FEIR for Boitshepi Landfill Site .pdf - Zitholele.co.za
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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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89August 2010 8848Type ofImpactCumulativeResidualAlternative Significance Spatial Temporal Probability Rating31-31-3LOWMODERATEMODERATEIsolatedsitesStudysiteStudysitePermanent Very Likely 1.9 - LowPermanent Will occur 3.3- HighPermanent Will occur 3.3- High11.1.3 GroundwaterGroundwater Consulting Services (GCS) (1996) identified deep and shallow aquifersseparated by a less permeable clay layer. This was confirmed by EnviroXcellence (2008)during the drilling of boreholes BH1, BH2 and BH3.According to GCS (1996) report, boreholes BH2, BH3 and BH4 are probably covered by thewaste body. Borehole BH3 is reported as BH1 in the GCS report. However; for currentreporting, by the GAA specialist the numbering observed onsite as reported byEnviroXcellence is used.Shallow aquiferThis is a perched aquifer (at depth between 0 and 10m) reported to be present in boreholesBH1, BH2, B4a and B4b drilled in the south of the waste disposal site . This aquifer was notobserved in borehole BH3, drilled in the north of the waste site. The recorded blow out yieldof 0.1l/s was considered insufficient for test pumping by EnviroXcellence, 2008. According tothe GCS (1996) report, the shallow boreholes reported as BH1a, BH2a, BH3a and BH4a(

90August 2010 8848ran for 8.5 minutes. These aquifer parameters should be used with caution and it could beadvisable to confirm these parameters by means of slug testing.BoreholeIDTable 24: Deep aquifer hydraulic properties GCS (1996)Test Analysis Boreholeduration Method yields (l/sec)(minutes)Static waterlevel (mbgl)Transmissivity(m2/day)BH1 3.085 18 Cooper Jacob

90August 2010 8848ran <strong>for</strong> 8.5 minutes. These aquifer parameters should be used with caution and it <strong>co</strong>uld beadvisable to <strong>co</strong>nfirm these parameters by means of slug testing.BoreholeIDTable 24: Deep aquifer hydraulic properties GCS (1996)Test Analysis Boreholeduration Method yields (l/sec)(minutes)Static waterlevel (mbgl)Transmissivity(m2/day)BH1 3.085 18 Cooper Ja<strong>co</strong>b

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