UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 10 1200 Sixth Avenue Seattle. WA 98101



### Reply to Attn Of: OAWT-l07
Mr. Bruce Louks, Air QualityMonitoring Coordinator Idaho Department ofEnvironmental Quality 1410 North Hilton Boise, ID 83706-1255
Re: 2007 Idaho AmbientAir MonitoringNetwork Assessment
Dear Mr. Louks:
We haveevaluated the 2007 Idaho Ambient Air MonitoringNetwork Assessment and IDEQ'sproposedmonitoringnetwork for 2008. This network assessmentproposes several changes to Idaho airmonitoring network since the 2006 network assessment. Theproposed changes to the network include the following:
1. DEQ proposes termination ofthe BoiseMountainView School PMIO Hi-vol (16-001­ 0011). Monitoring data from 2004 through 2006 shows athree-year 99th 

### percentile equal to 62 ug/m3 

### or41 % ofthe NAAQS. At the same time, the PMIO TEOM at 16 th 

### and Grove in Boise (16-001-0009) shows a three-year 99th

### percentile of60 uglm3 

### or40% ofthe NAAQS. Termination ofthis PMIO Hi-vol wouldprovide a cost savings while the PMIO TEOM will continue to demonstrate maintenance ofthe PMIO NAAQS. 2. DEQ proposed the addition ofcontinuous monitoring for trace levels ofcarbon monoxide, sulfurdioxide and for reactive oxides ofnitrogen (NOy) at the St. Luke's monitoring location inMeridian. The St. Luke's site has been approved as the Idaho NCore site, part ofa network ofnational multi-pollutant monitoring stations. The NCore network will add compounds ofinterestin additionto the criteriapollutants, particularly those compounds which contribute to the secondaryformation ofcriteriapollutants. These changes are consistent with the network design criteria identified in40 CFR Part 58, Appendix D. I therefore approve these changes. The following monitors are designated "core"monitors because they are either: 1) required by40 CFR Part 58, Appendix D, 2) have a design value near or above the new PM2.5 24-hour standard of35 uglm3, or 3) they are essential monitoringpar8.meters at NCore sites: 1. PM2.5 FRMs (or Approved Regional Method): a) Nampa (primary and co-located) b). MeridianiSt. Luke's Hospital



### _ _**cLj1i~h1lf~ t**  

### d) Salmon e) Franklin f) StMaries

### 2 2. PM2.5 speciationmonitors and pre-cursor gas monitors at the MeridianiSt. Luke's Hospital NCore site. "Core"monitors are those monitors in the networkthatmustbe operated with available PM2.5 monitoring funds. The ''non-core''PM2.5 monitors in the State's network· can beoperated at IDEQ's discretion with anyremaining federal orStatefunds. Ifyou have anyquestions about our approval ofthe Idaho monitoring network, please contact Keith Rose at (206) 553-1949.
Sincerely,

# J'i\gJJ~vJ**~** Mahbubul Islam, Manager State and Tribal Program Unit

cc: Doug Cole, 100 Chris Hall, OEA Keith Rose, OAWTUNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 10 1200 Sixth Avenue, Suite 900 Seattle, WA 98101-3140

OFFICE OF AIR, WASTE AND TOXles 

### NOV 

## 092009 Mr. Brad Broker Air Quality Monitoring Coordinator Idaho Department ofEnvironmental Quality 1410 North Hilton Boise, Idaho 83706-1255
Dear Mr. Broker:
We have evaluated the 2009 Idaho Ambient Air Monitoring Network Plan, which describes the Idaho monitoring network for 2009-2010. The following proposed changes to the monitoring network, which are consistent with 40 CPR Part 58.14, are approved. 1. St. Luke's (16-001-0010) meteorological tower will be moved approximately 30 feet adjacentto gas monitoring enclosure to support properNOy reactor height installation.
2. Lakes Middle School continuous PM2.5 TEOM (16-055-0006), with a design value of**26~g/m3** (2006-2008), has been decommissioned because ofconstruction activity at the school and permanent loss ofthe monitoring site. ODEQ will continue to monitor PM2.5 at the Lancaster PM2.5 TEOM site (16-055-0003), which ODEQ believes is representative ofthe Lakes Middle School site area. 3. The Boise Mountain View Elementary PM2.5 FRM site (16-001-0011), with a design value of**26~g/m3** (2006-2008), is a redundant monitor and therefore unnecessary for the Boise MSA. This monitor can be shut down. St. Luke's (16-001-0010) and NFS PM2.5 (16-027-0002) PRM monitors will continue to operate for comparison to the NAAQS.
4. The Boise Mountain View Elementary PM2.5 TEOM (16-001-0011) has a design value of**27~g/m3** (2006-2008) and is not needed for AQI forecasting and will be shut down. St. Luke's continuous PM2.5 TEOM (16-001-0010) and NFS continuous PM2.5 TEOM (16-027-0002) monitors will continue to operate for AQI forecasting. 5. A new continuous PM2.5 TEOM special purpose monitor (SPM) will be added to the network in Ketchum, Idaho (AIRS ID TBD),
6. Franklin PM2.5 continuous BAM1020 special purpose monitor will be added to the network and collocated with the Franklin PM2.5 PRM (16-041-0001).
7. Salmon PM2.5 (16-059-0004) continuous TEOM PM2.5 special purpose monitor will be replaced with a continuous BAM1020 PM2.5 FEM monitor. 8.

- St.l:uKe's PM2S(l6=00t=001 O)C@tihUbus TEOM-PM2's-spedalpurposemb1lifor wiJI be replaced with a continuous BAM1020 PM2.5 FEM monitor. 9. NFS PM2.5 (16-027-0002) continuous TEOM PM2.5 special purpose monitor will be replaced With a continuous BAM1020 PM2.5 FEM monitor.



# o PrlnttKJon R.cycltKJPaDS'10. Pinehurst PM2.5 (16-079-0017) continuous TEaM PM2.5 special purpose monitor will be replaced with a continuous BAM1020 PM2.5 FEM monitor.


### tt. St. Maries PM2.5 (16-009-0010) continuous TEaM PM2.5 special purpose monitor will be replaced with a continuous BAMI020 PM2.5 FEM monitor.
12. The Whitney ozone monitoring site (16-001-0030) was discontinued at the beginning ofthe 2009 monitoring season due to construction activity at the school. Ozone monitoring began at White Pine Elementary School (16-001-0017) on May 1, 2009 to satisfy the highest census tract population density ozone monitoring requirements. An ozone study conducted in the Treasure Valley in 2007 indicated that the White PineElementary school site is located in an area that would experience ozone concentrations equal to, or higher than, concentrations measured at the Whitney School site.
The following monitors are designated "core" monitors because they are either: 1) required by 40 CPR Part 58, Appendix D, 2) have a design value near orabove the new PM2.5 24-hour standard of35uglm3, or 3) they are essential monitoring parameters at Neore sites:
1. PM2.5 FRMs (or Approved Regional Method): a) Nampa (primary and co-located) b) MeridianlSt.**L~ke's** Hospital c) Pinehurst d) Salmon e) Franklin t) St Maries 2. PM2.5 speciation monitors and pre-cursor gas monitors at the MeridianlSt. Luke'sHospital 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 IDEQ's discretion with any remaining federal funds orState funds. Ifyou have any questions about our approval ofthe Idaho monitoring network, please contact Keith Rose at (206) 553­ 1949. Sincerely,

# ~~JL~ Mahbubul Islam, Manager State and Tribal Air Program Unit

cc: Mike McGown, 100 Keith Rose, OAWT Chris Hall, OEA

### O.Prlnl9CI.~!JecYC/fld.paper