- mass associated with elemental carbon;
- mass associated with fine soil (i.e., crustal material);
- mass associated with coarse particulate matter (i.e., PM10 - PM2.5).
Current speciated measurements in aClass I area are used in an empirically derived
equation to estimate light extinction for each day with measurements. Days are ranked
according to their resulting light extinction (measured in deciviews). This ranking is used to
identify the 20% of days with worst and 20% of days with best visibility during each year in the
base period. The 20% worst and best days are examined to estimate appropriate observed
concentrations for the components of PM on “best” and “worst” days.
Observed component concentrations are multiplied by the corresponding relative
response factors to estimate future concentrations for each component on “best” and “worst”
days. Future component concentrations are then inserted into the equation relating light
extinction to concentrations of particulate matter. The resulting estimates for future light
extinction on “best” and “worst” days are compared with observations made during the base
period to see assess the future year visibility improvement.
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD