Groundwater seems not to influence BTEX surface geochemistry

A study of the effects of water saturation thickness changes on hydrocarbon concentra- tion at the surface requires an appropriate measuring technique. In the present analysis, near-surface measurement of benzene, toluene, ethylbenzene, and xylene (BTEX) gases were used to detect the presence of oil at depth. Since such gases are components of the trapped oil, they offer a direct indication of oil in place rather than an indirect chemical or physical change caused by vertical oil migration. MSI-301 can measure benzene, toluene, ethylbenzene, and xylene gases (Fig. 1).Click here to enlarge imageThe instrument used, the MSI-301 (Fig. 1), is field portable and can measure BTEX gases to part...

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