In a parts-cleaning shop, a worker’s breathing-zone air contains 325 ppm airborn

Question

In a parts-cleaning shop, a worker’s breathing-zone air contains 325 ppm airborne rubber solvent (naphtha) (TLV= 400 ppm) and 106 ppm airborne stoddard solvent (TLV = 100 ppm). From this information and ACGIH guidelines on the application of TLVs, it is reasonable to conclude that (choose the best answer!):

a. Stoddard solvent is in an unsafe and dangerous concentration.

b. Stoddard solvent is more toxic than rubber solvent.

c. The chemical hazard control efforts in this shop should be focussed on stoddard solvent exposure first.

d. No worker will experience any discomfort or health problem if the concentration of stoddard solvent is brought down to 99 ppm. e. None of the above

Explanation / Answer

Lesser the TLV in ppm more will be the danger.

Here the best suited option is (b)

Stoddard solvent is more toxic than rubber solvent.

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