Southeast Rockford Groundwater Contamination Superfund Project: Source Area 9/10 Feasibility Study and Proposed Plan

              Source Area 9/10
Feasibility Study And Proposed Plan
Southeast Rockford Groundwater Contamination Superfund
Project
June 2001
Rockford, Illinois
What is Source Area 9/10? Source Area 9/10 is an
industrial area in southeast Rockford shown on the map
below. When the project began, the sources of
groundwater contamination in southeast Rockford were
unknown. In the Phase I project investigation, the
Illinois Environmental Protection Agency (Illinois EPA)
identified 14 study areas as possible sources of
contamination. After several years of study, the Illinois
EPA identified four of these study areas (Areas 4, 7,
9/10 and 11) as the major sources of groundwater
contamination in this project. These study areas,
therefore, were renamed Source Areas 4, 7, 9/10 and
11.
What are the main contaminants at Source Area 9/10? The contaminants at Area 9/10 are mainly
industrial solvents with lesser concentrations of chemicals found in oil and gasoline. Most of the solvents
are in a class of chemicals called volatile organic compounds (VOCs). "Organic" means the chemicals
contain carbon and "volatile" means they evaporate easily. Almost all the solvents are found beneath
ground surface. The enclosed "Remedial Investigation" fact sheet has more information about Area 9/10
contamination.
What is the Source Area 9/10 proposed plan? For each source area, the Illinois EPA and the United
States Environmental Protection Agency (U.S.EPA) designated one soil remedy and one leachate
remedy as the proposed plan. The agencies studied three alternative soil remedies (Table 1) and five
alternative leachate remedies (Table 2) for Area 9/10. Of these alternatives, the agencies propose soil
vapor extraction (alternative SCS-9/10C) for the soil and the reactive barrier wall system (alternative
SCL-9/10D) for the leachate. The public is invited to comment on all alternatives.
Italicized words are discussed in the "Terms" section at the end of the page.
Purpose of this fact sheet
This fact sheet describes the feasibility study
(alternative remedies) and the proposed plan for Source
Area 9/10 of the Southeast Rockford Groundwater
Contamination Superfund project. Fact sheets describing
the alternatives and proposed plans for the other three
major source areas are available from the information
sources listed on the back of this fact sheet. A
groundwater remedy, focusing on all the project area
groundwater predicted to be affected by contamination
in the next 65 years, was chosen in 1995. The
groundwater remedy is described below.
Source Area 9/10 Feasibility Study And Proposed Plan - Southeast Rockford Groundwate... Page 1 of 7
http://www.epa.state.il.us/community-relations/fact-sheets/southeast-rockford/southeast-ro... 5/25/2012