NYSEG plans for remediation at former manufactured gas plant
NORWICH – Work is expected to begin next week at the former NYSEG Manufactured Gas Plant site, located at 24 Birdsall St. in Norwich.
Last week, notification was sent out to local officials that New York State Electric and Gas and its consultant, AECOM Environmental will begin sampling field work at the former MGP site in order to begin remediation work.
According to information on file at Guernsey Memorial Library, the MGP site was first used for manufacturing gas sometime between 1863 and 1887. During that time, oil, coal and coke were used at various times as feed fuels for the coal gasification. By 1953, gas was no longer produced at the site, however soil tests have shown evidence of coal tar or NAPL at the site and on off-site property to the south.
Although some remedial action has already been taken, the final study, compiled in March of 2008, found a need for further steps to be taken. In 1997, remediation included the excavation of 11,500 tons of soil. In addition, in 1999 and 2000, soil vapor extraction and air sparging systems were installed in the area, however those systems were shut down in June of 2003.
In 2006, it was discovered that shallow groundwater had been impacted by the soil constituents, which include volatile organic compounds, and semivolatile organic compounds.
To address those issues, NYSEG and AECOM Environmental are developing a plan to use in-situ stabilization of the soils at the site. The Department of Environmental Conservation announced in their final study that in-situ stabilization would be the most appropriate response to the issue.
The plan calls for the in-place treatment of on-site soils. “In-situ stabilization involves mixing a binding agent in the form of a slurry into the subsurface soil,” an announcement from NYSEG explains. The process would basically require a cement-like material to be mixed with the soil at the site to a depth of approximately 24 feet. Approximately 52,200 square feet of property would be treated. The removal of 6 feet of soil would be required because of the additional material added to the soil.
Before that work can begin, further testing is required. “We are now ready to conduct field work that will determine the appropriate in-situ stabilization formulation to meet the requirements established by the DEC,” the NYSEG statement explained. Beginning next week, a series of soil borings will be conducted at the site. Two drilling rigs will be used and air quality will be monitored during the process. The tests are expected to last for five or six days. Actual remediation is expected to begin in the early part of 2010.
More information on the history of the site and the contaminants is available at Guernsey Memorial Library.
Last week, notification was sent out to local officials that New York State Electric and Gas and its consultant, AECOM Environmental will begin sampling field work at the former MGP site in order to begin remediation work.
According to information on file at Guernsey Memorial Library, the MGP site was first used for manufacturing gas sometime between 1863 and 1887. During that time, oil, coal and coke were used at various times as feed fuels for the coal gasification. By 1953, gas was no longer produced at the site, however soil tests have shown evidence of coal tar or NAPL at the site and on off-site property to the south.
Although some remedial action has already been taken, the final study, compiled in March of 2008, found a need for further steps to be taken. In 1997, remediation included the excavation of 11,500 tons of soil. In addition, in 1999 and 2000, soil vapor extraction and air sparging systems were installed in the area, however those systems were shut down in June of 2003.
In 2006, it was discovered that shallow groundwater had been impacted by the soil constituents, which include volatile organic compounds, and semivolatile organic compounds.
To address those issues, NYSEG and AECOM Environmental are developing a plan to use in-situ stabilization of the soils at the site. The Department of Environmental Conservation announced in their final study that in-situ stabilization would be the most appropriate response to the issue.
The plan calls for the in-place treatment of on-site soils. “In-situ stabilization involves mixing a binding agent in the form of a slurry into the subsurface soil,” an announcement from NYSEG explains. The process would basically require a cement-like material to be mixed with the soil at the site to a depth of approximately 24 feet. Approximately 52,200 square feet of property would be treated. The removal of 6 feet of soil would be required because of the additional material added to the soil.
Before that work can begin, further testing is required. “We are now ready to conduct field work that will determine the appropriate in-situ stabilization formulation to meet the requirements established by the DEC,” the NYSEG statement explained. Beginning next week, a series of soil borings will be conducted at the site. Two drilling rigs will be used and air quality will be monitored during the process. The tests are expected to last for five or six days. Actual remediation is expected to begin in the early part of 2010.
More information on the history of the site and the contaminants is available at Guernsey Memorial Library.
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