Troy Percival

LNAPL Recovery in an Unconsolidated Aquifer, Delaware — Performs operations and maintenance tasks at a shallow aquifer groundwater depression and LNAPL recovery system at a legacy industrial site. Responsibilities include equipment upkeep, system optimization, LNAPL recovery and thickness measurements, and groundwater elevation measurements.

LNAPL Recovery in a Fractured Rock Aquifer, New Jersey — Performs operations and maintenance tasks at a groundwater depression, groundwater treatment, and LNAPL recovery system at a legacy industrial site. Tasks include equipment upkeep, system adjustments, LNAPL recovery, and sitewide groundwater elevation and LNAPL thickness measurements.

PFAS in Groundwater, Delaware — Supports a state regulatory agency in evaluating the extent and magnitude of PFAS compounds in groundwater associated with wastewater discharge outlets. Responsibilities include groundwater sample collection using volumetric purge methodology and strict adherence to sample handling and QA/QC protocols to meet established data quality objectives.

PFAS in Groundwater, Multiple Sites, New Jersey and Delaware — Conducts groundwater sampling at multiple large-scale sites where PFAS compounds are present. Sample collection includes low-flow purge and volumetric purge methodology, calibration and use of water quality instrumentation, and adherence to sample handling and QA/QC protocols to meet data quality objectives.

Multiple Contaminants in Groundwater, Federal Superfund Site, Bridgeport, New Jersey — Collects groundwater samples at a large-scale federal Superfund site impacted by volatile and semivolatile organic compounds. Sample collection includes low-flow purge methodology, calibration and use of water quality instrumentation, groundwater elevation measurements, and adherence to sample handling and QA/QC protocols to meet data quality objectives.

Multiple Contaminants in Groundwater, Multiple Sites, Pennsylvania, New Jersey, and Delaware — Collects groundwater samples at multiple project sites to monitor the extent and magnitude of contaminant impacts. Sample collection includes low-flow and volumetric purge methodology, calibration and use of water quality instrumentation, groundwater elevation measurements, and adherence to sample handling and QA/QC protocols to meet data quality objectives.

Potable Drinking Water Sampling, School District of Philadelphia, Pennsylvania — Collects water samples from drinking water and food preparation outlets across hundreds of schools and facilities to identify and mitigate lead as a contaminant. Tasks include coordination with school district personnel, water outlet surveys, sample collection, sample handling, and detailed recordkeeping.

Residential Sampling, Superfund Site, Pennsylvania — Collects drinking water samples from residential locations to monitor the effectiveness of point of entry treatment (POET) systems. The POET systems complement a remedial program associated with an adjacent Superfund site.

Superfund Site Maintenance, New Jersey and Pennsylvania — Conducts site condition monitoring and upkeep at multiple Superfund sites. Tasks include vegetation control, signage inspection, and access point security.