Document 3jYYOgKL0wxQN7YZYbBor056

FROMe. B. Parker Roc' e Works MAR 1 7970 TO Dr. B. D. Dinman Pittsburgh Office 1978 February 27 RE: INDUSTRIAL HYGIENE TEST RESULTS Attached is a copy of correspondence and data received from Carl Halgren, OSHA Industrial Hygienist. Except for resampling in the Press Room, this completes Mr. Halgren's current work at Rockdale. The Press Room CTPV tests, as you will recall, were confused with oil mist and Mr. Halgren wants to return to Rockdale to repeat that portion of his work. EBP/bk Copies: ""T. B. Bonney, Pittsburgh W. J. Drake, Rockdale J. W. Havins, Rockdale W. D. Essary, Rockdale H. W. Brooks, Rockdale E. R. Goltra, M.D., Rockdale A. G. Clayton, Rockdale UJ ALCOA PLAINTIFF'S EXHIBIT AL-56 ARD 003465 F-499 (RCV 1l.e) U.S. DEPARTMENT OF LABOR OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION Suite 310, American Bank Tower 221 West Sixth Street Austin, Texas 78701 February 6, 1978 (512) 397-5783 Mr. E. Brooks Parker Environmental Superintendent Aluminum Company of America P.0. Box 472 Rockdale, Texas 76567 Ref: H7471-044 Dear Mr. Parker: As requested by J. J. Congleton, enclosed are copies of all sampling results obtained by OSHA during the referenced inspection. Also enclosed are the analytical techniques of the various sampled compounds. -3 If you have any questions or require further information, please do not hesitate to call. Sincerely, ^HJeRBEFTtJl KURTZ Area Director HMK:CAH:dt Enclosures - Sample Results :<a, ARD 003466 ANALYTICAL TECHNIQUES 1. Asbestos: Filters were examined by phase contrast microscopy. Method No.: P&CAM 239 2. Coal Tar Pitch Volatiles: Method No.: P&CAM 217 for Benzene Soluble compounds 3. Fluoride: Sample was fused with NaOH, neutralized, and analyzed by the standard Orion fluoride electrode. Method No.: P&CAM 117 4. Hydrogen Fluoride: Sample was desorbed with dionized water, neutralized, and analyzed by the standard Orion fluoride electrode. Method No.: P&CAM 117 5. Noise: Audio dosimetry 6. 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