Is Age-Dating a Petroleum Middle Distillate Junk Science?
At the American Academy of Forensic Sciences meeting in San Francisco in February, 1998, a case study was presented regarding the age-dating of a release of #2 fuel oil. As a Halloween prank on October 31, 1993, a valve inside a fenced heating oil storage facility in southeastern Pennsylvania was partially opened allowing approximately 800 gallons of home heating oil to be released. In August, 1996, a petroleum expert studied the analytical data from more than 20 contaminated soil samples collected from the site. The expert=s opinion was that the home heating oil was greater than 15 years old and most likely greater than 20 years old. Was the 1993 release superseded by another much older release? Monitoring well MW-2 was in place prior to the 1993 release. Quarterly monitoring of the groundwater from this well prior to the heating oil release did not show any petroleum product. In the sampling which occurred in November, 1993, immediately after the release, there were 18 inches of free
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