Document EqVeLZKbjLYzxNLodVX3NMNXL

J. /? - o?^-/ <sro // sa'istoois February 8, 1973 R. Webb Organic Chemicals Freeport TEXAS DIVISION Your three samples were analyzed for asbestos fibers by the Midland Division Microscopy Laboratory using the standard phase contrast microscopy method at 4S0X magnification. The results indicate very low concentrations of asbestos fibers in the areas where the samples were taken. Sample Air Volume Sampled (ml) Estimated Fibers/Sample 1 100,000 2 225.000 3 300.000 1235 3705 4940 TLV* Let me know if you have any questions Best regards. Asbestos Cone (flbers/ml) 0.012 0.016 0.016 5.0 G. H. Flores Chemical Biology Research 1701 Building 517 636-2880 sjl *TLV (Threshold Limit Value) is the time-weigJ concentration to which most people can be exp without adverse effect.