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The Harcros facility was identified as a potential source area in 1994-95 during a geoprobe investigation to identify source areas in the Gilbert and Mosley Site. On May 28, 1998, Harcros entered into an Interim Agreement with KDHE to conduct a Preliminary Investigation. The Preliminary Investigation was completed in August 2000 and indicated the presence of a TCE and PCE source area associated with the Harcros Facility. The City of Wichita named Harcros in a lawsuit for contaminant contribution to the Gilbert and Mosley Site. Harcros settled the lawsuit with the City of Wichita. Under the settlement agreement, the City of Wichita is responsible for conducting source control measures at the Harcros facility. A source area investigation was conducted in 2002 by the City of Wichita. Since the Harcros and Tri-State Laundry and Dry Cleaners Supply (Tri-State) facility source areas are adjacent to each other, the City is working the sites together. A draft Source Area Investigation Report and a Source Control Measures Report were submitted to KDHE for these source areas on in 2003.
Due to the relatively high concentrations of soil contamination present at the Harcros/Tri-State source areas, KDHE conducted indoor air sampling at adjacent residences. The indoor air results suggest that the contamination at the sites is potentially impacting indoor air quality; however, the concentrations in indoor air were not above current health risk values. Additional indoor air sampling was performed during the winter and spring of 2005, along with a soil gas/groundwater investigation to delineate the down-gradient plume.

In September 2005, two vapor mitigation systems were installed in houses in the neighborhood. PCE was detected above proposed mitigation levels in the basement of one of the houses, while the other was offered to the resident by the City of Wichita. In February 2006, off-site excavations of soil above the soil-to-groundwater pathway Risk-Based Standard for Kansas level for PCE were performed. An air sparge/soil vapor AS/SVE extraction system design was installed in 2007.

Confirmation sampling to determine effectiveness of the AS/SVE system on groundwater contaminant levels and soil concentrations was performed in 2011 and 2012. An optimization plan to improve the effectiveness of the AS/AVE system was approved by KDHE in 2012. The current operation includes pulsed SVE to increase removal of source contaminants from the soil zone. The AS system is still operational to address groundwater contamination.

In 2013-2014 an optimization plan was approved and implemented for the Harcros Site. Optimized AS/SVE system in use at site. Semi-annual sampling will continue to determine if new system is working well. Operation and maintainence of remedial system overseen by City of Wichita as of spring 2014. Chemical results will be evaluated from June and November 2015 sampling events to determine if a rebound test can be run at the site.

A rebound assessment will begin October 30, 2018, with the AS/SVE system to be shut down for a period of 6 months. After 6 months, the system will either be restarted or permanantly shut off pending results.