4800 E RIVER RD
The 83-acre Naval Industrial Reserve Ordnance Plant (NIROP) site is located about 700 feet from the Mississippi River in Fridley, Minnesota. The U.S. Navy and its contractors produced advanced weapons systems at the facility from 1940 to 2012. In 1981, trichloroethylene (TCE) was discovered in on-site groundwater wells and in the City of Minneapolis' drinking water treatment plant intake pipe, which was located in the Mississippi River about 4,900 feet downstream from the site. In 1983, investigations identified pits and trenches in the "North 40" area of the NIROP site where drummed wastes had been disposed of. Contaminated soil and drums have since been excavated from the "North 40" area and properly disposed of at permitted landfills. In August 1988, a remedial investigation and feasibility study (RI/FS) was completed. The study indicated that groundwater originating from the site, contaminated primarily with TCE, was flowing into the Mississippi River at TCE concentrations of up to 10,000 parts per billion (ppb). In contrast, the Safe Drinking Water Act set the maximum contaminant limit (MCL) for TCE in public drinking water supplies at 5 ppb. Concentrations of TCE in area monitoring wells adjacent to the river have since decreased to levels ranging from non-detect to 150 ppb. Over 200,000 people live within three miles of the site. An estimated 29,000 people obtain drinking water from public wells located within three miles of the site; however, the majority of the population in the city of Minneapolis, estimated to be 500,000 residents, uses the Mississippi River as its primary drinking water source. The U.S. Environmental Protection Agency (EPA) proposed the NIROP site to the National Priorities List (NPL) in July 1989 and finalized the site on the NPL in November 1989. Site Responsibility The U.S. Navy is conducting the cleanup and groundwater monitoring action at the NIROP site under the oversight of EPA and the Minnesota Pollution Control Agency (MPCA).
7,963 |
People living within a 1 mile radius |
$63,385 |
Average Income |
3,192 |
Occupied homes |
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