Remedy proposed for cleanup of Hastings-on-Hudson gas plant

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ALBANY – The state Department of Environmental Conservation has released a proposed cleanup plan for the former manufactured gas plant property in Hastings-on-Hudson.
The property, at 8-12 Washington Avenue, was used as an MGP from approximately 1860 until it was decommissioned in between 1902 and 1912. The property has been used for both commercial and residential purposes since then.
Byproducts of the MGP, which remain on-site, include low levels of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs).  Surface soils at the site contain SVOC and metal contaminants at levels slightly exceeding the soil cleanup objectives for restricted residential use.  Groundwater contamination consists of VOCs and SVOCs and was primarily detected at on-site locations, with limited contamination detected in groundwater downgradient of the site in one area.
The proposed remedy for property remediation includes placing a deed restriction to limit use to restricted-residential, which also allows commercial and industrial used as permitted by local zoning. The use of groundwater as a source o potable or process water will require the necessary water quality treatment and compliance with an approved site management plan.  The plan also calls for further investigation and remediation if any of the existing buildings are demolished; evaluation of the potential for soil intrusion for future buildings developed on the site; and a monitoring plan to assess conditions at the site.
Written comments on the proposed plan are being accepted by the DEC until August 10.