A dry cleaner facility was located at the site between 1947 and 1960.  Stratus was contacted by an attorney for our client to investigate possible impacts from a former dry cleaner facility as part of a possible real estate transaction.  Several phases of soil and soil vapor sampling (installation of temporary vapor probes) were conducted inside and outside of the building, including in the basement through 2016. Low to moderate concentrations of Tetrachloroethene (PCE) and its breakdown products were detected throughout the property. Stratus prepared a Human Health Risk Assessment to assess possible impacts to the occupants of the building.

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Stratus also coordinated with a plumbing company to identify the actual locations of the sewer laterals to document possible source areas for the detected dry cleaner chemicals.

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In late 2016, the property owner requested that the work be conducted under regulatory oversight for the purposes of obtaining a closure letter.  She then entered into the voluntary Site Cleanup Program (SCP) with the Santa Ana Regional Water Quality Control Board (SARWQCB) providing regulatory oversight.  

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In 2017, a total of 26 permanent vapor probes were installed as part of the approved scope of work, which included the installation of probes to a depth of 100 feet bgs to evaluate possible impacts to groundwater.  The results will be included in future reports to be issued to the SARWQCB.

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