Reducing Fire Risk at Sites Storing Combustible Materials
Contents
1. Reducing fire risk at sites storing combustible materials Technical Guidance Note TGN7 01 Contents 1 Introduction 2 2 Key points 3 3 What s the consequence of a fire 4 4 What s the risk of fire on your site 5 5 Preventing fires 6 6 Detecting and suppressing fires 8 7 Containing and mitigating the effect of fires 9 8 Managing stacks 10 9 Producing an accident plan 13 10 Checklists 16 11 Glossary 18 12 References 19 1 How to comply with your environmental permit reducing fire risk on sites storing combustible materials 1 Introduction In How to comply with your environmental permit http oublications environment agency gov uk pdf GEHO0812BUST E E pdf we describe the measures permitted sites must take to minimise pollution and harm to health This includes the implementation of a written management system to deliver the conditions within the permit Fully implementing a satisfactory management system provides appropriate protection for the environment and local community Part of the management system includes the accident plan This Technical Guidance Note TGN sets out what needs to be captured within that accident plan to reduce fire risk on permitted sites storing combustible materials including waste treatment and recovery facilities This guidance applies to site storing more than 50 cubic metres of solid combustible material at any one time in the absence of e arelevant sector fir2. direct contact with the ground or subsoil The saturation zone is where all the cracks in the rock and all the spaces between the grains of rock and within the soil are filled with water Penstock shut off valve A sluice or gate valve fitted in a sewer or drain that can be closed automatically or manually to contain spillages or firewater Secondary containment A structure such as a bund that surrounds a storage area designed to contain pollutants in the event of a fire or spillage Sensitive receptor Human receptors includes hospitals nursing homes schools residential areas places of work transport networks Environmental receptors include source protection zones surface waters potable abstractions groundwaters protected habitats Stack A pile of solid combustible materials Any spaces within it will not e allow free passage or e exceed one metre in width at their narrowest point Surface water drain sewer Sewer or pipes that collect uncontaminated surface water only from buildings roads and yards which usually discharges directly into rivers the sea or groundwater Spontaneous combustion Combustion which occurs without an external heat or ignition source being applied Tertiary Containment A device or structure such as a firewater lagoon that provides additional containment should secondary containment fail 12 References How to Comply with Your Environmental Permit http pu
3. at night to allow access for fire plan procedures or to minimise risk of loss in the event of fire Can any of the following affect access to and around your site Item Yes No Comments Actions prevailing wind causing smoke and fumes around rough terrain access areas and routes to your site buildings debris security fencing 10 4 Environmental considerations Item Yes No Comments Actions Do you have a drainage plan for your site Do you know which local surface waters groundwater and or sewage treatment works firewater run off will flow to and how they may be affected by firewater run off Are fire fighting water supplies adequate on your site and are suitable open water supplies available and accessible Your local FRS can help you calculate this Are the location of hydrants and their flow rates marked on your site plan even if outside the site boundaries Do you have adequate plans equipment and facilities to contain firewater option If firewater can t be contained is a controlled burn a safe Is a controlled burn also the best option for air quality and or fire fighter safety Do you know which properties and residential areas surrounding your site may be affected by smoke If the answer to the question above is yes is there a plan in place to tell people living there what to do e g keep door and windows shut 1
4. e The height should be taken as the longest measurement between the base of the stack and the top This may not be the highest point if the ground is uneven e Treat two or more stacks as one stack if o They are within an area not exceeding 235 square metres and the longest dimension doesn t exceed 20 metres 10 How to comply with your environmental permit reducing fire risk on sites storing combustible materials o The space between them doesn t meet the minimum separation distances set out Table 2 and or doesn t allow FRS vehicles to pass freely between them Table 1 Access for the FRS vehicles should be unobstructed at all times and meet as a minimum the requirement in Table 1 You should also consider how fire appliances can turn around if they have entered your site Table 1 Fire Appliance Accessibility Appliance Min Width Min Width of Min Clearance Min Weight Min Stack Access of Road m Gateway m Height m Restriction Requirements m tonnes Water Tender 3 7 3 2 3 7 12 5 4 for at least of the perimeter length High reach 3 7 3 2 4 24 4 Table 2 Maximum stack sizes and minimum separation distances Material Max height Length width Max vol Max area Min separation m m m m m Paper cardboard and rags 5 20 750 235 6 Plastic rubber and other 5 20 450 235 6 materials Fridges computers and 5 20 300 235 15 electrical equipment
5. filters e have all bucket loaders fitted with rubber strips to prevent sparks being generated when the bucket comes into contact with hard standing etc You should e consider implementing a fire watch at the end of the shift when dust from processing operations can settle onto hot exhausts engine parts and also for separation distances to be observed between plant amp material when the site is not staffed 6 How to comply with your environmental permit reducing fire risk on sites storing combustible materials consider the provision of an emergency quarantine area This must be kept available at all times for use if a hot load is imported or if a hot spot is identified in a stockpile and turning or digging out to isolate are considered suitable measures Such an area would require suitable separation distances to be maintained around it when in use and must not obstruct exit routes etc as it would be very high risk 5 1 Self Combustion Some materials can spontaneously combust under certain conditions and the risk increases when materials are stored for prolonged periods You must ensure that the following materials are not stored on site for longer than 6 months green material wood and wood products general waste including RDF and fines smaller size graded materials either stored or mixed material that has not been checked for potential hazards before stocking e g exposed metal rusts which can genera
6. fire risk on sites storing combustible materials You should consider the following factors e the effect on being able to achieve full stock rotation e protection from wind e the material used to enclose the stockpile for example metal sheets could increase the risks as they absorb heat from sunlight e stock capacity e ability to ensure segregation of materials e increased prevention from transmission of fire between stockpiles are the walls of sufficient size and what is their construction e the ability of the FRS to fight or contain the fire In general you should aim to strike a balance between allowing moisture to escape which is helpful because it stabilises the stack and enclosing the stack which is also helpful because it reduces ventilation A 3 sided covered building may provide the best compromise but it will be advisable to discuss the question with your local FRS and us 5 3 Turning of Stacks You should also consider whether to turn or not turn your stacks Turning will allow excess heat to dissipate and will reduce any local areas of high moisture but can cause a fire which is already smouldering to flare because it allows oxygen to enter the stack Regular turning of these stacks is recommended and it is imperative that site staff understand the appropriate way to manage hot spots How to detect and manage hotspots must be included in the accident plan Stacks should therefore be monitored regularly f
7. our and other responders incident response and or fines or costs through the criminal and or civil courts Your company s business reputation may suffer and your insurance costs are likely to rise Being a good neighbour is about thinking about the impact a fire may have on your neighbourhood and local community How to comply with your environmental permit reducing fire risk on sites storing combustible materials You should consider the following points to prevent or reduce the risk from a fire Section 4 Identify sites where this Assess fire risk on each site guidance should be applied What can you do to prevent Sections 5 7 reduce fire risk gt detect suppress contain mitigate minimum separation distances Section 8 gt maximum stack sizes other stack size separation site layout water supplies alternative approaches What should be included in your accident plan e What you are doing to reduce fire risk Section 9 specific actions to manage all above e Ifa fire starts what you will do before your local FRS arrive e What you will do after your local FRS arrive Use our checklist to help you prevent a fire at your site and to minimise it s impact if one starts Section 10 3 What s the consequence of a fire 3 1 Causes of fires Causes of fires on your site can include arson or vandalism self combustion e g due to chemical oxidation microbial decomposition plant or e
8. procedures 10 Checklists These checklists will help you prevent a fire at your site and minimise its impact 10 1 Material Storage Item Yes No Comments Actions Do you have combustible flammable and other hazardous materials including cylinders on your site Does your management system describe how you manage the quantity and type of material you intend to stockpile including seasonal and market variations Is the location and duration of storage appropriate Do separation distances between stacks and or other risk reduction measures on site meet requirements of your local FRS Have you consulted your local FRS about stack layout design and fire fighting strategy Have you considered fitting an automatic fire detection and suppression system 10 2 Personnel safety Item Yes No Comments Actions Does your site have suitable first aid fire fighting equipment and training for staff Are all means of escape for your staff adequate Do you have a plan in place to raise the alarm and evacuate workers 16 How to comply with your environmental permit reducing fire risk on sites storing combustible materials 10 3 Access Item Have you provided suitable access for fire fighting vehicles Yes No Comments Actions Have you assessed potential fire spread on and around your site Have you considered where best to park up machinery
9. your site and if one starts the rate at which it spreads Whilst you must do all that is reasonable to prevent a fire you can t eliminate all risks So you must develop and implement an accident plan as required by your permit to not only prescribe steps you re taking to prevent a fire but also how you manage your site to allow the fire to be tackled quickly effectively and safely Although you are responsible for producing the accident plan for your site liaison with your local FRS is recommended as it will assist the FRS with managing the risk in their area enabling them to respond more effectively should a fire occur 9 1 Content of your plan The effectiveness of your accident plan will depend on how well you train your staff All staff and contractors working on site must be aware of the fire response plan and what they must do during a fire Your plan should be available electronically and in hard copy Give careful thought to where the accident plan is located To ensure access under all circumstances you must have a copy in more than one place Ensure that the locations of the plan are known to all staff You should have regular exercises to test how well your plan works and that staff understand what to do Your plan must include e communication arrangements e g named contacts key holders with their telephone numbers e names types quantities and properties of combustible and other hazardous materials on your site e
10. 7 How to comply with your environmental permit reducing fire risk on sites storing combustible materials Item Yes No Comments Actions Do you have a plan to dispose of firewater and other wastes Have you consulted us for advice on environmental risks 11 Glossary Accident Plan Part of a written management system that includes an assessment of fire risk on the site and what measures are in place to prevent detect suppress mitigate and contain fire Bund A type of secondary containment see below Usually an impermeable construction designed to hold polluting substances that leak are spilt or run off from a storage area Combustible materials In the context of this document solid materials that can ignite and burn e g textiles and paper Controlled burn An operational fire fighting strategy where the application of fire fighting media such as water or foam is restricted or avoided to minimise damage to public health and the environment Exemption Low risk waste handling operations that don t require a permit or licence Most exemptions need to be registered with us before the start of operations Protected habitat Examples include Site of Special Scientific Interest SSSI Area of Special Scientific Interest ASSI Special Area of Conservation SAC Special Protected Area SPA National Nature Reserve Sites of international conse
11. RDF use as for plastics 5 20 450 235 6 above Wood 10 20 1370 235 6 You should apply a spacing of 20 metres between groups of 16 stacks Stacks consisting of a mixture of combustible materials should be considered case by case during your risk assessment Your assessment should take account of the proportion of the materials the form the materials are stored in and the likely characteristics of any fire involving it This means you can ensure you use appropriate separation distances stacks sizes and or alternative risk reduction strategies If you need more advice contact the Fire Safety Department of your local FRS and or us 8 1 Layout of stacks on your site Once you ve identified the separation distance required between stacks and taken account of the access requirement for FRS vehicles and the location of heat sources buildings and other vulnerable areas on site you can plan the storage arrangements Other issues to consider when doing so are the prevailing wind where fire water will flow and the fire fighting strategy that will be used An example of good practice is shown in Figure 1 11 How to comply with your environmental permit reducing fire risk on sites storing combustible materials Figure 1 Example of Good Stack Storage Small stacks should be treated as one stack if Minimum separation distances between separation isn t sufficient The total quantity should individual stacks and o
12. blications environment agency gov uk pdf GEHO0812BUST E E pdf All the Pollution Prevention Guidance notes PPGs are available at www environment agency gov uk ppg http www doeni gov uk niea index publications htm act l amp typ s amp ftx www sepa org uk about_us publications guidance ppgs aspx Regulatory Reform Fire Safety Order 2005 http www opsi gov uk si si2005 20051541 htm Controlled burn PPG 28 Spontaneous heating of piled tyre shred and rubber crumb HSE http www hse gov uk rubber spontaneous htm 4 SFPE Handbook 3 Edition Ch 2 Conduction of heat in solids National Fire Protection Association SBN 0877654514 Managing Fire Water and Major Spillages PPG18 CIRIA Report 164 1997 P A Mason H J Amies P R Edwards G Rose G Sangarapillai Design of containment systems for the prevention of water pollution from industrial incidents ISBN 0 86017 476 X http www ciria org SERVICE Home core orders product aspx catid 2 amp prodid 301 Incident Response Planning PPG 21 Fire and Rescue Service Manual Volume 2 Fire Service Operations Environmental Protection The Stationery Office ISBN 978 0 11 341316 4 http www communities gov uk publications fire environmentprotectvol2 19 How to comply with your environmental permit reducing fire risk on sites storing combustible materials Other useful sources of information Pollution Prevention Pays http www environment agency gov uk busines
13. e code of practice recognised by us and or another appropriate professional regulatory body e an accident plan which has been assessed and agreed with your local Fire and Rescue Service If you don t follow this guidance or appropriate sector specific guidance you should be able to justify why not and show that the site specific measures you ve taken instead are equivalent or superior If your permit does not have a condition requiring a written management system you should still follow this guidance If you don t we may take appropriate action for example varying your permit This TGN supplements but doesn t replace any statutory requirements for sites controlled under Local Acts of Parliament the Regulatory Reform Fire Safety Order 2005 or other applicable legislation This guidance describes how to e assess the risks posed from fires involving combustible materials in stacks and piles e identify sites where this guidance should be applied e identify the measures that should be included in your accident plan and implemented at all times to reduce the risk of fire and fire spread e produce an accident plan which you can share with your local Fire and Rescue Service FRS e store combustible waste with appropriate stack sizes and separation distances e determine appropriate fire fighting strategies and ways to minimise impacts of a fire on people property and the environment It applies to all combustible materials includi
14. ems may not be effective at tackling a deep seated fire If your fire risk assessment indicates such fires are a possibility you should concentrate on installing systems that detect fire as quickly as possible and restrict fire spread for example the use of water curtains The list of systems above isn t exhaustive and alternatives may be available Seek advice on the appropriate system for your site from your insurer the FRS and trade association representing approved installers of fire detection and suppression systems On the largest sites and especially on sites where reprocessing or power generation also takes place consideration should be given to the provision of a private fire hydrant system with the necessary supply of water 7 Containing and mitigating the effect of fires You must e have all appropriate measures in place that limit its size duration and impact of the fire e appropriately locate all stacks stockpiles e ensure stacks are appropriately sized and separated e appropriately store materials within buildings and maintain separation distances from flammable or combustible materials on site e g gas cylinders aerosols and fuel tanks e apply appropriate separation distances from the stack s to a site boundary and roadway e ensure storage quantities are managed to a minimum and throughput is maximised to keep stack sizes below the recommended sizes e include a fire fighting strategy within the accident plan This
15. fy the facilities and equipment you need for your site If you make an uncontrolled discharge to the water environment you may be committing an offence unless e you have a permit to do so and e the discharge meets the conditions of that permit 7 1 Seasonality Where materials are stored for export particularly RDF SRF then a contract for these materials must be in place before stockpiling them such that they are stored on site for no longer than 6 months If the wastes on your site are subject to seasonal variation in demand and or supply it is important that you manage these variations You must include details of how much waste you can manage on you site at any one time and how you will do this within your management system The same principles apply when variations in the market lead to a build up of stock levels All of these issues and the contingencies you are going to employ to minimise the fire risk must be written into your management system and implemented before operations on site commence 8 Managing stacks You must e manage all stacks to below the maximum sizes and separation distances given in Table 2 e have adequate water supplies available at all times to fight a fire e enable easy access for FRS vehicles around the whole site e manage all stacks of materials that can spontaneously combust to ensure that they are less than 3 metres high When calculating stack separation distances you must apply these rules
16. gation http www buncefieldinvestigation gov uk index htm Communities and Local Government England and Wales https www gov uk government organisations department for communities and local government Construction Industry Research and Information Association www ciria org uk https www gov uk government organisations department for business innovation skills Department of Business Innovation and Skills Department for Environment Food and Rural Affairs https www gov uk government organisations department for environment food rural affairs The National Chemical Emergency Centre www the ncec com The Stationery Office www tsoshop co uk UK Resilience Improving the UK s ability to absorb respond to and recover from emergencies https www gov uk government policies improving the uks ability to absorb respond to and recover from emergencies 20 How to comply with your environmental permit reducing fire risk on sites storing combustible materials We welcome any questions or comments about this guidance or suggestions about how we could improve it Please email us at pollution prevention environment agency gov uk or phone us on 08708 506 506 or write to us at Environment Agency 99 Parkway Avenue Sheffield S9 4WG 21 How to comply with your environmental permit reducing fire risk on sites storing combustible materials
17. may include controlled burn Section12 reference 2 e use an impermeable fire resistant surface for the base of the stack e Install secondary and tertiary containment facilities for firewater run off such as bunds storage lagoons shut off valves penstocks isolation tanks modified areas of your site e g car park block drains and or divert firewater using pollution control equipment such as firewater booms and drain mats 000000 9 How to comply with your environmental permit reducing fire risk on sites storing combustible materials For each of the above the appropriate measures and recommended sizes are found in_Section 8 Table 2 You should e Alternatively you should employ firewalls between stacks If you do these will need to be high and thick enough to stop fire spread from heat radiation The Society of Fire Engineers Handbook 3 edition Section12 reference 4 explains how to do this e Alternatively you should place combustible materials in shipping containers These should be stacked no more than two containers high secured with a lock and allow FRS vehicles unobstructed access around them at all times The containment facilities and pollution equipment you need will depend on the size of your site the amount of material you store and the fire fighting strategy Managing fire water and major spillages PPG 18 Section 12 reference 5 and CIRIA 164 Section 12 reference 6 will help you identi
18. ncluding schools hospitals major transport infrastructure others businesses shops residential areas rivers canals and protected habitats are within 1km of your site e the type and quantity of materials you store e what would happen to these materials in a fire e the potential causes and likelihood of fire e your water supplies and fire fighting options including a controlled burn e environmental pathways e the presence or absence of firewater containment facilities e prevailing wind direction and measures you have taken to counter it e g bunds and wind breaks pollution other than in relation to a water discharge activity or groundwater activity means any emission as a result of human activity which may a be harmful to human health or the quality of the environment b cause offence to a human sense c result in damage to material property or d impair or interfere with amenities or other legitimate uses of the environment 5 How to comply with your environmental permit reducing fire risk on sites storing combustible materials How to Comply with your environmental permit has more information on conducting a risk assessment Controlled Burn PPG28 Section12 reference 2 gives advice on how to assess the risk and applies to all sites not just those where a controlled burn is relevant Where your assessment indicates that fire is a risk to sensitive receptors within 1km of your site then
19. ng but not limited to e paper or cardboard e plastics e rubber natural or synthetic including whole tyres baled tyres tyre shred crumb and fibre e wood whether or not scrap or cut into planks boards logs firewood or chips or joined to form crates pallets casks or barrels fragmentiser waste from vehicle dismantling e rags e Refuse Derived Fuel RDF and Solid Derived Fuel SRF 2 How to comply with your environmental permit reducing fire risk on sites storing combustible materials e waste electrical and electronic equipment such as fridges computers and televisions containing combustible materials such as plastic You should also take action to reduce the risk from stacks of combustible materials enclosed by any buildings on your site Much of the guidance in this document will be relevant to enclosed stacks but due to differences in the type size and construction of buildings that could be used to store combustible materials you should additionally seek and follow the advice of your local FRS In England and Wales you must also comply with the Regulatory Reform Fire Safety Order 2005 RRO Section12 reference 1 This guidance does not apply to landfill sites or to the storage of e compost animal manures and bedding flammable materials combustible liquids dangerous substances stored under the Control of Major Accident Hazards COMAH Regulations For the other materials and activities not listed ab
20. ngements during and outside normal working hours as described below You should also consider reducing the amount of firewater run off generated use sprays and fogs rather than jets recycling firewater if it s not hazardous and it s possible to reuse instigating a controlled burn Section 12 reference 2 gives further guidance The final decision to do this will rest with the FRS s Incident Commander applying cooling water to unburnt material and other hazards taking care to prevent this water causing or adding to water pollution and or increasing air pollution separating unburned material from the fire using heavy plant separating burning material from the fire and quench it with hoses or in pools or tanks of water This has the advantage of reducing the amount of firewater produced burying the fire using soil sand crushed brick and or gravel This may be appropriate if there are limited water supplies and smoke is threatening local people but it can only be used when o groundwater vulnerability is low o you ve consulted us about this option beforehand o contaminated material is removed and legally disposed of as soon as it s safe to do so To decide which of these options or combinations of options is appropriate you should take account of the 14 scale and nature of the environmental hazards on the site and the activities that take place on it risks posed to people the environment and property How t
21. number of people working on site staff and contractors including any differences between weekdays weekends and times of the day e number and types of heavy plant and machinery and operators on site to assist with initial fire breaks e likely burn times of the material e procedures for the disposal of firewater and any other waste arising during a fire 13 How to comply with your environmental permit reducing fire risk on sites storing combustible materials a site plan showing o layout of buildings o any areas where hazardous materials are stored on site location of gas cylinders process areas chemicals stacks of combustible materials oil and fuel tanks o main access routes for fire engines and any alternative accesses o access points around the site perimeter to assist fire fighting o hydrants and water supplies o any watercourse borehole or well located within or near the site o areas of natural and unmade ground o the location of plant protective clothing and pollution control equipment and materials o drainage systems including foul and surface water drains and their direction of flow and outfall points o the location of drain covers and any pollution control features such as drain closure valves penstocks and firewater containment systems the procedures your staff should follow if a fire starts This must cover the period before the FRS arrives and until recovery has been completed including arra
22. o comply with your environmental permit reducing fire risk on sites storing combustible materials e type of materials you store on site the form they re stored in and the length of time needed to extinguish a fire involving them e availability of firewater containment facilities e local topography and different weather conditions and fire scenarios that could be reasonably expected at the site The most appropriate option should be chosen as part of an agreed fire safety plan for the site guided by a full risk assessment This approach may need to be modified during an incident for example due to changes in weather based on a dynamic risk assessment by the FRS The agreed strategy must be incorporated into the accident plan for your site Our incident response planning guidance PPG 21 Section12 reference 7 and our guidance How to comply with your environmental permit Section 12 will also help you understand what needs to be included in the accident plan We recommend the information in your accident plan is also included in the emergency responder s own response plan for your site for example FRS Risk Information Plans Section12 reference 8 9 2 Actions to take when a fire is suspected or detected e call the FRS immediately using 999 Before the FRS arrives you must e raise the alarm initiate evacuation of people on site and ensure all staff and visitors are accounted for e attack the fire if it
23. or temperature build up The longer any stack of materials that can self combust is left the more prone it is to self combustion and therefore the more closely it should be monitored The document on spontaneous heating of piled tyre shred and rubber crumb Section12 reference 3 provides further advice on how you can control the risk of spontaneous combustion Although written for the operators of tyre recovery facilities much of the guidance is applicable to the storage and treatment of other materials that can also self combust 6 Detecting and suppressing fires If a fire starts the quicker it s detected and tackled the better You must e provide portable extinguishers e carry out regular inspections You should consider fitting e automatic detection systems such as o smoke and heat detectors including temperature probes 8 How to comply with your environmental permit reducing fire risk on sites storing combustible materials o spark infrared and ultraviolet detection o cctv visual flame detection systems e fire suppression systems such as o sprinklers o water spray deluge systems o water curtains o fixed monitors high and low level These systems will usually keep a fire under control and may extinguish the fire quickly and safely This will mean less damage to your site and the environment The system s you choose should depend on your site s risks For example some fire suppression syst
24. ove please contact the Health and Safety Executive HSE your local FRS or us for advice 2 Key Points Fires involving combustible materials can cause significant harm to people and the environment i e e combustion products even those from non toxic materials release airborne pollutants which can cause both short and long term effects on human health and the environment e firewater run off can transport pollutants into drainage systems rivers and lakes groundwater and soil threatening water supplies public health wildlife and recreational use e thermal radiation harms people and the environment and can lead to fire spread e hazardous waste will be created by the fire and the impacts of fire fighting e explosions and projectiles can harm people and spread the fire to unaffected areas e fire can threaten life and cause property damage The impact of a fire may be both immediate and long lasting and can present a significant burden for the FRS other agencies and the public including the risk of death and harm to public health Dealing with a waste fire is likely to involve a large number of fire appliances and fire fighters which are funded by the tax payer If you re the polluter you are likely to be responsible for the costs of any clean up This can be expensive as in many cases the solid remains of combustion products and partially burnt material is classified as hazardous waste There may be other costs associated with
25. quipment failure electrical faults naked lights discarded smoking materials hot works e g welding cutting industrial heaters hot exhausts open burning on site or nearby damaged exposed electrical cables reactions between incompatible materials neighbouring site activities sparks from loading buckets hot loads deposited at the site 4 How to comply with your environmental permit reducing fire risk on sites storing combustible materials 3 2 Fire characteristics The type of combustible materials on your site and how they re stored will influence the size intensity and duration of any fire Fires in large stacks particularly those made up of finely divided materials can be particularly difficult to extinguish Direct application of water with or without fire fighting additives such as foam to burning stacks of these materials is often ineffective and may generate large volumes of polluted firewater and or more smoke Stacks of these materials can burn for many weeks or months with significant impact on local communities 4 What s the risk of fire on your site If you store combustible materials on your site the three components below need to be present for your site to pose a risk to people and or environment source pathway receptor You must review or produce a risk assessment and ensure that it considers e the location of your site e which and how many sensitive receptors i
26. rvation importance Ramsar site Area of Outstanding Natural Beauty AONB National Scenic Area Hazardous substances Materials that can harm human health and or damage the environment Hazardous Waste Wastes specified in the European Waste Catalogue that may be harmful to human health or the environment Permit A document issued by your environmental regulator that controls the environmental impact of your business activities It has conditions which you must follow to prevent your business harming the environment or human health Firewater run off Water that has been used to fight a fire likely to be contaminated with the products of combustion and unburnt materials that are washed off the site Flammable material Materials that ignite easily and burn rapidly with a flame Liquids and articles are usually defined as flammable if they possess a flash point of 60 C or lower Flashpoint The lowest temperature at which a liquid produces enough vapour to form an ignitable mixture in air Foul sewer Sewers or pipes that collect foul water sewage and trade effluent and convey it to a sewage treatment facility They can be owned privately or by the local sewage treatment provider Groundwater Water that is below the surface of the ground in the saturation zone and in 18 How to comply with your environmental permit reducing fire risk on sites storing combustible materials
27. s safe to do so using equipment on site e g an extinguisher or fire hose e ensure operators of appropriate machinery are standing by in a safe location to help create fire breaks under the direction of the FRS when they arrive e appoint a clearly identified person to liaise with the emergency services on site They should identify themselves to the FRS as soon as the FRS arrive on site e ensure access routes are clear e use pollution control equipment to block drains and or divert firewater to a containment area and or operate any pollution control facilities such as drain closure valves or penstocks where safe to do so 9 3 When the FRS arrives On arrival the FRS should be met by the identified responsible person who must provide them with a copy of your accident plan and update them with relevant information that will assist them in dealing with a fire more effectively 15 How to comply with your environmental permit reducing fire risk on sites storing combustible materials 9 4 Recovery When the fire has been successfully dealt with you must e remove burnt material using appropriate and lawful disposal e safely re commission plant e investigate the cause of the fire to ensure it does not recur e review and improve your accident plan and management system documents e review any training requirements for site personnel e assess what further fire reduction measures are required and implement any new measures and
28. s topics pollution 32252 aspx COMAH CA Delivery Guides under the Strategic Topic Delivery Guide heading Especially secondary and tertiary containment emergency planning http www hse gov uk comah ca guides htm Fire and Rescue Service Act 2004 http www legislation gov uk ukpga 2004 21 contents Fire Safety Risk Assessment Factories and Warehouses https www gov uk government publications fire safety risk assessment factories and warehouses HSE guidance Emergency response and spill control http www hse gov uk comah sragtech techmeasspill htm HSE guidance HS G 191 Emergency Planning for Major Accidents Control of Major Accident Hazards Regulation 1999 http Awww hse gov uk pubns books hsg191 htm HSE guidance HS G 51 Storage of flammable liquids in containers http www hse gov uk pubns books hsg51 htm HSE guidance HS G 71 Chemical warehousing The storage of packaged dangerous substances http www hse gov uk pubns books hsg71 htm HSG140 Safe use and handling of flammable liquids ISBN 978 0 7176 0967 3 http www hse gov uk pubns books hsg140 htm The Greater Manchester Act 1981 http www legislation gov uk ukla 1981 9 contents enacted Waste Framework Directive 2008 98 EC http ec europa eu environment waste framework index htm Waste Management The Duty of Care A Code of Practice http archive defra gov uk environment waste controls documents waste man duty code pdf Useful websites Buncefield Investi
29. te heat or treated materials aren t cooled enough before storage treatment process can generate heat particularly if blades are blunt larger than recommended stacks are employed You can prevent spontaneous combustion if you focus on separation isolation restricting storage times and keeping materials as cool as possible You must use a clear recording method to show how long all materials have been on site and ensure you have robust waste acceptance procedures that prevent unauthorised waste being accepted Where appropriate you should reduce risk factors e g exposed metal content proportion of fines mixing of materials heat generated during treatment minimise stack size wherever possible a number of small stacks are safer than one big one control moisture levels manage stock levels to prevent piles being left for long periods use older materials first keep material in its largest form prior to processing for its end market monitor sub surface temperature with a thermal lance Ensure you understand how to deal with hot spots and consider regular turning of piles at risk of spontaneous heating for example older piles minimise external heating e g shade from direct sunshine 5 2 Enclosing Stacks You may wish to consider enclosing your stock piles This is not a straightforward decision as there are advantages and disadvantages with each approach How to comply with your environmental permit reducing
30. ther features on not exceed maximum stack sizes agreed with your your site should be agreed with your local local FRS or the sizes in Table 2 FRS or the distances in Table 2 p Table 2 gt gt Stacks positioned diagonally opposite table 2 each other so they don t directly face 6 6 ee each other will reduce the intensity of m S gt radiated heat between multiple stack a piles This may reduce the spread of fire table 2 Road table 2 6m table 2 Building furnace compressed flammable gas etc See Table 1 for fire appliance access requirements 12 How to comply with your environmental permit reducing fire risk on sites storing combustible materials 8 2 Water supplies Fire fighting a 300 cubic metre stack of combustible material will normally require a water supply of at least 2 000 litres a minute for a minimum of three hours Where appropriate fire suppression systems are in place and or alternative fire fighting strategies such as controlled burn have been agreed with the FRS this requirement maybe reduced You should check you have adequate supplies when you carry out your fire risk assessment If you have any questions consult your local FRS On larger sites the provision of a private fire hydrant system with the necessary supply of water maybe required 9 Producing an accident plan If you follow the guidance above you ll reduce the risk of a fire at
31. you must work with your local FRS and us to reduce the risk and consequences to an acceptable level There are three main ways to do this preventing e detecting and suppressing containing and mitigating These are described further in the next sections 5 Preventing fires Ensuring everything possible is done to prevent fires is the most important part of the accident plan You must e control sources of ignition such as heating pipes naked flames light bulbs space heaters furnaces incinerators o keep these at least 6 meters away from stacks of combustible and flammable materials o reinforce the message using signs e ensure staff and any contractors follow safe working practice when undertaking hot working such as welding and cutting e ensure all visitors are aware of the correct safety and fire prevention procedures to follow whilst on site e apply a no smoking policy or ensure designated smoking areas are situated away from combustible materials e introduce a regular maintenance and inspection programme for all site areas including site machinery and ensure good house keeping e g keeping levels of dust fibre and paper in buildings and around the site to a minimum e put site security measures in place such as security fencing intruder alarms and CCTV to prevent arson Your arrangements should cover both the working day and outside normal hours e have all site vehicles fitted with fire extinguishers and dust
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