I* Ramsey- ^antz, Inc. .

Radiographic and Physiologic Patterns Among Workers Engaged in Manufacture of Asbestos Cement Products A Preliminary Report Hans Weill, M.D.; Carmel Waggenspack, M.S.; William Bailey, M.D.; Mor ton Ziskind, M.D.; and Charles Rossiter, M.A.

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Tim CO-121 T'NITED STATES C --ORIENT hr<11-43) ^ AOi Memorandum, TO Thomas Cursis FROM w.S.

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640 EXPERIMENTAL ASBESTOS18--GROSS A DE TREV1LLE chiole was found in the lungs of guinea pigs disappearance of chryaotite dust from the that had been exposed for three months to lesion, either by dissolution at by transport, an atmosphere containing 20 mg/cu m of is not a sine qua non of healing; but that chrysolite dust.

ASBESTOS EXPOSURE-SELIKOFF ET AL 107 293 men had first been ex posed between the be Table 1.

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1 appear that most of the plant contamination is Page 1570 2 resulting from this source. 3 Therefore, before a precise determination 4 can be made regarding dust levels generated by 5 specific deflashing and mixing operations, improved 6 engineering control must be installed in the 7 collectors. 8 As in our previous study in 1967, we 9 recommend that the air from the collectors be 10 discharged directly to the outside of the building. 11 Referring to the Michigan Department of 12 Public Health, Division of Occupational Health 13 administrative code for occupational air contaminants 14 and physical agents establishes specific rules with 15 regard to the recirculation of the contaminated air 16 from dust collectors. 17 The code has this requirement in paragraphs 18 2 and 3.

1 brush it out because the dust is bad.

1 mesothelioma occurring in the Northwestern Cape Page 1730 2 Province of South Africa. 3 Interestingly, only about half of those were 4 people who actually did the milling and mining of 5 asbestos.

Page 2263 1 THE COURT: Let the record reflect that Mr. 2 McGowan is her assistant, and Mr.

Report on '...INDUSTRIAL HYGIENE SURVEY OF SELECTED PLANT OPERATIONS ` PPG INDUSTRIES Pittsburgh-Corning Corporation Port Allegany, Pennsylvania :August .27-28,.1968 By Morton Corn, Ph.D.

ft* l*e*rd nmOMHEMTAL C0ST101 MSZTUC FEBRUARY 27. 1969 - mLCT Jan U iMiMt 1LB.

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