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Metal CAS # PEL Health Effects Target Organs <br /> Arsenic, inorganic 7440382 0.01 mg/m3 Ca,4, 17,20 G, H, I, K <br /> Asbestos 1332214 0.2 fibers/cc Ca, 17 H <br /> Chromium VI 7440473 0.05 mg/m3 Ca, 17 J <br /> Copper 7440508 1.0 mg/m3 4,8,16,21 G,I,J,K <br /> Cyanide 151508 5.0 mg/m3 4,8,11,15,17,23 D,E,J,K <br /> Lead 7439921 0.05 mg/m3 1 B,D,I <br /> Mercury 7439976 0.05 mg/m3 4,8,9,11 D,E,I,J,F <br /> Phosphorous 7723140 0.1 mg/m3 1,8,17 B,E,G,I,J,K <br /> Polynuclear Aromatics 8007452 0.2 mg/m3 Ca,4 A,I,J,K <br /> (coal tar pitch volatiles) <br /> Silica (crystalline) 14808607 0.05 mg/m3 17 J <br /> CAS# = Chemical Abstract Services Number <br /> PEL = OSHA Permissible Exposure Limit <br />