WESTAR Oil & Gas ConferenceOctober 2008

Mark Smith

PM-10 and NOx are within NAAQS◦ NOx increment analysis completed

PM2.5 sometimes impacted by fire OZONE…….

Increment Consumed

Maximum PSD Allowance

Class II 11.5 25

Class I 0.14 2.5

Site 2005 2006 2007 2005-2007

Average

2008 YTD

value

Yellowstone

0.060 0.069 0.065 0.065 0.061

Boulder 0.079 0.072 0.067 0.072 0.101

Jonah 0.075 0.069 0.068 0.070 0.082

South Daniel

0.066 0.074 0.066 0.074

(red values indicate partial year data)

Standard = 75 ppb

6

25

35

45

55

65

75

85

95

105

115

125

Jan-05 Jan-06 Jan-07 Dec-07

Ozon

e (pp

b)

Monitored Monthly 8-Hour Maximum Ozone

Boulder maximum

Jonah maximum

Daniel maximum

Yellowstone maximum

Denver maximum

New (1-3 years) monitors in Atlantic Rim and Wamsutter◦ No issues yet (PM, ozone, NOx)

Monitor budgeted for Hiawatha area (planned new development)

Monitors in place include PM (2.5 and 10), NOx, and ozone

Upwind and downwind of CBM and coal mining activities

Wind-related PM-10 excursions occur◦ Usually covered by coal mine NEAP

PM2.5 well within standard NOx is staying within standard Ozone has been somewhat elevated

◦ Within NAAQS but we are watching

Facilities in Powder River Basin (PRB) increasing in number and moving west

Existing facilities are being modified for significant expansion◦ Minor source to major source◦ Major source to approaching PSD threshold◦ Expected that more sources will be major sources

of HAPs

Current production is primarily in the PRB (northeast portion of the state)

Future development in other areas of WY would have a significant impact especially in those areas are already concentrated with oil & gas facilities

Source: http://www.wsgs.uwyo.edu/coalbed/

As with CBM, oil shale deposits are located in areas already experiencing concentrated oil & gas development activities

Source: http://fossil.energy.gov/programs/reserves/publications/Pubs-NPR/40010-373.pdf