ExxonMobil’s soil vapor treatment system is fully functional and proving highly effective in addressing soil vapor, which is found only in isolated locations in Greenpoint’s industrial/commercial area. Bi-annual sampling conducted last August showed soil vapor results well below target levels requiring action.
ExxonMobil has committed to continue its soil vapor sampling under the agreement signed with the State of New York.
The soil vapor extraction system, which began full-scale operation in June 2010, consists of seven wells connected via underground piping to a new treatment facility constructed at the intersection of Bridgewater and Varick Streets. The wells and piping were installed in 2009 in the subsurface above the underground petroleum plume. The treatment facility contains a process fan and furnace which together create a powerful vacuum that pulls the soil vapor at 2,200 cubic feet per second. Once within the furnace, the soil vapor is essentially “cooked” at 1400 degrees Fahrenheit which destroys the volatiles in the soil vapor.