A release from a No. 2 fuel oil storage tank resulted in contamination both in front and beneath a residential structure. The demolition based proposal would result in a long term displacement of an elder couple in their 90s; therefore an alternative remedial approach was sought.
Based on the project constraints, E&LP developed and implemented an alternative approach, which allowed for the occupants to stay in their residence. In addition, by using a “treatment train” remedial strategy, the actual costs of remediation were less than the proposed demolition approach. The treatment train consisted of a combination of technologies to allow for rapid remediation of the subject property with minimal disruption to its occupants.
The first phase of remediation consisted of removing the most contaminated and readily accessible soils that were beneath the former location of the tank. Given the depth of the impact, which extended below the foundation, structural mini-piles and wood lagging was used to preserve the structural integrity of the building.
As shown to the left, horizontal pipes were driven through the wood lagging and below the foundation to provide distribution of a persulfate-based, chemical oxidation injection to remediate the soils underlying the house.
Based on the combined efficiency of soil removal coupled with chemical oxidation of the more difficult to access contaminated soils, post remediation soil sample results confirmed remediation to NJDEP remediation standards.
Key Project Information
Client: Brennan Environmental
Location: Teaneck, NJ