Report No. : GEO Report No. 82

Report Title : Contaminated Mud Disposal at East Sha Chau : Comparative Integrated Risk Assessment (1999), 138 p.

Author : EVS Environment Consultants

Abstract

A screening-level comparative integrated risk assessment was conducted to address public health and ecological concerns associated with the disposal of metals-contaminated mud at East Sha Chau. Seven target metals (cadmium, chromium, copper, lead, mercury, nickel and zinc) were included as contaminants of concern. The risk assessment integrated fishes, Chinese white dolphins and human receptors to provide a consistent framework within which to address potential environmental risks associated with disposal activities at East Sha Chau.

A comparative approach was used to estimate the relative risks predicted for East Sha Chau compared to an uncontaminated area (Tai Mun Wan ) and a contaminated area (Victoria Harbour) using data collected during the fall of 1995. Absolute risk estimates were calculated for East Sha Chau ising data collected during the period of 1993 – 1995. Relative risk estimates are useful to interpret the significant of absolute risk estimates in terms of ecological and public health.

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