When collecting surface soil samples for lead analysis, why am I being required to sieve the samples to 250 microns (No. 60 sieve) and analyze the finer fraction?
Previous site investigations across the country have demonstrated a tendency for lead contamination to be concentrated in the finer (dust sized) fraction of soil. It is also from this size fraction that most exposure to humans occurs. Therefore, at facilities where lead is likely to be a contaminant of concern, DEQ requires analysis of the finer fraction.
Related Questions
- When collecting surface soil samples for lead analysis, why am I being required to sieve the samples to 250 microns (No. 60 sieve) and analyze the finer fraction?
- For screening purposes, can an XRF be used instead of laboratory analysis for metals soil samples and how should the data be evaluated?
- How should soil samples be prepared for analysis?
