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Anthony J. Shields, P.E.

Anthony J. Shields, P.E.
Senior Engineer

Anthony J. Shields, P.E.

Senior Engineer

Mr. Anthony Shields is a registered professional engineer with 9 years of experience in environmental engineering and consulting.  Mr. Shields specializes in remediation and design and has experience remediating emerging contaminants such as per- and polyfluoroalkyl substances (PFAS), 1,2,3-trichloropropane (1,2,3-TCP), and 1,4-dioxane.  He has additional experience in public supply drinking water treatment, remedial investigations, cost estimation, air compliance permitting, and stormwater management. He has provided engineering support for the design, construction, and operation of a wide variety of treatment systems and technologies, including thermal remediation, sorption technologi...

Mr. Anthony Shields is a registered professional engineer with 9 years of experience in environmental engineering and consulting.  Mr. Shields specializes in remediation and design and has experience remediating emerging contaminants such as per- and polyfluoroalkyl substances (PFAS), 1,2,3-trichloropropane (1,2,3-TCP), and 1,4-dioxane.  He has additional experience in public supply drinking water treatment, remedial investigations, cost estimation, air compliance permitting, and stormwater management. He has provided engineering support for the design, construction, and operation of a wide variety of treatment systems and technologies, including thermal remediation, sorption technologies, bioremediation systems, soil vapor extraction and air sparge systems, engineered capping, in situ chemical oxidation (ISCO) injections, sub-slab depressurization (SSD) systems, in situ stabilization (ISS), and excavation and disposal.

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PFAS/Emerging Contaminants

PFAS Source Area Remediation for a Large Industrial Plant, New Jersey Provided engineering support for a major industrial plant and PFAS user to select interim remedial measures for source control purposes for highly impacted soils containing parts per million concentrations of legacy PFAS and replacement chemistry PFAS.  Work involved evaluating remedial alternatives and conducting bench-scale studies of multiple remedial technologies, including thermal conductive heating of soils; thermal smoldering of sludge materials; in situ soil stabilization and solidification; and injectable colloidal activated carbon for groundwater treatment.  Bench studies were conducted to both evaluate site-specific conductions and to evaluate previously proven technologies to remove novel PFAS compounds unique to the facility.
PFAS Remediation of Public Water Supply Wells Impacted by a Large Industrial Plant, New Jersey Provided investigation and engineering support for nearly 40 public water supply (PWS) wells spread across 10 different municipalities, which were potentially impacted by a 3-mile long PFAS plume downgradient from a major industrial plant and PFAS user.  Conducted engineering analyses for multiple wellhead treatment systems comprising both anion exchange resin and granular activated carbon (GAC) trains installed for PFAS treatment.  Provided litigation support to determine the extent of impacted PWS wells, prepare for potential third party investigations, and create cost evaluations for additional treatment systems.  Additional work included the evaluation of replacing impacted wells with deep aquifer wells and permitting for new well installation and water allocation.
Engineering Design of a 2.6+ MGD Pump and Treat Facility for PFAS-Impacted Groundwater for a Large Industrial Plant, New Jersey Providing ongoing support and engineering design for a groundwater pump and treat system to capture and contain a multimile groundwater plume impacting a potable aquifer.  Preliminary design work includes a system with an average treatment rate of 2.6+ million gallons per day (MGD), utilizing multiple water treatment techniques to address both PFAS contamination and provide pretreatment to achieve relevant groundwater quality goals.  The centralized system will include precipitation of dissolved iron, scaling and pH control, 1,4-dioxane treatment via peroxide and ultraviolet light, and granular activated carbon and anion exchange resin treatment trains for PFAS removal.  Ongoing work involves engineering support for the siting of extraction and injection wells and other treatment apparatus, extensive permitting support with state and local regulators, and regular groundwater investigation work.
Multi-media PFAS Remedial Investigation for a Large Industrial Plant, New Jersey Conducted ongoing remedial investigation activities for a major industrial plant and PFAS user to investigate multiple impacted media, including soil, groundwater, air, sediment, porewater, stormwater, and surface water.  Activities include the delineation of a PFAS-plume across a multiaquifer groundwater network, response to immediate environmental concern conditions associated with private and public water wells, and stormwater investigations and related discharges to surface water and other potential receptors.
PFAS and Sulfolane Investigation and Remedial Alternatives Assessment, Fairbanks North Star Borough, Alaska Provided engineering support for the investigation of legacy PFAS and sulfolane in groundwater beneath a petroleum bulk storage facility and offsite within a potentially potable aquifer.  Facility had historical discharges of aqueous film-forming foam as part of incident response and response training activities.  Additional work involved conducting a remedial alternatives assessment for potential remedies of onsite PFAS and sulfolane impacts, including the use of soil washing, capping and containment, thermal remediation, and colloidal activated carbon.    
Litigation Support for PFAS-Related Potable Water Treatment Claims, South Dakota Provided engineering review and cost estimating for proposed alternatives to address PFAS impacts in a public water supply above EPA health advisory levels from source ground- and associated surface waters.  A municipal system providing nearly 22 MGD of water required cost estimation and alternatives evaluation for wells impacted with PFAS located near the city fire training facility and airport. Proposed alternatives included the installation of supplementary 3.6 MGD water treatment plant using granular activated carbon/anion exchange to treat only the wells impacted in order to reduce unnecessary costs and maintenance.  Project work included design of the proposed treatment systems and probable cost estimating for the proposed alternatives. Work conducted in support of approaching litigation and expert report.
Litigation Support for PFAS-Related Potable Water Treatment Claims, Middlesex County, New Jersey Provided engineering review and cost estimating for a proposed 10 MGD public water treatment plant expansion. Proposed expansion was under way to address PFAS impacts above New Jersey drinking water maximum contaminant levels from source groundwater. Project work required engineering review of opposing party’s proposed treatment plant design, design of a granular activated carbon treatment system, and probable cost estimating for the expansion. Work was conducted in support of approaching litigation and expert report for probable cost estimate.
Litigation Support for PFAS-Related Potable Water Treatment Claims, Floyd County, Georgia Provided engineering review and cost estimating for proposed alternatives to address PFAS impacts in a public water supply above EPA health advisory levels from source surface waters. Proposed alternatives included 24 and 30 MGD water treatment plant expansions using granular activated carbon, and relocating the supply intake to an alternative surface water source located approximately 1.6 miles away. Project work included design of granular activated carbon treatment systems, design of alternative water source pumphouse and associated conveyance system, and probable cost estimating for the proposed alternatives. Work conducted in support of approaching litigation and expert report for probable cost estimates.
Litigation Support for Potable Water Treatment Claims, San Bernardino and Stanislaus Counties, California Conducted engineering design and cost estimation for wellhead treatment to address the presence of 1,2,3-TCP in potable water supply systems. Work included evaluation of municipal supply wells for treatment, design of granular activated carbon treatment systems and associated infrastructure, and generation of cost opinions for litigation support.

Remedial Design

Investigation and Remediation of Former Wood Treating Facility, Darby, Montana Provided engineering and investigation support for ongoing remediation of site soil and groundwater impacted with dioxins, furans, and PAHs. Conducted fate and transport modeling under a Montana Department of Environmental Quality-required feasibility study to determine site-specific remedial goals for surface and subsurface soils. Also coordinated pilot-scale studies of multiple stabilization mixes (cement, soil, and bentonite) intended for future ISS of impacted site soils.
Remedial Alternatives Analysis of Former Wood Treating Facility and DNAPL Impacts, Kansas City, Missouri Performed a remedial alternatives analysis for the remediation of soil and groundwater impacts associated with a former wood treating facility. Alternatives were designed to take into account limited funding available through the site’s fiduciary trust, as well as technical considerations such as the presence of immobile dense, nonaqueous-phase liquid (DNAPL) to depths exceeding 85 ft below grade, heterogeneous clay and soil layers, and surrounding surface water and infrastructure features bordering the property. Additional activities included conducting a remedial process optimization of the existing onsite treatment system, which included an aging pump-and-treat system and associated infrastructure.
Chlorinated Volatile Organic Compounds In Situ Biological Remediation and Vapor Intrusion for EPA Superfund Site, Southeastern Pennsylvania Served as the field and project engineer for the remediation of a former door piston and specialty parts manufacturer. Chlorinated solvents previously used for parts manufacturing and testing had contaminated soils and groundwater in both the overburden and bedrock. In addition, chlorinated volatile organic compounds present at the site are part of a co-mingled plume of solvents. Assisted in the implementation of bioremediation via in situ bioaugmentation at the source area of the site. Served as project engineer for the post-injection groundwater monitoring events and provided engineering support for the evaluation of the pilot-study. Also provided engineering support for the determination of indoor air intrusion and potential mitigation alternatives.
Dissolved Oxygen Injection System Design and Installation, Edison, New Jersey Served as field engineer for the installation of a dissolved oxygen in situ treatment system for the remediation of a petroleum/hydrocarbon release associated with a former bus garage and gas station. Leaking underground storage tanks (USTs) and other sources impacted soil and groundwater, with a groundwater plume extending more than 10 acres from the source area. Performed field oversight of the pilot system in the source area, which included the use of pneumatic fracturing and sand proppant to increase injection point area of influence. Assisted in design and installation for the full-scale system following the pilot study. Installed additional injection points throughout the property using pneumatic fracturing, as well as installing an offsite groundwater capture system for downgradient plume remediation.
ISCO Injection Implementation for Former UST Spill, Bridgeton, New Jersey Project engineer for the implementation of ISCO injections to address hydrocarbon contamination in soil and groundwater from former petroleum USTs. Remedial activities consisted of gravity-fed injections of percarbonate oxidant (RegenOx®) into the subsurface to mitigate soil and groundwater contaminated with benzene, toluene, ethylbenzene, and xylenes. Additional injection support included the submittal of the New Jersey Department of Environmental Protection (NJDEP) Permit-by-Rule and implementation of associated groundwater monitoring plan. Treatment is ongoing, and the site is anticipated to move to use of institutional controls (deed restriction) for soils and monitored natural attenuation for groundwater.
SSD System Design, Installation, and Operation and Maintenance, Millville, New Jersey Project engineer for the installation of an SSD system to remediate trichloroethene (TCE) intrusion into an airport hangar and associated pilots’ offices/lounge areas. Assisted in the review of historical investigations and conducted additional sampling/delineation. Provided support for the design and coordination of the installation of the SSD system following increased occupation of the impacted building. Conducted/coordinated confirmatory sampling and system operation and maintenance in accordance with NJDEP vapor intrusion technical guidance. Assisted in the drafting of NJDEP deliverables including the vapor intrusion response action report.
Excavation and Capping of a Former Specialty Gas Manufacturing Plant, East Rutherford, New Jersey Provided field engineering support for an Industrial Site Recovery Act trigger of a specialty gas manufacturing facility. Historical fill throughout the site exceeded non-residential direct contact soil remediation standards while historical process operations leaked chlorinated solvents (tetrachloroethene [PCE]/TCE) as DNAPL below the water table. Oversaw the excavation of hazardous impacted material in two zones of 10 and 20 ft below ground surface, requiring extensive dewatering activities and shoring/sheeting. Preparation work included demolition and asbestos abatement of the site structures. Following excavation and disposal, oversaw the installation of a site-wide permeable stone cap.
Industrial Facility Remedial Excavation, Edison, New Jersey Performed field engineering support for the excavation activities at a former plastic manufacturer to remove soil impacted with multiple chlorinated solvents, including 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1 dichloroethane, 1,1-dichloroethene, 1,2-dichloroethane, methylene chloride, PCE, and TCE. Excavation activities included foundation support utilizing helical piles for the warehouse building, which remained active during the remedial activities. The 12-ft-deep excavation yielded 810 tons of impacted soil for offsite disposal. Following the source removal, provided groundwater monitoring and support for the submittal of a Classification Exception Area.
Former Manufactured Gas Plant ISS and Sediment Dredging Design, Coastal New Jersey Served as field engineer and performed engineering support for the remediation of a former manufactured gas plant located in a coastal town in southern New Jersey. Remedial activities included the implementation of a deep soil mix in situ solidification/stabilization remedy to treat coal tar DNAPL adjacent to the bay side of the town. Provided oversight support of Phase I ISS activities, including the restoration of a public roadway, sidewalks, and utilities. Provided engineering support and technical drafting for remediation/dredging of the bay area’s sediment exceedances. Also provided engineering support for the removal of previously undocumented USTs discovered during the implementation of the Phase I ISS work. Conducted compliance permitting for dewatering water treatment plant, including New Jersey Pollutant Discharge Elimination System and local Municipal Utilities Authority permitting.
Remedial Investigation and Remedial Action Design at a Former Aviation Equipment Facility and Associated Airport, Millville, New Jersey Provided engineering design of a three phase remedial action to address impact to groundwater from concentrations of PCE. Remedial phases included a shallow hot-spot excavation, targeted vadose zone soil vapor extraction systems, and a site-wide volatile organic compound cap. Supported additional groundwater remedial activities, including improvement and optimization of the existing groundwater ex situ treatment network and targeted ISCO injections within the source area and plume. Also performed initial investigation activities, including groundwater monitoring, soil delineation, sediment sampling, indoor air sampling, and operation/evaluation of an existing ex situ groundwater treatment system.
Brownfield Program Property Development, Brooklyn, New York Supported the transaction of a property and application into the New York State Brownfield Cleanup Program (NYSBCP). The property contained chlorinated volatile organic compounds associated with former dry cleaning and painting operations at the site. Helped to provide the buyer’s team with a complete understanding of the site’s environmental history and the process of entering into the NYSBCP, and to prepare the site for ongoing remedial investigation and remediation.

Planning and Permitting

Air Permitting and Compliance for Non-Title V Facilities, Various Locations, New Jersey Provided air permitting, calculations, and support for various Non-Title V facilities located throughout New Jersey, including a commercial vehicle distribution center, a vehicle painting and training center, a commercial wood painting facility, and a residential apartment complex. Engineering support included compliance work for NJDEP and various air permitting programs, including pre-construction permitting, general permits, emission statements, and Construction, Repair, and Maintenance Notifications. Also, performed facility-wide potential-to-emit calculations and calculated various facility inventory emissions, including boilers, above- and underground storage tanks, emergency generators, heaters, and painting booths.

Stormwater Management

Stormwater Infiltration Improvements Design and Oversight for EPA Superfund Site, Southern New Jersey Provided full-time oversight as the resident engineer for stormwater infiltration improvements at a former tannery and drum disposal facility. Remedial work from a previous consultant placed over-compacted backfill resulting in significant ponding and stormwater retention and flooding on the property, halting final installation of the remedial protective soil cap. Supported design work to implement stormwater management best management practices via a blended sand/site-soil mixture with a gravel surface layer to increase stormwater storage capacity and facilitate site infiltration. Provided onsite, day-to-day engineering support for the successful implementation of the redesigned cap and provided faster decision-making abilities for the construction management team.
Return Water Management System Design and Implementation at Former Sand Quarry, Sewell, New Jersey Provided engineering support for the installation of a return water management system to renovate and repurpose the existing dewatering system. The former sand quarry was repurposed for research by a local university because the exposed soils were found to be of significant paleontological importance. Active paleontological research and digging is currently being performed at the site, and a new sustainable dewatering system of the quarry pit was necessary for long-term use. Provided design and engineering support to implement the 200,000–300,000 gal/day return water management system, which utilized sustainable design strategies and best management practices to pretreat the water to adjust pH and total suspended solids and discharge to a nearby surface water feature. Provided design drawings and technical specifications for the various engineered systems, including the lift station, force water mains, duplex pump system, valves and piping, electrical systems, and the gravel infiltration gallery.
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