"Test wells drilled into the intermediate aquifer underneath the [E. Helena MT] Asarco smelting property in 2001 revealed arsenic present at 31 to 34 parts per million (i.e. 34 ppm in the water) — more than 3,000 times the federal standards for drinking water."
Asarco to present public updates (article from E. Helena MT Asarco plant)
Arsenic in Canal-water above the El Paso Water Utilities' (EPWU) Canal-street treatment plant near Asarco El Paso was 37 ppm, according to TCEQ (TNRCC) samples from '95. (DAMAGE CASES AND ENVIRONMENTAL RELEASES FROM MINES AND MINERAL PROCESSING SITES 1997 U.S. Environmental Protection Agency, page 215)
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