Reception/Exit Shaft/Pit

Excavation into which trenchless technology equipment is driven and recovered following the installation of the product pipe, conduit, or cable.

Reduction

Gain of electrons, as when copper is electro-plated on steel from a copper sulfate solution (opposite of “Oxidation”).

Regression Analysis

An evaluation of the long-term hoop stress data. A linear curve is calculated using the least Squares method to fit the logarithm of hoop stress versus the logarithm of the resulting hours-to-failure.

Regulator

A device for controlling the quantity of sewage and storm water admitted from a combined sewer collector line into an interceptor, pump station or treatment facility, thereby determining the amount and quality of the flow discharged through an overflow device to receiving waters or other points of disposal.