Closed-Circuit Television Inspection (CCTV)

Inspection method utilizing a closed circuit television camera system with appropriate transport and lighting mechanisms to view the interior surface of sewer pipes and structures.

Clutch

A mechanical device that engages or disengages rotary torque from a power source.

Cobble

Per ASTMAmerican Society of Testing and Materials; technical organization formed for the development of standards on characteristics and performance of materials, products, systems and services, and the promotion of related knowledge. D653, a rock fragment, usually rounded or semirounded, with dimensions between 3 and 12 in. (75 and 305 mm).

COD

Chemical Oxygen Demand; a measure of the need for oxygen by chemical processes.

Coefficient

A scientifically based factor that is taken into account during calculations.