UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

REGION 10 

1200 Sixth Avenue, Suite 900 

Seattle, WA 98101-3140 

OFFICE OF 

AIR, WASTE AND TOXICS 

October 14,2010 

Mr. Anthony Barnack 

Air Monitoring Program 

Oregon Department of Environmental Quality 

811 SW Sixth Avenue 

Portland, OR 97204-1390 

Dear Mr. Barnack: 

We have evaluated the 2010 Oregon Ambient Air Monitoring Network Plan, which 

describes changes to the OR monitoring network for 2010-11. ODEQ proposes the following 

changes to the OR air monitoring network: 

PM10 monitors 

1) Discontinue the Grants Pass (41-033-0114) PM 10 FRM. This site has not had an 

annual second high value above 33% of the NAAQS in the last 10 years. If this monitor is 

the only remaining PM 10 monitor in the Grants Pass PM10 maintenance area, it cannot be 

discontinued unless ODEQ proposes, and EPA agrees, to a revision to the State 

implementation plan (SIP) that identifies a surrogate method of determining compliance with 

the standard. 

2) Discontinue the Pendleton PM 10 FRM (41-059-0121). This site has not had an annual 

second high value above 37% of the NAAQS in the last 10 years. EPA approves this change. 

3) Discontinue the Medford Welch and Jackson PM 10 FRM (41-029-2129). This site has not 

had an annual second high value above 62% of the NAAQS in the last 10 years. This monitor is 

one of three in the Medford PM10 AQMA. The White City PM10 sampler (41-029-4001) will 

remain operating indefinitely, and the Medford Grant and Belmont PM 10 sampler (41-029-0133) 

will operate as long as air toxies are collected in Medford. EPA approves this change. 

4) Discontinue the Klamath Falls PM10 FRM (41-035-0004). This site has not had a second 

high value above 62% of the NAAQS in the last 10 years. If this monitor is the only remaining 

PM 10 monitor in the Klamath Falls PM10 maintenance area, it cannot be discontinued unless 

ODEQ proposes, and EPA agrees, to a revision to the State implementation plan (SIP) that 

identifies a surrogate method of determining compliance with the standard. 

PM2.5 monitors 

5) Discontinue the La Grande (41-061-0119) PM2.5 FRM. The three year average 98th 

percentile for this site is 18uglm3. La Grande will continue to collect light scattering 

(continuous PM2.5) data. EPA approves this change. 

6) Discontinue the Medford Dodge Road (41-029-1001) PM2.5 FRM Background site. 

EPA approves this change. 

7) Discontinue the Portland N. Roselawn (41-051-0246) PM2.5 FRM. The PNR three 

year average 98th percentile is 20ug/m3. Funding will be shifted to fund an FRM in Sweet 

Home which was defunded by the Oregon Dept of Agriculture. The Portland site will 

continue to collect light scattering (continuous PM2.5) data. EPA approves these changes. 
8) Start a PM2.5 FRM at Sweet Home (41-43-2002) on a 1/6 schedule. FRM sampling 

will start here because the site had an estimated three year average 98th percentile of 

32uglm3, based on light scattering. EPA approves this change. 

9) Hillsboro (41-067-0004) PM2.5 FRM will change its schedule from 1/6 to 1/3 because 

its current 98th percentile is within 5 to 10% of the NAAQS. EPA approves this change. 

10) ODEQ will start up a light scattering (continuous PM2.5 estimate) and meteorology 

site in Silverton, Oregon which will be funded during the summer months by the Oregon 

Department of Agriculture and during the winter by DEQ. The site will monitor field burning 

in the area just northwest of Salem starting July, 2010. This is not EPA funded, no approval 

needed. 

11) ODEQ may discontinue light scattering (continuous PM2.5) monitoring at the 

Klamath Falls Background site to transfer funding to other monitoring work. EPA approves 

this change. 

CO monitors 

12) ODEQ proposes to discontinue the Portland, SW 3rd CO site (41-051-0087). This 

site is 21 % of the NAAQS. There is a trace CO monitor at the Portland NCore site, which is 

within the Portland CO maintenance area. EPA approves this change. 

13) Discontinue the Medford Rogue Valley Mall CO site (41-039-0018). This site is 

25% of the NAAQS. If this monitor is the only remaining CO monitor in the Medford CO 

maintenance area, it cannot be discontinued unless ODEQ proposes, and EPA agrees, to a 

revision to the State implementation plan (SIP) that identifies a surrogate method of 

determining compliance with the standard. 

Lead monitors 

14) ODEQ will delay PMlO-Pb monitoring at the Portland NCore site until 12 months 

after EPA finalizes the revised Pb Rule, which is projected to be December 2011. 

NOy monitors 

15) ODEQ will start operating an NOy monitor at Portland SE Lafayette (41-051-0080) 

by January 1, 2011, as required by EPA. EPA approves this change. 

Air Toxies monitors 

16) ODEQ will move the Salem air toxics site on July 1st to Hillsboro, N. Portland, 

Gresham, Albany, McMinnville, or St. Helens depending on the outcome of the 2005 NAT A 

results, yet to be reviewed by ODEQ. EPA approves this change. 

PMc monitor 

17) ODEQ will begin reporting PMc data from the Portland NCore site to AQS by 

January 1, 2011. EPA approves this change. 

The following monitors are designated "core" monitors because they are either: 1) 

required by 40 CFR Part 58, Appendix D, 2) have a design value near or above the new 

PM2.5 24-hour standard of 35ug/m3, or 3) they are essential monitoring parameters at NCore 

sites: 

1. 	 PM2.5 FRMs (or Approved Regional Method): 

a) PortlandiSE Lafayette 

b) PortlandIN Roselawn 

c) Medford (primary and co-located) 

d) Eugene (primary and co-located) 

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e) 	 La Grande NATTS site 

f) 	 Klamath Falls 

g) 	 Oakridge 

h) 	 Lakeview 

i) 	 Pendleton 

2. 	 PM2.5 speciation monitors: 

a) PortlandlSE Lafayette 

b ) Eugene/Amazon Park 

c) MedfordlGrant & Belmont 

d) Klamath Fall 

3. 	 Pre-cursor gas monitors at the PortlandlSE Lafayette NCore site 

"Core" monitors are those monitors in the network that must be operated with 

available PM2.5 monitoring funds. The "non-core" PM2.5 monitors in the State's network 

can be operated at ODEQ's discretion with any remaining federal funds or State funds. If 

you have any questions about our approval of the Oregon monitoring network, please contact 

Keith Rose at (206) 553-1949. 

Sincerely, 

State 

De~tin71~ and Tribal Program Unit 

cc: 	 Paul Kaprowski, 000 

Keith Rose, OAWT 

Chris Hall, OEA 

Jeff Smith, ODEQ 

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