The Ecusta Mill is a former flax pulping and paper manufacturing facility that was built in 1939 and was operational until 2002. Cellophane production also occurred at the facility for approximately 30 years. In addition, the following activities have occurred at the Site: chlorine production operations using Sorenson mercury cells (electro-chemical building); caustic storage; water and wastewater treatment; and printing. EPA's Removal Program and the North Carolina Department of Environment and Natural Resources (NC DENR) first responded when the plant was closed down in 2002. Of primary concern were potential releases from an interruption of power to the basement sumps under the production buildings. The EPA Environmental Response Team conducted sampling of the concrete floor, the sub-floor, and soils under the electro-chemical building and sediments in on-site ditches. This sampling confirmed the presence of mercury in the sub-floor structures to 16 feet below ground surface (580 mg/kg) and the floor drains (260 mg/kg) of the electro-chemical building, in the indoor air and in the overland drainage ditches which had received historic discharge from the building.
An Expanded Site Inspection (ESI) was conducted by EPA Region 4, Science and Ecosystem Support Division and the State in March, 2004. The ESI focused on two main areas of concern, the electro-chemical building and the Aeration and Sedimentation Basin (ASB) area. Mercury was detected in soils adjacent to the electro-chemical building, in sediments in the on-site drainage ditches and in sediments of the Davison River immediately adjacent to the manufacturing area. The ESI also confirmed soils and sediments in other areas of the site are contaminated with mercury and dioxin. Groundwater sampling has confirmed low-levels of mercury in groundwater near the electro-chemical building, low levels of carbon disulfide and 1,1-Dichloroethane near the cellophane plant, and a high pH reading (pH 12.17) in the area of a previous caustic spill.
The total Site is approximately 527 acres in a mixed-use residential/industrial area. The manufacturing facility is approximately 213 acres. The ASB has a surface area of approximately 75 acres and was used for wastewater treatment. The ASB also receives storm water from approximately one-third of the site, including those areas historically most actively involved in paper production. The following industrial solid waste landfills are located at the Site: the Island landfill, the new ash landfill; the old ash and sludge landfills which are unlined industrial landfills which do not have permit numbers issued. The previous site owner is in the process of closing all landfills in compliance with State permit requirements.
A small arms firing range has been historically operated on the Site south of the main manufacturing operations on a largely undeveloped parcel of land near the confluence of the Davidson and French Broad Rivers. Lead impacted soil has been document from the historic firing range.
Renova Partners, a Brownfields redevelopment company purchased the property in January 2008. Renova formed a subsidiary company Davidson River Village, LLC (DRV) who is conducting complete demolition of all on-site structures prior to site redevelopment. D.H. Griffin was retained by DRV to conduct the demolition.
DRV is conducting the Removal Activities at the site under an AOC with EPA. They have hired Shaw Environmental as the lead environmental contractor. Removal Activities include a Time Critical Removal Action and 2 Non-Time Critical Removal Actions.
DEMOLITION/ DEMO SUPPORT
DH Griffin continued removing utilities to 4 feet, Shaw is providing QC oversight.
DH Griffin continued demolition of the trestle adjacent to building 62 and the two
northern most buildings from 109.
DH Griffin continued removing concrete foundations and impacted soil around remaining
two UST’s at building 62, impacted soil staged in building 89.
DH Griffin continued crushing operations in the north and south ends of the site.
DH Griffin continued demolition of building slabs 30,37,48,50,53,57.
DH Griffin continued perimeter dust monitoring. No dust issues or exceedences were
noted.
DH Griffin moved arsenic soil from building 14 and staged in the coal yard for future
placement.
DRV continued discharging from the north clarifier into the ASB.
ENVIRONMENTAL
Shaw collected samples from crush material for lead analysis. Analytical results are all
below regulatory guidelines.
Shaw performed daily monitoring of building 89 soil stockpiles. The highest PID reading
was 10.7 ppm for the week.
Shaw began/completed delineating impacted soil using a geoprobe at building 27. A total
of 37 borings were collected, monitoring wells were installed at 3 of these locations.
Shaw collected under slab samples from under buildings 30 and 37 all were below SRG’s
for XRF metals analysis.
Shaw used the geoprobe to collect groundwater pH at three areas surrounding building 15
to investigate groundwater pH. pH was normal @ 6.9-7.9
Shaw pumped the water from the south end of the green water pit to the frac tank,
approximately 10,000 gallons pumped, 6-8” of sludge on vault bottom. Additional green
water is also suspected in the inaccessible north end of the vault.
Shaw sampled sludge from the green vault pit, sludge press pile and the clarifier bottom.
DEMOLITION/ DEMO SUPPPORT
Shaw and DH Griffin will continue the building clearance process.
Shaw will continue collecting samples for crushed debris.
DH Griffin demolition activities will continue in buildings cleared.
DH Griffin will continue loading out scrap, C&D debris and non-hazardous materials.
DH Griffin will continue removing utilities less than 4 ft below ground level, Shaw will
continue QC oversight.
DH Griffin/ Shaw will continue slab removal and investigation process.
DH Griffin will continue removal of the two remaining UST’s at building 62.
DH Griffin will begin grading operations starting from the northeast end of the site
moving south.
DH Griffin will pump water from buildings 11 and 15 to the grit chamber with regulator
approval and backfill the basement.
ENVIRONMENTAL
Shaw will continue site wide sub slab analysis and utility investigation.
State/federal regulators will continue to investigate arsenic soil background levels.
Shaw will continue to monitor staged soil in building 89 for volatiles and to sample
crushed material for lead analysis.
Shaw will sample the wells (3) installed in the area around building 27.
Shaw will collect confirmation wall samples from the UST excavation area at building
62.
Pumping water from the basement of Buildings 11 and 15 into the ASB via the east ditch. Shaw will monitor the pH of the east ditch throughout the process.
Pumping the water from the green water pit into an onsite frac tank and collect a sludge sample from the pit.
Remove USTs from Building 62. Once the tanks are removed, sample underneath and around the concrete pads and analyze for diesel range organics, gasoline range organics, volatile organics, and semivolatile organics.
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