Designation:D6724−04(Reapproved2010)StandardGuideforInstallationofDirectPushGroundwaterMonitoringWells1ThisstandardisissuedunderthefixeddesignationD6724;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidedescribesvariousdirectpushgroundwatermonitoringwellsandprovidesguidanceontheirselectionandinstallationforobtainingrepresentativegroundwatersamplesandmonitoringwatertableelevations.Directpushwellsareusedextensivelyformonitoringgroundwaterqualityinuncon-solidatedformations.Thisguidealsoincludesdiscussionofsomegroundwatersamplingdeviceswhichcanbepermanentlyemplacedasmonitoringwells.1.2ThisguidedoesnotaddressthesingleeventsamplingofgroundwaterusingdirectpushwatersamplersaspresentedinGuideD6001.Themethodsinthisguideareoftenusedwithothertestssuchasdirectpushsoilsampling(GuideD6282)andtheconepenetrometertest(GuideD6067).ThepresentguidedoesnotaddresstheinstallationofmonitoringwellsbyrotarydrillingmethodssuchasthosepresentedinPracticeD5092.TechniquesforobtaininggroundwatersamplesfrommonitoringwellsarecoveredinGuideD4448.1.3Theinstallationofdirectpushgroundwatermonitoringwellsislimitedtounconsolidatedsoilsandsedimentsinclud-ingclays,silts,sands,andsomegravelsandcobbles.Penetra-tionmaybelimited,ordamagemayoccurtoequipment,incertainsubsurfaceconditions;someofwhicharediscussedin5.5.Informationinthisguideislimitedtogroundwatermonitoringinthesaturatedzone.1.4Thisguidedoesnotpurporttocomprehensivelyaddressallofthemethodsandissuesassociatedwithmonitoringwellinstallation.Usersshouldseekinputfromqualifiedprofession-alsfortheselectionofproperequipmentandmethodsthatwouldbethemostsuccessfulfortheirsiteconditions.Othermethodsmaybeavailableformonitoringwellinstallation,andqualifiedprofessionalsshouldhaveflexibilitytoexercisejudgementconcerningalternativesnotcovered...
