(a) A Type 1 leak is one which, due to its location and/or relative magnitude, constitutes a potentially hazardous condition to the public or buildings.
(b) A Type 1 leak requires an immediate effort to protect life and property.
(c) Continuous action shall be thereafter taken until the condition is no longer hazardous.
(d) Completion of repairs shall be scheduled on a regular day-after-day basis, or the condition kept under daily surveillance until the source of the leak has been corrected.
(e) Type 1 leaks include, but are not limited to:
(1) damage by contractors or outside sources resulting in leakage;
(2) any indication on a combustible gas indicator (CGI) of natural gas entering buildings or tunnels;
(3) any reading on a CGI within five feet (1.5 meters) of a building wall;
(4) any reading of four percent or greater gas-in-air on a CGI within manholes, vaults or catch basins (sampling will be conducted with the structure in its normal condition as nearly as physically possible); or
(5) any leak which, in the judgment of the operating personnel at the scene, is regarded as potentially hazardous.