Jet fuel in U.S warship's drinking water, even after system flushed & restored

United States' nuclear-powered warship's drinking water contaminated with jet fuel. Persistent issue, despite indications last week that the system was flushed & restored. Warship relying on San Diego municipal water supply, plans to leave the pier delayed. Traces of jet fuel were first found on 16th, while the ship was in the Pacific Ocean.