2008-03-03_PERMIT FILE - C2006085 ‎(14)‎

• Permit No: C2006085
• IBM Index Class Name: Permit File
• Doc Date: 3/3/2008
• Doc Name: Baseline Vegetation Data by Kent Crofts of IME
• Section_Exhibit Name: Exhibit J
• Media Type: D
• Archive: No

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Table 2,
Northfield Mine
Sample Adequacy Calculations

Site # Samples
Collected Mean Standard
Deviation Nm
90/10
Juniper -Grassland Predisturbance Area
Total Plant Cover (%) 15 43.80 9.66 8.8
Total Herbaceous Production (g per 1/4m2) 50 26.87 11.50 32.1
Shrub Density (# per 100m2) 45 7.02 5.11 40.0

Disturbed Predisturbance Area
Total Plant Cover (%) 15 39.87 10.43 12.4
Total Herbaceous Production (g per 1/4m2) 50 23.05 15.01 61.9
Shrub Density (# per 100m2) 50 6.02 5.79 70.0

Juniper -Grassland Reference Area
Total Plant Cover (%) 15 43.73 5.80 3.2
Total Herbaceous Production (g per 1/4m2) 30 26.32 9.35 21.7
Shrub Density (# per 100m2) 50 6.86 5.11 41.9

Disturbed Reference Area
Total Plant Cover (%) 15 41.20 11.74 14.6
Total Herbaceous Production (g per 1/4m2) 50 23.26 12.23 47.0
Shrub Density (# per 100m2) 50 7.40 7.09 69.2
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