The most popular configuration in vertical electrical sounding (VES) is the conventional Schlumberger array, which has a symmetrical layout with electrodes spread on either sides of the array spread. However, geophysical investigation especially in highly developed or congested and thickly vegetated areas proved very challenging due to the inaccessibility of sites to conduct soundings of symmetrical configuration of electrodes to the required spacing. This is often responsible for incompleteness of field data. Consequently, the asymmetrical array of electrodes in vertical electrical sounding as described by Nick and Katerina [18] as well as Akintorinwa and Abiola [19] and referred to as modified Schlumberger array (Hummel method) could be employed as an alternative to alleviate problems of space constraint.