Document 3e7GrRGxDK6BndRzg5bXkLjwD

DOW CHEMICAL U.S.A. LOUISIANA DIVISION PLAQUEMINE* LOUISIANA 707S4 604 #87-4321 INDUSTRIAL HYGIENE REPORT STYRENE SURVEY CELL SERVICE (Old CA I Area) FILE NO. 110-20-6 DATE June 25, 1975 AUTHOR Dannie Kennedy CHECKED^ DATE __ June 25.__1975_________ SUMMARY Conducted styrene survey for Cell Service (old CAI Area). Results were favorable. Highest styrene level recorded was 15 ppm (TLV Is 100 ppm). General conditions of the l area have been much improved through housekeeping and physical improvements. DISTRIBUTION LOUISIANA DIVISION G. W. Daigre E. Edwards S. Richardson R. Peebles W. Vosburg Medical Department File (2) Bldg# f ti n it tt 2501 3701 2601 3701 2601 2303 MIDLAND H. Hoyle Bldg. 1803 R. Langner " 1803 TEXAS R. Daniel Bldg. B-101 an operating unit of the dow chemical company 00 01 1 61 8 CONFTDFNTTA! 2- - STYRENE SURVEY CELL SERVICE (Old CA I Area) INTRODUCTION Conducted a styrene survey at Cell Service (in the old CA I area which "is now used for cell construction and repair work). METHODOLOGY J The Sipin Personal Sampler pump, model SP-l, with charcoal tubes, was employed to collect the time weighted average results. Six strategically located stationary samples and six personnel samples were collected in this mapner. Six samples were also collected using the Model 31 Drager Pump which yields an immediate result for that particular point in time (see attached Results sheet) The building and personnel were monitored while Derakane 411-C50 was being mixed and poured for normal cell construction and repair operations. All samples were taken at breathing zone level. RESULTS The highes styrene level recorded with the Sipin pump was 2.68 ppm by volume (time weighted average) which is well below the OSHA standard or TLV of 100 ppro. This sample was caught near the vent from the mixing room (described below). The highest level recorded with the Drager pump was 15 ppm while operators were pouring Derakane on cells. The remaining five samples indicated alevel below 10 ppm, and well below the established threshold limit value. OBSERVATIONS J Several substantial improvements have been made in the cell service operations. A portable mixing building has been installed with a specially designed vent system to segregate the mixing area from the general work area of the building. (Large amounts of Asbestos and Derakane are mixed within the mixing building where respiratory equipment is required). ; -~ Another room has been constructed to store Asbestos which is kept locked and can be opened by supervision only. The sandblasting operation outside the building has been moved further away from the cell repair work area to lessen noise and dust problems. Housekeeping has been stressed with a concerted effort made to clean up the entire cell service area. 00 CONFTOFNTTAl. -3- CONCLUSIONS Much progress has been made in the cell service area and styrene vapors are below the established TLV, however, the vent system of the mixing room _i could be improved by extending it outside of the building. This would not involve a great cost and would eliminate some styrene vapor exposure, especially in the winter months when ventillation is reduced. ** Supervision is responsible for, and must stress potential health hazards;, and survey results with operators and laborers in the area. It is essential that personnel understand the seriousness of the health hazards and the proper protective measures that are to be taken. A survey of the cell repair area must be made within 12 months of the previous survey, or whenever normal operation procedures are changed and the possibility of an exposure increase exist. DO 011600 CONFTDFNTTAl -4- Sample Time 1 6hrs 35min 2 6hrs 35min 3 5hrs 45min 4 5hrs 45min 5 5hrs 45min 6 6hrs 30min 7 5hrs 47min 8 5hrs 40min 9 5hrs 38min 10 5hrs 47 min 11 5hrs 47min 12 5hrs 46min STYRENE MONITORING (SIPIN PERSONAL SAMPLER POMP) Date Volume Sampled (TWA) ppm(v) Location & Activity 4-17-75 23.31 liters 2.68 Outside mixing?room near exhaust vent 4-17-75 19.59 liters 2.33 Mixing Derakane* inside mixing room ^ 4-16-75 18.48 liters 0.26 Middle of building 4-16-75 19.82 liters 1.52 Inside mixing room mixing Deralcane 4-16-75 4-17-75 17.29 liters 20.32 liters 2.09 0.47 Vent from mixing room Center of work^area 4-18-75 17.83 liters 0.135 Mixing and pouring Derakane on cells 4-18-75 21.78 liters 0.66 Pouring Derakane on cells 4-18-75 20.96 liters 4-21-75 14.99 liters 4-21-75 17.48 liters 0.75 1.60 1.86 Mixing and `pouring Derakane on cel-ls - *^ Mixing and pouring Derakane on cells 1: Mixing and pouring Derakane on cells 4-21-75 18.93 liters 2.29 Inside mixing room i -V ) Personnel and stationary samples were caught for styrene exposure {while workers were mixing and using Derakane 411-C50 with Asbestos, Nytal 300 talc, hnd activators. The Derakane slurry is poured on the cells (gluing the anodes to the frames). ^ TLV is 100 ppm for styrene CnOoNFoTlOeNTTAl, Sample 1 2 3 4 3 6. -5- DRAGER ANALYSIS FOR STYRENE Results 15 ppm <10 ppm <10 ppm <L0 ppm <10 ppm <10 ppm Activity Pouring Derakane to glue anode assembly to frame , ' - _ Mixing Derakane, Asbestos and Nytal 300 in mixing room Pouring Derakane to glue anode assembly to frame Measured vapors coming from mixing room while Derakane was being mixed with Asbestos, Nytal 300, and activators Measured styrene vapors middle section of building Measured styrene vapors in southwest corner of building (corner nearest to area where anodes are being glued to frames) DO 011622 CONFIDENT T A l.