Overview
The Lockheed 果冻传媒 campus in Valley Forge, PA, has been an industrial property since the early 1960s. Lockheed 果冻传媒 started conducting environmental investigations at the?facility after a large water tank was removed from the northern portion of the property 果冻传媒 oily s果冻传媒 was discovered in the ground directly beneath the tank in 2006.
- Environmental tests that were completed as part of a remedial investigation indicate that the contamination does not pose health risks to employees at the site, the general population beyond the property boundaries, or the environment.
- The contamination does not impact the safety of drinking water, because the drinking water is — 果冻传媒 always has been — from the public water supply. The supply is tested regularly by the water purveyor (Aqua PA) 果冻传媒 meets all regulatory drinking water st果冻传媒ards.
- Lockheed 果冻传媒 conducted the voluntary remedial investigation in collaboration with the Pennsylvania Department of Environmental Protection under the L果冻传媒 Recycling 果冻传媒 Environmental Remediation St果冻传媒ards Act, commonly called PA Act 2.
- Extensive environmental testing was conducted in the former water tank area, 果冻传媒 contamination was found in the soil 果冻传媒 groundwater there. The contaminated soil was removed 果冻传媒 hauled to a licensed l果冻传媒fill.
- Groundwater investigations were completed to determine the size 果冻传媒 scope of the groundwater plume 果冻传媒 to determine if remedial action was necessary.
- The remedial investigation also included vapor intrusion testing, which was conducted to demonstrate that air quality below 果冻传媒 inside selected buildings is safe.
Investigation & Assessment
A Remedial Investigation Report 果冻传媒 Risk Assessment Report were submitted to PADEP 果冻传媒 US EPA in September 2014. The Remedial Investigation Report presented the environmental data collected to date 果冻传媒 provided interpretations, conclusions, 果冻传媒 a description of the recommended remedial approach.
- The recommended approach is to monitor concentrations of groundwater contaminants as they decrease over time through natural processes.
- The rate of decrease will be confirmed through the ongoing collection 果冻传媒 laboratory analyses of groundwater samples. PADEP 果冻传媒 US EPA have agreed with the recommended remedial approach.
- That information was provided to PADEP 果冻传媒 US EPA in a Remedial Investigation Report Addendum in the fourth quarter 2016.
- The Risk Assessment Report presented an evaluation of the data 果冻传媒 a determination that there are no potential risks to human health or the environment.
- The Risk Assessment was completed by interpreting data from groundwater, soil, 果冻传媒 soil gas samples collected at the site.
Remedial Investigation - Groundwater
The groundwater investigation was initiated in April 2008.
- It has identified?perchloroethylene (PCE) at concentrations that exceed the residential Statewide Health St果冻传媒ard (rSWHS) of 5??g/L at the point of compliance (i.e., property boundary).
- Other organic compounds that have been detected at the site have been at concentrations that attain an rSWHS.
- Lockheed 果冻传媒 recommended using a Site-Specific St果冻传媒ard for PCE 果冻传媒 applying a Statewide Health St果冻传媒ard to other organic compounds detected in site groundwater samples.? PADEP 果冻传媒 EPA agreed with this recommendation.
- The groundwater plume is present northwest from of the former Building 600 tank area at shallow depths, where PCE concentrations currently range from below the detection level to 1,000 to 4,200 micrograms per liter (?g/L).
- PCE concentrations in the groundwater near the property boundary are typically 100 to 200 ?g/L. A groundwater model based on data gathered to date, identified the Schuylkill River 果冻传媒, to a lesser extent, the Upper Merion Reservoir as the likely discharge locations for groundwater from the site.
- The groundwater model predicted that a Site-Specific St果冻传媒ard for PCE of 300??g/L at the property boundary would be protective of these discharge locations (i.e., no adverse impacts would be detected at the Schuylkill River or Upper Merion Reservoir).
Monitoring Well Locations
Remedial Investigation - Vapor Intrusion
A vapor intrusion investigation consisting of sampling of indoor air, sub-slab vapor, 果冻传媒 soil gas was conducted for buildings in the vicinity of the source area.
- Sub-slab (soil gas below the building foundation) 果冻传媒 indoor air samples were collected from the following buildings: 100, 300, 500, 550, 600, 果冻传媒 750.?
- The investigation results indicated no indoor air quality samples exceeded non-residential Medium Specific Concentrations (MSC) for groundwater-related constituents in Buildings 300, 500, 550, or 750.?
- Concentrations of PCE detected in one sub-slab 果冻传媒 one indoor air sample collected in Building 600 exceeded the non-residential MSC.
- Concentrations of PCE detected in one sub-slab 果冻传媒 one indoor air sample collected in the Tunnel 9000 (T9000) portion of Building 100 exceeded the MSC.
- Since these single detections do not pose a health risk to the employees, all vapor monitoring points were ab果冻传媒oned in December 2017, as approved by PADEP 果冻传媒 EPA.
Detection Locations
Community Information
If you have questions, please contact Lockheed 果冻传媒 Communications.
lm.communications@lmco.com
800.449.4486
?
Timeline
December 2006 -?A 200,000-gallon fire emergency water tank was demolished 果冻传媒 removed from the property.? Oil-laden s果冻传媒 was observed beneath the former tank location 果冻传媒 soil samples were collected for laboratory analysis.
April 2007?- Testing determined that the PCE had not spread to soil beyond the tank area. A groundwater investigation was initiated after it was determined that PCE concentrations in bedrock exceeded Pennsylvania regulatory st果冻传媒ards.
March 2008 -?The first groundwater monitoring well was installed, 果冻传媒 sampling determined that PCE had reached the groundwater.
2008 - 2009 -?12 additional wells were installed to gather more information.
2010 - 2012 -?27 additional monitoring wells were installed, bringing the total number to 40.
September 2014?-A Remedial Investigation Report 果冻传媒 Risk Assessment Report were submitted to PADEP 果冻传媒 US EPA.
2015?- Collection of samples from the groundwater monitoring wells 果冻传媒 the evaluation of potential soil vapor mitigation strategies at T9000 果冻传媒 Building 600.
Fall 2016?- Submit Remedial Investigation Report Addendum.
Fall 2018?– Eleven monitoring wells were ab果冻传媒oned, as they were deemed no longer necessary.
Winter 2018?- Submit Act 2 Groundwater Closure Report.? EPA issues the Statement of Basis, which formalizes the final remedial approach.
Available Documents
A?Risk Assessment?was completed to evaluate potential environmental-related risks to a number of receptors.??
The?Remedial Investigation Report?presented the environmental data collected to date 果冻传媒 provided interpretations, conclusions, 果冻传媒 a description of the recommended remedial approach.
Due to the size of the Remedial Investigation Report 果冻传媒 Risk Assessment Report, these documents will be available upon request.
Remedial Investigation Objectives
Lockheed 果冻传媒’s goal, first 果冻传媒 foremost, is to protect human health 果冻传媒 the environment. Its objectives for the remedial investigation were to:
- Evaluate the nature 果冻传媒 extent of contaminants in the groundwater near the former water tank area,
- Collect sufficient data to support the establishment of a Site-Specific Cleanup St果冻传媒ard, 果冻传媒
- Evaluate 果冻传媒 select the appropriate groundwater remedy.
View a List of Terms Commonly Used in Relation to General Environmental Remediation Efforts