Surcharge Condition

When the sewer flow depth equals or exceeds the diameter of the discharging sewer line.

Surcharged Sewer

A gravity sewer that is overloaded beyond its pipe full flow capacity such that the flow becomes pressurized.

Surety

The corporate body which is bound with the contractor and which engages to be responsible for the contractor and his acceptable performance of the work.

Surface Hardness

A measure of the net increase in depth as an indented load is increased from a minor load to a major load and then returned to a minor load. This is used as an indication of relative hardness among like materials.

Survey Tools

Downhole equipment and instruments used to determine the position of a bore in directional drilling or in site investigation.