EPA Method 306B

2198METHOD306B-SURFACETENSIONMEASUREMENTFORTANKSUSEDATDECORATIVECHROMIUMELECTROPLATINGANDCHROMIUMANODIZINGFACILITIESNOTE:Thismethoddoesnotincludeallofthespecifications(e.g.,equipmentandsupplies)andprocedures(e.g.,samplingandanalytical)essentialtoitsperformance.Somematerialisincorporatedbyreferencefromothermethodsin40CFRPart60,AppendixAandinthispart.Therefore,toobtainreliableresults,personsusingthismethodshouldhaveathoroughknowledgeofatleastMethods5and306.1.0ScopeandApplication.1.1Analyte.Notapplicable.1.2Applicability.Thismethodisapplicabletoalldecorativechromiumplatingandchromiumanodizingoperations,andcontinuouschromiumplatingatironandsteelfacilitieswhereawettingagentisusedinthetankastheprimarymechanismforreducingemissionsfromthesurfaceoftheplatingsolution.2.0SummaryofMethod.2.1Duringanelectroplatingoranodizingoperation,gasbubblesgeneratedduringtheprocessrisetothesurfaceoftheliquidandburst.Uponbursting,tinydropletsofchromicacidbecomeentrainedinambientair.Theadditionofawettingagenttothetankbathreducesthesurface2199tensionoftheliquidanddiminishestheformationofthesedroplets.2.2Thismethoddeterminesthesurfacetensionofthebathusingastalagmometeroratensiometertoconfirmthatthereissufficientwettingagentpresent.3.0Definitions.[Reserved]4.0Interferences.[Reserved]5.0Safety.5.1Disclaimer.Thismethodmayinvolvehazardousmaterials,operations,andequipment.Thistestmethodmaynotaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheusertoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortoperformingthistestmethod.6.0EquipmentandSupplies.6.1Stalagmometer.Anycommerciallyavailablestalagmometerorequivalentsurfacetensionmeasuringdevicemaybeusedtomeasurethesurfacetensionoftheplatingoranodizingtankliquid.6.2Tensiometer.AtensiometermaybeusedtomeasurethesurfacetensionofthetankliquidprovidedtheproceduresspecifiedinASTMMethodD1331-89,StandardTestMethodsforSurfaceandInterfacialTensionofSolutionsof2200SurfaceActiveAgents(incorporatedbyreference--see§63.14)arefollowed.7.0ReagentsandStandards.[Reserved]8.0SampleCollection,SampleRecovery,SamplePreservation,SampleHoldingTimes,Storage,andTransport.[Reserved]9.0QualityControl.[Reserved]10.0CalibrationandStandardization.[Reserved]11.0AnalyticalProcedure.11.1Procedure.Thesurfacetensionofthetankbathmaybemeasuredbyusingatensiometer,astalagmometeroranyotherequivalentsurfacetensionmeasuringdeviceapprovedbytheAdministratorformeasuringsurfacetensionindynespercentimeter.Ifthetensiometerisused,theproceduresspecifiedinASTMMethodD1331-89mustbefollowed.Ifastalagmometerorotherdeviceisusedtomeasuresurfacetension,theinstructionsprovidedwiththemeasuringdevicemustbefollowed.11.2FrequencyofMeasurements.11.2.1Measurementsofthebathsurfacetensionareperformedusingaprogressivesystemwhichdecreasesthefrequencyofsurfacetensionmeasurementsrequiredwhenthepropersurfacetensionismaintained.11.2.1.1Initially,followingthecompliancedate,2201surfacetensionmeasurementsmustbeconductedonceevery4hoursoftankoperationforthefirst40hoursoftankoperation.11.2.1.2Oncetherearenoexceedancesduringaperiodof40hoursoftankoperation,measurementsmaybeconductedonceevery8hoursoftankoperation.11.2.1.3Oncetherearenoexceedancesduringasecondperiodof40consecutivehoursoftankoperation,measurementsmaybeconductedonceevery40hoursoftankoperationonanon-goingbasis,untilanexceedanceoccurs.Themaximumtimeintervalformeasurementsisonceevery40hoursoftankoperation.11.2.2Ifameasurementofthesurfacetensionofthesolutionisabovethe45dynespercentimeterlimit,oraboveanalternatesurfacetensionlimitestablishedduringtheperformancetest,thetimeintervalshallrevertbacktotheoriginalmonitoringscheduleofonceevery4hours.AsubsequentdecreaseinfrequencywouldthenbeallowedaccordingtoSection11.2.1.12.0DataAnalysisandCalculations.12.1LogBookofSurfaceTensionMeasurementsandFumeSuppressantAdditions.12.1.1ThesurfacetensionoftheplatingoranodizingtankbathmustbemeasuredasspecifiedinSection11.2.12.1.2Themeasurementsmustberecordedinthelog2202book.Inadditiontotherecordofsurfacetensionmeasurements,thefrequencyoffumesuppressantmaintenanceadditionsandtheamountoffumesuppressantaddedduringeachmaintenanceadditionmustberecordedinthelogbook.2.1.3Thelogbookwillbereadilyavailableforinspectionbyregulatorypersonnel.12.2InstructionsforApparatusUsedinMeasuringSurfaceTension.12.2.1Includedwiththelogbookmustbeacopyoftheinstructionsfortheapparatususedformeasuringthesurfacetensionoftheplatingoranodizingbath.12.2.2Ifatensiometerisused,acopyofASTMMethodD1331-89mustbeincludedwiththelogbook.13.0MethodPerformance.[Reserved]14.0PollutionPrevention.[Reserved]15.0WasteManagement.[Reserved]16.0References.[Reserved]17.0Tables,Diagrams,Flowcharts,andValidationData.[Reserved]