Which of the following paving methods qualifies under Rule 310?

• A. Gravel
• B. Chip seal
• C. Loose sand
• D. Dirt

Answer: (B)

Chip seal qualifies under Rule 310 because it is a method commonly used for paving roads that effectively reduces dust generation while providing a durable surface. The chip seal process involves applying a layer of liquid asphalt to the road surface, followed by the application of aggregate chips. This not only enhances the road's longevity and performance but also creates a solid surface that minimizes the amount of dust that can be produced by vehicle traffic.

In contrast, methods like gravel, loose sand, and dirt do not meet the requirements of Rule 310 as they tend to generate significant amounts of dust. Gravel surfaces can be relatively stable, but without binding agents to keep particulates in place, they often lead to dust during dry conditions. Loose sand also lacks binding qualities, leading to erosion and dust production, while dirt surfaces generally have the highest propensity for dust generation, particularly when dry and exposed to traffic. Therefore, chip seal represents a compliant option under Rule 310 due to its effectiveness in controlling dust emissions.