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Brownfield Remediation: Former Union 76 Station

Pollack Shores Real Estate Group creates value by acquiring, developing, managing and investing in multifamily communities across the Southeast. In addition, they raise and manage funds for direct investment in real estate. Founded in 2006, the privately-owned firm’s team has grown a portfolio of roughly $1 billion in assets.

CLIENT INFORMATION

  • Client Since: 2010
  • Location: Atlanta, Georgia
  • Industry Sector: Developer / Realtor

PROJECT INFORMATION

  • Status: Completed

OPPORTUNITY

Rapidly remove light, non-aqueous-phase liquid (LNAPL), presumably waste oil and/or hydraulic oil, from the subsurface at a former fuel service station in preparation for site redevelopment under the Florida Brownfields Program.

SOLUTION

  • Installed 13 piezometers to accurately define limits of free product and obtain groundwater quality data prior to excavation.
  • Stripped approximately 2,000 cubic yards of clean overburden to a depth of 11 feet below land surface (bls).
  • Excavated contaminated soils from capillary fringe (11-13 ft bls) and from saturated zone (13-15 ft bls).
  • Allowed saturated soils to drain into excavation before stockpiling.
  • Pumped water and free product from excavation via vacuum truck.
  • Tested soils along excavation perimeter, as well as water within excavation, to determine completeness of remediation.
  • Backfilled with crushed (#57) rock – using filter fabric to prevent ravelling – below water table; balance of excavation backfilled with combination of imported fill and stockpiled clean overburden.
  • Waste oil underground storage tank (UST) discovered beneath former building footprint during excavation.
  • Install air sparging (AS) and soil vapor extraction (SVE) wells to remove contaminatants dissovled in groundwater.


SUCCESS

  • Approximately 15,000 gallons of water and free product pumped from excavation.
  • Over 400 tons of contaminated soil – exhibiting corrected organic vapor concentrations in excess of one part per million – and entrained free product removed from subsurface.
  • Contaminated soil and pit water transported to approved facilities for treatment and/or disposal.
  • AS and SVE systems plumbed using high-pressure, quick-connect hoses for maximum system flexibility and minimum installation cost.