A type 3 floating turbidity curtain can be used in flow conditions of less than how many feet per second?

A type 3 floating turbidity curtain is specifically designed for use in water bodies where there are dynamic flow conditions, such as rivers or streams. This type of curtain is effective in controlling sediment and turbidity in environments that may experience moderate currents.

The correct choice indicates that this type of curtain can be utilized in flow conditions of less than 5 feet per second. This measurement is significant because exceeding this flow rate could compromise the functionality of the curtain, potentially allowing sediment and suspended particles to escape and therefore not providing adequate sediment control. It ensures that the turbidity curtain remains functional and maintains its position, thus effectively trapping sediments and minimizing turbidity in the water column.

In contexts where the flow exceeds this limit, other methods or stronger curtains may be necessary to ensure sediment control is achieved, which underscores the importance of understanding the specific capabilities and limitations of various turbidity curtains based on their design specifications.