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Notice of Availability of the Demonstration of the Occurrence of Two Exceptional Events for March and April 2014

Notice of Availability of the Demonstration of the Occurrence of Two Exceptional Events for March and April 2014

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 and Niland monitors on March 17, March 26, a combined March 30 and April 1, April 12 and 13, and April 25 and 26. (See below).

March 17, 2014
Brawley 24 hr concentration from the Federal Equivalent Method BAM monitor of 190.9 ug/m3

March 26, 2014
Brawley 24 hr concentration from the Federal Equivalent Method BAM monitor of 375.3 ug/m3
Niland 24 hr concentration from the Federal Equivalent Method BAM monitor of 279.7 ug/m3

March 30 and April 01, 2014
Brawley 24 hr concentration from the Federal Reference Method monitor of 220 ug/m3
Brawley 24 hr concentration from the Federal Equivalent Method BAM monitor of 160.5 ug/m3

April 12 and April 13, 2014
Niland 24 hr concentration from the Federal Equivalent Method BAM monitor of 167.5 ug/m3
Brawley 24 hr concentration from the Federal Equivalent Method BAM monitor of 166.8 ug/m3

April 25 and April 26, 2014
Brawley 24 hr concentration from the Federal Equivalent Method BAM monitor of 185.4 ug/m3
Brawley 24 hr concentration from the Federal Equivalent Method BAM monitor of 313.3 ug/m3

The public and all interested parties are encouraged to review and comment on the Draft EE's for March 17, March 26, March/April 30-01, April 12-13, and April 25-26 of 2014 which provide the supporting evidence that on the days indicated in March and April of 2014 the Brawley 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 weather systems that impacted Riverside, Imperial and San Diego 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 February 3, 2017 by close of business.

The Draft EE's for March and April of 2014 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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