Legend has it that a common rallying cry among the brave souls who ventured west to seek their fortune in the 1840s and 1850s during the California Gold Rush was: “There’s gold in them thar hills.” Though much less dramatic, it wouldn’t be out of bounds for those involved in the propane business these days to exclaim: “There’s gold in them thar vapors.” It has long been an accepted fact of life in the propane business that when purging pro

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