Commercial dry cleaning sites are typically located in urbanized areas and increase in number and density within more highly-populated cities. Dry cleaner sites can range in size from small to moderate property footprints depending upon the scale of the operation.
Soil, groundwater and vapor phase contamination is primarily the result of chlorinated solvent spills, leaks and poor disposal practices. Contamination can be located both on and off-site, with significant potential for off-site groundwater contaminant migration due to the soluble nature of chlorinated solvents in general. Funding available for remediation at dry cleaner sites comes from a number of funding mechanisms including state dry cleaner funds, brownfields programs and voluntary cleanup through private developers.
Most contamination at dry cleaning sites is directly related to the chemicals or solvents used to clean clothing in dry cleaning process operations. These chemicals include the chlorinated solvents perchloroethene (PCE) and trichloroethene (TCE) which have historically been widely used at dry cleaning facilities. It is not unusual to have commingled plumes with both chlorinated solvents and petroleum hydrocarbons at dry cleaner sites due to their relative proximity to petroleum service stations in strip malls and shopping centers. Many dry cleaner sites are operating commercial businesses and require that operations be maintained during business hours. This factor affects the type and magnitude of remediation that can take place on-site.
Soil and groundwater remediation solutions at dry cleaning sites may include the following: excavation of the source area, free-product (DNAPL) removal, soil mixing, groundwater source area treatment, dissolved-phase groundwater plume treatment, plume cut-off barriers, and mixed-plume treatment strategies. These solutions can be achieved using well documented, proven and cost-effective in situ approaches such as sorption, enhanced anaerobic biodegradation (chlorinateds), bioaugmentation, enhanced aerobic biodegradation (petroleum) and/or in situ chemical oxidation (ISCO). REGENESIS provides a range of technologies for use at dry cleaning which include: PlumeStop, 3-D Microemulsion, Bio-Dechlor INOCULUM, ORC Advanced (powder/pellets), RegenOx ISCO for underground infrastructure compatibility and PersulfOx ISCO.
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