Record Display for the EPA National Library CatalogRECORD NUMBER: 5 OF 6
|Main Title||Superfund record of decision : Central City/Clear Creek, CO.|
|CORP Author||United States. Environmental Protection Agency.|
|Publisher||U.S. Environmental Protection Agency, Office of Emergency and Remedial Response ; National Technical Information Service,|
|Subjects||Hazardous waste sites--Colorado--Clear Creek County ; Hazardous waste sites--Colorado--Gilpin County|
|Additional Subjects||Hazardous materials ; Mines(Excavations) ; Industrial waste treatment ; Metals ; Recommendations ; Sites ; Maps ; Ground water ; Surface waters ; Sediments ; Fluorides ; Water pollution control ; Acid mine drainage ; Toxic substances ; Water pollution effects(Humans) ; Water pollution effects(Animals) ; Aquatic organisms ; Clear Creek County(Colorado) ; Superfund program ; Environmental research ; Remedial actions ; Gilpin County(Colorado) ; Central City(Colorado) ; Environmental monitoring|
|Collation||159 pages : illustrations ; 28 cm|
The focus is on five abandoned mines/tunnels proximal to the cities of Idaho Springs, Black Hawk and Central City and the influence of acid mine drainage from those tunnels on adjacent stream courses. Surface water contamination results from acid mine drainage emanating from the five tunnels and from seepage of ground water through tailings piles both proximal to these tunnels and along stream courses. Approximately 1,200 lbs per day of dissolved and suspended metals are discharged to the Clear Creek drainage from the five mine tunnels. These dissolved and suspended metal loadings have resulted in a significant depletion of aquatic life and have potential impact to sediments and downstream users of surface and ground water. There are ten contaminants of concern including aluminum, arsenic, cadmium, chromium, copper, fluoride, lead, manganese, nickel, silver and zinc. Interim remedies are described.
Cover title: Superfund record of decision (EPA Region 8)--Central City/Clear Creek, Colorado (first remedial action), September 1987. "EPA/ROD-R08-87-016." PB88-220983. Final ROD report.