Pinewood Studios – Gas Pressure Alleviation Design

EPG has recently been employed by Sir Robert McAlpine to design a gas pressure alleviation system for two landfill cells which are being developed for Backlot use as part of the expansion of Pinewood Studios in Slough, Berkshire.  The system has been designed to provide pressure relief within the landfill cells, enabling gas to be diluted within the system, prior to controlled discharge.  The system has been designed to address a number of concerns raised by the Local Authority Environmental Health Team, who were particularly concerned about excavations into the landfill cells and disturbance of the waste, potentially resulting in odour, dust and general air quality issues.  By using a no-dig vibro-column insertion system in the design of the pressure alleviation arrangement EPG were able to provide a design which resulted in none of the landfill waste material being excavated, a solution which clearly addressed the concerns of the Environmental Health Team, whilst minimising costs to the Developer and mitigating potential H&S risks associated with digging into the waste cells.


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SUDS design at Empress Business Park, Haydock

An EPG-designed SUDS scheme is currently under construction at a new business park adjacent to the A580 at Haydock in Merseyside by Colne-based contractor RecoBuild Ltd. Working in close collaboration with environmental consultant DG&A Ltd, EPG’s has designed a cost-effective source control solution that incorporates aggregate reservoir pavements, supplemented by shallow modular attenuation structures. The multi-phased development consists of circa 8000sq.m of warehouse and office buildings and approximately 13,000sq.m of external hardstanding areas.

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The SuDS Manual update

After almost 2 years of work, the updated SuDS Manual is due to be published on line at the end of July.  A lot of research and new understanding of SuDS has developed since the original manual was published and the updated version captures much of that information.  EPG has been involved in the preparation of some key new sections on designing SuDS in urban areas, including a vastly updated section on pervious surfaces that includes a whole range of surfacing options and a new approach to designing for water quality that focuses on performance in removing different types of pollution.

Steve Wilson, Technical Director of EPG is one of CIRIA’s SuDS trainers and if you would like to know more about the update do not hesitate to book on to a training course or request bespoke in house training from CIRIA via the following link.

Posted in Flood Risk and Drainage Impact Assessment, Projects, Provision of Training and Design Workshops, Sustainable Drainage, Sustainable Drainage Design, Water Management for Sports and Activity Surfaces | Comments Off

Another Blue Roof Design Completed

Following the successful completion of a further phase of Greenwich Wharf and the UNITE Stratford schemes, another blue roof system designed by EPG has recently been installed at the £30m Derwent London development at Chancery Lane. The system was integrated into the finishes of a ground level podium deck that forms a central courtyard and the system receives in flows from the roofs of the surrounding buildings and attenuates the stormwater resulting from the restricted discharge that is limited to only 6 l/s. Appointed by main contractor Morgan Sindall; EPG worked alongside the main project design team comprising architects Bennetts Associates; structural engineers AKTII and Arup services engineers.

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More Gas Protection Validation Surveys

Since the publication last year of CIRIA Guide C735 (refer June 2014 news article),  which provides good practice guidance on the verification and integrity testing of gas protection systems; EPG has undertaken validation testing and verification surveys on numerous projects for a variety of clients in various sectors including residential, schools and commercial developments.

EPG’s current survey workload includes the Telehouse North Two site in London Docklands for Careys and several schools in the Manchester area for Carillion.

Posted in Design of Hazardous Gas Protection Measures, Land Remediation Design, Projects, Sustainable Drainage, Testing and Validation Service | Comments Off

EPG and Illman Young deliver SuDS Masterclass in London March 2015

Steve Wilson and Sue Illman will present a SuDS Masterclass for the Landscape Institute in London on 25th March 2015.

This masterclass will provide a detailed introduction to the issues around planning and designing with SuDS.  It will review how and why the legislation has developed, and explain the currently proposed system (as far as is known), its benefits and weaknesses.  The principles of SuDS design will be explained, along with their component parts, and delegates will be shown how to approach integrated site design.  This will be demonstrated further by group work to plan a simple SuDS scheme for a site.

The technical aspects related to calculating a site’s rainfall storage volume will be (simply) explained, along with understanding the constraints that can arise from difficult site conditions, and the maintenance requirements for SuDS.

The design of attractive and effective SuDS, whilst ultimately quite simple, also has to fulfil a wide range of technical requirements; this course will enable delegates to understand what is involved, who they need to talk to, how to work with engineers effectively, and to start building a knowledge and understanding of this approach to integrated sustainable water design.

For further information, visit:

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Carillion appoints EPG for complex basement waterproofing design at Victoria Greengate Embankment, Salford

A joint venture partnership between Carillion, Ask Real Estate and Tristan Capital Partners is delivering a £56m mixed development on the site of the former Manchester Exchange railway station. Carillion, acting as main contractor has appointed EPG to produce the detailed waterproofing design for the basement that combines retail space, car parking and plant rooms. The challenge includes accommodating the waterproofing of existing masonry facades that must be retained and integrated into the redevelopment.

Construction is underway and completion is anticipated in Spring 2016.

Posted in Geotechnical Engineering Projects, Sustainable Drainage | Comments Off

Interserve appoints EPG for HLR Schools SUDS designs

Following on from the appointment to produce drainage designs for the Northampton Priority Schools package; Interserve’s Strategic Projects Division, based at the Birmingham Head Office has again appointed EPG to provide value engineered SUDS solutions for the £100m+ Hertfordshire, Luton and Reading Priority Schools Programme, which comprises:

  • Bishop’s Hatfield Girls’ School, Hatfield, Hertfordshire (academy)
  • Goffs School, near Cheshunt, Hertfordshire (academy)
  • Kings Langley School, Kings Langley, Hertfordshire (academy)
  • Longdean School, Hemel Hempstead, Hertfordshire (academy)
  • Reading Girls’ School, Reading, Berkshire (foundation)
  • Stopsley High School, Luton, Bedfordshire (foundation)
  • Westfield Academy, Watford, Hertfordshire (academy)

Working alongside principal consultant Arup, EPG Ltd was appointed to review surface water drainage proposals and to offer alternative solutions that provide practical, commercial and sustainability benefits.

Various source control techniques have been integrated into the designs including pervious pavements, aggregate filters, modular sub-base replacement, treatment channels and oil treating geotextiles.

Construction is due to start from November 2014.

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2012 Olympic Legacy paper accepted into the Proceedings of the ICE


The ICE has recognised the significance of a paper produced by Paul Pennington of EPG regarding the legacy of the 2012 London Olympics. EPG designed the water management and temporary lightweight upfill structures for the Equestrian Events at Greenwich Park in 2012 that produced many historic performances from team GB; however, the legacy does not just sit with medals, but also with the systems designed by EPG that have subsequently been reused for a variety of interesting European projects including the 2014 Commonwealth Games. The paper makes very interesting reading and can be downloaded from


The design remit for this prestige project was complex and very demanding due to the temporary nature of the development and the unique constraints associated with the Royal Park’s heritage and environmental setting, combined with exacting international equestrian eventing performance requirements for surfacing and construction tolerances. This required the construction of temporary platform structures comprising a combination of either steel/timber composites (designed by others) or lightweight high strength interlocking geocellular plastic elements. EPG was responsible for the design of all lightweight structures and surface water management for all platforms, including water harvesting to be re-used for the environmental conditioning of the overlying equestrian footings systems. The overlying equestrian footings systems were manufactured by Andrews Bowen from a unique sand & fibre mixture that required a specific moisture content to achieve optimum performance….

Posted in Flood Risk and Drainage Impact Assessment, Geotechnical Engineering Projects, Sustainable Drainage, Sustainable Drainage Design, Water Management for Sports and Activity Surfaces | Comments Off


EPG is pleased to announce that it has been accepted as a member of SAPCA’s Professional Services Group and is available to offer various specialist consultancy services to all members including sustainable drainage design, geotechnical and geo-environmental advice.

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