Southeast Rockford Groundwater Contamination Superfund Project: Source Area 11 Feasibility Study and Proposed Plan

              Source Area 11
Feasibility Study and Proposed Plan
Southeast Rockford Groundwater Contamination Superfund
Project
June 2001
Rockford, Illinois
What is Source Area 11? Source Area 11 is an
industrial/commercial 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, 11
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 11? The contaminants detected at Area 11 are
mainly chemicals found in oil and gasoline with lesser amounts of industrial solvents. Free product was
detected floating on the water table between 39 and 45 feet below ground surface. Most of the Area 11
chemicals are volatile organic compounds (VOCs). ?Organic? means the chemicals contain carbon and ?
volatile? means they vaporize (evaporate) easily. The enclosed "Remedial Investigation" fact sheet has
more information about Area 11 contamination.
What is the Source Area 11 proposed plan? For each source area, including Area 11, the Illinois
EPA and United States Environmental Protection Agency (U.S.EPA) propose one remedy for the
contaminated soil and a second remedy for the leachate. The agencies studied three alternatives for the
soil remedy in Source Area 11 (Table 1). Of these alternatives, the agencies propose soil vapor
extraction (SCS-11C). The agencies studied and propose one remedy (Table 2) for the leachate. The
leachate remedy is called the "No action" alternative but includes groundwater monitoring and
restrictions on use of the property. The public is invited to comment on all the 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 11 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 information
sources listed in 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.
Table 1
SOIL ALTERNATIVES
Source Area 11 Feasibility Study and Proposed Plan - Southeast Rockford Groundwater ... Page 1 of 6
http://www.epa.state.il.us/community-relations/fact-sheets/southeast-rockford/southeast-ro... 5/25/2012