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Minrec, Incorporated Water Quality Assessment CO- 0048233 <br />Parameter <br />Picocuries per Liter <br />Americium 241 * <br />0.15 <br />Cesium 134 <br />80 <br />Plutonium 239, and 240* <br />0.15 <br />Radium 226 and 228* <br />5 <br />Strontium 90* <br />8 <br />Thorium 230 and 232* <br />60 <br />Tritium <br />20,000 <br />*Radionuclide samples for these materials should be analyzed using unfiltered (total) samples. These <br />Human Health based standards are 30 -day average values for both plutonium and americium. <br />Organics: The organic pollutant standards contained in the Basic Standards for Organic Chemicals <br />Table are applicable to all surface waters of the state for the corresponding use classifications, unless <br />alternative site - specific standards have been adopted. These standards have been adopted as "interim <br />standards" and will remain in effect until alternative permanent standards are adopted by the <br />Commission. These interim standards shall not be considered final or permanent standards subject to <br />antibacksliding or downgrading restrictions. Although not reproduced in this WQA, the specific <br />standards for organic chemicals can be found in Regulation 31.11(3). <br />In order to protect the Basic Standards in waters of the state, effluent limitations and /or monitoring <br />requirements for radionuclides, organics, or any other parameter of concern could be put in CDPS <br />discharge permits. <br />The aquatic life standards apply to all stream segments that are classified for aquatic life. The water supply <br />standards apply only to those segments that are classified for water supply. The water + fish standards <br />apply to those segments that have a Class 1 aquatic life and a water supply classification. The fish <br />ingestion standards apply to Class 1 aquatic life segments that do not have a water supply designation. <br />The water + fish and the fish ingestion standards may also apply to Class 2 aquatic life segments, where <br />fish of a catchable size and which are normally consumed are present, and where fishing occurs on a <br />regular basis. <br />Because North Thompson Creek is classified for Class 1 aquatic life, with a water supply designation, <br />the water + fish, and aquatic life standards apply to this discharge. <br />Salinity and Phosphorus <br />Phosphorus: Regulations 71, 72, 73 and 74, for Dillon Reservoir Watershed, Cherry Creek Reservoir <br />Watershed, Chatfield Reservoir Watershed and the Bear Creek Watershed, contain requirements for <br />phosphorus concentrations and phosphorus annual loadings for point source dischargers. If a facility <br />discharges to one of these watersheds, a phosphorus allocation may be necessary, and limitations and <br />annual loadings may be added to a permit. <br />Salinity: Regulation 61.8(2)(1) contains requirements regarding salinity for any discharges to the <br />Colorado River Watershed. For industrial dischargers this is a no -salt discharge requirement. However, <br />Appendix A (WQa v 7.0) Page 5 of 25 Last Revised Sept 14, 2009 /ES <br />