Substation Civil Design and Construction Standard

1 TasmanianNetworksPtyLtd(ABN24167357299)S tandardSubstationCivilDesignandConstruct ion ,June2018 TasmanianNetworksPtyLtd(ABN24167357299)A uthorisationsActionName and titleDatePrepared byMichaelVerrier SeniorAssetStrategy EngineerJune 2018 Reviewed bySantoshDhakal Asset EngineerJune 2018 Authorised byDarrylMunro AssetStrategyTeam LeaderJune 2018 Reviewcycle30 monthsResponsibilitiesThisdocumentisther esponsibilityof theAsset StrategyTeam,TasmanianNetworksPtyLtd, ABN 24 167 357 299(hereafterreferredtoas "TasNetworks").PleasecontacttheAssetStra tegyLeader withanyqueriesor suggestions. ImplementationAllTasNetworks staffand contractors. ComplianceAll group RequirementsTherequirementssetoutinTasNe tworks documentsareminimumrequirementsthatmustb ecompliedwithbyallTasNetworksteam members, contractors,andother document.

2 TasmanianNetworksPtyLtd 2014 Page3 of47 SubstationCivilDesignandConstructionStan dardRecordof revisionsSection numberDetailsEntire docCopiedoververbatimfromsupersededTrans endtoTasNetworks knownincludingAustralian lighting details updatedAppendix of47 SubstationCivilDesignandConstructionStan dardTableof , definitionsand requirementsforcivil codeof andelectrical , complianceand andassociated andplumbing works Service or impact assessment14 Page5 detail installed andsoilcontamination clearance,excavationand of orimported and requirements19 Page6 roadsandloading basecourse,sub-base,subgrade,andselect forroadsand railsand requirementsforsite pipe and withaccesstowater andcommissioning tests25 Page7 withnoaccesstoreticulatedwater andconcrete controland toreduce controlandtestingof bank andfloor levels31 Page8 and and and fire andnutsfor togalvanized requirementsfor requirementsfor Containment requirementsforoilcontainment requirementsforoilcontainment requirementsforoilcontainment testingforoilcontainment requirementsfortransformer requirementsfortransformer fortransformerbund containment requirementsforoilcontainment requirementsforoilcontainment yardfire checksand works40 Page10 and and containmentand tobeprovidedwith Points42 Appendix1 References.

3 Definitionsand Standard and definitions45 Appendix2 Project StandardEmergencyDC of47 SubstationCivilDesignandConstructionStan dardListof tablesTable compaction requirements23 Table acceptablecrack widths27 Table clearances30 Table parameters47 Listof figuresFigure roads20 Page12 Tasmanian NetworksPtyLtd(hereafterreferredtoas TasNetworks ). Forallelectricalandelectricalrelatedwork refer to therelevantTasNetworks ,engineering,manufacture, Construction ,te stingatmanufacturer sworks,securedpackaging,supply,transport ation,deliverytosite,testingandcommissio ningwithcompletedocumentationofcivilwork sandistobeappliedtonewinstallationsaswel lasredevelopmentofpartorallofexisting toensure: thattherelevantAustralianandStatelegalre quirementsare met; thattherequirementsoftheNationalElectric ityRulesare met; personnelandpublic safety; ease inoperationand maintenance; reliabilityandcontinuityofpowersupplytot hepowertransmission network; theimplementationofTasNetworks strategicperformance objectives; thatanoptimisedprojectisdesignedanddeliv ered.

4 And thatthecustomer srequirementsare ,definitionsand acronymsAsacomponentofthecompletespecifi cationforasystem, ,definitionsandacronymsspecifictothispro jectareincludedinAppendix ,anyrequirementinthisStandardforasubstat ionyardisalsoapplicabletoaswitchyardunle ssspecified forcivil ,buildingworksandassociatedservicesmustb esuitableforthepurposesdescribedinthisSt andardandwhererequiredassociateddocument ationistobe ,buildingworksandservicesincludethedesig n,supplyofmaterials, Construction ,install ationandtestingasrequiredbythis of47 SubstationCivilDesignandConstructionStan dardThesafetyofpersonnelandequipmentmust atalltimesbeparamountparticularlyiflive overhead linesorundergroundcablesexistwithintheco nstruction codeof practiceTheContractormustdesignallcivilw orksincompliancewiththerelevantTasNetwor ks Standards,AustralianStandards,DIERS tandardSpecifications(asrequired),Buildi ngCodeofAustralia(BCA),andLocalGovernmen tAuthority ,cleaning,assetreplacementand ,jackingpadsoralternativehandling loadingsAllelementsmustbedesignedinaccor dancewiththerelevantAustralianStandardsc onsideringthemostunfavourablecombination ofstatic,dynamicwind,snow,iceandearthqua keloadings.

5 Loadingsmustbebasedontherelevantpartsof AS/NZS ( )asper AS/NZS andelectrical bondingAllearthingandelectricalbondingmu stbedesignedtotherelevantAustralianStand ardsandTasNetworksStandardswithparticula rattentiontoTasNetworks StandardsR522692 SubstationLightningProtectionandEarthing Standard ,R522687 GeneralSubstationRequirements,andR522697 TemporaryEarthingofSubstation yard forapparatusmust be connected , complianceand andassociated requirementsTasNetworks isresponsibleforobtainingthefollowing permits:(a)Planning;(b)Aboriginalcultura l heritage;(c)Historic heritage; and(d) isresponsibleforon-groundplanning,herita geandenvironmentalsurveysrequiredinobtai ningtheappropriatepermitsunderrelevantLo cal,StateandCommonwealth mayincludeconditionsthatarerelevanttothe of47 SubstationCivilDesignandConstructionStan dardTheContractormustimplementthepermitc onditionsassociatedwiththePlanning,Herit ageandEnvironmentalpermitsspecifiedinPDR , andplumbing permitsTheContractorisresponsibleforobta iningapprovalsinrelationtobuildings,wate r,sewersanddrainsfromtherelevantAuthorit y(s)includingtheengagementofsuitablyqual ifiedBuildingSurveyorsif permitsTheContractorisresponsibleforobta iningapprovalsundertheLocalGovernment(Hi ghways)Act,1982,andtheRoadsandJettiesAct 1935inrelationtoworkscarriedoutinapublic roadfromtheappropriateAuthority(s).

6 TheContractorisresponsibleforallcostsass ociatedwithalterationsandconnectionstoex istingpublicinfrastructureandmustobtainw rittenapprovalfromtherelevantauthoritypr iortocommencingworksthataffectthepublic ,firehydrantandenclosuredetailsandlocati onsmustbesubmittedtotherelevantauthoriti esandtheirapprovalobtainedinwritingprior toanyinstallationwork ,inrelationtolandorlandownersimpactedbyt heworksunderthe approvalsTheContractormustmakeallarrange mentsandobtainallotherpermitsthatarenece ssarytoundertaketheworksundertheContract ,includingbutnotlimited to:(a)workplace safety;(b)hazardous materialsor waste;(c)dangerous goods;(d)noise;(e)soilandwatermanagement ;and(f) ,otherActsandassociatedRegulations,orCod esand ,theContractormustprovidetoTasNetworks copiesofdocumentaryevidencepertainingtoa llapprovals,permitsorcertificatesobtaine dandpaymentofallfeesand impact assessmentTherequirementsoftheEIA,specif iedintheContract,mustbeimplementedinacco rdancewiththeactionplanoftheEIAandTasNet works StandardD11/52510 EnvironmentalImpactAssessmentand either:(a)GENIO data file; or(b)3 DAutoCAD ofallhorizontalandvertical controls requiredunderthisStandard arecontainedinICSM , (AHD 1983).

7 AstatementoftheaverageCombinedScaleFacto r(CSF)tobeappliedtoconvertfromGRIDtoGROU ND distancesmustbeclearlyshownonallsheetsof thedetailsurveyanddesignplans,wherethesu rveycontrolcoordinatesare detail ,groundlevels, DialbeforeyouDig contactwhichmustbesuppliedwithintwo(2) servicesareattheContractor s andsoilcontamination investigationTheContractormustrefertothe projectspecificationforresultsofgeotechn icalandsoilcontaminationtestingthatmayha vebeenundertakenbyTasNetworks. Thisinformationisprovidedforinformationp urposes only. assumesthantheContractorhasundertakenani ndependentevaluationofthegeotechnicalinf ormationandasiteinspectionbyaqualifiedge otechnicalengineerbeforelodginga requirementsAlldemolitionworkistobeunder takeninaccordancewith AS (WorkPlan)ofAS priortocommencementof works:(a)Removal ofallredundantunderground pipes;(b)Removal ofallredundantconcreteslabsandother paving.

8 And(c)Removal ofallredundantfoundationstoaminimumof100 mmbelow of47 SubstationCivilDesignandConstructionStan dardWhereTasNetworks hasadvisedofthepresenceofasbestos,orwher easbestosisidentifiedpriortoorduringthep erformanceofworkonsite,theContractormust complywiththerequirementsofR472616 AsbestosManagementandControlinthe ,excavationand requirementsThefollowinggeneralrequireme ntsareapplicabletoallsiteclearance,excav ationand earthworks:(a)Allsiteclearance,excavatio nandearthworksnecessarytoprovideasuitabl esurfacefortheconstruction,installationa ndfutureoperationandmaintenanceoftheinst allationanditsequipment,mustbe performed;(b) ;(c)Thesitemaybebenchedwhererequiredtoac hievetherequirementin(b).Whereitisimprac ticaltoachievetheserequirementsforagiven siteorpartofasite,practicalalternativesm ustbepresentedtoTasNetworks for approval;(d) owners;(e)Whereasitecontainscontaminated soil,therequirementsfortreatmentofthecon taminatedsoilmustbetakenintoaccounttoens urethatthesoilistreatedinaccordancewitht herequirementsoutlinedinthe EIA;(f)Appropriatestepsmustbeundertakent oensurewaterflowingthroughthepropertywil lnotconveysiltdownstream,eitherthroughdr ainsoroverland,ontoadjacent properties.

9 And(g)Appropriatestepsmustbeundertakento ensureanyalteredwaterflowsdonotleadto , grassedembankmentbattersmustbedesignedan dconstructedsothatthegrasswillgrowinands tabilisethebatterinthelongtermusingacomb inationofsubsoilenhancement,topsoiling, hydromulch, a maximum slopeoftwohorizontal to of47 SubstationCivilDesignandConstructionStan dardWheresofterrocktypesexistwhicharesub jecttoerosionduetoanalteredstate,theCont ractormustdetailtheproposedtreatmentsand implementaccordinglyafterreceivingTasNet works ,equipmentspacerestrictionsoradjacentpro pertyrestrictionssuitableretainingwallsm ustbeconstructedtoformtherequiredsurface levelsofthesubstation WallsRetainingwallsmustbeinstalledinacco rdancewithmanufacturer AS work:(a)Allexcavationworksmustcomplywith theminimumrequirementsofD05/44571 Excavation Standard ;(b)Excavateallmaterialnecessary toachievethefinishedsubstationyardsurfac elevelandthelevelrequiredforfoundationsf orbuildingsand equipment;(c)Allexcavationsmustbeperform edtoanevensurfaceunderfoundationsandvehi cularroadssothatfuturedifferentialsettle mentis avoided;(d)Allexcavationmustbeundertaken withinthesitetothedimensionsnecessarytoa llowforworkstobeproperlyandconvenientlyc arried out;(e)Excavationmustbeneatandsquarewith batterssuitablefortheexposedmaterialandl evelbottoms,consolidatedwherenecessaryto receivenew work;(f)Allstruttingandshoringnecessaryf orsafeexecutionoftheworksmustbe provided.

10 And(g)Allsubgradeareasmustbetrimmedsotha tthetopsurfaceofthesubgradeisfree ,whichisdefinedasunsuitableforthework, includes:(a)fillornaturalgroundliableto subsidence;(b)containingcavities,faultso r fissures;(c)groundcontaminatedbyharmful substances; and(d)groundwhichisorbecomessoftor unstable andmustbeexcavatedandunlessotherwiseappr ovedbyTasNetworks, removedfromsiteanddisposedofinaccordance withD04/10174 WasteManagement Procedure. Wherenecessary,materialmustbeimportedtor eplaceanyunsuitablematerialandestablishf oundation of subgradeFollowingcompletionofsubgradecom pactionandtrimming,thewholesubgradearea must:Page19 of47 SubstationCivilDesignandConstructionStan dard(a)beproofrolledwithafullyloadedsing lerearaxletruck(MediumRigid). Acceptancerequiresnovisiblesignsofdeform ationorinstabilityinthesubgradeduringpro of rolling;(b)wheretestedwithaBlenkelmanBea m,acceptancerequiresa characteristic deflectionoflessthan 2 mm.