2011-08-18_HYDROLOGY - M1977306

• Permit No: M1977306
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/18/2011
• Doc Name: Colorado Discharge Permit System
• From: Water Quality Control Division
• To: Cotter Corporation
• Email Name: GRM
• Media Type: D
• Archive: No

Table A -2
Radionuclide Standards
Parameter
Picocuries per Liter
Americium 241*
0.15
Cesium 134
80
Plutonium 239, and 240*
0.15
Radium 226 and 228*
5
Strontium 90*
8
Thorium 230 and 232*
60
Tritium
20,000
Cotter Corporation Water Quality Assessment
*Radionuclide samples for these materials should be analyzed using unfiltered (total) samples.
These Human Health based standards are 30 -day average values for both plutonium and
americium.
C00036251
Organics: The organic pollutant standards contained in the Basic Standards for Organic Chemicals
Table are applicable to all surface waters of the state for the corresponding use classifications, unless
alternative site - specific standards have been adopted. These standards have been adopted as "interim
standards" and will remain in effect until alternative permanent standards are adopted by the
Commission. These interim standards shall not be considered final or permanent standards subject
to antibacksliding or downgrading restrictions. Although not reproduced in this WQA, the specific
standards for organic chemicals can be found in Regulation 31.11(3).
In order to protect the Basic Standards in waters of the state, effluent limitations and/or monitoring
requirements for radionuclides, organics, or any other parameter of concern could be put in CDPS
discharge permits.
The aquatic life standards apply to all stream segments that are classified for aquatic life. The water
supply standards apply only to those segments that are classified for water supply. The water + fish
standards apply to those segments that have a Class 1 aquatic life and a water supply classification. The
fish ingestion standards apply to Class 1 aquatic life segments that do not have a water supply
designation. The water + fish and the fish ingestion standards may also apply to Class 2 aquatic life
segments, where fish of a catchable size and which are normally consumed are present, and where
fishing occurs on a regular basis.
Because the unnamed tributaries of East Paradox Creek and Bull Canyon and the East Paradox Creek
and Bull Canyon are classified for Class 2 aquatic life, without a water supply designation, only the
aquatic life standards apply to this discharge.
Since the Dolores River is classified for Class 1 aquatic life, without a water supply designation, the
fish ingestion, and aquatic life standards apply to this discharge.
Appendix A (wQA V 7.0) Page 6 of 23 Last Revised 06/10/10 /AO