Project Name: Former Rainbow Cleaners, Northview Shopping Center, Westminster, Colorado

Date Project Began: September 2005

Date Project Completed: Ongoing

Type of Project:  Casey Resources, Inc. (CRI) completed environmental investigations at a former dry cleaner operation and identified significant tetrachloroethene (PCE) impact in bedrock and groundwater.  The information was summarized in an Integrated Corrective Action Plan (ICAP) which was submitted to and approved by the Colorado Department of Public Health and Environment (CDPHE).  The ICAP remediation was implemented with the removal of indoor soils to approximately five feet below the floor surface and installation of a passive vapor venting system.  As part of the indoor remediation, CRI was requested to provide environmental monitoring and oversight during building sanitary sewer pipeline replacement and to conduct 8-hour indoor air monitoring to assess air quality in building areas adjacent the sewer line repairs.  CDPHE correspondence and negotiations were an integral part of the monitoring of the sewer pipeline repair project.  Following the completion of the indoor remediation, CRI prepared an amendment to the ICAP which stated that outdoor excavation would be replaced with in-situ chemical oxidation at known source locations.  CRI negotiated with the Colorado Department of Public Health and Environment (CDPHE) to complete the in-situ work and complete one year of groundwater monitoring.  On completion of the groundwater monitoring, CDPHE and CRI will evaluate whether an Environmental Covenant for the property is necessary.

Type of Contamination: PCE contaminated soil and groundwater.