They were turned off after a 1997 test of the water by the State Department of Labor found high concentrations of lead.
Irvington's cleanup plan included removing several leach fields where the highest concentrations of lead were found and laying a soil cap across the site.
MEDTOX SCIENTIFIC, St . Paul a laboratory services provider, said it had acquired Leadtech, operator of a clinic that tests children for concentrations of lead in their blood, for $6.2 million in cash and stock.
By comparison, the Consumer Product Safety Commission is considering a ban on children's jewelry with concentrations of lead higher than 600 parts per million, said Scott Wolfson, a spokesman for the commission.
It wasn't until May this year that the Achuar's complaints of contamination were officially vindicated when Peru's health ministry found high concentrations of lead and cadmium in the blood samples of more than 200 of them.
Cathode-ray tubes, with their high concentrations of lead and chemically hazardous phosphors, are the most difficult of all e-waste to process.
The average concentration of aluminum in the lip products, for instance, topped 5,000 p.p.m.; concentrations of lead averaged 0.359 p.p.m.
The deaths occurred in seven villages in Zamfara State, where runoff from illegal gold mining, which contains high concentrations of lead, entered the soil and water supply.
A medical researcher from nearby Shantou University found concentrations of lead in the blood of local children to be on average 49% over the maximum safe level.
Baldantoni et al. (2004) reported that the shoots of Najas marina show higher concentrations of lead.
Babovic et al. (2010) observed that the leaves of Phragmites communis accumulated less concentrations of lead.
