Case study - UVF and LIF used together at oil refinery site

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Courtesy of Sitelab Corporation

A former oil refinery in Kansas has a 100-acre size plume of oil. The NAPL is commingled with gasoline, diesel, crude oil and other petroleum products. An environmental consultant used Sitelab’s UVF to field screen hundreds of soil samples for EPH C11-C22 aromatic hydrocarbons. Split samples sent to a confirmatory lab directly correlated (see graph).

Laser Induced Fluorescence (LIF) had also been used on this site. LIF is sensitive to aromatic hydrocarbons, but results are qualitative (as % response). The consultant used the UVF results to convert the LIF data to TPH concentration, and by doing so, was able to better calculate how much oil exists below the ground.

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