Superfund Record of Decision (EPA Region 7): Solid State Circuits, Republic, MO. (First Remedial Action) September 1989

摘要

The Solid State Circuits (SSC) site, a former industrial and manufacturing facility, is located in Republic, Missouri, approximately twelve miles southwest of Springfield. The city of Republic obtains its drinking water from three municipal wells which draw from the deepest of three underlying aquifers. Uses of the facility since 1902 included milling, refrigeration, printed circuit board manufacturing, and photoprocessing, as well as other, unknown, activities. The major wastes generated appear to have been cleaning solvents used in the circuit board process and wastewaters from the circuit board activities. Sampling by the Missouri Department of Natural Resources (MDNR) in 1982 revealed contamination with TCE in Municipal Well Number 1, 500 feet south of the site. The SSC site was identified as a possible source. Subsequent actions included pumping tests, several major soil and debris excavations and removals (thereby eliminating the source of contamination), and taking Municipal Well Number 1 out of service. The primary contaminants of concern are VOCs, particularly TCE.