ESI is the UK’s leading independent scientific and environmentalconsultancy specialising in water resource management, land quality andground source energy. As a technical specialist advisor to corporate andgovernmental clients ESI is respected for its pragmatism, sound scienceand strong commercial focus.Landfill and Waste ManagementESI delivers a leading capability in landfill management in the UK andEurope. A detailed technical understanding with experience of the keyissues involved in field regulation, data management, ongoing monitoringand risk assessment makes ESI the consultancy of choice.Environmental Permits for Waste Management SitesUnder the Environmental Permitting (EP) • Ecological assessment (if the site is Regulations (2010), the development of close to a European Habitats site).a conceptual model and the preparationof environmental risk assessments ESI provides support in preparingare required for all sites prior to a applications, reviewing permitpermit being issued. The following risk conditions, evaluating the success ofassessments must be included in an sites in achieving compliance criteria,application for an Environmental Permit: and negotiating permit issues with regulatory authorities. With extensive• Hydrogeological experience across all types of waste• Landfill gas disposal sites, including hazardous,• Stability non-hazardous and inert landfills, ESI• Nuisance and health (including an is a natural choice to coordinate the assessment of particulate matter, preparation of applications. noise, dust, odour and vermin.)Environmental Impact Assessments Environmental Assessments are managers have excellent working an established part of the planning relationships with contacts in all regions process. The sequence of scoping of the Environment Agency, which is requests, site investigation, impact important in developing a sense of trust assessment and negotiation with in this process. Senior members of the regulators has become common consultancy team have also provided practice. ESI provides the support Expert Witness support in public required throughout the process from enquiries and court cases. the initial scoping requests through to completion of the Environmental Water resources and, in particular, Statement and Environmental Impact groundwater are a key component Assessment. of many Environmental Impact Assessments. Landfills (for hazardous Clients have benefited from ESI’s and non-hazardous waste) and pragmatic and technically robust quarries (over a certain size) are among approach. Discussion and negotiation those developments that fall under between developers and the regulators Schedule 1, and therefore require an to agree the scope of investigations is Environmental Impact Assessment and essential to ensuring a cost-effective an Environmental Statement at the outcome. ESI’s experienced project planning stage.
Landfill Monitoring Support Service ESI has frequently been retained to • The design of environmental assist with the development of landfill monitoring networks and suitable monitoring networks, protocols and borehole design specifications the establishment of data management systems. The range of chemicals that • Review and assessment of present a potential environmental threat monitoring facilities - effectiveness, is wide and varied, and it is important quality, sufficiency and positioning that monitoring points are correctly • Supervision of the installation of new positioned and precisely installed monitoring facilities to ensure that the data collected is sufficient and reliable. • Identification of the reasons for unreliable or unrepresentative data Consultants use their experience and expertise to build an understanding • Production of monitoring protocols of the potential contaminant transport with due consideration of regulatory routes around a site and to design requirements, best practice and cost- monitoring and sampling systems that efficiency meet the needs of the operator and • Advice on appropriate monitoring of the regulator. Advice is provided suites for requisite surveillance on appropriate assessment criteria (control and trigger levels). ESI’s service • On-going data management, offering includes: analysis, interpretation and reportingLandfill ReportingEmissions and monitoring of an • Collation of monitoring data into a environmental permit for a landfill secure databasesite typically includes specificmonitoring requirements for landfill • Manipulation and interpretation of gas, surface water, groundwater, and monitoring dataleachate (where appropriate) and is • Concise quarterly and annual usually required on a quarterly and reportingannual basis. • Liaising and conducting dialogue with ESI’s reports allow for a thorough the Environment Agencyreview of the environmental monitoringdata that has been obtained during ESI’s knowledge base of soil andthe year and an assessment of any groundwater science enables promptpatterns or trends that are seen within and effective tackling and addressingthe data, particularly in relation to any of issues that arise at both new andcompliance level exceedences that may existing sites in an innovative andhave occurred. Services include: practical manner. A proven track record and working relationships with• Environmental monitoring and data regulatory authorities enables pragmatic management discussions and satisfactory solutions• Compliance reporting when more complex issues arise.Landfill Surrender Applications Landfill sites are closely regulated demonstrate that the risk from the and there is an onus on site owners site is no worse than it was when the to manage sites and their associated environmental permit was issued. environmental liabilities for as long This is achieved via the production as they continue to pose a risk to of a landfill surrender report. the environment. Over time there is a Landfill surrender reports require an gradual decrease in the concentrations assessment of the current condition of of potential contaminants present the landfill and its surroundings. in landfills and there comes a point when they no longer pose a risk to ESI has assisted a number of operators environmental receptors. At this point, to achieve landfill completion with the the landfill licence or permit can be result that these sites are no longer surrendered and the site is said to a liability and can be developed for be completed. subsequent use thus transforming a liability into an asset. In order to surrender a licence or permit, the site owner must
Closed Landfill SupportClosed landfill sites fall into two • Development of a robust sitecategories, those regulated by a conceptual model to determine Waste Management Licence (WML) environmental risks/ Environmental Permit which arethe responsibility of the Environment • Identification of data gaps and Agency, and those closed prior to additional monitoring and 1994 which did not require a WML infrastructureand are the responsibility of the Local • Design of environmental monitoring Authority and likely to fall within the networks and suitable borehole purview of Part 2A of the Environmental design specificationsProtection Act. • Production of a site-specific ESI provides bespoke support to local environmental monitoring scheduleauthorities and businesses in relation toissues arising from closed landfills. The • On-going data management, service offering includes: analysis, interpretation and reporting• Review and interpretation of existing • Construction of a risk assessment to historical reports and data sets assess the level of risk posed by the landfill site to relevant • Development of a screening matrix environmental receptors. to help eliminate sites that do not pose a threat to the environment and to prioritise those of most concernHydrogeological Risk Assessments for Landfill A site-specific hydrogeological risk represent conditions as accurately assessment (HRA) must be included as possible. in all applications for an Environmental Permit (EP) for a waste disposal ESI has its own in-house modelling site. ESI prepares hydrogeological software package RAM2 in addition risk assessments for landfill sites to other software packages. This accepting inert, non-hazardous and software is highly versatile and enables hazardous waste, in a wide and varied a flexible approach to developing risk range of locations and geological and assessment models. RAM2 provides hydrogeological environments. a robust and transparent assessment of risks using the source-pathway- A technical approach to risk receptor methodology and can assessment has been carefully incorporate a constant or declining designed; ESI works closely with source term. regulatory bodies and the industry as a whole on the development and ESI’s transient version of RAM2 application of practical risk assessment (TRAM) has been developed to methodologies. Through the production allow the assessment of a landfill’s of a robust conceptual model, based performance through time, taking into on a comprehensive desk study, the account changes to the engineering level of risk assessment appropriate containment measures that are in to the site is determined. If required place (e.g. geomembrane liners and a computer model is developed, to landfill caps).Radioactive Waste DisposalRadioactive waste material has the associated with radioactive wastepotential to generate soluble products disposal sites and radioactive wastethat may gain access to groundwater facilities, an advanced risk assessmentsystems and discharge to surface water approach is necessary. Assessmentsreceptors. Protection of groundwater use the accepted ‘source, pathway,and surface waters around radioactive receptor’ methodology; ‘source’ is thewaste disposal sites is paramount. ESI’s radioactive material, ‘pathway’ is theteam of hydrogeologists and modellers route by which contaminant migrationare able to undertake the necessary risk could potentially take place within theassessments to explore whether current made ground and natural geologicalor proposed waste disposal options are strata, and ‘receptors’ are potentiallylikely to cause environmental impacts. sensitive environmental features (e.g. groundwater or surface waters) in theIn order to understand contamination vicinity of the site.risks to groundwater and surface water
Hydrogeological Risk Assessment ReviewsEnvironmental Permits for landfill sub-water table, proximity to sensitivesites include a condition requiring receptors). ESI’s services include:operators to undertake a review ofthe hydrogeological risk assessment • The review of environmental (HRA) that was submitted with the monitoring data collected since the original application. A report, detailing last HRA reviewthe outcome of the review, must be • Assessment of data to establish anysubmitted to the Environment Agency, changes in the nature of; the as stipulated by the permit source erm, the pathways, and the tESI has extensive HRA experience and receptorsutilises a range of software tools that • Update, or reconstruction of, the HRA quickly and accurately assess the level model as requiredof work required under an HRA review,enabling operators to fulfil regulatory • Concise reporting of the outcomes requirements whilst keeping costs to a of environmental data review.minimum. Changes to conceptual site model, computer modelling, The complexity of an HRA review will conclusions of the updated HRA, depend upon the nature of the site and any appropriate amendments to (inert, non-hazardous or hazardous) the site requisite surveillance schemeand the specific site setting (e.g.Case StudiesRisk Assessment for a Proposed Landfill ESI undertook a desk study and effectively. The client also benefited detailed site investigation in order from ESI’s close consultation with to enable robust conceptualisation the Environment Agency, facilitating of the hydrogeological regime and approval of the preferred containment subsequent groundwater flow and solution for the landfill site. hydrogeological risk modelling of the landfill site. Of particular ESI provided detailed technical importance was inclusion of justification for model parameters leachate re-circulation in the model. and undertook close consultation Development of the modelled site with the Environment Agency to design in close liaison with the landfill facilitate approval of the preferred engineers enabled the necessary site containment solution effectively. performance to be achieved costAssessment for a Landfill Licence SurrenderESI was instructed to produce a assessments. The risk assessmentssurrender report for an old landfill site. were subsequently undertakenFollowing early discussions with the (the stability risk assessment wasregulator, it was decided that a number of undertaken by one of ESI’s partners)risk assessments were required before a and they concluded that the site nosurrender report could be accepted. longer posed a risk.Therefore, as part of this project a site The surrender report and associatedinvestigation was undertaken to collect surrender form were submitted to thenecessary data to inform human health, regulator who agreed with the findingscontrolled waters, gas and stability risk and the licence was surrendered.
Landfill Groundwater Monitoring Network Design andConstruction Quality AssuranceESI was commissioned to advise on undertook all drilling supervision aslocating and designing 10 groundwater per the CQA plans to British Standardmonitoring wells for an active landfill BS5930.site. The operator was unhappy withthe monitoring infrastructure around the ESI provided documentation of thesite margins. works in the form of a CQA report that was submitted to the EnvironmentFollowing agreement with the Agency. The improved monitoringEnvironment Agency, ESI also provided network is now giving satisfactoryindependent construction quality information for statutory reportingassurance (CQA) services for the to the Environment Agency allowingdrilling and installation. The drilling and the operator to ensure that Permitinstallation specifications were prepared conditions are fulfilled.by ESI prior to all site work and ESI “ESI’s expertise in soil and groundwater science and our proven track record working with a wide range of clients and liaising with regulatory authorities as required, enables us to provide bespoke services to our clients in the waste management industry. Our services include, tailoring risk assessment models to the specific requirements of the site, advising on the optimum engineering design and ensuring the most cost effective solution to the problem” Rob Sears - Technical Director LandfillESI LtdNew Zealand House160 Abbey ForegateShrewsburySY2 6FDT: +44 (0) 1743 276100E: firstname.lastname@example.orgW: www.esinternational.com