SECTION ONE
Introduction
Low levels of BTEX were detected in the lower aquifer (<0.5 g/L to 5.8 g/L). However, TCE,
DCE, VC, and PCE, while detected in the upper aquifer, were not detected in the lower aquifer.
Mn and iron were detected in both the upper and lower aquifers. The RI determined that the
elevated levels of Mn were caused by dissolution of manganese from geologic material.
Results of groundwater quality indicator parameters measured during the RI, including increased
specific conductance, dissolved metals and biochemical oxygen demand, indicated that low
levels of metals and inorganic compounds were leaching from the landfill into the upper aquifer.
However, the parameters were reported to rarely exceed five times their background levels.
There was no evidence of leaching to the lower aquifer.
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Ft. Griffey Landfill 5 OU Interim RA Report
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