GroundWater capability

Transcription

1 GroundWater capability

2 About Ramboll Ramboll is a leading engineering, design and consultancy company founded in Denmark in We employ close to 10,000 experts and have a significant presence in Northern Europe, India and the Middle East. With close to 200 offices in 21 countries we emphasise local experience combined with a global knowledge-base. We constantly strive to achieve inspiring and exacting solutions that make a genuine difference to our customers, end-users and society as a whole. Ramboll works across the markets: Buildings, Transport, Environment, Energy, Oil & Gas and Management Consulting. OUR ENVIRONMENTAL SERVICES Ramboll s 1,000 environmental specialists produce bespoke solutions that help clients integrate sound environmental practice while achieving their project aims. In an increasingly complex regulatory and ethical culture, we offer clear guidance on how to deliver projects that are in harmony with their environment. From advice and assessment pre- and postplanning our work is diverse and innovative. We seek to integrate climate change adaption and sustainability into all of our projects. Whatever the context, we provide the expertise necessary to support our clients in successfully navigating the planning process.

3 groundwater We offer wide ranging services in the groundwater sector. From assessment of groundwater quality to determining the impact of development upon the groundwater regime, we have the expertise to assist. Groundwater cannot be considered in isolation. Working within multidisciplinary teams, our experts take a holistic approach to. These may include, for example, examination of ground and surface waters, geological factors, ecological constraints and development risks. The water environment is complex, with interactions between elements above and below ground, and with chemical, physical and biological variation. Development affects both the quantity and quality of this vital natural resource. Ramboll s specialists can assess the hydrogeological regime of small sites and on a regional basis. Our are tailored towards the development or research purpose, and we have the capability to share our skills and resources internationally. Who Would Benefit? We offer services to private developers and to local authorities and government organisations. Services can be offered at all stages of project development. Our Services Hydrogeological investigations pumping tests and analysis remediation, including bespoke methodologies Ground and surface water monitoring and sampling quality risk modelling Piling risk flooding risk Regional groundwater mapping Water Framework Directive Geophysical surveys vulnerability Water environment protection measures for Construction Environmental Management Plans (CEMP) Sustainable drainage systems (SUDS) HAWRAT for highways projects resource studies GIS V1_102011

4 Groundwater Quality Assessments and Remediation Ramboll has extensive experience in the assessment of groundwater quality, and the remediation of polluted groundwater From small projects, to some of the most contaminated land in the UK, our experts have successfully carried out investigative and remedial works across a wide variety of sites. Some of our remediation projects have benefitted from bespoke techniques, developed in-house. At Ramboll, we aim to give the best advice to clients, while also liaising with key organisations such as local authorities and the Environment Agency. Kerosene Spill, Dumfries We supported the client from initial site investigation and remediation options appraisal through to project completion Ramboll was commissioned by GB Oils Ltd to undertake a site investigation which delineated the extent of a 17,000 litre kerosene spill. We then drafted a remediation options appraisal and carried out a remediation pilot trial using equipment and support from Ramboll Denmark. Following selection of the most appropriate technique, our specialists advised the contractor on installing and running a bioslurp unit to address free phase contamination. Dissolved phase contamination was tackled using a controlled waters detailed quantitative risk assessment. We have now completed the remediation works and carried out a groundwater monitoring programme to quantify any potential rebound. Mersey Gateway Project Our experts are overseeing the remediation of one of the most contaminated sites in the UK As part of the 600m Mersey Gateway project, Ramboll is supervising the clean-up of ICI s Widnes Experimental Works; one of the UK s most contaminated sites where chlorinated solvents were tested and produced. Following several stages of investigation and risk assessment, we agreed a remediation strategy with the regulators. This consists of groundwater abstraction, high vacuum extraction (of water and ground vapours) and in situ chemical oxidation of groundwater. We went on to produce the specification for the remediation works and tender the contract on behalf of the client. Remediation is currently ongoing. Fuel Station Remediation, Portsmouth As a result of our thorough research and proactive role on site, potential health impacts were avoided In accordance with UK guidance and best practice, we carried out thorough reviews of information on this former fuelling station and vehicle workshop site which was to be redeveloped for residential use. Our experts examined ground investigation data, interpretive reports, detailed quantitative risk, remediation strategies and verification reports. We then took a proactive supervisory role on site during the remediation works, liaising extensively with all parties involved and recommending further investigation and remediation where necessary. Following our identification of significant fuel release, a plan to remove hydrocarbons from the groundwater using a range of techniques was successfully completed.

5 Groundwater Flooding and Interactions with Surface Water Our experts are able to assess the potential for groundwater flooding in both new and existing developments Groundwater is increasingly being recognised as a key contributing factor to flooding within the UK. There is therefore a growing need for appropriate assessment. Ramboll can undertake of groundwater flood risk arising from new and existing development, in particular, where basements or buried structures are present causing potential interference to the natural groundwater flow regime. Expert Advice for Groundwater Flooding We assessed various remediation options and also provided input on wider environmental issues Ramboll was employed as a technical expert to assess the groundwater flooding of a basement in a recently completed development. The flooding was caused by water ingress which was found to be related to the groundwater s hydrostatic pressure. We assessed various options to remediate the problem and advised on the wider environmental issues of groundwater pumping and discharge, including regulatory liaison, abstraction licensing and discharge consents. Independent Review of Flooding Occurrences A project involving the detailed examination of information on surface water, groundwater, drainage and local weather In 2012 persistent flooding occurred in Plumstead, South East London. This coincided with construction works for the Crossrail project which involved dewatering and recharge of groundwater. Our specialists carried out an independent review of the available data to ascertain whether the Crossail works could have contributed. The project involved the extensive review of surface water, groundwater, drainage, and weather details. It also required the development of geological and hydrogeological ground models to determine the likely pathways through which water may have moved to cause the flooding. Basement Flooding Impact Assessment Potential impacts were estimated through the creation of a threedimensional hydrogeological model We undertook an assessment of flood risk as part of a basement impact assessment for a proposed Notting Hill Gate redevelopment which comprised a multi-level basement. The assessment addressed the risk of basement flooding occurring at neighbouring properties as a result of the new development. A three-dimensional hydrogeological model was produced to estimate potential impacts; allowing for both climate change and uncertainty. The modelling determined that flood risks to neighbouring properties would be negligible. V1_102011

6 Groundwater Resources and Protection Services offered by Ramboll include geophysical surveys, geological modelling, and management and protection plans Our technical teams have the expertise to analyse geological and hydrogeological conditions to ascertain the state of groundwater resources on local and regional scales. Some of the key areas which we cover are: large scale geophysical surveys, geological and groundwater modelling to describe water balances, catchment areas and groundwater flow conditions, assessment of groundwater vulnerability, development of groundwater management and protection plans, and assessment of groundwater availability. National Danish Groundwater Mapping Programme Enabling detailed groundwater mapping of valuable abstraction areas across 40% of Denmark Ramboll has a framework agreement to assist the Danish Ministry of the Environment through multidisciplinary hydrogeological projects within Denmark. Our services range from the performance of field surveys, data processing and interpretation, plus geological and groundwater modelling to conclusive general recommendations regarding water supply strategies for specific abstraction areas. The results of this intensive hydrogeological mapping are used by the local governments to plan the management and protection of their groundwater resource and water supply. Groundwater Protection Plan, Ostrava Protecting the only aquifer with significant capacity which is available to this Czech city We developed a complex and coordinated protection plan which included the monitoring and mitigation of multiple contaminated sites in the catchment area of the Odra River as it flows through Ostrava. Extensive data research and analysis, together with groundwater modelling, was carried out to discover the extent of contaminant spreading. Thematic maps and cross sections were also generated based on GIS applications. Using all the available information, our scientists then created a strategy for prioritising cost-effective interventions against pollution sources threatening Ostrava s one major aquifer. BMW Group Pavilion, The Olympic Park, London Ramboll provided interdisciplinary services, including groundwater risk assessment, to an unmoveable deadline As a major Olympic sponsor, BMW was invited to create a showcase pavilion within the Olympic Park. Given the sensitive location and the Olympic Delivery Authority s strict environmental requirements, the delivery of our sub-structure design was dependent on the completion and approval of many environmental. These included contamination and water quality, flood risk and piling risk, the results of which were integrated into the Construction Environmental Management Plan (CEMP). Our end design prevented the risk of downward migration of contamination into the aquifer beneath.

7 Regional Groundwater Assessments We have substantial expertise in assessing groundwater quality at a regional scale The Water Framework Directive (WFD) requires all water bodies to be assessed in synchronisation; in other words according to their spatial catchment area as a natural geographical and hydrological feature. Groundwater quality can be impacted both on a local and regional scale, and Ramboll has substantial expertise within both these areas, culminating in significant input to Government guidance and the authoring of new guidance documents. Finnish Rail Administration Risk management for railways in groundwater areas This project for the Finnish Rail Administration involved Ramboll developing risk management techniques for groundwater areas which railway traffic passes over. It also included identifying and assessing risks for groundwater and creating the template for a target area card with information on specific groundwater areas and the railway routes that cross them. After a pilot scheme conducted in the area of the Regional Environment Centre of Southeast Finland, the risk management project has been adopted across Finland. INTERACTING RAMBOLL SERVICES Surface Water Groundwater CLIENT REQUIREMENTS RAMBOLL CAPABILITIES Geology Geotechnics Socio-economics Groundwater Ecology Land & Sediment Quality Drainage Assessment of construction & development impacts Basement Impact Assessment Flood Risk Assessment Provision of technical guidance documents Water Quality Assessment and Remediation WFD Assessments Licensing & water features surveys Environmental Impact Assessment Aquifer Status and Vulnerability Assessment Construction Environmental Management Plan Groundwater quality investigation and remediation Groundwater mapping Understanding of planning and public consultation Ground investigations, aquifer testing, water sampling and analysis, geophysical surveys Surveys of water features Geological conceptualisation 3D groundwater modelling Licensing and regulatory liaison Sustainability V1_102011

8 BUILDINGS TRANSPORT ENVIRONMENT ENERGY Oil & Gas Management Consulting