
The Arizona Department of Environmental Quality (ADEQ) is holding a public meeting
to receive public comments regarding the proposed surface water quality standards:
Wednesday, June 4, 2008 at 2:00 pm
Arizona Department of Environmental Quality
1110 W. Washington St., Room 3175, Phoenix, AZ
If you cannot attend this meeting, you can submit written comments.
The deadline for submittal of public comments on the proposed revisions to the surface water quality standards rules is by close of business on June 4, 2008. Written comments on the surface water quality standards rules should be addressed to:
Shirley Conard
Arizona Department of Environmental Quality
5415A-1
1110 W. Washington St.
Phoenix, AZ 85007
Email conard.shirley@azdeq.gov or Fax (602)771-4528
Pinto Creek is a free-flowing desert stream East of Superior Arizona. In both 1996 and 1997, American Rivers listed Pinto Creek as one of the nation's ten most endangered rivers due to the proposed Carlota Mine. This mine threatens the aquatic and riparian habitats of the creek. Now the Arizona Department of Environmental Quality is proposing to establish a site specific standard for dissolved copper in the stream and justifying this decision by indicating that much of the copper in the stream is due to natural background.
This use of natural background belies the longtime disturbance of the area from copper mining. This site specific standard for copper would allow for a much higher level of copper in the creek and would not be protective of aquatic life in the stream. The ADEQ’s choice of method for establishing this site-specific copper standard of 42 ug/L establishes the highest allowable level of copper that might be technically justified using the existing data and chosen methods of analyses. This is not, however, a protective standard for the designated uses of the Creek as mandated by the Clean Water Act, and does not recognize the significant existing disturbance and copper contribution to the stream caused by current and past mining activities. Please tell the ADEQ to reject this site-specific standard and ensure stronger protection for Pinto Creek and its wildlife.
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