• Remediation of American Creosote Works Superfund Site

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Remediation of American Creosote Works Superfund Site

Louisville, MS

CLIENT:              USACE Mobile District & USEPA Region 4

CONTRACT:      CORE Prime Contract W91278-12-D-0002-0001

VALUE:              $18,001,546

OVERVIEW:

  • COCs: PAHs & dioxins in soil; PAHs in sediment; VOCs & SVOCs in groundwater.
  • Excavated 48,000 CY of contaminated soil from the ACW Site.
  • Excavated 40,000 CY of sediment from Railroad Lake and Hughes Creek (including about 4,000 linear ft of Hughes Creek downstream of the ACW Site). 
  • Closed Railroad Lake with no downstream loss of contaminants.
  • Consolidated the excavated soil and sediment into an onsite disposal area, consistent with RCRA Subtitle D landfill design requirements.
  • Constructed a subsurface barrier wall around the soil/sediment disposal area (perimeter length 4,500 ft, average depth 40 ft).
  • Treated approximately 52,000 CY of excavated soil/sediment to form a 2-foot thick subsurface cap over 16 acres of the disposal area.
  • Capped the entire disposal area with a low permeability cap.
  • Implemented a long-term monitoring program.
  • Prepared and received USACE, USEPA, MSDEQ approval of APP, QC Plan, UFP-QAPP Work Plan, Design, and Reports