UST Replacement
Boston College, Chestnut Hill, MA
Boston Environmental was contracted by Boston College to replace an existing concrete 50,000 gallon #6 heating oil tank located on the school’s Chestnut Hill Campus. It was to be replaced with a new tank system consisting of two 25,000 gallon, double wall steel STI-P3 tanks and associated appurtenances including, but not limited to, a new double wall packaged piping system, an electronic tank monitoring system, all required valves and fittings and the site work required to achieve a complete and operational heating oil system.
Prior to beginning the project, Boston Environmental obtained all necessary removal and installation permits from the city of Newton, MA, as well as Dig-Safe clearance and coordination to determine the exact location of the in-house utilities located within the construction area. In addition, Boston Environmental provided Boston College with a detailed construction schedule indicating major milestones.
The scope of preparation and removal activities for the existing tank included: pumping out of nearly 10,000 gallons of oil residue; industrial cleaning of the tank’s interior floor, walls and ceiling; manifestation, transportation and proper disposal of residual solids to a licensed facility; removal of all appurtenances including suction and return piping, heating coils and miscellaneous piping; and removal of existing concrete ceiling, wall and floor for disposal at an approved recycling facility.
New tank system installation-related activities included: excavation and removal of all soil, rock, and any remaining concrete and/or rebar hindrances to facilitate the installation; shoring to maintain a safe work environment per OSHA requirements, supply and install all required equipment and appurtenances for a complete system per the manufacturer’s instructions and the requirements of the Commonwealth of MA Fire Prevention Regulations.
Once the tank system was installed, Boston Environmental’s finish requirements included: backfill to subgrade using the same thick sand or washed stone used in the tank bed; installation of an 8” thick steel reinforced concrete grade mat; tank tightness and piping system testing results; and restoration of all disturbed asphalt.
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