Code of Maryland Regulations Title 03 — Comptroller
COMAR 03.03.05.12 — § 12 Warning for Water.
.12 Warning for Water.
A warning shall be issued to the retail service station dealer whenever an underground storage tank is found to contain 2 inches or more of water as determined by the use of water-finding paste on a gauge stick. A “Stop Sale” order will be issued if the water is not removed within the time period prescribed by the Bureau.
Source: official text