Objective: Remediate a #2 fuel oil release located in a confined area between Winslow Hall's foundation and a retaining wall.
Result: The release site met cleanup standards within six months and was closed without a deed restriction. Neither Winslow Hall nor the retaining wall was adversely impacted.
While removing an underground oil storage tank, contactors discovered #2 fuel oil leaking from a 10,000 gallon underground storage tank (UST) located between Winslow Hall, a multi-story brick building with a full basement, and a 30-40 ft. terraced retaining wall. Treatement of petroleum-contaminated soil in the tank excavation was required due concerns about vapor intrusion into the building. Norfolk Ram Group (dba Norfolk Environmental) was contacted when structural concerns for Winslow Hall and limited access for large equipment prohibited continued excavation of contaminated soils. After analyzing site conditions, Norfok engineers designed a treatment plan for an In-situ Chemical Oxidation (ISCO) delivery system that applied ISCO treatments through a system of twenty-four injection wells. Follow-up monitoring confirmed that soil cleanup standards had been met and the site was closed within six moths via a Massachusetts Class A-2 response Action Outcome (RAO) submittal to regulators. The project was completed on time and on budget in the midst of construction activites related to the renovation of Winslow Hall. Appropriate safety protocols were implemented to ensure that class schedules were not disrupted while the work was preformed. The ISCO remediation was implemented in concert with renovation activities and did not affect the critical path schedule for completion of the renovations.