OAR 340-208-0610
Clackamas, Columbia, Multnomah, and Washington Counties: Particulate Matter Weight Standards

Except for equipment burning natural gas and liquefied petroleum gas, the maximum allowable emission of particulate matter from any fuel burning equipment:

(1)

Is a function of maximum heat input as determined from Figure 1, except that from existing fuel burning equipment utilizing wood residue, it is 0.2 grain, and from new fuel burning equipment utilizing wood residue, it is 0.1 grain per standard cubic foot of exhaust gas, corrected to 12 percent carbon dioxide;

(2)

Must not exceed Smoke Spot #2 for distillate fuel and #4 for residual fuel, measured by ASTM D2156-65, “Standard Method for Test for Smoke Density of the Flue Gases from Distillate Fuels.”
[NOTE: View a PDF of Figure by clicking on “Tables” link below.]
[NOTE: Publications referenced are available from the agency.]
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Source: Rule 340-208-0610 — Clackamas, Columbia, Multnomah, and Washington Counties: Particulate Matter Weight Standards, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-208-0610.

Last Updated

Jun. 8, 2021

Rule 340-208-0610’s source at or​.us