Document BRxKqV3ReNdeb77D9MB1aOJqL

ETHYL CORPORATION ENCLOSURE 4 INTER-OFFICF To Mj/. W y/c. ^t^d^r *'-***; From W." E. . Rinehart, Sc.D. Subj EOT Asbestos Exposure Levels Address Baton Rouge Address New Orleans Date October 23, 1969 On August 20, 1969, air samples were 'taken relative to the useof asbestos-containing materials at the Baton Rouge plant. The samples were sent for evaluation to Mr. L. Schaefer, who is considered an expert in identification and counting of asbestos particles, at the Kettering Laboratories in_Cincinnat.i--^Ohia.^Sample--sitesT^eond-lt-ion-s--and^P?;irlt-q------------were as follows:- Site and Condition No. of asbestos fiber (mppcf***) In shop of second floor alloy area at breathing zone during hand sawing of asbestos board 0.3 Near vibrating conveyor of second floor alloy area at breathing zone during hand sawing, slicing and fitting of pipe insula tion 0.1 In shop of hydrocarbon area at breathing zone during band sawing of asbestos board (doors closed) 1.2 Outside shop of _hydrocarbon__area_at__br_e.athing____A..2______ zone during ripping of asbestos board with rotary saw *mppcf = million particles per cubic foot eTH 000095 The value which is presently recommended by the American Conference of Governmental Industrial Hygienists (ACGIH) as a Threshold Limit Value for asbestos is 2 mppcf. This assumes repeated 8 hour workdays under rela tively constant exposure conditions. It is true that certain of the opera tions (power saws) produce a great deal of dust; which very well may exceed "nuisance" levels. The important thing-, however, is that our sampling technique (which is more severe than the human respiratory. .system)vSdd not reveal amounts of .asbestos dust" (fibers) - -at the "breathing ;zone which we' would consider hazardous under -the^operating conditions we' sampled. Were these conditions:.to;-.change substantially, .the conclusions might be different fit Sheet #2 (continued) Memo to: Mr. W. C. Strader - Baton Rouge Re: Asbestos Exposure Levels October 23, 1969 'f%t Jt .*X The results obtained for the power sawing operations were of the same order of magnitude as is the TLV and there is no question about the "nuisance level" of the total dustiness. Therefore, we strongly recommend . continuance of wearing "Dust-Foe" type respirators as we observed. Since excessive levels of asbestos during power saw operations were not found, I do not feel there is much likelihood of finding excessive levels in other locations (applying or removing insulation)' and I do not ~f e^^tntKis^'tlme "*tha~"fur^eF;^^i^Tjig^iT^eifa .. ............ WER/af cc: Dr. R.C.A. Bock ' Mr^--Wallece--Armstrong W. E. Rinehart, Sc.D. Environmental Toxicologist 000996 ETH ' * pte) <>^'^1 f t*1 J&*ra ^fhJ& A*-*"*** ! (0f i / f ENCLOSURE Subject No. 1 "*( &l<Zllf3` - ^yist 61 year old W M; insulator x 25 years; diagnosis of inactive pulmonary tuberculosis in 1956; surgery several times-for inguinal hernias, anorectal fistula; no respiratory symptoms or unusual absence for respiratory disorders. Ppc/?- No. 2. 61 year old W M; insulator x 24 years; hospitalized and treated , \\4b 11!^or act:*-ve pulmonary tuberculosis in 1958, not on medication Di/r7**"* o/7/^? currently; no recent respiratory symptoms or absence for #S1 7i respiratory disorder. No. 3. 56 year old W M; insulator x 24 years; pneumonia 1953; other 10y^? diagnoses - chorioretinitis, lumbago, renal stone, RBBB per EKG; rn\or\ mrepcoennf*t rraeesnpiirraattAonryr sc\yrmmrp\ft'or\mmsc ro\rr aabKsceonncrea ffor\rr rrceiscpniirraattonrny; disorder. Q 3 & -6 No. 4. ^5 3/i-'f ' 44 year old W M; insulator x 19 years; no significant illness 'P,>aLsvor symptoms referable to respiratory system. No. 5. 47 year old W M; insulator x 25 years; no respiratory symptoms -> i'frl thl/lP* s^sence; other diagnoses - gastric ulcer, spasm of esophagus, "3 ' 3 plantar warts. No. 6. -y}o!'?-0 64 year old W M; insulator x 26 years; pneumonia 1962; no . subsequent respiratory symptoms; other diagnoses - minus 10 axis deviation per EKG, atrial flutter and fibrillation 1968, excision "growth" on vocal cords several years ago. ( 3-/-7(3) c * 7*1 No. 7. \\Inltf 44 year old W M; insulator x 18 years; clinical diagnosis "pneumonitis" per private M.D. 1955 (no X-ray taken); no subsequent respiratory symptoms or absence; other diagnoses "malaria" in 1957 per private M.D., "nervous condition" in 1958 per Ochsner's Clinic. No. 8. - 44 1/2 year old W M; insulator x 24 years; no respiratory symptoms, gyi or absence; other diagnoses - renal stojnes, polyarthritis of 5, unspecified etiology. ^ No. 9. tf 44 year old W M; insulator x 22 years; no respiratory symptoms ^9$* or absence; no significant diagnoses. No. 10. 63 year old W M; insulator x 32 yearss; no respiratory symptoms - cJir 7 , ./or absence; no significant diagnoses * ( v// - No. 11 46 year old W M; insulator x 20 years; no respiratory symptoms ,,[// fTg'j i or absence:; other diaganosis - labyrinthitis . 3 - //`/A* IT* ***_. <7- No. 12. 49 year old W M; insulator x 23 years; no respiratory symptomns ., or absence; no significant diagnoses . 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