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A one-page Johns-Manville internal memo of January 14, 1974, a memo from D. R. Christensen to P. L. Earle, both of J-M's Research and Development Center in Manville, New Jersey, with copies to D. E. Hillier and G. L. Swallow at headquarters. Prepared by T. F. Antonson; the samples were taken January 11.
- Author
- D. R. Christensen
- Published by
- Johns-Manville
- Date
- January 14, 1974
- Number
- Bates S420-430
- Library no.
- ACL Doc 25550 · asbestosclaims.law/library/25550
- Rights
- From the Johns-Manville archive (file S420, industrial hygiene surveys and dust counts), produced in litigation (stamped "PRODUCED JM-83"). An internal company test report, republished for research and health-and-safety purposes.
Read or download
Read online Download the PDF Memo, January 14, 1974 · 1 pages · 143 KB
What it shows
The R&D Center cut ¾-inch Marinite 36A with a 10¼-inch Rockwell Model 510 portable circular saw, with the saw hood and a modified vacuum table exhausted to a Spencer portable baghouse. The operator's sample was 0.5 fibers/cc and the area sample 0.9, against the 2.0 limit. The memo adds: "Although sample results are relatively low, visible airbone [sic] dust was observed in the cutting plane of operations."
It is one of a series of 1973–74 sawing tests at the R&D Center that tried to bring Marinite cutting under the new 2.0 fibers/cc limit; see Marinite for the series.
Related
- Marinite and the SS Morro Castle disaster, our guide to the product
Cited on this site
Cite this document
D. R. Christensen. “J-M R&D Center, Sawing of Marinite 36A with a Rockwell Model 510 Saw.” January 14, 1974. Bates S420-430. Johns-Manville. AsbestosClaims.Law Library, ACL Doc 25550. https://asbestosclaims.law/library/25550.
ACL Doc numbers and their short links never change. See how to cite the Library.
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