TPH Criteria Working Group Demonstration Field Sampling Report: Robins Air Force Base Warner-Robins GA
Interim rept. Jan 1999-Jan 2000
OPERATIONAL TECHNOLOGIES CORP DAYTON OH
Pagination or Media Count:
Underground storage tank Site 70, Robins Air Force Base, Georgia, is part of a large aircraft refuelingdefueling hydrant system. Site 70 was impacted by JP-4 and JP-8 jet fuels through spill, overflows and leaks dating back many years. This total pertoleum hydrocarbon TPH containmation has been identified and interim corrective action applied to remove free product from above the shallow groundwater table. Using limited site data and the Total Petroleum Hydrocarbon Criteria Working Group TPHCWG or Working Group approach for evaluation of weathered fuel spills, a Tier 1 Risk-Based Corrective Action RBCA analysis demonstration was performed. Soils from the site were analyzed using the Direct Method recommended by the Working Group to characterize the fuel residuals present in terms of 13 total petroleum hydrocarbon TPH fractions. The TPH contamination present was composed predominantly of aliphatic equivalent carbon EC fractions EC8 to ECi6 with some EClO to ECi6 aromatics. The lowest average risk-based screening level RBSL calculated for the current commercial use scenario was approximately 9000 mgikg for the direct soil to skin contact pathway. For a futuristic residential scenario, the lowest average RBSL was about 3000 mgikg for the contaminant leaching to groundwater pathway. This demonstration, however, does not represent a complete site assessment as only soil contamination pathways were evaluated.
- Organic Chemistry
- Hydrology, Limnology and Potamology
- Fluid Mechanics