Designation:D6469−20StandardGuideforMicrobialContaminationinFuelsandFuelSystems1ThisstandardisissuedunderthefixeddesignationD6469;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisguideprovidespersonnelwhohavealimitedmicrobiologicalbackgroundwithanunderstandingofthesymptoms,occurrence,andconsequencesofchronicmicrobialcontamination.Theguidealsosuggestsmeansfordetectionandcontrolofmicrobialcontaminationinfuelsandfuelsystems.Thisguideappliesprimarilytogasoline,aviation,boiler,industrialgasturbine,diesel,marine,furnacefuelsandblendstocks(seeSpecificationsD396,D910,D975,D1655,D2069,D2880,D3699,D4814,D6227,andD6751),andfuelsystems.However,theprinciplesdiscussedhereinalsoapplygenerallytocrudeoilandallliquidpetroleumfuels.ASTMManual472providesamoredetailedtreatmentoftheconceptsintroducedinthisguide;italsoprovidesacompilationofallofthestandardsreferencedhereinthatarenotfoundintheAnnualBookofASTMStandards,SectionFiveonPetroleumProductsandLubricants.1.2Thisguideisnotacompilationofalloftheconceptsandterminologyusedbymicrobiologists,butitdoesprovideageneralunderstandingofmicrobialfuelcontamination.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1AS...
