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No additional chemicals were identified from the Lyons Plant source emission tests that are <br />likely to be risk drivers, either on the basis of emission rate or toxicity. Since potential human <br />health risks, including cancer, chronic and acute risks, have been shown to be negligible at <br />several cement kilns with similar or higher emission rates than observed in the Lyons Plant <br />source emission tests, the same general conclusion can be drawn for the use of both FF and <br />TDF at the Lyons Plant. <br />The Lyons Plant emissions tests show that the TDF emission rates for the typical risk driver <br />chemicals are in some cases higher (formaldehyde, chromium, and benzene), lower <br />(dioxins/furans), or approximately the same (carcinogenic PAHs, and PCBs), compared to FF. <br />However, the differences between TDF and FF are not significant from a human health <br />perspective due to low emission rates and equivalent chemical risk profiles. Overall, the Lyons <br />Plant emissions tests indicate no potential for adverse public health impacts from the use of <br />TDF compared to FF. <br />3 <br />