What increase in maximum allowable quantity is permitted for toxic solids stored in an approved cabinet or sprinkler storage?

The correct choice indicates that a 200 percent increase in the maximum allowable quantity of toxic solids is permitted when these materials are stored in an approved cabinet or in sprinklered storage. This increase is based on safety provisions outlined in fire codes that aim to manage the risks associated with the storage and handling of hazardous materials.

When toxic solids are stored correctly in an approved cabinet or in buildings equipped with sprinkler systems, the enhanced safety measures effectively mitigate the associated risks. This allows for a larger stockpile of these materials to be maintained, as the proper containment and fire suppression systems significantly reduce the likelihood of a fire incident and the potential for exposure to harmful substances.

It's important to note that specific regulations and codes may also dictate further provisions for such storage depending on the nature of the toxic solids, their physical and chemical properties, and the classifications under various fire safety regulations. However, the overarching rule of allowing a 200 percent increase is an established guideline that facilitates operational efficiency while prioritizing safety in environments dealing with hazardous materials.