Posted: 4/5/2006 8:40:33 PM EDT
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Gun range needs cleanup Arlington will spend $700,000 to remove lead shot and toxins left by clay pigeons.
By Scott Morris Herald Writer
ARLINGTON - Shooting pigeons could be hazardous to your health.
Clay pigeons, that is.
The saucer-sized targets used by skeet shooters contain carcinogenic polycyclic aromatic hydrocarbons, or cPAH, a compound suspected of contributing to cancer if its dust particles are inhaled. That's why Arlington is spending almost $700,000 to clean up clay pigeon shards. Those shards have accumulated in the soil over 38 years at an old shooting range on city property near Arlington Municipal Airport.
The cleanup was also recommended by the state Department of Ecology because of all the lead shotgun pellets that were sprayed across the field from 1945 to 1978, when the gun range was open, said Kent Wiken, a senior engineer for Shaw Environmental of Bothell.
All that lead is potentially toxic. By taking the soil to a hazardous waste landfill, the city can move forward with developing a large business park there without having to monitor for the toxins indefinitely, said Wiken, the city's consultant on the project.
Clay pigeons, while not as toxic as lead, still should be handled with care, according to the Ecology Department's recommendation.
"It's a voluntary cleanup," Wiken said. "It's not under any order, but Ecology really appreciates that the city of Arlington's been a good steward of their land."
As harmless as a clay pigeon might seem, Wiken said it's known as a hazard in his line of work.
"We've run across it before, so we knew we'd have to test for that," Wiken said.
The cleanup cost is high because it requires removing the top 12 to 15 inches of soil and transporting it to a hazardous waste landfill in Roosevelt in Klickitat County, Wiken said.
That's almost 6,500 cubic yards of soil, said Dale Carman, airport coordinator.
The cleanup also involves treating the lead-contaminated soil with cement kiln dust.
"It changes the pH of the soil so it's not mobile when it leaches when water moves through it," Wiken said.
Over the decades, the clay fragments and lead pellets settled deep into the soil at the old shooting range in two separate spots north of four concrete bunkers.
The clay fragments are scattered in an area closer to the bunkers, while the spent lead fell farther north, Carman said.
Tests originally showed both the target fragments and the lead pellets to be no deeper than 12 inches, said Kristin Banfield, assistant city administrator. But in recent days, crews found clay fragments deeper than that.
The city's original contract with Strider Construction of Bellingham called for removing the top 12 inches of soil, so the Arlington City Council approved a change order Monday to go deeper.
"It looks like 3 (extra) inches will be enough," Banfield said, based on subsequent testing.
All told, barring any further surprises, the project will cost $683,501, according to the contract.
Reporter Scott Morris: 425-339-3292 or [email protected].
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