Designation:D4044/D4044M−15StandardTestMethodfor(FieldProcedure)forInstantaneousChangeinHead(Slug)TestsforDeterminingHydraulicPropertiesofAquifers1ThisstandardisissuedunderthefixeddesignationD4044/D4044M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthefieldprocedureforperform-inganinsituinstantaneouschangeinhead(slug)test.1.2Thistestmethodisusedinconjunctionwithananalyti-calproceduresuchasTestMethodD4104todataanalysisandtodetermineaquiferproperties.1.3Units—ThevaluesstatedineitherSIUnitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesineachsystemmaynotbeexactequivalents;thereforeeachsystemshallbeusedindependentlyoftheother.Combin-ingvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.ReportingoftestresultsinunitsotherthanSIshallnotberegardedasnonconformancewiththistestmethod.1.4AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.4.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthestandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsider-ationsfortheuser’sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthesetestmethodstoconsidersignificantdigitsusedinanalysismethodsforengineeringdata.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2...
