An Investigation of Ozone Related Data and Development of a Model to Evaluate Ozone Episodes for Exceptional Event Criteria

Date of Award


Document Type

Capstone Project


Environmental Policy & Mgmt

Degree Name

Master of Applied Science


Environmental Policy & Mgmt


Steven Arnold


Air Quality Legislation; Environmental Legislation; Exceptional Events Rule; NAAQS; ozone; Ozone Transport; photochemical smog; Remote Sensing; Screening Model


The EPA promulgated the Exceptional Events Rule codifying guidance regarding exclusion of monitoring data from compliance decisions due to uncontrollable natural or exceptional events. This capstone examines documentation systems utilized by agencies requesting data be excluded from compliance decisions due to exceptional events. A screening tool is developed to determine whether an event would meet exceptional event criteria. New data sources are available to enhance analysis but evaluation shows many are unusable in their current form. The EPA and States must collaborate to develop consistent evaluation methodologies documenting exceptional events to improve the efficiency and effectiveness of the new rule. To utilize newer sophisticated data, consistent, user-friendly translation systems must be developed.

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