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: ------- 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. ------- 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. ------- 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 ------- |