Groundwater and soil sampling to determine the extent of hydrocarbon impacts, remediation and site closure at an active trucking facility where three underground storage tanks were removed between 1986 and 1996.
Removal of tanks
Site investigation, sampling soil and groundwater
Sub-surface site survey
The site is an active Roadway Express trucking facility where three underground storage tanks (UST) were removed between 1986 and 1996. Two additional USTs were located in 1986 and abandoned in place with concrete slurry. Burns & McDonnell reviewed the existing site information and worked with a potential buyer of the property to develop a scope of work to sample soil and groundwater in the area of the USTs. This investigation found impacts to the groundwater in the central-eastern and western portions of the site.
A follow-up investigation was performed with a more complete scope of work that extended borings outside of the property. This investigation was able to prove that impacts were predominantly to the groundwater zone above the Bay Mud clay layer at 10-12 feet below the ground surface. Additionally, it was determined that the pea gravel used for backfill from the previous UST removals was acting as a reservoir for the shallow groundwater zone.
A remedial action plan was implemented for the removal of the pea gravel and backfilling with clean compacted fill. The USTs that were historically abandoned in place were removed. Impacted hydrocarbon soil and backfill was removed and hauled off-site. The property was successfully sold and transferred to a new owner in 2011. In 2014, when the local regulatory agency was unyielding about concurring with site closure, Burns & McDonnell successfully negotiated and obtained a low-threat closure concurrence.
The client drew upon the Burns & McDonnell team's deep understanding of federal and state environmental laws, regulations and protocols, as well as the support of highly qualified staff. At present the site is undergoing a public comment period and is expected to close at the end of 2014.