High Consequence Areas. Another term from the compendium. If a pipeline rupture could affect a populated area, a drinking water source, or an ecologically sensitive zone, the operator had to jump through additional hoops. The problem was that the definition of HCA had changed three times since the pipe was laid. What was once a quiet stretch of ranchland was now a suburban development with a school half a mile from the right-of-way.
The answer was not in the soil. It was in a three-ring binder back in Houston, and in 1,200 pages of dense, single-column text that most engineers only opened when something went wrong. asme pipeline standards compendium
Elena’s boss, a harried operations director named Mark, stormed into the trailer. "The EPA is asking about maximum allowable operating pressure. Did we ever recertify after the HCA expansion?" High Consequence Areas
"The standard didn't fail," Elena said quietly, more to herself than to Mark. "We chose to interpret it loosely." The problem was that the definition of HCA