Volume 34, Issue 1, 2013
Friday, December 6, 2013
The environmental assessment of the levels of background radiation and noise perturbation within the Rumuodara residential area of Port Harcourt, Nigeria has been carried out using a nuclear radiation monitor (Radalert-100) and a digital noise level meter (CEL 524 model) set on the A weighting scale respectively. The results obtained showed that the average exposure rate during the active period ranged between 11.4 to 16.0 μR/hr with an area mean exposure rate of 13.8 μR/hr whereas, the area mean background exposure rate recorded was 11.6 μR/hr. This result indicates an area mean deviation of 18.9% from normal background radiation exposure. Also, the average noise level measured during the active period ranged between 61.0 to 82.0 dB(A) with an area mean noise level of 73.2 dB(A) whereas, the area mean background noise level recorded was 48.5 dB(A). This result indicates an area mean deviation of 50.9% from normal background noise level. These results indicate radiation exposure rate above normal background radiation. Also, the noise levels recorded during the active period were greater than the background noise level and the World Health Organization limits set for speech interference, sleep disturbance and serious annoyance. Though the results obtained did not show that the use of power generating sets within the surveyed area can bring about deleterious health effect such as hearing impairment, their usage constitutes environmental pollution since this has brought about instability in the normal environmental status of the area.