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EPA File No. C0500-03745, San Juan County, Colorado <br /> 2°a Quarter 1999 Report (April —June) <br /> Page 2 <br /> American Tunnel Bulkhead <br /> The American Tunnel bulkhead was inspected, gage pressure readings taken, and fluid <br /> samples analyzed for pH, conductivity, and temperature more frequently than the <br /> requirements of Items 3. This information is attached. <br /> Site inspections have not revealed any indication that the bulkhead is performing other <br /> than as 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. This water had a pH of 6.85, temperature of 14' C and <br /> conductivity of 150 umho. The total quantity injected during the 2° quarter was 0.07 <br /> Mgallons. <br /> Please contact me if you have any questions on this report. <br /> Sincerely, <br /> Larry Permo <br /> Reclamation Manager <br /> cc: Sarah Johnson, CDPHE <br /> Wally Erickson, DMG <br /> i Xllen Sorenson, DMG <br /> LP/lf <br />