County of Imperial 

I am a resident of the County aforesaid; 

I am over the age of eighteen years, and 

not a party to or interested in the above 

entitled matter. 1 am the principal clerk* 

of the printer of the 

IMPERIAL VALLEY PRESS 

a newspaper of general circulation, 

printed and published daily in the City of 

El Centro, County of lmperial and which 

newspaper has been adjudged a 

newspaper of general circulation by the 

Superior Court of the County of Imperial, 

State of California, under the date of 

October 9, 1951, Case Number 26775; 

that the notice, of which the annexed is 

a printed copy, has been published in 

each regular and entire issue of said 

newspaper and not in any supplement 

thereof on the following dates, to-wit; 

all in the year ZO& 

I certify (or declare) under penalty of 

perjury that the foregoing is true and 

correct 

-/--- - 

Printer, Foreman of the Prinler, or 

Principal Clerk of the Printer 

Dale 

at El Centro, Californ~a. 

Proof of Publication of: 

NOTICE OF PETITION FOR EXCLUSION 

OF PMlO MONITORING DATA AFFECTED BY 

AN EXCEPTIONAL EVENT ON SEPTEMBER 2,2006, 

APRIL 12, 2007 AND JUNE 5,2007 

In March 2007, the U.S. Environmental Protection 

Agency (U.S:EPA) adopted 40 CFR Parts 50 and 

51, Treatment of Data Influenced by Exceptional 

Events. This regulation gives states the authority to 

exclude air quality monitoring data from regulatory 

determinations related to exceedances or violations 

of the, National Ambient Air Quality Standards 

(NAAQS). Under this rule, a local air district may 

"flag"'violations of the PMIO standard caused by a 

qualifying natural event and upon documentation 

flagged data will be excludedfrom the noncompliance 

determination of the PMlO standard. 

On September 2, 2006, three lmperial County alr 

monitoring stations recorded PMIO concentrations 

In excess of the federal 24-hour PMIO standard. 

These air monitor~ng stations and their respective 

24-hour PMIO concentrat~ons are as follows: 

Calexico-Ethel Street with 164Fglm3, Calexico-Grant 

Street with 233Fglm3 and Westmorland-W 16' Street 

with 167FglmJ.; 

On April 12,2007, two lmperial County air monitoring 

stations recorded PMIO concentrations in excess 

of the federal 24-hour PMIO standard. These air 

monitoring stations and their respective 24-hour 

PMIO concentrations are as follows: Brawley-Main 

Street with 291Fglm3 and Westmorland-W 1" Street 

with 1 67Fglm3. 

On June 5, 2007 five lmperial County air monitoring 

stations recorded PMl0 concentrations in excess 

of the federal 24-hour PMIO standard. These air 

monitoring stations and their respective 24-hour 

PMIO concentrations are as follows: Calexico-Ethel 

Street with 282Fglm3, Brawley-Main Street with 

281Fglm3, Westmorland-W Is' Street with 226Fglm3, 

El Centro 9"' Street with 200Fglm3 and Niland English 

Road with 162Fglm3. 

A review of the meteorological data for these events 

indicates that measured high winds in the Imperial 

County were the main factor that contributed to the 

violations of the PMIO standard. Therefore, the PMIO 

measurements on September 2, 2006, April 12, 2007 

and June 5, 2007 at the lmperial County air monitors 

meet the criteria for natural events exclusion. 

The Public has an opportunity to review and submit' 

comments on the district's petition for exclusion of 

these events. Written comments will be received 

by the ICAPCD for a period of thirty (30) days 

after publication of this notice. This petition and 

supporting documentation may be examined at the 

Air Pollution Control District Office, 150 South Ninth 

Street, El Centro, CA 92243. 

If you have any questions or would like to have more 

information, please contact lmperial County Air 

Pollution Control District at (760) 482-4606.