The filling of a tank to be protected by water loading shall be started as soon as flood waters are predicted to reach a dangerous flood stage. Where independently fueled water pumps are relied upon, sufficient fuel shall be available at all times to permit continuing operations until all tanks are filled. Tank valves shall be closed and locked in closed position when water loading has been completed.
34 Pa. Code § 14a.214
This section cited in 34 Pa. Code § 14a.4 (relating to anchorage); 34 Pa. Code § 14a.23 (relating to anchorage); and 34 Pa. Code § 14a.211 (relating to scope).