SEI was retained to provide technical oversight and coordination for a recharacterization of groundwater flow and hydraulic
containment at the site. This project was managed by the client as a team effort, with frequent meetings with the consultants (SEI,
Conestoga Rovers & Associates, and S.S.Papadopulos & Associates), and regular meetings with the regulatory agencies. This
team effort and close cooperation with the agencies was an effective approach to keeping the project on track and ensuring that the
regulators concerns were incorporated into the site investigations. The investigation was completed in several steps, resulting in a
significant recharacterization of the hydrogeologic conditions in the bedrock, preparation of six major reports, and satisfaction of the
EPA's request for demonstration of hydraulic containment.
Design, Investigation, & Annual Reporting
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Stockton Formation
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Pennsylvania
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EPA CERCLA
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PROJECT DESCRIPTION
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GEOLOGY
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STATE
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AGENCY
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The groundwater remediation system for the Site was designed by Mr. Sayko in 1991 while working with ERM. System startup began
in 1993. Mr. Sayko has completed annual reporting and provided investigation services (well installation, sampling, reporting) since
system startup, and SEI has provided these services since 2002. The remediation system has been in operation since 1993, has
had three EPA 5-year reviews, and continues to operate without any revisions to the original recovery system design.
SEI provides technical support and hydrogeologic analysis of groundwater flow and contaminant transport for a former industrial
facility. The site is impacted by VOC and mercury. SEI developed a site conceptual model, 3-D geologic model, groundwater flow
model, prepares work plans for investigations and the annual performance report, and makes presentations to the regulators.
Expert Testimony
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Atlantic Coastal Plain
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Florida
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SEI provides technical support and hydrogeologic analysis of the NoMound® innovative on-site waste water treatment system.
Expert testimony was required in a permitting dispute with the State of Florida.
Environmental Compliance
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PA / NY / NJ
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SEI provides environmental compliance services to a manufacturing business with facilities in Pennsylvania, New York, and New
Jersey. These services include preparation of State and Federal compliance reports, waste management and minimization support,
and plant inspections.
Independent Peer Review
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Unconsolidated Sediments
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Washington
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EPA CERCLA
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SEI provides independent peer review on a large, 3-dimensional, density-driven flow and transport modeling effort. This complex
model was developed by a large consulting firm. Due to the complexity of the site geologic conditions and of construction a large
density-driven flow model, SEI reviews and provides input to facilitate an optimal solution and regulatory acceptance.
SEI completed site investigations and reporting for this manufacturing plant in southeastern Pennsylvania. The Act 2 reporting and
notifications were completed by SEI. As a result, a release from liability was issued for VOCs in groundwater using the statewide
health standards.
Short project summaries are provided below. Contact us for additional details on any project. It the Project Description is highlighted
blue, there is a link to a detailed project description.
Projects
Act 2 Investigation
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Gneiss
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Pennsylvania
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PADEP
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SEI has developed estimates of past and future VOC plumes in groundwater for an Natural Resource Damages lawsuit. The area of
the VOC plume is used in the calculation of damages. The suit was settled favorable to our client.
Site Investigation
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Atlantic Coastal Plain
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Delaware
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EPA RCRA
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Expert Report Preparation
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Passaic Formation
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New Jersey
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NJDEP
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Site Recharacterization
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Lockport Bedrock
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New York
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EPA RCRA
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