The Most Hazardous Contaminated Places and Where They Are

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13. Watson Johnson Landfill
> Hazard Ranking System score: 70.7
> Location: Richland Township, Pennsylvania
> Listing Date 9/13/2001

Watson Johnson Landfill operated from the late 1950s to the early 1970s before the EPA put the site on its National Priorities List in 2001. Volatile organic compound (VOC) from the landfill contaminated some home wells and posed a health concern. A water main connection to residential wells threatened by the contamination was completed by 2006, and the EPA says no private drinking water wells are located near groundwater contamination.

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12. Centredale Manor Restoration Project
> Hazard Ranking System score: 70.7
> Location: North Providence, Rhode Island
> Listing Date 2/4/2000

The Centredale Manor Restoration Project, located about four miles northwest of Providence, Rhode Island, is the site of chemical manufacturing and drum reconditioning operations that took place from the early 1940s to the early 1970s. A fire destroyed most of the structures there in 1972. Because of previous operations at the site chemicals seeped into the ground and fed into the Woonasquatucket River and tainted sediment, streams, and ponds. EPA investigations from 1999 to 2012 revealed contamination of soil, groundwater, sediment, and surface water that contained dioxin and polychlorinated biphenyls, compounds the EPA regards as hazardous. The EPA took cleanup action from 1999 to 2002 and brought litigation against responsible parties that resulted in a $100 million cleanup plan in 2018.

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11. Former Nansemond Ordnance Depot
> Hazard Ranking System score: 70.7
> Location: Suffolk, Virginia
> Listing Date 7/22/1999

As the name would suggest, the Nansemond Ordnance Depot in Suffolk, Virginia, was where the army stored ammunition between 1917 and 1960. The site was also used by the Navy at the end of World War II to destroy explosives, ammunition, and chemicals. An abandoned landfill is on also on the site. The location of the Superfund site is near the Nansemond River and about 35 miles south of Newport News, Virginia. So far, the U.S. Army Corps of Engineers has removed about 400 munitions from the former ordnance depot that were considered live and warranted deactivation or disposal. Munitions removal activities considered by the EPA as non-critical continue.

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10. Pacific Sound Resources
> Hazard Ranking System score: 70.7
> Location: Seattle, Washington
> Listing Date 5/31/1994

Pacific Sounds Resources is an 83-acre site located on the south shore of Elliott Bay on Puget Sound. From 1909 to 1994, a wood-preserving plant operated there using creosote, pentachlorophenol, and metal-based solutions of copper, arsenic, and zinc. Much of that material spilled or leaked into the ground from treated wood products, contaminating the soil and groundwater. The Port of Seattle completed cleanup efforts in part of the area between 1996 and 1998, and the U.S. Army Corps of Engineers finished its remedial work at the site in 2005. The Port of Seattle is continuing maintenance at the site.

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9. Pearl Harbor Naval Complex
> Hazard Ranking System score: 70.8
> Location: Pearl Harbor, Hawaii
> Listing Date 10/14/1992

The Pearl Harbor Naval Complex site in Pearl Harbor, Hawaii, includes about 12,600 acres of land and water. It is an active military facility, and military-related activities there have contaminated soil, sediment and groundwater with metals, organic compounds and petroleum hydrocarbons. Environmental agency investigation and cleanup efforts continue. The EPA says the site poses no immediate threat to people or the environment.