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A one-page Johns-Manville internal memo of May 28, 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 May 23 and 24.
- Author
- D. R. Christensen
- Published by
- Johns-Manville
- Date
- May 28, 1974
- Number
- Bates S420-436
- Library no.
- ACL Doc 25545 · asbestosclaims.law/library/25545
- 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, May 28, 1974 · 1 pages · 136 KB
What it shows
The R&D Center cut 1-inch Marinite 23 with a Rockwell Model 648 portable jigsaw. With a Spencer portable baghouse running two hoses, one to the saw and one to a vacuum table, the operator's samples were 0.8 and 0.5 fibers/cc. With the baghouse ventilating the saw only, the operator's sample was 4.9 and the area sample 2.3, against the 2.0 limit.
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 23 with a Rockwell Jigsaw.” May 28, 1974. Bates S420-436. Johns-Manville. AsbestosClaims.Law Library, ACL Doc 25545. https://asbestosclaims.law/library/25545.
ACL Doc numbers and their short links never change. See how to cite the Library.
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