1 / 16

Coeur d

liam
Download Presentation

Coeur d

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Coeur d’Alene Basin Environmental Monitoring Plan Sediment Monitoring Anne Dailey, EPA TLG Meeting May 1, 2007

    3. Overview of Sediment Monitoring Key indicator of change - metals in soil and sediment Analyze for contaminants of environmental concern: arsenic, cadmium, copper, lead, mercury, silver and zinc Interpretation focuses on Cd, Zn and Pb Sieved sediment samples: Silt (4 – 63 µm) Fine sand (63 -250 µm)

    5. Sampling Requirements Annual sampling at key Basin locations Composite surface samples collected within high-flow channel at low water conditions Analysis of metals using ICP-AES and Hg analyzed using cold vapor atomic adsorption Filter residue from filtration of surface water collected during high water events

    6. Sampling Requirements (cont.) Decadal ‘snapshots’ of Basin soil/sediment to evaluate aggregated, area-wide temporal average Upper Basin – Ninemile Creek, SFCDR, Pine Creek Lower Basin – Floodplain and Harrison delta Spokane River – mid- and lower Long Lake First event in 2009

    7. Alterations to Sampling Plan Due to lack of depositional areas of sand and fine sediment, eliminated Spokane River station at Eastern boundary of Spokane Reservation (per USGS) Slight shift of 2 station locations in 2005 – new locations expected to be permanent Eliminated 2 µm sample collection/analysis and focusing on more biologically relevant <63 µm and 63 – 250 µm samples

    16. Next Steps Continue annual sediment sampling First decadal “snapshot” sampling in 2009 Integrate with RA effectiveness monitoring data and OU2 monitoring Full analysis of sediment and other BEMP data in next Five Year Review Report

More Related