Document Qk54NpJdX2kBbKdYJ8kGE52Zk

CAMBRIDGE / TO-. Jack Phillips - Dearborn WOM-. T.E. Hamilton CC; J.W. Wolter W.R. Wright R.E. Schneider R.H. Locke R.W. Anderson 03632542 DATf: . August 9, 1976 su8ject; Air Sampling Results Attached are the results of the air sampling for tremolite fibers that I took on July 14 and 15, 1976. All of the samples are personnel samples and I have used them to calculate Time Weighted Averages for your employees. OSHA standards require that tremolite fiber concentrations must not exceed 2 fibers'/cc TWA or 10 flbers/cc as a ceiling limit for any 15 minute period. Below are listed the calculated TWA's for the samples. 7-14-76 - 1st shift John Kimble, Mod. A #1 bagger, Mas. Fill, #4 Libby .......... 5.79 fibers/cc Joe Bailey, Mod. A #2 bagger, Pool Base, S.C. #3 .............. 3.99 fibers/cc . 7-14-76 - 2nd shift Ervin Bennett, Mod. A #1 bagger, Libby 4 .............................. 5.50 fibers/cc H. Byrd, MK Mixer/bagger, MK-5, Libby 3 ................................ 5.04 fibers/cc Cleo Arnold, Mod. A #2 bagger. Plaster Agg., Libby 3 ----- 5.96 fibers/cc 7-15-76 - 1st shift Bob Hartman, MK mixer, Libby 3 .................................................. 6.35 fibers/cc Also note that In sample DER-12, Solomon Turner was exposed to 20.12 fibers/cc while loading Libby ore into the storage bins. We are required to notify these employees in writing that they have been exposed above the allowable limits. A standard form letter is used for this purpose. They have been prepared for you to sign and deliver as soon as possible. Be sure to keep a copy bf it in your OSHA file for future reference. 1 TEH:bp Attachment Thomas E. Hamilton 15104529