  |
|
|
|
|
| Title | Pesticides in Salmonid-Bearing Streams: Intensive Sampling in an Agricultural Drain - A Cooperative Study by the Washington State Department of Ecology and the Washington State Department of Agriculture | |||
| Month-Year Published | July 2008 | |||
| Online Availability |
874 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
| |||
| Short Description |
The Departments of Ecology and Agriculture have conducted surface water pesticide monitoring in salmon-bearing streams since 2003. The 2007 project evaluated the adequacy of the current weekly sample regime. Pesticide detections from weekly surface water grab samples were compared to daily grab samples over 22 days. Detections from two Passive Samplers were also compared to the daily grab sample results. The study site was Marion Drain, a 19-mile agricultural drain that discharges into the Yakima River. Marion Drain is used by salmonids including: Chinook, Coho, and endangered Steelhead. (Also see abstract below) | |||
| Publication Number | 08-03-020 | |||
| Author(s) | Dugger, D., C. Burke, J. Jorden, P. Anderson, D. Norton, and J. Cowles (WSDA) | |||
| Print Availability | ||||
| Number of pages | 39 + app (55 total) | |||
| Keywords | agriculture, chemical, pesticide, river, salmon, stream, water | |||
| Subject Waterbodies |
| |||
| Related Web Content | Poster from conference | |||
| Related Publications | Title | Relationship | ||
| Quality Assurance Project Plan: Marion Drain Intensive Surface Water Sampling for Pesticides In Salmonid-Bearing Streams | similar topic | |||
| Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams, 2007 Data Summary | similar topic | |||
| Quality Assurance Project Plan: Skagit-Samish Watershed Intensive Surface Water Sampling for Pesticides in Salmonid-Bearing Streams | similar topic | |||
| Abstract | Long Description |
The Washington State Department of Ecology and the Washington State Department of Agriculture have monitored pesticides in salmonid-bearing streams during the application season since 2003. This 2007 project compared pesticide concentrations measured in daily and weekly samples with pesticide residues accumulated by two types of passive samplers, Semi-Permeable Membrane Devices (SPMDs) and Polar Organic Chemical Integrative Samplers (POCISs). The objective was to evaluate short-term variation in pesticide occurrence and concentration, and assess the adequacy of the current weekly sampling regime. The study site was Marion Drain, a heavily cropped, 19-mile drainage ditch that discharges into the Yakima River. Marion Drain is used by salmonids including chinook, coho, and endangered steelhead. The study was carried out over 22 days in the spring of 2007. A total of 21 pesticide compounds were detected during the study. Daily grab sampling detected only one more pesticide than the number observed during four pre-scheduled weekly sampling events. Detection frequency and median values were similar between daily and weekly sets. Weekly sampling failed to detect some isolated peaks in concentration and some rarely detected compounds found in the daily samples. SPMDs detected more hydrophobic and legacy pesticides than grab samples. The additional detections reflect the lower reporting limits in the SPMDs. Results from the POCISs were compromised by pesticide detections in the field blank and by inconsistent detections between sample replicates. The authors of this study recommend that the monitoring program: ----- For EIM numbers below: CBUR0004 (field measurements and surface water grab sampling data) CBUR0005 (passive sampler data) |
||
This page last updated August 14, 2009
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.
