NCPI sponsored a project led by California consultants Ramseier and Riek. The committee formed during this project would later be known as the Bay Area Committee on Air Testing. This work led to the first ASTM Low-Pressure Air Test standard for sewer lines.

NCPI sponsored a project led by California consultants Ramseier and Riek. The committee formed during this project would later be known as the Bay Area Committee on Air Testing. This work led to the first ASTM Low-Pressure Air Test standard for sewer lines.