First, gas chromatography was used to compare motor oil samples with oil isolated from the ponding basin to look for similarities of oil type. The results suggest that motor oil is a probable source od ponding basin contamination.
Second, predetermined concentrations of nitrogen and phosphorous were added to laboratory microcosms of ponding basin soil and water. Gas chromatography was used to demonstrate the enhancement of oil biodegradation for the enriched as compared to a control microcosm. Dissolved oxygen measured in each microcosm also indicated that more aerobic microbial activity occurred in the nutrient-enriched microcosm.
The results may be useful in developing a plan to prevent further ground water contamination through enhancement of oil biodegradation by naturally occurring microorganisms.
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