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No Further Action Request Section b 0ZItb/2006 <br /> Former American Forest Products Facility Page 6-2 <br /> URS Project No 17322736 g <br /> for usable water resources to the area must be considered to determining what period of time is <br /> reasonable to reach non-detectable (or background) concentrates <br /> Risk assessments and well surveys for the site indicate that there is no risk to human health and <br /> safety from the low contaminant concentrations in site groundwater <br /> 6 The plume size is stable and sufficiently limited in lateral and vertical extent and contaminant <br /> concentrations detected to groundwater show a decreasing trend with time One hydrologic cycle <br /> (four quarters) of monitoring after active remediation measures have ceased is usually <br /> considered to be the minimum necessary to determine site groundwater and plume conditions <br /> Based on the additional groundwater assessment conducted during 2005, a downgradient "non- <br /> I <br /> detect" line has been established for the site Quarterly analytical data show a decreasing trend for <br /> 1,2-DCA concentrations in all wells in which the constituent has been detected <br /> I <br /> lie <br /> L 11ProjeLts\URS\AFP12005 DCA Investigation\][P investigation ReportlAFP 2005 Report WP-TF-Rev02 doc <br />