PROJECT: REMOVE & REPLACE UNDERGROUND STORAGE TANKS

Where: Rossville, Maryland 21237 - Baltimore County

Overview:
Removal of four underground storage tanks (USTs) and replace with two double-walled fiberglass USTs.

Four USTs were properly cleaned and removed under the supervision of an MDE-certified remover. The collected liquids/sludge and proper PPE/cleaning supplies were hauled off-site as non-hazardous waste a facility for proper disposal. There were no obvious perforations observed in the tanks during removal, however impacted soils were present. Final PID readings, once impacted soils were removed, were all below 10 ppm-v at approximately 15 feet below ground surface (bgs). During excavation, a total of 12 post-excavation soil samples were collected from the bottom of the excavation. An additional three post-excavation soil samples were collected from the three multi-sided dispensers. Impacted soils were excavated and stored on plastic and covered with plastic pending facility approval. Approximately 279.76 tons of impacted soils were removed to Soil Safe of Upper Marlboro.

After removal, the excavation area was cleared and shoring set-up for tank installation. Two 20,000-gallon USTs and five MPD were installed. The total project was completed in nine weeks.

Project Description:
• Removal of non-hazardous chemicals
• Conduct UST removal/installation site work
• Coordinating subcontractors (vendors, consultant, laboratory)
• Report preparation including sampling plans, HASP

Contract Highlights/Relevancy:
• HASP, sampling plans, soil samples
• UST investigation/removal/replacement
• Non-hazardous material characterization and removal/proper disposal