Visible Emissions

340-208-0100

340-208-0110

Visible Air Contaminant Limitations

(1) The emissions standards in this rule do not apply to fugitive emission sources.

(2) The visible emissions standards in this rule are based on a 6-minute average as measured by:

(a) EPA Method 9,

(b) a continuous opacity monitoring system (COMS) installed and operated in accordance with DEQ’s Continuous Monitoring Manual (2014) or 40 CFR Part 60; or

(c) an alternative monitoring method approved by DEQ that is equivalent to EPA Method 9, such as EPA’s Alt Method 082.

(3) For emission sources, other than wood-fired boilers, that existed prior to June 1, 1970 and have not been modified since May 31, 1970:

(a) If located outside a special control area, visible emissions must not equal or exceed:

(A) 40% opacity through December 31, 2019; and

(B) 20% opacity on and after January 1, 2020

(b) If located inside a special control area, visible emissions must not equal or exceed 20% opacity.

(4) For emission sources, other than wood-fired boilers, installed, constructed, or modified on or after June 1, 1970, visible emissions must not exceed 20% opacity.

(5) For wood-fired boilers that existed prior to June 1, 1970 and have not been modified since May 31, 1970, visible emissions must not equal or exceed:

(a) 40% opacity through December 31, 2019 with the exception that emissions may not equal or exceed 55% opacity for 12 minutes in an hour, as the average of two 6-minute Method 9 observation periods.

(b) 20% opacity on or after January 1, 2020, with the exception that:

(A) emissions may not equal or exceed 40% opacity for 12 minutes in an hour, as the average of two 6-minute Method 9 observation periods; and

(B) emissions may not equal or exceed 40% opacity, as the average of all 6- minute Method 9 observation periods during grate cleaning operations provided the grate cleaning is performed in accordance with a grate cleaning plan approved by DEQ.

(6) For wood-fired boilers installed, constructed, or modified after June 1, 1970 but before January 1, 2015, visible emissions must not equal or exceed 20% opacity with the exception that emissions may not equal or exceed 40% opacity for 12 minutes in an hour, as the average of two 6-minute Method 9 observation periods.

(7) For all wood-fired boilers installed, constructed, or modified after January 1, 2015, emissions must not equal or exceed 20% opacity.

(8) By no later than January 1, 2020, all wood-fired boiler emission stacks must have a continuous opacity monitoring system (COMS) installed, certified, maintained, and operated in accordance with DEQ’s continuous monitoring manual or 40 CFR Part 60.

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 468.020 & 468A.025 
Hist.: DEQ 16, f. 6-12-70, ef. 7-11-70; DEQ 4-1993, f. & cert. ef. 3-10-93; DEQ 3-1996, f. & cert. ef. 1-29-96; DEQ 14-1999, f. & cert. ef. 10-14-99, Renumbered from 340-021-0015; DEQ 2-2001, f. & cert. ef 2-5-01; DEQ 8-2007, f. & cert. ef. 11-8-07

jinahar, 2013-12-17T15:44:00Z
Change “source” to “stack or emission point”? “Stack or emission point” are not defined but are used in divisions 234 and 240 for veneer dryers. Each stack or emission point (vent or stack or door opening where emissions come from) should have an opacity limit and should not be averaged. The pulp mill rule says “stack” rather than source.

jinahar, 2013-12-17T15:44:00Z
Do we need this if we include the out in (C)?