Designation:D6429−99(Reapproved2011)´1StandardGuideforSelectingSurfaceGeophysicalMethods1ThisstandardisissuedunderthefixeddesignationD6429;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.´1NOTE—EditoriallyrevisedSection3inJuly2011.1.Scope1.1Thisguidecoverstheselectionofsurfacegeophysicalmethods,ascommonlyappliedtogeologic,geotechnical,hydrologic,andenvironmentalinvestigations(hereafterre-ferredtoassitecharacterization),aswellasforensicandarchaeologicalapplications.Thisguidedoesnotdescribethespecificproceduresforconductinggeophysicalsurveys.Indi-vidualguidesarebeingdevelopedforeachsurfacegeophysicalmethod.1.2Surfacegeophysicalmethodsyielddirectandindirectmeasurementsofthephysicalpropertiesofsoilandrockandporefluids,aswellasburiedobjects.1.3Thegeophysicalmethodspresentedinthisguideareregularlyusedandhavebeenproveneffectiveforhydrologic,geologic,geotechnical,andhazardouswastesiteassessments.1.4Thisguideprovidesanoverviewofapplicationsforwhichsurfacegeophysicalmethodsareappropriate.Itdoesnotaddressthedetailsofthetheoryunderlyingspecificmethods,fieldprocedures,orinterpretationofthedata.Numerousreferencesareincludedforthatpurposeandareconsideredanessentialpartofthisguide.Itisrecommendedthattheuserofthisguidebefamiliarwiththereferencescited(1-20)2andwithGuidesD420,D5730,D5753,D5777,andD6285,aswellasPracticesD5088,D5608,D6235,andTestMethodG57.1.5Toobtaindetailedinformationonspecificgeophysicalmethods,ASTMstandards,otherpublications,andreferencescitedinthisguide,shouldbeconsulted.1.6Thesuccessofageophysicalsurveyisdependentuponmanyfactors.Oneofthemostimportantfactorsisthecompetenceoftheperson(s)responsibleforplanning,carryingoutthesurvey,andinterpretingthedata.Anunderstandingofthemethod’stheory,fieldprocedures,andinterpretationalongwithanunderstandingofthesitege...
