REV01171

• Permit No: C1981026
• IBM Index Class Name: Revision
• Doc Date: 8/4/1998
• Doc Name: REQUEST FOR PHASE III BOND RELEASE AT SLURCO CORP CANADIAN STRIP MINE
• Type & Sequence: SL5
• Media Type: D
• Archive: No

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AOPenAL[ A - 1998 & 1997 VeRetolion Snmp[inR Da(a
' Production-1997
Production values in the two reclaimed areas exceeded the reference area value, therefore,
' hypothesis testing was not required (Table A-6). Sample adequacy was determined in the field
by lumping the production values of reclaimed Phase areas I, II, and III. A separate production
' acreage-weighted calculation has been performed for Phase areas I, II and III (calculations
following Table A-6). All production data for 1997 are presented in Tables A-18 and A-19.

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Table A-6
Summary of Production Sampling
Canadian Strip Mine -'1997 One Square Meter Quadrants
Computed
Mean Dry Standard Actual Adequate
Area Wei ht ( rams) Deviation. Sam le Size. :.:Sam le Size
Phase I Reclaimed Area 61.50 23.00 6 30.47
Phase II Reclaimed Area 88.00 21.70 8 12.17
Phase III Reclaimed Area 92.63 21.21 8 10.50
Phase I, II, & III Reclaimed
Area (Lumped values) 82.45 24.69 22 15.69
Phase IV Reclaimed Area 93.28 26.41 25 13.92
Reference Area 42.73 5.78 15 3.20
Acreage-Weighted Bond Release Block Statistics
for Production; Phase I, II, and III Reclaimed Areas
(1.) Weighted sample mean (x) _[(9.3/24.1)(61.50).+ (6.3/24.1)(88.00) +
(8.5/24.1)(92.63)] = 79.40 grams/•1 m'.
1997 Production Conversion Calculations
Phase I, II, & III, Phase IV Reclaimed Areas, and Big Sagebrush Reference Area
(1.) Phase I, II,& III weighted sample mean (x) = 79.40 grams/1 mZ
The sample mean for production is converted to pounds per acre: 79.40 - 8.90309 =
7_ Oo6.91 pounds per acre.
(2.) Phase IV sample mean (x) = 93.28 grams/1 mZ
A-15