{"text_format":"1","workbook":"xlsx","n_sheets":12,"sheets":["Cover","Notes","Introduction","1) a) Source","1) b) Pathway","1) c) Receptors","2) Site Hazard Rating","3) Likelihood","4) Site Risk and Classification","5) Standard Containment Designs","Sheet1","Risk Scoring"],"not_rendered":{"charts":0,"images":15,"macros":1,"external_links":1,"defined_names":56,"comments":9,"pivot_tables":0},"unopened":[],"bounds":{"document_bytes":16777216,"sheet_cells":100000,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096},"cells_cut":0,"cells_raw":0,"read":"whole","date_system":"1900"}

{"sheet":"Cover","index":0,"n_rows":56,"n_cols":6,"rows_kept":56,"cut":false,"hidden":false,"merged":[]}
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[null,"JOB TITLE",null,null,null,"Yorkshire Water IED Permit"]
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[null,"JOB NUMBER",null,null,null,273231]
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[null,"MADE BY",null,null,null,"Bob Hudson / Darryl How"]
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[null,"CHECKED BY",null,null,null,"Edoardo Piano"]
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[null,"DATE",null,null,null,"2021-03-10"]
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[null,"Description of spreadsheet",null,null,null,"This spreadsheet provides a secondary containment risk assessment for Old Whittington Sludge Treatment Facility (STF) using the Anaerobic Digestion and Biogas Association (ADBA) secondary containment risk assessment tool. "]
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[null,"Sheet Number prefix",null,null,null,""]
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[null,"Member/Location",null,null,null,""]
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[null,"Drawing Reference",null,null,null,""]
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[null,"Filename",null,null,null,{"$f":"IF(CELL(\"filename\")=\"\",\"\",LEFT(CELL(\"filename\"),FIND(\"]\",CELL(\"filename\"))))","v":{"$error":"#VALUE!"}}]
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[null,"CONTENTS OF SPREADSHEET"]
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[null,"Sheet",null,"Description"]
[null,"Cover"]
[null,"Notes"]
[null,"Introduction",null,"Introduction to the ADBA Tool"]
[null,"1 a) Source",null,"The inventory of materials for Old Whittington STF is provided in the worksheet 1a) Source "]
[null,"1 b) Pathway",null,"The Pathway information for Old Whittington STF is provided in the worksheet 1) b) Pathway "]
[null,"1 c) Receptors",null,"The Receptor information for Old Whittington  STF is provided in the worksheet 1) c) Receptor."]
[null,"2) Site Hazard Rating",null,"The Site Hazard Rating is displayed in the worksheet 2) Site Hazard Rating"]
[null,"3) Likelihood",null,"The likelihood of loss of primary containment and the associated mitigation."]
[null,"4) Site Risk and Classification",null,"The Site Hazard Rating and Classification is in this worksheet"]
[null,"5) Standard Containment Design",null,"The Standard Containment Design is in this worksheet"]
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[null,"AUTHORISATION OF LATEST VERSION"]
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[null,"Type and method of check",null,null,null,"Review of method, inputs and assumptions"]
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[null,"Signatures & dates:",null,null,"Made by ","Kiran Parmar"]
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[null,null,null,null,"Checked "]
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[null,null,null,null,"Approved"]
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[null,"REVISIONS",null,null,"Current Revision "]
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[null,"Rev.","Date","Made by","Checked"," Description"]
[null,"v1","2021-11-30","KP","JP","Checked by PESL"]

{"sheet":"Notes","index":1,"n_rows":62,"n_cols":3,"rows_kept":62,"cut":false,"hidden":false,"merged":[[39,1,39,2],[46,1,46,2],[52,1,52,2],[61,1,61,2],[1,1,1,2],[3,1,5,2],[6,1,6,2],[7,1,9,2],[15,1,15,2],[19,1,19,2]]}
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[null,"(1) Purpose of spreadsheet"]
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[null,"This spreadsheet outlines the information and data utilised, as well as the assumptions applied to undertake a secondary containment risk assessment for Old Whittington STF based on the using the Anaerobic Digestion and Biogas Association (ADBA) secondary containment risk assessment tool and associated guidance. The ADBA risk assessment is based on CIRIA 736  Containment systems for the prevention of pollution: Secondary, tertiary and other measures for industrial and commercial premises. "]
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[null,"(2) Key Assumptions"]
[null,"Any assumptions are outlined in the spreadsheet."]
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[null,"(3) Basis of calculations"]
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[null,"ADBA Risk Assessment tool."]
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[null,"(4) References"]
[null,"All references are outlined in the spreadsheet."]
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[null,"(5) Special features"]
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[null,null,"Input Cell"]
[null,null,"Key Outputs"]
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[null,"(6) Holds or items that require Clarification"]
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[null,"(7) Summary"]
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[null,"Best Practice Guide"]

{"sheet":"Introduction","index":2,"n_rows":75,"n_cols":9,"rows_kept":75,"cut":false,"hidden":false,"merged":[]}
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[null,null,null,null,null,null,null,"Although this tool works as a standalone tool, we recommend you read this first:","ADBA CIRIA736 Bund Classification Assessment"]
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[null,"There are 5 steps to follow:"]
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[null,"1)","Identify the hazard posed to the environment by the inventory of materials held on the site and the location of the site"]
[null,null,"a. Categorise the source"]
[null,null,"b. Identify the pathways"]
[null,null,"c. Identify the receptor"]
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[null,"2)","The Site Hazard Rating is derived by this tool from the combination of the hazards assessed above"]
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[null,"3)","Calculate the likelihood of a loss of primary containment event occurring"]
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[null,"4)","The combination of the Site Hazard Rating and the likelihood of a loss of containment occuring gives the site risk rating and required secondary containment classification"]
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[null,"5)","From the class of containment needed, identify suitable designs from the 'Standard Containment Designs' sheet"]
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[null,"Additional Guidance"]
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[null,"The worksheets in this spreadsheet are protected to prevent inadvertant damage to the tool.  To remove the protection, the password is CIRIA736"]

{"sheet":"1) a) Source","index":3,"n_rows":39,"n_cols":15,"rows_kept":39,"cut":false,"hidden":false,"merged":[[25,1,25,3],[3,12,3,14],[5,12,7,12]]}
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[]
[null,"Material","Material","Total Enclosed Quantity","units","Storage","Flammability","Corrosive","Ecotoxicity (based on LD and quantity)","Environmental hazard rating ","Justification",null,"Risk quantification"]
[null,"Feedstock",null,null,null,null,null,null,null,null,null,null,"Material","Volume (m3)","Environmental Hazard Rating"]
[null,"Imported sludge liquid","Liquid",183,"m3","Imported Sludge Buffer Tank (10 yrs old) and Associated Pipework","Not flammable","No","Low","M","Permitted waste types are non-hazardous however the volume is not significant.",null,"Wet Sludge","0-99","Low"]
[null,"Indigenous sludge","Liquid",3200,"m3","Two Drum Thickener Feed  Tanks (8 yrs old) and Associated Pipework","Not flammable","No","Low","H","Permitted waste types are non-hazardous however the volume is significant.",null,null,"100-999","Medium"]
[null,null,null,null,null,null,null,null,"Feedstock Overall Rating","H","Any material with a \"High\" rating means the overall rating is High",null,null,"1000+","High"]
[null,"Process"]
[null,"Thickened Sludge","Liquid",926,"m3","Two Digester Feed Tanks (10 yrs old) and Associated Pipework","Not flammable","No","Low","M","Permitted waste types are non-hazardous however the volume is below 1,000m3."]
[null,"Digesting Sludge","Liquid",4600,"m3","Two Digesters (8 yrs old) and Associated Pipework","Not flammable","No","Low","H","Permitted waste types are non-hazardous however the volume is significant."]
[null,"Digested Sludge","Liquid",1458,"m3","Two Dewatering Feed Tanks (12 and 9 yrs old) and associated Pipework","Not flammable","No","Low","H","Permitted waste types are non-hazardous however the volume is significant."]
[null,"Digested Cake","Solid",15000,"tonnes "," Cake Pad ","Not flammable","No","Low","M","Largely immobile therefore presents only a medium risk."]
[null,"Digested Sludge Liquors","Liquid",494,"m3","Liquors Return Buffer Tank (9 yrs old) and associated pipework","Not flammable","No","Low","M","Permitted waste types are non-hazardous however the volume is below 1,000m3."]
[null,null,null,null,null,null,null,null,"Process Overall Rating","H","Any material with a \"High\" rating means the overall rating is High"]
[null,"Additives and site chemicals"]
[null,"Liquid polyelectrolyte – thickening plant","Liquid",1,"m3","Stored in IBC's and bunded as per YW asset standards","Not flammable","No",null,"L"]
[null,"Powder polyelectrolyte – dewatering plant","Solid",750,"kg","Stored in tanks and bunded as per YW asset standards","Not flammable","No",null,"L","Low ecotoxicity for the quantities stored"]
[null,"Ferric Chloride","Liquid",1.5,"m3","Stored in above ground silo within concreted area bunded as per YW asset standards","Not flammable","No",null,"L","Low ecotoxicity for the quantities stored. Low in the example in the ADBA Tool."]
[null,"Lubricating Oil","Liquid","Small amounts",null,"Fresh or waste oil is stored as per YW asset standards","Flammable","Yes",null,"H","Oil has a high rating volumes used for machine servicing are taken onto and off site when required, with small amounts held in small containers within the installation."]
[null,"Diesel - Vehicle fuel for  \nfront loader  ","Liquid",1,"m3","Stored securely and bunded as per YW EMS procedures","Flammable","Yes",null,"H","Diesel has a high rating however there are only very small volumes used for machinery at any one time, which is stored out of the installation."]
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[null,null,null,null,null,null,null,null,"Chemicals Overall Rating","L","The overall source assessment for additives and site chemicals is  considered to be low, because only very small volumes of oils kept on site and this is handled and stored appropriately. "]
[null,"Fire fighting agents and cooling water spillages"]
[null,"Fire Fighting Agents harmful in their own right or contaminated by inventory","Liquid",null,null,null,"Not flammable","No","Low","L","Low in the example in the ADBA Tool."]
[null,"Fire fighting and cooling water contaminated by inventory",null,null,null,null,"Not flammable","No","Low","L","Low in the example in the ADBA Tool."]
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[null,null,null,null,null,null,null,null,"Spillages Overall Rating","L","All the hazards are \"Low\" therefore the overall rating is low"]
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[null,null,null,null,null,null,null,null,"Sources Overall Hazard Rating",{"$f":"IF(OR(J8=\"H\",J15=\"H\",J25=\"H\",J31=\"H\"),\"H\",IF(OR(J8=\"M\",J15=\"M\",J25=\"M\",J31=\"M\"),\"M\",\"L\"))","v":"H"}]
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["H"]
["M"]
["L"]

{"sheet":"1) b) Pathway","index":4,"n_rows":102,"n_cols":19,"rows_kept":102,"cut":false,"hidden":false,"merged":[]}
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[null,null,null,null,null,null,null,null,null,null,null,"Postcode","S41 9QU "]
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[null,"Pathway - the route from primary containment to receptor",null,null,null,null,null,null,null,"Environmental hazard rating ","Notes","Source","Description","Link","Source","Description","Source","Description","Link"]
[null,"Site layout and drainage"]
[null,"If any of the site inventory has a runoff time of a few minutes…",null,null,null,null,null,null,null,null,"N/A  - Run-off time is an estimate of how long it would take to flow to the nearest receptor.","PondSIM modelling","Completed November 2021"]
[null,"If any of the site inventory has a runoff time of a few hours.…",null,null,null,null,null,null,null,null,"N/A  - Run-off time is an estimate of how long it would take to flow to the nearest receptor."]
[null,"If any of the site inventory has a runoff time of a few days…",null,null,null,null,null,null,null,"M","It is assumed the site inventory has a runoff time of a few days due to the form of sludge and the distance to the receptors. 3D modelling has been completed for Old Whittington STF that identifies no sludge would leave the wider site during catastrophic tank failure . The physical property of sludge is slow flowing suspension and relatively immobile, the size of the site and it would remain on-site."]
[null,"If any of the site inventory has a runoff time of a few weeks…"]
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[null,"Topography, geology and hydrology"]
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[null,"Made Ground",null,null,null,null,null,null,null,"M","A Medium rating has been selected. The BGS GeoIndex (BGS, 2021) indicates the present of infilled ground beneath the cake pad. However, the artificial ground mapping provided within the Envirocheck report (2020) (Appendix 2) positions the infilled ground in the southern central area of the installation, beneath the drum thickener building and bulk sludge storage assets.  This is likely to be a reflection of the different mapping scales.  No information is provided on the nature or origin of this material in either case. \nThe Landmark Envirocheck report (2020) also records infilled land on the southern boundary of the installation associated with the former mining activity in the area, as observed on historical maps. \nIt is likely, given the history of the area, that made ground comprising a mixture of cohesive and non-cohesive materials is present across the whole of the installation area, reflecting reworked natural strata, demolition materials derived from sequential site development, and sewage related substrate. \nFurther infilled ground is mapped by both the GeoIndex and Envirocheck report (2020) c.250m to the east, associated with opencast mining activity at the former Dixon Coal Site. This area is listed as a historical landfill site which received waste, including industrial and special wastes, after 1986. ","BGS geoviewer","Borehole logs","http://mapapps2.bgs.ac.uk/geoindex/home.html","WML Application Old Whittington - Atkins","The southern area of the WwTW is underlain by Made Ground as a result of the area being used as an open cast colliery and being incorporated into the WwTW in the late 1960’s."]
[null,"Alluvium - Superficial deposits - Secondary A aquifer",null,null,null,null,null,null,null,"M","The superficial deposits are secondary A aquifer therefore a Medium Environmental Hazard Rating has been selected.Superficial Deposits are shown to be absent from the installation area. Alluvium is shown on land to the east, following the River Rother.  The BGS Lexicon (BGS, 2021) described Alluvium as typically comprising consolidated soft to firm, compressible silty clay containing layers of silt, sand, peat and basal gravels possibly with a stronger, desiccated surface.  ","MAGIC Landscape Geology and Soils Aquifer Designation Map (Bedrock) (England) \n\n","Aquifer Designation Map (Superficial Drift) (England)\nTypology Secondary A\nGroundwater Vulnerability Map (England)\nClassification Medium\nSoilscape (England)\nReference 20\nName: LOAMY AND CLAYEY FLOODPLAIN SOILS WITH NATURALLY HIGH GROUNDWATER\nMain Surface Texture Class: LOAMY\nNatural Drainage Type: NATURALLY WET\nNatural Fertility: MODERATE\nCharacteristic Semi-natural Habitats: WET FLOOD MEADOWS AND PASTURE WITH WET CARR WOODLANDS\nMain Land Cover: GRASSLAND SOME ARABLE","https://magic.defra.gov.uk/MagicMap.aspx",""]
[null,"Pennine Lower Coal Measures - Bedrock - Secondary A aquifer",null,null,null,null,null,null,null,"M","The Pennine Lower Coal Measures are a secondary A aquifer therefore a Medium Environmental Hazard Rating has been selected. The Pennine Lower Coal Measures are likely to be hydraulically connected to the River Rother (receptor), and may feed the river through baseflow via the superficial deposits. \nThe thickness of the Lower Pennine Coal measures at the site is expected to be high (up to 550m regionally). - There is no significant faulting across the site. It is expected that there will be some hydraulic connectivity between the bedrock and Bluebank Pools (LNR) to the east of the wider site and also Brearley Wetland (LNR) to the north of the site. \n\tBlackshale Ironstone – 18 m depth, last worked in 1900. Working located beneath the installation, with an extraction thickness listed as being 100 cm. \n•\tBlackshale Coal – 22 m depth, last worked in 1882. Working located beneath the installation, with an extraction thickness listed as being 200 cm.  ","BGS","Pennine Coal measures group comprises grey mudstones and siltstones, with alternations of pale grey sandstone, the latter typically well cemented, fine-grained and often ochreous when weathered, together with frequent coal seams, palaeosol horizons and ironstones. Transmissivity of this formation estimated from a borehole nearby (SK 383 706) is of 10m^2/d. Argillaceous strata dominate, acting as aquitards or aquicludes, and isolating the thicker sandstone horizons that effectively act as separate aquifers. Coal Measures sandstones are generally fine-grained, very well cemented, extremely hard and dense and in consequence possess very little primary porosity or intergranular permeability. Groundwater storage and movement occurs predominantly within and through fractures in the sandstones. Under natural conditions the sandstones act as individual aquifers separated by the intervening impermeable argillaceous horizons, and thus constitute a complex multi-layered aquifer. Confined conditions are, therefore, common and groundwater often rises above the layer at which it is struck. Thickness up to 550m regionally.","http://pubs.bgs.ac.uk/publications.html?pubID=OR07039","Magic, BGS geoviewer","Secondary A aquifer, no faulting"]
[null,"River Rother",null,null,null,null,null,null,null,"M","The River Rother running downstream east of the WwTW, is situated within the 'Rother, Spittal Brook to Doe Lea' waterbody, part of the 'Rother and Doe Lea' operational catchment. This waterbody has an overall WFD classification of 'Moderate', with an ecological status of 'Moderate' and  a chemical status of 'Good'.  \n\nThe River Rother will transport any contaminants that enter the river through surface water runoff, groundwater flow and other potential receptors downstream. A medium risk has been selected as the D modelling for Old Whittington STF identifies all sludge would stay withhin the wider site during multi tank failure.","Catchment Data Explorer (CDE)","Mitigation Measures Assessment, Macrophytes, Fish and Invertebrates are reasons for the waterbody failing to meet 'Good' ecological status. ","https://environment.data.gov.uk/catchment-planning/WaterBody/GB104027057771"]
[null,"Chesterfield Canal",null,null,null,null,null,null,null,"L","The Chesterfield Canal, adjacent to the River Rother is situated within the 'Rother, Spittal Brook to Doe Lea' waterbody, part of the 'Rother and Doe Lea' operational catchment. This waterbody has an overall WFD classification of 'Moderate', with an ecological status of 'Moderate' and  a chemical status of 'Good'.  \n\nThe Canal will transport any contaminants that enter the canal through surface water runoff, groundwater flow and other potential receptors downstream. \nA low risk has been selected as the 3D modelling for Old Whittington STF identifies all sludge would stay within the wider site during multi tank failure, and the Canal is beyond the River Rother.","Catchment Data Explorer (CDE)","Mitigation Measures Assessment, Macrophytes, Fish and Invertebrates are reasons for the waterbody failing to meet 'Good' ecological status. ","https://environment.data.gov.uk/catchment-planning/WaterBody/GB104027057771"]
[null,"Mitigation - do these apply?"]
[null,"Some secondary and tertiary containment system is present (see Likelihood assessment)"]
[null,"Spills will be contained within the hard surfaced and drained areas and returned to the WwTW for treatment. \n"]
[null,"2D modelling for Old Whittington STF identifies all sludge would stay on-site during multi tank catastrophic failure. \n"]
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[null,null,null,null,null,null,null,null,"Path & Mitigation Overall Rating","M","Justification: \n - The majority of spills will be contained within the hard surfaced and drained areas and returned to the WwTW for treatment. \n - There are geo-environmental barriers underlying the site such as made ground and clay but there is a risk of contamination transport to the river should spills occurs outside drained areas.\n - There is good secondary containment for chemicals, such as those used in the SPP processes i.e polyelectrolyte.\n - Modelling identifies a catastrophic spill  (failure of all tanks) would not leave the wider site."]
[null,"Climatic conditions"]
[null,"Annual rainfall < 1000 mm",null,888,null,null,null,null,null,"L"," - The annual rainfall is less than 1,000 mm","Met  Office","UK climate averages","https://www.metoffice.gov.uk/research/climate/maps-and-data/uk-climate-averages/gcqyqmgs3"]
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[null,"Fire Fighting Water"]
[null,"Flammable materials normally present on site in large quantities",null,null,null,null,null,null,null,"L"," - There is limited flammable materials on the STF that would combust over long periods and require significant volumes of fire fighting water. \n - The key flammable material is the biogas, which is contained within the double contained storage gas bag. Use and transfer of biogas is controlled via the site SCADA system, which included low and high pressure monitoring that would shut of any gas flows in the event of gas release, such as in a fire.\n - If firefighting was needed on the site the site drainage system returns surface water to treatment within the WwTW.\n - Fire water is therefore not  considered to be a pathway risk. "]
[null,"Fire fighting and cooling water contaminated by inventory",null,null,null,null,null,null,null,"L"]
[null,"Location"]
[null,"Flooding",null,null,null,null,null,null,null,"L"," - Flooding is a potential pathway and the site has been flooded in 2007, 2008 and 2020. This flooding has not affected the STF as it is on a raised platform and outside the flood zone. Therefore a low environmental hazard rating has been selected. \n\n\n","EA Flood Map for Planning","All the Old Whittington site is classified as a Flood Zone 3 as it is close to the River Rother.",null,"Black and Veatch (2010) Old Whittington WwTW FFD\nE5 – Ecology Report","2008 Extended Phase 1 Habitat Survey Arup undertook a baseline ecological study for the site, to identify any ecological constraints associated with proposed Environmental Reinstatement Works to reinstate plant and equipment damaged during flooding in 2007."]
[null,"Site is connected to a Wastewater Treatment Works",null,null,null,null,null,null,null,"L"," - The WwTW is designed with capacity to treat peaks in flow and loads including from surface water drainage input from the whole site.  \n - In the event of a catastrophic failure on site the SCADA system would manage the Wastewater treatment process to contain any attentional load within the system, where possible, or high level and treatment alarms would alert site operators or the Yorkshire Water central control room, who would start the emergency procedures in line with the site accident procedures in the site EMS and shut down/divert processes that risk the  WwTW discharge consent. \n - The potential risk of releases via the WwTW is considered to be low. \n"]
[null,"Site is connected to a CSO discharge.",null,null,null,null,null,null,null,"L","The site has a CSO however this is not connected to the site drainage therefore it presents a low environmental hazard rating. A catastrophic spill could also potentially connect with the Final Effluent outfall however this is also deemed to be a low risk due to the surfaced areas and associated drainage.\n"]
[null,"The site is predominantly flat.",null,null,null,null,null,null,null,"L"]
[null,null,null,null,null,null,null,null,"Site Considerations  Overall Rating","L"]
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[null,null,null,null,null,null,null,null,"Pathway Overall Hazard Rating",{"$f":"IF(OR(J24=\"H\",J38=\"H\"),\"H\",IF(OR(J24=\"M\",J38=\"M\"),\"M\",\"L\"))","v":"M"}]
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["H"]
["M"]
["L"]

{"sheet":"1) c) Receptors","index":5,"n_rows":96,"n_cols":18,"rows_kept":96,"cut":false,"hidden":false,"merged":[]}
[]
[null,null,null,null,null,null,null,null,null,null,null,"Postcode","S41 9QU "]
[]
[null,"Receptors","Within","units",null,null,null,null,null,"Environmental hazard rating ","Notes","Source","Description","Link","Source","Description","Source","Description"]
[null,"Watercourses and bodies"]
[null,"River Rother",75,"m",null,null,null,null,null,"H","The River Rother running downstream east of the WwTW, is situated within the 'Rother, Spittal Brook to Doe Lea' waterbody, part of the 'Rother and Doe Lea' operational catchment. This waterbody has an overall WFD classification of 'Moderate', with an ecological status of 'Moderate' and  a chemical status of 'Good'.  The River Rother will transport any contaminants that enter the river through surface water runoff, groundwater flow and other potential receptors downstream. \nAdjacent to the WwTW, there is a local nature reserve located in the area between the River Rother and the Chesterfield Canal. This is also an area of deciduous woodland and broadleaved forest. The wider area falls within a nitrate vulnerable zone.\nTherefore a High Environmental Hazard Rating has been selected. ","Catchment Data Explorer (CDE)","Mitigation Measures Assessment, Macrophytes, Fish and Invertebrates are reasons for the waterbody failing to meet 'Good' ecological status. ",null,"Yorkshire Water (2019) Desk top project ecology screening form","The site has been extensively surveyed and it may be that more detailed screening could prevent the need for more site surveys depending on the scale and timing of the development project. The site is extensively used by various bat species and there is evidence of reptiles using the site. Crayfish and water vole records exist in the wider area but are only likely to be of relevant to any planned riparian/in channel works"]
[null,"Alluvium - Superficial deposits - Secondary A aquifer","Beneath wider site",null,null,null,null,null,null,"M","Superficial Deposits are shown to be absent from the installation area. Alluvium is shown on land to the east, following the River Rother.  The BGS Lexicon (BGS, 2021) described Alluvium as typically comprising consolidated soft to firm, compressible silty clay containing layers of silt, sand, peat and basal gravels possibly with a stronger, desiccated surface.  ","MAGIC Landscape Geology and Soils Aquifer Designation Map (Bedrock) (England), BGS Geoviewer ","Secondary A Classification Medium\nTypologySecondary A\nAquifer Designation Map (Superficial Drift) (England)\nTypology Secondary A\nGroundwater Vulnerability Map (England)\nClassificationMedium\nSoilscape (England)\neference20\n","https://magic.defra.gov.uk/MagicMap.aspx http://mapapps2.bgs.ac.uk/geoindex/home.html"]
[null,"Pennine lower coal measures - Bedrock - Secondary A aquifer","Beneath wider site",null,null,null,null,null,null,"M","Classified as a Secondary A aquifer, therefore medium environmental hazard rating. •\tBlackshale Ironstone – 18 m depth, last worked in 1900. Working located beneath the installation, with an extraction thickness listed as being 100 cm. \n•\tBlackshale Coal – 22 m depth, last worked in 1882. Working located beneath the installation, with an extraction thickness listed as being 200 cm.  ","MAGIC Landscape Geology and Soils Aquifer Designation Map (Bedrock) (England), BGS Geoviewer ","Secondary A Classification Medium\nTypologySecondary A\nAquifer Designation Map (Superficial Drift) (England)\nTypology Secondary A\nGroundwater Vulnerability Map (England)\nClassificationMedium\nSoilscape (England)\neference20\n","https://magic.defra.gov.uk/MagicMap.aspx http://mapapps2.bgs.ac.uk/geoindex/home.html"]
[null,"Abstraction","N/A","m",null,null,null,null,null,"L","There are no reported active groundwater abstractions with 500m of the site. There are no active surface water abstraction licences within 250 m.   ","WML Application Old Whittington - Atkins - 2005","2005: There are no abstraction sites within 1km of the site.\nMagic maps: No SPZs"]
[null,"Bluebank Pools (LNR)","140m","m",null,null,null,null,null,"M","The Bluebank Pools (LNR) is located on part of the wider site therefore a Medium Environmental Hazard Rating has been selected. The LNR is located to the South  / East of the site on the Chesterfield Canal. ","MAGIC Land and Marine Based Statutory Designations","The Bluebank Pools (LNR) is located on part of the site.","https://magic.defra.gov.uk/MagicMap.aspx","Derbyshire County Council","The Bluebank Pools (LNR) is located on part of the site. The LNR is located on the Chesterfield Canal. There are Water Voles at the site. The oxbow pools, created when the River Rother was straightened to build the Great Central Railway, are an unusual feature and provide homes to a variety of wildlife. The oxbow pools, created when the River Rother was straightened to build the Great Central Railway, are an unusual feature and provide homes to a variety of wildlife. ","https://www.derbyshire.gov.uk/leisure/countryside/countryside-sites/waterways-wetlands/bluebank-pools-local-nature-reserve-lnr.aspx"]
[null,"Brearley Wetland (LNR)",280,"m",null,null,null,null,null,"L","Brearly Wetland LNR located c. 280 m north north east.  ","MAGIC Land and Marine Based Statutory Designations","The Brearley Wetland (LNR) is located on part of the site.","https://magic.defra.gov.uk/MagicMap.aspx","Visit Chesterfield","Brearley Wetlands is was designated as a Local Nature Reserve because of the rare invertebrates that are found there. Brearley Wetlands is a good place to spot butterflies and migrating birds. Habitats include wet grassland, hedgerows and scrub.","https://www.visitchesterfield.info/things-to-do/brearley-park-wetlands-nature-reserve-p679531"]
[null,"WwTWs",10,"m",null,null,null,null,null,"L","The WwTWs is a very large operation and would be able  treat any reasonably foreseeable spill without major disruption to operations given immediate response to clean up."]
[null,"Chesterfield Canal",215,"m",null,null,null,null,null,"L","The Chesterfield Canal runs c. 215m to the east of the installation, also flowing to the north.\nThe Chesterfield Canal, adjacent to the River Rother is situated within the 'Rother, Spittle Brook to Doe Lea' waterbody, part of the 'Rother and Doe Lea' operational catchment. This waterbody has an overall WFD classification of 'Moderate', with an ecological status of 'Moderate' and  a chemical status of 'Good'.  \nThe Canal will transport any contaminants that enter the canal through surface water runoff, groundwater flow and other potential receptors downstream. Adjacent to the WwTW, there is a local nature reserve located in the area between the River Rother and the Chesterfield Canal. This is also an area of deciduous woodland and broadleaved forest. The wider area falls within a nitrate vulnerable zone.\nAs the  Canal is beyond the River Rother, it is unlikely to be affected by any pollution therefore a Low Environmental Hazard Rating has been selected. ","Derbyshire County Council                Catchment Data Explorer (CDE)","Mitigation Measures Assessment, Macrophytes, Fish and Invertebrates are reasons for the waterbody failing to meet 'Good' ecological status. \n\nThe Chesterfield Canal waterway close to Chesterfield with historical, leisure and biological value. The canal towpath is multi-user for walking, cycling and wheelchair users. There are also regular boat trips and fishing.       ","https://environment.data.gov.uk/catchment-planning/WaterBody/GB104027057771","Catchment Data Explorer (CDE)","The Chesterfield Canal waterway close to Chesterfield with historical, leisure and biological value. The canal towpath is multi-user for walking, cycling and wheelchair users. There are also regular boat trips and fishing.  ","https://www.derbyshire.gov.uk/leisure/countryside/countryside-sites/waterways-wetlands/chesterfield-canal.aspx "]
[null,null,null,null,null,null,null,null,"Water Overall Rating","H","Justification: The River Rother/ Whitting has a High Environmental Hazard Rating"]
[null,"Habitation"]
[null,"Industry",100,"m",null,null,null,null,null,"L","There are fifteen active Contemporary Trade Directory Entries within 250m. A number of these relate to Station Lane Industrial Estate, c. 100m to the north west of the installation at its nearest point, and include manufacturing, engineering and automotive based activities. "]
[null,"Railway ",200,"m",null,null,null,null,null,"L","There is a railway located  close to the site.  A Low Environmental Hazard Rating has been selected as 3D modelling has been completed for Old Whittington STF that identifies no sludge would leave site during catastrophic tank failure."]
[null,"Residences",190,"m",null,null,null,null,null,"L","Residential properties 190m and 220m north of the sludge screen feed tank and 240m south west of the cake pad;"]
[]
[null,null,null,null,null,null,null,null,"Habitation Overall Rating","L","Justification: All the receptors are Low Environmental Hazard Rating"]
[null,"Other"]
[null,null,null,null,null,null,null,null,"Other Overall Rating","L","Justification: All of the above are Low Environmental Hazard Rating"," "]
[]
[]
[null,null,null,null,null,null,null,null,"Receptors Overall Hazard Rating",{"$f":"IF(OR(J14=\"H\",J20=\"H\",J22=\"H\"),\"H\",IF(OR(J14=\"M\",J20=\"M\",J22=\"M\"),\"M\",\"L\"))","v":"H"},null,"  "," "]
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["H"]
["M"]
["L"]

{"sheet":"2) Site Hazard Rating","index":6,"n_rows":106,"n_cols":5,"rows_kept":106,"cut":false,"hidden":false,"merged":[[12,1,12,3],[3,1,3,4]]}
[]
[]
[]
[null,"Calculated hazard ratings:"]
[null,"Source","Pathway","Receptor","Site Hazard Rating"]
[null,{"$f":"'1) a) Source'!J34","v":"H"},{"$f":"'1) b) Pathway'!J41","v":"M"},{"$f":"'1) c) Receptors'!J25","v":"H"},{"$f":"IF(E106<6,\"Low\",IF(E106<10,\"Medium\",\"High\"))","v":"High"}]
[]
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[]
[null,"Possible Combination",null,null,"Site Hazard Rating"]
[null,"L","L","L","Low"]
[null,"M","M","L","Low"]
[null,"H","L","L","Low"]
[null,"M","M","M","Medium"]
[null,"H","M","L","Medium"]
[null,"H","H","L","Medium"]
[null,"H","M","M","High"]
[null,"H","H","M","High"]
[null,"H","H","H","High"]
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[null,"Rating lookup table"]
[null,"L",1]
[null,"M",2]
[null,"H",3]
[]
[null,"This assessment score"]
[null,{"$f":"VLOOKUP(B6,B101:C103,2,FALSE)","v":3},{"$f":"VLOOKUP(C6,B101:C103,2,FALSE)","v":2},{"$f":"VLOOKUP(D6,B101:C103,2,FALSE)","v":3},{"$f":"B106*C106*D106","v":18}]

{"sheet":"3) Likelihood","index":7,"n_rows":309,"n_cols":9,"rows_kept":309,"cut":false,"hidden":false,"merged":[[249,1,261,1],[249,3,261,3],[249,4,261,4],[249,5,261,5],[35,1,48,1],[35,3,48,3],[35,4,48,4],[35,5,48,5],[49,1,61,1],[49,3,61,3],[49,4,61,4],[49,5,61,5],[62,1,75,1],[62,3,75,3],[62,4,75,4],[62,5,75,5],[103,1,115,1],[103,3,115,3],[103,4,115,4],[103,5,115,5],[116,1,129,1],[116,3,129,3],[116,4,129,4],[116,5,129,5],[20,6,20,7],[22,1,34,1],[22,3,34,3],[22,4,34,4],[22,5,34,5],[76,1,88,1],[76,3,88,3],[76,4,88,4],[76,5,88,5],[89,1,102,1],[89,4,102,4],[89,5,102,5],[89,3,102,3],[222,1,234,1],[222,3,234,3],[222,4,234,4],[222,5,234,5],[235,1,248,1],[235,3,248,3],[235,4,248,4],[235,5,248,5],[196,5,208,5],[209,1,221,1],[209,3,221,3],[209,4,221,4],[209,5,221,5],[130,4,142,4],[157,1,169,1],[157,3,169,3],[157,4,169,4],[196,1,208,1],[196,3,208,3],[196,4,208,4],[130,5,142,5],[184,1,195,1],[184,3,195,3],[184,5,195,5],[143,1,156,1],[143,3,156,3],[143,4,156,4],[143,5,156,5],[157,5,169,5],[170,1,183,1],[170,3,183,3],[170,4,183,4],[170,5,183,5],[184,4,195,4],[130,1,142,1],[130,3,142,3]]}
[]
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[null,"Rational for the assessment of likelihood "]
[null,"Identification of risks is based on the individual sources of potentially polluting material (sludge tanks, etc.) and on the general site risk identified in the CIRIA guidance"]
[null,"Assessment of the unmitigated risk of emissions from each source is based on the potential for failure of any containment measures provided. "]
[null,"This considers the primary, secondary and tertiary containment associate with each source and the potential breach of these containment measures."]
[null,"The likelihood of failure is quantified, based on the guidelines provided in CIRIA 736 and Yorkshire Waters experience of containment failures on their sites. "]
[null,"Basing the quantification of containment failure on Yorkshire Water experience on their own sites therefore accounts for the Yorkshire Water design specification, making the assessment relevant to the designs. ",null,"The identification of the likelihood of the loss of containment ad subsequent release of contaminants "]
[null,"The mitigation applied to the risks considers the operational and maintenance procedures, including regular inspecting and testing of containment measures.  "]
[null,"Based on the regular inspecting and testing of containment measures it is considered that the potential for catastrophic failures would be identified prior to failure and either decommissioned and replaced (for example tanks) or repairs (e.g. pipelines)"]
[]
[]
[]
[]
[]
[null,"Risk ","Description of Risk","UNMITIGATED LIKELIHOOD \n","Mitigation applied","MITIGATED LIKELIHOOD",null,"Low","Site Overall Likelihood"]
[null,"Sludge import screen tank\n\n183 m3 working volume\n\nSpillage of non hazardous sludge: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","Containment:\n - Steel tank construction. Constructed in 2011 with a 20yr minimum design life. \n - High level alarms linked to site SCADA control program and interlock to stop pumping into the tanks if high level reached. \n- High level alarms linked to site SCADA control program and activate alarm at tanker off-loading point\n- Imported sludge has audible and visual alarm\n- The sludge screen buffer tank includes a vent to atmosphere to prevent damage to the tank walls and roof during tanker unloading operations. \n- Five levels of discharge for raw sludge, each with visual inspection and sampling\n- Physical property of sludge is slow flowing suspension and relatively immobile. This limits the risk of sludge flowing to off-site receptors and facilitates clean-up if a spill was to happen. \n- Run-off from sludge areas returned to STW flow. Clean water discharged to surface water drain or soakaway\n- The tank is surrounded by impermeable hardstanding which drainages to the inlet pumping station which would return spills for treatment. Roads and turnings should also be impermeable concrete.","M"," - Tanks visually inspected weekly. \n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Assets are subject to non destructive testing (NDT).  The schedule for this is determined by the age of the asset and the findings of previous asset inspections.  Where problems are identified, they are rectified to ensure that the tank remains safe for continued operation.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for tank failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n - All link seals are appropriately treated and grouted.  \n - In the  event of overflow of contaminants it is possible that sludge could flow across paved areas to grassed /stones areas. If this occurs then YW will react with an emergency spill response and clean up the area that has been contaminated. \n\n\n\n\n\n\n\n\n\n\n","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tank is relatively new and of relatively low volume. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Based on the CIRIA risk criteria for steel tanks, the potential is therefore considered medium."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low. The high-level overflow also drains into the site drainage system and is then returned to the head of the works. "]
[null,null,"- Potential for minor leakage around pipe flanges, particularly at the outlet pipework connection as this is below ground. Emission due to leaks is therefore considered medium."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the import tank. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tank is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the tank is vented so flammable gasses would not build up in the tank.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tank constructed in 2011 with a minimum design life of 20 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the tank is low relative to other structures within the are therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the imported sludge buffer tank and sludge screens\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves and screens are made from steel\n-Sludge screen feed pipe and screened sludge pipe are above ground and over impermeable surfacing that falls to the site drainage\n-Sludge screens are contained within a water-tight trough situated over impermeable surfacing that falls to the site drainage\n-Screened sludge below ground pump station is constructed of concrete and the above transfer tank are surrounded by hardstanding that drains into site drainage system and onwards to the head of the works\n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.","M"," - Pipework visually inspected weekly. \n - Pipework is lagged to prevent freezing\n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Non Destructive Testing is carried out every 5 years on all ancillary assets. \n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for pipework failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n  ","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework would be emitted to ground. As there is no pipework below ground,  the risk of emission due to leaks is therefore considered to be low. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps - Any sudden loss of pressure related to a catastrophic pipe failure would be identified by the site SCADA system resulting all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered medium. "]
[null,null,"- Shortcomings or failure in operational control system: The site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Possibility of failure of screen housing leading to release of sludge, overfilling of sludge screen housing or Screened Liquid Sludge Pump station and Transfer Tank. Due to the significant flow of sludge through these process items the risk of emission of sludge is considered medium"]
[null,null,"- Abuse - All site staff and tanker operators are trained to operate the import tank. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low "]
[null,null,"- Impact -  The pipework is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the pipework is within the fenced and gated site, monitored via security surveillance.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the pipework is not routed along areas of potential flammable atmosphere. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The pipework was installed in 2011 with a minimum design life of 25 years. They are regularly monitored to check for leakages and material failure. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the pipework is low relative to other structures within the area therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Drum thickener feed tanks \n\n2 x 1,600 m3\nworking volumes\n\nSpillage of non hazardous sludge: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","\nContainment:\n - Steel tank construction. Constructed in 2013 with a 20yr minimum design life. \n - High level alarms linked to site SCADA control program and interlock to stop pumping into the tanks if high level reached. \n- The site is designed to drain towards the site centre, away from identified Receptors. \n- The tank is surrounded by impermeable hardstanding which drains to the inlet pumping station which would return spills for treatment","M"," - Tanks visually inspected weekly. \n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Assets are subject to non destructive testing (NDT).  The schedule for this is determined by the age of the asset and the findings of previous asset inspections.  Where problems are identified, they are rectified to ensure that the tank remains safe for continued operation.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for tank failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n - All link seals are appropriately treated and grouted.  \n - In the  event of overflow of contaminants it is possible that sludge could flow across paved areas to grassed /stones areas. If this occurs then YW will react with an emergency spill response and clean up the area that has been contaminated. \n\n\n\n\n\n\n\n\n\n\n","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tanks are new and of relatively low volume. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Based on the CIRIA risk criteria for steel tanks, the potential is therefore considered medium."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low. The high-level overflow also drains into the site drainage system and is then returned to the head of the works. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tanks are protected kerbs between the tank and site road access. Likelihood of emissions due to impacts medium"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the tank is vented so flammable gasses would not build up in the tank.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tanks constructed in 2013 with a minimum design life of 20 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the tanks are low relative to other structures within the are therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the drum thickener feed tanks\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves and screens are made from steel\n-Thickener feed pipe and thickened sludge pipe are above ground and over impermeable surfacing that falls to the site drainage\n-Sludge thickeners are contained within a water-tight trough situated over impermeable surfacing that falls to the site drainage\n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.","M"," - Pipework visually inspected weekly. \n - Pipework is lagged to prevent freezing\n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Non Destructive Testing is carried out every 5 years on all ancillary assets. \n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for pipework failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n  ","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework would be emitted to ground. The pipes are built with secondary containment with the pipework set in the concrete base of the tanks.  This is designed and maintained to the Yorkshire Water specifications. The risk of emission due to leaks is therefore considered to be low. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps - Any sudden loss of pressure related to a catastrophic pipe failure would be identified by the site SCADA system resulting all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered medium. "]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse - All site staff and tanker operators are trained to operate the import tank. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low "]
[null,null,"- Impact - the pipework is protected hightened by bollards and has kerbs between the pipes and site road. Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the pipework is within the fenced and gated site, monitored via security surveillance.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the pipework is not routed along areas of potential flammable atmosphere. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The pipework was installed in 2013 with a minimum design life of 25 years. They are regularly monitored to check for leakages and material failure. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the pipework is low relative to other structures within the area therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Digester feed tanks\n\n2x 463 m3 working volume\n\nSpillage of non hazardous sludge: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","Containment:\n- Glass lined steel tank construction. Constructed in 2011 with a 20 year minimum design life. \n- Both tanks also function as thickened imported sludge reception tanks.\n- High level alarms linked to site SCADA control program and interlock to stop pumping into the tanks if high level reached. \n- Physical property of sludge is slow flowing suspension and relatively immobile. This limits the risk of sludge flowing to off-site receptors and facilitates clean-up if a spill was to happen. \n- The site is designed to drain towards the site centre, away from identified Receptors. \n- The tank is surrounded by impermeable hardstanding which drainages to the inlet pumping station which would return spills for treatment","M"," - Tanks visually inspected weekly. \n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Assets are subject to non destructive testing (NDT).  The schedule for this is determined by the age of the asset and the findings of previous asset inspections.  Where problems are identified, they are rectified to ensure that the tank remains safe for continued operation.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for tank failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n - All link seals are appropriately treated and grouted.  \n - In the  event of overflow of contaminants it is possible that sludge could flow across paved areas to grassed /stones areas. If this occurs then YW will react with an emergency spill response and clean up the area that has been contaminated. \n\n\n\n\n\n\n\n\n\n\n","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tanks are new and of relatively low volume. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Based on the CIRIA risk criteria for steel tanks, the potential is therefore considered medium."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low. The high-level overflow also drains into the site drainage system and is then returned to the head of the works. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to practice standard operating practices for sludge importing. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tank is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the tank is vented so flammable gasses would not build up in the tank.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tank constructed in 2011 with a minimum design life of 20 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Lightning risk assessment has been carried out on site. Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the digester feed tanks\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves and screens are made from steel\n- Pipework is above ground and over impermeable surfacing that falls to the site drainage. \n- Frost and accidental protection where practical (all pipes 150 mm and below should have lagging and trace heating)\n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.\n- Straight runs and sweeping bends rather than curves","M"," - Pipework visually inspected weekly. \n - Pipework is lagged to prevent freezing\n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Non Destructive Testing is carried out every 5 years on all ancillary assets. \n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for pipework failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n  ","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework would be emitted to ground. The pipes are build with secondary containment with the pipework set in the concrete base of the tanks.  This is designed and maintained to the Yorkshire Water specifications. The risk of emission due to leaks is therefore considered to be low. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps - Any sudden loss of pressure related to a catastrophic pipe failure would be identified by the site SCADA system resulting all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered low. "]
[null,null,"- Shortcomings or failure in operational control system: The site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. The risk of emission of sludge is considered low"]
[null,null,"- Abuse - All site staff and tanker operators are trained to operate the plant items. HAZOP studies have been undertaken as part of the design process. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low "]
[null,null,"- Impact -  The pipework located safely away from site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the pipework is within the fenced and gated site, monitored via security surveillance.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the pipework is not routed along areas of potential flammable atmosphere. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site. The pipework was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The pipework was installed in 2011 with a minimum design life of 25 years. They are regularly monitored to check for leakages and material failure. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the pipework is low relative to other structures within the area therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Digesters\n\n2x 2,300 m3 \n\nSpillage of non hazardous sludge: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","Containment:\n - Epoxy coated steel tank construction. Installed in 2013 with a 20yr minimum design life.   \n - High level alarms linked to site SCADA control program and interlock to stop pumping into the tanks if high level reached. Foam radar present.\n- The site is designed to drain towards the site centre, away from identified Receptors. \n- The tank is surrounded by impermeable hardstanding which drains  to the inlet pumping station which would return spills for treatment.","M"," - Tanks visually inspected weekly. \n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Assets are subject to non destructive testing (NDT).  The schedule for this is determined by the age of the asset and the findings of previous asset inspections.  Where problems are identified, they are rectified to ensure that the tank remains safe for continued operation.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for tank failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n - All link seals are appropriately treated and grouted.  \n - In the  event of overflow of contaminants it is possible that sludge could flow across paved areas to grassed /stones areas. If this occurs then YW will react with an emergency spill response and clean up the area that has been contaminated. \n\n\n\n\n\n\n\n\n\n\n","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tanks are within its minimum design life and contain significant volume of sludge. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Based on the CIRIA risk criteria for steel tanks, the potential is therefore considered medium."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the digesters. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tank is protected by fencing between the tank and low-speed site road, including perimeter fencing (access is restricted within the digester compound).  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the tank is open topped so flammable gasses would not build up in the tank.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tank constructed in 2019 with a minimum design life of 20 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Lightning protection risk assessment has been undertaken in 2018.  Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the digesters\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves are made from steel and single-skinned.\n- Where external and less than 150 NB, pipework is trace-heated and lagged.\n- Digester inlet and outlet pipework, recirculation pipework are all above ground and over impermeable surfacing that falls to the site drainage\n- Tank drain pipework exits below the tank and runs partially below ground. This pipework is only used during drain down operations.\n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.","M"," - Pipework visually inspected weekly. \n - Pipework is lagged to prevent freezing\n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Non Destructive Testing is carried out every 5 years on all ancillary assets.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for pipework failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n  ","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework would be emitted to ground. The pipes are build with secondary containment with the pipework set in the concrete base of the tanks. Only drain pipework is routed below ground and will only be used for maintenance purposes. The risk of emission due to leaks is therefore considered to be low. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps - Any sudden loss of pressure related to a catastrophic pipe failure would be identified by the site SCADA system resulting all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered low. "]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the import tank. HAZOP studies have been undertaken as part of the design process. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - The tanks are protected by road kerbs and access is restricted within the digester compound.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - The tanks are designed to generate biogas, a mix of methane and carbon dioxide.  Under normal operating conditions, this mix is not flammable.  A DSEAR assessment has been completed and compliant equipment installed in areas where abnormal conditions have potential to create a flammable atmosphere. Likelihood of emissions due to fire or explosion is low."]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site. The tanks were designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Pipes were installed in 2013 with a minimum design life of 50 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Lightning protection risk assessment carried out and lightning protection installed if required. Likelihood of emissions due to lightning is low."]
[null,"Dewatering feed tanks \n\n1 x 623 m3\n1 x 835 m3 \nworking volumes\n\nSpillage of non hazardous sludge: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","Containment:\n- Glass lined steel tank construction. Tank no. 1 was constructed in 2009 whilst tank no. 2 was constructed in 2012 with a 20 yr minimum design life.\n - High level alarms linked to site SCADA control program and interlock to stop pumping into the tanks if high level reached. \n - The tank is open-topped and not susceptible to over-pressure. \n- The site is designed to drain towards the site centre, away from identified Receptors. \n- The tank is surrounded by impermeable hardstanding (reinforced concrete not rolled-compacted) which drains to the inlet pumping station which would return spills for treatment.","M"," - Tanks visually inspected weekly. \n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Assets are subject to non destructive testing (NDT).  The schedule for this is determined by the age of the asset and the findings of previous asset inspections.  Where problems are identified, they are rectified to ensure that the tank remains safe for continued operation.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for tank failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n - All link seals are appropriately treated and grouted.  \n - In the  event of overflow of contaminants it is possible that sludge could flow across paved areas to grassed /stones areas. If this occurs then YW will react with an emergency spill response and clean up the area that has been contaminated. \n\n\n\n\n\n\n\n\n\n\n","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tank is new and of relatively low volume. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Based on the CIRIA risk criteria for steel tanks, the potential is therefore considered medium."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low. The high-level overflow also drains into the site drainage system and is then returned to the head of the works. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tank is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the tank is open topped so flammable gasses would not build up in the tank.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tanks constructed in 2009 and 2012 with a minimum design life of 20 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Lightning risk assessment has been carried out on site.  Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the dewatering feed tanks\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves are made from steel and single-skinned\n- Dewatering feed tank inlet pipework are above ground and over impermeable surfacing that falls to the site drainage\n- Dewatering feed tank outlet pipework exits below the tank and runs a short distance below ground. This continues above ground where it is on impermeable surfacing that falls to the dewatering site drainage. \n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.","M"," - Pipework visually inspected weekly. \n - Pipework is lagged to prevent freezing\n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Non Destructive Testing is carried out every 5 years on all ancillary assets. \n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for pipework failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n  ","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework would be emitted to ground. The outlet from the tank runs a short distance below ground and is not secondary contained.  This is designed and maintained to the Yorkshire Water specifications. The risk of emission due to leaks is therefore considered to be medium. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps - Any sudden loss of pressure related to a catastrophic pipe failure would be identified by the site SCADA system resulting in all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered medium. "]
[null,null,"- Shortcomings or failure in operational control system: The site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Possibility of failure of screen housing leading to release of sludge, overfilling of sludge screen housing or Screened Liquid Sludge Pump station and Transfer Tank. Due to the significant flow of sludge through these process items the risk of emission of sludge is considered medium"]
[null,null,"- Abuse - All site staff and tanker operators are trained to operate the import tank. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low "]
[null,null,"- Impact -  The pipework  is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the pipework is within the fenced and gated site, monitored via security surveillance.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the pipework is not routed along areas of potential flammable atmosphere. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The pipework was installed in 2009 with a minimum design life of 25 years. They are regularly monitored to check for leakages and material failure. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the pipework is low relative to other structures within the area therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Liquors return buffer tank\n\n1 x 494 m3\nworking volume\n\nSpillage of non hazardous sludge: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","Containment:\n- Steel tank construction. Constructed in 2012 with a 20 yr minimum design life.\n - High level alarms linked to site SCADA control program and interlock to stop pumping into the tanks if high level reached. \n - The tank is open-topped and not susceptible to over-pressure. \n- The site is designed to drain towards the site centre, away from identified Receptors. \n- The tank is surrounded by impermeable hardstanding (reinforced concrete not rolled-compacted) which drains to the inlet pumping station which would return spills for treatment.","M"," - Tanks visually inspected weekly. \n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Assets are subject to non destructive testing (NDT).  The schedule for this is determined by the age of the asset and the findings of previous asset inspections.  Where problems are identified, they are rectified to ensure that the tank remains safe for continued operation.\n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for tank failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n - All link seals are appropriately treated and grouted.  \n - In the  event of overflow of contaminants it is possible that sludge could flow across paved areas to grassed /stones areas. If this occurs then YW will react with an emergency spill response and clean up the area that has been contaminated. \n\n\n\n\n\n\n\n\n\n\n","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tank is new and of relatively low volume. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Based on the CIRIA risk criteria for steel tanks, the potential is therefore considered medium."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low. The high-level overflow also drains into the site drainage system and is then returned to the head of the works. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tank is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the tank is open topped so flammable gasses would not build up in the tank.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tanks constructed in 2012 with a minimum design life of 20 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Lightning risk assessment has been carried out on site.  Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the liquors return buffer tank\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves are made from steel and single-skinned\n- Dewatering feed tank inlet pipework are above ground and over impermeable surfacing that falls to the site drainage\n- Dewatering feed tank outlet pipework exits below the tank and runs a short distance below ground. This continues above ground where it is on impermeable surfacing that falls to the dewatering site drainage. \n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.","M"," - Pipework visually inspected weekly. \n - Pipework is lagged to prevent freezing\n - TCM checks are conducted regular and visually inspected weekly. \n - Site is manned 7am to 4pm hours Mon to Friday, with standby cover respondent to alarms after 4pm. For Sat and Sun standby cover is available between 7am to 7pm for any alarms or issues.\n - Non Destructive Testing is carried out every 5 years on all ancillary assets. \n - Daily site task instruction ensures the areas of the site are inspected for any environmental or process risks. \n - The EMS contains procedures for pipework failures.\n - Minor to moderate spills will be cleaned up before there has been sufficient time for infiltration into the ground. \n  ","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework would be emitted to ground. The outlet from the tank runs a short distance below ground and is not secondary contained.  This is designed and maintained to the Yorkshire Water specifications. The risk of emission due to leaks is therefore considered to be medium. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps - Any sudden loss of pressure related to a catastrophic pipe failure would be identified by the site SCADA system resulting in all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered medium. "]
[null,null,"- Shortcomings or failure in operational control system: The site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Possibility of failure of screen housing leading to release of sludge, overfilling of sludge screen housing or Screened Liquid Sludge Pump station and Transfer Tank. Due to the significant flow of sludge through these process items the risk of emission of sludge is considered medium"]
[null,null,"- Abuse - All site staff and tanker operators are trained to operate the import tank. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low "]
[null,null,"- Impact -  The pipework  is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the pipework is within the fenced and gated site, monitored via security surveillance.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the pipework is not routed along areas of potential flammable atmosphere. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The pipework was installed in 2012 with a minimum design life of 25 years. They are regularly monitored to check for leakages and material failure. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - the pipework is low relative to other structures within the area therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[null,"Digested Cake Pad\n\n15,000 tonnes max capcity\n\nEmission of sludge solids from the conditioning pads\nLeaching of liquors to groundwater","Containment:\n- Dewatered digested sludge cake is stored in windrows, on impermeable concrete surface but without roof to protect from rainfall.\n- A site excavator is used to load sludge cake into the haulage vehicles, which can result in sludge cake being tracked out of the area. \n- The site roads and barn are separated by a narrow strip of grassed area, with fencing and concrete walling.\n- Surface run off from slab drains to the inlet pumping station .","L","N/A","L"]
[null,null,"Failure risk:"]
[null,null,"Catastrophic containment failure - The sludge cake is dewatered but susceptible to rewetting from rainfall. The risk of emission to ground is therefore considered to be low. It must be noted that the digested sludge cake is mostly free from pathogen and commonly used as soil conditioner (safe to environment). Surface run-off from the conditioning slab is directed to a wet well which transfers any leached liquors to the return liquors pumping station and then back to the main WwTW for treatment."]
[null,null,"Spreading of sludge cake from the storage barn - Limited sludge would be tracked onto site roads and would be contained by the site drainage system The risk of emissions is therefore low. "]
[null,null,"Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"Abuse - all site staff and relevant tanker operators are trained to follow standard operating procedures. Sludge cake is generally immobile. Likelihood of emissions due to abuse is low"]
[null,null,"Impact -  The sludge cake is generally immobile and therefore any impact will not result in loss of containment. Likelihood of emissions due to impacts low"]
[null,null,"Vandalism, etc. - the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"Fire, explosion - The area well ventilated and no risk of flammable atmosphere forming.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site. The slab was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"Ageing - The slab area was constructed in 2010 and is subject to regular inspection for condition. Likelihood of emissions due to age is low"]
[null,null,"Lightning strike - Sludge cake is a generally immobile substance. Any impact from a lightning strike, which is not considered likely to occur in this area, will not result in loss of containment. Likelihood of emissions due to lightning is low"]
[null,"Polyelectrolyte Storage \n\n1 x 1 m3\n\n(Neat Liquid for Thickening)\n\n\nEmission of polymer (powder, liquid and make-up) from tank\nLeaching of polymer to groundwater","Containment:\n - Polyelectrolyte is used to treat the sludge prior to thickening.  \n - Liquid polyelectrolyte is delivered to site and loaded into a GRP bulk storage tank and bunded as per YW asset standards.  \n - Spillage of polymer liquid will be contained within the polymer handling area and it will not spread further.  ","L","N/A","L"]
[null,null,"Failure risk:"]
[null,null,"- Catastrophic containment failure - Polymer is stored in a bulk storage tank and pumped into the make-up system, which is within its minimum design life, where it is diluted. The make-up tank is relatively low volume. The potential is therefore considered low."]
[null,null,"- Tank overflow or leaks - Due to level monitors and the interlock on feed pumps. The risk of overflow is low. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"- Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse - All site staff are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact -  The polymer plant is located inside a building, safe from impact .  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - There is no risk of flammable atmosphere formation in this area.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site. The polymer plant building was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The polymer plant was installed in 2014  with a minimum design life of 30 years for the tank. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike -Lightning risk assessment has been carried out on site.  Likelihood of emissions due to lightning is low"]
[null,"Polyelectrolyte Storage\n\n2 x 2.6 m3\n(Powder Poly for Dewatering)\n\n\nEmission of polymer (powder and make-up) from tank\nLeaching of polymer to groundwater","Containment:\n - Polyelectrolyte is used to treat the sludge prior to dewatering.  \n - Polyelectrolyte stored in GRP silos and bunded as per YW asset standards.  \n - Spillage of polymer powder/liquid will be contained within the polymer handling area and it will not spread further.  ","L","N/A","L"]
[null,null,"Failure risk:"]
[null,null,"- Catastrophic containment failure - Powder polymer is stored in big-bag and emptied into the make-up system, which is within its minimum design life, where it is diluted. The make-up tank is relatively low volume. The potential is therefore considered low."]
[null,null,"- Tank overflow or leaks - Due to level monitors and the interlock on feed pumps. The risk of overflow is low. "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"- Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse - All site staff are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on feed pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact -  The polymer plant is located inside a building, safe from impact .  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - There is no risk of flammable atmosphere formation in this area.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site. The polymer plant building was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The polymer plant was installed in 2008 with a minimum design life of 30 years for the tank. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Site wide lightning conductor remedial works undertaken in 2017.  Likelihood of emissions due to lightning is low"]
[null,"Odour control units\n\nSpillage of odour control media: \n - catastrophic failure of tank\n - tank overflow or\n - tank leaks.","Containment:\n - Plastic tank construction. Constructed in 2011 with a 30 year minimum design life. \n- The site is designed to drain towards the site centre, away from identified Receptors. \n- The tank is surrounded by impermeable hardstanding which drains to the inlet pumping station which would return spills for treatment","L","N/A","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic tank failure - The tank is new and of relatively low volume. Yorkshire Water have never experienced catastrophic failure of steel tanks built and maintained to the YWS specifications.  Due to the operation and age of the tanks, the potential is therefore considered low."]
[null,null," - Tank overflow or leaks - Due to level monitors and the interlock on feed pumps, the risk of overflow is low.  "]
[null,null,"- Potential for minor leakage around pipe flanges, where they enter and exit the tank, however these would be contained by the impermeable surfacing and drainage. Emission due to overflow or leaks is therefore considered low."]
[null,null,"-Shortcomings or failure in operational control system: the site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. Likelihood of emissions due to operational failure is low"]
[null,null,"- Abuse -all site staff and tanker operators are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on pumps. Likelihood of emissions due to abuse is low"]
[null,null,"- Impact - the tank is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. -the STF and WwTW are within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - No risk of flammable atmosphere created in these tanks.  Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - Tank constructed in 2011 with an minimum design life of 30 years. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike -Lightning risk assessment has been carried out on site.  Likelihood of emissions due to lightning is low"]
[null,"Pipework associated with the odour control\n\n - Spillage of non hazardous sludge: catastrophic failure and leaks from pipework.","Containment: \n- All pipelines, valves and screens are made from plastic (polypropylene)\n- Isolation valves are present at each end of pipe sections. This allows the isolation of leaking or failed pipe sections and limits the volume released.","L","N/A","L"]
[null,null,"Failure risk:"]
[null,null," - Catastrophic pipe failure - Following pressure testing the potential for catastrophic failure is considered low."]
[null,null," - Leaks from over ground pipework -  Leaks from over ground pipework - Pipes are pressure tested when installed and regularly checked for leaks once in operation.  Any leaks would be contained by the site drainage. the potential for emission is therefore considered low.  "]
[null,null," - Leaks from underground pipework - There are no below ground pipework. The risk of emission due to leaks is therefore considered to be low. "]
[null,null,"- Catastrophic failure of pipe joints and flanges, particularly downstream of the pumps would be identified by the site SCADA system resulting all pumping being stopped and an alarm on the site SCADA system, therefore reducing any emissions. Likelihood of emissions due to catastrophic pipe failure is considered low. "]
[null,null,"- Shortcomings or failure in operational control system: The site is maintained inline with a proactive maintenance schedule and the EMS to ensure ongoing operation of all plant items. Operators are trained in the running of plant items. The risk of emission of OCU scrubbing water is considered low"]
[null,null,"- Abuse - All site staff and tanker operators are trained to operate the plant items. No risk of overflow, due to level monitors and the interlock on  pumps. Likelihood of emissions due to abuse is low "]
[null,null,"- Impact -  The pipework  is protected by bollards between the tank and tanker unloading point and site road.  Likelihood of emissions due to impacts low"]
[null,null,"- Vandalism, etc. - the pipework is within the fenced and gated site, monitored via security surveillance.  Likelihood of emissions due to vandalism is  low"]
[null,null,"- Fire, explosion - the pipework is not routed along areas of potential flammable atmosphere. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - There has been no evidence of wider geotechnical issues during the time the WwTW has been operational on the site.  the tank was designed with geotechnical design input.  Likelihood of emissions due to Geological issues is low"]
[null,null,"- Ageing - The pipework was installed in 2011 with an minimum design life of 30 years. They are regularly monitored to check for leakages and material failure. Likelihood of emissions due to age is low"]
[null,null,"- Lightning strike - Lightning risk assessment has been carried out on sit.  Likelihood of emissions due to lightning is low"]
[null,"Lubricating Oil Storage\n\nStored in small containers i.e. <50 litre drums \n\nEmission of hazardous substance\nLeaching to groundwater","Containment:\n- Very small amounts of oil stored onsite and compliance against Control of Pollution (Oil Storage) (England) Regulations 2001.","L","N/A","L"]
[null,null,"Failure risk:"]
[null,null,"- Catastrophic tank failure - N/A"]
[null,null," - Tank overflow or leaks -  N/A"]
[null,null,"- Potential for minor leakage around pipe flanges, N/A"]
[null,null,"- Operational failures -  Operators are trained in the running of the plant items. Likelihood of emissions due to operational failure is low."]
[null,null,"- Abuse - N/A"]
[null,null,"- Impact -  The containers are either stored within a building or sited away from vehicle traffic. Likelihood of emissions due to impacts low."]
[null,null,"- Vandalism, etc. - The STF is within a fenced and gated site, with access to the site control by security.  Likelihood of emissions due to vandalism is low"]
[null,null,"- Fire, explosion – DSEAR assessment has been carried out in the CHP area. Likelihood of emissions due to fire or explosion is low"]
[null,null,"- Geological factors - N/A"]
[null,null,"- Ageing – N/A"]
[null,null,"- Lightning strike - the plant items are low relative to other structures within the are therefore unlikely to be struck by lightning.  Likelihood of emissions due to lightning is low"]
[]
[]
[]
[null,"Risk","Examples of mitigation options","Reduction in likelihood","Detail of measures"]
[null,1,"Operational Failures"]
[null,null,"The team will carry out periodic design reviews and a comprehensive HAZOP involving all the designers (process, civil, drainage, electrical) to ensure primary containment failure risk is very low. In addition operator training will be strengthened with detailed standard operating procedures.",-2,"(Taken from consultant's HAZOP report, for example)"]
[null,null,"Maintenance programme in place",-1]
[null,null,"Audit process in place",-1]
[]
[null,2,"Shortfalls in design"]
[null,null,"Plant control will be assessed at the HAZOP stage",-2]
[null,null,"No outlets below normal liquid level",-1]
[]
[null,3,"Structural failure – materials, components, detailing, corrosion or when exposed to heat and flame"]
[null,null,"Pre-cast concrete tank",-2]
[null,null,"Tank design has no history of failure",-1]
[null,null,"Tank failure risk assessment completed?",-1]
[null,null,"Steel valves",-1]
[null,null,"Structures will be built to British Standards with contractors that work under ISO9000",-1]
[]
[null,4,"Abuse – inappropriate change of use or other misuse"]
[null,null,"Change control procedure in place with sign off from competent personnel in applicable disciplines",-2]
[]
[null,5,"Vehicle impact"]
[null,null,"Armco crash barriers around tank",-2]
[null,null,"Tanks in bund not accessible by vehicles",-2]
[null,null,"Restricted vehicular access to site",-1]
[]
[null,6,"Vandalism, terrorism, force majeure etc"]
[null,null,"lockable valves on outlets (that are locked when not in use by procedure)",-1]
[null,null,"automatic and manual shut off valves",-1]
[null,null,"The site will include fencing where access is open to public",-1]
[null,null,"Passive CCTV system",-1]
[null,null,"Monitored CCTV with motion detection and warning signs",-2]
[]
[null,7,"Fire or explosion"]
[null,null,"DSEAR assessment completed",-2]
[null,null,"Control of ignition sources on site",-1]
[]
[null,8,"Geological factors -subsidence etc"]
[null,null,"Site investigations will be provided to the civil contractor for the design of the foundations",-1]
[]
[null,9,"Ageing or deteriorating assets/sub-components."]
[null,null,"Ageing/deterioration factored into plant design",-1]
[]
[null,10,"Lightning strike"]
[null,null,"Catenary or multiple lightning conductors supplied by specialists",-1]

{"sheet":"4) Site Risk and Classification","index":8,"n_rows":95,"n_cols":11,"rows_kept":95,"cut":false,"hidden":false,"merged":[]}
[]
[]
[]
[]
["Activity","Site Hazard Rating","Likelihood","Overall Site Risk Rating","Indicated Class of Secondary Containment Required"]
["Site - overall summary score",{"$f":"'2) Site Hazard Rating'!E6","v":"High"},"Low",{"$f":"IF(D95<3,\"Low\",IF(D95<5,\"Medium\",\"High\"))","v":"Medium"},{"$f":"IF(D6=\"Low\",\"Class 1\",IF(D6=\"Medium\", \"Class 2\",\"Class 3\"))","v":"Class 2"}]
["Sludge import screen tank","High","Low","Medium",{"$f":"IF(D7=\"Low\",\"Class 1\",IF(D7=\"Medium\", \"Class 2\",\"Class 3\"))","v":"Class 2"}]
["Pipework associated with the imported sludge buffer tank and sludge screens","High","Low","Medium","Class 2"]
["Drum thickener feed tanks","High","Low","Medium","Class 2"]
["Pipework associated with the drum thickener feed tanks","High","Low","Medium","Class 2",null,null,null,null,null," "]
["Digester feed tanks","High","Low","Medium","Class 2"]
["Pipework associated with the digester feed tanks","High","Low","Medium","Class 2"]
["Digesters","High","Low","Medium","Class 2"]
["Pipework associated with the digesters","High","Low","Medium","Class 2"]
["Dewatering feed tanks","High","Low","Medium","Class 2"]
["Pipework associated with the centrifuge feed tanks","High","Low","Medium","Class 2"]
["liquors return buffer tank","High","Low","Medium",{"$f":"IF(D17=\"Low\",\"Class 1\",IF(D17=\"Medium\", \"Class 2\",\"Class 3\"))","v":"Class 2"}]
["Pipework associated with the liquors return buffer tank","High","Low","Medium","Class 2"]
["Digested cake pad","High","Low","Medium","Class 2"]
["Polyelectrolyte storage (thickening)","High","Low","Medium","Class 2"]
["Polyelectrolyte storage (dewatering)","High","Low","Medium","Class 2"]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
["Rating lookup table"]
["Low",1]
["Medium",2]
["High",3]
[]
[{"$f":"VLOOKUP(B6,A91:B93,2,FALSE)","v":3},{"$f":"VLOOKUP(C6,A91:B93,2,FALSE)","v":1},null,{"$f":"A95*B95","v":3}]

{"sheet":"5) Standard Containment Designs","index":9,"n_rows":129,"n_cols":8,"rows_kept":129,"cut":false,"hidden":false,"merged":[]}
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[null,null,null,null,null,null,null,{"$f":"IF('4) Site Risk and Classification'!$E$6=\"Class 1\", \"Your site needs a design based on this diagram\",\"\")","v":""}]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[null,null,null,null,null,null,null,{"$f":"IF('4) Site Risk and Classification'!$E$6=\"Class 3\", \"Your site needs a design based on this diagram\",\"\")","v":""}]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[null,"# ","Material ","When used ","How ","Why "]
[]
[]
[null,"A ","Clay ","If plentiful on site ","1m thick, sheepsfoot roller etc. ","Low cost & effective. "]
[]
[]
[null,"B ","Stabilised soil ","If soil tested and is suitable ","Sample and test to determine amount of lime, cement and depth. ","Low cost & effective when no clay on site. "]
[]
[]
[null,"C ","Bentonite matting ","If A or B not suitable ","Prepare sub, roll out and cover. ","Moderate cost. Quick & easy to lay. Tolerant of damage. "]
[]
[]
[null,"D ","Landfill liner type foil ","If A, B or C not suitable ","Prepare sub, roll out, weld and cover. "]
[]
[]
[null,"E ","Concrete ","Small areas only ","Shutter, place mesh and pour fibre reinforced.","Only if A, B, C or D not suitable. "]

{"sheet":"Sheet1","index":10,"n_rows":46,"n_cols":13,"rows_kept":46,"cut":false,"hidden":true,"merged":[]}
[]
[]
[null,null,1,null,2,null,3,null,4,null,5,null,6]
[null,null,"Ag Man",null,"Ag Man & PGC",null,"Ag Man & FW",null,"PGC & FW",null,"FW",null,"Indus & commercial inc green waste"]
[null,"Approx size typical plant +/- 50 %","150 kW",null,"500 kW",null,"1 MW",null,"1 MW",null,"1.5 MW",null,"> 2MW"]
[1,"Source"]
[null,"Farm yard manure","L"]
[null,"Slurry","L"]
[null,"Energy Crops","L"]
[null,"Energy Crop silage","M"]
[null,"Energy crop silage effluent","H"]
[null,"Food waste","-"]
[null,"Green waste","-"]
[]
[null,"Digestate","L",null,"L",null,"M",null,"M",null,"H"]
[null,"Based on vol and aquatic pollutant results"]
[]
[null,"Separated digestate solids","L"]
[null,"Separated digestate liquid","L"]
[]
[null,"Rainwater or surface water runoff contaminated by inventory","L"]
[]
[null,"Fire Fighting Agents harmful in their own right or contaminated by inventory","N/A"]
[]
[null,"Fire fighting and cooling water contaminated by inventory","N/A"]
[]
[2,"Pathway"]
[null,"Site layout and drainage"]
[]
[null,"Topography, geology and hydrology"]
[]
[null,"Climatic conditions"]
[]
[3,"Receptors"]
[null,"Groundwater","See groundwater sheet (similar to amaya's inventory sheet)"]
[]
[null,"Surface water"]
[]
[null,"Local Water Quality"]
[]
[null,"Protected areas"]
[]
[null,"Overall site hazard rating"]
[]
[]
[4,"Liklihood"]

{"sheet":"Risk Scoring","index":11,"n_rows":17,"n_cols":20,"rows_kept":17,"cut":false,"hidden":true,"merged":[[1,17,4,17],[7,11,7,14]]}
[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"Risk Rating"]
[null,"Rating",null,"Likelihood",null,null,"Consequence","incident level",null,null,null,{"$f":"L6*$P$2","v":4},{"$f":"M6*$P$2","v":8},{"$f":"N6*$P$2","v":12},{"$f":"O6*$P$2","v":16},4,"H","Consequence",null,"High"]
[null,"Very low",null,1,"up to 10%",null,1,"Category 4",null,null,null,{"$f":"L6*$P$3","v":3},{"$f":"M6*$P$3","v":6},{"$f":"N6*$P$3","v":9},{"$f":"O6*$P$3","v":12},3,"M",null,null,"Medium High"]
[null,"Low",null,2,"up to 20%",null,2,"Category 3",null,null,null,{"$f":"L6*$P$4","v":2},{"$f":"M6*$P$4","v":4},{"$f":"N6*$P$4","v":6},{"$f":"O6*$P$4","v":8},2,"L",null,null,"Medium Low"]
[null,"Medium",null,3,"up to 50%",null,3,"Category 2",null,null,null,{"$f":"L6*$P$5","v":1},{"$f":"M6*$P$5","v":2},{"$f":"N6*$P$5","v":3},{"$f":"O6*$P$5","v":4},1,"VL",null,null,"Low"]
[null,"High",null,4,"up to 70%",null,4,"Category 1",null,null,null,1,2,3,4]
[null,null,null,null,null,null,null,null,null,null,null,"VL","L","M","H"]
[null,null,null,null,null,null,null,null,null,null,null,"Likelihood"]
[]
[]
[null,"Category 1 – major, serious, persistent and/or extensive impact or effect"]
[null,"on the environment, people and/or property "]
[null,"Category 2 – significant impact or effect on the environment, people"]
[null,"and/or property "]
[null,"Category 3 – minor or minimal impact or effect on the environment, people"]
[null,"and/or property "]
[null,"Category 4 – substantiated incident with no impact."]