See POLREP 1.
Gross decontamination of the plating shop floor was completed during the period 1/25/2007 through 2/2/2007. Due to the extensive spalding and cracking that exists in the concrete floor, it was determined that pressure washing would cause further damage to the floor and would not be an effective, viable method of surface decontamination. The floor surfaces were therefore swept and vacuumed in order to remove any loose debris, dirt and chemical residues that remained.
Clean-out of the floor pit was also completed during this time period. All equipment had been removed and the floor surface of the pit was swept and vacuumed until free of loose dirt and debris. Orange snow-fencing was installed around the floor pit as a warning to anyone who might enter the building. Additionally, wood planking was installed across a portion of the pit adjacent to a walkway to protect against a fall hazard.
Transportation and disposal operations were also completed during the time period. A total of 54 additional drums were shipped for off-site disposal, bringing the total to 166 drums shipped as of 2/2/2007. An additional 30 cubic yards of contaminated debris were shipped from the plating shop, bringing the total to 110 cubic yards shipped from the 58 Green Street address.
Site demobilization was completed by 2/2/2007. All utilities contracts were terminated, the command post and crew trailers were demobilized and all site entrances were locked. The Con-Ex boxes that were used for drum storage at the Township recycling center were cleaned out and demobilized from the site.
In July of 2007, EPA conducted a review of analytical data from previous site sampling efforts. Based on the review, it has been determined that contamination has penetrated the concrete block in portions of the foundation walls of the plating shop. Visual observations also indicate that contamination may have penetrated the concrete floor, potentially passing to the soils beneath the building. Therefore, additional surface cleaning may not be an effective method of building decontamination. Other methods of remediation would potentially entail partial or complete building demolition which is beyond the scope of the current removal action. Therefore, as of July 30, 2007, the scope of the current removal action has been determined to be complete. Additional assessment will be conducted to determine the eligibility and extent of any future Removal Action for this site.
The Scope of Work for this Removal Action has been completed as of 7/30/07.
Additional assessment sampling will be conducted to evaluate potential sub-surface contamination and to determine the complete nature and extent of the building contamination. Mitigation of site hazards may be conducted under a second Removal Action depending on the results of the assessment.
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