Imperial Metal & Chemical Co.
EPA Project Manager
Mr. Grant Dufficy - 3LC30
U.S. Environmental Protection Agency - Region III
1650 Arch Street
Philadelphia, PA 19103-2029
Phone: (215) 814-3455
- Sampling of apparent petroleum product contained in two sumps in the IHOP basement
- Installation of nine well points (corings through the basement floor) to evaluate assess the possible occurrence of free product beneath the IHOP basement floor (Note: the well points were used to measure the thickness of any free product floating on the groundwater beneath the floor – no soil, groundwater, or product samples were collected from the well points)
- Collection of soil samples from the boreholes of four groundwater monitoring wells installed along the East Tioga Street portion of the property
- Collection of groundwater samples from the monitoring wells and beneath the petroleum product in one of the basement sumps
A Phase 1 Environmental Site Assessment (ESA) was conducted by contractor GZA Environmental Inc. in 2005 at the property. During the site reconnaissance, petroleum staining was observed on the basement floor of the IHOP, and LNAPL was observed in the basement sumps. GZA initiated Phase 2 intrusive investigation activities in 2005/2006 during which six soil samples (including a duplicate sample collected at SB-2) were collected from the boreholes of the monitoring wells installed onsite. The soil samples were collected from intervals exhibiting elevated photo ionization detector (PID) readings, and/or visible/olfactory evidence of fuel oil impact and were analyzed for Semi volatile Organic Compounds (SVOCs) and diesel range organic (DRO). GZA initially compared the results to the Pennsylvania Department of Environmental Protection (PADEP) non-residential used aquifer soil MSCs, and then later compared them to the residential used aquifer soil MSCs. None of the detected SVOCs were above either the residential or non-residential MSCs. GZA had demonstrated attainment of the residential statewide health standard for soils containing SVOCs, and PADEP granted liability relief to Imperial/Aramingo for SVOCs in soils in January 2011.
Groundwater investigations were completed by facility/owners between 2006 and 2010. Phase 2 subsurface investigation activities at the facility property included:
The facility is located at 3400 Aramingo Avenue, Philadelphia, Pennsylvania. The facility was situated on approximately 3.5 acres of land.
Imperial operated as a large quantity generator of hazardous waste under USEPA ID number PAD070283023. The facility manufactured type metal, and zinc and magnesium plates for the graphic arts industry. It later began manufacturing lithographic plates (flat, thin-gauge aluminum sheets with specially prepared surfaces and photosensitive coatings) when the use of type metal was phased out. The facility also reclaimed quantities of tin from type metal dross accepted from its customers.
The Aramingo Avenue facility was operational from at least 1930 until 1986. In 1986, the facility phased out its type metal manufacturing operation and moved its lithographic plates manufacturing operation to 2050 Byberry Road, Philadelphia, Pennsylvania. The Aramingo Avenue facility was closed in 1986. The Byberry Road facility was operated under a separate USEPA ID number. Imperial no longer operates at either location. The former Aramingo Avenue facility was demolished in 1987, and Imperial Plaza Shopping Center (Plaza) now operates at this address.
- Some of the site's key documents of interest are accessible below:
- Corrective Action Statement of Basis [PDF, 57 KB, 5 pages About PDF]
- Environmental Covenant -Deed Restriction [PDF, 213 KB, 8 pages About PDF]
- Environmental Indicator Determination - Human Exposures [PDF, 911 KB, 14 pages About PDF]
- Environmental Indicator Determination -Groundwater Migration [PDF, 830 KB, 14 pages About PDF]
- Documents and reports regarding this facility also can be reviewed in person at these locations:
U.S. EPA Region III
Land & Chemicals Division
1650 Arch Street-11th Floor
Philadelphia, PA 19103
Call for an appointment.
- Submit a FOIA Request
Get instructions on how to submit a FOIA request. Additional fee for requests over 100 pages.
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For more information about EPA’s corrective action webpage, including Environmental Indicators, please visit our site at: www.epa.gov/reg3wcmd/correctiveaction.htm