RACHEL RASKIN-ZRIHEN The redevelopment of Mare Island Naval Shipyard remains a work in progress, nearly a quarter-century since the U.S. government shut down the military facility. Several early efforts at private redevelopment of the island were slow to take off. Most recently, the city learned that soil in the north part of the island is âwaterloggedâ and could liquefy in an earthquake, Vallejo Mayor Bob Sampayan said in an interview last week. âIn its present condition, it is not suitable for development just yet,â he said of the islandâs north part. âThe Navy had to make sure the area was free of toxins, and they did that, and there are only a couple of pockets that still need remediation,â Sampayan said.