SJRE previously performed a Limited Soil Characterization for the North Westerly Creek Area at the former Stapleton International Airport in 2012. SJRE prepared a report describing ACM and other materials discovered during a pre-characterization visual surface inspection and potholing of the site. ACM debris had been observed on the surface in some grids located within the North Westerly Creek area, including some pieces of non-friable transite observed in isolated areas. The site was investigated in a grid system for characterization. The pertinent results from the SCR included:
- Twenty (20) of the forty-two (42) grid areas contained varying amounts of ACM
- One grid contained fragments identified as friable sheet vinyl (Hillside Area)
- All other ACM-positive grids contained some non-friable asbestos identified as materials such as transite, floor tile, and roofing material debris
- At grid F-11 (Plateau Area), several metal drums were uncovered containing unidentified liquids
- The Outer Loop area grids all failed due to ACM found at various depths
- The Plateau, Easement, and Hillside area grids had a mixture of passed and failed grids at various depths
SJRE has since been selected to perform the abatement oversight and contractor compliance for the North Westerly Creek remediation project at the former Stapleton International Airport.
SJRE will oversee the remediation plan for the Site which is separated into four (4) phases: Asbestos Remediation, Remediation of SNC Exceedances, Buried Drum Remediation, and Confirmation Sampling. For the remediation of SNC exceedances, SJRE will perform confirmation sampling to determine if the excavations need to be expanded laterally or vertically.
Remediation of ACM in soil will be accomplished by excavating horizontally until SJRE Asbestos Inspectors no longer observe ACM, and also excavated vertically to a depth to commensurate with the future land use (park and open space).
SJRE will also provide oversight during investigative potholing and during the Buried Drum Remediation where the soil will be excavated to the depth below the drums and any identified contamination.
Confirmation samples will be collected after SJRE have determined (by field screening methods) all contaminated soil has been removed.