Ambatovy eBooks - page 7

Environmental Assessment Volume E
Tailings Facility Table of Contents
Ambatovy Project vi January 2006
R:\Active\2003\03-1322\03-1322-172_Dynatec\5300 Documentation\Final EA\Volume A
LIST OF TABLES
Table 1-1 Evaluation of Alternative Tailings Facility Locations................................................2
Table 3.1-1 Impact Description Criteria for Topography and Geomorphology .........................21
Table 3.1-2 Potential Effects and Residual Impacts for Topography and
Geomorphology .....................................................................................................22
Table 3.1-3 Residual Impact Classification for Topography and Geomorphology ...................23
Table 3.3-1 Project Interaction Matrix .......................................................................................31
Table 3.3-2 Assessment Criteria for Soils.................................................................................33
Table 3.3-3 Disturbance of Soil Types in the Tailings Area......................................................36
Table 3.3-4 Residual Impact Classification for Soils.................................................................37
Table 3.6-1 Description of Risk Criteria for Mining ...................................................................43
Table 3.7-1 Groundwater Quality in the Area of the Proposed Tailings Facility .......................52
Table 3.7-2 Impact Description Criteria and Numerical Scores for the Ambatovy
Project – Hydrogeology .........................................................................................56
Table 3.7-3 Reduction in Groundwater Component to Stream Flows – Operations
Phase.....................................................................................................................57
Table 3.7-4 Reduction in Groundwater Component to Stream Flows – End of
Decommissioning Phase .......................................................................................58
Table 3.7-5 Groundwater Recovery System Schedule of Interceptor Boreholes .....................59
Table 3.7-6 Residual Impact Classification for Hydrogeology ..................................................62
Table 3.8-1 Mean Monthly Rainfall (mm) for Tailings Facility...................................................66
Table 3.8-2 Maximum Daily Precipitation Frequency Analysis for Tailings Facility..................67
Table 3.8-3 Derived Monthly and Annual Runoff for Tailings Facility .......................................67
Table 3.8-4 Impact Description Criteria and Numerical Scores for the Ambatovy
Project – Surface Water Hydrology .......................................................................70
Table 3.8-5 Description of Development Phases and Potential Changes in Runoff
Characteristics .......................................................................................................72
Table 3.8-6 Drainage Areas Downstream of the Tailings Facility.............................................77
Table 3.8-7 Estimated Reductions in Streamflow in Downstream Reaches – Average
Month .....................................................................................................................78
Table 3.8-8 Estimated Reductions in Streamflow in Downstream Reaches – Dry
Season Month........................................................................................................79
Table 3.8-9 Estimated Changes in Flow Characteristics(a) – Operation ...................................82
Table 3.8-10 Estimated Changes in Flow Characteristics(a) – Post-Closure ..............................82
Table 3.8-11 Residual Impact Classification for Hydrology ........................................................85
Table 3.9-1 Suggested target values for the natural marine environment, which should
be used as a monitoring guideline. ........................................................................95
Table 3.9-2 Suggested target values for the natural marine environment, which should
be used as a monitoring guideline. ......................................................................107
Table 3.9-3 Construction Phase Impacts on the Marine Environment ...................................115
Table 3.9-4 Operational Phase Impacts on the Marine Environment .....................................116
Table 3.10-1 Madagascar Classification System for Surface Water Quality ............................120
Table 3.10-2 Water Quality Constituents Assessed in the Tailings Facility Area .....................128
Table 3.10-3 Maximum Predicted Water Quality Concentration From Tailings Area
Versus Baseline and Guideline Values ...............................................................134
Table 3.10-4 Maximum Predicted Concentrations Above Baseline or South African
Guidelines (Operations and Post-Closure)..........................................................137
Table 3.10-5 Predicted Maximum Concentration in Bottom Sediment in the Tailings
Area Versus Baseline and Guideline Values.......................................................139
Table 3.11-1 Key Viewpoints: Tailings Facility Area.................................................................143
Table 3.11-2 Impact Description Criteria for Visual Aesthetics.................................................144