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Record of Decision System (RODS)



City & State:  PHILADELPHIA  PA  19135
EPA ID:  PAD046557096
EPA Region:  03
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-98/012
ROD Date:  12/31/1997
Operable Unit(s):  01
Media:  Groundwater, Other, Sediment, Soil, Solid Waste, Surface Water
Contaminant:  Base Neutral Acids, Dioxins/Dibenzofurans, Metals, PAH, PCBs, Pesticides
Abstract:  Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.

The Metal Bank Superfund Site is a former scrap metal and transformer salvage facility located in northeastern Philadelphia, Pennsylvania. The site is next to industrial buildings, a school, and the Delaware River. A stormwater outfall owned by the City of Philadelphia is located near the site and empties into a mudflat west of the Metal Bank property. The Quaker City Yacht Club is located west of the mudflat. A Philadelphia drinking water intake and treatment plant are located upriver of the site. Surface water from the site drains towards the Delaware River, which provides drinking water for the City of Philadelphia through the Baxter Water Intake and several municipalities in New Jersey through the Delran Water Intake. Although the Baxter Treatment Plant and its water supply intake are upstream of the site, the Environmental Protection Agency (EPA) concluded its presence was important based on the possibility that polychlorinated biphenyls (PCBs) from the site may reach the intake when the tides in the Delaware River backwash against the river current. The Plant does not have special equipment to remove PCBs. The river serves as a habitat to numerous aquatic species, including the endangered Shortnose Sturgeon.

Most of the southern area is within the 100-year floodplain. Most of the southern area of the Metal Bank property was part of the Delaware River prior to 1950. Approximately 15 feet of fill underlies the site. The fill contains pieces of brick, lumber, cloth, metal, and concrete. An unconsolidated and a bedrock aquifer are present at the site. The groundwater varies between seven and 16 feet below the site. The southern area also includes an underground storage tank buried inside a non-aqueous phase liquid are (NAPL Area) where residual oil is suspected and where PCB "hot spots" have been identified.

The building area, which includes six buildings on the northern portion of the property, contains PCB contamination. Groundwater samples included PCBs, VOCs, and SVOCs. A layer of oil was found floating on the groundwater at a particular section. Groundwater seeps were observed to include PCBs, pesticides, and manganese. PCBs were also found in soil samples taken on site in the courtyard and the southern area. Subsurface soil contaminants included PCBs, metals, SVOCs, VOCs, dioxins, total petroleum hydrocarbons (TPH), and furans. Mudflat sediments were analyzed for PCBs, pesticides, metals, and SVOCs.

Beginning in 1962, the site was used for scrap metal storage. Between 1968 and 1973, the site was also used for transformer salvage operations. Transformer oil was drained on a concrete pad which was connected to an underground storage tank. Spills of the oil and possibly a rupture of the underground storage tank caused soil and groundwater contamination at the site. Copper wire may have been burned at the site to remove insulation, between 1968 and 1972. The storage of scrap metal continued at the site until 1985, while transformer salvage operations concluded in 1973. The southern area of the property, which borders the Delaware River, was used for scrap metal recovery. The northern area consists of brick and steel buildings, a courtyard, and a parking area.

The Philadelphia Authority for Industrial Development (PAID) continues to hold the title to the site properties. Metal Bank has full possession of the premises and is the equitable owner of the site.
In June 1991, EPA signed an Administrative Order by Consent (AOC) to conduct a Remedial Investigation and Feasibility Study. The remedial action in the December 1997 Record of Decision is intended to address contamination in soils, sediment, groundwater, and surface water impacted by the release of hazardous substances from the site.
Remedy:  This remedy addresses contaminated soil, sediment, surface water, and groundwater at the site and includes the following components: installation of an oil collection system; interceptor trenches with oil-water separators and sump pumps; discharge of collected groundwater to the Delaware River; off-site disposal of collected oil; installation of temporary cofferdams prior to soil/sediment excavation; excavation of contaminated soil within the Courtyard Area within two feet of the surface where polychlorinated biphenyl (PCB) concentrations exceed 10 ppm; excavation of contaminated subsurface soil in the Southern Portion where PCB concentrations exceed 25 ppm; excavation of contaminated sediments within 100 feet of the Metal Bank property and within four feet of the surface of the river bed; excavation of sediments beyond 100 feet of the property which have PCB concentrations exceeding 1 ppm; disposal of contaminated soil and sediments that are not hazardous by either backfilling on the Southern Portion of the property, or at an off-site landfill; disposal of hazardous soil and sediments at an off-site landfill; removal and disposal of the underground storage tank and its contents from the Southern Portion of the property; backfilling of excavated areas in the Courtyard Area with clean soil; installation of a 12-inch soil cover over the entire Courtyard Area; backfilling of excavated areas in the Southern Portion of the property with excavated soils and sediments with PCB concentrations less than 25 ppm; installation of a 24-inch soil cover over the entire Southern Portion; establishment of an erosion-resistant vegetative cover over the Courtyard Area and Southern Portion; restriction of access by installing and maintaining a fence around the entire perimeter of the Metal Bank property; posting signs prohibiting consumption of fish; restrictions on the deed to the property to prevent future residential or agricultural use of the site, the use of groundwater, and intrusive activities into the subsurface soils below the water table in the Southern Portion; additional investigation to determine whether dense non-aqueous phase liquids (DNAPLs) are present at the site and whether the storm sewer system in the vicinity of the site is contaminated; and monitoring of groundwater, the Delaware River, and the Baxter Water Intake.

Estimated Capital Costs: $14,499,000
Estimated Annual O&M Costs: $409,000 (Years 1-2); $149,000 (Years 3-30)
Estimated Present Worth Costs: $17,273,000
Text:  View full-text ROD [ 229K ]
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