Response & Remediation


What WE Do

At TGS, we specialize in swift and effective environmental response and remediation solutions. When unexpected challenges arise, our expert team mobilizes to address contamination, hazardous materials, and ecological restoration. Whether it’s soil remediation or groundwater cleanup, we are committed to restoring balance to our natural environment in an expediate and cost-effective manner.


Spill Response & Oversight


Saddle Tank Spills


Leaking Storage Tanks


Soil Excavation


In-Situ Groundwater Treatment


Innovative Treatment Technologies

Case Studies.

Case studies

Toluene Tanker Truck Accident, Response and Remediation

Western Pennsylvania

On behalf of our client, Taylor GeoServices responded to a release of a hazardous substance that occurred because of a tractor trailer tanker accident. The incident occurred on a Pennsylvania interstate highway when the driver of the tractor trailer tanker involved suffered a medical emergency, the vehicle veered off the highway, over an embankment and ruptured the tanker. More than 4,000 gallons of toluene was released at the accident site. Emergency response personnel responded and recovered an initial 2,000 gallons, however, approximately 2,400 gallons of toluene were lost to the environment. The released toluene infiltrated directly into the ground at the release point, migrated through the soil fill material of the highway embankment, and discharged to a local tributary of the Youghiogheny River. Within 24 hours of the accident, significant efforts were employed by multiple contractors to contain the toluene. These included the construction of a temporary bridge across the creek to access the spill area, the installation of a cut off trench at the base of the embankment to intercept the toluene prior to entering the creek, mobilization of specialized remedial equipment, drilling of test borings to identify the extent of impacts in the subsurface the removal an containerization of impacted soil material and securing the required emergency permits from the Pennsylvania Department of Environmental Protection (PADEP), and site access agreements from the property owners and the Pennsylvania Department of Transportation (PENNDOT).

Once the initial response had effectively contained the situation, the task of characterizing and remediating the residual toluene began. The contamination extent was identified. A biological assessment of the creek ecosystem was completed. Soil remediation using soil vapor extraction (SVE) and excavation technologies were employed. Ultimately a Release from Liability Under the PADEP’s Act 2 Land Recycling Program was obtained.

TGS was instrumental in the rapid and successful handling of the massive undertaking. Our personnel oversaw the emergency response, completed extensive characterization and remedial efforts, interacted with, and acted as client liaison with PADEP, PENNDOT, the Pennsylvania Fish and Boat Commission, and Pennsylvania Emergency Management Agency (PEMA).

Soil and Groundwater Remediation for a
Real Estate Transaction



Concentrations of gasoline constituents, benzene, toluene, ethylbenzene, and total xylenes (BTEX) were identified in the soil and groundwater originating from a leaking fuel oil tank. The historic contamination was preventing the pending sale of the property. Approximately 100 tons of contaminated soil was excavated and incinerated at an off-site asphalt recycling facility. To address the contaminated groundwater and obtain Pennsylvania Department of Environmental Protection (PADEP) closure, an in-situ bioremediation was designed and implemented. Within three months of initiating the bioremediation BTEX concentrations in the groundwater were below laboratory detection limits. PADEP closure was obtained, and the sale proceeded.

Chemical Oxidation & Bioremediation
for Shallow Groundwater Contamination


Four leaking gasoline underground storage tanks (LUSTs) and impacted soil had been removed from a former automobile dealership. However, three years after removing the tanks there had been no progress in the remediation of the property. Persistent concentrations of BTEX in the groundwater prevented the pending sale of the property. TGS was hired and after reviewing the existing information and conducting a supplemental pilot study, an in-situ interceptor trench using chemical oxidation and bioremediation additives was designed and implemented. Within the first month of remediation, BTEX concentrations were within acceptable levels for closure and a “No Further Action” letter was obtained from the state regulator.

Groundwater Remediation at an Automobile Garage –
Managing Cleanup Costs


An automotive repair facility had a leaking underground storage tank on the property. The extent of the groundwater contamination was minimal and there was no imminent threat to human health or the environment. The client planned to continue operating the property and wished to manage cleanup costs over time. Therefore, a combination of both active and passive remediation objectives was planned. Initial in-situ bioremediation injections were used to reduce a large percentage of contaminant mass. The remaining concentrations were then allowed to mitigate through natural attenuation processes. A simple fate and transport evaluation was completed to demonstrate that the remaining residual concentrations of benzene around the source area would not migrate to the property line above the State’s cleanup standard. Attainment of the groundwater Statewide Health Standard was demonstrated, and an Act 2 release of liability was provided to the property owner.


Latitude: 39° 59.06'N
Longitude: 75° 24.23'W
Elevation: 380+/- feet msl

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