Document 853xJm4Mg3JdrQ7Jzwaq2DO3B

PARTICLE DATA LABORATORIES, LTD 11S Hahn Street October S, 1982 Abex Corporation Medical Department 4550 West 26th Street Chicago, Illinois 60623 Attn: Mr. R. S. Suga PDL Project: 1-6960 Dear Mr. Suga: The ten samples you submitted for asbestos evaluation on September 28, 1982, have been examined by optical techniques. Two species of asbestos - amosite and chrysotile - were found. Identification and quantitation were initiated by a gross examination of the samples as received. Any obvious fractions were noted and samples of each fraction were mounted for polarized light microscopy m a 1.515 index liquid. The fibers were thoroughly separated for examination. Preliminary evaluation was performed by morphology, refractive index relative to the mounting medium and birefringence to determine the possible asbestos present, as well as the abundance and type of other fibers, fillers and binders. The identification of non-asbestos material was not rigorous as these were not the specific item of interest. When asbestos type fibers were seen morphologically, they were additionally characterized by immersion matching in refractive index liquids using both_ white light and the sodium d-line. A numeric determination of birefringence was available based on the index measurements. A sample had to fit into the accepted ranges of indices, birefringence and morphological features to be classed as asbestos. (For Amosite, straight thin single fibers and bundles of such fibers, usually with cleanly broken ends on individual fibers, refractive indices of-1.700 and Vi .695, birefringence .005 and parallel extinction. Chrysotile has thin fibers and fiber bundles with both straight and wavy sections. The ends of bundles tend to be frayed. Indices are `529 - 1.559 and 1.537 - 1.567 and birefringence of .004 to .016. Anthophylite was ruled out by its indices of 1.60 - 1.64, while crocidolite was ruled out by its blue color.) Quantities were based on areal coverage and thickness of the various species present. This is about as accurate as can be achieved by optical SCF-ABEX-2630 DATA LABORATORIES, LTD Abox Corporation POL Project: 1-6960 October 5, 1982 microscopy, especially with a heterogeneous material. Also, the quantitation was based on noting the fraction of asbestos tn each portion of the heterogeneous material and what fraction that portion was of the total sample. Representative micro.w.iphs, both in unpolarized light and with crossed polars and order red compensation, were taken as documentation of uh.it was seen. The results of the evaluation were as follows: u;G-5 Amosite 0.1 - 0.2% (indices 1 .700 and 1.696) Mostly an esparto or burlap type organic fiber (woven) with some binder. KG-6 Fiberglass 20 - 25% Balance is binder and quartz, calcite, etc. w;G-7 Fiberglass 30 - 35% Balance is binder siny.lar to EG-6. EG-8 Chrysotile 1-2% - Balance is fiberglass (70 - 80%) and binder (organic ?) 10 - 15%. EG-9 Chrysotile 8-10% Organic fibers 50 - 60%, Binder 20 - 30%. EG-10 Chrysotile 2-3% Organic fibers 80 - 90%, Binder 10 - 15%. EG-H Chrysotile 40 - 50% Organic fibers 30 - 40%, Binder 10%. EG-12 Chrysotile 30 - 35% Balance is binder with pumice filler. EG-13 Chrysotile about 0.5% Organic fibers 60 - 70%, Binder 30 - 40%. EG-14 Chrysotile 0.1 - 0.2% Organic fibers 10 - 20%, Binder 80%. Thank you for consulting Particle Data Laboratories m this matter. Respectfully submitted. MB:cnl Enclosures laboratories, ltd. EG-5 M DATA LABORATORIES, LTD t EG-6 SPfMlMl CLl DATA LABORATORIES, LTD I I i EG-7 iiMh'fce a DATA LABORATORIES, LTD. * EG-8 t EG--9 sHtfi&u EG-10 8PM IMS LE DATA LABORATORIES, LTD EG-11 iCLl DATA LABORATORIES, LTD EG-12 EG-13 rgeii'iStt iClE DATA LABORATORIES, LTD EG-14 sfwrn PARTICLE DATA LABORATORIES, LTD, 7 75 Hahn St Elmhurst, Illinois 60126 13121 832 S6SS SOLO TO Abex Corporation Medical Department 4550 West 26th Street Chicago, Illinois 60623 SHIPPED TO Same INVOICE No. 9405 DATE 10-12-82 order Verbal