2021-01-04_GENERAL DOCUMENTS - C1981019

• Permit No: C1981019
• IBM Index Class Name: General Documents
• Doc Date: 1/4/2021
• Doc Name Note: CO0045161
• Doc Name: Correspondence
• From: Colowyo Coal Company
• To: DRMS
• Email Name: ZTT
• Email Name: JDM
• Media Type: D
• Archive: No

DocuSign Envelope ID: EBE28081-13782-41342-BAD13-D8C9313687131B
fOXICITY REDUCTION EVALUATION LINES OF INVESTIGATION
Table of Contents
EXECUTIVE SUMMARY...............................................................................................................I
ABBREVIATIONS........................................................................................................................ II
GLOSSARY................................................................................................................................. III
1.0
INTRODUCTION............................................................................................................1.1
1.1
PURPOSE......................................................................................................................1.1
1.2
PROJECT BACKGROUND............................................................................................1.1
2.0
DESIGN BASIS.............................................................................................................2.2
2.1
INFLUENT WATER QUALITY.......................................................................................2.2
2.2
DESIGN CONCEPT.......................................................................................................2.3
2.2.1 Reverse Osmosis/Nanofiltration...................................................................
2.4
2.2.2 Biological Sulfate Reduction.........................................................................2.7
3.0
COST EVALUATION...................................................................................................
3.12
3.1
SUMMARY OF DESIGNS............................................................................................3.12
3.2
ESTIMATE CLASSIFICATION.....................................................................................3.13
3.2.1 Cost Estimating Methods............................................................................3.13
3.3
CAPITAL COSTS.........................................................................................................3.13
3.3.1 Value Engineering Opportunities................................................................3.14
3.4
OPERATIONAL COSTS..............................................................................................
3.15
4.0 SUMMARY OF ANALYSIS.........................................................................................4.17
5.0 CLOSURE....................................................................................................................5.18
6.0 REFERENCES.............................................................................................................6.19
LIST OF TABLES
Table 1 - Outfall 010 Water Quality Basis..................................................................................2.2
Table 2. Capital Cost Summary...............................................................................................3.14
Table 3. NF Membrane Separation Operational Cost Estimate...............................................3.15
Table 4. BSR Bioreactor Treatment Operational Cost Estimate..............................................3.16
LIST OF FIGURES
Figure 1 - Outfall 010: Flow and Sulfate Concentrations...........................................................2.3