Need to Test
Benzo[a]Pyrene in Soil?
A contractor performing work at a former military shooting range, sent samples to Sitelab to perform PAH
analysis. The soils were contaminated with lead shot and clay
pigeons. Clay pigeon targets are made with limestone mixed
with petroleum asphalt pitch (often coal tar based), which contain high levels of Benzo[a]Pyrene
and other PAH compounds as a result of the combustion process.
Sitelab's UVF instruments cannot separately detect PAH compounds directly,
response factors can be used to estimate and report Benzo[a]Pyrene
or other problematic compounds accurately. The samples tested during this pilot study were blind,
well homogenized split samples previously tested by a certified lab
using EPA Method 8270 by GC/MS.
Since the Sitelab Target PAH
concentrations were close to the laboratory's total PAH
concentrations, and the proportion of Benzo[a]Pyrene to the other
PAHs was consistent, as reported by the lab, using a response factor
to adjust the Sitelab results in order to estimate Benzo[a]Pyrene
generated accurate and reliable data.
Sitelab's results can
then be used on-site to help with soil removal, remediation
and investigation efforts.