The dataset contains the results of the gas sampling performed following two injections of a mixture of the tracer gases (SF6 and Xe). Two tracer gas injections were conducted in 2018 in Carroll, New Hampshire. Tracer gas injections were performed beneath the water table in two chemical-explosion generated cavities to compare the migration of sulfur hexafluoride (SF6) and xenon (Xe) through an explosion-generated fracture network and to study the influence of ground water on gas transport. A mixture of tracer gases (50% of SF6 and 50% of Xe) was injected into each cavity. The first gas injection took place on September 8, 2018 and gas sampling continued until September 20, 2018. The second injection was performed on October 31, 2018 and gas sampling continued until November 8, 2018. The data were collected using an automatic sampling system. The data analysis was performed by using a gas chromatograph (Shimadzu GC-8A) with a Thermal Conductivity Detector (TCD). The gas concentrations measured at the surface from 4 sampling locations are provided. In addition, we provide measurements of the barometric pressure and temperature recorded using an Onset HOBO pressure transducer placed in the vicinity of the injection site approximately 1 m above ground and collecting pressure and temperature samples every 15 minutes for the duration of the experiment. The pressure and temperature data is provided in Tables S2 and S4.

{"references": ["Avendano, S., A. Stroujkova, D. R. Harp, M. Horne, M. A. Person, J. D. Gomez-Velez, E. Gorman, and C. R Carrigan (2018), Gas Migration Experiments and Hydrologic Effects of Explosions in Fractured Granite, American Geophysical Meeting, 10 \u2013 14 December, 2018, Washington, DC, H53A-08."]}

The experiment was supported by the Defense Threat Reduction Agency Grant No. HDTRA1-17-1-0040. The content of the information does not necessarily reflect the position of the Federal Government and no official endorsement should be inferred.