Ecology News: Quality Assurance Project Plan: Spokane River Atmospheric Deposition Study for PCBs


Quality Assurance Project Plan:  Spokane River Atmospheric Deposition Study for PCBs is now at .

There is currently a data gap for the atmospheric deposition of polychlorinated biphenyls (PCBs), and toxics in general, in eastern Washington.  The only studies that exist for the atmospheric deposition of PCBs in Washington State come from the Puget Sound region.Filling this data gap is an important first step in determining the significance of the role that PCBs in atmospheric deposition play as a source of PCBs to the Spokane River watershed and ultimately to concentrations found in the Spokane River.This study will measure seasonal PCB concentrations and flux in dry deposition and bulk (wet + dry) deposition in the Spokane River watershed.  Dry deposition will be measured by analyzing PM10 (particulate matter ≤ 10 microns) from a high volume sampler located in an urban area of Spokane.  Bulk deposition will be collected with passive samplers at two urban locations and at a regional background location.  Samples will be analyzed with high resolution method EPA 1668c for PCB congeners.  Sampling will commence in early 2016 with quarterly collection periods over the course of one year (through early 2017).

Secondary objectives to be addressed by this study include:

  • Determine if the Spokane Waste to Energy facility is a potential source of PCBs to atmospheric deposition by modeling PCB emission data using AERMOD, a plume dispersion model.
  • Provide data for estimating the contribution of PCBs in bulk atmospheric deposition to stormwater in Spokane’s Cochran stormwater basin.  The City of Spokane will be collecting PCBs in stormwater from the Cochran basin starting in spring of 2016.

If you have questions, please contact Brandee Era-Miller at 360-407-6771 or at

Quality Assurance Project Plan for “Spokane River Atmospheric Deposition Study” is available for review: Please send comments by April 13, 2016

The Department of Ecology has prepared a draft Quality Assurance Project Plan for the “Spokane River Atmospheric Deposition Study for PCBs” project.

Please provide comments to Brandee Era-Miller, Department of Ecology Environmental Assessment Program no later than April 13, 2016.

Contact information:

 Brandee Era-Miller
Washington State Department of Ecology
Environmental Assessment Program
Phone: (360) 407-6771”

June 24, 2015 Spokane River Regional Toxics Task Force Meeting

The next meeting of the Spokane River Regional Toxics Task Force is:

Date: Wednesday, June 24, 2015
Time: 9:00 a.m. to 12:30 p.m.

Liberty Lake Sewer & Water District Office
22510 E. Mission Avenue Liberty Lake, WA 99019
Click here for a map

Call In Number: 800-704-9804
Participant Code: 34863442#

Please note, the conference call in number will remain open until 15 minutes until after the meeting begins. It will continue to remain open as long as there are callers on the line. If you wish to join the meeting by phone late, please notify Adriane Borgias ( ahead of time.

Meeting Documents
SRRTTF Mtg Summary 06-24-15 DRAFT
SRRTTF June 24 2015 Agenda
–  SRRTTF 5 27 15 summary notes DRAFT
–  TTWG 6 3 15 Summary notes DRAFT
  SRRTTF-Coordinated Response-Work-Summary-FINAL SRRTTF-6-15-2015
  ECY Comparisons
–  SRRTTF_ComparabilityofReports_2015_06_24
 Combined comments on LT Phase 2 Report_Updated 6.22.15
 Technical Projects Priority Next Steps_Updated V2
–  Rationale and cost flow gages

–  SRSP comments on LimnoTech Report 6.24.15