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Notice of Availability of the Demonstration of the Occurrence of Two Exceptional Events for May and September 2013

Notice of Availability of the Demonstration of the Occurrence of Two Exceptional Events for May and September 2013

The Imperial County Air Pollution Control District (Air District) has prepared two Draft Exceptional Event (EE) Demonstrations which support the requested exclusion of the measured concentrations at the Brawley, Westmorland and Niland monitors on May 4 and September 7 of 2013 (see below).

May 4 of 2013
Brawley 24 hr concentration from the Federal Reference Method monitor of 192 ug/m3
Westmorland 24 hr concentration from the Federal Reference Method BAM of 155 ug/m3

September 7 of 2013
Niland 24 hr concentration from the Federal Equivalent Method BAM of 159.5 ug/m3

The public and all interested parties are encouraged to review and comment on the Draft EE's for May 4th and September 7th of 2013 which provide the supporting evidence that on may 4th and September 7th of 2013 the Brawley, Westmorland and Niland monitors were impacted by elevated levels of particulate matter of an aerodynamic size less than 10 microns (PM10) caused by winds which followed two weather systems that impacted Riverside, Imperial and Yuma counties. The Draft EE Demonstrations provide the scientific justification for the requested exclusions. The Air District is soliciting and accepting comments for 30 days commencing the date of the publication of this notice. The final closing date for submitting comments is December 5, 2016 by close of business.

The Draft EE's for May 4th and September 7th of 2013 are available for download at the Air District website at www.co.imperial.ca.us, under "Air Pollution". To view the Draft EE demonstrations, please visit the Air Pollution Control District office at 150 S. 9th Street, El Centro. Should you have any questions or concerns please feel free to call our office between 8am and 5pm at (442) 265-1800 and ask for Monica N. Soucier.

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