Fw: Background concentration monitoring station information

Cleveland Holladay 

to: 

Omer Shalev 

07/31/2012 12:34 PM 

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From: Cleveland Holladay/R9/USEPA/US 

To: Omer Shalev/R9/USEPA/US@EPA 

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Omer, 

I am forwarding Eric Albright's emails. 

-Cleve 

Cleve Holladay

Phone 415-947-4140 

U.S. EPA, Region 9, Air Quality Analysis Office (AIR-7) | 75 Hawthorne St., San Francisco, CA 

 94105 

-----Forwarded by Cleveland Holladay/R9/USEPA/US on 07/31/2012 12:33PM -----

To: Cleveland Holladay/R9/USEPA/US@EPA 

From: Eric Albright <ealbright@environcorp.com>

Date: 06/28/2012 04:12PM 

Cc: Omer Shalev/R9/USEPA/US@EPA, Dave Brown <DBrown@spi-ind.com>, George Emmerson 

<GEMMERSON@spi-ind.com>, Shane Young <SYoung@spi-ind.com>

Subject: Background concentration monitoring station information 

Cleve: 

 

For PM2.5 background concentrations, we used data from the monitoring station at the Redding 

Dept. of Health (Station ID 60890004), which is approximately 6.5 miles from the facility, and for 

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NO2 background concentrations we used data from the monitoring station at 468 Manzanita Ave 

in Chico (Station ID 60070002), which is approximately 55.5 miles from the facility. Each station 

is the closest source of ambient data for that pollutant. The next closest monitoring stations that 

include an NO2 analyzer, with distances from the facility are: 

 

 60231004 - Eureka (717 South Ave, Eureka, CA): ~99.7 miles 

 60231005 - 7333 Humboldt Hill Road, Eureka, CA: ~100 miles 

 60450008 – Ukiah (306 E Gobbi St, Ukiah, CA): ~103 miles 

 60450009 – Willits (899 S Main St, Willits, CA): ~92 miles 

 60670002 – North Highlands (7823 Blackfoot Way): ~132 miles 

 61010003 – Yuba City (773 Almond St, Yuba City, CA): ~99.3 miles 

 

None of these stations are closer to the facility, and several are located in different airsheds (e.g., 

the Eureka stations 

 

I’m assuming that the description of how the met data were processed using AERMET in Section 

4.4 of the March 2010 permit application is sufficient. If not, please let me know. 

 

Please let me know if you need anything else to complete your review. 

 

Thanks. 

 

Eric 

 

Eric Albright, PE | Senior Manager

ENVIRON International Corporation

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ealbright@environcorp.com

 

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