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Jennifer Lane, EPA community involvement coordinator said "It does not look like it (the arsenic plume) is migrating."
Copper smelting began in at the site in 1910.Over several years site owners Atlantic Richfield Company added a lead-zinc sulfide flotation mill and a slag treatment plant for led and zinc recovery, according to The EPA Region 8 superfund website.
Copper production ceased in 1946 but lead smelting continued until1972 when the site permanently closed its doors, leaving acres of tailings, metals-contaminated slag, settling ponds, and smelter wastes, according to the Web site.
This left behind arensic and lead in and around the Pine Canyon area and the rail line that ran from the smelter to Tooele's east side.
A 1985 EPA study documented soils were affected by tailings from the site.
Blowing dust off tailing piles and illegal off-road motorcyclists and all-terrain vehicle users prompted the designation of the "Ca...
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