HYDRO27683

• Permit No: C1981071
• IBM Index Class Name: Hydrology
• Doc Date: 7/27/1987
• Doc Name: NOTICE OF VIOLATION AND CEASE AND DESIST ORDER
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

e O O
5. Pursuant to the requirements of the permit, Colorado Yampa
sampled and analyzed the effluent at outfall 007. Colorado Yampa submitted
reports to the Division on the levels of pollutants in the effluent which
included the following data:
Reporting 30-day Average Concentration (in milligrams
Period per liter "mg/1") of dissolved manganese
November, 1986 0.496
December, 1986 1.03
January, 1987 1.03
February, 1987 0.870
March, 1987 0.592
April, 1987 1.29
6. In reports submitted by Colorado Yampa to the Division, the
reported 30-day average concentration total recoverable manganese was 1.09
mg/1 for December, 1986 and 1.49 mg/1 for April, 1987.
NOTICE OF VIOLATION
You are hereby notified that the facts stated above constitute
violations of Part I.A.4. in the permit, as set forth below:
1. The 30-day average concentrations for dissolved manganese for
November and December, 1986 and January, February, March and April, 1987
exceeded the 30-day average allowed by the permit of 0.174 mg/1 based on a
minimum of three samples collected on separate weeks within a 30-day period.
2. The 30-day average concentrations for total recoverable
manganese for December, 1986 and April, 1987 exceeded the 30-day average
allowed by the permit of 1.0 mg/1 based on a minimum of three samples
collected on separate weeks within a 30-day period.
CEASE AND DESIST ORDER
Based upon the foregoing findings of fact and notice of violation,
and pursuant to the provisions of 25-8-605, C.R.S. (1982), I hereby order you
to:
1. immediately take whatever measures necessary to cease and desist
violating the permit and the Water Quality Control Act, 25-8-101 to 703,
C.R.S. (1982 and 1985 supp.) and regulations promulgated thereto;
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