Schlumberger Water Services (SWS) conducts risk assessments for hazards that may be caused by potential release of a contaminant. These assessments are key to creating a strategy and to making future risk management decisions. Project components include the following.
Environmental risk assessment of carcass and C&D disposal sites Location - England and Wales Client - Department for Environment, Food and Rural Affairs Description - Following an outbreak of foot and mouth disease in 2001, SWS undertook retrospective risk assessments of all carcass and ash burial sites in England and Wales, and all cleansing and disinfection (C&D) disposal sites in Wales. A tiered risk assessment methodology was developed and applied to the sites that examined the ongoing risk of contamination of groundwater and surface water. The results were presented in a comprehensive database and included recommendations for monitoring and remedial action.
Transboundary flood management Location - Canada/USA Client - International Joint Commission Description - The frequent flooding of the lower Pembina River into Manitoba, Canada, and North Dakota, USA, is the cause of an international dispute between the two governments. The International Joint Commission retained SWS to carry out a detailed hydrodynamic flood modeling study of the river to determine the causes of the flooding.
Cryptosporidium Risk Assessment
Location - Southern England Client - Southern Water Services Description - SWS developed a multicriteria decision analysis methodology for assessing the risk to public water supply groundwater sources of contamination by cryptosporidium (a protozoan parasite, the oocysts of which are resistant to most disinfection regimes). The methodology was applied to all Southern Water's groundwater sources to prioritize action and to form part of the official submission to the Drinking Water Inspectorate. The methodology has been published (QJEGH, Vol. 34, pp 187-194, May 2001).