Designation:D4347–84(Reapproved1995)StandardPracticeforCollectingBenthicMacroinvertebrateswithShipek(Scoop)GrabSampler1ThisstandardisissuedunderthefixeddesignationD4347;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheproceduresforobtainingquali-tativeorquantitativesamplesofmacroinvertebratesinhabitingsand,gravel,mud,clay,andsimilarsubstrates.1.2Thisdeviceisusedprimarilyinestuarinehabitatsandlargefreshwaterlakes.1.3Fortheadvantagesandlimitationsofgrabsamplingdevices,seeGuideD4387.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazards,seeSection5.2.ReferencedDocuments2.1ASTMStandards:D4387GuideforSelectingGrabSamplingDevicesforCollectingBenthicMacroinvertebrates23.SummaryofPractice3.1TheShipekscooptypegrabsamplerconsistsofasemicylindricalscoopandmustbepositionedproperlyonthebottomtotakeascoopandretaindiscretesamplesofsedimentthrough180°.3.2Thescoopofthisdevicepenetratestoadepthofabout10.2cmatcenter.3.3Unlikemanyothertypesofsamplers,closureofthedeviceismadeattheside,ratherthanatthebottom.4.SignificanceandUse4.1TheShipek(scoop)grabsamplerisusedtocollectqualitativeandquantitativesamplesfromdifferentaquatichabitatscontainingbenthicmacroinvertebrateslivingonorinvarioustypesofsubstrates.4.2Theorganismsinthesampleareusedtodefinemacro-invertebratecommunitycharacteristicsinwaterqualitystudiesandecologicalassessments.5.Hazards5.1Thissamplercannotbeusedunderadversewindandwaveconditions.5.2Thesamplerrequiresavesselwithawinchandcable.6.Procedures6.1Thesamplermustbeloweredonanearverticalline.6.2Thesampleriscomposedoftwoconcentrichalfcylin-d...
