Harbor Isle

The project consisted of re mediating an 11.6-acre former petroleum storage facility that was part of the NYSDEC Brownfield program. Historic operations of the facility resulted in widespread petroleum contamination in the soil. Contamination was limited based on site conditions, which included an impermeable bog layer that stopped the vertical migration and a bulkhead to prevent the horizontal migration into the adjacent canal.

Remediation was achieved by excavating approximately 61,000 tons of grossly contaminated soil, backfilling with clean material in the replacement of approximately 1,200 linear feet of a new bulkhead. All soil that was excavated was shipped to and processed by the new Posillico Soil Wash Plant in Farmingdale, under its NYSDEC Part 360 Permit. All site work was performed under NYSDEC oversight.

Contaminated soil from this project, which is normally landfilled, was the first to be successfully treated at Posillico's Soil Wash Plant. The processed soil was reused as clean backfill and as a recycled raw material to produce asphalt pavement for projects across Nassau and Suffolk counties. The Soil Wash Plant provided a much-needed sustainable option for soil disposal in the region. Diverting contaminated soil from landfills curtails carbon emissions and reduces the need to extract virgin materials for construction projects. Treating contaminated soil requires less energy compared to obtaining and shipping raw materials, providing cost savings to companies that opt to reuse soil. Additionally, the technology utilized by the Soil Wash Plant contributes to the meeting the State's goals to reduce its impact on climate change.

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