2008-02-22_APPLICATION CORRESPONDENCE - C2008086 ‎(40)‎

• Permit No: C2008086
• IBM Index Class Name: Application Correspondence
• Doc Date: 2/22/2008
• Doc Name: PDEIS Appendix G Air Quality Analysis Modeling Report
• Media Type: D
• Archive: No

Appendix G
Air Quality Analysis Modeling Report
Table 4-3
AREA AND VOLUME SOURCE PARAMETER DETAIL,
FAR-FIELD ANALYSIS (CALPUFF-CITE)
Lower Left Lower Left Source
Release
Parameter ~ Corner Corner Base
Height Sigma - Sigma - z Area
Area Source 1 Easting Northing Elevation gym) y (m) (m) (m2)
(m) (m) (m)
Volwne Source 1 multiple multiple multiple 2 4.65 2.32 N/A
(Transmission Line )
Vohune Source 2 multiple multiple multiple 2 4.65 2.32 N/A
(Railroad)
Vohune Source 3 multiple multiple multiple 2 4.65 2.32 N/A
Haul Roads
Area Source 173014 4362500 1655
93 2 N/A 0
0 7366136
15
Mine Area -Construction . . .
Area Source 173014 4362500 1655
93 5 N/A 4
65 7366136
15
Mine Area -Production . . .
Projected Coordinate System = UTM NAD 83 Zone 13 North
An effective release height of 5 meters was chosen for the Mine Area source, to account for the
vertical distance above the ground for emission sources associated with production (tall
stockpiles, large haul equipment and elevated processing equipment). An initial vertical
dimension of 4.65 meters was applied in CALPUFF-Cite.
4.4.1 Emission Rates
As discussed in Section 3.4.1, total emissions for each activity were estimated based on detailed
construction and equipment information, utilizing emission factors and calculation
methodologies recommended by the USEPA to the extent possible. However, for the far-field
analysis, the full amount of estimated project emissions shown in Table 3-3 were modeled for all
emission sources, since none of the emission sources were geographically "bounded" in the
far-field analysis.
Table 4-4 provides a summary of emission rates modeled in the far-field analysis, grouped
according to the specific volume or area source and expressed as both the long-term (tpy) and
short-term emission rates (g/s). For each volume or area source, total emissions are distributed
equally throughout the associated volume sources or across the associated area. As discussed
earlier, total emissions for any volume or area source may include emissions from any of the
various sources or activities associated with construction and/or production. Detailed emission
summaries are presented in Attachment B to this Report.
As discussed in Section 3, mitigation measures and emission controls such as chemical
suppression, watering, and enclosed conveyances will be implemented to reduce particulate
matter/fugitive dust emissions during construction and ongoing production activities.
G-22
DBMS 534