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

68August 2010 88488.2.1 Waste TypeTable 11 below is indicative of the types and volumes of wastes disposed of at the BoitshepiWaste Disposal Site in the past (data from 1998). The Western Vaal Metropolitan LocalCouncil and industries supplied historical information, for classification purposes.Approximately 50% of the waste stream on a mass basis comprised non-delisted, industrialwastes. In terms of the DWAs "Minimum Requirements for the Handling and Disposal ofHazardous Waste", a large proportion of these wastes can be classified as Hazardous (H)on the grounds of the industrial group (metal manufacture, metal goods and engineering), aswell as the process of manufacture (ferrous metallurgy) (Table 11).From initial visual assessments by the Consultants it appeared that, although the wastecould be classified as Hazardous, it is mostly of a high volume, but of low hazard content,which would probably place it in the low to moderate Hazard Rating.The results of chemical analyses on the wastes received from Cape Gate (Pty) Ltd 8 (a localsteel producer) historically indicate that the slag, the fume plant dust and the iron hydroxidesludge are, in terms of the Department's classification system, either highly hazardous orextremely hazardous (Table 11). The sludge water, also disposed of on the site, is of a lowhazard rating in terms of its Estimated Environmental Concentration (EEC). It is howevernoted that Cape Gate only disposes of electric arc furnace slag, general waste and builderswaste at Boitshepi as of the last few years.Table 11 below reflects the types and volumes of wastes currently disposed of at theBoitshepi Waste Disposal Site (2008). The following assumptions were made in thecalculations:• Cover ratio 1:5 (assumed available);• Initial Rate of Deposition = 2,737,351 tonnes per annum;• Annual growth rate = 2%; and• Add 1,032 households @ 1.39 kg/S-Pan/ day added in at year 2.Approximately 29% of the current waste stream on a mass basis comprises delistedindustrial wastes, approximately half of the previous disposal rates as shown in the Table 11below.8 Please note that Cape Gate has for years disposed of it demetalised electric arc furnace slag atBoitshepi at the request of the municipality who has used the slag for daily cover. A hazard rating forthe EAF slag was undertaken and it has subsequently been de-listed for disposal at a GLB + site.ZITHOLELE CONSULTING