2017-04-26_REVISION - M1977300

• Permit No: M1977300
• IBM Index Class Name: Revision
• Doc Date: 4/26/2017
• Doc Name: Request for Technical Revision
• From: Cotter
• To: DRMS
• Type & Sequence: TR25
• Email Name: MAC
• Email Name: WHE
• Media Type: D
• Archive: No

Technical Revision 25 Schwartzwalder Mine
Table of Contents
1.0 INTRODUCTION.............................................................................................................1
' 1.1 SUMMARY OF AMENDMENT TO TR-23....................................................................1
1.2 SUMMARY OF AMENDMENT TO TR-24....................................................................2
' 2.0 TR-23 AMENDMENT......................................................................................................4
2.1 DESCRIPTION OF ACTIVITY......................................................................................4
' 2.2 PREVIOUS RADIOLOGICAL CONTAMINATION ASSESSMENTS ..........................4
2.2.1 Gamma Walkover Survey........................................................................................4
2.2.2 Soil Sampling ..........................................................................................................6
' 2.3 SOIL CLEANUP CRITERIA ..........................................................................................9
2.4 EXCAVATION METHOD AND SURVEYS..................................................................9
2.5 AMENDED ATTACHMENT F.......................................................................................9
' 3.0 TR 24 AMENDMENT.....................................................................................................10
3.1 DESCRIPTION OF ADDITIONAL FACILITIES .........................................................10
' 3.1.1 Treated Water Storage Tanks.................................................................................10
3.1.2 Clean Water Tank..................................................................................................10
3.1.3 Ion Exchange Columns..........................................................................................13
' 3.1.4 Reactor Tank .........................................................................................................13
3.2 FACILITIES EVALUATION........................................................................................13
3.2.1 Site-Specific Conditions.........................................................................................13
3.2.2 Designated Chemicals............................................................................................13
' 3.2.3 Geological and Geochemical Conditions................................................................14
3.2.4 Monitoring and Sampling ......................................................................................14
' 3.2.5 Pollution Control Measures....................................................................................15
3.2.6 Demonstration of Adequate Containment...............................................................15
4.0 REFERENCES................................................................................................................16
' LIST OF FIGURES
Figure 1-1: RML License Areas.................................................................................................I
' Figure 1-2: New Water Treatment Plant Area.............................................................................3 Figure 2-1: Gamma Scan Results ................ 6
Figure 3-1: Future New Water Treatment Plant Diagram..........................................................I I
' Figure 3-2: Future New Water Treatment Plant Layout............................................................12
' ATTACHMENT F - Revised Inventory of Minnesota Adit Materials
Mine Permit M-1977-300
' Cotter Corporation(N.S.L.) i April 2017