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9 <br />,: ~ Thomas A. Schreiner <br />October 22, 1986 <br />page 2 <br />South Subdrain <br />Date 4/29 <br />Flow (gpm) 1.6 <br />pH 7.2 <br />Conductivity 3400 @ 10°C <br />Date 7/31 <br />Flow (gpm) 0.5 <br />pH 7.5 <br />Conductivity 3410 @ 16°C <br />Bench Piezometers <br />6/04 <br />1.1 <br />3240 @ 12°C <br />9/04 <br />0.6 <br />7.4 <br />3480 @ 12°C <br />7/02 <br />0.5 <br />7.2 <br />2670 @ 10°C <br />10/3 <br />0.8 <br />2900 @ 10°C <br />Date 4/29 5/20 7/02 <br />P-1 21.7' 21.5' 22.6' <br />P-2 none none none <br />P-3 46.3' 46.7' 46.8' <br />P-4 23.6' 24.5' 25.5' <br />Date 7/31 9/04 10/3 <br />P-1 21.7' 21.6' 16.2' <br />P-2 none none none <br />P-3 47.4' 47.5' 47.7' <br />P-4 26.6' 26.1' 25.9' <br />The north underdrain was dug out in July and a 4" PVC pipe was installed <br />to discharge from the underdrain. <br />Enclosed are copies of the lab reports of full list analysis done for the <br />subdrains in April and July, 1986. <br />If there are any questions concerning these results, let me know. <br />Sincerely, <br />Larr,,y M. Reschke, P.E. <br />Mine Engineer <br />LMR/clt <br />enclosure <br />cc: Jim Stover <br />