CONDITIONS IN DICK'S CREEK AND A LANDFILL TRIBUTARY ADJACENT TO AK STEEL MAY PRESENT AN IMMINENT AND SUBSTANTIAL ENDANGER MENT TO HUMAN HEALTH AND THE ENVIRONMENT DUE TO THE DOCU- MENTED PRESENCE OF PCBS AND PCBS EXCEEDING CONSERVATIVE RISK BASED SCREENING LEVELS AND HEALTH GUIDELINES. AK STEEL MUST PREVENT EXPOSURE OF UNAUTHORIZED PERSONS TO THE CREEK SEDI- MENTS/SURFACE WATERS, INVESTIGATE THE FULL NATURE AND EXTENT OF THE CONTAMINATION, CONDUCT INSPECTIONS ALONG THE CREEK, REDUCE USAGE OF WATER IN ITS SLAG PROCESSING AREA, AND PRO- POSE AND IMPLEMENT REMEDIAL ACTIONS TO ELIMINATE THE RISKS.