(AGENPARL) – mer 03 aprile 2024 Issued: Apr 3, 2024 (12:55pm EDT)
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EPA Issues Final Cleanup Plan for New Cassel/Hicksville Groundwater
Contamination Superfund Site in Nassau County, New York
NEW YORK (April 3, 2024) – The U.S. Environmental Protection Agency (EPA) has
issued a final cleanup plan to address contaminated groundwater at a portion
of the New Cassel/Hicksville Groundwater Contamination Superfund site within
the Towns of Hempstead, North Hempstead, and Oyster Bay in Nassau County, New
York. The groundwater at this site is contaminated with volatile organic
compounds (VOCs). The final cleanup plan calls for installing a network of
wells and underground pipes in a residential neighborhood (Salisbury, New
York) to collect and move contaminated groundwater to a new water treatment
facility.
“Ensuring access to clean drinking water is one of EPA’s most important
missions and this cleanup plan will advance that goal,” said EPA Regional
Administrator Lisa F. Garcia. “Our final cleanup plan is a significant step
forward in reducing the potential impacts from chemical contamination to
residents in Nassau County.”
Residents in the impacted areas currently receive drinking water from public
water supplies that have treatment systems installed and monitor water quality
to ensure that the drinking water meets federal and state standards. The final
cleanup plan will prevent people from potentially being exposed to the
VOC-contaminated groundwater in the future, help minimize the potential for
the contaminated groundwater to spread further and treat the groundwater to
meet strict federal and state standards for drinking water. Many volatile
organic compounds are known to cause cancer. Some volatile organic compounds
have no known health effects. The extent and nature of potential health
effects depend on many factors, including the level and length of exposure.
The next phase of work involves the development of detailed specifications for
the various components of the treatment system. As part of this phase of work,
referred to as the remedial design, additional groundwater monitoring wells
will be drilled and sampled. Based on the results of the remedial design
phase, EPA will decide where the extraction wells and water treatment facility
will be built.
Options for how the treated water will be released will also be evaluated
during the design of the cleanup plan, including releasing treated water back
to the ground, to surface water, to a recharge basin or into the sewer. The
final cleanup plan also requires long-term monitoring of the groundwater
quality and relies on existing county and state restrictions on groundwater
use to ensure that public drinking water wells are not installed without a
permit.
For additional background and to see the final cleanup plan, visit the New
Cassel/Hicksville Groundwater Contamination Superfund site profile page
including EPA’s responses to the public comments that were received.