Written by Carol Frank Friday, 17 September 2010 00:00
Last week many people took note of the fact that activity has begun on the site of the Exxon Mobil service station at the corner of Steamboat and Middle Neck Road. Kleinfelder, an engineering consulting firm with offices around the country, was hired by Exxon Mobil to do the actual work of de-commissioning the site and preparing it for sale. The project manager provided the Record with a fact sheet about the steps involved to assure that there is no contamination left on the property.
Be aware that this process is independent from the work to be done by Exxon Mobil to handle the gasoline spill that was discovered and which has seeped down to the aquifer and will require monitoring, mapping and clean-up.
The emptied tanks to be pulled up include three fiberglass gasoline tanks with capacities of 6,000, 8,000 and 10,000 gallons, and two fiberglass tanks which previously held fuel oil and used oil. The three hydraulic lifts in the service bays on site will also be removed.
Kleinfelder expects the removal of the tanks to take 30 days to complete.
These are the steps described in the fact sheet.
First, the tanks will be “degassed.” Although the liquid has been removed, the remaining vapors will be removed by vacuum trucks as a safety precaution. An excavator will remove the reinforced concrete pads covering the underground tanks. Then the excavator will “unearth” the tanks by removing the dirt and fill from around them.
Trucks will load the dirt, fill and debris for removal. The fiberglass tanks will be lifted out of the ground and loaded onto “roll-off”containers. At this point, the Nassau County Fire Marshal, who has the responsibility of inspecting all tanks at gas stations on a regular basis, will inspect the tanks. Then the tanks will be crushed. The crushed tanks will be hauled away to licensed disposal sites outside of Great Neck and will be treated as construction debris.
These tanks will undergo another inspection by the New York State Department of Environmental Conservation. The DEC will also inspect the site.
After the tanks are pulled, the excavated areas will be filled to grade. The fuel pumps will be removed, but the building and canopy will remain. At this point, the fencing will be removed, but chains and stanchions will be put in place to restrict vehicles from entering the site.
Exxon Mobil spokesperson Amy Blanchett says that the company wants the community to know that they intend to handle all aspects of the de-commissioning responsibly.