Azura-Edo Independent Power Plant Environmental Impact ... - IFC

higher heterotrophic fungi concentrations at the southern portion of the
Project site. Furthermore the heavy metals and hydrocarbons were relatively
low; however at one of the samples taken at the portion located directly west
of the NIPP plant demonstrated a high hydrocarbon reading indicating
previous hydrocarbon spillage.
4.6 HYDROLOGY AND GEOHYDROLOGY
4.6.1 Hydrology
No streams or rivers were identified on the Project site. A small pond is
located approximately 800 m to the north of the boundary of the proposed
site. The neighbouring NIPP plant proposed to pump the site effluent (mainly
rainwater) to this pond which then drains into Ikpoba River during the rainy
season. The Ikpoba River lies approximately 4 km east from the proposed site.
4.6.2 Geohydrology
Groundwater sampling was undertaken during the dry season at existing
boreholes located in the Ihovbor-Evboeka and Iguemokhua communities. The
borehole located in the Iguemokhua community was identified to fall
approximately 34 km away, it is therefore anticipated that this will not be
impacted on by the Project.
A second borehole was also sampled in the Ihovbor-Evboeka community
during the wet season, in addition to an existing borehole in the Orior-
Osemwende community. The collected samples were analysed for physicochemical
properties, oil and grease, heavy metals, microbiological
characteristics, and THC. In situ field analysis measurements of pH,
conductivity, Total Dissolved Solids (TDS), Total Suspended Solids (TSS),
Salinity, Dissolved Oxygen (DO) and temperature were taken using handheld
in situ water sampling metres at the various sampling locations. Laboratory
analysis was conducted on the samples by Searchgate Laboratories Limited
(an FMEnv accredited laboratory) in Ifako-Gbagada, Lagos.
The sampling locations of the boreholes (sampling points) are illustrated in
Figure 4.4. Further details of the equipment used for sampling and latitude
and longitude coordinates of the sampling locations are contained in Annex B.
AZURA EDO IPP
4-16
DRAFT EIA REPORT