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Site Description <br /> investigations of the ADCs were performed by AGE in 2000 and 2001 and az discussed in further detail <br /> in Section 4.0 as part of the AOC specific Workplans. <br /> Review of the above documents and a site visit conducted on February 17,20 5 by Gary Lieberman and <br /> Larry Froebe of MACTEC identified the following areas where previous inve ligations have been <br /> completed and/or are considered potential environmental concerns at the Site: <br /> • Fifteen former UST locations used for the storage of hazardous materials nd wastes <br /> • Historic use and storage of PCP,a wood preservative at two sites. The tm o sites are referred to in this <br /> document as the Parking Area and the Former Penta Tank <br /> • Two areas utilized for,and potentially impacted by, steam cleaning opera 'ons where runoff flowed <br /> into a drainage ditch. The two steam cleaning areas are referred to in this document as Former Steam <br /> Clean Areas-South(SCAT)and—North(SCA2). The drainage ditch is i eferred to in this document <br /> as the West Drainage Ditch <br /> • Six septic tanks that potentially received hazardous materials <br /> • Five wash-down areas that potentially introduced hazardous materials to he soil <br /> • Three stormwater retention basins that may have received hazardous mat rials in runoff <br /> • Two former bum pits and a former teepee structure incinerator <br /> • The transformers thought to contain Polychlorinated biphenyls(PCBs) <br /> • An asphalt rubble area in the northeast portion of the Site <br /> • The potential presence of VOCs and formaldehyde in soil gas. <br /> Draft <br /> KB61125 workplan-ESC MACTEC Engineering and Consulting, Inc. 9 <br /> September 28,2005 <br />