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EPA File No. CO5000-03745, San Juan County, Colorado <br /> 3`d Quarter 2000 Report (July — September) <br /> Page 2 <br /> American Tunnel Bulkhead <br /> American Tunnel bulkhead was inspected, a gage pressure reading taken, and a fluid <br /> sample was analyzed for pH, conductivity, and temperature on October 10, 2000. This <br /> information is included with this report. The quarterly inspection was delayed because <br /> ventilation system repairs were required to provide safe access to the bulkhead for the <br /> inspection. <br /> The inspection did not reveal any indication that the bulkhead is performing other than as <br /> designed. <br /> Iniection Quantities <br /> In order to maintain a no discharge status from the Terry Tunnel settling ponds, water <br /> was pumped from the ponds through the Terry Tunnel bulkhead pipe into the mine pool. <br /> Alkaline material was not added. The total quantity injected during the 3`d quarter was <br /> 2 525 Mgal. The pH of the water entering the settling ponds and pumped back through <br /> the bulkhead ranged from 6.4-6.8. <br /> Please contact me if you have any questions on this report. <br /> Sincerely, <br /> Larry Perino <br /> Reclamation Manager <br /> cc: Sarah Johnson, CDPHE <br /> Wally Erickson, DMG <br /> Allen Sorenson, DMG <br />