3 ms·

In addition to telephone, electrical power distribution is still accomplished using PILC cable (paper insulated, lead covered.) There's tons of it under NYC and

In addition to telephone, electrical power distribution is still accomplished using PILC cable (paper insulated, lead covered.) There's tons of it under NYC and it is still manufactured to this day. And since the insulation is oil soaked paper, there's a good chance the oil is contaminated with PCB's. Back in high school electrician shop class we had a few sections of medium and high voltage distribution and transmission cable (The cross sections were neat to look at esp the 130kV 1000 MCM that was about 4 inches in diameter). One of which was a 1 foot length of PILC partly stripped to show the construction and mounted to a wooden base. It sat out in the open on a table covered in dust and lead oxide. After touching it our shop teacher made sure to tell us to thoroughly wash our hands. edit: forgot to mention lead water mains that still exist. Family friend worked for the DEP and said they liked to "leave the lead be" as the harmful oxides were on the outside of the pipe and not a major threat to the water within. Disturbing the pipes was said to be a larger hazard than leaving them in service.

quercusa 3y ago
The Flint water crisis was caused by failing to perform corrosion control: In April 2014, because of annual rate increases from the DWSD, the Flint City Council voted to join the Karegnondi Water Authority (KWA), which would be developing a raw water supply pipeline from Lake Huron. The water supply contract with DWSD was subsequently terminated, and the Flint water treatment plant began treating water from the Flint River on a full-time basis and distributing the treated water to residents and other customers. When the plant went into full-time operation, the Michigan Department of Environmental Quality (MDEQ) did not implement corrosion control, as mandated by the LCR. Instead, the Flint water treatment plant was allowed to complete two six-month monitoring periods without corrosion control and then the MDEQ would decide if corrosion control treatment was necessary. https://www.materialsperformance.com/articles/material-selection-design/2016/06/the-science-behind-it-corrosion-caused-lead-tainted-water-in-flint-michigan https://www.materialsperformance.com/articles/material-selec...

quercusa 3y ago

The Flint water crisis was caused by failing to perform corrosion control: In April 2014, because of annual rate increases from the DWSD, the Flint City Council voted to join the Karegnondi Water Authority (KWA), which would be developing a raw water supply pipeline from Lake Huron. The water supply contract with DWSD was subsequently terminated, and the Flint water treatment plant began treating water from the Flint River on a full-time basis and distributing the treated water to residents and other customers. When the plant went into full-time operation, the Michigan Department of Environmental Quality (MDEQ) did not implement corrosion control, as mandated by the LCR. Instead, the Flint water treatment plant was allowed to complete two six-month monitoring periods without corrosion control and then the MDEQ would decide if corrosion control treatment was necessary. https://www.materialsperformance.com/articles/material-selection-design/2016/06/the-science-behind-it-corrosion-caused-lead-tainted-water-in-flint-michigan https://www.materialsperformance.com/articles/material-selec...