Your firm has been asked to evaluate the "risk" of removing drums of acid from a...

Your firm has been asked to evaluate the "risk" of removing drums of acid from a waste lagoon that contains cyanide. The following data have been provided to you: Volume of air in which occupants live = 1 X 108 m3 Wind speed = calm Number of drums = 10 Volume of each drum = 0.02m3 Contents of drums: HCl at a concentration of 10% by mass Anticipated reaction : HCl + NaCN --> HCN(g) + NaCl RfC for HCN = C X 10 -3 mg . m-3 Assuming 100% of the HCl will react from HCN, estimate the hazard index and indicate whether or not the residents should be evacuated while the drums are being removed.

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Ally Wells answered 6 months ago

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