Many Treasure Island sites have been decontaminated through soil removal or capping, which entails covering the remaining toxic soil with a clay cap. But there is growing concern that coastal sites once considered sufficiently remediated may become problematic as sea levels rise. Contaminated soil could come in contact with ground water as the sea pushes it higher. Bay Area scientists and regulators are beginning to explore the problem given the large number of former military sites in the region.
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