Oregon Administrative Rules
Chapter 629 - DEPARTMENT OF FORESTRY
Division 48 - SMOKE MANAGEMENT
Section 629-048-0110 - Characterization and Response to Smoke Incidents, Smoke Intrusions, and National Ambient Air Quality Standards (NAAQS) Exceedances

(1)

(2) When measurements or observations are available, smoke incidents or smoke intrusions are characterized based on particulate matter values over a one-hour average period, or a 24-hour average period from midnight to midnight.

(3) When no particulate matter dataareavailable, smoke incidents or smoke intrusions are determined based on reduction in visibility averaged over a one-hour period using standard National Weather Service visibility observation criteria (Federal Meteorological Handbook No. 1) and a table of reductions keyed tovarious background visibility levels as displayed in Department Directive 1-4-1-601, "Operational Guidance for the Oregon Smoke Management Program."

(4) Smoke incidents andsmoke intrusions will be documented and used to assess annual program performance. Department Directive 1-4-1-601 "Operational Guidance for the Oregon Smoke Management Program" will describe applicable reporting requirements and actions to be taken.

(5) Smoke intrusions thataverage at or abovethe 24-hour average PM2.5 value of 35 microgram per cubic meter (NAAQS exceedance) will be reported to DEQ as soon as possible. Department Directive 1-4-1-601 "Operational Guidance for the Oregon Smoke Management Program" will describe applicable reporting requirements and adaptive management actions to be taken if this event occurs.