Site Number: |
0305521 |
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Contract Number: |
EP-S3-12-03 |
D.O. Number: |
0026 |
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Action Memo Date: |
7/21/2016 |
Response Authority: |
CERCLA |
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Response Type: |
Time-Critical |
Response Lead: |
EPA |
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Incident Category: |
Removal Action |
NPL Status: |
NPL |
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Operable Unit: |
OU1 |
Mobilization Date: |
8/8/2016 |
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Start Date: |
8/8/2016 |
Demob Date: |
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Completion Date: |
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CERCLIS ID: |
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RCRIS ID: |
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ERNS No.: |
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State Notification: |
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FPN#: |
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Reimbursable Account #: |
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1.1.1 Incident Category
The Lower Darby Creek Area - Clearview Landfill Site Operable Unit 01 (Residential Area) is the location of a release of hazardous substances in soils within a residential neighborhood. A Removal Action will address certain contaminated residential soils posing an unacceptable risk to human health.
1.1.2 Site Description
The
LDCA Site includes two landfills: 1) the Clearview Landfill and 2) the Folcroft
Landfill and Annex. The Clearview
Landfill is located along the eastern bank of both Darby Creek and Cobbs Creek,
near the intersection of 83rd Street and Buist Avenue. The footprint of Clearview Landfill is
much larger than the area now subject to a Removal Action and lies primarily within Darby Township, Delaware County, PA, but partially within the
limits of the City of Philadelphia. OU1
includes the Clearview Landfill, the Eastwick Regional Park (a/k/a “City Park”
or “Park”) which abuts the eastern limits of the present-day landfill footprint,
and a portion of the Eastwick neighborhood (a residential area) located generally
east of the present-day landfill area and the Park. The Removal Action involves the removal of soil from the residential area of Philadelphia once within the footprint of the landfill and then staging of that soil on a portion of the landfill located in adjacent Delaware County. A Remedial Action will be conducted in the future to address those aspects of the Site not addressed by the Removal Action.
NOTE: A Removal Action was previously conducted in a different area of the Clearview Landfill between November 2011 and September 2012 relating to the removal of PCBs-contaminated soil from the Southern Industrial Area of the Clearview Landfill. See POLREPs 01 through 23 relating to that response action. Since the present Removal Action in the residential area relates to PAHs in an entirely separate area of the former landfill, this Removal Action will be documented in a new series of POLREPs beginning herein.
1.1.2.1 Location
The Removal Action involves the removal of soil from residential properties in the Eastwick neighborhood of Philadelphia and storage of that soil upon a portion of the Clearview Landfill in Darby Township. The locations of individual homes will not be reported in this POLREP.
1.1.2.2 Description of Threat
A group of compounds called polycyclic aromatic hydrocarbons (PAHs) present the majority of the threat posed by the Site. Benzo[a]pyrene
(B[a]P) is the primary risk driver among the detected PAH compounds. Elevated concentrations of B[a]P and other
PAHs are detected in soils within the residential properties of Eastwick neighborhood and adjacent City
Park. The levels of PAHs pose an unacceptable risk
to residential human receptors (residents of the Eastwick neighborhood exposed
to contaminated soils). Elevated lead
concentrations are also found within the PAH-contaminated soils. Incidental
ingestion of lead in the soil may also result in increased blood lead
levels. Lead is known to adversely
affect the central nervous system. The threats are more fully described in the July 21, 2016 Action Memorandum.
1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
The Site is an NPL Site. The RPM for the Site and the OSC relied upon
existing soil sample information (e.g., data collected during remedial investigation or preliminary design activities) and newly collected soil
analytical results to comprise a Removal Site Evaluation (RSE). The RSE indicated that elevated levels of hazardous substances are located in residential soils
within the OU1 Residential Soil Area.
The hazardous substances are present at levels which pose an
unacceptable excess cancer risk to exposed human receptors.
The maximum
concentration of PAHs in the surface (0 to 12 inches) soil of the residential
properties in the Eastwick neighborhood are 118 mg/kg (ppm or parts per
million). The maximum concentration of
B[a]P within these soils is 8.6 mg/kg which is well above the 1x10-4
excess cancer risk level for this compound. Elevated PAH
concentrations are also found in subsurface soils well above the 1x10-4
excess cancer risk level. Based upon
on-scene observation, some of the contaminated soils are poorly vegetated or
mixed into garden or play areas allowing an increased chance of unacceptable
exposure to elevated PAHs. Elevated lead
is also found in a limited area of the Eastwick neighborhood. The area of elevated lead contamination is
believed to exist within the area of elevated PAHs contamination described
above.
The removal site evaluation ad threats posed are more fully described in the July 21, 2016 Action Memorandum.
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