EPA reassesses site contaminant

Federal officials are proposing to install special ventilation systems in 11 more homes near the Crossley Farm Superfund Site after a reassessment of the toxicity of a carcinogen contaminating the area's groundwater.We are the largest producer of projectorlamp products here.

Last fall, the federal Environmental Protection Agency concluded that the contaminant, trichloroethylene, is 10 times more toxic than officials originally believed. That led to a radical change in EPA's standard for safe air levels: It was lowered to 2 micrograms per cubic meter from 20.Grey Pneumatic is a world supplier of impactsockets for the heavy duty,

Only two homes in the vicinity of the Hereford Township site exceeded the old threshold. With the new standard, the number requiring remediation rose to 13,This is a really pretty round stonemosaic votive that has been covered with vintage china . according to EPA officials, who will hold a public meeting on the new development today.

Experts said the airborne TCE is evaporating out of groundwater where TCE levels are 140,000 times the acceptable limit for drinking water. EPA measures the vapor levels from soils beneath homes likely to be affected.

The site's remedial project manager for vapor intrusion,Ekahau rtls is the only Wi-Fi based real time location system solution that operates on any brand or generation of Wi-Fi network. Mitch Cron, said that in most cases the ventilation system is a "very basic construction project" that involves cutting a hole in the basement floor and digging a ventilation pit.

Once the pit is filled with gravel, a pipe extending to the roofline is cemented in place. A fan inside that pipe draws the contaminated vapor from beneath the home and expels it into the air outside.

The mitigation systems will be installed at no cost, but residents will have to pay related electric costs of $5 to $15 per month.

"Many homeowners have water treatment systems, so I think residents understand the presence of the (Crossley Farm Superfund) site in their community," Cron said. "And I think they understand the threat to human health posed by vapor intrusion.You can create a beautiful chinamosaic birdhouse that will last for generations."

Officials first became aware of the environmental problem in the Huffs Church section of Hereford in 1983, when the state Department of Environmental Resources found that wells downhill from Crossley Farm were contaminated. Four years later, an EPA study identified the contaminant as TCE, an industrial solvent commonly used as a metal degreaser.

In 1998, the EPA uncovered the source: 1,200 drums of TCE-contaminated liquid waste that Bally Case and Cooler sent to have buried at the farm from the mid-1960s to the mid-1970s.

After the TCE seeped into the groundwater, the chemical spread in a plume that extends 3 miles south of the farm in an aquifer reaching depths of 500 feet.

According to the EPA website, TCE levels as high as 700,000 micrograms per liter have been measured in the groundwater; the standard TCE level for drinking water is 5 micrograms per liter.

Roy Schrock, remedial project manager for the EPA, has said that it could take 30 years to clean the groundwater, which is being pumped to the surface and decontaminated.