Category Archives: Uncategorized

Using purge and recovery tests in ground gas risk assessment

Purge and recovery tests involve removing gas from a monitoring well and recording the recovery in gas concentration immediately afterwards. The tests were often used in the early 1990s to assess gas emission rates, but were replaced by direct flow … Continue reading

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Guidance on waterproof basement construction and ground gas

Waterproof basement construction is, in many cases, inherently resistant to ground gas ingress. A simple process to design waterproof basements that also provide gas resistance is explained in this Ground Gas Information Sheet. The method does not require any special … Continue reading

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Dissolved methane monitoring for ground gas risk assessment

Ground gas monitoring data for risk assessment should ideally be obtained from monitoring wells installed in the unsaturated zone. Where groundwater is present in gas monitoring wells it may contain dissolved methane that can influence the measured gas concentrations in … Continue reading

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Ternary plots are commonly used to allow interpretation of ground gas monitoring results. There are various ways of plotting data in ternary graphs. This paper explains two different approaches that can be used and the implications that need to be … Continue reading

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EPG Latest News (July 2018)

Structural Waterproofing Designs As projects at Downe Leisure Centre; Lombard Street, London; Ulster University, Belfast and Surrey University in Guildford near completion, several others are underway incorporating structural waterproofing designed by EPG including Phase 3A of Battersea Power Station Redevelopment … Continue reading

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SPOSH identified in industrial units

A local authority is in the process of formally determining 16 industrial units on landfill gas grounds. 17 March 2016 / Contaminated land North Lincolnshire Council has written to 16 industrial premises in Scunthorpe warning them landfill gas concerns pose significant … Continue reading

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More SUDS schemes in Jersey

Following on from numerous successful projects on Jersey, EPG has designed zero discharge SUDS schemes for two schools at St Martin’s School and Grouville School for States of Jersey utilising a variety of techniques. At St Martin’s School numerous integrated … Continue reading

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Podium Deck Drainage Design for Willmott Dixon

Willmott Dixon is building the first phase of a regeneration project on a former industrial site alongside the Grand Union Canal at Brentford Lock, London. The development will eventually incorporate 520 new homes as part of a waterside community combining residential, … Continue reading

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Sarah Mortimer an addition to the team

EPG is pleased to announce the appointment of Sarah Mortimer as Principal Engineer based in the South East.  Sarah will be responsible for contaminated land and geotechnical projects across the UK and internationally.  She will also be involved in some … Continue reading

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