A regenerative thermal oxidizer (RTO), is to be designed to incinerate toluene from a manufacturing process waste stream with an efficiency of 99.99%. The incinerator is to be designed to operate at 1250oF. A young engineer under your supervision has designed an incinerator with an average fluid residence time equal to 4.0 s. Evaluate this design, and recommend whether to proceed with the design, or redesign based on a lower (or higher) residence time. If necessary, recommend an appropriate design value for the residence time. Explain your recommendations.