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RCRA Permit - For Landfill May 1991 <br /> EPA I.D. CAD 990 794 133 Modification 0 <br /> parisons procedure is used, the Type 1 <br /> experiment-wise error rate for each testing <br /> period shall be no less than 0.05; however, <br /> the Type 1 error of no less than 0.01 for <br /> individual well comparisons must be main- <br /> tained. <br /> (iii) The statistical method shall account for data <br /> below the limit of detection with one or more <br /> statistical procedures that are protective <br /> of human health and the environment. Any <br /> practical quantification limit (pql) approved <br /> by the Director under 40 CFR 264.97 (h) that <br /> is used in the statistical method shall be <br /> the lowest concentration level that can be <br /> reliably achieved within specified limits of <br /> precision and accuracy during routine <br /> laboratory operating conditions that are <br /> available to the facility. <br /> (iv) If necessary, the statistical method shall <br /> include procedures to control or correct for <br /> seasonal and spatial variability as well as <br /> • temporal correlation in the data. <br /> 6. MONITORING PROGRAM AND DATA EVA ATION <br /> (a) The Owner/Operator shall collect, preserve, and <br /> analyze samples pursuant to Permit Condition <br /> III.3.- <br /> (b) The Owner/Operator shall determine ground water <br /> quality at each well at the compliance point ac- <br /> cording to the schedule described in the "Post- <br /> Closure Plan" during the life of the regulated <br /> - unit, including the closure and post-closure care <br /> - <br /> period. [40 CFR 264.98(d) ] The Owner/Operator <br /> shall express the ground water quality at each <br /> monitoring well in a form necessary for the deter- <br /> mination of statistically significant increases <br /> (i.e. , means and variances) . [40 CFR 264.97 (h) ] <br /> (c) The Owner/Operator shall determine the ground <br /> water flow rate and direction in the uppermost <br /> aquifer at least annually. [40 CFR 264.98 (e) ) <br /> (d) The Owner/Operator shall determine whether there <br /> is a statistically significant increase over the <br /> background values for each parameter identified <br /> in Permit Condition III.2 (a) each time ground <br /> water quality is determined at the compliance <br /> point. In determining whether such an increase <br /> has occurred, the Owner/Operator must compare the <br /> 20 <br />