Treatment of the groundwater in the areas further from the source of contamination, known as OU1, will be implemented after the OU2 cleanup is in place. EPA is developing the engineering design to cleanup groundwater contamination nearest the source of contamination, also known as OU2, using natural elements and heat to break up the contamination in place.
| City | Hewlett |
|---|---|
| County | Nassau County |
| State | New York |
| Coordinates | 40.64039, -73.69567 |
Peninsula Boulevard Groundwater Plume is a federal Superfund site in New York. The Superfund program, created by Congress in 1980, addresses sites where hazardous substances have been released or threaten release into the environment. EPA scores potential sites using the Hazard Ranking System; those that score high enough are placed on the National Priorities List.
Current status: Cleanup underway. Active cleanup is underway, meaning EPA has approved a remediation plan and work is in progress. Cleanup timelines vary widely — some sites take decades depending on contamination depth, groundwater involvement, and funding availability.
EPA has identified 7 contaminants of concern at this site, including 2-methoxy-2-methylpropane (mtbe), benzene, chloroethene (vinyl chloride). Contamination has been detected in groundwater, soil, soil gas.
If you live near this site and have health concerns, your state health department can provide site-specific guidance. EPA maintains a community involvement program for most NPL sites, and site documents — including the Record of Decision, five-year reviews, and public health assessments — are typically available through EPA's Superfund site profile.