NCCI Massachusetts Department of Correction facility UST Removal and AST Install

NCCI Massachusetts Department of Correction facility UST Removal and AST Install

CommTank was hired by Constellation Energy Resources, LLC to remove three (3) 30,000-gallon underground storage tanks (USTs) and associated outside piping containing No. 2 fuel oil and to install a double wall aboveground storage tank (AST) at the NCCI Massachusetts Department of Correction facility in Gardner, Ma. We had previously been hired to clean these underground tanks in preparation for converting from #6 fuel oil to #2 fuel oil but our crews found significant corrosion on the tank bottoms. Because of this corrosion we recommended removing the underground tanks and replacing them with a single aboveground diesel storage tank.

Project Set Up

  • Provided a site-specific health & safety plan
  • Created an AutoCAD drawing detailing the upgrade of the system
  • Submitted the installation plans to the Gardner Fire Department for approval

Tank Removals

  • Obtained necessary permits (tank removal permit, trench permit, etc.)
  • Provided DigSafe utility clearance of property (identify underground utilities)
  • Prepared a site-specific health and safety plan
  • Saw cut and removed concrete pad located on top of the USTs
  • Excavated soil located on top of the USTs
  • Created a manway into the one of the USTs
  • Removed all pumpable contents and tank bottoms
  • Measured explosive gases using a 4-gas meter
  • Entered and cleaned the inside of one of the USTs
  • Removed and prepared USTs for fire department inspection
  • Field screened soil using an organic vapor meter (OVM)
  • Submitted three (3) soil samples to a state-certified laboratory for Extractable Petroleum Hydrocarbon (EPH) analysis
  • Filled and compacted excavation to surrounding grade with clean fill (sand and stone)
  • Transported and disposed of the USTs at a licensed tank yard
  • Provided customer with UST closure reports
  • Submitted an FP-290R to the local fire department and the Massachusetts Department of Environmental Protection

Completed aboveground tank installation at NCCI

Concrete Restoration

  • Restored approximately 4,000 square feet of previously removed concrete using 5,000 PSI steel reinforced concrete Tank Installation
  • Pre-inspected all equipment and materials (including a pre-installation pressure test)
  • Installed one 12” thick steel reinforced concrete pad per 310 CMR 1
  • Installed customer provided railing system
  • Provided and installed one new 10,000-gallon UL-142 Double-Wall Steel AST with a white urethane exterior coating
  • Provided and installed tank supports and anchorage devices
  • Provided and installed spill and overfill prevention measures sufficient to fulfill the requirements of 527 CMR 9.00
  • Provided and installed new aboveground fuel suction and return lines from the new AST to the existing pipes inside the building
  • Provided and installed necessary bracketing and supports for the piping installed in between the new AST and the existing pipes in the building
  • Provided and installed a new Morrison Bros. fuel level gauge
  • Provided and installed a new interstitial space mechanical gauge
  • Provided and installed one (1) 15-gallon remote spill overfill containment
  • Installed one (1) Preferred Utility probe that was removed from one of the existing UST’s
  • Provided and installed a new vent alarm with a 2” schedule 40 steel vent risers and an approved vent cap. The vent riser terminated 12’ above grade.
  • Provided and installed an emergency relief vent on the primary and secondary containment of the AST
  • Installed ten (10) 6” steel bollards around the AST including a 3’ deep x 3’ wide footing
Tank Testing

The new tank was pressurized to 4 pounds per square inch (PSI) for more than one hour. Vacuum pressure of 15 PSI was applied to the secondary containment of the new AST for a 24-hour period. The product supply lines were pressurized at 50 PSI for over a 24-hour period. After placing fuel in the tank, satisfactory operation of the monitoring system was ensured before the system was placed into operation. Satisfactory operation of the secondary containment system, overfill prevention devices and line leak detectors were also tested. Upon project completion the AST was tested and left ready for operation.

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