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Revised 1/4/80 <br />Section 816.116 (a) Continued. <br />• _ <br />/~ _ ~l YZ <br />x Yl <br />Where: h = the value which much be equalled or to within a minimum <br />x of 90% of this value before it can be demonstrated that <br />the land has been reclaimed. This proportional equation <br />compensates for the variations between sampling years; <br />X1 = percent cover or productivity from premine affected <br />area; <br />Y1 = percent cover or productivity from premine reference <br />areas; <br />YZ = percent cover or productivity from postmine reference <br />areas; <br />If xZ (cover or productivity on reclaimed land) does not equal x , <br />then the following inequality must be met: <br />n <br />• 0 < xZ - x + Z 8 Sh2 + S~ 2 <br />]: <br />Where: x2 = cover or productivity on reclaimed area. <br />n = reclamation standard. <br />x <br />Z 8 = Z statistic for 80% confidence = 0.84. <br />S_ Z = variance of az <br />xZ <br />S~ Z = estimated variance of n calculated as: <br />X X <br />2 <br />S;, _ al S? + YZ SZ + SZ $Z <br />x 12 y2 2 r }Z r <br />1 <br />. _ 2 <br />Where: SZ ~ al S? S? <br />`. r _ Z xl + Y1 <br />yl 2 2 <br />xl yl <br />816-157 (;i ) <br />