Still reeling from a disaster it created at a Colorado gold mine, the EPA has so far avoided criticism for a similar toxic waste spill in Georgia. In Greensboro, EPA-funded contractors grading a toxic 19th-century cotton mill site struck a water main, sending the deadly sediment into a nearby creek. Though that accident took place five months ago, the hazard continues ... The sediment flows carry dangerous mercury, lead, arsenic and chromium downstream to the Lake Oconee and then to Oconee River — home to many federally and state protected species. Lead in the soil is 20,000 times higher than...