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3Emissions and monitoring3.1Emissions to water, air or land3.1.1There shall be no point source emissions to water, air or land except from the sources and emissionpoints listed in schedule 3 tables S3.1, S3.2 and S3.3.3.1.2The limits given in schedule 3 shall not be exceeded.3.1.3Periodic monitoring shall be carried out at least once every 5 years for groundwater and 10 years forsoil, unless such monitoring is based on a systematic appraisal of the risk of contamination.3.2Emissions of substances not controlled by emission limits3.2.1Emissions of substances not controlled by emission limits (excluding odour) shall not cause pollution.The operator shall not be taken to have breached this condition if appropriate measures, including,but not limited to, those specified in any approved emissions management plan, have been taken toprevent or where that is not practicable, to minimise, those emissions.3.2.2The operator shall:(a)if notified by the Environment Agency that the activities are giving rise to pollution, submit to theEnvironment Agency for approval within the period specified, an emissions management planwhich identifies and minimises the risks of pollution from emissions of substances not controlledby emission limits;(b)implement the approved emissions management plan, from the date of approval, unlessotherwise agreed in writing by the Environment Agency.3.2.3All liquids in containers, whose emission to water or land could cause pollution, shall be providedwith secondary containment, unless the operator has used other appropriate measures to prevent orwhere that is not practicable, to minimise, leakage and spillage from the primary container.3.3Odour3.3.1Emissions from the activities shall be free from odour at levels likely to cause pollution outside thesite, as perceived by an authorised officer of the Environment Agency, unless the operator has usedappropriate measures, including, but not limited to, those specified in any approved odourmanagement plan, to prevent or where that is not practicable to minimise the odour.3.3.2The operator shall:(a)if notified by the Environment Agency that the activities are giving rise to pollution outside thesite due to odour, submit to the Environment Agency for approval within the period specified, anodour management plan which identifies and minimises the risks of pollution from odour;(b)implement the approved odour management plan, from the date of approval, unless otherwiseagreed in writing by the Environment Agency.3.4Noise and vibration3.4.1Emissions from the activities shall be free from noise and vibration at levels likely to cause pollutionoutside the site, as perceived by an authorised officer of the Environment Agency, unless theoperator has used appropriate measures, including, but not limited to, those specified in anyapproved noise and vibration management plan to prevent or where that is not practicable tominimise the noise and vibration.Permit numberEPR/PP3003PW7

3.4.2The operator shall:(a)if notified by the Environment Agency that the activities are giving rise to pollution outside thesite due to noise and vibration, submit to the Environment Agency for approval within the periodspecified, a noise and vibration management plan which identifies and minimises the risks ofpollution from noise and vibration;(b)implement the approved noise and vibration management plan, from the date of approval,unless otherwise agreed in writing by the Environment Agency.3.5Monitoring3.5.1The operator shall, unless otherwise agreed in writing by the Environment Agency, undertake themonitoring specified in the following tables in schedule 3 to this permit:(a)point source emissions specified in tables S3.1, S3.2 and S3.3;3.5.2The operator shall maintain records of all monitoring required by this permit including records of thetaking and analysis of samples, instrument measurements (periodic and continual), calibrations,examinations, tests and surveys and any assessment or evaluation made on the basis of such data.3.5.3Permanent means of access shall be provided to enable sampling/monitoring to be carried out inrelation to the emission points specified in schedule 3 tables S3.1, S3.2 and S3.3 unless otherwiseagreed in writing by the Environment Agency.4Information4.1Records4.1.1All records required to be made by this permit shall:(a)be legible;(b)be made as soon as reasonably practicable;(c)if amended, be amended in such a way that the original and any subsequent amendmentsremain legible, or are capable of retrieval; and(d)be retained, unless otherwise agreed in writing by the Environment Agency, for at least 6 yearsfrom the date when the records were made, or in the case of the following records until permitsurrender:(i)off-site environmental effects; and(ii)matters which affect the condition of the land and groundwater.4.1.2The operator shall keep on site all records, plans and the management system required to bemaintained by this permit, unless otherwise agreed in writing by the Environment Agency.4.2Reporting4.2.1The operator shall send all reports and notifications required by the permit to the EnvironmentAgency using the contact details supplied in writing by the Environment Agency.4.2.2A report or reports on the performance of the activities over the previous year shall be submitted tothe Environment Agency by 31 January (or other date agreed in writing by the Environment Agency)each year. The report(s) shall include as a minimum:(a)a review of the results of the monitoring and assessment carried out in accordance with thepermit including an interpretive review of that data;(b)the annual production /treatment data set out in schedule 4 table S4.2; andPermit numberEPR/PP3003PW8

(c)4.2.3the performance parameters set out in schedule 4 table S4.3 using the forms specified in tableS4.4 of that schedule.Within 28 days of the end of the reporting period the operator shall, unless otherwise agreed inwriting by the Environment Agency, submit reports of the monitoring and assessment carried out inaccordance with the conditions of this permit, as follows:(a)in respect of the parameters and emission points specified in schedule 4 table S4.1;(b)for the reporting periods specified in schedule 4 table S4.1 and using the forms specified inschedule 4 table S4.4 ; and(c)giving the information from such results and assessments as may be required by the formsspecified in those tables.4.2.4The operator shall, unless notice under this condition has been served within the preceding fouryears, submit to the Environment Agency, within six months of receipt of a written notice, a reportassessing whether there are other appropriate measures that could be taken to prevent, or wherethat is not practicable, to minimise pollution.4.3Notifications4.3.1In the event:(a)that the operation of the activities gives rise to an incident or accident which significantly affectsor may significantly affect the environment, the operator must immediately—(i)inform the Environment Agency,(ii)take the measures necessary to limit the environmental consequences of such an incidentor accident, and(iii) take the measures necessary to prevent further possible incidents or accidents;(b)(c)of a breach of any permit condition the operator must immediately—(i)inform the Environment Agency, and(ii)take the measures necessary to ensure that compliance is restored within the shortestpossible time;of a breach of permit condition which poses an immediate danger to human health or threatensto cause an immediate significant adverse effect on the environment, the operator mustimmediately suspend the operation of the activities or the relevant part of it until compliance withthe permit conditions has been restored.4.3.2Any information provided under condition 4.3.1 (a)(i), 4.3.1 (b)(i) where the information relates to thebreach of a condition specified in the permit, or 4.3.1 (d) where the information relates to malfunctionor breakdown of abatement equipment shall be confirmed by sending the information listed inschedule 5 to this permit within the time period specified in that schedule.4.3.3Where the Environment Agency has requested in writing that it shall be notified when the operator isto undertake monitoring and/or spot sampling, the operator shall inform the Environment Agencywhen the relevant monitoring and/or spot sampling is to take place. The operator shall provide thisinformation to the Environment Agency at least 14 days before the date the monitoring is to beundertaken.4.3.4The Environment Agency shall be notified within 14 days of the occurrence of the following matters,except where such disclosure is prohibited by Stock Exchange rules:Where the operator is a registered company:(a)any change in the operator’s trading name, registered name or registered office address; andPermit numberEPR/PP3003PW9

(b)any steps taken with a view to the operator going into administration, entering into a companyvoluntary arrangement or being wound up.Where the operator is a corporate body other than a registered company:(a)any change in the operator’s name or address; and(b)any steps taken with a view to the dissolution of the operator.In any other case:4.3.5(a)the death of any of the named operators (where the operator consists of more than one namedindividual);(b)any change in the operator’s name(s) or address(es); and(c)any steps taken with a view to the operator, or any one of them, going into bankruptcy, enteringinto a composition or arrangement with creditors, or, in the case of them being in a partnership,dissolving the partnership.Where the operator proposes to make a change in the nature or functioning, or an extension of theactivities, which may have consequences for the environment and the change is not otherwise thesubject of an application for approval under the Regulations or this permit:(a)the Environment Agency shall be notified at least 14 days before making the change; and(b)the notification shall contain a description of the proposed change in operation.4.3.6The Environment Agency shall be given at least 14 days notice before implementation of any part ofthe site closure plan.4.3.7Where the operator has entered into a climate change agreement with the Government, theEnvironment Agency shall be notified within one month of:(a)a decision by the Secretary of State not to re-certify the agreement;(b)a decision by either the operator or the Secretary of State to terminate the agreement; and(c)any subsequent decision by the Secretary of State to re-certify such an agreement.4.4Interpretation4.4.1In this permit the expressions listed in schedule 6 shall have the meaning given in that schedule.4.4.2In this permit references to reports and notifications mean written reports and notifications, exceptwhere reference is made to notification being made “immediately” in which case it may be providedby telephone.Permit numberEPR/PP3003PW10

Schedule 1 – OperationsTable S1.1 activitiesActivityreferenceAR1Activity listed in Schedule1 of the EP RegulationsDescription of specifiedactivityLimits of specifiedactivitySection 1.1 A (1) (a):Burning any fuel in anappliance with a ratedthermal input of 50megawatts or more.Operation of standbyemergency generatorsburning diesel solely in orderto provide electricity to theinstallation in the event of afailure of National Gridelectricity supply.From receipt of raw material(diesel) to combustion inemergency standbygenerators for electricityproduction to exhaust ofproducts of combustion toatmosphere to generation,storage and dispatch ofwastes.The standby emergencygenerators will comprise:-5 generators of 3.9MWth10 generators of 2.7MWth12 generators of3.6MWth6 generators of 5.1MWthThe operational hours of theinstallation shall not exceedthe specifications set out incondition 2.3.6.Electricity produced at theinstallation cannot beexported to the NationalGrid.Generators shall only beoperated for on-siteemergencies and not forelective power generation,such as Balancing Services,Demand Side Responseoperations includingFrequency Control DemandManagement (FCDM) orTriad Avoidance.Directly Associated ActivityAR2Permit numberEPR/PP3003PWStorage of raw materialsStorage of raw materialsincluding diesel.From receipt of rawmaterials to use within theinstallation.11

Table S1.2 Operating techniquesDescriptionPartsDate ReceivedApplicationAppendix 3 - Spring Park Data Centres: Introduction to DataSupporting IED Application EPR/DP3731YL/A001 Appendix 3 Technical Note March 2019Duly Made17/04/19P3, P4 and Generation Plant Spring Park Flood assessmentsurface water drainage strategy August 2017 WIE11565Appendix 10 Ark Spring Park Energy and EmissionsManagement Plan 6001-DResponse to Schedule 5Notice dated 16/05/19Responses to questions 1 - 828/06/19Table S1.3 Improvement programme requirementsReferenceIC1IC2RequirementThe Operator shall produce an Air Quality Management Plan inconjunction with the Local Authority outlining response measures to betaken in the event of National Grid failure. This should include but not belimited to the following considerations: The response should be tailored to reflect the predicted potentialimpact indicated by the air dispersion modelling at individualreceptors; Specific timescales for response measures; How local conditions during a grid failure might influence theresponse required, for example meteorological conditions or time ofday; Contingency for how the response will be carried out in the eventscenario i.e. loss of power; and Timescales for continued review of the management plan.The Air Quality Management Plan shall be submitted to the EnvironmentAgency for approval.The Operator shall carry out a review of the site’s tertiary containmentsystem which serves the oil and diesel storage tanks.The review shall compare the system’s design, method of constructionand integrity against the standards outlined in CIRIA guidance C736 –Containment Systems for the Prevention of Pollution or an equivalentindustry standard. The review shall include a review of how the tertiarycontainment protects the site soakaways.Date07/04/2021 or asagreed in writingwith theEnvironmentAgency07/04/2021 or asagreed in writingwith theEnvironmentAgencyA written report of the review shall be submitted to the EnvironmentAgency for written approval which details: The review’s findings and recommendations; Proposals for the implementation of recommended improvements;and Timescales for implementation of improvements.The Operator shall implement the recommended improvements to thetertiary containment system within the timescales approved by theEnvironment Agency.Permit numberEPR/PP3003PW12

Table S1.3 Improvement programme requirementsReferenceIC3Permit numberEPR/PP3003PWRequirementThe Operator shall carry out a review of the use and location of sitesoakaways and infiltration pond and the systems and procedures in placeto prevent surface waters containing diesel or other contaminantsdraining to these discharges. This review shall identify any improvementsrequired in the operation, management and protection of the soakawaysand infiltration pond to ensure there is no pathway for pollutants to leavethe site via these discharges.The Operator shall submit a report to the Environment Agency forapproval that outlines the results of the review and any changesnecessary to the site’s soak away and infiltration pond system.Any agreed proposals shall be implemented by the operator in line withtimescales agreed by the Environment Agency.Date07/07/2021 or asagreed in writingwith theEnvironmentAgency13

Schedule 2 – Waste types, raw materials and fuelsTable S2.1 Raw materials and fuelsRaw materials and fuel descriptionSpecificationDieselNot exceeding 10ppm sulphur contentPermit numberEPR/PP3003PW14

Schedule 3 – Emissions and monitoringTable S3.1 Point source emissions to air – emission limits and monitoring requirementsEmissionpoint ref. nceperiodMonitoringfrequencyMonitoringstandard ormethodA1 – A33[Shown onsite plan inSchedule 7]Standbygeneratorsexhausts.Oxides ofNitrogen(NO andNO2expressedas NO2)No limit set-Nomonitoringrequired-CarbonmonoxideNo limit set-Nomonitoringrequired-SulphurdioxideNo limit set-Nomonitoringrequired-NoNo limit ssociatedwith generatordiesel storagetanks A1-A33Table S3.2 Point Source emissions to water (other than sewer) and land – emission limits andmonitoring requirementsEmission point ref. Source& nitoringfrequencyMonitoringstandardor methodDischarge toInfiltration pond asshown on surfacewater drainagelayout plan refWIE11565November 2018submitted withapplicationEPR/PP3003PW/A001Uncontaminated Oil andsite surfacegreasewater from oilstorage areasNonevisibleSpot sampleWeekly-Discharge toSoakaways asshown on surfacewater drainagelayout plan refWIE11565November 2018submitted withapplicationEPR/PP3003PW/A001Uncontaminated Oil andsite surfacegreasewater from oilstorage areasNonevisibleSpot sampleWeekly-Permit numberEPR/PP3003PW15

Table S3.3 Point source emissions to sewer, effluent treatment plant or other transfers off-site–emission limits and monitoring requirementsEmission point ref. &locationSourceParameter Limit(incl.Unit)Reference Monitoring Monitoringperiodfrequency standardor methodFD1 shown on sitefoul drainage layoutWIE11565 November2018 submitted withApplicationEPR/PP3003PW/A001Connection toWestwells RoadPublic Sewer asshown on surfacewater drainage layoutplan ref WIE11565November 2018submitted potsampleWeekly-Permit numberEPR/PP3003PWUncontaminated Oil andsite surfacegreasewater from oilstorage areas16

Schedule 4 – ReportingParameters, for which reports shall be made, in accordance with conditions of this permit, are listed below.Table S4.1 Reporting of monitoring dataParameterEmission or monitoringpoint/referenceReporting periodEmissions to sewerFD1, connection toParameters as required by condition Westwells public sewer3.5.1Land monitoringParameters as required bycondition 3.5.1AnnuallyInfiltration pond,soakawaysEvery 6 monthsPeriod beginsJanuaryJanuary, JuneTable S4.2 Performance parametersParameterFrequency of assessmentUnitsDiesel usageAnnuallytonnesGenerator operation fortesting/maintenanceAnnually-Generator operation foremergency runningWithin 24 hours of emergencyoperation commencing--Generator operation foremergency runningAnnually-total hours operation for site (hours)total hours operation per generator(hours)total number of runs per generator(number)number of minutes per generator run(minutes)date and time of National Grid failure;number of generators operatingimmediately after National Grid failure(number);number of generators operating twohours after National Grid failure(number);total duration (anticipated duration) ofNational Grid failure (hours)total number of occurrences ofoperation of generators (number);total duration of operation ofgenerators (hours).Table S4.3 Reporting formsMedia/parameterReporting formatDate of formWater and LandForm water 1 or other form as agreed in writing by theEnvironment Agency07/07/20SewerForm sewer 1 or other form as agreed in writing by theEnvironment Agency07/07/20Other performanceindicatorsForm performance 1 or other form as agreed in writingby the Environment Agency07/07/20Generator operation during Form emergency scenario or other form as agreed inemergency scenariowriting by the Environment AgencyPermit numberEPR/PP3003PW07/07/2017

Schedule 5 – NotificationThese pages outline the information that the operator must provide.Units of measurement used in information supplied under Part A and B requirements shall be appropriate tothe circumstances of the emission. Where appropriate, a comparison should be made of actual emissionsand authorised emission limits.If any information is considered commercially confidential, it should be separated from non-confidentialinformation, supplied on a separate sheet and accompanied by an application for commercial confidentialityunder the provisions of the EP Regulations.Part APermit NumberName of operatorLocation of FacilityTime and date of the detection(a) Notification requirements for any malfunction, breakdown or f

Ark Data Centres Limited operates a data centre consisting of 5 units known as SQ17, P1, P2, P3 and P4 located on Westwells Road within the Spring Park industrial estate. Electricity for operation of the data centres is provided by five connections to the