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Antimony and/or antimony compounds 15 500 <br /> Arsenic and/or arsenic compounds 5.0 500 <br /> Asbestos 1.0 <br /> (as percent) <br /> Barium and/or barium compounds (excluding <br /> barite) 100 10,000 C <br /> Beryllium and/or beryllium compounds 0.75 75 <br /> Cadmium and/or cadmium compounds 1.0 100 <br /> Chromium (VI) compounds 5 500 <br /> Chromium and/or chromium (III) compounds 5d 2,500 <br /> Cobalt and/or cobalt compounds 80 8,000 <br /> Copper and/or copper compounds 25 2,500 <br /> Fluoride salts 180 18,000 <br /> Lead and/or lead compounds 5.0 1,000 <br /> Mercury and/or mercury compounds 0.2 20 <br /> Molybdenum and/or molybdenum compounds 350 3,500e <br /> Nickel and/or nickel compounds 20 2,000 <br /> Selenium and/or selenium compounds 1.0 100 <br /> Silver and/or silver compounds 5 500 <br /> Thallium and/or thallium compounds 7.0 700 <br /> Vanadium and/or vanadium compounds 24 2,400 <br /> Zinc and/or zinc compounds 250 5,000 <br /> a STLC and TTLC values are calculated on the concentrations of the elements, not the compounds. <br /> b In the case of asbestos and elemental metals, the specified concentration limits apply only if the substances are in a friable, <br /> powdered or finely divided state. Asbestos includes chrysotile, amosite, crocidolite, tremolite, anthophyllite, and actinolite.ln the case <br /> of asbestos and elemental metals, the specified concentration limits apply only if the substances are in a friable, powdered or finely <br /> divided state. Asbestos includes chrysotile, amosite, crocidolite, tremolite, anthophyllite, and actinolite.ln the case of asbestos and <br /> elemental metals, the specified concentration limits apply only if the substances are in a friable, powdered or finely divided state. <br /> Asbestos includes chrysotile, amosite, crocidolite, tremolite, anthophyllite, and actinolite. <br />