Superfund Information Systems: Site Profile

Superfund Site:

U.S. SMELTER AND LEAD REFINERY, INC.
EAST CHICAGO, IN

Operable Units

During cleanup, a site can be divided into a number of distinct areas depending on its complexity. These areas, called operable units (OUs), may address geographic areas, specific problems, or areas where a specific action is required. Examples of typical operable units include construction of a groundwater pump and treatment system or construction of a cap over a landfill.

OU ID Name Types of Contaminants
Present at the Time of
ROD Completion
Cleanup Technologies Selected
in the Decision Document
00 SITEWIDE
01 ZONES 1, 2, & 3
  • ARSENIC
  • LEAD
  • Disposal (offsite)
  • Engineering Control (other, NOS)
  • Excavation
  • Institutional Controls
02 GROUNDWATER
04 Z2&3 ASAOC RESPONSE WORK

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