Document wgLKL70Gjnkvx6kvEV13M9dxV

DOW CHEMICAL U.S.A. June 21, 1983 LOUISIANA DIVISION P O BOX ISO plaque mine, Louisiana 707ba-oiso 604 SBS'SOOO Tony Ekker - Marine Department A1 Kirby - Marine Department Charlie Halphen - Industrial Hygiene Dannie Kennedy - Industrial Hygiene A review of barge personnel monitoring data for this year (excluding benzene which was covered in an earlier report) has prompted the following recommendations: 1. With the exception of spills or leaks, 1983 data so far is acceptable. 2. MSA Comfo II respirator should be worn in any spills or leaks or when conditions are condusive to potential exposure (hot, humid summer days with no wind, etc.) 3. Respirator should be worn when odor is evident. 4. Respirator cartridges should be available at docks and changed every three months of after heavy exposure. A comparison of odor thresholds and TLV's is shown below: Odor Threshold (PPM) TLV (PPM) Chloroform - 200-300 Carbon Tet. - 70 Benzene - 5-20 EDC 40-100 Methylene Chloride - 300 Perchloroethylene - 100 Toluene 1-5 10 5 10 10 100 100 100 J. L. Moreau, Jr. Industrial Hygiene Railroad/Marine Irj DO 082266 CONFIDENTIAL AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY 8 HOUR TWA - PERSONNEL SAMPLES - BARGES METHYLENE CHLORIDE TLV-lOO 36.11 34.78 45.16 0.12 CHLOROFORM TLV-10 0.58 1.01 6.01 5.62 5.29 4.41 12.12 11.66 33.95 18.16 PERCHLOROETHYLENE TLV-50________ 0.32 0.17 1.24 0.57 ETHYLENE DICHLORIDE TLV-10 0.39 8.22 10.20 8.05 0.06 2.80 0.13 0.06 12.20 0.21 0.91 4.99 0.08 5.27 CARBON TETRACHLORIDE TLV-5 1.55 0.07 0.17 0.78 0.39 0.44 0.39 0.43 DO 082267 CONFIDENTIAL