VIRIDOR WASTE MANAGEMENT LIMITED. Lostock Waste Treatment Plant. Odour Management Plan. November 2009

Transcription

1 VIRIDOR WASTE MANAGEMENT LIMITED Lostock Waste Treatment Plant

2 CONTENTS 1 Introduction Sources, releases and impacts Odour Control Measures Site Management Responsibility Physical Control Measures Management Control Measures Monitoring General Odour Contingency Measures Introduction Odour complaint investigation Elevated Odour Levels Reporting Measures Emergency Plans General Abnormal Meteorological Conditions Breakdown of Process Equipment and Plant Staffing Issues Management Responsibilities and Review Review of odour control measures...13 APPENDICES Appendix 1 Odour Report Form

3 1 Introduction This outlines the methods by which Viridor will systematically assess, reduce and prevent potentially odorous emissions from the Lostock Waste Treatment Plant (WTP). The odour management plan is a working document with the specific aim of ensuring that: odour impact is considered as part of routine inspections odour is primarily controlled at source by good operational practices, including physical and management control measures all appropriate measures are taken to prevent or, where that is not reasonably practicable, to reduce odorous emissions to air from the WTP at nearby receptors This addresses the impact of odour release and the control measures employed to mitigate the risk. These are supported through monitoring procedures to identify both elevated levels and review complaints should they arise. The complaints management procedure including the management responsibilities are also addressed The methodologies presented in this management plan take full account of Environment Agency guidance documentation as detailed below: Internal Guidance for the Regulation of Odour at Waste Management Facilities Technical Guidance Note IPPC H4, Horizontal Guidance for Odour 1

4 2 Sources, releases and impacts Odour may be released during the following activities: Unloading of waste at the site in the reception halls Storage of waste in reception halls Mechanical Separation Biodrying and refinement Storage of SRF and recyclable materials awaiting transport offsite Once released into the atmosphere, the pathway for odour will be air transport. Sensitive receptors will include humans living close to the site, in particular residential properties to the north and west of the site. The Odour and Ammonia modelling indicates that the proposed [27m] stack will give adequate dispersion to prevent odour nuisance from the site, with levels meeting 0.49ou E /m 3 (as 1 hour 98 th percentile concentrations) at the maximum modelled receptor concentration, which is well below the 1.5ou E /m 3 level that may cause a nuisance, giving an overall low risk Further detail on the risks and pathways of odour release are provided in 03 Risk Assessment. Odour and Ammonia modelling has also been undertaken and is provided as Appendix 4 to 03 Risk Assessment All potential odour sources are located within enclosed buildings. Further detail on the processes that may release odour is provided in 02 Operating Techniques. 2

5 3 Odour Control Measures Physical and management measures have been included to control odour at the WTP. These are discussed below. 3.2 Site Management Responsibility The Technically Competent Manager (TCM) (or designated responsible person) will have responsibility for ensuring that nuisances and hazards arising from the facility due to odour are minimised. Regular meetings will be instigated to discuss current and planned site operations that have the potential to generate odorous site emissions. 3.3 Physical Control Measures A comprehensive range of physical control measures will be implemented at the site. These control measures are as follows Enclosed building provided with high speed automatic roller shutter doors and air curtains on all doors will be employed All waste processing plant, including conveyors, will be enclosed units with point source air extraction technology applied at strategic locations Air extraction equipment will actively extract potentially odorous air from the waste reception hall, treatment building and enclosed waste processing plant (including conveyors). The air extraction system will induce a slight negative pressure within the relevant buildings. This negative pressure will promote the inflow of air into rather than out of the facility so that when the doors are open there is less potential for odour to leave the building Air Treatment Technology, incorporating dust filters and biofilters, will manage aerial emission prior to discharge to the atmosphere via a stack. The stack has been designed to be of sufficient height (27m) to aid dispersion to the point where emissions will not impact on any receptors Dust filters will remove particulates, including bioaerosols from collected air. Biofilters will then slow the air flow down so that any residual particles of suspended particulates are filtered out of the air. Biofilters will remove odour from the emissions through the use of an organic medium containing biological agents which aerobically digest complex molecules thus removing odour from the output air stream. 3

6 These conditions are promoted by keeping the medium moist with a humidifier/condenser. 3.4 Management Control Measures A comprehensive range of management control measures will be implemented at the site All waste unloading, loading, treatment and storage will be undertaken inside the WTP buildings All doors in the waste reception halls to be kept shut during unloading and loading operations and at all times when waste access is not required All odour control equipment as detailed in the physical control measures, including the biofilter and organic medium will be maintained to the manufacturers specifications to ensure that it operates effectively at all times. The biofilter and organic medium will be maintained to a specific maintenance programme to ensure that it is operating effectively at all times. Only one biofilter will be subjected to routine maintenance at any one time to ensure that adequate air treatment will be continuously available If at any time it is necessary to undertake temporary actions that are likely to cause elevated levels of odour, the TCM (or designated responsible person) will contact the Environment Agency and any other interested parties before such actions are taken to inform them of the operations being undertaken and that the elevated levels of odour will be of a temporary nature. Where practicable, such actions will only proceed when the prevailing wind direction is away from sensitive receptors. 4

7 4 Monitoring 4.1 General Weather conditions (including wind speed and direction) shall be visually assessed and recorded at regular intervals. This will enable potential odour issues to be predicted and necessary remedial actions implemented All operational staff will be responsible for reporting any odour problems immediately to the TCM (or designated responsible person) (or designated responsible person) Daily olfactory monitoring will be undertaken at the site boundary by operational staff The inspections shall be undertaken as follows: The operational member of staff will walk slowly along the site boundary and breathe normally. If an odour cannot be detected in this way, the inspector will periodically stand still and inhale deeply facing upwind. If odour is detected while walking and breathing normally, the intensity will be recorded as 3 (moderate odour). If odour can only be detected whilst standing still and inhaling whilst facing the wind then intensity will be recorded as 2 (faint odour). Following the identification of an odour at the site boundary, an on site inspection will be carried out to trace any odour back to source and enable any corrective or preventative action to take place Observations including time, date, weather conditions, temperature, wind strength, wind direction, intensity, odour type and sensitivity will be recorded in an Odour Report Form (Appendix 1). Site operating conditions at the time of survey will also be recorded, enabling the identification of any abnormal site operating conditions such as downtime for refurbishment or maintenance Should elevated levels of odour be identified, the TCM (or designated responsible person) will be informed immediately and will initiate the mitigation measures identified in section 5. 5

8 4.1.7 Wherever possible, odour inspectors will be chosen from office-based staff that are unlikely to suffer from adaptation to odour. Adaptation to odour process whereby a person gets used to (adapts to) an odour and so may be unable to detect an odour. All staff responsible for assessing odour will receive appropriate and adequate training from the site management on the odour inspection procedure. Each inspector carrying out odour assessments will be initially accompanied by a more experienced member of site management to ensure that the nature and offensiveness of any odours detected are being perceived similarly Staff will be instructed to avoid strong food or drinks for at least one hour beforehand and those members of staff who have a cold, sore throat or sinusitis will not be used to carry out odour assessments. 6

9 5 Odour Contingency Measures 5.1 Introduction Elevated levels of odour may be identified either by: receipt of an odour complaint from a third party suggesting that there is an odour from the WTP, detection of odour at the site boundary as a result of the monitoring procedures detailed in Section 4; or malfunction of the odour abatement system This section details the contingency measures in place to identify the source of elevated odour levels and bring odour levels back under control and minimise their impact. 5.2 Odour complaint investigation There will be a, site diary, plus forms to record complaints, which will be completed by the TCM (or designated responsible person) and input into the Issue Management System (IMS) As part of the Business Management System, a customer care and complaints procedure will be implemented. The customer care and complaints procedure applies to all complaints, feedback and requests made by third parties regarding Viridor's operational activities, environmental, health and safety performance or quality of service/product All complaints from third parties including external customers, potential customers, statutory authorities, statutory consultees, members of the general public and internal clients will be forwarded to the TCM (or designated responsible person) to action as below and recorded onto an online incident reports database within 72 hours The TCM (or designated responsible person) will ensure that: The complaint is investigated to identify the cause, if necessary this may involve direct communication with the complainant In the event of elevated levels of odour being detected, the presence of abnormal on-site activity is assessed and if necessary preventative action is taken that will prevent a reoccurrence of the same problem. These actions must be documented 7

10 The Complainant will be contacted and given information on the investigations conducted and actions taken as appropriate Where a complaint or query is likely to involve a statutory authority, the emergency services, an insurance company, or the media, the External Affairs Manager will be informed Complaints involving a location with Local Authority Contracts will be reported in line with specific Contract requirements and timescales. Local procedures may need to be in place to ensure these are adhered to All complaints are reported to Regional Directors and discussed at site meetings Details of other complaints are sent to the other Company personnel as appropriate. If the investigation indicates that the complaint has not been justified this will be clearly recorded on the Incident Report. All complaints will be logged. 5.3 Elevated Odour Levels Any elevated levels of odour identified by the monitoring programme detailed in Chapter 4 and the customer care and complaints procedure identified in section 5.1 will be mitigated as follows: The TCM (or designated responsible person) will carry out a range of checks at the identified source of the elevated levels to ensure the plant is being operated to the manufacturer s specification, to the requirements set out in Sections 3.2 and 3.3 of this management plan, and to ensure that any improvements required to minimise the odour levels are made. This may include the cleaning of all stockpiled waste either through processing or transportation directly to landfill and ensuring that waste is not stored for more than three days in the reception halls To further mitigate the elevated odour levels, the following actions shall also be considered. The site could temporarily restrict the waste types accepted at site (i.e. those with highest potential to cause odour) to see if the odour issues continue. 8

11 Alternatively the site could reduce the waste throughput or temporarily halt waste processing. As identified in 02 Operating Techniques, there are several of each piece of processing equipment, allowing the partial shutdown of the plant with continued processing. In addition to this, the feed rate can be reduced. Both of these measures will allow for a reduction in waste processing. The site has three days storage capacity in the waste reception hall which will allow a complete stop in operations If necessary the TCM (or designated responsible person) will temporarily divert waste to other delivery points that form part of the Cheshire PFI waste treatment contract or to contingent treatment points In the event of a serious incident requiring the complete shutdown of the plant for an extended period, contingent treatment points will be used to divert waste that would otherwise have been delivered to the site The TCM (or designated responsible person) will ensure a close liaison with the Environment Agency throughout all stages of the process following the emissions limit being exceeded Once the improvements identified by the TCM (or designated responsible person) have been completed, the manager will commission a further odour assessment to ensure that the improvements have addressed the source of the elevated levels. If the elevated levels are still present then the manager will repeat the request for improvements and subsequent assessments until the limits are met If operational failings are identified, the retraining of employees will take place to ensure that all employees operate to the required standards. If the failings are identified as part of the operating techniques then the problem will be raised as part of the review of control measures detailed in section Reporting Measures In the event of elevated levels of odour being identified, the event will be reported into an Issue Management System immediately by a member of operational staff. This Issue Management System is 9

12 accessed via internal company intranet, known as the portal. Upon notification of an Environmental Incident, the TCM (or designated responsible person) will complete an incident reporting form. The completed form is then distributed throughout the company All performance failures will be categorised for input into the IMS as follows; Minor event: quick fix possible, locally resolved; Medium event: brief disruption to service, Management intervention required; Major event: significant disruption to service significant disruption to service Each non-conformance category has a given deadline for rectification The IMS will record any actions taken to rectify the issue any necessary actions or review are recorded onto the Issue Management system and the person reporting the incident is notified. These reports are reviewed at national, regional and local levels, via operational, management and health and safety meetings The Compliance Manager will investigate the performance failure event within [2] hours and, if necessary, will report the event to the Environment Agency. Once the issue has been resolved, the corrective action taken will be entered onto the system and the issue will be closed. 10

13 6 Emergency Plans 6.1 General This section considers the potential for accidents (or incidents) which would result in the loss of control of odorous substances and could have an unacceptable short term impact on the local community Should an emergency occur outside of normal operating hours, a nominated representative will be on site within two hours of notification Should an emergency occur out of hours, the nominated representative will contact his operatives and managers, as appropriate, via mobile telephone. The nominated representative will identify whether the emergency services are required to attend a site emergency and will contact them directly if necessary. 6.2 Abnormal Meteorological Conditions Abnormal meteorological conditions such as low wind strength, low pressure, high temperatures may promote elevated levels of odour either on the site or at nearby sensitive receptors. A wind direction towards sensitive receptors may increase odour levels. Conversely very low wind strength and temperature inversions may minimise dispersion and potentially create a build up of odour. High temperatures may also increase emissions The mitigation measures to be undertaken in the event of abnormal meteorological conditions are the same as the contingency mitigation measures detailed in section 5.3. The Unit Emergency Plan for flood will also provide further detail on the procedures to be undertaken in the case of flooding at the site. 6.3 Breakdown of Process Equipment and Plant The breakdown of the waste treatment process or abatement equipment may cause elevated levels of odour to be created due to the build up of waste or the failure of control equipment The mitigation measures to be undertaken in the event of process breakdown are the same as the contingency mitigation measures detailed in Section

14 6.4 Staffing Issues Human error and accidents may cause elevated levels of odour to be created either through the stopping or breakdown of the process or the failure of control equipment The mitigation measures to be undertaken in the event of staffing issues are the same as the contingency mitigation measures detailed in Section 5.3. The Unit Emergency Plan for accident/injury will also provide further detail on the procedures to be undertaken in the case of an accident at the site. 12

15 7 Management Responsibilities and Review The control of odour will be managed according the Business Management System which includes Environmental Management at the site accredited to ISO It will be the responsibility of the TCM (or designated responsible person) to ensure that the Business Management System is adhered to at the site. This includes ensuring that the odour control measures detailed in Chapter 3 are adhered to The TCM (or designated responsible person) will be supported by the Compliance Manager. The Compliance Manager is responsible for monitoring, auditing and evaluation of site performance, which will include ensuring continued compliance with the ISO standard. 7.2 Review of odour control measures Odour control measures will be reviewed through internal audits as part of the monitoring and reporting of the Business Management System With reference to odour the internal audits will include but will not be limited to the following; Monthly spot check inspections of the paper trail of forms and the IMS to ensure that all data is being entered correctly. Checks to ensure that any issues entered into the IMS have been resolved correctly. Visual inspections to ensure that there is no non compliant waste getting on to site. Checks to ensure that the EWC codes are being used to ensure the identification and separation of contract and non contract waste. External Audits External Audits of the Business Management System (BMS) will be carried out in order to achieve and maintain ISO14001 accreditation. 13