Document 8Dn2a4O6XJ7VZ6wvbx1RkRMZ

MVA, Inc. V'. Excellence in -- Microanalysis 08 December 1992 Ms. Jennifer Wagner Richard F. Scruggs, P.A. 734 Delmas Avenue Pascagoula, MS 39568-1425 Re: Microscopic Analysis of a Sample of Asbestos Board Cut During the Micarta/Marinite Experiment MVA Project No. 0393 * -j ! Dear Ms. Wagner. I Enclosed please find a copy of our report on the microscopic examination of j Micarta/Marinite Board. If you have any questions, please do not hesitate to contact : me. j Thank you for consulting MVA, Inc. Sincerely, JRM/aw Enclosure James R. Millette, Ph.D. Executive Director MVA0393:RPT1208 5500 Oakbrook Parkway #200 Norcross, Georgia 30093 Telephone 404-662-8509 Facsimile 404-662-8532 Report of Results: MVA0393 Microscopic Analysis of a Sample of Asbestos Board Cut During the Micarta/Marinite Experiment Prepared for: Richard F. Scruggs, P.A. 734 Delmas Avenue Pascagoula, MS 39568-1425 Prepared by: MVA, Inc. 5500 Oakbrook Parkway, Suite 200 Norcross, GA 30093 08 December 1992 MVA0393:RPT1208 MVA, Inc. Excellence in -- Microanalysis 5500 Oakbrook Parkway #200 Norcross, Georgia 30093 404-662-8509 Introduction MVA Project No. 0393 Microscopic Analysis of a Sample of Asbestos Board Cut During the Micarta/Marinite Experiment Portions of the asbestos board cut during the Micarta/Marinite experiment for MVA, Inc. Project No. 0393 were examined by several microscopic techniques including stereo microscopy, polarized light microscopy (PLM), scanning electron microscopy (SEM), and fourier transform infrared microscopy (FTIR). The sample, identified as field sample number 2 and laboratory sample C4503 was found to be a multi-layered sample. Analytical Results Based on the analysis for asbestos using standard techniques of PLM and dispersion staining, the multi-layered nature of the material can be summarized as: Layer A - No asbestos in a tan consolidated material Layer B - Chrysotile in a gray consolidated material Layer C - Amosite in a white powdery material Layer D - Chrysotile in a gray consolidated material Layer E - No asbestos in a tan consolidated material Layers A and E were the same non-asbestos material. Layer B was the same material as Layer D The overall board material is a sandwich of decorative sheets on the outside of chrysotile-containing sheets on both sides of an amosite-containing sheet. A view of a polished cross-section of the outer portion of sample C4503 clearly shows the Layers A and B and a portion of Layer C (Figure 1). Layers E and D would appear the same way if a portion of the sample were taken from the other side of the board. Scanning electron microscope images of the polished cross-section show that Layer B is characteristic of a laminate material in which striations are built-up on top of MVA0393:RPT1208 ' each other (Figures 2 and 3). At higher magnifications it can be seen that chrysotile fibers are present in the striations in Layer B (Figure 4). Layer C was found to be composed of amosite asbestos in a calcium silicate matrix. The microscopy data shows the material cut was consistent with information available about Micarta/Marinite product material. Micarta-Marinite is an asbestos board construction material composed of two sheet products joined together. Two sheets of Micarta, a high pressure decorative laminate containing chrysotile asbestos, are bound to both sides of a sheet of Marinite, an amosite/calcium silicate board. Together the Micarta and Marinite are used as one product as fire-safe wall partitions in ship construction. ' Releasable Asbestos Fibers A portion of the Micarta/Marinite board was mounted on an SEM stub so that an area of the Micarta cut by the Skii saw could be examined for asbestos fibers. Although the Micarta is made with chrysotile and an organic resin which forms a hard product, sawing the material breaks asbestos bundles which then protrude from the surface of the bound laminate. The chrysotile fibers within the bundles are not encased in resin and are free to be abraded from the surface. The SEM micrographs shown in Appendix B show clearly chrysotile asbestos fibers protruding from the cut edge of Micarta board. MVA0393:RPT1208 Page 2 Figure 1: View through a stereo light microscope ofa polished cross-section of a portion of an asbestos board (C4503). Layer A is an outside layer which contains no asbestos. Layer B contains chrysotile asbestos. Layer C of which only a part is shown here is an amosite-containing layer. Magnification = 23X MVA0393.RPT1208 Page 3 Figure 2: A scanning electron microscope (SEM) view of the same polished crosssection as shown in Figure 1. The layers are labeled in the same way. Magnification = 60X MVA0393:RPT1208 Page 4 , i' i; :! Figure 3: SEM micrograph at higher magnification of an area of Layer B shown in Figure 2. The striations characteristic of laminate material are clearly evident. Magnification = 600X MVA0393:RPT1208 Page 5 I ti ! ! MVA0393:RPT1208 Page 6 i Appendix A Polarized Light Microscope (P^M) Analysis Sheets MVA Sample C4503 MVA0393:RPT1208 Page 7 J MVA, Inc. PLM Constituent Analysis Date: 11/09/92 MVA#: 0393 Sample I.D.#: C4503B Location: not provided Client Sample l.D.#: 2 - -- Examination using the stereomicroscope: C4503 is a multi-layered material composed of A) a tan consolidated material, B) a gray consolidated material, C) a white powdery material, D) a gray consolidated material, and E) a tan consolidated material. CONSTITUENT % CONSTITUENT Fibers: Cotton Fiberglass Filament Wool Mineral Wool Hair Paper/Wood Chem. Proc. Mech. Proc. Synthetic Pigment: ___Binders: , Kaolinite -- Montmorillonite -- Gypsum -- Anhydrite -- Portland Cement Lime (hydrated) ~ 24% Precipitated -- Carbonate -- Starch Other % CONSTITUENT -- -- -- -- -- -- -- -- ~ 50% Fillers: Diatoms Iron Chromite Iron Oxide Limestone Magnetite Mica Perlite Synthetic Foam Pumice Quartz Talc Vermiculite Opaque % - -i--hi --h ---- -- -- --- -- -- -2% Chrysotile Amosite Asbestos Minerals ~ 24% Anthophyllite -- Crocidolite -- Tremolite/ -- Actinolite ___ Comments: No asbestos was detected in the "A" and "E" layers and they were not included in the analysis. Please see sheet labeled C4503C and C4503D for the analyses of the "C" and "D" layers. Analyst: Maureen C. Bottrell MVA0393:RPT1208 Page 8 MVA, Inc. PLM Constituent Analysis Date: 11/09/92 MVA#: 0393 Sample I.D.#: C4503C Location: not provided Client Sample I.D.#: 2 Examination using the stereomicroscope: C4503 is a multi-layered material composed of A) a tan consolidated material, B) a gray consolidated material, C) a white powdery material, D) a gray consolidated material, and E) a tan consolidated material. 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 * ; % -44% Fillers: Diatoms Iron Chromite Iron Oxide Limestone Magnetite Mica Perlite Synthetic Foam Pumice Quartz Talc Vermiculite -- -- ~ 20% -- -- -- -- -- -1% -- -- Chrysotile Amosite Asbestos Minerals -- Anthophyllite ~ 35% Crocidolite -- Tremolite/ -- Actinolite Comments: No asbestos was detected in the "A" and "E" layers and they were not included in the analysis. Please see sheet labeled C4503D and C4503B for the analyses of the "D" and "B" layers. `Binder is consistent with calcium silicate binders. Analyst: Maureen C. Bottrell MVA0393:RPT1208 Page 9 MVA, Inc. PLM Constituent Analysis Date: 11/09/92 MVA#: 0393 Sample I.D.#: C4503D Location: not provided Client Sample I.D.#: 2 Examination using the stereomicroscope: C4503 is a multi-layered material composed of A) a tan consolidated material, B) a gray consolidated material, C) a white powdery material, D) a gray consolidated material, and E) a tan consolidated material. CONSTITUENT % CONSTITUENT % CONSTITUENT Fibers: Cotton Fiberglass Filament Wool Mineral Wool Hair Paper/Wood Chem. Proc. Mech. Proc. Synthetic Pigment: Binders: Kaolinite -- Montmorillonite --. Gypsum -- Anhydrite -- Portland Cement Lime (hydrated) -24% Precipitated -- Carbonate -- Starch Other -- -- -- -- -- -- -- -- - 50% Fillers: Diatoms Iron Chromite Iron Oxide Limestone Magnetite Mica Perlite Synthetic Foam Pumice Quartz Talc Vermiculite Opaque Chrysotile Amosite Asbestos Minerals -24% Anthophyllite -- Crocidolite -- Tremolite/ -- Actinolite Comments: No asbestos was detected in the "A" and "E" layers and they were not included in the analysis. Please see sheet labeled C4503C and C4503B for the analyses of the "C" and "B" layers. Analyst: Maureen C. Bottrell MVA0393:RPT1208 Page 10 Appendix B Scanning Electron Microscopy Micrographs as Received Cut Edge of Micarta MVA Sample C4503 I !I if i i fr i :! ` i : Ml li MVA0393:RPT1208 Page 11 Figure B1. MVA0393-C4503: Secondary electron (SE) image of a cross-section of board laminate. The exposed surface had been previously cut with a Ski! saw. Magnification = 29X 1 MVA0393.RPT1208 Page 12 Figure B2. MVA0393-C4503: Higher magnification SE image of the board laminate cross-section. Magnification = 70X MVA0393:RPT1208 Page 13 i ! i t Figure B3. MVA0393-C4503: Higher magnification SE image of an area in Figure B2 showing chrysotile asbestos fiber bundles and chrysotile fibers protruding from the surface of the board laminate. Magnification = 145X 1f J i MVA0393:RPT 1208 Page 14 Figure B4. MVA0393-C4503: Higher magnification SE image of a protruding chrysotile asbestos fiber bundle in Figure B3. Magnification = 51 OX MVA0393:RPT1208 Page 15 Figure B5. MVA0393-C4503: Higher magnification SE image of the protruding chrysotile fiber bundle in Figure B4. Magnification = 1900X MVA0393:RPT1208 Page 16 l j i \