Confirmation sampling in the bottom of the excavated areas still found
chemicals present. Additional excavation down to the water table is
scheduled for these contaminated areas.
The N Street ditch next to the toxaphene plant is being excavated and a
revetment lining installed. Water sampling is being conducted during
removal activities in the toxaphene plant and N Street areas to monitor
for chemical releases to the estuary and St. Simons Sound.
Toxaphene, a chlorinated camphene pesticide, was manufactured at the
Hercules Brunswick Plant from 1948 to 1980. The pesticide was banned
world wide under the Stockholm Convention and is commonly known as one of
the "toxic twelve" or "dirty dozen" chemicals. Due to toxaphene's long
life and ability to readily transport through the environment and far from
where it was used is being found world-wide. Higher levels are commonly
found in northern latitudes and in Arctic animals.
The GA-EPD calls the toxaphene plant Solid Waste Management Unit #5, or
SWMU #5 for short. It is one of 39 identified toxic waste sites on
the Hercules Plant. Removal of SWMU #5 will be followed by investigations
and plans for the remaining 38 hazardous areas.