U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


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INTERIM MEASURES CONSTRUCTION REPORT, IN-SITU GROUNDWATER TREATMENT: FORMER ROD AND WIRE MILL AREA, TRADEPOINT ATLANTIC, SPARROWS POINT, MARYLAND
Maryland Department of the Environment, 349 pp, 2018

Parcel A3, the site of a rod and wire mill manufacturing complex, was part of a former integrated steel mill complex operated chiefly by Bethlehem Steel Corporation. Historical operations resulted in releases of cadmium and zinc to soil and groundwater. At Parcel A3, groundwater pump and treat operating since 2001 was suspended to allow the construction of remediation trenches in 2017. A blend of alkaline reagents [TerrabondMG (40% by weight) and crushed limestone (60% by weight)] was placed into trenches arranged in a staggered/offset alignment perpendicular to groundwater flow. This arrangement corresponded with elevated concentrations of Cd and Zn within the intermediate zone groundwater. The alkaline reagent is expected to react with the low pH groundwater to increase the pH sufficiently to precipitate dissolved Cd and Zn as well as form chemical bonds that further limit Cd and Zn mobility in the groundwater. This report provides very early results of the performance of the interim measure. See this report and other technical information on work at the Tradepoint Atlantic site at http://mde.maryland.gov/programs/LAND/MarylandBrownfieldVCP/Pages/SPVoluntaryCleanupProgram.aspx.



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