. 4-16-15
340-202-0130
Lead
The concentration of lead and its compounds
in ambient air must not exceed:
(1) 0.15 micrograms per cubic
meter as a maximum arithmetic mean averaged over a calendar quarter, as measured
by a reference method based on appendix G of 40 CFR part 53 or an equivalent method
designated in accordance with 40 CFR part 53.
(2) The standard is met when
the maximum arithmetic 3-month mean concentration for a 3-year period, as determined
in accordance with appendix R of 40 CFR part, is less than or equal to 0.15 micrograms
per cubic meter.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 85, f. 1-29-75,
ef. 2-25-75; DEQ 1-1983, f. & ef. 1-21-83; DEQ 8-1988, f. & cert. ef. 5-19-88
(corrected 9-30-88); DEQ 24-1991, f. & cert. ef. 11-13-91; DEQ 4-1993, f. &
cert. ef. 3-10-93; DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-031-0055;
DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01; DEQ 5-2010, f. & cert. ef. 5-21-10;
DEQ 11-2013, f. & cert. ef. 11-7-13; DEQ 7-2015, f. & cert. ef. 4-16-15
Prevention of Significant Deterioration
Increments
340-202-0200
General
(1) The purpose of OAR 340-202-0200
through 340-202-0220 is to implement a program to prevent significant deterioration
of air quality in the State of Oregon as required by the FCAA Amendments of 1977.
(2) DEQ will review the adequacy
of the SIP on a periodic basis and within 60 days of such time as information becomes
available that an applicable increment is being violated. Any SIP revision resulting
from the reviews will be subject to the opportunity for public hearing in accordance
with procedures established in the SIP.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 18-1979, f. &
ef. 6-22-79; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 14-1999, f. & cert.
ef. 10-14-99, Renumbered from 340-031-0100; DEQ 7-2015, f. & cert. ef. 4-16-15
340-202-0210
Ambient Air PSD Increments
(1) This rule defines significant deterioration.
In areas designated as Class I, II or III, emissions from new or modified sources
must be limited such that aggregate increases in regulated pollutant concentration
over the baseline concentration, as defined in OAR 340-225-0020, are less than the
following PSD increments or maximum allowable increases:
(a) For Class I areas:
(A) PM2.5:
(i) Annual arithmetic mean
= 1 microgram per cubic meter.
(ii) 24-hour maximum = 2
micrograms per cubic meter.
(B) PM10:
(i) Annual arithmetic mean
= 4 micrograms per cubic meter
(ii) 24-hour maximum = 8
micrograms per cubic meter.
(C) Sulfur dioxide:
(i) Annual arithmetic mean
= 2 micrograms per cubic meter.
(ii) 24-hour maximum = 5
micrograms per cubic meter.
(iii) 3-hour maximum = 25
micrograms per cubic meter.
(D) Nitrogen dioxide: Annual
arithmetic mean = 2.5 micrograms per cubic meter.
(b) For Class II areas:
(A) PM2.5:
(i) Annual arithmetic mean
= 4 micrograms per cubic meter.
(ii) 24-hour maximum = 9
micrograms per cubic meter.
(B) PM10:
(i) Annual arithmetic mean
= 17 micrograms per cubic meter.
(ii) 24-hour maximum = 30
micrograms per cubic meter.
(C) Sulfur dioxide:
(i) Annual arithmetic mean
= 20 micrograms per cubic meter.
(ii) 24-hour maximum = 91
micrograms per cubic meter.
(iii) 3-hour maximum = 512
micrograms per cubic meter.
(D) Nitrogen dioxide: Annual
arithmetic mean = 25 micrograms per cubic meter.
(c) For Class III areas:
(A) PM2.5:
(i) Annual arithmetic mean
= 8 micrograms per cubic meter.
(ii) 24-hour maximum = 18
micrograms per cubic meter.
(B) PM10:
(i) Annual arithmetic mean
= 34 micrograms per cubic meter.
(ii) 24-hour maximum = 60
micrograms per cubic meter.
(C) Sulfur dioxide:
(i) Annual arithmetic mean
= 40 micrograms per cubic meter.
(ii) 24-hour maximum = 182
micrograms per cubic meter.
(iii) 3-hour maximum= 700
micrograms per cubic meter.
(D) Nitrogen dioxide: Annual
arithmetic mean = 50 micrograms per cubic meter.
(2) For any period other
than an annual period, the applicable maximum allowable increase or PSD increment
may be exceeded during one such period per year at any one location.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
[ED. NOTE: Tables referenced are not included in rule text. Click here for PDF copy of table(s).]
Stat. Auth.: ORS 468.020
& 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 18-1979, f. &
ef. 6-22-79; DEQ 8-1988, f. & cert. ef. 5-19-88 (corrected 9-30-88); DEQ 7-1992,
f. & cert. ef. 3-30-92; DEQ 17-1995, f. & cert. ef. 7-12-95; DEQ 14-1999,
f. & cert. ef. 10-14-99, Renumbered from 340-031-0110; DEQ 6-2001, f. 6-18-01,
cert. ef. 7-1-01; DEQ 10-2010(Temp), f. 8-31-10, cert. ef. 9-1-10 thru 2-28-11;
Administrative correction, 3-29-11; DEQ 5-2011, f. 4-29-11, cert. ef. 5-1-11; DEQ
7-2015, f. & cert. ef. 4-16-15
340-202-0220
Ambient Air Ceilings
No concentration of a pollutant may
exceed:
(1) The concentration permitted
under the national secondary ambient air quality standard;
(2) The concentration permitted
under the national primary ambient air quality standard; or
(3) The concentration permitted
under the state ambient air quality standard, whichever concentration is lowest
for the pollutant for a period of exposure.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan as adopted by the EQC under OAR
340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 18-1979, f. &
ef. 6-22-79; DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-031-0115;
DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01; DEQ 7-2015, f. & cert. ef. 4-16-15
340-202-0225
Ambient Air Quality Impact Levels
for Maintenance Areas
The following ambient air quality impact
levels apply to the areas specified for the purpose of the air quality analysis
in OAR 340-224-0060 and 340-224-0260, if required.
(1) In a carbon monoxide
maintenance area, 0.5 mg/m3 (8 hour average) and 2 mg/m3 (1-hour average).
(2) In a PM10 maintenance
area:
(a) 120 ug/m3 (24-hour average)
in the Grants Pass PM10 maintenance area;
(b) 140 ug/m3 (24-hour average)
in the Klamath Falls PM10 maintenance area; or
(c) 140 ug/m3 (24-hour average)
in the Lakeview PM10 maintenance area. In addition, a single source impact is limited
to an increase of 5 ug/m3 (24-hour average) in the Lakeview PM10 maintenance area.
NOTE: This rule is included in the
State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025
& 468A.035
Hist.: DEQ 7-2015, f. &
cert. ef. 4-16-15

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