SOUTH TACOMA FELD OPERABLE UNIT OF THE COMMENCEMENT BAY SOUTH TACOMA CHANNEL SUPERFUND SITE, IS LOCATED IN TACOMA, PIERCE COUNTY, WASHINGTON AND WAS LISTED ON THE NPL IN 1983. A RI/FS WAS COMPLETED AND A ROD ISSUED. PRPS, INCLUDING OWNERS, OPERATORS, AND GENERATORS, HAVE BEEN IDENTIFIED. MAJOR CONTAMINANTS OF CONCERN IDENTIFIED BY THE RI IN THE GROUND WATER INCLUDE BENEZENE, TOLUENE, ETHYL BENZENE, XYLENES, AND 1,1,2 TRICHLOROETHANE. THIS CONTAMINATION HAS NOT MIGRATED OFF-SITE. MAJOR CONTAMINANTS OF CONCERN IN THE SOIL INCLUDE HEAVY METALS (INCLUDING LEAD, ARSENIC, AND CADMIUM), POLYNUCLEAR AROMATIC HYDROCARBONS (PAHS) AND POLYCHLORINATED BIPHENYLS (PCBS). RISKS AT THE SITE ARE DRIVEN PRIMARILY BY EXPOSURE TO ARSENIC. COSTS OF CLEANUP ARE DRIVEN PRIMARILY BY LEAD. REGION 10 IS SEEKING TO ENGAGE IN SETTLEMENT NEGOTIATIONS WITH THE PRPS FOR IMPLEMENTATION OF THE RD/RA.