Project:
Dry Cleaner
Bottom Line: Investigated and remediated an operating dry cleaner site surrounded by neighboring businesses.
Summary of Project
The site was used for dry cleaning operations since 1990. Soil and soil gas investigations showed that soil was impacted by dry cleaning solvents, specifically PCE and its degradation products, TCE and cDCE. Groundwater was present at 25 feet below grade and was not impacted by the solvent release. Impacted soil was excavated beneath the dry cleaners and an SVE system was used to clean up impacted soil that was inaccessible.
- Conducted soil and soil gas investigations to identify the source of solvent releases.
- Defined the lateral and vertical extent of impacted soil and determined that groundwater was not impacted.
- Conducted a risk evaluation to identify exposure routes and receptors.
- Designed and implemented a site remediation program that included
- Installation of a non-chlorinated-solvent dry cleaning machine
- Excavation of VOC-impacted soil beneath the dry cleaners
- Installation and operation of an SVE system for impacted soil that was inaccessible for excavation.
- Operated the SVE system for 55 days until VOC mass removal became insignificant.
- Conducted rebound testing and concluded that remediation beneath the dry cleaner was complete.