These figures belong to the named source and method. Historical costs are not current quotations. A value without its stage, material basis or measurement location is not a farm instruction.
| What is measured | Value and basis | Source and limitation |
|---|---|---|
| Severe airing target | 1000 ppm | ICAR-DMR manual, 2011. Reached within 12 hours |
| Soft airing at 48 hours | 4000 ppm | ICAR-DMR manual, 2011. Then 2,000 and 1,000 by 72 hours |

