The United States Environmental Protection Agency has added 10 sites to Superfund's National Priorities List and recommended the addition of 15 more. Superfund is the federal program that investigates and cleans up the most complex, uncontrolled or abandoned hazardous waste sites in the country.

The 10 sites added to the National Priorities List are:

Dwyer Property Ground Water Plume, Elkton, Md.
Washington County Lead District – Furnace Creek, Caledonia, Mo.
ACM Smelter and Refinery, Cascade County, Mont.
Mansfield Trail Dump, Byram Township, N.J.
Dewey Loeffel Landfill, Nassau, N.Y.
Wright Chemical Corporation, Riegelwood, N.C.
Milford Contaminated Aquifer, Milford, Ohio
Cabo Rojo Ground Water Contamination, Cabo Rojo, Puerto Rico
Hormigas Ground Water Plume, Caguas, Puerto Rico
West County Road 112 Ground Water, Midland, Texas

And the following 15 sites have been proposed to the National Priorities List:

Blue Ledge Mine, Rogue River – Siskiyou National Forest, Calif.
New Idria Mercury Mine, Idria, Calif.
Sandoval Zinc Company, Sandoval, Ill.
Gary Development Landfill, Gary, Ind.
Sauer Dump, Dundalk, Md.
Kerr-McGee Chemical Corp, Columbus, Miss.
Red Panther Chemical Company, Clarksdale, Miss.
Garfield Ground Water Contamination, Garfield, N.J.
MolyCorp Inc., Questa, N.M. (re-proposal)
New Cassel/Hicksville Ground Water Contamination, New Cassell/Hicksville, N.Y.
CTS of Asheville, Inc., Asheville, N.C.
Astoria Marine Construction Company, Ore.
North Ridge Estates, Klamath Falls, Ore.
US Finishing/Cone Mills, Greenville, S.C.
Alamo Contaminated Ground Water, Alamo, Tenn.

There have been 1,637 sites listed on the National Priorities List to date. Of those, 347 have been removed, leaving 1,290 current sites on the NPL. There are a total of 1,356 final and proposed sites.

Photo: NASA image of The Berkeley Pit in Montana.