See Initial POLREP.
Since the last reporting period, ERRS has commenced prepping and sealing activities on the PCB impacted floor of building 1014 to finish the two remaining coats of epoxy in order to seal the area. Saw-cutting and excavation of the 10-feet deep test trench along the east, west, and south perimeter of the planned excavation in north-central area of building 924 has been completed, with the exception of a portion of the west side that was retained for machine traffic, in order to investigate the source of oil in the basements and vaults. Oil product has been detected on the southeast corner of the test trench as well as in various south-central areas. Excavation of the interior of the test trench has begun on the southeast side beginning with concrete floor removal, but was halted to complete floor sealing activities in building 1014. Soil excavation south of building 912 has been halted until the demolition and cleanup of buildings 1012, 1013, and 1014, sealing of the building 1014 concrete floor, and excavation at of the oil infiltration area of building 924 is complete.
Planned removal activities include the following:
• Surgical soil excavation for investigation of the subsurface oil intrusion source at building 924;
• City of Chicago demolition of remaining buildings;
• Continued surgical soil excavation in areas of concern as identified by the subsurface soil assessment, and;
• Completion of sealing the PCB impacted floor at building 1024.
The following actions are anticipated to occur during the next reporting periods:
• Reassess buildings for structural integrity;
• Further investigation and excavation of the north central area in building 924 to determine the oil intrusion source into the basement, vaults, and pits;
• Waste profiling to ensure proper disposal, and;
• Completion of the sealing activities on the building 1014 concrete floor.
• Documentation and photo-documentation of all EPA and city work,
• Address contaminants of concern throughout the site based on findings from the subsurface investigation, and;
• Tracking of excavation and disposal quantities, including soil and water.
|
