A prominent commercial developer was referred to APPLIED ENVIRONMENTAL by a banking client. The client planned to redevelop a site on Woodward Avenue in Royal Oak, Michigan from a fast food restaurant to a coffee and flower shop. Historical information discovered by a previous assessment revealed that the southern portion of the subject property was occupied by a gasoline station from 1965 to 1975. The underground storage tanks (USTs) were reportedly removed. Confirmation of UST removal and/or identification of any potential orphaned USTs was required. APPLIED ENVIRONMENTAL conducted a ground penetrating radar survey at the property which did not identify any underground storage tanks. A Phase II subsurface investigation identified volatile organic compounds (VOCs), polynuclear aromatic compounds (PNAs), and lead at concentrations which exceeded Michigan Department of Environmental Quality (MDEQ) Residential and Commercial I – Part 201/213 Generic Cleanup Criteria and Screening Levels in soil. Analytical results indicated levels of VOCs above the Soil Volatilization to Indoor Air Criteria and the Soil Saturation Concentration Screening Level. Subsequently, approximately 400 cubic yards of impacted soil were removed. Soil verification samples collected from the excavation confirmed that concentrations of remaining impacted soil did not exceed the Soil Volatilization to Indoor Air Criteria or the Soil Saturation Concentration Screening Level. APPLIED ENVIRONMENTAL managed the restoration of the excavated area as a parking lot.
Due to concentrations of remaining contaminants in soil exceeding the MDEQ Residential and Commercial I – Part 201/213 Generic Cleanup Criteria and Screening Levels, the property was deemed a “facility”. A Category N BEA and Due Care Plan were submitted to the MDEQ with a request for a determination of adequacy. The BEA and Due Care Plan were successfully affirmed by the MDEQ.