Voids

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LOCATING SUBSURFACE VOIDS

Electric Resistivity survey to locate an abandoned coal mine shaft on a development property in Washington State.

Electric resistivity survey locating air filled voids and saturated fractures that can develop into sinkholes.

Microgravity survey to identify and delineate subsurface voids causing subsidence in a parking garage structure in Virginia.

ER, Merck Site, Bristol Myers Squibb, and Abbott Laboratories Site, Barcelonita, Puerto Rico, Sears Site, Reading, Pennsylvania, Connolly Drilling Building Site, CSR Hydro Conduit Site, MIE at Monocacy, Omega site, Becktel Site, Branch Electric, Dearbought Site, Home Depot Site, Industrial Center East, Islamic Society, NASCAR Site, Solarex Site, Tamko Site, Westview Site, and Wedgewood Site in Frederick, Maryland, Clark County Sanitary Authority, Target Site, Boyce, Virginia, Battlecreek Boulevard and Loudoun County Day School in Leesburg, Virginia, and Shepardstown, West Virginia - The purpose was to locate voids and caverns that may develop into sinkholes.

ER, Environmental Science & Engineering, Inc. Dalton, Georgia – The purpose was to locate voids that may have developed from covered soil to distinguish to warehouse fire. Voids were located to clear routes for heavy machinery such as a backhoe or geoprobe to investigate suspected impacted soil and groundwater generated by the fire.

ER and microgravity, Rockaway Township, New Jersey - The purpose to locate magnetite, copper, and gold mine shafts that may develop into sinkholes at the Green Pond Mine and White Meadow Mine, New Jersey.

ER, Herndon, Virginia, and Brookville, Maryland - The purpose to locate copper and gold mine shafts that may develop into sinkholes at the Theobold Mine, Virginia.

ER, Monroe County Parks Department, Oatka Creek Park, Scottsville, New York - The purpose to locate gypsum mine shafts that may develop into sinkholes.

ER, Stavrou Inc., Largo, Maryland - The purpose was to identify the presence of any voids beneath a roadway (Route 214) from horizontal well installation that encountered running sands.

ER and microgravity, Rockaway Township, New Jersey, Herndon, Virginia, and Brookville, Maryland - The purpose was to locate magnetite, copper, and gold mine shafts that may develop into sinkholes at the Green Pond Mine and White Meadow Mine, New Jersey and at the Theobold Mine, Virginia.

ER, Environmental Science & Engineering, Inc. Dalton, Georgia – The purpose was to locate voids that may have developed within soils used to extinguish a warehouse fire. Voids were located to clear routes for heavy machinery such as a backhoe or geoprobe to investigate suspected impacted soil and groundwater generated by the fire.