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' 11 September 2001 AGE-NC Project No. 98-0466 ' Page 12 of 24 ' same boring can be utilized to assess ground water for chemicals of concern potentially released from the burn pits and soil stockpiles, as will be discussed below. ' 3.5.2. South and Cental Storm Water Basins t The central and southern storm water basins were utilized to collect plant runoff and occasionally were used as burn pits for wood waste.Review of documents provided to AGE did not indicate that any assessment of these features has been performed or is warranted. As no potential sources of ' contaminants have been identified for the two more southernly ponds other than occasional burning, AGE does not propose to assess the central and south storm ponds pendir g ground water assessment results from the burn pit and northern storm water pond areas,which would seem to be more likely ' to be impacted due to the more extensive burning history and open pits in the area. ' 3.6. BURN PITS AND FORMER TEEPEE STRUCTURE INCINERATOR ' Waste wood and trash were disposed on-site in two open burn pits west of the storm water pond from the 1960s to the late 1970s, and in a metal teepee incinerator souti of the former cover plant building and north of the former box factory building on the west side of{{he railroad track traversing ' the property. The bum pits were backfilled circa 1984 and were subsequently re-excavated circa 1994. Soil excavated from the burn pits and former teepee area is stockpiled on the site north and east of the northern burn pit. 3.6.1. Burn Pits and Former Teepee Area Assessment Status ' Laboratory analysis of soil samples collected from the burn pits an teepee structure area by Kleinfelder revealed localized elevated concentrations of metals (copper, lead and zinc) compared ' to background concentrations and low concentrations of chlorinated hydrocarbons(DCMA,PCE and TCE).The concentrations encountered,while locally elevated for some analytes,have generally been below levels of environmental concern.Locations of the bumpits and tepee structure are shown on Figure 2. With the exception of soil sample 63599(a soil sample from the fill in the north pit)among samples ' collected in 1992, metals concentrations ranged as follows: • Nickel - <10 milligrams per kilogram (mg/kg)to 30 mg/kg; ' • Copper- 29 to 220 mg/kg; • Lead - <5 to 180 mg/kg; Advanced GeoEnvironmental,lnc. 1