CDC Recommended Lead Levels Go Down, Exide Lead Numbers Go Up
Behind-the-scenes, many factors are driving the action between the City of Frisco and the owners of the Exide lead smelter that sits in the middle of town. We can only speculate for now. Meanwhile, let's look at some pressure points that entered the public record this last week on a collision course, and make the smelter's exit seem inevitable, no matter how much the state tries to stave it off.
On Wednesday, for the first time in 20 years, the federal government lowered the recommended limit for lead exposure in young children, where it can often do the most harm. And it wasn't just decreased by the Centers for Disease Control – it was slashed by 50%, from 10 micrograms of lead per deciliter of blood to 5.
If those sound like tiny amounts, that's because they are. But the bad news is that the overwhelming consensus of environmental health specialists is that numbers even below this amount are doing cognitive and behavioral harm to children. Even the CDC itself states that there is no known safe level of lead exposure. Not that any amount will do harm necessarily, but that any exposure is statistically capable of doing harm based on the field studies coming in. CDC estimates there are 450,000 kids nationwide that don't meet the new standard for a poison that will not honor it. We don't know how many children in Frisco fall into this category, but we do know, thanks to Dr. Howard Mielke of Tulane University, that the children the state health services agency tested for blood lead showed that 1.6 times more kids living in Frisco had blood lead levels above 2 micrograms per deciliter compared to the state as a whole – 60% above the norm.
Meanwhile, new monitoring results from around the Exide smelter show that it failed for a second month in a row to obtain the new federal standard for lead particles in air of .15 micrograms (Look under "Monitoring Data" and download). In March the three month rolling average for March was.19 and .22 for April. This would mean more if TCEQ had not granted a 13 month free pass to break the standard instead of enforcing a deadline in November of this year.
Did we mention that the new air-lead standard is of course based on the science behind the old blood lead level of 10 micrograms per deciliter, and therefore instantly obsolete even before Exide has to comply with it? The regulations are forever chasing the science. It might take another 4 to 10 years to lower the lead-air standard. And then more research will show even more subtle effects of lead at lower levels of exposure and so on. People who live around facilities like Exide can never win. And sooner or later, Exide lawyers or its insurance companies will be explaining why its a really bad idea to keep operating a lead smelter in a densely populated area that includes gated communities where people can spend a lot of money on attorneys themselves. We hear that things are proceeding apace in some kind of "peace with honor" resolution to this train wreck between the city and he company. Surely this last week's news can't help but spur those discussions.