HYDRO29927

• Permit No: M1986076
• IBM Index Class Name: Hydrology
• Doc Date: 1/12/1996
• Doc Name: PARTIAL REVIEW OF WATER MONITORING REPORTS INCAS MINE PN M-86-076
• From: DMG
• To: DGMC
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY _1!~!
Department of Natural Resources ~_p`~DFi^~
i 113 Sherman 51., Room 215 _p~~
Denver, CO 80203 f~NJ~`_
Phone:[phone]
FAX: [phone]
January 12, 1996
Mr. Hob Hill
DGMC
P.O. Sox 268, Route 1
Waltonville, IL 62894
RE: Partial Review of Water Monitoring Reports, Incas Mine,
Permit No. M-86-076
Dear Mr. Hill:
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Roy Romer
Governor
Michael B. Long
Division Doeao~
Our Mined Land Reclamation Hoard has asked that the Division staff
report to them, for each Designated Mining Operation in the State,
whether the operator is in compliance with environmental monitoring and
reporting requirements contained in the approved permit.
After reviewing the file for the Incas Mine, in particular the results
of the review for amendment no. AM-002 and the annual reports, it
appears that the required surface and groundwater sampling of surface
water and groundwater is not being done for the required 5 quarters as
agreed to in the review documents. To date, the annual report file
contains only one set of surface and groundwater samples, collected on
7/31/95. Please refer to item 5 of your February 25, 1995 letter to
the Division regarding the agreed to sampling frequency. It is
essential that 5 quarters of baseline hydrology data be taken prior to
processing and disposal of ore, and that subsequent to establishing
baseline (unaffected) values, an ongoing semi-annual or perhaps annual
monitoring plan be put in place to verify that mining activities are
not adversely affecting surface or groundwater quality.
Aa the amendment was approved in March of 1995, quarterly surface and
groundwater samples should have been taken and the results of the lab
analyses provided to the Division in the October, 1995 annual report
for the second and third quarters of 1995. It appears that we have
only received analyses for the third quarter. Since it was agreed that
samples were needed for 5 quarters, spaced 3 months apart and for the
specific sampling parameters agreed to during the review, it is
essential that additional sampling work be undertaken ae soon as
possible, weather permitting, to complete the baseline monitoring
requirement. Sampling results for an additional 4 quarters is needed,
with the results provided in the 1996 annual report submittal.
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