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~-~ <br />October 2004 / ~ . Zj <br />-i- <br />,~- ~ 4~~- any <br />io-~~- o~ <br />043-2170 <br />• TABLE OF CONTENTS <br /> 1.0 INTRODUCTION ................................................................................................. ............. l <br /> 1.1 Project Description ................................................................................................ ..............1 <br /> 1.2 Construction Quality Assurance/Quality Control ................................................. ..............2 <br /> 1.2.1 CQA Monitoring of Ear[hworks ..................................................................... ..............2 <br /> 1.2.2 CQA/CQC Monitoring of Geosynthetics Installation .................................... ..............3 <br /> 1.3 Project Coordination ............................................................................................. ..............4 <br /> 1.3.1 Daily Construction Summary Reports ............................................................ ..............4 <br /> 1.3.2 Weekly Construction Summary Reports ........................................................ ..............5 <br /> 1.4 Project Specifications ............................................................................................ ..............5 <br /> 1.5 Record Survey Documentation ............................................................................. .............. 5 <br /> 1.6 Certification Boundary .......................................................................................... .............. 6 <br /> 2.0 SiJNIMARY OF EARTHWORK CONSTRUCTION ........................................ .............7 <br /> 2.1 Underground Workings Remediation ................................................................... ..............8 <br /> 2.1.1 Remediation of Shafts, Stopes, and Shallow Surface Pits .............................. .............. 8 <br /> 2.1.2 Remediation of Laterals/Inclines/Adits .......................................................... ............10 <br /> 2.2 Underdrains ........................................................................................................... ............10 <br /> 2.3 Leak Detection System ......................................................................................... ............10 <br /> 2.4 Site Grading .......................................................................................................... ............11 <br /> 2.5 Subgrade Preparation ............................................................................................ ............11 <br /> 2.6 <br />2.7 Soil Liner Fill ........................................................................................................ <br />Ore Storage Area Composite Liner System .......................................................... ............ l l <br />............12 <br /> 2.8 High Volume Solution Collection System ............................................................. ...........13 <br /> 2.9 Drain Cover Fill .................................................................................................... ............13 <br /> 2.10 Surface Water Diversion System .......................................................................... ............14 <br /> 3.0 GEOSYNTHETICS INSTALLATION ............................................................... ...........15 <br /> 3.1 Underdrains ........................................................................................................... ............15 <br /> 3.2 Leak Detection Trench ........................................................................................... ........... I S <br /> 3.3 Ore Storage Area ...........................................................................:....................... ............15 <br /> 3.4 Underground Workings ......................................................................................... ............16 <br /> 4.0 EARTHWORK CQA TESTING AND MONITORING .................................... ...........17 <br /> 4.1 Results of Laboratory Soils Testing ...................................................................... ............17 <br /> 4.1.1 Grain Size Distribution .................................................................................... ...........18 <br /> 4.1.2 Moisture Content ............................................................................................ ............19 <br /> 4.1.3 Atterberg Limits ............................................................................................. ............19 <br /> 4.1.4 Proctor Compaction Tests .............................................................................. ............20 <br /> 4.1.5 Permeability Tests .......................................................................................... ............20 <br /> 4.1.6 Bulk Specific Gravity ..................................................................................... ............21 <br /> 4.2 Field Testing and Monitoring ............................................................................... ............21 <br /> 4.2.1 Underground Workings ................................................................................... ...........21 <br /> 4.2.1.1 Concrete Plug and Cemented Rockfill ................................................. ............21 <br />• 4.2.1.2 Geogrid and Select Structural Fil1 ........................................................ <br />4.2.2 Underdrains .................................................................................................... ............22 <br />............22 <br /> <br /> '/ <br /> ,:w~„~~e~,~~-,~.e,,=„a~,,,~~.~~,r~,~ Gotder Associates <br />