Abstract
0.720 m/day indicating low conductivity. The transmissivity (T) values ranged between 1.47 m 2 /day and 17.40 m 2 /day, showing that the area has low to intermediate transmissivity capacity that can meet withdrawals for local water supply. The 2-D profiles distinctly delineated subsurface layers and contamination zones were also found within the aquifer units in the study area. These zones occurred at several traverses with resistivity values less than 31 Ωm and thickness variations from 5 m to 25 m. The leachate seeped to the bottom in vertical motion as seen at the eastern part of the dump site. This could be as a result of the relative permeability of the overburden, possible linear features and the downward sloping of the bedrock topography towards the dumpsite in that area. At the southern part of the dumpsite, the leachate is inferred to migrate laterally, which could imply that the neighboring rocks are relatively porous and permeable. This migration is considered slow because there was no trace of contamination 200 m away from the dumpsite.
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