• Underground Storage Tank Removal

    Insitu Remediation and Treatment Projects - Remediation of Gasoline (BTEX) contaminated Soil and Groundwater

    Location: Kentucky
    Client: Private

    Chase Environmental Group was contracted for the investigation and remediation of Soil and Groundwater at a gasoline station. A groundwater assessment identified extensive subsurface BTEX contamination in an area immediately adjacent to the UST areas.

    Dual Phase Extraction using Chase's VAMPIRE unit was selected to remediate the groundwater plume. Three 8-hour VAMPIRE™ events were performed resulting in the removal of 57 lbs of BTEX compounds Groundwater sampling and analysis was performed which confirmed the complete removal of the contaminants and a No Further Action letter was issued by the Kentucky UST Branch.

    As can be seen by the graph below, the VAMPIRE acts to concentrate the gasoline compounds and then removes the concentrated compounds.

    Vampire graph

    Project - Remediation of Tetrachloroethylene contaminated Soil and Groundwater

    Location: Kentucky
    Client: Private

    Chase Environmental Group was contracted for the investigation and remediation of Soil and Groundwater at a dry cleaning facility. A groundwater assessment identified extensive subsurface Tetrachloroethylene (TCE) contamination in an area immediately adjacent to the dry cleaning areas.

    The Corrective Action Plan was implemented in two stages:

    Stage 1 Dual Phase Extraction using Chase's VAMPIRE unit. Vacuum Assisted Multi-Phase Remediation Extraction (VAMPIRE®) is an innovative and cost effective remediation method that utilizes high vacuum pressures and flow rates to remove multiple phase (i.e. vapor, adsorbed, dissolved, and free phase) Volatile Organice Compounds (VOCs. )VAMPIRE® simultaneously removes VOCs from both the vadose and saturated zones. The VAMPIRE™ was used to remove the high concentrations of TCE prior to the injection of Hydrogen Releasing Compound (HRC). Three 8-hour VAMPIRE™ events were performed resulting in the removal of 27 lbs of chlorinated compounds.

    After the VAMPIRE event, (HRC) injection was used to complete the degradation of the chlorinated compounds to a acceptable levels. 40 lbs of HRC (Terra Systems product) were injected into 25 locations in the area of the plume.

    Groundwater sampling and analysis was performed which confirmed the complete degradation of the contaminants and a No Further Action letter was issued by the Kentucky Superfund Branch.

    Project - Groundwater Treatment during Stadium Construction

    Location: Kentucky
    Client: Private

    Chase Environmental Group, Inc. was contracted to provide water management service and impacted soil remediation during a stadium expansion project. Chase provided tanks and personnel to transport impacted water to a filter press staged in a remote location.

    The water was first loaded into frac tanks prior to treatment. The water was pumped though a filter press constructed on site. Filter cake from this operation was discharged from the bottom of the unit into a rolloff for transportation to the landfill. From the filter press the water was pumped to a weir tank for any additional solids settling and to visually evaluated the water surface for evidence of petroleum contaminants. The water was discharged to the sewer from the weir tank. Approximately 300,000 gallons of water was treated and discharged. Chase also completed the loading and transporting of over 23,000 tons of impacted soil to a nonhazardous landfill.

    Project - Insitu Bioremediation

    Location: Lexington KY
    Client: Private

    Chase Environmental Group (Chase) was contracted to perform Insitu chemical injection and drilling services in support of remediating a manufacturing site contaminated with Chlorinated solvents.

    Chase provided the following services:

    • Rock coring, fracture delineation through geological core analysis and monitoring well installation prior to design completion;

    • Injection of 2,100 gallons of Regenesis 3-D Microemulsion solution using a CME 75, straddle packer down hole assembly and truck mounted moyno pump for distribution;

    • Injection of 30 liters of Regenesis Bio-Dechlor INOCULUM® Plus using canister pressure and isolated distribution area (defined by the packer assembly) while supported by the CME 75 drilling unit;

    • The 3DME slurries were prepared using Pre-cleaned 500 gallon poly tanks and hand pumps to transfer Microemulsion and CRSsolution into clean potable water. A motor mounted mixer was used to prepare each batch and then injected through a straddle packer assembly into a 2' pre-defined area of the formation. The slurries were installed through this process using a top down injection technique to ensure effective distribution within the subsurface. The bioremediation agents were injected at rates ranging from 5 - 15 gallons/min with pressures ranging from 45 - 200 psi relative to defined formation fractures;.

    • Transducers were placed into adjacent wells during the injection process to monitor the relative barometric pressure variances confirming influence of the effected well network. In addition, visual monitoring of all wells was performed to include hourly water level measurements and YSI recordings when applicable.

    • Depth of injection for this site ranged from 20' to 40' bgs based on delineated fractured intervals pre-defined by our client and was completed within a 7 day time period.

    • The facility is currently awaiting final regulatory decision from the KY Division of Waste Management.

    Project - Bioremediation of former gas station

    Location: Springfield KY
    Client: Private

    Chase Environmental Group (Chase) was contracted to perform the remediation of a former underground storage tank site. The site had been contaminated with gasoline constituents (benzene, toluene, ethyl benzene and xylene).

    Chase provided the following services:

    • Injection of 7,500 gallons of BOS 200 solution (manufactured by RPI) using 410 injection points installed by a direct push unit at depths between ten and twenty feet.

    • The BOS slurries were prepared using Chase's trailer mounted mixing and injection system. The slurries were installed through Geoprobe® rods using a top down injection technique to ensure effective distribution within the subsurface. Typical injection rates were 30 gpm at 200 psi.

    • Sampling and analysis to provide confirmation of remediation.

    • Final reporting

    The facility is currently awaiting final regulatory decision from the KY Division of Waste Management.

    Contact us to see how we can be of service to you, email: Chase Environmental Group or call toll free: 877-234-5687.