(Cr) Toxicity | ATSDR - CSEM - Agency for Toxic Substances and ...
(Cr) Toxicity | ATSDR - CSEM - Agency for Toxic Substances and ...
(Cr) Toxicity | ATSDR - CSEM - Agency for Toxic Substances and ...
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<strong>Agency</strong> <strong>for</strong> <strong>Toxic</strong> <strong>Substances</strong> <strong>and</strong> Disease Registry Chromium <strong><strong>Toxic</strong>ity</strong><br />
Case Studies in Environmental Medicine (<strong>CSEM</strong>)<br />
Answers<br />
2. The correct answer is D. <strong>Cr</strong>(III) <strong>and</strong> <strong>Cr</strong>(VI) are released to the<br />
environment primarily from stationary point sources (facilities that are<br />
identified individually by name <strong>and</strong> location) resulting from human<br />
activities. The estimates of atmospheric chromium emission in 1976<br />
<strong>and</strong> 1980 in the Los Angeles, CA <strong>and</strong> Houston, TX areas indicate that<br />
emissions from stationary fuel combustion are about 46-47% of the<br />
total environmental releases. According to the <strong>Toxic</strong>s Release<br />
Inventory, in 1997, the estimated releases of chromium of 30,862,235<br />
pounds to soil from 3,391 large processing facilities accounted <strong>for</strong><br />
about 94.1% of total environmental releases. Leaching from topsoil<br />
<strong>and</strong> rocks is the most important natural source of chromium entry into<br />
bodies of water.<br />
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