(Source: LA Times)
The leftovers from car shredders have been used to cover trash at landfills, but state officials now say the practice has health risks and should be stopped. Industry officials say fluff is safe.
For years, auto-shredding companies have been hauling tons of these treated leftovers, known in the industry as fluff, to municipal landfills under a state variance granted more than 20 years ago.
State officials now say they are concerned that residue from heavy metals in the fluff could seep from landfills into groundwater, while airborne metal-laden particles could endanger workers at recycling plants and dumps and people living in neighborhoods near such facilities.
A change in state policy, if finalized, could mean that fluff may need to be transported under more strict conditions to special hazardous waste disposal sites, according to the state Department of Toxic Substances Control.
“We are of the opinion that the way cars are made is quite a bit different than 20 years ago,” said Colleen Heck, a department senior staff counsel. “We’re seeing increased amounts of lead, zinc and cadmium in the waste stream, so we think it’s no longer appropriate to allow them to operate” the same way they have in the past.
The department, which originally put the shredding industry on notice of a likely change in September, has twice granted extensions. The current deadline for making a final decision is June 30.
Recyclers dismiss the health concerns as baseless. They fear that being subjected to more stringent regulation could double or triple disposal costs, according to an industry-sponsored economic analysis. The proposed rules unintentionally could create more pollution by spurring recyclers to truck their fluff to distant, out-of-state dumps that have no restrictions on what they take.
Recyclers say they treat the fluff by coating it with cement during a chemical reaction that “fixes” the heavy metals and prevents seeping or leaching.
After treatment, the fluff is hauled to landfills, where it is spread 6 inches deep over each day’s dumpings to tamp down odors and keep birds, rats and other animals from getting at the garbage.
Treated fluff is an economical alternative to using sometimes scarce dirt to cover landfills, recyclers argue.
Environmental groups, which applaud the department’s push for more stringent shredding standards, question the safety of using treated fluff as landfill daily cover.