Abstract
 Environmental Risk Assessment at Philadelphia Naval Reserve Basin Track: Environmental Management Author(s): Greg Berman Multibeam bathymetry coverage was achieved throughout the basin except within 50 feet of the bulkheads and below naval vessels. Casting lead lines at bulkheads, then interpolating with a tension spline filled near-bulkhead gaps in coverage. Kriging was used to fill gaps caused by naval vessels. These grids were joined in areas of dense multibeam coverage to generate a seamless union. Using a dredge depth of 32 feet, the basin was broken up into cells requiring 8,000 cubic yards of material removed. Chemical analyses on vibracores, at representative cells, were required to determine if dredging is a hazard to aquatic or human health. Historic drill logs were examined for depth to sand, and a grid was generated to estimate the depth of vibracore needed to achieve this depth at core locations throughout the basin. Chemical analyses were preformed on the vibracores to assess the potential risks. Greg Berman SAIC Admiral's Gate 221 Third street Newport , RI 02840 US Phone: 401-848-4644 E-mail: bermang@saic.com |
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