Between 1961 and 1989, wastewater from the 221 Sunset Drive manufacturing facility discharged to City Lagoon #3. The wastewater contained trichloroethylene (TCE), also referred to as trichloroethene, which resulted in subsurface contamination in the lagoon and surrounding area.
Between December 1989, when City Lagoon #3 was closed, and June 1989, when the city’s wastewater treatment plant was brought online, wastewater from the manufacturing facility was discharged to the Camdenton Treatment Plant Lagoon, also known as the C.P. White Lagoon. This lagoon is located on Ha Ha Tonka Road, about 1.3 miles southwest of City Lagoon #3.
The city closed the Camdenton Treatment Plant Lagoon in June 1989, when the city’s wastewater treatment plant became active. The wastewater treatment plant was built over a portion of the former Camdenton Treatment Plant Lagoon. The Camdenton Industrial TCE Contamination Advisory Team (CITCAT) identified this lagoon as a potential TCE contamination site, and requested the department conduct an investigation.