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Page 13 500.3.2 Existing (pre-construction) Control Measures Figure 3 illustrates an existing (pre-construction) control measure encountered within the project site: TIP, - � Fiqure 3 The site entrance has an improved surface, compacted base roadway, covered with 1" minus aggregate. It is designed to handle large trucks and heavy construction equipment. It should be noted, that although this appears to be a "track-out" BMP, the Royster facility is remotely located and one must travel in excess of a mile on a gravel road in order to reach the nearest public street. 500.3.3 Nature of Fill Material & Existing Data Describing the Soil Soils at the site are classified as aggregate that ranges in size from pea gravel down to fine sand. There is little moisture in the soil and it rapidly soaks water at the surface. The construction site is partially covered by burn ash that was the result of a large tire fire that swept through the property. There are 34 piles of burn ash in total, each containing high levels of zinc and pyrolytic oil. The zinc was a product used in the steel belting found in radial tires, and the pyrolytic oil oozed from the rubber compounds as they burned. Although the zinc does not present a toxic hazard, it is classified as a "heavy metal" in CCR 22. Zinc is a soluble metal that can leach into ground waters below the surface. The primary aspect of the job is to excavate the burn ash and remove it from the site. The levels of pyrolytic oil will be sampled and analyzed to determine specific hazards, if any prior to excavations. There is also an area suspected to contain heavy concentrations of lead. Lab analysis will indicate the types and levels of actual contamination in this soil. Contaminated soils will be excavated and removed from the site. Necessary precautions will be taken in order to protect workers from the toxic hazard, to include "supplied air" where required. Prepared: April 12, 2003