202 ACCEPTED

DIVISION 202

AMBIENT AIR QUALITY STANDARDS AND PSD INCREMENTS

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 OAR 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 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.

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 468A
Stats. Implemented: ORS 468A.025
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

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 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 Environmental Quality Commission 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 Environmental Quality Commission 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 as adopted by the Environmental Quality Commission under OAR 340-200-0040.

Stat. Auth.: ORS 468 & ORS 468A
Stats. Implemented: ORS 468A.025
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

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 & ORS 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 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

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 federal Clean Air Act Amendments of 1977.

(2) DEQ will review the adequacy of the State Implementation Plan on a periodic basis and within 60 days of such time as information becomes available that an applicable increment is being violated. Any Plan revision resulting from the reviews will be subject to the opportunity for public hearing in accordance with procedures established in the Plan.

[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 & ORS 468A
Stats. Implemented: ORS 468A.025
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

340-202-0210

Ambient Air 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 increases in pollutant concentration over the baseline concentration defined in Division 225 must be limited to the PSD increments or maximum allowable increases listed below :

(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

(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:

(i) 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

(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:

(i) annual arithmetic mean = 25 micrograms per cubic meter

(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

(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:

(i) 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 as adopted by the EQC under OAR 340-200-0040.

Stat. Auth.: ORS 468 & 468A
Stats. Implemented: ORS 468A.025
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

340-202-0225

Ambient Air Quality Limits for Maintenance Areas

The following ambient air quality limits have been established for the areas specified for the purpose of the air quality analysis in OAR 340-224-0060, 340-224-0255, and 340-224-0260, if required.

(1) In a carbon monoxide maintenance area, an air quality impact equal to or greater than 0.5 mg/m3 (8 hour average) and 2 mg/m3 (1-hour average).

(2) In a PM10 maintenance area, an air quality impact less than or equal to:

(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 as adopted by the EQC under OAR 340-200-0040.

Stat. Auth.: ORS 468.020
Stats. Implemented: ORS 468A.025
Hist.: DEQ 26-1996, f. & cert. ef. 11-26-96; DEQ 15-1998, f. & cert. ef. 9-23-98; DEQ 1-1999, f. & cert. ef. 1-25-99; DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-028-1935; DEQ 6-2001, f. 6-18-01, cert. ef. 7-1-01; DEQ 11-2002, f. & cert. ef. 10-8-02; DEQ 1-2005, f. & cert. ef. 1-4-05; DEQ 9-2005, f. & cert. ef. 9-9-05; DEQ 3-2007, f. & cert. ef. 4-12-07; DEQ 5-2011, f. 4-29-11, cert. ef. 5-1-11

pcuser, 2013-08-23T21:45:00Z
This history is from 340-224-0060, where these numbers came from. Not sure if the whole rule history applies to these numbers or not. Leave out for SOS to do rule history?