- Construction Date: September 2019 to January 2020
- Location: East Providence RI
- Category: Soil Remediation
Project Details: In September 2019 NSI was awarded a contract to install 450’ feet of retaining walls to permit excavation of coal tar contamination from a 100yr old manufacturing operation. 50’ sheets were installed along half the property boundary at former loading docks. Initial attempts at installation were halted to remove over 2000 tons of deep concrete foundations and piers buried at the site. In the end over 13,000 cu yds of contaminated soil were excavated and delivered to an out of state remedial site.
After the completion each sheet pair was pulled and steam cleaned to remove any vestigial tar contamination before leaving the site.