2007-07-30_PERMIT FILE - C1981008A ‎(28)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 7/30/2007
• Doc Name: OSM Blast Vibration Regression Analysis at 95 Percent Confidence Level
• Section_Exhibit Name: Section 2.05.3‎(6)‎‎(a)‎ Attachment 2.05.3‎(6)‎‎(a)‎-2
• Media Type: D
• Archive: Yes

. The 95Y confidence level equation is: PV= 67.87*(DS)"-1.22
The coefficient of determination (r"2 - `goodness of fit') is: 0.69
.~~ )
.~~=greasion Analysis is complehe': refer to above information, and to printed
Distance va. Charge~weight~tables for all future blast designs.
Modified Scaled Distances should be reviewed and renewed:
1. At least once a year.
2. Whenever geological or geographical site conditions change significantly.
3. Whenever blasting methods or blast design changes significantly.
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• (Revised July 2006) Attachment 2.05.3(6)(a)-2-2