Odors

Origin of Odors

Coal tar contamination in the subsurface Pre-clearing/Excavation Active In-situ Solidification Stockpiles Site Maintenance

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Odors

Site-wide Odor/Dust Mitigation Methods

Improved methods and increased frequency as odors increased

RUSMAR foam Posi-shell Misters along fence Poly plastic sheeting Other methods

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Odors

Pre-clearing / Excavation

Previously: Multiple cells open for debris removal, 7 days ahead

Currently: Fewer cells, 1 day ahead

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Odors

Active In-situ Solidification (ISS)

Previously: Deep clearing being performed ahead of active ISS cells

Currently: Same day as ISS Soil mixing releases vapors

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4/10/2018

Region 2 serving the people of New Jersey, New York, Puerto Rico and the U.S. Virgin Islands

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Odors

Stockpile Management

Previously: Multiple stockpiles, including bermed materials, across site

Currently: Stockpiles managed in central location

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Odors

Site Maintenance

Previously: Grading completed at end Currently:

Grading following completion of ISS in each area Completed ISS will be covered with gravel or Posi-Shell to

minimize standing water and reduce working zones

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Odors

Weather Impacts

Changes in temperature, humidity, and precipitation Wind speed and direction

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Block 93 Dust

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