Jeff Roberts will deliver a presentation entitled “Passive Sampling Approaches and Tools for Sediment Pore Water and Soil Gas Surveys” at the 2018 SMART Remediation conference at the Ottawa Conference and Event Centre in Ottawa, Ontario from 8:45 to 9:10 a.m. on February 15, 2018.
Jeff is a Senior Manager at SiREM with extensive technical experience in the laboratory assessment and field implementation of soil, sediment and groundwater remediation technologies at sites containing contaminants including chlorinated solvents, petroleum hydrocarbons and other recalcitrant compounds. Over the past fifteen years he has conducted and managed hundreds of bench-scale batch and column treatability studies and also has technical experience in the growth, scale up and field implementation of several anaerobic microbial cultures (KB-1®/KB-1® Plus) for bioremediation remedies. Jeff has several years of passive sampling experience and was a lead member in the development and commercialization of the SP3TM sampler.
Smart Methods in Advanced Remediation Technologies (SMART) is a series of technical learning seminars for environmental professionals and designed with the following in mind: to provide information and an opportunity to learn about advanced technologies and approaches for effective delineation and remediation of contaminated soil and groundwater, to facilitate discussion between professionals regarding these technologies and approaches, and to network with other professionals in the industry.
Their goal is to bring the North American environmental community together to enhance their collective understanding of cutting edge characterization and remediation technologies. With ongoing changes in regulations and requirements, all environmental professionals need to be up-to-date on the latest strides in SMART Remediation.
Passive sampling technologies are increasingly being used for environmental monitoring. Passive sampling provides several advantages over traditional active or grab sampling techniques including: providing results as a time weighted average, discrete location sampling, ease of use and lower cost. This presentation will discuss passive sampling approaches and tools for both sediment pore water and vapour (soil gas and indoor air).
In sediment pore water, passive sampling devices (PSDs) such as the SP3™ provide data to estimate contaminant bioavailability and toxicity to environmental receptors that is more accurate than conventional grab or mechanically-extracted samples. The reason for this is that PSDs quantify only freely-dissolved contaminants, not sorbed mass. PSDs have been used in the laboratory and in the field to focus site investigation and make remediation decisions. In terms of site investigation, a rapid (2-week) passive sampling deployment was used to evaluate PCB and PAH availability, and exposure risk, in sediments at an active shipyard. A PCB treatability case study will highlight the use of PSDs to evaluate the effectiveness of sediment caps. The study examined using varying levels of activated carbon to optimize the remedy and reduce costs. Additionally, the presentation will review recent advances in deploying samplers without scuba divers, optimizing ex situ passive sampling in small sediment and soil samples, and the evaluation of new analytes.
In soil gas surveys passive sampling of volatile organic compounds (VOCs) with the Waterloo Membrane Sampler™ (WMS) has been demonstrated to provide concentration data of similar accuracy and precision compared to conventional active methods. In indoor air, passive sampling can provide accurate concentrations over a longer time period (up to several months) compared to traditional sampling methods with Summa canisters; providing data that is more applicable to long-term human health exposure assessments. Furthermore, passive sampling protocols are faster and simpler, and cheaper, than traditional methods, particularly for soil vapor and sub-slab vapor sampling where the complex procedures for leak prevention and tracer testing are not necessary with passive sampling. Overall, the ease, cost and unobtrusiveness of passive samplers make them a valuable tool when evaluating soil gas and indoor air.
Read the agenda: SMART Remediation 2018 Agenda.
Learn more about the event: 2018 SMART Remediation Ottawa.
For consultation regarding sediment pore water and soil gas, contact Jeff Roberts at JRoberts@Siremlab.com.
Learn more about Jeff at: https://www.linkedin.com/in/jeff-roberts-209a048/
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