Immediately put out all smoking materials and other open flames. Do not operate lights, appliances, telephones, or cell phones. Flames or sparks from these sources can trigger an explosion or a fire.
Turn off the main gas supply valve on your propane tank if it is safe to do so. To close the valve, turn it to the right (clockwise).
Notify others around to vacate the premises or building if need be then call Taylor Gas Company at 301-862-1000 or 911 or your local fire department.