Sara S. Redding, MS, PG, LSRP

Principal Hydrogeologist



Site Assessment, Investigation, and Remediation

Property Transfer Support and Due Diligence

Hydrogeology/Complex Bedrock Investigations

Maximizing Use of Current and Historical Data for Compliance with Current Regulatory Requirements

Cost Allocation Between Time Periods, Parties, and/or Sources of Contamination


‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬MSc, Geological Sciences, University of Oregon

ScB Geology - Math/Physics, Brown University

Sara S. Redding, MS, PG, LSRP

Principal Hydrogeologist

Mrs. Redding is a New Jersey Licensed Site Remediation Professional (LSRP) and Pennsylvania Professional Geologist (PG). She holds a BS in Geology – Math/Physics from Brown University and a MSc in Geological Sciences from the University of Oregon. Mrs. Redding has extensive experience in environmental remediation, characterization, and remediation of petroleum, chlorinated solvents, polycyclic aromatic hydrocarbons (PAHs), metals, light and dense non-aqueous phase liquid (LNAPL and DNAPL), as well as assessment of vapor intrusion conditions and emerging contaminants (i.e., PFAS, 1,4-dioxane). She has conducted, managed, or overseen numerous investigations and remediations for a variety of state and federal programs, including Pennsylvania with Act 2 and Hazardous Sites Cleanup Act (HSCA) projects, as well as New Jersey Industrial Site Recovery Act (ISRA) and Spill Act. In addition to design and implementation of environmental investigation and remediation, Ms. Redding has experience with environmental forensics, fingerprinting, apportionment, cost-to-closure estimates, and third-party review.


Mrs. Redding specializes in navigating the ISRA process, management of sites with complex hydrogeologic settings including multi-aquifer systems and fractured bedrock, and management of sites with complex data management and data evaluation needs. She supports due diligence efforts in multiple states including New Jersey and Pennsylvania. Additionally, Mrs. Redding leads the Geographic Information System (GIS) and Database department for Roux’s New Jersey operations.

representative projects
  • LSRP for portfolio of manufacturing sites throughout central and northern New Jersey regulated under ISRA. Responsible for completing General Information Notice (GIN), Remediation Certification (RC), Initial Remediation Funding Source (RFS) forms, Preliminary Assessment (PA), and Site Investigation (SI) with Receptor Evaluation (RE) as applicable for each site within regulatory timeframes. Individual site complexity factors include, but are not limited to, active ISRA spill cases, Remedial Action Permits (RAPs) related to prior owners and/or operators, access coordination challenges, extensive prior historical investigation, proximity to local superfund contamination, coordination with New Jersey Department of Environmental Protection (NJDEP) related to establishment or merger of program interest numbers based on available tax information, successful application for regulatory timeframe extension due to access-related delays, and considerations for leasehold versus entire site ISRA industrial establishments.
  • LSRP/Project Manager for a former research and design testing site in central New Jersey regulated under ISRA. Project responsibilities include implementation of management of soil, sediment, and surface water investigations with an Ecological Risk Assessment (ERA) component to delineate the extent of semi-volatile organic compounds (SVOCs) and metals for active remediation. Activities managed at the Site included extensive soil investigation in support of both delineation and Historic Fill determination, preparation of an ERA report, remedial design, and complex permitting requirements due to proximity to the Delaware and Raritan Canal. Responsibilities included participation in client and regulatory agency meetings; design of soil boring and monitoring well installation program to address long history of investigation and for compliance with evolving regulatory requirements; preparation of key phase deliverables necessary to meet the regulatory timeframes and support remedial design; management of remedial timeframes and successful application for extensions to regulatory and mandatory timeframes; and  management of complex permitting requirements (i.e., New Jersey Right-of-Entry, New Jersey Division of Land Use Regulation, US Army Corps of Engineers, Delaware & Raritan Canal Commission, State Historic Preservation Office, Soil Conservation District). Remedial activities included remediation of the Site soil and sediment via bank stabilization and excavation where materials were subject to off-site disposal and use as alternative fill, capping, institutional control (i.e., Deed Notice), and application for Remedial Action Permit (RAP) for soil.
  • Project Manager for a former industrial manufacturing site in central New Jersey regulated under ISRA. Project responsibilities include coordination and management of soil, sediment, surface water, and groundwater investigations to delineate the extent of chlorinated VOCs (primarily PCE and TCE); and remediation of impacted soil. Field activities implemented or overseen at this Site included installation and sampling of bedrock and overburden monitoring wells, groundwater sampling, long-term groundwater monitoring, short-term aquifer testing, long-term groundwater elevation monitoring, installation of GORE (now AGI) vapor modules, extensive installation of soil borings and soil sampling/delineation, remediation of impacted soil using excavation methods, vapor intrusion sampling, and long-term groundwater monitoring in support of a Monitored Natural Attenuation (MNA) remedy for groundwater. Complexity factors include extensive tabulation of historical documents, groundwater contamination in fracture bedrock system, and NJDEP technical consultation for variance to delineation requirements due to physical access considerations. This Site received full soil closure and is currently undergoing post-remediation sampling to support groundwater closure.
  • Project manager for remedial investigation of soil, groundwater, vapor intrusion (VI), surface water, and sediment at a former stainless steel tubing manufacturing facility located in Southeast Pennsylvania (the Site is managed under the HSCA by the Environmental Cleanup Program). The investigation focused on the vertical and horizontal delineation of chlorinated solvents in overburden and bedrock. Investigation activities included the installation of shallow overburden and deep (~400 feet) nested bedrock monitoring wells using sonic drilling techniques to reduce the amount of investigative derived waste (IDW) generated. The use of sonic drilling techniques resulted in cost savings for the client. Additional activities included management of over 30 years of laboratory analytical data; geophysical and packer testing of open boreholes to determine well screen intervals; slug testing; installation of GORE (now AGI) vapor modules; indoor air sampling; VI assessment using United States Environmental Protection Agency (USEPA) risk calculator; assessment of surface water and sediment in a local tributary for both human health and ecological risk considerations; assessment of potential groundwater diffuse discharge and point-source discharges to this tributary; on-site soil investigation; bacterial sampling; treatability study long-term parameter monitoring; long-term groundwater elevation monitoring; DNAPL investigation; Passive Diffusion Bag (PDB) groundwater sampling; and groundwater sampling for volatile organics, metals, 1,4-dioxane, and PFAS,  as well as monitored natural attenuation indicator parameters and compound-specific isotope analysis (CSIA) parameters. Activities were summarized in a comprehensive remedial investigation report (RIR) and supplemental RIR covering an investigation period of over 30 years; a Treatability Study Completion Report discussing the effectiveness of molasses injections for addressing overburden and deep bedrock groundwater contamination; and a Feasibility Study (FS) Report assessing multiple assembled integrated remedial alternatives including ISCO and ISCR injections, hydraulic control, and best management practices. This project included regular communications with the PADEP by way of progress reports, response letters, data memorandums, reports, participation in public meetings, and sharing of data.
  • Project manager for multiple industrial facilities in New Jersey regulated under ISRA with potential per- and poly-fluorinated substances (PFAS) usage and/or discharge of Aqueous Film Forming Foam (AFFF). Responsibilities include design and implementation of PFAS investigation in soil and groundwater compliant with evolving regulatory requirements. Additional complexity factors for these sites have included an adjacent water body classified as both freshwater non-trout (FW2-NT) and saline (SE2), proximate potential alternate sources of PFAS and corresponding forensic analysis of site conditions, and physical access constraints.
  • Boudreau, L., Wiest, M., Redding, S. “Why New Phase I Site Standard Matters for Real Estate” Law 360, Dec. 2021.

  • Boudreau, L., Wiest, M., Redding, S. “Enviro Review Standard Tweaks May Clarify Cleanup Liability” Law 360, Oct. 2021.

  • Papamarcos, S., “A Model of Basal Hydrologic Networks and Effective Stress Beneath an Ice Sheet” (Thesis). University of Oregon, Mar. 2012.