2020-10-27_PERMIT FILE - C1981035 ‎(22)‎

• Permit No: C1981035
• IBM Index Class Name: Permit File
• Doc Date: 10/27/2020
• Section_Exhibit Name: KII Appendix 16 Dunn Ranch LBA Technical Resources Report
• Media Type: D
• Archive: No

2nd highest daily average PM,,concentration Sth highest daily average PM2.concentration
2025 High Oil and Gas Scenario 2025 High Oil and Gas Scenario
(R)Mining from BLM Planning Areas (R)Mining from BLM Planning Areas
- I
- 1 52 _ 5.2
- -- 44 _ (r - r' - - - _ 4A
40 Q 4
36
- �I 28 -_-- -- _. 2.8
24 2A
I � y
I i
r - - _ --�- 20 - - - 2
_ 1 - 16 _. - �. - 16
-'. - —11 12 - - I _ 1.2
0.8
4
D
Li
lAglrn' lA9lms
median= 0.0 µglm' O max(87,198)= 52.5/zg/m' median= 0.0 µglm' O max(91,i61)= 5.4 Frglm3
min(163,1)= 0.0"fm O min(184,1)= 0.01ugim
Sth highest 1 hour daily max N%concentration 4th High 8 Hour Avg Daily Max Ozone
2025 High Oil and Gas Scenario 2025 High Oil and Gas Scenario
(R)Mining from BLM Planning Areas (R)Mining from BLM Planning Areas
40
� -- „ 2.4
. --- 37.5
_ 35
32.5 - � 2.2
r
30 2
27.5 .-._ f 1.8
25
1.6
220 I
25
17.5 1.2
,
- - -- - 15 , ° 1
- �.. �.�.�e, �� 0.8
12.5
°
-'
2.5 � 11 f 02
ppb prA,
median= 0.0 ppb O max(87,198)= 40.5 ppb median= 0.0 ppb O max(94,199)= 2-7 ppb
O min(214,16)= 0.0 ppb p min(3,160)= 0.0 ppb
Figure 2.2-2 Contribution to the 2025 High Oil and Gas Scenario(R) Mining from BLM Planning Areas
(Environ 2017)
The CARMMS data suggests that the overall air quality impact surrounding the mine is essentially
negligible when compared to other potential sources in the state of Colorado.
For the TRFO,we are disclosing the high CARMMS scenario(Figure 2.2-3)to account for all the reasonably
foreseeable future actions that could occur within the area(mostly oil and gas development),while noting
that the area is currently tracking far below the low scenario.
Dunn Ranch Area LBA and Mining Plan Modification 31
Technical Resources Report