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Accelerated Remedy-in-Place and Closure of Dry Cleaning Sites

Large Diameter Borings

Location: Multiple Sites in Kansas

Client: Kansas Department of Health and Environment

EMR successfully completed remedial investigation (RI) activities at eight current/former dry cleaner sites, which included installation of soil vapor probes inside and outside of the dry cleaner facilities to accurately determine the location and size of potential contamination source areas. Soil vapor samples were collected using Gore Sorber® equipment. This type of assessment was valuable in minimizing the number of soil samples and groundwater monitoring wells required to delineate soil and groundwater contamination onsite and offsite. RI activities defined groundwater contaminant plumes up to one-mile long, impacting both surficial and intermediate aquifers.

 

EMR implemented a variety of remedial technologies at the dry cleaner sites impacted with PCE, TCE, cis-1,2 DCE, and Vinyl Chloride, including soil excavation and offsite disposal, source removal by large diameter borings (LDBs), air sparging, soil vapor extraction, and in situ chemical oxidation treatment. A total of 170 tons of contaminated soil was removed and disposed of offsite using LDBs because of the proximity to nearby buildings. To treat impacted groundwater and residual soil contamination, EMR installed air sparge and soil vapor extraction wells in the LDBs prior to backfilling. EMR successfully achieved remedy-in-place at five dry cleaner sites.

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