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The sample interval shall be < forty-five (45) days (in the event of extreme winter <br /> conditions at A-72, the 45 day maximum may be extended); <br /> The post-project monitoring period will be at least two 2 <br /> ( ) years. <br /> (b) Computation and graphing of the index numbers (as described in Section A-3 above) will <br /> continue through the post-project period. <br /> (c) when the conditions of A-4(a) have been met and SGC is satisfied that the closure <br /> activities have met the permit release criteria of paragraph 14 of the Consent Decree. <br /> SGC may present an analysis of the post-project period, as follows: <br /> For each flow class in the post-project <br /> nod, SGC will compile values of dissolved zinc and compute the mean and standard devi the <br /> nerved <br /> values. f those <br /> For each flow class, the average dissolved zinc concentration of the <br /> Post- <br /> pen od will be compared to the average dissolved zinc concentration o f theroject <br /> equivalent flow class in the reference water-quality set using a one-sided t-test for <br /> the difference of two means at the 0.05 significance level using the procedure of <br /> paragraph 3-3.2.1 of National Bureau of Standards Handbook 91, Experimental <br /> Statistics (1966, p. 3-34); see Attachment 2. <br /> (d) If the conditions of paragraph of the Consent Agreement have been met and the <br /> statistical tests of Section A-4(c)show that there has not been a statistically discernible <br /> increase in dissolved Zn concentrations at the reference point, SGC will be entitled to <br /> permit release under the terms of paragraph of the Consent Agreement. <br /> 32512-1.-"»a <br /> 5_a <br />