Document VkjLmEoLrBKVDy4eq4zema28

*\ DOW CHEMICAL U.S.A. June 10, 1977 LOUISIANA CMVISION ALAQUtMINf. LOUISIANA 707&-4 04 B-OO0 TO ALL Lite #2 EMPLOYEES For your information; As most of you know, we have been taking air samples on each classification for eight hour periods. These samples were run in the lab for Benzene, Toluene, Xylene, Styrene, and Butadiene 1*3. The results of the samples are: Number of s. s. 0. s. S. 0. T. Process 0. T. Furnace 0. T. Janitor Secretary Instru. Msn By Waste Water Pit By 2E-455 Inside 2C-55 3 3 2 4 2 3 i 2 2 1 2 Parts Per Million Benzene Toluene Xylene Styrene Butadiene 1-3 High Avg. High Avg. High Avg High. Avg. High Avg. .16 .05 .05 .01 0 0 0 0/ 0 0 .22 .07 .03 .01 0 0 0 0 ' 0 0 .04 .04 .16 .09 .07 .02 .05 .01 00 .93 .34 .08 .04 0 0 0 0 00 .04 .03 .02 .01 6 0 0. 0 00 .02 .01 .02 .01 0 0 0 `0 00 0 0 0 0 00 00 00 .42 .25 .04 .02 0 0 0 0 00 .16 .15 ,07 .06 0 0 .03 .03 0 0 0 0 .16 .14 .01 .005 0 0 00 00 00 00 00 00 OSHA has just imposed a new standard on Benzene. It is l ppm. The old atanderd was 10 ppm. TWA (time weighted average) - the average amount of material which can be tolerated for an eight-hour work shift 40 hours per week for the lifetime of the employee without causing any adverse health effect. For example, you could work in air with 200 ppm Toluene for 4 hours and in an area with zero Toluene for 4 hours and your TWA would be 100 ppm TWA. TLV (threshold limit value) refers to airborne concentrations of substances and represent conditions under which it is believed nearly sll workers msy be repestedly exposed day after day without adverse affect. The TLV for our camples are: Benzene Toluene Xylene Styrene Butadiene 1-3 1 ppa 100 ppm 100 ppm LOO ppm 1000 ppm re AN OetRATMO UNIT Of TMC DOW CHEMICAL C0MAANV DO 143148 CONFIDENTIAL