UST Compliance HandbookandDocumenta/onToolkitUndergroundStorageTankOwnersandOperatorsStateofNevada

www.arcnevada.com

801‐597‐6873

Edi/on1.0

NicoleHaynesMcCoy,PhD

COPYRIGHT2012

AllRightsReserved

ARC Nevada

CONTENTSChapter1:Introduc1ontoUnderground

‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐StorageTankCompliance 1ChapterOverview 1EnvironmentalandRegulatoryContext 1

RegulatedSubstances 2PetroleumProducts 2HazardousSubstances 3

PurposeofThisHandbook 3Organiza1on 4

Chapter2:USTProgramRulesand‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐Regula1ons 5

ChapterOverview 5USTRegulatoryStatus 5ProvisionsoftheEnergyActof2005 5Regula/onsforCompliance 6

OwningorOpera1ngaUSTinNevada 7PermitsandFees 7FinancialResponsibility 7DeliveryProhibi/on 8SecondaryContainment 9No/fica/on 11Record‐keeping 11

RequirementsforTankClosure 12TemporaryClosure 12PermanentClosure 13

‐‐‐Chapter3:ABCOperatorRequirements 15ChapterOverview 15OperatorRequirements 15ClassAOperator 15ClassBOperator 15ClassCOperator 16UnmannedFacili/es 16

TrainingandRegistra1on 17ClassAandBOperators 17ClassCOperators 17RetrainingforNon‐Compliance 17

‐‐‐‐‐‐‐Chapter4:USTSystemComponents 19ChapterOverview 19

USTSystem 19USTSystemComponents 19USTSystemFunc1on 21

‐‐‐Chapter5:SpillandOverfillPreven1on 23ChapterOverview 23Introduc1on 23Table5.1Spillandoverfillpreven3on:Equipmentrequirements 23

SpillPreven1on 24SpillBuckets 24

OverfillPreven1on 25OverfillPreven/onEquipment 26

Table5.2.Overfillpreven3ondevices:Func3onalrequirements 30

Owner/OperatorResponsibili1esinPreven1ngOverfills 30

Table5.3Spillandoverfillpreven3ondevices:Operatorinspec3on 31

‐‐‐‐Chapter6:ReleaseDetec1onforTanks 33ChapterOverview 33Introduc1on 33LeakDetec/onFramework 34

Table6.1.Leakdetec3onfortanks:Requirementoverview 34

In‐TankMonitoring(Automa1cTankGauging) 35ATGPeriodic(Sta/c)Tes/ng 36ATGCon/nuousTes/ng 37TankTestLimita/onsforATGs37

Table6.2.In‐TankMonitoring(Automa3cTankGauging) 38

SecondaryContainmentwithInters11alMonitoring 39ManualInters//alMonitoring 39Con/nuousInters//alMonitoring 40

Table6.3.SecondaryContainmentwithInters33alMonitoring 41

Sta1s1calInventoryReconcilia1on 42SIRProcess 42

Table6.4.Sta3s3calInventoryReconcilia3on(SIR) 44

InventoryControlandTankTightnessTes1ng 45

Table6.5.InventoryControlandTankTightnessTes3ng 46

ManualTankGauging 47Table6.6.ManualTankGaugingwithTankTightnessTes3ng 48

GroundwaterMonitoring 49VaporMonitoring 49Table6.7.Releasedetec3onfortanks:Systemscompared 51Table6.8.Leakdetec3onfortanks:Operatorinspec3on 52

‐‐‐‐Chapter7:ReleaseDetec1onforLines 53ChapterOverview 53Introduc1on 53Table7.1.LeakDetec3onforPiping:Requirementoverview 53

TypesofSuc/onPiping 54PressurizedPipingSystems 56CatastrophicReleaseDetec/on 57SecondaryLeakDetec/on 59

Table7.2.Lineleakdetec3on:Methodandtes3ngrequirements 63

Table7.3.LeakDetec3onforPiping:Operatorinspec3on 64

ContainmentSumps 64SumpComponents 65

Table7.4.SumpsandDispensers:Operatorinspec3on 66

‐‐‐‐‐‐‐‐‐‐‐‐‐Chapter8:CorrosionProtec1on 67ChapterOverview 67Table8.1.CorrosionProtec3on:Requirementoverview 67

Introduc1ontoCorrosion 68CathodicProtec1on 68CorrosionProtec1onRequirementsbyUSTSystemMaterial 70TankMaterials 70PipingMaterials 71

Table8.2.Corrosionprotec3onsummarybymaterial 72

Tes1ngCPSystems 72Table8.3.Cathodicprotec3on:Operatorinspec3on73

‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐Chapter9:Compa1bility 75ChapterOverview 75Compa1bility 75Table9.1.Compa3bilityoverview 75

Alterna1veFuels 76Ethanol 77Biodiesel 78

‐‐‐‐‐‐‐‐‐‐Chapter10:EmergencyResponse 79ChapterOverview 79Introduc1on 79Table10.1.Emergencyresponse:Requirementoverview 79

AlarmsorUnusualCondi1ons 80AlarmResponse 80UnusualCondi/ons 80

SuspectedReleaseInves1ga1on 81Inves/ga/onSteps 81

Release/SpillResponse 82EmergencyPlanning 82

‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐Chapter11:MarinaUSTs 83ChapterOverview 83Introduc1on 83Table11.1.Marinas:RequirementOverview 83

OwningorOpera1ngaMarinaUSTinNevada 84

TankRequirements 85SecondaryContainment 85Tankfillingequipment 86Monitoring 86

PipingandValveRequirements 86EmergencyShutoff 86SecondaryContainment(forpiping) 86PipingatFloa/ngMarinas 87

DispensingEquipment 87RequiredDailyInspec/on 87RequiredMonthlyInspec/on87

CorrosionProtec1on 88‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐Defini1ons 89

Chapter 5: Spill and Overfill Prevention

Chapter OverviewThischapterfocusesonspillandoverfillpreventionduringdeliveries.Topicscoveredinclude:‣ Spillandoverfillprotectionequipment

suchasspillbuckets,automaticshutoffdevices,ballfloatvalves,andoverfillalarms;

‣ Owner/operatorresponsibilitiesinpreventingoverfills;

‣ Operatorinspectionofspillandoverfillpreventionequipment.

IntroductionRecallthatpreventionofspillsandoverfillsisacriticalcomponentofthepreventionanddetectionrequirementsforUSTownersandoperators.TheU.S.Environmental

ProtectionAgency(EPA)designedpartofthetechnicalregulationsforundergroundstoragetank(UST)systemstoprevent

releasesfromUSTs.TheregulationsrequireUSTstobeprotectedfromspills,overfills,andcorrosion.

Spilloroverfillmeansanyreleaseofaregulatedsubstancethatoccurs:(a) Abovethesurfaceofthegroundata

facilitywhereastoragetankislocated;(b) Fromadispenserformotorfuelabovethe

sheervalveforthedispenser;orc) Fromanyancillaryequipmentforthetanksystemthat:

(1) Isnotincludedinanysystemforthedetectionofaleak;and

(2) Isaccessibletovisualinspection (fromNAC459.996)

TABLE5.1SPILLANDOVERFILLPREVENTION:EQUIPMENTREQUIREMENTS

SPILLANDOVERFILLPREVENTIONEQUIPMENTREQUIREMENTSSPILLANDOVERFILLPREVENTIONEQUIPMENTREQUIREMENTS

What EnsureyourUSTisproperlyequippedwithspillandoverfillpreventionequipment.

How Spillprevention:spillbuckets‐properlyinstalled,sized,keptclean,dryandingoodconditionOverfillprevention:automaticshutoffdevices,ballfloatvalves,oroverfillalarms.

When Devicesinstalledatinstalla/on;ongoingmaintenanceitem.

Why Federal40CFR280.20PerformancestandardsfornewUSTsystems.(c)Spillandoverfillpreventionequipment.40CFR280.21UpgradingofexistingUSTsystems.(d)Spillandoverfillpreventionequipment.40CFR280.30Spillandoverfillcontrol.

Who Owner/Operatorresponsibleforhavingproper,functionalequipment.

NOTE IfanUSTneverreceivesmorethan25gallonsata3me,theUSTdoesnothavetomeetthespillprotec3onrequirements.Manysmallusedoiltanksfallintothiscategory.

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Spill Prevention ManyreleasesatUSTsitescomefromspills.Spillsoftenoccuratthefillpipewhenthedeliverytruck’shoseisdisconnected.Althoughthesespillsareusuallysmall,repeatedsmallreleasescancausesignificantenvironmentalproblems.Humanerrorcausesmostspills.Thesemistakescanbeavoidedbyfollowingindustrystandardpracticesfortankfilling.Ifyouandthedeliverydriverfollowstandardpractices,nearlyallspillscanbeprevented.Forthisreason,federalUSTregulationsrequirethatyoufollowindustrystandardpracticesfortankfilling.

SpillBucketsEPArequiresthatallfillpipeshaveaspillpreventiondeviceinstalledaroundthem.OnlyUSTsystemsthatarefilledby25gallonsorlessareexemptedfromthisrequirement.

Spillbuckets,alsocalledcatchmentbasins,arecontainedsumpsatthefilland/orvaporrecoveryconnectionpoints.

Thespillbucketshouldbelargeenoughtocontainwhatmayspillwhenthedeliveryhoseisuncoupledfromthefillpipe.Atypicaldeliveryhosecanholdabout14gallonsoffuel.

Spillbucketsarenormallylocatedontopofthetankandarepositionedbelowgrade.Thetopofawell‐constructedspillbucketisslightlyabovegradetohelpdrainrainandsurfacewaterawayfromthespillbucketopening.Thatpreventsunwantedliquid

fromgettingintothespillbucketonitswaytoyourtank.

Thereisnocapacityrequirementforspillbucketsandmostrangeinsizefrom5to

25gallons,withlids1‐2feetindiameter.Some/messpillbucketlidswillbecolor‐

codedtohelpthedriverputtherightproductintotherighttank.

Spillbucketsmustbeliquid/ghtinorderforthemtofunc/onasintended(andasrequiredbyEPA)—tokeepsmallspillsattheendofadeliveryfromgefngintothe

soil.Asshowninthediagramsthatfollow,spillbucketsmaycomeequippedwitheitherapumpordraintoremovefuel.Drainvalvesallowexcessfueltobedraineddirectlybackintothetank.Aslongasthedrainvalveis/ght,thisdeviceshouldn’tposeaproblemtoopera/ons.Inaddi/ontospilledfuel(andperhapsevenmorefrequently),waterandsedimentcangetintospillbuckets.Ifyourspillbucket

Federalregulations(40CFR280.20(c))requireUSTsystemstobeequippedwithbothspillpreventionandoverfillpreventionequipment.

Federalregulation40CFR280.20(c)(i)requiresspillpreventionequipmentthatpreventsareleaseofproducttotheenvironmentwhenthetransferhoseisdetachedfromthefillpipe(forexample,aspillcatchmentbasin).

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Spillbuckets,alsocalledcatchmentbasins,comeinmanydifferentdesignsandsizes.BesuretoselectonethatisappropriateforyourUST.

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comeswithadrainthatflowsdirectlyintothetank,youdon’twanttodrainwaterintoyourtank.Waterinthetankisa fuelqualityissue,butanevengreaterconcernisthatwatercanruststeeltanksfromtheinside out,and,inexcess,canimpactyourabilitytodetectleaks.

Ifyourspillbucketdidn’tcomeequippedwithapump,youcanpurchaseasparkfreehandpumptodrawthewaterandsedimentoutofthespillbucket.Note:Ifthismixturecontainsfuelorchemicals,makesureyoudisposeofitproperly,asitmaybeconsideredhazardouswaste.

Spillbucketstakealotofabusefromweather,spilledfuel,drivers,snowplowsandotherfactors.TheyagequicklycomparedtootherpartsoftheUST.Checkthemregularlyandbepreparedtoreplacethemperiodically.

Spillbucketsdon’tkeepthefueloutofthegroundiftheyarenotliquidtight.Monitorthemforcracksorholesinthebottom,keepaneyeonthesealaroundthefillpipe,

Spillbucketcontainingspilledfuel.

andlookforcracksinthebellows.Don’tleavefuelinthem;itdegradestheplasticandcanseepoutthesealorthreadsovertime.Keepthemcleansoyoucandrainexcessfuelintothetankwithoutcontaminatingyourfuel.

Ifaspillbucketisfullofwateritcannotcontainaspill.

Whatshouldyoulookfor?Anyoneofthefollowing:

‣ waterorfuelinthebottom–removeit;‣ debrisofanykindthatdoesn’tbelong

there–removeit;‣ brokenordamageddrainvalve–repairit;

and‣ anyholesorcracksinside‐wallsor

bottom–replacethespillbucket.

Overfill PreventionIfdeliverydriversorUSTownersmakefueldeliverymistakes,atankcanbeoverfilledquicklyandlargevolumescanbereleasedatthefillpipeandthroughloosefittingsonthetopofthetankoralooseventpipe.

Overfillsusuallyresultfromhumanerrorandcanbeavoidedifeveryoneinvolvedinthefueldeliveryfollowsindustrystandardpracticesfortankfilling.

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Spillbucketequippedwithdrain(A)andaspillbucketequippedwithapump(B).

A B

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Overfillsusuallyreleasemuchlargervolumesthanspills.Whenatankisoverfilled,largevolumescanbereleasedatthefillpipeandthroughloosefittingsonthetopofthetankoralooseventpipe.Note:Thetightnessofthesefittingsnormallyisnotaproblemifthetankisnotfilledbeyonditscapacity.

Accidentallyoverfillinganundergroundstoragetankcanhappenveryquicklyiftheproperoverfillprotectionmeasuresarenotfollowed.

Thinkaboutthefillingprocess:Ahosefroma10,000‐gallontankertruckisconnectedtoafillpipe.Ifthefillprocessisgravity‐driven(andmostare),thedriverturnsavalvetoopenahoseandthefuelflowsin–atabout300gallonsaminute.

Nowimagineifthere’snotenoughroominthetank—someonedidn’tmeasurethecorrectliquidlevel,orthewrongtankisbeingfilled:ineithersituation,anoverfillwilloccur–atabout300gallonsaminute!

Ownersandoperatorscanpreventthepotentialforoverfillproblemsby:

‣ ensuringthereisenoughroominthetankforthedeliverybeforethedeliveryismade;

‣ watchingtheentiredeliverytopreventoverfillingorspilling;and

‣ usingoverfillprotectiondevices.

OverfillPreventionEquipmentYourUSTmusthaveoverfillprotection.

The water tap on

a bathtub flows at approximately 5 gallons per minute. Filling the average American bathtub at

300 gallons per minute would take

less than 10 seconds!

NewUSTsmusthaveoverfillprotectiondeviceswhentheyareinstalled.OlderUSTsshouldhavebeenupgradedby1998withspillandoverfillpreventiondevices.

Overfillpreventiondevicesworkinoneofthreeways:Placedinthefillpipe,theystoptheflowoffuel.Installedintheventpipe,theysloworrestricttheflowoffuel(butdonotstopitentirely).Alarmsneitherstopnorrestrictflowinandofthemselves,butalertthedriver(andpotentiallytheoperator)thatthetankisnearlyfull.

Thethreemaintypesofoverfillprotectiondevicesare:

1. Automaticshutoffdevices(stopstheflowoffuel)

2. Ballfloatvalves(slowstheflowoffuel)3. Overfillalarms(alertsthedriver).

AutomaRcShutoffDevicesOfthethreetypesofoverfillprotectiondevices,theautomaticshutoffdevice(ASD)istheonlyonecapableofcompletelystoppingtheflowoffuel.DependingonthetypeofASDinstalled,itmayslowtheflowoffuelbeforestoppingitorbesettotrip,stoppingtheflowabruptly.

Federalregulation40CFR280.20(c)(ii)requiresoverfillpreventionequipmentthatwill:

‣ Automaticallyshutoffflowintothetankwhenthetankisnomorethan95percentfull;or

‣ Alertthetransferoperatorwhenthetankisnomorethan90percentfullbyrestrictingtheflowintothetankortriggeringahigh‐levelalarm;or

‣ Restrictflow30minutespriortooverfilling,alerttheoperatorwithahigh‐levelalarm1minutebeforeoverfilling,orautomaticallyshutoffflowintothetanksothatnoneofthefittingslocatedontopofthetankareexposedtoproductduetooverfilling.

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Builtintothefillpipe,theASDisessentiallyatubeinsideofwhichisavalve(oftencalleda“flapper”valve)connectedtoafloat.Asthefuellevelrises,itliftsthefloatfromaverticaltohorizontalposition.Whenthetankisnearlyfull(inNevada,therequiredsettingisatamaximumof95%capacity),thefloatarmisatfullheight,andtheshutoffvalveiscompletelyclosed.

IfyouhaveanASDinstalledonyourtank,lookdownthefillopeningandseeifyoucanspotthemechanism.

Ifyouhaveatwo‐valvesystem,afterthemainvalvecloses,abypassvalveallowsasmallamountofproducttoflow(5to10

gallonsperminute)sothatthehosecanbedrained.Ifthedeliverycontinuesbeyondacertainlevel,thebypassvalvealsocloses.

Anopenautoma/cshutoffvalve(A),andclosed(B).

A B

Oncethebypassvalvecloses(onatwo‐valvesystem)orthemainvalveshuts(onaone‐valvesystem),fuelistrappedinthehose.

Thispreventsanoverfill,butthebackupoffuelupthehosemeansthereisnoplaceforthefueltogo(recallthatmosttanksaregravityfilledandfuelcan’tbepumpedbackintothetruck).Asaresult,thehosemustremainconnectedtothetankuntilfuellevelsinthetankdropenoughforthefloattorelax,releasingtheshutoffvalveandallowingtheremainderofthefueltoflowintothetank.

Ifanoverfilldoesoccur,solongasthedeliveryhoseistight,thereshouldn’tbeaspillontheground—atleastuntilthehoseisdisconnected.Beawarethatthereisalotmorefuelinthehosethanwillfitinthespillbucket.

HavinganASDdoesn’tguaranteethatanoverfillwon’thappen.Commonsourcesoffailureinclude:

‣ Brokendevice;‣ Devicebypassedbystickorotherobject;

and

Automatic shutoff devices are commonly referred to as

drop-tube devices or “flapper”

valves.

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Ballfloatvalve.Overfillalarm. Automa/cshutoffdevices.

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‣ Deviceinstalledwrongoratincorrectheight.

Sometimesattemptsaremadetooverridetheoverfilldevicebyusingastickorotherobjecttoforcethefloatmechanismdownandkeepthevalveopen.Thiscanoccurifthevalvehasactivatedanddeliverypersonnelareforcedtowaituntilthefuelclearsthehose,orifthevalvehasn’tshutofftheflowoffuel,butisslowingdownanormaldelivery.

Abypassedorbrokendeviceincreasesthechancesofanoverfillthatresultsinasignificantspill.Beawarethatowners(notdrivers)areliableforspillsandoverfillsthatoccurduringdelivery.

EPAsproposedregulationsrequirethatyouhavetheautomaticshutoffcheckedforproperproductlevelheightsettingatleastonce,andthenonceayearhaveatechnicianorthirdpartyinspectorvisuallyinspectthedevice.Keepacopyofyourtestresultsandcorrectanyproblems.

EPAalsoproposestorequirethatUSTownersandoperatorsinspectoverfillpreventionequipmentforfunctionandfillpipesforpotentialobstructionsevery30days.

BallFloatValves

Recallthatalltanksareventedandthattheventpipespreventthebuildupofpressureinthetankbyallowingpetroleumvaporstoescape.Duringafueldelivery,thetank“exhales”outtheventasthefuelcomingintothetankdisplacesthepetroleumvaporsandpushesthemout.

Ballfloatsconsistofashortlengthofpipethatextendsdownintothetopofthe

Ball float valves

are also known as float-vent valves.

tankfromtheventopening.Typicallyawirecagecontainingahollowballisfastenedtothelowerendofthepipe.Theballsitsbelowtheendofthepipewithinthewirecage.Aslongastheproductisbelowthatoftheball,thetankventpiperemainsopenandthetankcanbreathe.

Ifthefuellevelistoohigh,theballfloatsupandblockstheventopening(inNevada,theballfloatvalvemustac/vate

whenthetankisnomorethan90%full).

Withthetankbeingunableto“exhale”asitnormallydoes,itbecomesmoredifficulttofillthetank,whichshouldalertthedrivertoclosethetruck’sshutoffvalve.

Whenyourelyonaballfloatventvalve,youwanttowatchoutforthefollowing:

‣ Theballismissing.Thecagecanrustoutorbecomebentoutofshape;

‣ Theballwon’tfloat.Itcanrustontothecageorcorrodethroughandfillwithproduct;

‣ Thevalveisinstalledwrongoratincorrectheight;

‣ Aremotefillopeningorothertank‐topriserisnotliquid/ght.Thisallowsthetanktoexhaleevenauerthefuellevel

Illustra/onofhowaballfloatventvalveoperates.

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pushestheballintotheventopening,preven/ngapressurebuildupfromsignalingthatthetankisfull.

Ballfloatsareincompa/blewith:

‣ Suctionpiping–productcanbeforcedouttheaireliminator,

‣ Pressurizeddeliveries–itcouldblowyourtankoutattheseams,

‣ Stage1coaxialdroptube–itcanpushfuelupthevaporreturnintersticeandbackintothetruck.

Ifyourfacilityhastwo‐pointvaporrecoverywithaballfloat,ensurethatthevaporrecoverypoppetremainsfreeofrocksorotherobstructionsasthesedisabletheballfloatdeviceandcanbeanairqualityviolation.

Wesuggestthatyouhavetheballfloatventvalvecheckedforproperproductlevelheightsefngatleastonce,andthenonceayearhaveatechnicianorthirdpartyinspectorvisuallyinspectthedevicetomakesuretheballiss/lldoingwhatit’s supposedtodo.Keepacopyofyourtestresultsandcorrectanyproblems.

OverfillAlarmsOverfillalarmsdon’tstopfuelfromflowing,buttheydoalertthedriverthatanoverfillincidentisabouttooccur.Ofthethreeoverfillpreventiontechnologies,theyarethemostversatileinthattheycanbeusedwitheithergravityorpumpeddeliveriesandwithtightorlooseconnections.

Overfillalarmsuseprobesinstalledinthetank(seeillustration)toactivateanalarmwhenthetankiseither90percentfullorwithin1minuteofbeingoverfilled.Typicallyoverfillalarmsaretiedintoanautomatictankgaugingsystem(ATG).Thealarmmaybeeitherablinkingredlight,a

siren(mostcommon),orboth.Makesurethealarmislocatedwherethedrivercanseeorheariteasily.

Althoughnotrequired,someoverfillalarms aresettoactivateatmultiplelevels:

‣ 90%full:Highproductalarm(requiredminimumsetting–youhaveaboutaminute);

‣ 95%full:High‐highproductalarm(youhavelessthan1minute);and

‣ 100%full:Maxproductalarm(it’stoolate).

Overfillalarmsworkonlyiftheyalertthedriverattherighttimeandthedriverrespondsquickly.Problemswithoverfillalarmscaninclude:

‣ Overfillsettingincorrectlyprogrammedsothealarmgoesofftoolate.

‣ Communicationtothetankgaugeisn’tworking.

‣ Alarmboxmalfunctioningorbroken.Driverisn’tnearbytohear/seealarmandrespond.

‣ Overfillalarmactivatesbutnooneresponds.

‣ Overfillalarmconnectedtoanelectricalcircuitthatcanbeturned“off”orthatdoesnotalertifacircuitbreakeristripped.

Wesuggestthatyouhavetheoverfillalarmcheckedforproperproductlevelheightsettingatleastonce,andthenonceayearhaveatechnicianorthirdpartyinspectorfunction‐testthealarmbox,thewiring,andthefloat.Keepacopyofyourtestresultsandcorrectanyproblems.

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TABLE5.2.OVERFILLPREVENTIONDEVICES:FUNCTIONALREQUIREMENTS

OVERFILLPREVENTIONDEVICES:FUNCTIONALREQUIREMENTSOVERFILLPREVENTIONDEVICES:FUNCTIONALREQUIREMENTS

What USTmusthaveatleastonedevicefromthelistbelow:‣ automaticallyshutoffflowintothetankwhenthetankisnomorethan95

percentfull;or‣ restricttheflowintothetankortriggeringahigh‐levelalarmwhenthetank

isnomorethan90percentfull;or‣ restrictflow30minutespriortooverfilling,alerttheoperatorwithahigh‐

levelalarm1minutebeforeoverfilling,orautomaticallyshutoffflowintothetank.

How ‣ Automaticshutoffdevices(mustshutoffflowwhentankis≤95%full)‣ Ballfloat(vent)valves(mustrestrictflowwhentankis≤90%full)‣ Overfillalarms(mustalarmwhentankis≤90%full)

When Requiredattankinstalla/onfortanksinstalledauer1986;Requiredupgradetoexis/ngtankssince1998

Why Federal40CFR280.20(c)(ii)‐ Spillandoverfillpreven/onequipment40CFR280.30‐SpillandOverfillControl(Owner’sResponsibili3es)

Who Ownerresponsibleforhavingproperdevice.

NOTE Manufacturersdonotrecommendusingballfloatvalveswithsuc3onpiping,pressurizeddelivery,orcoaxialStageIvaporrecovery.

Owner/OperatorResponsibilitiesinPreventingOverfillsAsthepersonwhoislegallyresponsibleforensuringthatoverfillsdonothappenduringfueldeliveriesatyourUSTfacility,developawridendeliveryprocedurethatallpersonnelinvolvedinthedeliveryprocessfollow.Thisprocedureshouldincludethefollowingmeasures:

Ensurethereisenoughroominthetankbeforeeachdelivery.Measurethefuellevelinyourtank(s)beforeeachdelivery.Knowtheworkingcapacityofyourtank(s).(Theworkingcapacityistheamountoffuelthetankwillholdwithouttriggering

theoverfillpreven/ondevice).Ifyouhaveatankgauge,orderyourfuelbasedonthe90%ullagereadingfromthetankgauge.

Monitorallfueldeliveriesfrombeginningtoend.Deliverydriversmaybemorecarefulifsomeoneiswatching.Usesecuritycamerastomonitorthedeliveryprocessandletthedriversknowthattheyareoncamera.

Inspectyourspillbucketsrou1nely.Ifnecessary,cleanbeforeandaiereachproductdelivery.

Respondtoalloverfillindica1ons.Ifatankgaugeisaler/ngtoanoverfill,makesurebothyourstaffandthedriverrespondappropriately.Neverignoreanalarm.Anoverfillmeansyouhaveordered

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toomuchfuel;re‐evaluatethemethodsusedtocalculatehowmuchfueltoordertopreventafutureoverfill(orpoten/alspill).

Prepareforspillsthatcanoccurdespiteawell‐func1oningoverfillpreven1onsystem.Hosescanbreak,adrivercandisconnectahosewithoutrealizingthetankisover‐filled,oralooseriser

somewhereonatankcanpreventaballfloatvalvefromfunc/oning.Makesureyouhaveanemergencyplaninplaceforwhattodoifanoverfilloccursandthatdeliverydrivers,operators,andotherpersonnelareawareoftheproceduresandtheirresponsibili/esincaseofanoverfillemergency.

TABLE5.3SPILLANDOVERFILLPREVENTIONDEVICES:OPERATORINSPECTION

SPILLANDOVERFILLPREVENTIONDEVICES:OPERATORINSPECTIONSPILLANDOVERFILLPREVENTIONDEVICES:OPERATORINSPECTIONSPILLANDOVERFILLPREVENTIONDEVICES:OPERATORINSPECTION

What Checkspillandoverfillpreven/onequipmentforfunc/onandobstruc/ons.Checkspillandoverfillpreven/onequipmentforfunc/onandobstruc/ons.

How SpillBuckets‣ Lidsareingoodcondition,fittightly‣ Shouldn’thaveanyvisibleholes,cracks,or

damagedareas‣ Shouldn’tbedeformedorwarped‣ Basinshouldbeclean,dry,andfreefromdebris

OverfillPreventionEquipment‣ Allfillsareunobstructed‣ Automaticshutoffvalvesorballfloats

arepresentandfunctional‣ Overfillalarmisproperlylocatedand

clearlyidentified

When ‣ Required:Atinstallation(ifrequiredbymanufacturer)‣ Proposed:Atinstallation(regardlessofmanufacturer’srequirements)‣ Proposed:Every30days‣ Proposed:Testspillpreventionequipmentatleastonceevery12months

‣ Required:Atinstallation(ifrequiredbymanufacturer)‣ Proposed:Atinstallation(regardlessofmanufacturer’srequirements)‣ Proposed:Every30days‣ Proposed:Testspillpreventionequipmentatleastonceevery12months

Why Federal:40CFR280.37(proposed)40CFR280.35(proposed)

Federal:40CFR280.37(proposed)40CFR280.35(proposed)

Who ClassBOperatorortheirdesignee.ClassBOperatorortheirdesignee.

NOTE Proposedfederalregula3onswillrequireoperator“walkthrough”inspec3onsofspillandoverfillpreven3onequipmentevery30daysandhavespillpreven3onequipmenttestedatleastonceevery12months.

Proposedfederalregula3onswillrequireoperator“walkthrough”inspec3onsofspillandoverfillpreven3onequipmentevery30daysandhavespillpreven3onequipmenttestedatleastonceevery12months.

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