Reported and potential occurrence of ether oxygenates on water resources in the UK

New ISBN 9780852935156
Format: Paperback
Price: GBP81.00
Date Published: July 2009
Published by: Energy Institute

Ether oxygenates can be added to gasoline as octane enhancers. Their use has facilitated the desired replacement of lead and a decrease in the benzene content of gasoline. Further, improved combustion of the gasoline improves the quality of engine exhaust emissions to the atmosphere.

Following leaks or spills of gasoline into the ground, ether oxygenates are more mobile in groundwater than gasoline-range hydrocarbons (GRH) and the potential to reach a down-gradient drinking water well is thus greater for ether oxygenates than GRH. The risk posed by gasoline ether oxygenates (GEOs) to potable groundwater resources is one of taste and odour rather than human health.

In 1999/2000, the Energy Institute (EI) (formerly the Institute of Petroleum) and the Environment Agency conducted a collaborative study on the occurrence of GEOs in UK groundwater to assess the risk to potable water resources. The study was initiated following several States in the US banning the use of methyl tertiary butyl ether (MtBE) in gasoline, because of its occurrence in groundwater and the perceived risk to drinking water resources.

The 1999/2000 study concluded that MtBE did not pose a widespread risk to potable groundwater resources in the UK and modelling predicted that the risk was unlikely to change in the future, so long as there was not a major increase in MtBE usage.

In accordance with recommendations from the 1999/2000 report this study was repeated in 2007/2008 to monitor the situation and test the predictions. This report contains the findings of the recent study and compares them to those from the original study. Also included is a comparison of occurrence of MtBE in the US.

Suggested audience: Local authorities, water companies, environmental regulators, environmental managers for petroleum industry, chemical analysts, environmental policy managers.

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