HIGHLANDS, Texas (AP) -- As Dwight Chandler sipped beer and swept out the thick muck caked inside his devastated home, he worried whether Harvey's floodwaters had also washed in pollution from the old acid pit just a couple blocks away.
Long a center of the nation's petrochemical industry, the Houston metro area has more than a dozen Superfund sites, designated by the Environmental Protection Agency as being among America's most intensely contaminated places. Many are now flooded, with the risk that waters were stirring dangerous sediment.
The Highlands Acid Pit site near Chandler's home was filled in the 1950s with toxic sludge and sulfuric acid from oil and gas operations. Though 22,000 cubic yards of hazardous waste and soil were excavated from the acid pits in the 1980s, the site is still considered a potential threat to groundwater, and the EPA maintains monitoring wells there.
When he was growing up in Highlands, Chandler, now 62, said he and his friends used to swim in the by-then abandoned pit.
"My daddy talks about having bird dogs down there to run and the acid would eat the pads off their feet," he recounted on Thursday. "We didn't know any better."
The Associated Press surveyed seven Superfund sites in and around Houston during the flooding. All had been inundated with water, in some cases many feet deep.
On Saturday, hours after the AP published its first report, the EPA said it had reviewed aerial imagery confirming that 13 of the 41 Superfund sites in Texas were flooded by Harvey and were "experiencing possible damage" due to the storm.