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

112August 2010 884811.2.3 GroundwaterInitial ImpactThere is no evidence of significant groundwater contamination emanating from the site,although it is noted that BH4A has elevated TDS. During operational phase, the groundwatermanagement systems would have been installed, and therefore, there will be a reduction inthe impact of groundwater.During operational phase, the following would have been installed for the operation of thewaste disposal site, leachate collection system which will be equipped with suitable drains orcollection pipes that direct the gravity flow of leachate or leakage to defined collection pointsor sumps from which it can be collected for treatment and leakage detection systemconstructed to intercept any leachate that may pass the barrier of the liner. This leakage isthen directed to separate leakage collection sumps, where the quantity and quality can bemonitored and from which accumulated leakage can be removed or passed through to thesewer system. The potential for ground water contamination for the proposed waste disposalsite will be MODERATE.Additional ImpactThe additional impact during the operational phase remains as assessed Therefore theimpact remains as Moderate impact.Cumulative ImpactThe cumulative impact during the operational phase remains as assessed above since theadditional impact and the initial impact occur in the same area. Therefore the impact remainsas Moderate impact.Mitigation MeasuresRegular (six-monthly) sampling of groundwater levels and quality should be conducted toassess whether seepage/leaching from the proposed Boitshepi Waste Disposal Site isimpacting on the groundwater.In the event of such impacts being identified, appropriate engineering interventions must bedevised and implemented.It is recommended that any extension, including a liner system, is restricted to the areaconfirmed to be underlain by clay, i.e., the southern area.ZITHOLELE CONSULTING