FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za

126August 2010 8848Table 46: Impact Rating Matrix for ground water during the decommissioning phase(Alternative 1-3).Type of Significance Spatial Temporal Probability RatingImpactInitial HIGH Local Long TermCouldhappen2.2- ModerateAdditional MODERATE Study site Long Term Unlikely 1.2 – LowCumulative HIGH Local Long TermCouldhappen2.2- ModerateResidual MODERATE Study site Long Term Unlikely 1.2 – Low11.3.4 Surface waterInitial ImpactThe initial impact will remain as assessed in the construction and operational phases, that isa Moderate impact.Additional ImpactDuring the closure / decommissioning and rehabilitation phase, construction activities willtake place for the capping liner. Once the capping layer is installed on site and the site hasbeen re-vegetated the potential for polluted run-off from site will be minimal. However duringthe construction of the capping layer the impact will remain as assessed in the constructionphase as a Moderate impact.Cumulative ImpactThe cumulative impact will remain as assessed in the additional phase, a Moderate impact.Mitigation measuresThe mitigation measures as proposed in the construction phase are applicable.Residual ImpactThe residual impact will remain as per the construction phase, a Low impact.Table 47: Impact Rating Matrix for surface water during the decommissioning phase(Alternative 1-3).Type of Significance Spatial Temporal Probability RatingImpactInitial HIGH Local Short –Term Could happen 2- ModerateAdditional HIGH Local Short –Term Could happen 2- ModerateCumulative HIGH Local Short –Term Could happen 2- ModerateResidual MODERATE Study site Short –Term Could happen 1.4- LowZITHOLELE CONSULTING