WPCF e߬9%ړLԄs7oo 8^p葑~Ц ɆE 0ER_F9\Uzeb E+MM[g ث0Cnam&\u9G2/g䯑`7`}&)e1w k9 ݛ&*4\f(\ z|=1k 2q5GKKVCS7 ߓ!$m鄯tҥz;8ewV9ᢒ蠴#dQsޭN.ore.`9#& ]j2j5D%Dm.w4~UBuH⪫fLSMKɰUCrp^*fBnL+3(Û.[ k[j$juL;<\P)'?Xē^zV($ >{k~K݋q/`KZ; #UNy % 0:N^ w4- m/#|xHP LaserJet 2200 Series PCL 60(9 Z6Times New Roman RegularX($USUS.,Dkm- V,ertyBarTU !USUS.,  _TITLE  ComparisonofMethodstoDetermineDislodgeableResidueTransfer  fromFloors  AUTHOR(S) ` DavidE.Camann,H.J.Harding,P.W.Geno,andS.R.Agrawal L  PERFORMINGORGANIZATIONNAMEANDADDRESS $ t SouthwestResearchInstitute  ` SanAntonio,TX78228-0510  L  SPONSORINGAGENCYNAMEANDADDRESS $  NationalExposureResearchLaboratory   OfficeofResearchandDevelopment   U.S.EnvironmentalProtectionAgency   ResearchTrianglePark,NC27711   ABSTRACT \ Threemethodswereevaluatedformeasurementoffreshly-applied H pesticideresiduesoncarpetedandvinylfloors.Testswere 4 conductedtodeterminetherelativeperformanceofthethree  p methodsforremovalofdislodgeableresiduesandtocomparethem  \ withhumanskin.TheDowdragsledandtheSouthwestResearch H Institutepolyurethanefoam(PUF)rollerperformedbetterthanthe 4 Californiaclothroller.Moisteningthesamplingmediaincreased   thetransferbythedragsledandthePUFroller,butsubstantially   increasedmeasurementvariability.Anisopropanolhandwipemethod  efficientlyremoveddriedpesticideresiduesfromthehandso  volunteers(104%ofchlorpyifos,92%ofpyrethrinI).  BoththedragsledandthePUFrollerwerefoundtobeacceptable X  dislodgeableresiduemethodsonthebasisofthesestudies.The D! transferefficiencyofthedragsledconsistentlyexceededthe 0"  transferefficiencyofthePUFroller,whichconsistencyexceeded #l! thetransferefficiencyofhumanhandpresses.Thisrelationship $X" wasobservedforavarietyofpesticides,loadings,application $D # methods,andsurfaces.Thepliablepolyurethanefoamsampling %0!$ surfaceofthePUFrollerwithitsrollingactionislikelyto &"% bettersimulatehumanskininitstransferviacontactwith '#& surfacesthanisthedenimclothoftheDowsledwithitsdrag (#' action.Eithermechanicalmethodcanbeusedtoestimatedermal )$( transferofpesticideresiduesfromrecentlytreatedfloors. |*%) Round-robintestingofthedragsledandPUFrollerbypotential h+&* registrantsunderstrictQA/QCguidancefromEPAisrecommended. T,'+ _ @-(, Ї