EPA Region 7	07/23/2008

City: Republic, MO

County: Greene County

Other Names: Republic Plant, SSC

SITE DESCRIPTION

The Solid State Circuits, Inc. (SSC) site covers 1 acre in the city of Republic. During a 1980
drinking water study, trichloroethylene (TCE), a volatile organic compound (VOC), was
detected in one of Republic's public water supply wells. Further investigation by the State
identified the site where SSC formerly manufactured printed circuit boards as the source of the
contamination. Allegedly, barrels of solvents, including TCE that was used as a copper residue
stripper and plating wastes were stored in a sump pit in the basement of the facility. The State
learned that after a fire destroyed the building, the new property owner (not SSC) buried the
remaining structure and its contents in the basement, where there also was an unplugged well.
SSC excavated material from the basement and installed three monitoring wells in response to an
order from the State.

The Town of Republic, with an estimated population of approximately 9,000, potentially is
endangered by contaminated ground water. There are private wells and community wells located
within a 3-mile radius of the site. One community well was closed as a result of the
contamination. Schuyler Creek is located approximately 2 miles downgradient from the site.

Site Responsibility:

This site is being addressed through Federal, State,
and potentially responsible parties' actions.

SOLID STATE CIRCUITS,
INC.

MISSOURI

EPA ID# MOD980854111

NPL LISTING HISTORY

Proposed Date:

10/15/84

Final Date:

06/10/86

Deleted Date:




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THREATS AND CONTAMINANTS

Ground water on and off site is contaminated with VOCs including TCE,
methylene chloride, and chloroform from the former site operations. TCE was
found in on-site soil prior to immediate response actions. Removal of
contaminated surface and subsurface soils have eliminated the risk of direct
exposure. Sewer line and utility workers could be exposed to contaminated ground
water; however, standard safety procedures will eliminate unacceptable risks.

CLEANUP APPROACH

Response Action Status

Immediate Actions: In 1984, the EPA fenced the area where the building once stood. In 1985,
following SSC's initial cleanup actions at the site, the EPA removed approximately 2,000 cubic
yards of soil from the basement, the soil underneath the basement, and debris to further stabilize
the site. The basement was sealed with a gravel and soil cover to bring it up to grade. The EPA
plugged the abandoned well, and two wells were installed to extract contaminated ground water.

Entire Site: Under the State's supervision, SSC conducted an investigation to determine the
nature and extent of site contamination and to identify alternative cleanup technologies. As a
result of the investigation, SSC will extract the contaminated ground water by using extraction
wells; perform on-site treatment of extracted ground water using two air strippers; discharge
treated water to the city sewer system to receive further treatment at the publicly owned
treatment works; and implement a city ordinance to prevent construction of drinking wells in or
near the contaminated ground water plumes. Monitoring of the ground water will continue to
ensure ground water quality. SSC began designing the remedy in the spring of 1991, which was
completed in late 1992. A ground water pump and treatment system was installed in 1993, and
will operate for an estimated 40 years or until established cleanup standards are met.


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Site Facts: The EPA, the Missouri Department of Natural Resources (DNR), and Solid State
Circuits signed a Consent Decree in July 1990, requiring SSC to conduct design,
construction, and operation activities, under State supervision. The Consent
Decree was entered by the Court in May, 1991.

ENVIRONMENTAL PROGRESS

After the initial cleanup actions undertaken by Solid State Circuits, Inc., the EPA
reduced remaining risks to public health and the environment by securing the site, removing
contaminated soil and debris, sealing the basement area, and installing wells to extract and treat
the contaminated ground water. Construction of the ground water pump and treatment system
has been completed and will operate for 40 years or until established cleanup standards are met.
During 1997 and 1998, Solid State Circuits, Inc. proposed implementing a pilot study focused on
accelerating the ground water cleanup. The Agencies agreed and construction of a horizontal
reinjection well began in 1998. The study documented a positive influence in accelerating the
ground water cleanup. As a result, use of the horizontal well was made part of the permanent
remedy.

Two Five-Year Reviews have been conducted by DNR. Both reviews concluded that the remedy
is protective of human health and the environment.

COMMUNITY INVOLVEMENT	

As the lead oversight Agency, DNR has conducted frequent community outreach activities both
during the remedy decision and implementation phases.


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SITE REPOSITORY

Springfield/Greene County Library,
393 E. Central,

Springfield, MO 65801

Superfund Records Center
901 N. 5th St.

Kansas City, KS 66101
Mail Stop SUPR
(913)551-7166

REGIONAL CONTACTS

SITE MANAGER:

E-MAIL ADDRESS:

PHONE NUMBER:

COMMUNITY INVOLVEMENT
COORDINATOR:

PHONE NUMBER:

E-MAIL ADDRESS:

STATE CONTACT:
PHONE NUMBER:

Steve Auchterlonie
auchterlonie.steve@epa.gov
(913)551-7778

Dianna Whitaker

(913)551-7003
whitaker.dianna@epa.gov

Candice McGhee
(573)751-1738

MISCELLANEOUS INFORMATION

STATE:	MO

071L

CONGRESSIONAL DISTRICT:	07

EPA ORGANIZATION:	SFD-MOKS/SUPR

MODIFICATIONS

Created by:	Karla	Created Date:	07/24/98 10:37 AM

Asb erry/SUPR/R7/U SEP A/

US

Last Modified by: Steve	Last Modified Date: 07/23/2008 04:05 PM

Auchterlonie/R7/U SEP A/U S


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