1. 3SAQS Network Assessment Till Stoeckenius, ENVIRON Three-State Air Quality Working Group Conference Call 17 January 2014

2. Today’s Agenda Review discussion from 1/10 call Provide summary of information received since the 1/10 call Gather additional information, comments and suggestions Discuss potential recommendations Get ready for 24 January call 2

3. Highlights from Last Call Site classification method – Step 1: List of “permanent” and “non- permanent” sites – Step 2: Non-Permanent Class A vs Class B sites Review Class B sites and potentially underserved areas (UAs) 3 NoNo YesYes YesYes NoNo Permanent Sites Retain (Class A Site) Potential 3SAQS Sites Monitoring Site Classification Step 1: Permane nt Site? Step 2 : High value location? Non- Permanent Sites Consider Moving (Class B Site) Monitoring Network Objectives Starting Network

4. Input Received Past Week (see new map, revised site spreadsheet and revised UA table) USFS (J. Korfmacher and D. Miller) – Changes to “permanent” vs. “non-permanent” site list – Comments on Class A vs. Class B non-permanent sites – Comments on UAs UDAQ (P. Barickman) – Comments on Class A vs. Class B non-permanent sites – Comments on UAs WY DEQ (C. Keslar) – Potential funding problems for Hiawatha and Campbell Co. sites; move to “non-permanent” – A temporary monitor is currently located in East-Central WY (UA2) for 2013 - 2014 – Comments on UAs CDPHE (G. Pierce) – Move Pawnee Buttes to “non-permanent” – Palisade and Aspen considered “permanent” – Lay Peak to stay put through 2014; possible move in 2015? – Walden will operate through at least 2014 – Recommended high priority UAs (in order): a. UA5 East of Dinosaur NM b. UA13 Roan Plateau c. UA12 Kremmling as this area had some issues with air quality when the LP waferboard plant was in operation. It is unknown what impact the current pellet facility might have, but the area is subject to deep inversions. d. UA9 Dove Creek 4

5. Updated 16 January “Permanent” Sites 5 RifleDinosaurCasper GothicVernalBoulder ShamrockRedwashDaniel IgnacioOurayPinedale BondadRabbit MountainBig Piney Rocky MountainWhiterocksJuel Spring CortezHurricanePinedale-CASTNET Mesa VerdeZion MeekerCentennialWamsutter RangelyBasinMoxa PalisadeThunder BasinGrand Teton RooseveltYellowstone MytonDevil's TowerNewcastle SheridanSouth PassPawnee Buttes CanyonlandsN. CheyenneHorsepool Aspen

6. Updated 15 January “Non-Permanent” Sites 6 Trout Creek PassBriggsdale Goliath PeakPrice [Official 3SAQS site] FlattopsFruitland [Official 3SAQS site] Ripple CreekLittle Mountain Sunlight MountainSinclair Casper McClure Pass Walden [Official 3SAQS site]Wyoming Range Dutch John Grand MesaEscalante [Official 3SAQS site] Silt-CollbranMurphy Ridge Colorado NMSouth Campbell Co. Lay Peak [Official 3SAQS site]Hiawatha Green Kenosha Pass Norwood

7. Updated 16 January “Non-Permanent” Sites: Recommended Classifications (draft) 7 Class A: Keep in Current LocationNot Sure Class B: Would be willing to move if appropriate BriggsdaleEscalante [Official 3SAQS site]Trout Creek Pass Goliath Peak Colorado NMWalden [Official 3SAQS site]: (not before Oct. 2014) Flattops Sinclair Casper Dutch John Ripple CreekMurphy RidgeGrand Mesa Sunlight MountainSouth Campbell Co.Silt-Collbran McClure PassHiawatha Green Lay Peak [Official 3SAQS site] (not before 2015) Price [Official 3SAQS site]Norwood Fruitland [Official 3SAQS site] Little Mountain Kenosha Pass

8. 8 “Permanent” Site “Non- Permanent” Site Industry Site Old Great Sand Dunes O3 Monitor (1988-1991) USFS Holy Cross (potential replacement for Wilson) New Snowbird O3 Monitor Wyoming Range (Closed) New Deadman Pass Site New Storm Peak (DRI) 17 January Update Site Type

9. 9 Existing “Potential 3SAQS” Ozone Monitoring Sites

10. Evaluation of Potentially Underserved Areas See updated table in: UA_ProsCons_17Jan2014.docx Need to rank UAs (H, M, L or 1,2,3…13) 10

11. Reminder: 3SAQS Monitoring Network Objectives Provide adequate spatial coverage of study area Monitor locations with O 3 close to or above NAAQS Monitor locations downwind of existing or planned future development areas Monitor Class I and sensitive Class II AQRV impacts Characterize background O 3 Provide data for model performance evaluation (O 3, PM and precursors) 11

12. AreaInformal Summary AssessmentRecommended Rank [DRAFT] UA13: Roan PlateauDownwind of O&G developments and far from Rangely; USFS suggests Douglas Pass site 3 UA5: Dinosaur East SideOf interest for several reasons and commentators have suggested high priority but USFS may have difficulty servicing this remote location 3 UA12: Kremmling AreaMostly high elevation; downwind of White River O&G development; low elevation areas not well represented by current network; potential USFS Holy Cross site in southern end and DRI Storm Peak in northern end 2-3 UA2: East-Central WYConsidered high priority by WY DEQ due to future development plans; considered low priority by other agencies; mobile monitor in place 2013 - 2014 3 (based on WY DEQ analysis) UA3: Medicine Bow – Saratoga Potentially downwind of large O&G development but WestJump predicts low anthropogenic impact; may be manageable by USFS 2 UA9: Dove Creek North SideMay be reasonably well represented by existing sites but there is potential for future development in the area (Mancos and Paradox) 2 UA4: Central West WYSome on-going development to the south but otherwise of lower interest; considered medium priority by WY DEQ 1-2 UA6(Caineville-Hanksville), UA7(Green River-Westwater), UA8(Blanding Area) Long way from any existing assets; UDAQ suggests existing sites are reasonably representative of UA6, UA7 and UA8 1 UA10(Delta-Montrose), UA11(Black Canyon of the Gunnison) Minimal evidence of ozone greater than background; Near otherwise unmonitored Class I areas (Black Canyon of the Gunnison and West Elk); Easy access via US-50 1 UA1: Saguache-Monte Vista- Alamosa Low priority based on ENVIRON analysis and other comments received;1 12

13. Next Steps – Jan. 10 th through mid-Feb. 13 StepDeadline Obtain additional input : Assessment WG review of site status / rankingsTODAY!! ENVIRON provides revised network map and first draft of recommendations By 23 January Call for Assessment WG to reach consensus on draft recommendations Target of 24 January at 2:00 PM MST Additional calls as needed for Assessment WG to reach consensus Possible calls on 28 and/or 29 January, or morning of 31 January Complete recommendations memo for distribution to Steering Committee before or on 6 February Review of recommendations memo by Steering Committee, including input on site operations commitments by each funding agency by 14 February Finalize memo including data files, map layers, data sources and processing procedures 21 February