State health officials are warning of health risks from eating fish caught in Walnut Creek and Rocky Branch in South Raleigh, and from the Neuse River just below Crabtree Creek to Auburn-Knightdale Road.
Fish found in those waterways may contain high levels of polychlorinated biphenyls (PCBs), toxic chemicals that were once widely used as coolants and lubricants in electrical transformers but have been banned in the United States since 1977. PCBs are
known to cause cancer, they've been associated with neurobehavioral and immunological changes in children, and they're
toxic to the liver.
Last month, the N.C. Department of Health and Human Services
issued advisories recommending that people limit their consumption of carp and catfish from those waterways to no more than one meal per month. It also advises people to limit consumption of all other fish from Walnut Creek and Rocky Branch to no more than one meal per week.
These latest PCB-related fish advisories come on top of others issued in recent years for Raleigh's Crabtree Creek and Brier Creek as well as nearby Lake Crabtree, a popular fishing spot.
In these earlier cases, the PCB pollution came from
Ward Transformer, a Raleigh company that refurbishes electrical equipment near the RDU International Airport. In 2003, Ward Transformer's property in northwest Raleigh was
added to the federal Superfund list, which puts it among the most toxic sites in the United States. Besides PCBs, other contaminants of concern from the Ward site are dioxins, furans, arsenic, chromium, copper, lead, manganese, and zinc.
Ward Transformer is also notorious for an
incident in the late 1970s, when contractors hired by the company sprayed PCB-contaminated oil along hundreds of miles of roads throughout that state. After the dumping was discovered, then-Gov. Jim Hunt ordered the contaminated soil to be scraped up and dumped in Warren County north of the Triangle. The struggle that ensued involving residents of that majority African-American community -- first against the dumping and later to get the toxic dump cleaned up -- is often said to mark the beginning of the U.S. environmental justice movement.
As it turns out, Ward Transformer is also behind Raleigh's latest PCB woes. Back when the company was known as Electric Motor and Transformer, it had locations in the city at
1900 S. Saunders St. just north of the Beltline,
418 S. Dawson St. just south of Nash Square, and at
the intersection of South Saunders and Jamaica Drive, near the turnoff for Lake Wheeler Road. As state toxicologist Luanne Williams reported in a March 2007
risk assessment [pdf]:
Rocky Branch Creek flows southeast along the south side of Jamaica Drive and runoff from the South Dawson Street area flowed to an unnamed tributary to the creek. Therefore, in the past runoff carrying PCBs from these facilities where transformers were reconditioned may have entered into Rocky Branch Creek and Walnut Creek. These waterbodies are approximately 7 miles from the Neuse River location of where elevated Aroclor 1260 levels have been found in catfish and largemouth bass. According to the March 30, 2006 North Carolina Superfund Section reports, Aroclor 1260 has been found in sediment samples all along Walnut Creek and Rocky Branch located approximately 7 miles from the Neuse River to where Walnut Creek enters the Neuse River. Walnut Creek leads into the Neuse River and Rocky Branch leads into the Walnut Creek about 6 ½ miles from where Walnut Creek enters the Neuse River.
Aroclor 1260 is a highly chlorinated PCB mixture that was manufactured by Monsanto. Environmentally persistent and resistant to degradation, Aroclor adheres to soil and sediment and builds up in the fat stores of fish and any creatures who eat the fish, including humans.
In an e-mailed statement about the recently discovered contamination, Upper Neuse Riverkeeper Dean Naujoks of the
Neuse River Foundation said his group would be "dealing with the issue of liability and who is responsible for the clean-up for many years to come."
Labels: PCBs, toxic pollution, ward transformer, water pollution