2.1.1 Narrative
On August 12, 2013, crews excavated impacted soil from Grids 01 and 02, located in the southwest corner of the site. Crews also worked to treat the impacted soil with Free Flow 100 fixating agent and stage mixed material on site as Pile C. After XRF field screening, START collected confirmation soil samples from Grids 01 and 02 for total metals laboratory analysis.
On August 13, 2013, crews worked to treat previously excavated impacted soil with Free Flow 100 fixating agent. This mixture was staged on site and added to Pile C.
On August 14, 2013, crews excavated impacted soil from Grids 03 and 04, located in the southwest corner of the site. Crews also worked to treat the impacted soil with Free Flow 100 fixating agent and stage mixed material on site as Pile D. Backfill consisting of engineered sand was brought on site to begin filling the excavated area along the west end of the site. START collected 4 samples of source material found on site. These samples were submitted for total metals and lead speciation laboratory analysis.
On August 15, 2013, crews loaded trucks with treated soil from Pile C and shipped off-site for disposal. Ten truck loads, or approximately 200 tons, were removed from the site. Crews also worked to treat impacted soil with Free Flow 100 fixating agent and stage the mixed material on site as Pile D. START collected a composite sample of Pile D material for laboratory analysis to facilitate disposal approval. START also collected a confirmation soil sample from Grid 04 for total metals laboratory analysis.
During all Site operations, START operated and maintained DataRam and Personal DataRam (pDR 1500) units to monitor all dust/particulates on and off Site. The personal data ram has been deployed to the cab of the excavator to monitor dust levels near on-site personnel. All personal data ram readings have been near or at back ground dust levels for the area (10-100 ug/m3). Average concentrations of dust have been 15-45 ug/m3. All site operations are being conducted using a water fog with a fire hose to minimize dust levels. The action level for nuisance dust is 500 ug/m3.
2.1.2 Response Actions to Date
US EPA's contractor Environmental Restoration is in the process of treating and excavating soil from 2 feet below ground surface to the original building's concrete foundation (approximately 5-5.5' below grade). Treated and excavated soil is being staged on the eastern edge of property for off-site disposal. Crews are then backfilling excavated areas with engineered sand.
Samples collected from the treated soil and demolition debris were analyzed and results indicate that the constitutes of concern are under regulatory limits.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
The owner of the property has been identified, but has been non- responsive to repeated attempts to arrange for access to the property.
The U.S. EPA has obtained a warrant from a U.S. Magistrate to conduct the Site Assessment and Emergency Removal Action.
U.S. EPA has recently identified that an investment firm, Sabre Investments LLC, has purchased the back taxes for the property but has not yet filed the deed.
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