2016-01-14_REPORT - M1980244 ‎(15)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 1/14/2016
• Doc Name: Final Report Quality Assurance Monitoring & Test Results
• From: Cripple Creek & Victor Gold Mining Company
• To: DRMS
• Email Name: TC1
• Email Name: ERR
• Email Name: AME
• Email Name: WHE
• Media Type: D
• Archive: No

Cripple Creek & Victor Gold Mining Company
Squaw Gulch VLF Phase 1
(9,550-foot Elevation Bench to Geomembrane Panel P1635)
Final Report
Quality Assurance Monitoring & Test Results
January 2016
s:\projects\1125n squaw valley\8.0 engineer-design\8.1 reports-docs\phase 1 roc report-9550 up\01.report text\phase 1 roc report.docx i
C ONT ENT S
1.0 INTRODUCTION .............................................................................................................................. 1
1.1 Project Description .............................................................................................................. 2
1.2 Construction Quality Assurance/Construction Quality Control ............................................ 3
CQA Monitoring of Earthworks ............................................................................... 3
CQA/CQC Monitoring of Geosynthetics Installation ............................................... 4
1.3 Project Coordination ............................................................................................................ 5
Daily Construction Summary Reports .................................................................... 5
Weekly Construction Summary Reports ................................................................ 5
1.4 Project Technical Specifications .......................................................................................... 6
1.5 Record Survey Documentation ........................................................................................... 6
1.6 Certification Boundary ......................................................................................................... 6
2.0 SUMMARY OF EARTHWORK CONSTRUCTION ........................................................................... 7
2.1 Underground Workings Remediation .................................................................................. 8
2.2 Underdrains ......................................................................................................................... 8
Secondary Underdrain System .............................................................................. 8
Tertiary Underdrain System ................................................................................... 9
Geomembrane Installation of the Underdrain Ponds ............................................. 9
2.3 Site Grading ......................................................................................................................... 9
2.4 Subgrade Preparation ....................................................................................................... 10
2.5 Leak Detection ................................................................................................................... 10
2.6 Soil Liner Fill ...................................................................................................................... 10
2.7 Project Composite Liner System ....................................................................................... 11
2.8 High Volume Solution Collection System .......................................................................... 11
2.9 Drain Cover Fill .................................................................................................................. 12
3.0 GEOSYNTHETICS INSTALLATION .............................................................................................. 13
3.1 Underdrain System ............................................................................................................ 13
3.2 Leak Detection System ...................................................................................................... 13
40-mil Smooth LLDPE Geomembrane ................................................................. 13
3.3 Project Geomembrane Liner System ................................................................................ 13
4.0 EARTHWORK CQA TESTING AND MONITORING...................................................................... 14
4.1 Results of Laboratory Soils Testing ................................................................................... 14
Grain Size Distribution .......................................................................................... 15
Moisture Content .................................................................................................. 16
Atterberg Limits .................................................................................................... 16
Proctor Compaction Tests .................................................................................... 17
Permeability Tests ................................................................................................ 17
4.2 Field Testing and Monitoring ............................................................................................. 18
Underdrains .......................................................................................................... 18
Structural Fill ......................................................................................................... 18
Soil Liner Fill ......................................................................................................... 18
Drain Cover Fill ..................................................................................................... 19
Temperature Monitoring ....................................................................................... 20
5.0 GEOSYNTHETICS QC SUBMITTALS ........................................................................................... 21
5.1 Geomembrane Installation Personnel Résumés ............................................................... 21
5.2 Geomembrane QC Documents ......................................................................................... 21
Resin QC Certificates ........................................................................................... 21
Roll QC Certificates .............................................................................................. 21
Welding Rod QC Certificates ............................................................................... 22