Information from GAO Superfund Survey 1999

[California] IRON MOUNTAIN MINE (CAD980498612)

Site ID: CAD980498612
Site name and region Location, county, and size of site Date EPA added site to National Priorities List (NPL) When added to NPL, buildings present at site When added to NPL, site also had Primary contaminants at site Causes of contamination Public health advisory issued Primary financial responsibility for site
Iron Mountain mine Region=9 Off Highway 299, 9 miles northwest of, Redding CA 96001 / Shasta / 4,400 acres Sept. 1983 abandoned commercial, public, or industrial buildings debris piles; mining waste; ponds/lakes; rivers/creeks/streams; wetlands/estuaries acids, metals mining/smelting Yes Private party


Cleanup actions taken at site prior to the formal cleanup actions
performed either by EPA or party determined to be responsible
for cleanup:
EPA's site ID=CAD980498612
Access to site was restricted People were relocated Alternative water supply was provided Media removed and treated On-site treatment (biological, physical, chemical, or thermal) Removal of barrels, drums, tanks, or other containers
Yes       1,420,000,000 gallons of groundwater  


EPA's site ID=CAD980498612
Start date(s) for any planned or in-progress studies to determine best cleanup methods Projected signing date(s) for any unsigned record(s) of decision (ROD) specifying cleanup actions to be performed
Sept. 1996 2nd quarter, FY 2002


EPA's site ID=CAD980498612
Date(s) of signed ROD(s) specifying cleanup actions to be performed Date of most recent amendment, if ROD has been amended Explanation for ROD specifying "No action" or "No further action"
Oct. 1986 No amendment Not applicable
Sept. 1992 No amendment Not applicable
Sept. 1993 No amendment Not applicable
Sept. 1997 No amendment Not applicable


EPA's site ID=CAD980498612
Start date(s) for design of cleanup methods Completion date(s) for design of cleanup methods Party responsible for cleanup
Jan. 1993 3rd quarter, FY 1999 Private
Sept. 1994 3rd quarter, FY 1999 Private
Jan. 1998 2nd quarter, FY 2000 Private
1st quarter, FY 2003 1st quarter, FY 2004 Private
1st quarter, FY 2003 1st quarter, FY 2004 Private
Mar. 1987 May 1988 EPA
Sept. 1987 May 1990 EPA
Sept. 1987 June 1989 EPA
Sept. 1987 Mar. 1990 EPA
Sept. 1992 4th quarter, FY 1999 EPA
Sept. 1993 May 1996 EPA


EPA's site ID=CAD980498612
Cleanup action(s) performed at site and party conducting action(s) Type of action taken Contaminated media addressed Start date(s) for action(s) Completion date(s) for action(s) Volumes addressed Volumes remaining
Long-term/EPA Cap (Placing an impermeable cover over contaminants) Groundwater June 1988 Sept. 1989    
Long-term/Private Neutralization (Reducing the acids or alkalines in contaminants) Liquid Waste Aug. 1993 4th quarter, FY 1999 180,000,000 gallons (estimated) of liquids already addressed unknown amount of gallons (estimated) of liquids remaining to be addressed
Long-term/Private Neutralization (Reducing the acids or alkalines in contaminants) Liquid Waste Sept. 1994 4th quarter, FY 1999 250,000,000 gallons (estimated) of liquids already addressed unknown amount of gallons (estimated) of liquids remaining to be addressed
Long-term/EPA Neutralization (Reducing the acids or alkalines in contaminants) Liquid Waste Aug. 1994 Jan. 1997 400,000,000 gallons (estimated) of liquids already addressed unknown amount of gallons (estimated) of liquids remaining to be addressed
Short-term/Private Neutralization (Reducing the acids or alkalines in contaminants) Liquid Waste Sept. 1989 Sept. 1994 55,000,000 gallons (estimated) of liquids already addressed unknown amount of gallons (estimated) of liquids remaining to be addressed
Short-term/EPA Neutralization (Reducing the acids or alkalines in contaminants) Liquid Waste Sept. 1988 Mar. 1989 4,500,000 gallons (estimated) of liquids already addressed  
Short-term/EPA Other Other Aug. 1997 Dec. 1997    
Long-term/Private Dewatering (Removing water from materials to better handle them) Surface Water Mar. 1990 Jan. 1991    
Long-term/Private Neutralization (Reducing the acids or alkalines in contaminants) Surface Water Aug. 1998 4th quarter, FY 2000 unknown amount of gallons (estimated) of liquids already addressed unknown amount of gallons (estimated) of liquids remaining to be addressed
Long-term/EPA Dewatering (Removing water from materials to better handle them) Surface Water Mar. 1989 Jan. 1990