(6) "New source" means, for purposes of OAR 340-208-0110, any air contaminant source installed, constructed, or modified after June 1, 1970.

(9) "Special Control Area" means an area designated in OAR 340-204-0070.

340-208-0110

Visible Air Contaminant Limitations

(1) Existing sources outside special control areas. No person may emit or allow to be emitted any air contaminant into the atmosphere from any existing air contaminant source located outside a special control area for a period or periods aggregating more than three minutes in any one hour which is equal to or greater than 40% opacity.

(2) New sources in all areas and existing sources within special control areas: No person may emit or allow to be emitted any air contaminant into the atmosphere from any new air contaminant source, or from any existing source within a special control area, for a period or periods aggregating more than three minutes in any one hour which is equal to or greater than 20% opacity.

(3) Exceptions to sections (1) and (2) of this rule:

(a) Where the presence of uncombined water is the only reason for failure of any source to meet the requirement of sections (1) and (2) of this rule, such sections shall not apply;

(b) Existing fuel burning equipment installed on or before June 1, 1970 that has not been modified since June 1, 1970 utilizing wood wastes and located within special control areas shall comply with the emission limitations of section (1) of this rule in lieu of section (2) of this rule.

(4) Opacity is determined in accordance with the procedures specified in the definition of "opacity".

(1) "New source" means, for purposes of OAR 340-226-0210, any air contaminant source installed, constructed, or modified after June 1, 1970.

340-226-0210

Particulate Emission Limitations for Sources Other Than Fuel Burning and Refuse Burning Equipment

(1) No person may cause, suffer, allow, or permit particulate matter emission from any air contaminant source in excess of:

(a) 0.2 grains per standard cubic foot for existing sources, or

(b) 0.1 grains per standard cubic foot for new sources.

(2) This rule does not apply to fuel or refuse burning equipment or to fugitive emissions.

340-228-0210

Grain Loading Standards

(1) Except as provided in sections (2) and (3) of this rule, no person shall cause, suffer, allow, or permit the emission of particulate matter, from any fuel burning equipment in excess of:

(a) 0.2 grains per standard cubic foot for sources installed, constructed, or modified on or before June 1, 1970;

(b) 0.1 grains per standard cubic foot for sources installed, constructed, or modified after June 1, 1970.

(2) For sources burning salt laden wood waste on July 1, 1981, where salt in the fuel is the only reason for failure to comply with the above limits and when the salt in the fuel results from storage or transportation of logs in salt water, the resulting salt portion of the emissions shall be exempted from subsection (1)(a) or (b) of this rule and OAR 340-208-0110. In no case shall sources burning salt laden woodwaste exceed 0.6 grains per standard cubic foot.

(a) This exemption and the alternative emissions standard are only applicable upon prior notice to the Department.

(b) Sources which utilize this exemption, to demonstrate compliance otherwise with subsection (1)(a) or (b) of this rule, shall submit the results of a particulate emissions source test of the boiler stacks bi-annually.

(3) This rule does not apply to solid fuel burning devices that have been certified under OAR 340-262-0500.

340-204-0070

Special Control Areas

The following areas are designated as Special Control Areas:

(1) The counties within the Willamette Valley, including Benton, Clackamas, Columbia, Lane, Linn, Marion, Multnomah, Polk, Washington and Yamhill Counties;

(2) Umpqua Basin;

(3) Rogue Basin;

(4) Within incorporated cities having a population of 4,000 or more, and within three miles of the corporate limits of any such city.