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PASSIVE PE SAMPLING IN SUPPORT OF IN SITU REMEDIATION OF CONTAMINATED SEDIMENTS: FINAL REPORT
Gschwend, P. and K. Palaia.
ESTCP Project ER-200915, 87 pp, 2015

This project sought to demonstrate (a) polyethylene (PE) passive sampling effectively evaluates porewater concentrations of contaminants; (b) PE can delineate the horizontal and vertical extent of contamination; (c) PE is suited for long-term monitoring; and (d) the PE passive sampling approach is commercially viable. Lab tests showed the PE samplers measured pore waters more accurately than the common commercial practice of using sediment concentrations. PE sampling readily revealed the distribution of sediment contamination by PCBs at the demonstration site. PE samplers showed the site had pg/L levels of individual PCBs in pore waters and bottom waters. Sand-cap data indicated no upward PCB fluxes through the caps. Finally, QA/QC, sensitivity, ease of use, and cost metrics all supported the conclusion that PE passive sampling is commercially viable. https://www.serdp-estcp.org/content/download/37112/354243/file/ER-200915-FR.pdf



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