Document 2Nog3K1Z7bZRGBV0eMLX9Z6L7

14 March 1994 Ms. Anne Kearse Ness, Motley, Loadholt, Richardson & Poole 2202 Jackson Street Barnwell, SC 29812 Re: Grinding Wheel MVA Project No. 0831 Dear Anne: MVA, Inc., has performed the examination of a grinding wheel requested by your office. Our report is attached. If you have any questions, please do not hesitate to call. Sincerely, Thomas J. Hopen Senior Chemical Microscopist TJH/JRM/aw Attachment James R. Millette, Ph.D. Executive Director D:PROJECTS:0831:RPT0314 Report of Results: MVA0831 Examination of a Grinding Wheel Prepared for: Ness, Motley, Loadholt, Richardson & Poole 2202 Jackson Street Barnwell, SC 29812 Prepared by: MVA, Inc. 5500 Oakbrook Parkway, Suite 200 Norcross, GA 30093 14 March 1994 D:PROJECTS:0831:RPT0314 Grinding Wheel Report of Results: MVA0831 Introduction At the request of the firm of Ness, Motley, Loadholt, Richardson & Poole, Mr. Thomas J. Hopen of MVA, Inc., traveled to Buffalo, New York, to examine a pair of grinding wheels relative to the above referenced project. The examination took place on March 3, 1994, at the Buffalo Marriott Hotel. A hood was constructed with plastic sheets and a High Efficiency Particle Absolute (HEPA) vacuum was used to eliminate the possible release of asbestos fibers during the sampling. Mr. Hopen photographed the grinding wheels and then placed the grinding wheels under the hood for further examination utilizing a stereomicroscope. Samples were also collected from one of the grinding wheels and transferred to the MVA, Inc., laboratory in Norcross, Georgia, for analysis. Sample Description Two grinding wheels were examined. One was labeled "CARBORUNDUM". It appeared to have a steel inner area. The other was labeled "CARBORUNDUM BLACK MAGIC DIAMOND WHEEL ". It was inscribed with the number "768" and labeled MAX. R.P.M. 5182. See Appendix A. Only the Black Magic Diamond Wheel appeared to contain fibrous material and therefore particle samples were only collected from this wheel. These samples are described as follows: MVA # 0831-E0423 0831-E0424 -E0425 -E0426 0831-E0427 0831-E0428 Description Particles from the black (inner) area of the "CARBORUNDUM Black Magic Diamond Wheel" Samples collected of the loose material by adhesive samplers(1) in the area where MVA-E0423 was collected. Adhesive sample of the surface in an undisturbed area Blank adhesive sampler Analytical Procedures In the laboratory the particle samples were analyzed using a polarized light microscope. The adhesive lift samples were examined with a JEOL 6400 scanning electron microscope (SEM) equipped with a NORAN Voyager x-ray analysis system. D:PROJECTS:0831:RPT0314 Results The PLM analysis of the material sampled from the inner area of the Carborundum Black Magic Diamond Wheel showed it to be approximately 60% chrysotile asbestos. Based on this data and the on-site examination of the wheel, it is estimated that the material in the inner area of the Carborundum Black Magic Diamond Wheel is approximately 30% chrysotile asbestos. The SEM analysis of the Post-itTM note adhesive surfaces showed evidence of chrysotile asbestos. See Figures in Appendix B. Reference 1. Millette, J. R., Brown, R. S., Barnett, J., et al., Scanning Electron Microscopy of Post-itTM Notes Used for Environmental Sampling, NAC Journal 9 (1):32-35 (1991). D:PROJECTS:0831 :RPT0314 Page 2 APPENDIX A Photographs of the Grinding Wheels D:PROJECTS:0831 :RPT0314 Page 3 Figure A1. Carborundum Grinding Wheel with what appeared to be steel inner area. Figure A2. Carborundum Black Magic Diamond Wheel Grinding Wheel with black inner area D:PROJECTS:0831 :RPT0314 Page 4 * ^v1 v. " fife* - V #-'* y#. - ' CSL \* . ^ J jfx:*'** * '.t ` > '* \ v. V v * .* 2S '* ^W > Tv. ^ >W$*v* +r- 'v . .' * r ' c4*/ *>. * ?.v*i'Yr V ^ vl'* > ,, ?* * ^ * ** * . 7\ \ ^LV C- 'vV ' **&*; . r< "*t *** .T-i.^*2 , wigs mmuJEt Wmt; lalk' r* , .;4 Figure A3. Close-up view of grinding area (lower) and inner area (upper) of Black Magic Diamond Wheel Figure A4. Close-up view of inner area of Black Magic Diamond Wheel showing fiber bundles. D:PROJECTS:0831 :RPT0314 Page 5 APPENDIX B Scanning Electron Microscopy of Post-it Notes Collected From the Black Magic Diamond Wheel D:PROJECTS:0831 :RPT0314 Page 6 MVA, Inc. Post-itTM Note Analysis by SEM-EDS Date: 03/08/94 MVA #: 0831 MVA Sample ID #: E0424 Stereomicroscope Examination: Area Examined: Post-itTM note adhesive surface Findings: Moderate loading, areas with fiber bundles excised for SEM-EDS SEM Examination: Area Examined: Post-itTM adhesive surface Magnification: 100-50,000X Findings: Chrysotile asbestos fibers and fiber bundles are common Microscopist: R. S. Brown D:PROJECTS:0831 :RPT0314 Page 7 MVA, Inc. Post-itTM Note Analysis by SEM-EDS Date: 03/08/94 MVA #: 0831 MVA Sample ID #: E0427 Stereomicroscope Examination: Area Examined: Post-itTM note adhesive surface Findings: Lightly loaded; area with fiber bundle excised for SEM-EDS SEM Examination: Area Examined: Post-itTM adhesive surface Magnification: 100-50,000X Findings: Chrysotile fibers were detected Microscopist: R. S. Brown D:PROJECTS:0831 :RPT0314 Page 8 Figure B1. MVA0831-E0424: Secondary electron (SE) image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 100X. Figure B2. MVA0831-E0424: SE image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 350X. D:PROJECTS:0831 :RPT0314 Page 9 Figure B3. MVA0831-E0424: SE image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 500X. Figure B4. MVA0831-E0424: SE image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 1,500X. D:PROJECTS:0831 :RPT0314 Page 10 D:PROJECTS:0831 :RPT0314 Page 11 Figure B6. MVA0831-E0427: SE image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 100X. Figure B7. MVA0831-E0427: SE image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 500X. D:PROJECTS:0831 :RPT0314 Page 12 Figure B8. MVA0831-E0427: SE image of Post-it note adhesive surface showing chrysotile asbestos fibers. Magnification 1,500X. Figure B9. MVA0831-E0427: X-ray spectrum of chrysotile asbestos. D:PROJECTS:0831 :RPT0314 Page 13 APPENDIX C Polarized Light Microscopy of Particles Collected From the Black Magic Diamond Wheel D:PROJECTS:0831 :RPT0314 Page 14 MVA, Inc. PLM Constituent Analysis Date: 03/04/94 MVA #: 0831 Location: Sample I.D. #: E0423 Client Sample I.D. #: Examination using the stereomicroscope: Material sampled from the inner area of a grinding wheel (Black Diamond). CONSTITUENT Fibers: Cotton Fiberglass Filament Wool Mineral Wool Hair Paper/Wood Chem. Proc. Mech. Proc. Synthetic % CONSTITUENT Pigment: Binders: Kaolinite -- Montmorillonite -- Gypsum -- Anhydrite -- Portland Cement Lime (hydrated) -- Precipitated -- Carbonate -- Starch Other % CONSTITUENT Fillers: Diatoms -- Iron Chromite -- Iron Oxide -- Limestone -- Magnetite -- Mica -- Perlite Synthetic Foam -- Pumice -- Quartz ~ 40 Talc Vermiculite % -- -- --Minor* -- -- -- --- -- -- -- --- Chrysotile Amosite Asbestos Minerals ~ 60 Anthophyllite -- Crocidolite - - - Tremolite/ -- Actinolite --- Comments: The percents are based on the material that was sampled. The estimated percentage of chrysotile was approximately ~30% at the time of sampling. *The minor carbonate (limestone) percentage is included in the binder percentage. Analyst: T. Hopen D:PROJECTS:0831 :RPT0314 Page 15 Photomacrograph of sample MVA0831-E0423. (Total Magnification = 40X) Photomicrograph of sample MVA0831-E0423 showing chrysotile, fiber and binder material. (Total Magnification = 380X) D:PROJECTS:0831 :RPT0314 Page 16