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Case Study Habitat Restoration

• RCRA Corrective Action Site
• Oil Refinery
• E-Pond SWMU
• Lima, Ohio

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Pre-sampling site visit
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RFI Media Sampling E-Pond

• 13 Soil borings
• 29 Subsurface soil samples
• 5 Surface Soil Samples
• 6 Groundwater monitoring wells
• 17 Groundwater samples

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E-Pond Risk Assessment Results

• Ecological - Unacceptable level of risk to
  potential receptors due to elevated levels of
  chromium, antimony, thallium, and PCB-1248 in the
  surface soil.
• Human Health - Cumulative cancer risk for
  exposure to surface soil for the hunter/
  trespasser is 1 x 10 4.

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Hazardous Constituents in Surface Soils
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Planning for Future Use at E-Pond

• Lisa Appel, Wildlife Habitat Council, tours
  site.
• Opportunities Report for Wildlife Habitat
  Enhancement at BP Lima's Oil Refinery Properties
  April 2001.
• Integrate habitat opportunities with site
  conditions.
• Cleanup goals must meet needs of future use plans.

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E-Pond Corrective Measures

• Protective Cover due to elevated levels of
  constituents in the surface soils.
• Groundwater Monitoring to assure contamination
  does not migrate off-site.
• Operation and Maintenance Plan to address the
  long-term integrity of the cover.

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Protective Cover

• Synthetic root penetration barrier
• 12 inches of clean soil
• Organic augmentation to achieve optimal organic
  content. (From the Lima Wastewater Treatment
  Plant)

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Components of the Remedy for E-Pond

• Placement of a cover
• Site grading, and
• Ecological revitalization consisting of planting
  native species on the site.

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E-Pond Spring 2002
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Conclusions

• Plan your investigation to evaluate both human
  health and ecological risk.
• Cleanup requirements must meet future use needs.
• Mitigate ecological risk.
• Ecological enhancement project should not become
  an attractive nuisance.

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The EndFor further information, contact Thomas
Matheson at matheson.thomas_at_epa.gov
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