FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za
FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za
FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za
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94August 2010 8848• A storm water management plan, including sufficient erosion-<strong>co</strong>ntrol measures, must be<strong>co</strong>mpiled in <strong>co</strong>nsultation with a suitably qualified environmental practitioner / <strong>co</strong>ntrolofficer during the detailed design phase prior to the <strong>co</strong>mmencement of <strong>co</strong>nstruction;• Limit all activities to the proposed waste disposal site;• Extend the current surface water monitoring plan to include turbidity monitoring duringthe <strong>co</strong>nstruction phase of the disposal site;• Ensure that the operational storm water system is maintained and monitored;• Ensure that soil is stockpiled in such a way as to prevent erosion from storm water.Residual ImpactShould all the mitigation measures be implemented the impact on surface water will bedecreased and the significance lowered to MODERATE in the study area in the short term,the impact is there<strong>for</strong>e assessed as a Low impact.Table 27: Impact Rating Matrix <strong>for</strong> surface water during the <strong>co</strong>nstruction 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- Low11.1.5 GeotechnicalSeventeen test pits were excavated across the site <strong>for</strong> the proposed extension of the<strong>Boitshepi</strong> Waste Disposal <strong>Site</strong> using a Cat 428 backactor. The test pits were entered by aregistered professional engineering geologist who described the soil and bedrock <strong>for</strong>mationsin terms of the methods advocated by Jennings et al (1973) namely, moisture <strong>co</strong>ndition,<strong>co</strong>lour, soil <strong>co</strong>nsistency, soil structure, soil type and origin (MCCSSO). Disturbedrepresentative soil samples were re<strong>co</strong>vered from the test pits and submitted to SNALAB’s<strong>co</strong>mmercial soils laboratory in Pretoria <strong>for</strong> testing and identification, three water sampleswere submitted to RHC’s chemical laboratory in Pretoria <strong>for</strong> analysis.Soil samples were taken from the seventeen test pits and were subjected to various tests todetermine their geotechnical properties.Initial ImpactGradual to abrupt refusal of the backactor was experienced from below 2,0m in Zone “A”and at depths ranging from 0,3m to 3,1m below surface in Zone “B”. Moderate to strongZITHOLELE CONSULTING
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