FIRE WATER RISK ASSESSMENT BELVIEW PORT …apex in each building is 16.95m above ground level....

Data\17\138_14-Bellview Port\ Firewater Risk Assessment November 2017 (CMG)

FIRE WATER RISK ASSESSMENT

BELVIEW PORT

COUNTY KILKENNY

Prepared For: -

Glanway Ltd Belview Port,

County Kilkenny

Prepared By: -

O’ Callaghan Moran & Associates, Unit 15,

Melbourne Business Park, Model Farm Road,

Cork. T12 WR89

November 2017

Unit 15

Melbourne Business Park

Model Farm Road

Cork

E:[email protected]

www.ocallaghanmoran.com

T: 021 434 5366

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http://www.ocallaghanmoran.com/


Project Fire Water Risk Assessment.

Client Glanway Limited

Report No Date Status Prepared By Reviewed By 171381404 11/10/2017 Draft Initial

Client Review Neil Sandes BSc

Jim O’Callaghan MSc, CEnv, MCIWM, IEMA

4/12/2017 Final

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TABLE OF CONTENTS

PAGE

1. INTRODUCTION ......................................................................................................... 1

2. FACILITY OVERVIEW .................................................................................................. 2

2.1 SITE LAYOUT ............................................................................................................................................. 2 2.2 WASTE ACTIVITIES .................................................................................................................................... 2 2.3 SITE SECURITY ......................................................................................................................................... 3 2.4 SERVICES .................................................................................................................................................. 3 2.5 SAFETY AND HAZARD CONTROL ............................................................................................................. 3 2.6 ENVIRONMENTAL SENSITIVITY ................................................................................................................. 3

3. OPERATIONAL AREA .................................................................................................. 5

3.1 RDF MANUFACTURE (BUILDINGS 5 AND 6) .............................................................................................. 5 3.2 APCR PROCESSING (BUILDING 7 AND ANNEX) ......................................................................................... 5 3.3 STORAGE & EXPORT OF NON-HAZARDOUS WASTE (BUILDING 4) ............................................................ 6 3.4 INVENTORY OF RAW MATERIALS AND WASTES ........................................................................................ 6 3.5 PLANT AND EQUIPMENT ............................................................................................................................ 7

4. FIRE CHARACTERISTICS OF MATERIALS ON-SITE ......................................................... 8

4.1 MATERIALS CLASSIFICATION .................................................................................................................... 8

5. FIRE SAFETY MANAGEMENT SYSTEM ......................................................................... 9

5.1 FIRE FIGHTING MANAGEMENT SYSTEM .................................................................................................... 9 5.2 FIRE PREVENTION MEASURES ................................................................................................................... 9 5.3 FIRE DETECTION & RESPONSE................................................................................................................. 10 5.4 FIRE SUPPRESSION ................................................................................................................................... 10

6. FIRE WATER RISK ASSESSMENT ................................................................................ 11

6.1 POTENTIAL FIRE LOAD CRITERIA ............................................................................................................ 11 6.2 FIRE RISK CRITERIA ................................................................................................................................ 11 6.3 ENVIRONMENTAL LOAD .......................................................................................................................... 12 6.4 ENVIRONMENTAL RISK CRITERIA ............................................................................................................ 13 6.5 FIRE OUTBREAK ...................................................................................................................................... 13 6.6 FIREWATER VOLUMES ............................................................................................................................. 14 6.7 RETENTION REQUIREMENT ...................................................................................................................... 15 6.8 SOURCE-PATHWAY-RECEPTOR RISK ASSESSMENT ................................................................................. 15

7. CONCLUSIONS ......................................................................................................... 16

7.1 CONCLUSIONS ......................................................................................................................................... 16

APPENDIX 1 Firewater Retention Plan

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1 of 16 Data\17\138_14-Bellview Port\ Firewater Risk Assessment November 2017 (CMG)

1. INTRODUCTION

Glanway Ltd operates its Materials Recovery Facility at Belview Port under an Industrial Emissions Licence (P1015-01) issued by the Environmental Protection Agency (the Agency). The installation occupies two units (Building 5 and 6) of a seven unit warehouse complex and is involved in the manufacture of refuse derived fuel (RDF) from non-hazardous municipal solid waste. Conditions 3.9.1 requires the licence holder to carry out a risk assessment to determine if the activity should have a fire-water retention facility. Condition 3.9.2 stipulates that if a significant risk exists for the release of contaminated fire-water, the licensee shall, based on the findings of the risk assessment, prepare and implement, with the agreement of the Agency, a suitable risk management programme. Condition 3.9.4 requires the licensee to have regard to the Environmental Protection Agency Draft Guidance Note to Industry on the Requirements for Fire-Water Retention Facilities when implementing Conditions 3.9.1 and 3.9.2. It is proposed to accept and process approximately 38,000 tonnes of air pollution control residue and approximately 2,600 tonnes of aqueous waste at the installation in an adjoining unit (Building 7) and new annex. It is also proposed to extend waste storage activities into a second adjoining unit (Building 4). These changes will require a review of the IE licence and the firewater retention assessment prepared by Glanway in 2015 has been revised to take into consideration the additional waste types, processes and storage areas. The revision which was based on the Agency’s draft Guidance Note and recent experience of fires at waste management facilities in Ireland, included:

The identification of existing and potential hazards (evaluation of the materials and waste products typically stored on-site);

A review of existing control measures, and

An assessment of the hazards associated with: - i. The probability of an accident occurring; ii. Its impact both on-site and off-site (soil, water and air), and iii. The impact of an incident on sensitive receptors (residents, schools, businesses,

hospitals etc). The data sources included the Environmental Impact Assessment Report (EIAR) prepared as part of an application for planning permission for the proposed development and the revised Environmental Liability Risk Assessment.

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2. FACILITY OVERVIEW

2.1 Site Layout

The Glanway Ltd waste operations are currently carried out in two units (Buildings 5 and 6 total 3,768m2) of a seven unit complex (Buildings 1-7). Glanway Ltd is currently authorised to accept and process 95,000 tonnes per annum of non-recyclable household and commercial wastes to manufacture refuse derived fuel which is then exported to Europe for incineration. It is proposed to accept, treat and/or bag an additional annual total of approximately 38,000 tonnes of Air Pollution Control Residue (APCR) and approximately 2,600 tonnes of aqueous waste. This will be carried out in Building 7 and a new Annex. It is also proposed to accept and store pending export for recovery non-hazardous wastes including construction and demolition wastes and scrap metal in Building 4. The total area will be 5,800m2. The site layout is shown on Drawing No. 810. Buildings 4, 5 and 6 each occupy 1,867m2 and have a steel portal frame design with 6.5m high reinforced concrete walls above which are metal cladding with galvanised steel roof purlins and metal cladding roof sheets. The roof apex in each building is 16.95m above ground level. Building 7 occupies 1,433m2, has a 6.5m high reinforced concrete dividing wall between it and Building 6 and two roller shutter doors on the eastern elevation. The Annex will occupy 198.3m2 and comprise a steel portal frame with metal cladding There are roller shutter doors on the eastern elevations of Buildings, 4, 5, 6 and 7 and the Annex, with pedestrian emergency exits on the eastern and western elevations of all of the buildings. The floors in all buildings are concrete paved and there are no internal drains. There are 300mm ramps at the doors on Buildings 4, 5 and 6 and 100mm ramp will be provided at the doors in Building 7 and the Annex. The open yards surrounding the warehouse complex and which is outside the licensed area is paved. 2.2 Waste Activities Building 5 houses the MSW waste processing equipment, which comprises a shredder, trommel, magnet and baler. The baled waste is stored inside Buildings 5 and 6. There is a containerised OCU comprising an extraction fan, carbon filter and emission stack at the southern side of Building 5. The conditioning and storage of the APCR will be carried out in Building 7 and in the proposed adjoining Annex. The Annex will house the powder tanker unloading bay, storage silos, conditioning plant and an aqueous waste storage tank. The conditioned APCR will be stored in Building 7. Building 4 will be used for the storage of non-hazardous, mainly inert waste.

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2.3 Site Security Access to the facility is through the main port entrance which is staffed 24 hours a day. A CCTV surveillance system is also in place at the entrance and yard lighting is provided across the port.

2.4 Services

The port is serviced by electrical and mains water supplies. The existing Glanway Ltd waste operations do not generate a trade effluent. Sawdust is used to absorb leachate seepages that occur from the bales while they are stored inside the building. Sanitary wastewater from the staff welfare facilities, which are outside the licensed area, is stored in a tank and removed off-site to the Irish Water wastewater treatment plant located in Gorteens, approximately 1.5 km from the facility. Rainwater runoff from the building roofs and the paved areas surrounding the buildings, which are outside the licensed area is collected in the port’s surface water drainage system and directed to a settlement tank and oil interceptor located at the northern end of Belview Quay and then discharged to the Suir at the northern end of the Port of Waterford Quay. 2.5 Safety and Hazard Control Glanway Ltd. has adopted an Accident Prevention Policy and prepared a Safety Statement that identifies and evaluates the on-site potential hazards and describes the control measures in place to mitigate the hazards associated with operations. All site staff receive the appropriate training for their particular roles including the use of appropriate personal protective equipment (PPE) and the spill response equipment that will be deployed in the event of an accidental release of the APCR. PPE includes facemasks, gloves, safety glasses, steel-toed footwear, overalls, reflective jackets and helmets.

Silo filling, silo level monitoring and discharging will be managed by a Silo Control System (SCS), which will also control the safety systems and provide a read out of the loading and discharging data to the operator. 2.6 Environmental Sensitivity 2.6.1 Surrounding Land Use The lands to the south and west are used for agricultural purposes, tillage and grassland. To the south-east is O’Brien’s Quay which is used for loading and unloading bulk cargo, to the south of which is a cement manufacturing plant. To the east is the port container shipping area. To the north are office buildings, the N29 National Primary Road and the main entrance to the port. North of the N29 are commercial

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and industrial facilities. There are two private residences within 500m of the facility, the closest of which is 390m from the site boundary. 2.6.2 Hydrology

The site is in the catchment of the Lower Suir Estuary which is approximately 100m to the south-east. The Lower Suir Estuary is designated as a Transitional Water Body (i.e. surface water in the vicinity of a river mouth, which is partly saline in character as a result of its vicinity to coastal waters, but which is substantially influenced by freshwater flows) under the Water Framework Directive (Directive 2000/60/EC). 2.6.3 Geology & Hydrogeology.

The soils and subsoils in the locality comprise made ground that overlies acid brown earths, with complexes of brown podzolics and gley soils. The underlying geology is derived from Ordovician, Silurian and Cambrian shale, and glacial till. The bedrock beneath the site is composed of siltstones and shales and is classified as a regionally important aquifer in productive fissured bedrock. The vulnerability to pollution from sources at the ground surface is extreme. The site is entirely covered with buildings with paved concrete floors, which effectively prevents groundwater recharge. The direction of groundwater flow is expected to be in a south to south easterly, generally in the same direction as the regional topography towards the Lower Suir Estuary. 2.6.4 Designated Sites

The facility is adjacent to Lower River Suir Special Area of Conservation (SAC) (Site Code: 001237).

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3. OPERATIONAL AREA

3.1 RDF Manufacture (Buildings 5 and 6) The incoming waste is visually inspected to ensure that all non-conforming, or dangerous (e.g. compressed gas cylinders), are removed before the materials are processed. The non-conforming materials are stored in a designated quarantine area pending removal from the site. The waste is then shredded, screened to remove organic fines and passed beneath a magnet to remove ferrous metals. The residual wastes are baled and the bales stored inside the buildings pending shipment overseas. When there is sufficient for a shipment, the bales are loaded onto trailers inside the building which are then driven to the quayside. The bales are lifted directly from the trailer using a crane mounted grab and placed into the ship’s hold. The bales are never stored on the quayside. The organic fines and metals removed from the incoming wastes are temporarily stored inside the building pending consignment to authorised waste treatment facilities. 3.2 APCR Processing (Building 7 and Annex) The APCR will be delivered to the facility in road silos tankers. The vehicle will reverse into the unloading bay in the Annex and the access door will be closed. The APCR will be off-loaded using the vehicle’s air compression system and a wire armoured hose into an above ground silo (200m3). The aqueous waste will be delivered in road tankers. The tanker will reverse into the unloading bay in the Annex and the door will be closed and the liquid will be pumped to the storage tank (75m3).

3.2.1 Conditioning Plant

The APCR will be transferred from the silo to the conditioning plant using an enclosed conveying screw. The unit will be fully contained and will comprise a mixing drum and stainless steel internal water spray bars. The conveying screw will be set on load cells and the amount of water/aqueous waste added will be controlled by the weight of the APCR entering the unit and/or the required moisture content of the treated materials.

Water and/or aqueous waste will be applied and mixed with the APCR to produce a damp slurry like consistency. A loading hose will connect the discharge point on the conditioning plant to the stockpile conveyor. The hose, which prevents the material from falling onto the ground, can be lifted and lowered via a cable winch. The conveyor will transfer the conditioned material into Building 7, where a loading shovel will be used to move it to the two storage bays.

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An 85m2 exclusion zone (17m x 5m) will be set up inside one of the entrance doors. This area will be kept free of the conditioned APCR to prevent it sticking to wheels of the vehicles used to bring the material to the quayside. When there is enough conditioned APCR to fill a ship, a truck with an articulated trailer will reverse into the building and park in the exclusion zone. The conditioned APCR will be loaded into the trailer using the loading shovel. The trailer will be brought to the quayside where the contents will be transferred into the ship’s hold using a crane mounted grab.

3.2.2 Bagging Plant

The unit will comprise a steel frame, a loading cell and a stainless steel fill head. The APCR will be fed from the silo to the conditioning plant. The conveyor used to transfer the conditioned APCR into Building 7 will be moved to one side to allow the hose from the plant’s outlet to connect to the bagging unit’s fill head. A clamping cone will seal the bag opening to the fill head. The clamping cone will have two connections, the first will be to a fan that will inflate the bag and the second will be a dust extraction vent that connects to a cartridge dust filter. The filling rate will be controlled by an auto cycle weighing scale. There are two speeds of fill, bulk fill and toggle fill. The bulk fill transfers the majority of the APCR into the FIBC and the toggle fill regulates the final flow to reach the desired weight. After the bag has been filled it will be tied. The bags will be loaded directly into containers and the containers moved to the quayside, pending loading onto a ship. 3.3 Storage & Export of Non-Hazardous Waste (Building 4) It is proposed to accept and store non-hazardous, construction and demolition waste, bottom ash and slags, and metals pending export in Building 4. The waste, with the exception of construction waste containing gypsum, will be inert. 3.4 Inventory of Raw Materials and Wastes The non-hazardous household and commercial wastes and the baled RDF are stored in Buildings 5 and 6. The APCR will be handled and stored in Building 7 and the Annex. The non-hazardous inert waste and gypsum will be stored in Building 4. The maximum amount of waste on site at any one time will be 500 tonnes of loos and 5,000 tonnes of baled MSW, 5,000 tonnes of conditioned and unconditioned APCR, 75m3 of aqueous waste and 1,000 tonnes of inert non-hazardous waste. Oil is not stored at the facility. The mobile plant is refuelled using a mobile tanker provided by Unecol, who also service the other mobile plant in the port. The refuelling is carried out on a concrete pad outside the buildings generally twice weekly.

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3.5 Plant and Equipment The plant and equipment used in the MSW processing are:

Metso M&J 4000 Shredder

Galaxy Range Trommel

Flexus Baler system

New Holland Tele-handler

Wheeled excavator The conditioning and bagging process will involve the use of the following:

1 No. Storage Silo

1 No. Air Compressor

1 No. Screw Conveyor

1 No. Conditioning Plant

1 No. Stockpile Conveyor

1 No. Aqueous Waste Storage Tank

1 No. Bagging Unit

1 No. Loading Shovel

1 No Vacuum Collection Unit

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4. FIRE CHARACTERISTICS OF MATERIALS ON-SITE

4.1 Materials Classification

The residual municipal waste accepted and processed and stored in Buildings 5 and 6 are combustible. The APCR that will be accepted, processed and stored in Building 7 and the Annex, and the non-hazardous waste that will be stored in Building 4 are not combustible. The APCR is classified as hazardous primarily due to its high alkalinity that makes it corrosive. The maximum amount stored on site at any one time will be 4,000 tonnes. A Safety Data Sheet is not available for the material.

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5. FIRE SAFETY MANAGEMENT SYSTEM

5.1 Fire Fighting Management System

The fire safety management system at the facility comprises:

Fire prevention

Fire detection

Fire suppression

5.2 Fire Prevention Measures

The following principles are applied to the storage of combustible materials

Glanway Ltd has prepared a Waste Storage Plan for Buildings 5 and 6 where the combustible wastes are processed and stored. The method of storage is generally consistent with the recommendations in Appendix 1 of ‘Reducing Fire Risk at Waste Management Sites (Waste Industry Safety and Health Forum 2014)’.

Regular inspection of plant and equipment for leaks and damage to prevent spillage of flammable liquids.

Removal of any gas containers or unidentified liquids/chemicals from the off-loading areas to the quarantine area immediately such items are noticed.

5.2.1 Control of Sources of Ignition The potential sources of ignition at the facility include;

Arson/vandalism.

Naked flames/smoking.

Incidents related to welding and cutting.

Electrical faults/heating faults/equipment failures, and

Self-heating of waste that has been stockpiled for too long.

The controls measures applied to minimise ignition sources include;

The port’s security fencing and CCTV system to prevent unauthorised entry.

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No smoking policy.

Only authorised personnel are permitted within the processing areas.

Minimising the amount of combustible waste stockpiled at the facility, and

Hot Works Permit system in place (EHS1.4)

5.3 Fire Detection & Response

Glanway Ltd has prepared a Fire & Emergency Response Procedure (EHS 1.0) and a Site Evacuation Procedure (EHS 1.1) that describes the response actions in the event of a fire. During operational hours the site is fully manned. The nearest Supervisor and Facility Manager are immediately informed of any fire outbreak and are responsible for organising the response actions. Outside the operational hours the installation is monitored by the port’s security system which will alert the emergency services in the event of a fire.

5.4 Fire Suppression

The on-site fire abatement equipment includes:

Fire extinguishers located at strategic points around the facility,

4 No. hydrants located on fire ring main around the ware house complex. .

In the event of an emergency call out, Waterford Fire Service tenders will bring water to the site. The volume of water varies depending on number of tenders or tankers. Normally approximately 4 fire tenders with 1.82m3 capacity each are dispatched to an incident at a facility such as this. Additional fire-fighting water can be obtained from the River Suir.

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6. FIRE WATER RISK ASSESSMENT

Risk Assessment is defined in the Draft Guidelines as ‘an assessment of the risk that an industrial facility poses to the environment during a fire that brings fire-water into contact with operations or substances that would cause significant pollution’. Contaminated fire-water is defined as ‘water that has become contaminated with process materials used at a facility and the products resulting from combustion’. A review of site operations identified only one drainage area for risk assessment purposes. This is the drains that collect rainwater run-off from the buildings.

6.1 Potential Fire Load Criteria The potential fire load is determined by the type of combustible materials present and the likely rate of combustion. The criteria used in this assessment are set out in Table 6.1.

Table 6.1 Fire Load Criteria

Low Load Quantities of poorly combustible material

Medium Load Significant quantities of combustible materials

High load Substantial quantity of combustible materials, or large quantity of flammable liquids

The Fire Load at the site is ‘Medium’ due to the quantities of combustible materials on site at any one time.

6.2 Fire Risk Criteria The fire risk criteria are:

Risk of ignition

Risk of non-detection

Risk of failure to extinguish correctly/quickly The risk of ignition is lowest where there are no flammable or highly flammable materials, such as liquids or gases present, or where they are present only in small quantities. The risk

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of non-detection is highest in an area that is unoccupied/unmonitored for a prolonged period of time and when there is no automated fire detection system. The risk of failure to extinguish a fire quickly and fully is dependent on quick detection and appropriate fire extinguishing techniques. If detected promptly and the appropriate corrective actions are taken, the risk is considered to be Low. If a fire is not likely to be detected quickly, the risk is considered to be Medium. The Fire Risk Categories used in this assessment are set out in Table 6.2.

Table 6.2: Fire Risk Categories

Low Risk Where fire is an unlikely risk

Medium Risk Where fire is a possible risk

High Risk Where a fire has feasible potential

The Fire Risk at the site is considered to be Low due to a combination of limited ignition sources, the likely rapid detection of a fire, the on-site suppression capacity including staff training and proximity to the Waterford Fire Services.

6.3 Environmental Load The environmental load is an assessment of the likelihood of environmental impacts to surrounding soils, air, surface and groundwater. The severity of the impacts depends on the characteristics and quantities of materials on-site at the time of a fire that have the potential for significant degradation of the receiving environmental media. The main assessment criteria are:

BOD

Acute toxicity effects

Persistence of the pollutant

Risk of bio-accumulation

The Environmental Load Criteria are set out in Table 6.3.

Table 6.3 Environmental Load Criteria

Low Load Minor potential for degradation of receiving air/soil/water

Medium Load Potential for minor degradation and/or long term effects to receiving soils/waters

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High Load Potential for major degradation and long term effects to receiving air/soil/water

The Environmental Load is High to the nature and quantity of the combustible and hazardous materials on-site at any one time.

6.4 Environmental Risk Criteria The assessment of the environmental risk presented by a fire is based on a combination of the risk and extent of a fire, the environmental load and the area at risk. The latter includes:

The extent of air/soil/water polluted

Use of receiving air/soil/water (crop production, potable water, livestock, water irrigation, fishing, wetlands/wildlife habitat or public amenity use)

The Environmental Risk Criteria used in this assessment are presented in Table 6.4.

Table 6.4 Environmental Risk Criteria

Low Risk Not a significant risk, protective measures may be required in the long term

Medium Risk Discernible risk, where proactive remedial works or protective works may be required

High Risk Extremely hazardous risk of significant environmental degradation and preventative action is required immediately

The Environmental Risk is Low. The site is entirely covered by buildings that have concrete paved floors, which minimises the risk of soil and groundwater contamination in the event of a fire. The buildings are designed to retain water inside the structures. The interceptor on the surface water drainage system serving the port will retain oil in the water, but not dissolved contaminants.

6.5 Fire Outbreak

The most likely location of an outbreak is Building 5, where there are electrically powered conveyors, screens, magnets and separators and where combustible waste is processed. There is a lesser risk of a fire occurring in Building 6 where the baled wastes are stored due to the limited ignition sources. However, if there is a fire in Building 5 it is likely it will spread into Building 6. Buildings 5 and 6 have a steel frame structure on top of 6.5m high cast concrete walls topped with metal cladding. The adjoining Building 7 has a similar construction and the Annex will have a steel frame and metal cladding. All buildings will have the appropriated fire certificates.

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Given the building construction and the non-combustible nature of the APCR in Building 7 and the Annex, and the non-hazardous wastes in Building 4, it is unlikely that a fire in Building 5 and 6 would spread to the adjoining structures.

6.6 Firewater Volumes

The Draft Guidance assumes a fire will last 45 minutes; however recent experience of fires at waste recovery facilities indicates a fire can last for many hours, if not days. Account must also be taken of a significant rainfall event on the day of the fire. The Draft Guidance specifies a rainfall event of at least 50mm. Although the likelihood of a fire occurring during a 50mm rainfall event is very low, making provision for such an event will accommodate run-off volumes from fire that lasts longer than anticipated.

Given the quantities of combustible wastes that are stored inside the buildings and the building construction (portal frame with mass concrete walls and metal sheet cladding) it has been assumed that firefighting will continue for 8 hours. In the initial stages the firewater will evaporate, with run-off only being generated in the latter stages. For the purpose of this assessment, it was assumed that run-off will be generated over the last two hours of the incident, where the fire services continue to apply water to ensure fire has been fully extinguished. The likely firewater volumes arising due to a fire in the Buildings 5 and 6 are in Table 6.5.

Table 6.5 – Buildings 5 & 6

Parameter Calculation

Area 3,734 m2

Containment inside the buildings 1,120 m3

Available Containment 1,120 m3

Tender Vehicle Capacity x 4 10.92 m3

Duration of Fire 1.5 hours

Water Hydrant Delivery -3m3/minute/hydrant (2 No) 540 m3

Firewater (10.92m3 + 540m3) 550.92 m3

Potential Rainfall - 0.05m (30yr event) x 5,800 (Roofed 100%)3 290 m3

Total To be Contained 840.92 m3

The estimated volume of firewater generated during an incident, including an allowance for rainfall is 1082m3.

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6.7 Retention Requirement A fire in Buildings 5 and 6 will generate a total of 840.92m3 during a very heavy rainfall event. Glanway Ltd has prepared a Firewater Retention Plan, a copy of which is in Appendix 1. The available retention in Buildings 5 and 6 will 1,120m3, which is 279m3 more that the required retention. The overall retention capacity provides for a reduction in storage volume if afire occurs when there are a significant amount of bales stored in the building.

6.8 Source-Pathway-Receptor Risk Assessment Risk assessment is a scientific mechanism, which allows the various hazards, pathways and receptors present at a site to be evaluated. It uses a systematic and progressive approach in identifying the risks at a site with the aim of establishing a pollutant linkage from a hazard via a pathway to a receptor. If a pathway does not exist linking the hazard to a receptor, then the risk is absent. The pathways by which contaminated firewater can migrate from the site are

Surface water drainage system

Infiltration through the yard to ground

Overland flow across site boundary

The potential receptors are:-

Suir River

Groundwater

Neighbouring industrial/commercial premises

There are no pathways to groundwater. The retention capacity in Buildings 5 and 6 eliminates the direct pathway to surface water.

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7. CONCLUSIONS

7.1 Conclusions

The risk of fire is ‘Low’ based on the fire prevention, detection and response measures that are in place.

A fire duration of 2 hours during a heavy rainfall event would generate 1,082m3 of firewater. .

The currently available retention capacity is 1,291m3.

The available firewater retention capacity exceeds the estimated volumes of fire water that would be generated on site. Making an allowance for a 50mm rainfall event, which is unlikely to occur during the fire, provides additional retention capacity for incidents where firewater is generated for longer than 2 hours.

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APPENDIX 1

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Glanway Offices:

Clean Sustainable Recovery Terminal Building, Port of Waterford, Waterford T: 051 - 830540

Facility: Units 5 & 6, Belview Port, Waterford

Glanway Ltd CRO: 539379 VAT No: IE3237022LH

Glanway Fire Water Retention Plan

The following plan has been developed to retain any firewater that might be deposited on the floor of the

Glanway Plant in the event of a fire, and the fire brigade being subsequently called.

The following drawing is a representation of the Glanway plant:

It clearly shows that plant consists of two concrete sheds (Units 5&6) and it shows the 3 external doors. All

walls are made with reinforced concrete. The only places that water could escape the building are under

the doors.

Door 6-1 is the plant entrance and exit door. Door 6-2 is used occasionally if there is an issue with Door 6-1.

Door 5 is always closed. All doors are metal roller shutter doors however there is also a fast action door

inside door 6-1. There are also two doors (which are not shown on the drawing).

Glanway Plant

Extraction Point for OCU

Unit 5:

Waste Processing

Area + Storage Area

Plant Entrance

Unit 6:

Storage Area Door 5

Door 6 - 2

Door 6 - 1

Door 5 - 6

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Glanway Limited

Glanway Ltd., Company Registration number 539379, VAT number: IE3237022LH

2

In order to retain water in the building the doors need to be sealed. Door 5 is never opened, and no traffic

movement will ever be necessary through this door. As a result, we intend to install a permanent water

barrier here which will consist of an RSJ beam with a seal to the floor. This is a very simple and effective

solution. It will create a water tight barrier which is in excess of 300mm in height.

Demountable aluminium and steel flood barriers with water tight seals will be installed inside door 6-1 and

door 6-2. They will form a water tight barrier which will be 300mm high. The barriers in these doorways

need to be demountable for the obvious reason that these doors are used as the entrance and exit to the

plant by waste delivery trucks (Door 6-2 can be used as a backup in the event that there is a problem with

door 6-1). The barriers that we intend to install are supplied by the leading manufacturer in Ireland. They

have been tested in real world applications and have been shown to be successful. They provide similar

levels of protection to permanent flood defences.

Both openings will have 6380mm wide barriers installed. A small will be built just inside the left side of

Door 6-2 to facilitate the installation of barriers that are the same size and interchangeable between the

doors. There is a fast action door inside the roller shutter door. The barrier inside Door 6-1 will be mounted

between this fast action door and the outer roller shutter door.

The reason for this is that in the event of a fire it is possible that the fast action door could stop functioning

and remain shut so it is best that that barrier can be fitted from outside this door so that nobody has to go

into the building. The roller shutter door (6-1) is always left open as the fast action door effectively

replaced it.

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Glanway Limited


3

The demountable flood barrier for Door 6-2 will be left in position unless there is an issue with Door 6-1

and the entrance is needed. Door 6-1 will be stored outside the Glanway plant and will be inserted

immediately in the event of a fire. The barrier could be inserted every night in Door 6-1 when staff finish

work and leave the building, but this could impede any fire truck’s entry to the plant upon arrival, and

possibly cause an unnecessary delay in the firefighting process. Though it is envisioned that firefighters

would use the pedestrian entrance if fighting the fire and not drive into the building, based on experience

of fires at MRFs the fire services first response, if it is safe to do so, is to enter the building and if possible

drag the burning material outside, so we cannot be sure what might happen and are trying to be mindful of

time pressured situation.

UNIT 5

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Glanway Limited


4

The barriers will be supplied by floodgates Ireland, but external contractors will be employed to fit them

based on floodgate Ireland’s instructions.

Expandable floodgate barriers will be purchased for the pedestrian doors. Please refer to the following

document for details.

The plant dimensions are as follows: 67.5m (length) x 28.25m (width) x 2. Please refer to the top building in

the following document for details.

As 1m3 = 1000L of water, this means that a barrier of 300mm in height can retain the following amount of

water:

66.1 x 28.25 x 2 x .3 = 1,120 m3 = 1,120,000 L of water

Of course, in the event that the building is full with bales, then it is possible that the floor area could be

only 2/3 of its empty size, and therefore the barrier will only be able to retain 746,000L of water. However,

the average fire truck holds circa 1000 Gallons of water, which equals just under 4000L. An exact

calculation will show that a barrier of this height in a building of this size will retain the water from 186 fire

engines.

It should be fairly easy to fit the barriers in the event of a fire. The doors are a long way away from any

material (30m) and the barriers should only take a minute to slot into place. If a fire were to start 3

Glanway members of staff would be contacted immediately by the monitoring station, The Managing

Director, Operations Manager and Plant Supervisor, all of whom have infared cctv on their phones. One of

them would call the fire brigade and would have a reasonable chance of getting to the plant before the fire

brigade. The barriers could then be fitted once the fire brigade arrives (possibly with the help of a security

guard from the port weighbridge if only one member of Glanway staff is there).

It is also worth noting that we are currently working 18hours/day and there are security personnel in the

port weighbridge 24/7 (which is just over 100m from our plant).

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FIRE WATER RISK ASSESSMENT BELVIEW PORT …apex in each building is 16.95m above ground level....

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Transcript of FIRE WATER RISK ASSESSMENT BELVIEW PORT …apex in each building is 16.95m above ground level....