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ContractorGuidanceNotePermittingProcess–ExcavationsPAPL-221-340Rev1.
EffectiveDate:28September2017Page1of71PURPOSEThisContractorGuidanceNoteoutlinesthemanagementandcontrolofallExcavationworksconductedbycontractors(includingthird-partycontractors)onthePerthAirportEstate.
2SCOPEExcavationworkswheretheexistinggroundistobedisturbedtoadepthof100mmorgreaterbymanualormechanicalmeans(shovelormachinedigging),andincludesboringordrivinganyobjectintotheground.
ThefollowingisnotconsideredtobeExcavation:vacuumextractionandhanddiggingusingashovelforservicelocationexcavationtomaximumtotaldepthofa100mmorless3DEFINITIONSHighRiskExcavationZone(HREZ)Areasaroundin-groundServicesthatareconsideredtorepresenthighrisktoindividualsandtooperationalreliabilityiftheyaredisturbedHighRiskServiceTypePrescribedDistance(eitherside)GasMains(Dampier/BunburyGasPipeline,HighandMediumPressurepipelines)15MetresFuelLines15MetresGasLowPressure(LP)3MetresHighVoltageReticulatedMainsincludingPrimaryAirfieldCircuits3MetresTelecommunications/DataCabling3Metres4PROCESS4.
1OSHWorksPlanningMeetingAnOSHWorksPlanningMeetingmustbeundertakenbeforeanyworksundercontractorthird-partyworkscommence.
OncompletionoftheOSHWorksPlanningMeetingthefollowingmustbeunderstood:LocationoftheExcavation(andproximitytoHeritageareas)TheextentanddimensionsoftheExcavationPAPL-221-340Rev1.
EffectiveDate:28September2017Page2of7IngroundservicesplanningLocationandIdentificationofallservicesServiceProtectionOfficerappointmentandresponsibilitiesHREZexcavationsidentified,anyadditionalcontrolsIsolationofelectricalservices(ifrequired)Assetownernotificationse.
g.
AtcoGas/Telstra/AirBPPlanningofExcavatione.
g.
Barricading/Signage4.
2HRAExcavationPermitRequestContractorsMUSTraiseaPermitRequestforallExcavationswhichmayimpactonPerthAirport'sinfrastructure,services,operationsorpersonnel,usingthePerthAirportElectronicPermittoWorkSystem(PEMAC).
LinktoPEMACavailablehere:https://hra.
perthairport.
com.
au/PCARE/Security/SignIn.
aspxNOTE:ThePAPLRepresentativeisresponsibleforissuingtheContractorwithaPEMAClogin.
Contractorsmust:CompleteaPAPLHRAEXCAVATIONRequestalongwiththerequiredSupportingDocumentationonlineatleasttenworkingdaysbeforetheplannedworks.
NOTcommencetheExcavationuntilthePermitRequesthasbeenapprovedandsignedbyallparties.
4.
3SupportingDocumentationAllSupportingDocumentationmustbesubmittedwiththeExcavationRequest.
ThetypeofdocumentsrequiredmustbeagreedintheOSHWorksPlanningMeeting.
ExcavationSupportingDocumentationASafeWorkMethodStatementandMethodologyVerificationandidentificationofingroundservicesincludingAs-ConsandGISExclusionzoneiserectedaroundtheproposedworksServiceLocationsDrawingsDBYDandGISDrawingsTemporaryworksrequiredi.
e.
trenchboxes4.
4ReviewofSupportingDocumentationThePAPLRepresentativeandPermitIssuerareresponsibleforreviewingtheExcavationRequestandSupportingDocumentationwithintheallocatedtenworkingdayperiodtoensuretheRequesthasadequatelyassessedthehazardsandcontrolsassociatedwiththework.
PAPL-221-340Rev1.
EffectiveDate:28September2017Page3of74.
5SiteInspectionWhenthePermitIssuerissatisfiedtheExcavationRequestandSupportingDocumentationisadequate,thePermitIssuermustconductasiteinspectiontoensurethattheagreedcontrolsintheSupportingDocumentationhavebeenimplementedonsite.
NOTE:ThePAPLRepresentativemustensurethattherequirementsofthisGuidanceNoteareappliedinrelationtoExcavationSafetyRules.
4.
6IssuePermitOncetheSupportingDocumentationhasbeenreviewedandthesiteinspectioncompletedthePermitIssuermustsignandissuetheExcavationPermittoenableworktocommence.
4.
7MonitoringSpotChecksmaybeconductedtoensuretheagreedconditionsoftheExcavationPermitarebeingimplemented.
4.
8CompletionofWorkAftertheworkiscompletedthePermitApplicantisrequiredtonotifythePermitIssuerandthePAPLRepresentativethattheworksarecomplete.
ThePAPLRepresentativewillclosetheExcavationPermitonPEMAC.
4.
9PermitCancellationShouldanon-complianceoccurwiththeagreedcontrolsintheExcavationPermitandSupportingDocumentationthePermitIssuermaycancelthePermit.
IfthishappenstheApplicantmuststopworkimmediatelyuntilfurtherinstructionfromthePAPLRepresentative.
PAPL-221-340Rev1.
EffectiveDate:28September2017Page4of75APPENDIX–EXCAVATIONSAFETYRULES5.
1GeneralRequirementsAHRA–EXCAVATIONPermitisrequiredforallExcavationswhichmayimpactonPerthAirport'sinfrastructure,services,operationsorpersonnel.
The'HierarchyofControl'mustbeappliedwhenplanningand/orconsideringcontrolmeasures.
Itistheresponsibilityofthecontractortoensurethattheworksareadequatelysupervised/inspectedtoensuretheworksareperformedasdetailedintheExcavationrequestandasexpected.
NoMechanicalExcavationcanbeundertakenwithin1metreofanyPerthAirportServiceunlessanagreedsafesystemofworkisinplaceandagreedwiththePAPLRepresentative.
HREZExcavationsinthevicinityofHighVoltageServicesrequiretheservicestobeisolatedwherereasonablypracticable.
ItistheresponsibilityofthecontractortoliaisewithPerthAirportElectricalTeamtoarrangetheisolation.
ThePAPLRepresentativemustbekeptabreastofanycommunicationswiththeElectricalTeam.
WheretreerootsareencounteredtheabilityforthesetodisturbServicesmanymetresawayshouldbeconsideredandappropriateplanningundertakentoensurethatremovaldoesnotcausedamage.
Priortocommencementofexcavationsaffectingroadsortrafficmovement,adocumentedtrafficmanagementplanshouldbepreparedthatincludes,wherenecessary,trafficcontroller,barricadesandanyroadclosures.
5.
2ExcavationPlanning5.
2.
1SWMSASWMSmustbecompletedandapprovedbeforeallexcavationsandgroundpenetrations.
TheSWMSshould:Provideadescriptionofthemethodstobeusedtoundertakeaninitialexaminationofthearea(e.
g.
toconfirmthatthelocationofutilitiesandessentialservicesiscorrect)ProvideadescriptionoftheexcavationmethodstobeusedtoundertaketheworkProvideadescriptionofthestandardworkproceduresandcontrolsthatapplyrelatingtobenching,shoring,placementofspoil,groundsupport,trafficabilityneartheedgesofopenexcavations,preventionoffalls,accessandegressfromtheexcavation,ventilationsystems,dewateringsystemsetc.
Detailthestepsandcontrolmeasuresrequiredtobeundertakentoensureasafesystemofwork.
5.
2.
2DatacollectionforexistingServicesDialBeforeYouDig(DBYD)enquirytoestablishtheknownServicesintheareawhereExcavationisplanned.
DBYDenquiriescanbelodgedinoneofthreeways:PAPL-221-340Rev1.
EffectiveDate:28September2017Page5of71.
Lodgingonlineatwww.
1100.
com.
au,or2.
UsingtheiPhoneApp,or3.
Ringingthenationalcallcentreon1100duringbusinesshours.
Asthereareasignificantnumberofactivitiesoccurringontheestate,inadditiontoDBYDenquiry,thePerthAirportDesignOfficeshouldbecontactedon94788888toverifywhetherotherworksrecentlycompletedorinprogresshaveinstalledadditionalServicestothoseshownontheDBYDdatawithinoradjacenttotheproposedExcavationsite.
5.
2.
3AccuratelocationofServicesonthesiteTherecommendedapproachforServicedetectionisasfollows:Step1–ServiceDataIdentificationDiscusstheDBYDdatawithyourServiceLocationContractorsanddevelopaplantoensurethatthemostappropriatedetectiondevicesareusedtobestidentifytheServicesknowntobeonthesite.
Step2–ExcavationSiteIdentificationTheextentandlocationoftheExcavationistobeaccuratelymarkedonthesiteusingtheinformationprovidedontheExcavationLocationPlanrequiredforanExcavationPermit.
Step3–ServiceLocationandMarkingRequirementsEachServiceshownontheDBYDdataandadditionalServicesidentifiedbythePAPLDesignOfficeistobemarkedonthesiteusingasystemofidentificationthatcanbemaintainedforthedurationofthework.
Identificationmarkers,suchasPVCpipes,sprayorsurveypegs,mustbeconsistentlycolourcodedandmustincludeinformationreferencingservicetype,pipe/conduitconfigurationandknownservicedepth.
DetailsofthecolourcodingmustbeincludedaspartoftheExcavationRequest.
HREZServicesrequireanincreasednumberofmarkerstobeinstalledandgreatercontrolonmarkerintegrityandlocationaccuracy.
TheServiceLocationContractoristoverifythateachServiceshownontheDBYDdataandadditionalServicesidentifiedbythePAPLdesignofficehasbeenmarkedonthesiteandthatthemarkersforeachcanbeclearlydistinguishedfromoneanother.
ServiceCrossingExcavationWhereExcavationcrossesaServicethemarkersaretoextendsufficientlybeyondeachendoftheExcavationtoensurethatatleasttwomarkersremainoneachsideoftheExcavationsothatthealignmentacrosstheExcavationcanbere-establishedatanytimeduringExcavation.
ServiceParalleltoExcavationWhereServicesrunparalleltotheExcavation,markersshouldbeinstalledatregularintervalsalongtheentirelengthoftheExcavationandextendingatleasttwomarkersbeyondtheextentoftheExcavation.
NOTE:FollowingareviewoftheDBYDdataandGISwheretheExcavationsworksareshownnottobeinaHREZandtheexcavationmethodisdeemednon-invasivebythePermitIssuer,thestepstobeimplementedasstipulatedinStep3aboveareatthediscretionofthePermitIssuer.
PAPL-221-340Rev1.
EffectiveDate:28September2017Page6of7Step4–ExcavationPerimeterScanAsthedataonServicescancontaininaccuraciesincontentandalignmentitisalsonecessaryfortheperimeteroftheExcavationtobescannedusinganappropriatetechniquetoidentifyifanyunknownServiceenterstheExcavationzone.
Aminimumof3mmustbescannedaroundtheperimeteroftheexcavation.
Step5–MarkerCurrencyItistheresponsibilityofthecontractortoensurethattheactivitiesonsitedonotdisturbmarkers.
IfmarkersaredisturbedtheServiceLocationContractormustre-confirmtheaccuracyofmarkersrelevanttotheremainingExcavationworksbeforetheExcavationworksrecommencing.
5.
2.
4InformationonBuriedServicesOwned/ManagedbyInfrastructureCompaniesMuchoftheburiedservicesinfrastructureonthePerthAirportEstateisownedandmanagedby3rdpartyinfrastructurecompanies,including:FuelLines–AirBPGasMains–WestNetEnergy,AlintaGasandtheDampiertoBunburyNaturalGasPipelineAuthorityTelecommunications-TelstraPlanningforExcavationinthevicinityoftheseservicesshouldincludeengagementwiththeseorganisations(duringtheplanningphase),includingtheidentificationofcontrolsoracontingencyplaninthecaseofHREZ.
5.
3ServiceProtectionOfficerForeveryExcavationactivityonthePerthAirportestateapersonwithinthecompanyresponsiblefortheExcavationistobeidentifiedastheServiceProtectionOfficer(SPO).
TheSPOisthepersonthatPAPLholdsabsoluteresponsibilityforensuringthatnoServicesaredamagedduringtheExcavation.
TheSPOisspecificallyresponsible:ForensuringthatthecommitmentsmadeinandtheconditionsattachedtotheExcavationPermitfortheExcavation,arefollowedtotheletter;Forassessing,inatimelymanner,whentheidentifiedmitigationmeasurescannotbestrictlyfollowed;ForassessinginatimelymannerwhentheidentifiedmitigationmeasureswillnotachievethegoalofpreventingdamagetoServices;ForensuringthesafetyofpersonnelinvolvedorthosenearanExcavation;Forcausingtheworkstobehalteduntilthenecessaryre-assessmentofriskandsafetycanbeproperlyundertaken;FormanaginganychangesmadetotheExcavationPermitandtohavetheExcavationPermitre-approvedbythePermitIssuer.
TheSPOisresponsibleforensuringthecontinualprotectionofnewandexistingServicesduringactivitiesfollowingtheExcavationincludinginstallationofitemsinanyExcavation,thesurveyingofinstalledandexposedServicesandtheoperationofbackfilling.
ForworkinHighRiskExcavationZones(HREZ)100%supervisionisrequiredbytheSPO.
PAPL-221-340Rev1.
EffectiveDate:28September2017Page7of75.
4ControlofHighVoltageServicesWhenExcavationistobeundertakeninthevicinityofHighVoltageServicesthathavenotbeenisolated,aPAPLElectricalRepresentativenominatedbyPAPL'sAirportElectricalEngineermustalwaysbepresentduringtheExcavation.
5.
5ExcavationSafetyWhereexcavationsare1.
5metresdeeporgreaterthecontractormustensure,thattheworkareaissecuredfromunauthorisedaccessbyprovidingsuitablesolidbarriersandsuitablesignage.
Theriskofinjurytoanypersonarisingfromthecollapseoftheexcavationsmustbeminimisedbyensuringthatallsidesoftheexcavationareadequatelysupportedbydoingoneormoreofthefollowing:oshoringbyshieldingorothercomparablemeans,obenching,obattering.
Nounauthorisedpersonshallbepermittedtoenteranexcavationwhileexcavationequipmentisoperating.
Toenablesafeaccessandegresstoandfromexcavations,ladders,rampsorothersafemeansofentryorexitshouldbeprovided.
Safeandsuitablemeansofmovementmustbeallowedforpersonsinandaroundandexcavatedarea.
Noitemofplantorexcavatedmaterialshouldbeplaced/storedneartheexcavatedarea.
Considerationshouldbegiventotheneedforanareatobeestablishedforstockpilingexcavatedmaterial.
Ifitisnotreasonablypracticabletoestablishastockpilearea,excavatedmaterialshouldbeplacedoutsidea45-degreeslopelinepassingthroughthebottomoftheexcavationandinnocasecloserthan1000mmfromtheedgeoftheexcavationExcavationsshouldbeinspecteddailybyacompetentpersonbeforethestartofworks.
5.
6EnvironmentalandHeritageClearanceThecontractormustensurethatHeritageMonitorsareengagedduringExcavationworksinareasofremnantvegetationorareasformallyregisteredbytheStateasheritagesites.
Shouldarchaeologicalmaterialbedisturbedduringexcavations,thecontractormustceaseallExcavationworksandcontactthePAPLRepresentativewhowillnotifyPerthAirport'sApprovalsTeam.
AClearing/PruningPermitmustbesoughtforanyremovalofvegetation,whethernativeorlandscapetrees/shrubsindevelopedareas.
ACleanFillFormmustbeapprovedbytheEnvironmentTeambeforeimportingoffillormovingsurplusspoilwithintheestate.
ADewateringPlanmustbeapprovedbytheEnvironmentTeambeforeanyExcavationworksrequiringdewatering.