Hazardous Waste Cleanup: National Standard - Impoundment Area (Formerly: Mount Joy Wire Company) in Mount Joy, Pennsylvania

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Cleanup Status

This facility is one of EPA Region 3’s high priority Resource Conservation and Recovery Act (RCRA) corrective action sites. The facility has conducted several environmental investigations at the site, including soil and groundwater sampling. The latest corrective measures evaluation was conducted on 4/16/2013.

On January 13, 1992, the PADEP determined that the former hazardous waste surface impoundment area had been closed in accordance with the closure portion of the approved closure/post closure plan.

In Mary 2005, EPA and the State have determined that the Human Exposures Indicator have been met. EPA is currently evaluating the information to determine if all of the corrective action requirements have been met. The closure permit for the waste disposal impoundment was approved by Pennsylvania Department of Environmental Protection on 4/25/2008.

In August 2016, EPA and the State have determined that the Groundwater Migration has been under control.

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Site Description

Interactive Map of National Standard - Impoundment Area, Mount Joy, Pennsylvania


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The National-Standard Company's former Mount Joy facility is located in Mount Joy, Lancaster County, Pennsylvania. The facility was sold to Mount Joy Wire Corporation in 1991. The site covers approximately 27 acres. The facility is an active manufacturer of steel and specially plated wires. The process of making wire uses acidic, alkaline and other caustic or corrosive liquids. The process involves drawing, heat-treating, cleaning, descaling, plating and finishing of wire. Rinse waters from the chemical processing were (are) treated at their permitted onsite wastewater treatment plant. If the treatment plant could not keep pace with the incoming flow or the filter area was down, rinse waters were directed into a hypalon lined concrete impoundment, which was constructed in 1978/1979 to provide temporary storage of process wastes.

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Contaminants at this Facility

Historically, Chloride, Iron, Lead, Manganese, Nitrates, Sodium and Sulfate exceeded Primary/secondary maximum containment levels onsite.

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Institutional and Engineering Controls at this Facility

The need for institutional controls has yet to be determined.

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Land Reuse Information at this Facility

The site under continued use.

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Site Responsibility at this Facility

RCRA Corrective Action activities at this facility have been conducted under the direction of EPA Region 3 with assistance from Pennsylvania Department of Environmental Protection.

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