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Title: Innovative and effective landfill treatment

An innovative and effective metals treatment technology was developed for a Superfund site landfill. The new landfill technology reduced the remedial cost of that operable unit from $34 million (MM) to $12 MM. In 1993, EPA issued a Record of Decision (ROD) for a Superfund site in Newport, Delaware. Among other remedies, deep-soil mixing was specified for a 16-acre landfill. New information on waste volumes developed in the remedial design phase increased the cost of the remedy from $14 MM to $34 MM. An alternative treatment technology was developed to immobilize the metal contaminants with no increase in volume. EPA was included early in the development to ensure the proposal would be focused on issues critical to its review and acceptance. EPA accepted this technology and issued an Explanation of Significant Differences decision. the new remedy is estimated to cost $12 MM. The constituents of concern at the site are primarily metals: barium, lead, zinc, and cadmium. A treatment technology was developed which employed straight-forward chemical precipitation: sulfate addition for barium and sulfide addition for lead, zinc, and cadmium. The combined effect of numerous competing chemical equilibrium effects was modeled with the Environmental Simulation Program (ESP), a state-of-the-art equilibrium simulationmore » program from OLI Systems, Inc. Due to the potential effects of acid rain, limestone was added to the treatment plan.« less
Authors:
;  [1] ;  [2]
  1. DuPont Environmental Remediation Services, Wilmington, DE (United States)
  2. DuPont Engineering, Wilmington, DE (United States)
Publication Date:
OSTI Identifier:
488884
Report Number(s):
CONF-9610152-
TRN: IM9728%%75
Resource Type:
Conference
Resource Relation:
Conference: 17. Superfund hazardous waste conference, Washington, DC (United States), 15-17 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of Hazwaste world, Superfund XVII: Conference proceedings; PB: 879 p.
Publisher:
E.J. Krause and Associates, Inc., Bethesda, MD (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SANITARY LANDFILLS; REMEDIAL ACTION; US SUPERFUND; BARIUM; LEAD; ZINC; DELAWARE; TECHNOLOGY ASSESSMENT; MATHEMATICAL MODELS