Site Investigation & Corrective Action

Blackshare Environmental conducted an investigation of the subsurface beneath two concrete transformer pads where PCB laden dieletric fluid had leaked over a substantial period of time. Using direct push technology to delineate the PCB contamination, our team discovered elevated levels of PCBs at depths up to five feet. The concrete pads were removed and disposed of as PCB contaminated waste. An excavation plan was developed based on the subsurface investigation and a grid pattern was established for the initial excavation and removal of contaminated soil.

Blackshare Environmental completed investigation of three separate sites where waste from the routine demolition of glass furnaces was illegally dumped. The material consisted mainly of fire brick, glass cullet and silica sand. Upon discovery of the sites, the ODEQ issued Notice of Violation (NOV) to both the waste generator and the disposal contractor who actually dumped the waste. The ODEQ required full characterization of each of the sites.

Blackshare Environmental was contracted by a large manufacturing company to operate and maintain the operation and maintenance of a groundwater recovery and treatment system. The treatment system was installed to remediate a plume of dissolved-phase aromatic and chlorinated hydrocarbons which resulted from two leaking underground storage tanks. Over twenty monitor/recovery wells have been installed and the treatment uses soil vapor extraction and aquifer air sparging technology.

Complaining of natural gas accumulating around the foundation of his house, a Tulsa homeowner engaged Blackshare Environmental to disperse the gas and locate its source. Blackshare designed and installed a collection system which consisted of a series of buried collection pipes and a blower which safely vented the gas above the roof line. We then assisted in locating the natural gas source, which turned out to be an unplugged gas well. The well was plugged and the source was eliminated.

Blackshare Environmental routinely conducts investigations of subsurface hydrocarbon contamination, usually resulting from USTs, for the Oklahoma Corporation Commission and/or municipalities. These investigations are often done as part of larger road construction widening projects.

Mercury Cleanup

A pipeline company discovered a gasoline release at its Glenpool,OK storage terminal near Tulsa. The initial site investigation confirmed that subsurface soil and groundwater near the point of release were affected by petroleum products. A series of geoprobe borings located and delineated the gasoline plume. Free product ranging in thickness from a sheen on the water to over two inches was recorded in twenty-one of the borings.