Site Narrative:
In April 2006, the property owner hired a consultant to investigate property formerly occupied by Fashion Cleaners. An on-site, private well was sampled. The results reported a tetrachloroethylene (PCE) concentration of 1,290 µg/L and a trichloroethylene (TCE) concentration of 94.4 µg/L.
On August 21, 2006, a Site Reconnaissance was conducted by Terracon. KDHE and the property owner were also on-site. Possible sources and potential migration routes were identified. The building had a total of four (4) floor drains. The former dry cleaning machine location was identified by an existing footprint on the concrete. The former trash storage and chemical shed areas were located. The former dryer/solvent reclaimer location was identified. The transfer area between the dryer and drycleaning machine did not appear to have any cracks in the concrete. The concrete sloped toward the southeast floor drain near the two machines.
In September 2006, the Source Investigation fieldwork was conducted by Terracon. A 54DT Trak Unit was used to collect soil samples from inside the building. Soil was collected from a total of 5 boring locations inside the building. All the borings displayed values exceeding the soil Risk-Based Standards of 121 µg/kg for PCE. Per the on-site Gas Chromatograph (GC), the highest concentration of PCE was detected in P3 at the floor drain. Concentrations ranged from 1865 µg/kg to 4970 µg/kg at the floor drain. Four boring locations consisted of collecting groundwater samples from two intervals. A deep groundwater sample was collected at approximately 40 feet bgs (bedrock), and a shallow sample was taken near the top of the water table (24 ft bgs).
In November 2007, Expanded Site Assessment (ESA) fieldwork was performed for groundwater plume delineation. A total of six groundwater probes were advanced to bedrock. Groundwater samples were collected from three intervals from each probe and analyzed for halogenated hydrocarbons. Terracon subcontracted Razek to perform the probe borings and onsite GC. Due to extremely different analytical results from detections in September 2006, all samples were sent to the offsite laboratory for confirmation. On January 22, 2008, additional ESA fieldwork confirmation sampling and additional delineation conducted. Terracon subcontracted EPS to perform the probe borings and onsite GC.
A Corrective Action Plan and Corrective Action Work Plan was completed in May 2008 and a SVE system was installed on November 14, 2008. System maintenance was conducted monthly to ensure the system is functioning. A baseline sampling event conducted in March 2009 indicated PCE in a site monitoring well in excess of 66,000 µg/L. As a result, KDHE collected down gradient groundwater samples on April 23, 2009. The samples did not detect any PCE down gradient, but degradation products were detected above the EPA Maximum Contaminant Levels (MCLs).
KDHE installed air sparge wells in November 2011 to assist in remediating residual contamination in the saturated zone. The AS/SVE system was shut down in 2014 due to funding. GSI restarted the AS/SVE system on November 3, 2016; both systems started without problems and were operating as designed. The system was down from December 2018 to March 2019 for repairs. Repairs were made to the compressor vanes in January 2020. The system shutdown indefinitely beginning June 2020. Groundwater on site was being monitored for rebound while the system is off. On February 2, 2022, the former dry cleaner building was completely destroyed in a structure fire at 940 Grant Ave. KDHE’s AS/SVE Remediation trailer was also significantly damaged by the fire and is unserviceable. |