【英文标准名称】:StandardGuideforPurgingMethodsforWellsUsedforGround-WaterQualityInvestigations
【原文标准名称】:用于地下水质调查的井的净化方法的标准指南
【标准号】:ASTMD6452-1999(2005)
【标准状态】:现行
【国别】:
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:水质;地下水;净化;指数剂参数;地下水取样
【英文主题词】:groundwater;ground-watersampling;indicatorparameters;purging;waterquality
【摘要】:Wellsusedinground-waterqualityinvestigationsormonitoringprogramsaregenerallypurgedpriortosampling(Note1).Purgingisdonetominimizethebiasassociatedwithstagnantwaterinthewell,whichgenerallydoesnotaccuratelyreflectambientground-waterchemistry(Note2).Note18212;Somesamplingmethods,suchaspassivesampling,donotrequirethepracticeofpurgingpriortosamplecollection(1,2).3Note28212;Thisguidedoesnotaddressthepracticeofpost-samplepurging(purgingagainaftersamplingiscompleted),whichisintendedforpurposesotherthantheminimizationofbiasassociatedwithstagnantwaterinthewell.Therearevariousmethodsforpurging.Eachpurgingmethodmayhaveadifferentvolumeofinfluencewithintheaquiferorscreenedinterval.Therefore,asamplecollectedafterpurgingbyanyonemethodisnotnecessarilyequivalenttosamplescollectedafterpurgingbytheothermethods.Theselectionoftheappropriatemethodwillbedependentonanumberoffactors,whichshouldbedefinedduringthedevelopmentofthesamplingandanalysisplan.Thisguidedescribesthemethodsavailableanddefinesthecircumstancesunderwhicheachmethodmaybeappropriate.1.1Thisguidecoversmethodsforpurgingwellsusedforgound-waterqualityinvestigationsandmonitoringprograms.Thesemethodscouldbeusedforothertypesofprogramsbutarenotaddressedinthisguide.1.2Thisguideappliesonlytowellssampledatthewell-head.1.3Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject''smanyuniqueaspects.Theword"Standard"inthetitleofthisguidemeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_10
【页数】:6P.;A4
【正文语种】: