UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

Ms. Karen Magliano, Manager 

Air Quality Data Branch 

Planning and Technical Support Division

Air Resources Board 

California Environmental Protection Agency

P.O. Box 2815 

Sacramento, CA 95812 

Dear Ms. Magliano: 

Thank you for your timely submission of the 

for Small Districts in California. We have reviewed the submitted document and 

it meets the minimum requirements set fo

suggestions for next year’s network plan. 

annual network plan, it does not constitute approval of t

proposed in the plan for the future. We will continue to work with 

plan to review proposed system changes.

We also want to thank you for your timely submission of the California Air Reso

Board’s 2010 Monitoring Network Assessment Report, as required under 40 CFR Part 58.10. 

We recognize that preparing the network assessment was a significant project and we appreciate 

your effort. We plan on providing feedback to all agencies on net

winter 2011. 

If you have any questions regarding this letter, please feel free to contact me at (415) 

972-3851 or Meredith Kurpius at (415) 947

 

 

 

 

 

 

 

Enclosure 

cc: Ken Stroud, CARB 

Mike Miguel, CARB 

Pheng Lee, CARB 

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

REGION IX 

75 Hawthorne Street 

San Francisco, CA 94105

October 29, 2010 

Planning and Technical Support Division

Environmental Protection Agency

Thank you for your timely submission of the 2010 Annual Monitoring Network 

We have reviewed the submitted document and have found

it meets the minimum requirements set forth under 40 CFR Part 58.10. We have included 

suggestions for next year’s network plan. While this letter serves as official approval of the 

annual network plan, it does not constitute approval of the system modifications that are 

proposed in the plan for the future. We will continue to work with the districts represented in the 

system changes. 

We also want to thank you for your timely submission of the California Air Reso

Board’s 2010 Monitoring Network Assessment Report, as required under 40 CFR Part 58.10. 

We recognize that preparing the network assessment was a significant project and we appreciate 

your effort. We plan on providing feedback to all agencies on network assessments during the 

If you have any questions regarding this letter, please feel free to contact me at (415) 

or Meredith Kurpius at (415) 947-4534. 

Sincerely, 

/s/ 

Matthew Lakin, Manager 

Air Quality Analysis Office 

Air Division 

Annual Monitoring Network Report 

have found that 

We have included 

as official approval of the 

he system modifications that are 

the districts represented in the 

We also want to thank you for your timely submission of the California Air Resources 

Board’s 2010 Monitoring Network Assessment Report, as required under 40 CFR Part 58.10. 

We recognize that preparing the network assessment was a significant project and we appreciate 

work assessments during the 

If you have any questions regarding this letter, please feel free to contact me at (415) 
Comments on 2010 CARB’s Network Plan for Small Agencies 

Please update next year’s annual network plan to reflect the following comments: 

• The network plan and the associated site survey reports provide a great deal of valuable 

information and in many ways exceeds EPA’s requirements. However, there remain a 

few required fields that were not covered in either the network plan or site survey reports 

which are: 

- Were Precision/Accuracy reports submitted to AQS according to App. A? 

- Was the annual data certification submitted according to App A? 

- Start date for each monitor (App. C) 

- Distance between collocated monitors (App. E) 

- Probe material, if applicable (App. E) 

• Mojave Desert AQMD (which includes Antelope Valley information) has not submitted a 

network plan in either 2009 or 2010. EPA requests that CARB work with EPA and 

Mojave Dessert to ensure that information for this area is reflected in a network plan for 

2011. 

• EPA is aware of the following sites that were not listed in the network plan: 

- Blythe: 060659003 

- Willits Justice Center 

- Redding – Buckeye 

- Redding – Toyon 

- Shasta Lake – La Mesa 

We do not know the official status of any of these sites but wanted CARB to be aware of 

their potential existence. 

• In addition to the PM2.5 continuous FEMs listed on page 25, EPA provided funding to 

Mendocino County to operate a PM2.5 continuous FEM at Fort Bragg and to North Coast 

to operate a PM2.5 continuous FEM at Weaverville. We have not confirmed that either 

of these sites is operational but wanted CARB to be aware of their potential existence.