Superfund Information Systems: Site Profile

Superfund Site:

ST. REGIS PAPER CO.
CASS LAKE, MN

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 NW AREA
02 SW AREA
03 CASS LAKE CITY DUMP
  • CARCINOGENIC POLYCYCLIC AROMATIC HYDROCARBONS (cPAH)
  • PENTACHLOROPHENOL
  • POLYCYCLIC AROMATIC HYDROCARBONS (PAHS)
  • Discharge (surface water/NPDES discharge)
  • Filtration (P&T, exsitu)
  • Hydraulic Control (containment)
  • Monitoring
  • Treatment (other, NOS, exsitu, onsite)
04 NRT COORDINATION
05 SACA GRANT
06 REMOVAL
07 HOUSE DUST
  • ARSENIC
  • BENZO[A]PYRENE EQUIVALENTS (BaPEq)
  • POLYCYCLIC AROMATIC HYDROCARBONS (PAHS)
  • Dust Suppression
  • Physical Separation (exsitu, onsite)
08 SOILS
09 FOX CREEK
10 GROUNDWATER
11 OU11
12 SEMS
  • METALS
  • PAH
  • PENTACHLOROPHENOL
  • Cap (engineered cap)
  • Carbon Adsorption (liquid phase, P&T, exsitu)
  • Excavation
  • Extraction (recovery/vertical well)
  • Monitoring
  • Operations & Maintenance (O&M)
  • Water Supply (permanent replacement, other, NOS)

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