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IN SITU WETLAND RESTORATION DEMONSTRATION: ESTCP COST AND PERFORMANCE REPORT
Ruiz, N., J. Bleiler, K. Gardner, M. Johnson, T. Estes, D. Anders, and D. Barclift.
ESTCP Project ER-200825, 55 pp, 2014
Specific objectives of the demonstration performed at Aberdeen Proving Ground, Maryland, were to evaluate the ability of activated carbon (AC) to reduce PCB bioavailability and associated risks in Canal Creek wetland habitats using a variety of AC delivery systems; provide cost and performance data; obtain regulatory agency and trustee acceptance; and disseminate lessons learned. Sequestration agents were mechanically deployed over the surface of a wetland and allowed to integrate into the surface layer of the hydric soil through natural mixing processes (e.g., bioturbation, tidal cycles, root mixing). The technologies deployed comprised a powder-activated carbon (PAC) slurry (the Slurry Spray), two pelletized AC products (AquaBlok® and SediMite™), and an engineered manufactured soil cover system (the Sand control). The goal was risk reduction, not mass removal; hence, performance was gauged through post-treatment evaluation of reduction in PCB bioavailability. While the findings of the overall program suggest that AC addition can sequester PCBs, the field demonstration findings were not conclusive in demonstrating effective reductions in bioavailability. See this report and the project summary presentation at the bottom of https://www.estcp.com/Program-Areas/Environmental-Restoration/Contaminated-Sediments/ER-200825 .
ESTCP Project ER-200825, 55 pp, 2014
Specific objectives of the demonstration performed at Aberdeen Proving Ground, Maryland, were to evaluate the ability of activated carbon (AC) to reduce PCB bioavailability and associated risks in Canal Creek wetland habitats using a variety of AC delivery systems; provide cost and performance data; obtain regulatory agency and trustee acceptance; and disseminate lessons learned. Sequestration agents were mechanically deployed over the surface of a wetland and allowed to integrate into the surface layer of the hydric soil through natural mixing processes (e.g., bioturbation, tidal cycles, root mixing). The technologies deployed comprised a powder-activated carbon (PAC) slurry (the Slurry Spray), two pelletized AC products (AquaBlok® and SediMite™), and an engineered manufactured soil cover system (the Sand control). The goal was risk reduction, not mass removal; hence, performance was gauged through post-treatment evaluation of reduction in PCB bioavailability. While the findings of the overall program suggest that AC addition can sequester PCBs, the field demonstration findings were not conclusive in demonstrating effective reductions in bioavailability. See this report and the project summary presentation at the bottom of https://www.estcp.com/Program-Areas/Environmental-Restoration/Contaminat
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