LSI 2010 NRD Santa Fe final conference binder 072110.pdf

Sheri L. Moreno of General Electric Company Speaker 15: 4
Phase 1: What was Accomplished
• 286,000 cubic yards of sediment
removed, enough to cover 50 football
fields to depth
of three feet
— Surpassed EPA’s goal to
remove 265,000 cubic yards
— 35,000 pounds of PCBs
removed
• 150,000 cubic yards of clean fill
placed
in dredged areas
• 50,000 plants to be placed by divers
this summer to restore habitat
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Phase 1 Findings — Resuspension
• Resuspension was far greater than EPA
projected: 3% to 4% of PCBs dredged
washed downstream
• GE implemented every best management practice
required by EPA to control resuspension
• Higher resuspension led to higher PCB levels in
water, fish, sediment and downstream during and
after dredging
• Higher resuspension levels interrupted long-term
decline in PCB levels in water and fish
• Resuspension led to PCBs settling downstream on top
of sediments not targeted for removal
• As a result of higher resuspension, EPA standards to protect water were not met
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Law Seminars International | Natural Resource Damages | 07/15/10 in Santa Fe, NM