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A soil gas survey conducted at the former KTKA-TV facility on First and Monroe in Topeka detected the presence of PCE and TCE at the site. The site was placed on the CERCLIS.

A preliminary assessment was completed in 1996 and indicated that PCE and TCE was detected in groundwater samples from the former Montgomery Wards building and an industrial well at Hill's Pets Products.

An ESA was later conducted in 2002 utilizing Gore-Sorber module sampling and groundwater sampling. During the ESA, PCE was detected in Gore-Sorber modules placed on-site. In addition to soil gas, PCE and TCE was detected in groundwater samples from the shallow and deep zones at the site. TCE appears to extend north-northeast to the Kansas River. As part of an on-going investigation, monitoring wells were installed and groundwater sampled. Four sets of nested wells were installed near and downgradient of the source area. Soil and groundwater impacted with chlorinated solvents was detected at the site above the MCLs. The plume extended approximately 1,000 ft downgradient. Additional monitoring wells were installed to further define the plume. PCE and its degradation products were detected in the source wells.

A Source Investigation (SI) was conducted to define the extent of contamination in the soil. Findings from the investigation led KDHE to propose a remedial technology to address these concerns.

A Corrective Action Plan (CAP) was developed for the use of ISCO to address the contaminants in the vadose zone. Sodium permanganate was the selected oxidant. An approximate 80% reduction in contaminate concentrations was realized at the site.

A CAP/CAWP was developed in 2009 for the excavation of contaminated soil using large diameter boring (6') equipment and placement of AS/SVE in the excavated boreholes.

In December 2019, the air sparge system compressor seized and the AS/SVE system shutdown. The system will remain shutdown until sufficient funding is available to fix/replace the system and restart operations. The final quarterly monitoring event, which occurred in spring 2020, indicated contamination may be rebounding now that the system has been off for several months. Preliminary results from the Fall 2020 event confirm that rebound is occuring. Options to repair and restart the remediation system are being evaluted.