The hydrological situation is changing. Are you considering remediation strategies with respect to sea-level rise, which could affect groundwater on the site?

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Evergreen will detail its approach to remediation of the facility in future Cleanup Plans and will consider climate changes predicted to occur within the anticipated timeframe to completion. Evergreen will also incorporate climate change into future modeling. Response addresses the similar questions: "Are you considering your remediation strategies with respect to sea level rise, which could affect groundwater and... read more

Evergreen’s answer on the website to the question of whether climate change will be incorporated in the groundwater modeling states, “the boundary condition data variability must be quantifiable and based on accepted models or observations.” What in plain language does this response mean? You have not directly answered the question. What efforts are being made to quantify the boundary condition data? Are accepted models available or not? If not, why not?

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Evergreen plans to evaluate climate change data in support of groundwater modeling for contaminant fate and transport. The effort will include a review of available literature on climate change predictions for the Philadelphia region. Accepted climate models would be those that are published, peer-reviewed, and/or otherwise viewed as reliable and relevant to future conditions at the facility. Quantifiable refers to... read more

Why is there no mention of climate change in discussion of the Water-table aquifer? These levels could change by multiple feet in the next few decades.

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One of Evergreen’s primary objectives through the remedial investigations under Act 2 was to characterize the facility’s geologic framework and the water-bearing units it supports. Potential flow pathways for contaminant transport could be evaluated in this manner using recent groundwater observations from hundreds of wells at the facility. Evergreen’s groundwater model is calibrated and validated to these... read more

Can you please go over your plan to clean up lead and other toxic contaminants at the site? And your plan to provide a sufficient analysis of and a plan for effectively and safely cleaning up contaminants in the deep aquifer below the site. I urge you to use the strictest possible health-based standard to clean up toxics in both of these and all other cases.

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All plans for cleaning up contamination in both soil and groundwater will be included in the Act 2 Cleanup... read more

How long will this take and when will the cleanup start?

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Evergreen’s cleanup, when talking about subsurface remediation (extraction of petroleum and impacted groundwater from the subsurface), has been ongoing for quite some time and is expected to continue for several years until removal of petroleum and impacted groundwater is no longer necessary). The need for any additional remediation systems to address pre-2012 impacts will be detailed in future Act 2 Cleanup... read more

It seems like many of the RIRs are still pending despite Hilco’s plans to start construction in 2021. 1) What AOIs are planned to be clear to build in 2021 and 2) what are the states of their RIR and Remedial Action Reports such that building can occur so soon. 3)If they are starting in the North, AOI 8 has an identified benzene plume that exceeds the site boundary to the north. There is a sample point in the lower aquifer on the boundary that is outside of the active and inactive remediation boundaries. What are the remediation activities that need to be done prior to construction to address these needs?

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Hilco Redevelopment Partners’ construction schedule is not dependent on completion of Evergreen’s remediation activities.  Operation of Evergreen’s remediation systems in the North Yard (AOI 8) and in other areas of the site will continue during and after Hilco Redevelopment Partners’ decommissioning, demolition, and redevelopment activities. Hilco Redevelopment Partners and Evergreen have been and will... read more

In today’s presentation, the presenter described the topic of “source removal” as a remediation approach, summarizing it as “get rid of it.” It is understood that this is a plain-word explanation for a more involved process. What percentage of this project is proposed to be source removal, and where is the material to be removed going? What is the line of custody for such removal, at what stage are the applicable permits? Are the byproducts of such processes contaminants themselves, and does the proposal comply with regulations and standards for such byproducts?

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These are all questions that are generally addressed in a Cleanup Plan.  The Cleanup Plan(s) will be submitted subsequent to Remedial Investigation... read more

How can you tell whose benzene is whose?

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In general, where there are potentially off-site and/or on-site sources that may explain the presence of benzene, factors such as the respective products used at a site, release history and/or environmental conditions – such as geology and hydrogeology, which govern how those products behave in the subsurface - may assist in identifying a source. Where different releases on-site may explain the presence of... read more