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The Oregon Administrative Rules contain OARs filed through June 15, 2015
 
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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) 15 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 15 micrograms per cubic meter as determined in accordance with Appendix N of 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 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

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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