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10 <br />9.5 <br />9 <br />8.5 <br />x 8 <br />CL <br />7.5 <br />7 <br />65 <br />6 <br />Dec-99 <br />Apr-01 Sel>M Jan-04 May-05 Oct-06 Feb-08 JW-09 <br />Date of Collection <br />Figure 1 - Calamity Draw pH <br />Calamity Draw pH <br />• .6 • ¦ ?h <br />• • ¦M ••• • • i •• <br />an 0 <br /> <br />• SWN108 <br />¦ SW N109 <br />The pH of the samples taken from Calamity draw show no overall change from <br />upstream of the mine to downstream of the NPDES discharge from Pond 007. The pH <br />in Calamity is roughly between 6.5 and 8.5 at both the upstream and downstream <br />locations both pre and post mine conditions.