enitial odour assessment case study

The Challenge

enitial has been working with Viridor  to undertake odour assessments in order to meet regulatory requirements and to help identify and mitigate any potential adverse effects that may arise from their operations.

Additional odour management services are offered at four IVC facilities in relation to the maintenance and functional testing of biofilter systems to abate odorous emissions.

Biofilter abatement systems are notoriously hard to optimise due to variations in their input flow rates, exhaust gas retention times, temperature, moisture and pH.  Monitoring and maintenance of all these parameters needs to be undertaken regularly and effectively if the biofilter is to operate efficiently. Electrical and electronic parts (interface communications to the control unit, cables and electric panels), structural components (fans, valves, designs of ducting systems and biofilter units, feeding systems and irrigations systems) also need to be kept in good operating condition.

The Solution

enitial works with Viridor in addressing the three key requirements – odour monitoring, biofilter maintenance and functional testing of biofilter systems.

Viridor assessed the waste materials being processed at each facility to identify their potential odour characteristics. Once this had been determined, a systematic monitoring plan was developed. The information gathered shows trends over a period of time caused by changes in the type of materials, process conditions and weather conditions, including seasonal changes.

enitial employs a team of field specialists and experienced professionals to schedule, manage and deliver environmental sampling services and carry out data reporting. This also includes the coordination of laboratory service providers and liaison with land owners.

enitial’s monitoring and engineering divisions have developed a service to assess, maintain and optimise the efficiency of biofilter systems. This includes assessing the biofilter, the efficiency of the dosing and water systems, testing emissions and measuring odours as well as testing, repairing and replacing other components such as temperature probes, water pumps, air fans, control panels and flow measurement devices. Each component is taken into consideration and the whole system is stripped down into sections to investigate possible faults. Environmental measurements such as odour concentrations are recorded before, during and at the end of the work to ensure that the optimisation of the biofilter system is effective.


enitial maps surface emissions

The Challenge

It’s vital that landfill site operators monitor emissions of gas from their sites to rectify any potential issues. Otherwise, they may breach permit conditions set by the Environment Agency (EA) and generate complaints from members of the public which may result in prosecution and hefty fines.

The Solution

Environmental monitoring specialist enitial conducts detailed surface emissions mapping surveys of landfill sites to identify any sources of gas (usually methane) so that site owners can take corrective action.

Using topographical information about the site, enitial develops the scope of the survey area and the route of the field technician which is navigable via GPS on a PDA device. Its surface emissions specialists can be on site within a few days of the client’s initial contact to commence the survey after the necessary preparation work had been completed.

enitial’s technicians use the latest TDL500 Laser Diode Methane Detector to take readings from the site’s surface, gas and leachate collection system infrastructure as well as open tipping areas in the case of landfill sites. The
ATEX certified detector is extremely sensitive and can measure methane levels accurately to one part per million. The technician covers the site methodically along a grid provided by the PDA’s inbuilt GPS (typically a 10 metre grid) at certain intervals (usually three to four seconds). The figures are stored on an enidata PDA, a handheld based electronic data collection device and management system, developed by enitial to replace paper-based data recording and improve the efficiency of environmental monitoring.

Once the survey is completed, the data is exported, processed and plotted onto the site’s topographical survey to provide the client with visual representation of the methane concentrations across the site. Hot spots of gas and problem areas can be easily identified on the site survey and located accurately via GPS.

Infrastructure and aftercare management of former landfill sites


Environmental monitoring specialist enitial was appointed by Amec, a multinational engineering company, to help achieve the definitive closure of its former landfill site (Rye Loaf in West Yorkshire). The experts at enitial applied their technical expertise to provide a cost effective solution, manage the project efficiently and achieve the desired result ahead of schedule.

The challenge

The amount of waste going to landfill may have decreased in recent years, but there are still many active and closed landfill sites in the UK which need to be managed. It is thought that it can take more than 50 years for a site to achieve the completion criteria specified within environmental permits from the Environment Agency (EA) once it stops receiving waste. Managing these closed landfill sites is clearly a long term responsibility.

enitial was commissioned by Amec to carry out an infrastructure audit at the closed landfill site in Bingley, recommend improvements and implement them where necessary with the overall aim of transferring responsibility for Rye Loaf to the EA. This also included ongoing maintenance and routine monitoring in compliance with the site’s permit from the EA.

An experienced project management partner was required to oversee a structured programme of works because a number of components within the project are mutually dependent as well as ensuring it was completed on time and within budget. This work is beyond Amec’s core business which is why the company approached enitial, a specialist, to deliver and manage the entire project.

The solution

The experts at enitial conducted an infrastructure audit to comprehensively review the site including the existing monitoring points, access and services as well as highlighting any health and safety issues. enitial presented its recommendations to Amec and, following review meetings, was commissioned to undertake a comprehensive programme of upgrades and improvements to the site and its facilities.

This included environmental monitoring, civil and electrical engineering, groundworks, health and safety upgrades and the installation of sophisticated remote online monitoring systems as well as liaising with key stakeholders and statutory regulators.

enitial used its extensive technical expertise and
resources to execute the project as well as outsourcing some work to external companies such as specialist equipment, plant and service providers including electrical and civil engineering contractors.

The complex allocation of resources was supervised by enitial’s experienced project managers to deliver the infrastructure project before the deadline and within budget for Amec.

Supporting FCC Environment monitoring activities


Environmental monitoring specialist enitial has delivered a number of supplementary monitoring projects for leading recycling and waste management company FCC Environment’s landfill sites since 2012. enitial also helped FCC Environment train its new technicians when the company created an environmental monitoring team after outsourcing this work for many years

The challenge

enitial provides a considerable range of additional monitoring services and consultancy work to FCC Environment at over 70 of its landfill sites including the following:

    • Perimeter gas monitoring
    • Groundwater monitoring
    • Surface water monitoring
    • Leachate monitoring
    • Occupational and environmental bioaerosol monitoring
    • Phase 1 and 2 surface emissions surveys
    • Emissions surveys using Best Available Technology TDL500 monitors
    • Annual site reviews
    • Landfill gas pumping trials
    • Landfill gas and leachate control system installations and subsequent servicingThe array and volume of work carried out by enitial has generated more than 50 contacts at FCC Environment with their own priorities, responsibilities and enquiries.

The solution

A dedicated account manager at enitial acts as the single point of contact to respond quickly to any enquiries from FCC Environment and ensure the efficient delivery of projects as specified. Each account manager at enitial is experienced in environmental monitoring and managing both closed and operational landfill sites, enabling them to provide technical support for FCC Environment.

The geographic spread of enitial’s technicians ensures that FCC Environment receives an extremely competitive monitoring day rate for any site in the UK as well as accurate and reliable data. enitial’s data analysts submit high quality data within set timescales to help FCC Environment satisfy the terms of its environmental permits.

FCC Environment can call upon the technical support and expertise of enitial when its team of environment managers requires cost-effective supplementary monitoring and consultancy work. enitial’s account managers ensure that projects are completed on time and to a high standard, ensuring that FCC Environment’s landfill sites remain compliant with standards set by the Environment Agency.

Viridor’s environmental monitoring


Environmental monitoring in the waste management and recycling industry has been a paper-based process for a long time. The demand to capture data digitally has been growing but it’s only recently that monitoring using mobile technology has become both practical and affordable.

In addition, waste management and environmental companies require faster and more accurate methods of collecting field data to comply with environmental

The challenge

Viridor operates over 320 facilities across the UK including 39 landfill sites which require intensive environmental monitoring. In accordance with environmental permits from the Environment Agency (EA), the company routinely monitors a number of factors at its facilities. This includes the quantitative measurement of the level and quality of groundwater, surface water and leachate as well as surface emissions (such as hydrocarbons and hydrogen sulphide). In addition, the external environment beyond the boundary of the sites is measured qualitatively which includes litter, noise, odour, flies and dust.

Regulations as well as save time, money and minimise errors.

Environmental monitoring specialist enitial has worked with Viridor, one of the UK’s leading resource management and recycling companies, to implement a digital field data collection system called enidata to improve the accuracy of recordings at its facilities.

Within the industry, such data used to be manually recorded
in a notebook and transferred to a spreadsheet at a later
stage. This can result in transcription errors which meant
either erroneous readings were supplied to the Environment Agency or they had to be taken again. Viridor was keen to develop new methods of data collection to reduce transcription errors and introduce real-time data validation in the field in order improve the quality and efficiency of its environmental data. This solution has been transferred from landfill monitoring across Viridor’s portfolio of hard build infrastructure including anaerobic digestion plants and In-Vessel Composting facilities.

The solution

enitial worked with Viridor to develop enidata, a PDA-based electronic data capture device with modules for monitoring groundwater, surface water, leachate, surface emissions and the impact of its facilities.

The unique and user-friendly PDA-based data collection system, can record a number of variables such as water levels, temperature, pH and electrical conductivity as well as logging additional comments if boreholes at its landfill sites are blocked or need repairs. There are also a variety of modules to support field infrastructure audits and site inspections.

contaminated land

The challenge

Contaminated land is used to describe land polluted by heavy metals, chemical and radioactive substances, oils, tars, gases and asbestos which could cause significant harm to people or protected species and/or significant pollution of surface waters or groundwater. This definition of contaminated land refers to contamination caused by past uses of sites such as former factories, mines, steelworks, refineries and landfills.

The solution

Environmental monitoring specialist enitial is experienced in environmental monitoring and sampling of contaminated land and has a national network of geo-environmental field technicians. enitial commonly supports site investigations, remediation strategies and ongoing environmental assessments in addition to the following services:
• Groundwater level monitoring
• Groundwater sampling using inertial, peristaltic, electric, pneumatic or bladder pumps
• Non-aqueous phase liquids (NAPL) monitoring and sampling
• Water quality analysis using single or multi-parameter analysers and flow through cells
• Aquifer tests including, rising and falling head and slug tests
• Data loggers for continuous and long-term trend analysis
• Ground gas monitoring and analysis using the latest monitors and canister equipment
• Volatile organic compounds (VOC) testing
• Internal space and surface emissions testing
enitial’s in-house team of account managers and analysts provide an unrivalled data management service with results supplied within 48 hours. In addition, the monitoring specialists pride themselves on adding value by understanding their client’s objectives and making sure they are not only met, but exceeded.