1930 Hi Line Drive, Dallas, TX 75207
Affected Property Assessment, design and implementation of response action, reporting and documentation to support a Texas Voluntary Cleanup Program Certificate of Closure
Feizy Properties owned a warehouse building in the Design District in Dallas, Texas. InControl Technologies was retained by Feizy after a failed real estate transaction due to significant soil and groundwater contamination from a previous electronic manufacturing operation on the subject property. InControl assisted Feizy in enrolling the site into the Texas Voluntary Cleanup Program. We conducted the Affected Property Assessment and evaluated potential ecological impacts to a neighboring creek. The site had several sensitive receptors: onsite workers due to inhalation exposures, the Trinity River due to groundwater communication with one of its tributaries, an offsite green space, and a hike and bike trail.
InControl designed and developed the Response Action Plan for a groundwater remediation system. The innovative plan included a dual phase high vacuum groundwater extraction system in conjunction with a low-profile air stripper and activated carbon to treat the recovered groundwater. Our in-house professionals evaluated the complexity of the geology adjacent to the Trinity River Basin to accurately construct the groundwater recovery program. The transmissive unit included two different zones of varying permeability. InControl designed a two-tier groundwater extraction system to create a hydraulic barrier for contaminant transport; this system prevented site chemicals of concern from entering the surface water. Then, InControl implemented a sub-slab depressurization system using a modified soil vapor extraction system to prevent indoor air exposure to chlorinated solvents in soil and groundwater. The depressurization system was installed in the identified source area inside the active warehouse. The depressurization system included a series of shallow vapor wells installed inside of the building that were plumbed into a Rotron Blower outside of the building. Additionally, activated carbon was used to treat the extracted vapors.
We developed a remote telemetry system which was programmed to monitor the system offsite. We performed weekly operation and maintenance of all equipment and routinely collected the O&M samples.
InControl established a closure strategy to foster redevelopment of the property; and, we negotiated these terms with the TCEQ to expedite closure for future development. The site successfully received a conditional closure certificate in August 2015. InControl continues to perform post closure care for the facility.