Oregon Administrative Rules › Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY › Division 206 - AIR POLLUTION EMERGENCIES › Section 340-206-0040 - Special Conditions

Current through Register Vol. 63, No. 7, July 1, 2024
(1) DEQ
			 must issue an "ozone advisory" to the public when monitored ozone values at any
			 site exceed the ambient air quality standard of 0.12 ppm but are less than 0.2
			 ppm for a one hour average. The ozone advisory must clearly identify the area
			 where the ozone values have exceeded the ambient air standard and must state
			 that significant health effects are not expected at these levels, however,
			 sensitive individuals may be affected by some symptoms.
(2) Where particulate is primarily soil from
			 windblown dust or fallout from volcanic activity, episodes dealing with such
			 conditions must be treated differently than particulate episodes caused by
			 other controllable sources. In making a declaration of air pollution alert,
			 warning, or emergency for such particulate, DEQ must be guided by the following
			 criteria:
(a) "Air pollution alert for
			 particulate from volcanic fallout or windblown dust" means particulate values
			 are significantly above a standard but the source is a volcanic eruption or
			 dust storm. In this condition there is no significant danger to public health
			 but there may be a public nuisance created from the dusty conditions. It may be
			 advisable under these circumstances to voluntarily restrict traffic volume
			 and/or speed limits on major thoroughfares and institute cleanup procedures.
			 DEQ will declare an air pollution alert for particulate from volcanic fallout
			 or wind-blown dust when particulate values at any monitoring site exceed or are
			 projected to exceed 800 ug/m3 - 24-hour average and the particulate is
			 primarily from volcanic activity or dust storms, meteorological conditions not
			 withstanding;
(b) "Air pollution
			 warning for particulate from volcanic fallout or windblown dust" means
			 particulate values are very high but the source is volcanic eruption or dust
			 storm. Prolonged exposure over several days at or above these levels may
			 produce respiratory distress in sensitive individuals. Under these conditions
			 staggered work hours in metropolitan areas, mandated traffic reduction, speed
			 limits and cleanup procedures may be required. DEQ will declare an air
			 pollution warning for particulate from volcanic fallout or wind-blown dust when
			 particulate values at any monitoring site exceed or are expected to exceed
			 2,000 ug/m3 - 24-hour average and the particulate is primarily from volcanic
			 activity or dust storms, meteorological conditions not withstanding;
(c) "Air pollution emergency for particulate
			 from volcanic fallout or windblown dust" means particulate values are extremely
			 high but the source is volcanic eruption or dust storm. Prolonged exposure over
			 several days at or above these levels may produce respiratory distress in a
			 significant number of people. Under these conditions cleaning procedures must
			 be accomplished before normal traffic can be permitted. An air pollution
			 emergency for particulate from volcanic fallout or wind-blown dust will be
			 declared by the Director, who must keep the Governor advised of the situation,
			 when particulate values at any monitoring site exceed or are expected to exceed
			 5,000 ug/m3 - 24-hour average and the particulate is primarily from volcanic
			 activity or dust storms, meteorological conditions notwithstanding.