Occupational Exposure to Occupational Exposure to Metalworking Fluids Metalworking Fluids Presented at the Occupational Presented at the Occupational Hygiene Association of Ontario Hygiene Association of Ontario Spring Symposium Spring Symposium March 28, 2007 March 28, 2007 By Lorraine Shaw, B.Sc., CIH, ROH By Lorraine Shaw, B.Sc., CIH, ROH Occupational and Environmental Occupational and Environmental Health Laboratory, Health Laboratory, McMaster University McMaster University
Occupational Exposure to Metalworking Fluids. Presented at the Occupational Hygiene Association of Ontario Spring Symposium March 28, 2007 By Lorraine Shaw, B.Sc., CIH, ROH Occupational and Environmental Health Laboratory, McMaster University. Outline. Overview - PowerPoint PPT Presentation
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Occupational Exposure to Metalworking Occupational Exposure to Metalworking FluidsFluidsPresented at the Occupational Presented at the Occupational Hygiene Association of Ontario Hygiene Association of Ontario
Occupational and Environmental Occupational and Environmental Health Laboratory, Health Laboratory,
McMaster UniversityMcMaster University
OutlineOutlineOverviewOverview
Types of MWF, Health Effects, Standards, Types of MWF, Health Effects, Standards, Exposure AssessmentExposure Assessment
Objectives of the StudyObjectives of the StudyMethodology Methodology
Selection of Plants, Laboratory Investigation, Selection of Plants, Laboratory Investigation, Field Investigation, QC and StatisticsField Investigation, QC and Statistics
ResultsResults Laboratory and Field ResultsLaboratory and Field Results
ACGIH TLV-TWA (Mineral Oil) in 2006 notice of intended ACGIH TLV-TWA (Mineral Oil) in 2006 notice of intended changes :changes :Mineral Oil Used in metal workingMineral Oil Used in metal workingPoorly and mildly refined 0.2 mg/mPoorly and mildly refined 0.2 mg/m33 (Inhalable) (Inhalable) A2A2Highly and severely refined 0.2 mg/mHighly and severely refined 0.2 mg/m33 (Inhalable) (Inhalable) A4A4
Proposed NIOSH REL for all types of MWF (1998):Proposed NIOSH REL for all types of MWF (1998): 0.5 mg/m0.5 mg/m33(Total) (Total)
ObjectivesObjectivesAssess and Validate Analytical MethodsAssess and Validate Analytical MethodsAssess Air Sampling MethodsAssess Air Sampling MethodsCollect Current Representative Occupational Collect Current Representative Occupational
Exposure DataExposure DataAssess Exposure ExceedanceAssess Exposure ExceedanceCompare Ontario Exposure with Published DataCompare Ontario Exposure with Published Data
• % Exceedance is based on log normal distribution
ze = -log(GM/STD) / log(GSD)
Relationship of Total vs ThoracicRelationship of Total vs Thoracic
Conclusions Conclusions (I)(I)HSE method proved problematicBoth NIOSH method 0500 or 5524 can be usedpreferred method is the 5524Detection limits, sample recovery etc. were
similar to NIOSH studySamples should NOT be stored at Room TempSamples should be analyzed within 2 or 7 days
depending on storage temperature
Ratio of Thoracic to Total aerosol is about 0.7Range of exposures in Ontario (0.04 to 3.84
mg/m3) is similar to others (NIOSH & OSHA)Percent exceedance based on data set and
assumption of log normality is 38% with respect to NIOSH REL
Respiratory effects reported at levels below 0.5 mg/m3
Total Protection requires AIR, DERMAL and FLUID management
Conclusions Conclusions (II)(II)
Thank youThank you
This research study was This research study was funded by a grant from funded by a grant from
the WSIBthe WSIB
Thank youThank you
This research study was This research study was funded by a grant from funded by a grant from