When the source of contamination is a liquid mixture and the atmospheric composition is assumed to be similar to that of the original material, e.g., on a time-weighted average exposure basis, all of the liquid (solvent) mixture eventually evaporates. Use the percent composition (by weight) of the liquid mixture as the decimal fraction. (Example: 0.43=43%). The TLVs of the constituents must be listed in mg/m3. (ACGIH TLVs)
| Variable | Unit |
|---|---|
| TLVmix | mg/m3 |
| Fn | decimal (fractional share of mixture as a decimal) |
| TLVn | mg/m3 |