ENVIRONMENTAL IMPACT ASSESSMENT OF A PROPOSED TANKFARM
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ENVIRONMENTAL IMPACT ASSESSMENT OF A PROPOSED TANKFARM
ABSTRACT
This study was conducted to analyse the environmental implications of a proposed tankfarm in the Olokola Free Trade Zone in Ondo State.
It comprises a variety of field sampling, including soil, air, and noise samples from the proposed site. These samples were examined in the laboratory for criteria such as total hydrocarbon, pH values, total mean percentage of organic matter, heavy metal analysis, and cation concentration. The total hydro carbon ranges from 4.8 to 33.0 milligrammes per kilogramme.
(mg/kg) in the wet season and 4.0–78.5 mg/kg in the dry season. The THC indicates an unpolluted environment, and it is widely believed that soils with hydrocarbon levels less than 100 mg/kg are considered unpolluted.
In the dry season, iron had the highest mean concentration (2213mg/kg), followed by zinc (4.82mg/kg) and copper (3.78mg/kg), but in the rainy season, iron had 2039mg/kg, followed by zinc (8.68mg/kg) and copper (3.0mg/kg). The concentration of the monovalent cation in the soils was typically high. Sodium (Na) values ranged from 2,136 to 7,341 mg/kg.
Potassium (K) levels were between 0.09 and 0.15 mg/kg in the wet season and 0.04 and 0.45 mg/kg in the dry season. The increased sodium content may be attributable to the proximity.
From the study area to the ocean.
Suspended particle matter levels are higher in the dry season, with a value of 196 µg/m3, compared to 64 µg/m3 in the rainy season. When these data are compared to EGASPIN recommendations for national air quality standards, further air quality monitoring is required during the dry season
as it reaches a high of 196, albeit remaining within the EGASPIN (Environmental recommendations and Standards for Petroleum Industries in Nigeria) limit. Noise measurements revealed that the recorded levels differed greatly among locations.
Monitored levels varied from a low of 55.2dB to a high of 66.7dB during the dry season and 52.7dB to a high of 67.9dB during the wet season, compared to the World Bank requirement of 45 dB(A) for residential areas during the daytime.
It is advised that environmental performance be monitored on a regular basis to ensure compliance and take the required measures. The OKFTZ site is generally appropriate for the planned bulk fuel storage facility, and all environmental concerns may be mitigated and managed by establishing preventative measures and effective environmental management systems.
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