EE CompliancePatternTrend

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What is na Exceptional Event? (EE)

Causality Pattern

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Temporal Pattern

According to the EE Rule, observationas can be EE-flagged if the concentration exceeds the standard due to the exceptional event.

• The leftmost figure shows a case when the 'exceptional' concetration raises the level above the standard.
• In the next case, the concentration from controllable sources is sufficient cause the exceedance. Such an exceedance is not a 'but for' case and should not be flagged.
• In the third case, there is no exceedance, hence no justification for EE flag.

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Illustration Exceptional Events, EE and non-EE events by the EE Rule.

1999-2001

2000-2002

2001-2003

2002-2004

2003-2005

2004-2006

2005-2007