PERMFILE61416

• Permit No: C1984065
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: App. 3.6-5
• Section_Exhibit Name: Appendix 3.6-5 Phase II Bond Release -Revegetation Success Sampling
• Media Type: D
• Archive: No

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directives in Colorado's guidelines (1988 and 1995). When fhe inequality (n,Mn s n) is true, sampling can
be considered to be adequate, and nmin is determined as follows:

Where: n =the number of actual samples collected with a minimum of 15 in each unit;
t =the value from the t distribution for 90% confidence with n-1 degrees of freedom;
s 2 ° the variance of the estimate as calculated from the initial samples;
x =the mean of the estimate as calculated from the inkial samples.
•
u
It the initial minimum number of samples in each area did not provide a suitable estimate of the
mean (i.e., the inequality was false), additional samples would have been collected until the inequality
(nmm s n) became true.
o~vm C$~ 4ppR0, INC. Page 9 NCIG -Cwt RWye M - Phass II Bond RNeaM Evaluetlon