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The Site is located at 12042 South Peoria Street, Cook County, Chicago, Illinois. The Site consists of a parcel of land approximately 5.2 acres in size, and is surrounded by industrial facilities and warehouses to the north and south, and vacant or abandoned lots to the east and west. No buildings currently exist on-site, although remnants of heavy machinery and processing equipment likely related to Site operations are present on the property.

Approximately 75% of the site is paved with concrete, 5% with asphalt, and the remaining land is not paved. The unpaved areas appear to be related to former railroad spurs that cross the property, and run in strips from north to south along the western edge of the property and extend to the southeast corner of the Site.

Most of the Site is either at ground surface or elevated by approximately four feet to loading dock level. One large pile of debris, consisting of refuse from Site demolition operations, rests in the southwest corner of the Site. The debris pile comprises approximately 800 cubic yards of material. Several underground storage tanks are still present in the western portion of the Site, beneath concrete pads adjoining the northwestern Site boundary and within a loading dock between railroad spurs in the western part of the Site. Site soils comprise approximately tow to four feet of artificial fill overlying the native olive green fine sand. A more detailed description of the Site and the surrounding properties is included in the SAP.

Historic land use at the Site has included the manufacture and refinement of white lead (i.e., lead carbonate) and lead oxide for lead-based paints and other lead-related products from 1906 until approximately 1980. According to Sanborn maps and historical aerial photographs, extensive building demolition occurred at the Site in the mid-1980s, with the final demolition of the Mill Building in 1996. Some structures were razed as early as the turn of the century.

Various other industrial activities have been conducted in the immediate vicinity of the Site, including an aluminum foundry, metal machining shops, vehicle and heavy equipment maintenance and storage, junkyards, coal yards, and other metal treatment, forging, finishing, and pickling operations. Sanborn maps, included in the SAP, show the specific locations of these operations. Although most of the properties surrounding the Site are currently abandoned or vacant, it is likely that historical activities at these facilities have influenced lead concentrations in soils in the Site vicinity.

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