Chrysotile Asbestos Consensus Statement and

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34Somelimitationsofmeta-analysesinoccupa tionalasbestosstudies~ , 'stypicalchrysotileasbestosexposureinCan ada, ,suchascredibilityrangesor,wherepossible , "TypicalexposuresinCanada" (byphasecontrastopticalmicroscopy), (bytransmissionelectronmicroscopy)."Trem olite"meansfibrousformsofmineralsinthetr emolite-ferroactinoliteseries."Amphibole s"meanstremolite, , "tremolite-freechrysotile"whereitisneces sarytodistinguishchrysotilewithouttremol ite, ,participantswereinstructedtoconsidertre molite-freechrysotile, ,whenconsideringtheroleoftremoliteinexpo surerisks, , ,Quebec,Canada, , , , , , , ,byBermanandCrump!,referredtohereasB&C,w ascommissionedbytheUSIBennanOW, :Technicalsupportdocumentforaprotocoltoa ssessasbestos-relatedrisk; , # , ,byHodgson&Darnton2,referredtohereasH&D, isbytwomembersofstaffoftheBritishHealtha ndSafetyExecutive, ,some60relevant,mostlyrecent,papersweres ubmittedbyanddistributedtomembersofthepa nel, :(1)amphiboles,whichincludecrocidolitean damosite;and(2) , , ,surfacechemistry,andbiopersistence(whic hmodulatescumulativeexposure) , , , ,whichisanamphibole, ,DamtonAI, (2000); (8) ,andthisissupportedbyStayneretaI's(2007) ,theconventionalopticalmicroscopemethodo fmeasuringairborneasbestosgivesequalweig httoallfibreslongerthan5micrometres,does notcountfibresshorterthanthis, ,andmayhaveadifferentrelationwithriskind ifferentstudies, ,participantsreferredoftentotheH&DandB&C reviews, ,orinterprets, ,participantssaidth

typical chrysotile asbestos exposure in Canada, and to give an opinion on how the proportion of tremolite in commercial chrysotile influences the exposure-response relationship between chrysotile and …

  Asbestos, Chrysotile, Chrysotile asbestos