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Reaion 7

Fact Sheet

155|d. ?

Iowa
Kansas





Missouri
Nebraska

November 2004

EPA Providing Alternate Water Supply

Parkview Well Site, Grand Island, Nebraska

INTRODUCTION

The U.S. Environmental Protection
Agency (EPA) Region 7, in coordination
with the Nebraska Department of
Environmental Quality (NDEQ), has
conducted additional characterization
activities at the Parkview Well
Superfund Site in Grand Island. This
work included sampling of ground water
and several residential wells previously
found to contain volatile organic
compounds (VOCs) at concentrations
above health based levels of concern.

Based on this information, EPA will
provide alternate water supplies to
several households with private drinking
water wells affected by the ground water
contaminants related to the site.

SITE BACKGROUND

The Parkview Well site is located near
the southwest corner of the city of
Grand Island (the City) in Hall County,
Nebraska. Investigations have identified
what appears to be two areas of
contamination, including a north and
south plume of ground water
contamination. The northern plume
extends from the Case New Holland
(CNH) property (an agricultural combine
manufacturer) east toward the Parkview
subdivision. The southern plume
extends from a golf course west of the
Marylane, Kentish Hills, and Castle
Estates subdivisions to the east where it
commingles with the northern plume

under the Parkview subdivision. EPA is
trying to determine the source(s) of these
two plumes of contamination and how the
contamination is impacting the area near
the Parkview subdivision.

In 1999, routine monitoring first detected
VOCs in municipal well PWSW-4. In
August 2001, analysis of ground water
from PWSW-4 detected VOCs at
concentrations exceeding health-based
levels. In 2001 and 2002, sampling by the
City identified similar VOCs in several
private drinking water wells around the
Parkview subdivision. This municipal well
and numerous domestic wells have been
closed due to the contamination. Ground
water in this area moves in an easterly
direction, and ground water contamination
is likely migrating in that direction.

In the fall of 2002, CNH conducted an
investigation of soil and ground water at
impacted areas on their property.
Analytical results from this investigation
indicated significantly elevated levels of
VOCs in soil and ground water.

In the summer and fall of 2003, the EPA,
state, city, county and CNH conducted
additional investigations and confirmed
that several private drinking water wells at
the Parkview, Marylane, Kentish Hills, and
Castle Estates subdivisions were
contaminated with VOCs, some above
drinking water standards. Over seventy
private drinking water wells were found to
contain ground water contaminated with
VOCs at levels exceeding health based

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levels. Based on this information, CNH
agreed to provide an alternate water
supply to the affected residents.

The VOCs detected during these
investigations included:
tetrachloroethylene (PCE);
trichloroethylene (TCE); 1,1- and cis-
1,2-dichloroethylene (DCE); 1,1-and
1,2-dichloroethane (DCA); and 1,1,1-
trichloroethane (TCA).

CURRENT ACTIONS

EPA conducted further follow-up
investigations in August 2004, including
collecting samples of ground water and
indoor air. EPA confirmed that several
private wells contained PCE at levels of
concern. For those residences affected,
EPA is working with the city, state, and
the homeowner to determine the best
strategy for preventing exposure to the
contamination.

At this time, EPA is planning to connect
six homes to the city water supply.

These homes will be offered bottled
water until this connection is complete.
EPA may conduct additional sampling of
wells threatened by contamination.

EPA, in consultation with the Nebraska
Department of Health and Human
Services System, has evaluated the risk
to individuals who are drinking
contaminated water from the site. EPA
has determined that there are certain
levels of contamination in the ground
water that may pose an unacceptable
health risk to these individuals. If levels
of contamination in a person's private
drinking water well are more than 5
micrograms per liter (ug/l) of PCE or 261
ug/l of DCE, then EPA will provide an
alternate water supply to that residence
until it can be connected to the
municipal water supply.

FUTURE STEPS

The Parkview Well site was proposed for
listing on the National Priorities List, on
NPL, in September 2004. As a next step
to this proposed listing, a study called a
remedial investigation will be performed to
define the extent of the contamination.

This investigation will rely to a great
degree on the previously collected
information and supplement that
information where data gaps exist,
including additional sampling of wells
threatened by contamination. EPA is also
investigating the possible source(s) of
contamination.

After the remedial investigation is
complete, a feasibility study will be
prepared to evaluate different alternatives
to clean up the contamination at the site.
EPA will ultimately present this information
to the community and ask for comments
on EPA's proposed actions before making
a decision regarding the cleanup. During
this process EPA will continue to evaluate
the need for interim actions to protect the
public drinking water supply.

FOR MORE INFORMATION

For more information on this Fact Sheet or
the Site, please contact:

Beckie Himes

Community Involvement Coordinator
U.S. EPA
901 N. 5th Street
Kansas City, Kansas 66101
Phone: 913/551-7003 or
Toll free: 1-800-223-0425
himes.beckie@epa.gov

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