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| Figure 1. Four locations in Boston Harbor have been sampled periodically since 1977. Station 4 is in a sandy area and closest to the Deer Island sewage outfall. The remaining stations contain mostly silt and clay and are considered areas where sediment is actively deposited. The contaminated-sediment data base includes information on metal concentrations and other sediment parameters for about 3,000 samples collected throughout the harbor area. Numerals indicate monitoring station locations. |
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U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/fs/fs150-97/figures/fig1.html
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