File:November 13, 2012, Duwamish River, WA Sampling (8246528622).jpg

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Due to the river contamination, divers returning to the boat must undergo thorough rinsing with potable water. EPA divers recently demonstrated a passive sampling technique targetting 'pore water' in the Duwamish River, Washington.

Pore Water is defined as: "the water occupying the spaces between sediment particles ... Contaminants in the interstitial water and in the solid phase are expected to be at thermodynamic equilibrium. This makes interstitial waters useful for assessing contaminant levels and associated toxicity." - U.S. Environmental Protection Agency, 2001

We also know that pore water can be related to fish tissue data, so sampling in this manner can be very useful in assessing a site cleanup. EPA divers have deployed a variety of passive samplers to support Superfund work. This technique has the capability of integrating data over a longer period of time--making it more likely that a contaminated groundwater plume discharging to a river like this one will be captured, where other techniques may only produce a snapshot.

Lower Duwamish Waterway Superfund Site

www.facebook.com/EPAdivers
Date
Source November 13, 2012, Duwamish River, WA Sampling
Author USEPA Environmental-Protection-Agency

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This image (or other media) is a work of an Environmental Protection Agency employee, taken or made as part of that person's official duties. As works of the U.S. federal government, all EPA images are in the public domain.

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This image was originally posted to Flickr by usepagov at https://flickr.com/photos/24400159@N05/8246528622. It was reviewed on 1 October 2016 by FlickreviewR and was confirmed to be licensed under the terms of the United States Government Work.

1 October 2016

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current05:54, 1 October 2016Thumbnail for version as of 05:54, 1 October 2016960 × 720 (77 KB)Vanished Account Byeznhpyxeuztibuo (talk | contribs)Transferred from Flickr via Flickr2Commons

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