Highway 30 Sanitary Landfill Investigation and Corrective Measures

Contracting Agency: City of Aurora Colorado

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Since 2017, Quantum has managed this site investigation to assess extents of subsurface methane gas and constituents of concern in groundwater at this closed 97-acre pre-Subtitle D municipal landfill in Aurora, Colorado. A CDPHE-approved investigation workplan is being implemented and includes installation of new soil vapor monitoring points and groundwater monitoring wells, eight quarters of soil vapor and groundwater monitoring, and preparation of investigation and corrective measures reports. The initial investigation report was completed in 2018 and provides a summary of the site conceptual model, monitoring results, and proposed additional investigations to close data gaps. Upon completion of the two-year monitoring period, Quantum will prepare a final report that will discuss proposed corrective measures for the landfill facility.