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 possibility of significant harm
The Council is in the process of formally determining the sites and has confirmed it rates them Category 1 or Category 2.
The 40ha site was an ironstone quarry used for municipal waste landfill by Humberside County Council and its predecessors between 1945 and 1978.
Commercial units were built on the site between the 1960s and 1980s and 8ha of it is public open space.
The Council undertook an initial Phase 1 desk study in 2011.
A ground investigation report was prepared by the The Environmental Protection Group Ltd in 2013 and it concluded there is a significant possibility of significant harm from landfill gas and human health risks from direct contact pathways via exposure to near surface capping soils within a public open space.
A separate report on asbestos in the capping soils
was carried out by LQM the same year which concluded asbestos risks would not fall within Part 2A, although risks might need consideration under other legal contexts.
The Council has written to the 16 properties it considers to be Category 1 or 2 to warn them action is needed and to 36 others rated Category 3 to say monitoring is needed and annual checks will be carried out.
Checks were carried out on nearby residential properties in Lilac Avenue and Warwick Avenue in the 1990s and the Council says protection measures were put in place.
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 systems including pervious block paving, modular plastic sub-base replacement were used and roof discharges were via modular shallow diffusers into reservoir pavements. EPG worked in close collaboration with lead engineers T&G Consultants Ltd and the main contractor was Marett Construction Ltd.
At Grouville School a combination of modular narrow infiltration trenches in conjunction with a plastic gravel paved reservoir pavement was installed by contractor DB Cummins.
Jersey-based specialist SUDS company Permeable Paving Solutions Ltd supplied the systems and supervised the installations at both sites.
St. Martin’s School
Roof water discharged into reservoir pavement open graded sub-base via modular diffusers
Pervious concrete block paving finish under construction.
Grouville School Car Park
Modular soakaway trench system
Plastic modular gravel filled pervious paving system
EPG is pleased to announce that CIRIA has appointed Illman Young and EPG to produce updated SUDS construction guidance to compliment the updated SUDS Manual, which is soon to be issued.
Ensuring that SUDS construction works on site are completed correctly so that they deliver both the visual quality and functional performance intended is fundamental to any project. The target audience for this guidance will encompass all those who will have a direct input or influence during the construction works on site, and the handover of the design to the site team, and their ongoing inspections required during construction.
Sue Illman will lead the research and production of the guidance with the support of Steve Wilson and various staff from Illman Young, EPG and other industry experts.
EPG are very pleased to continue their longstanding involvement in the production of CIRIA SUDS guidance.
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.
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.
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.
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.
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.
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.
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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.