Laserfiche WebLink
Cotter Corporation Water Quality Assessment C00036251 <br />APPENDIX A <br />Water Quality Assessment <br />Unnamed tributaries of East Paradox Creek and Bull Canyon to the Dolores <br />River <br />Cotter Corporation, JD -7 And JD -9 Mines <br />Table of Contents <br />I. WATER QUALITY ASSESSMENT SUMMARY 1 <br />II. INTRODUCTION 3 <br />III. WATER QUALITY STANDARDS 5 <br />Narrative Standards 5 <br />Standards for Organic Parameters and Radionuclides 5 <br />Salinity and Phosphorus 7 <br />Segment Specific Numeric Standard 7 <br />Table Value Standards and Hardness Calculations 9 <br />Regulation 93 — 303(d) List, Total Maximum Daily Loads and Monitoring and Evaluation List 11 <br />IV. RECEIVING STREAM INFORMATION 12 <br />Low Flow Analysis 12 <br />Mixing Zones 14 <br />Ambient Water Quality 14 <br />V. FACILITY INFORMATION AND POLLUTANTS EVALUATED 16 <br />Facility Information 16 <br />Pollutants of Concern 17 <br />VI. DETERMINATION OF WATER QUALITY BASED EFFLUENT LIMITATIONS (WQBELs) 18 <br />Technical Information 18 <br />Calculation of WQBELs 19 <br />Agricultural Use Parameters (SAR and EC): 21 <br />VII. ANTIDEGRADATION EVALUATION 21 <br />VIII. REFERENCES 22 <br />I. Water Quality Assessment Summary <br />Table A -1 includes summary information related to this WQA. This summary table includes key <br />regulatory starting points used in development of the WQA such as: receiving stream information; <br />threatened and endangered species; 303(d) listing; low flow and facility flow summaries; and a list of <br />parameters evaluated. <br />Appendix A (WQA V 7.0) <br />Page 1 of 23 Last Revised 06/10/10 /AO <br />