Ambient Monitoring for Pesticides in Washington State Surface Water May 2020 2017 Technical Report Washington State Department of Agriculture Natural Resources Assessment Section Derek I. Sandison, Director Visit the Department of Agriculture’s Natural Resources Assessment Section website at agr.wa.gov/AgScience to view or download this report. Contact Information Program Manager Gary Bahr 360-902-1936 Natural Resources Assessment Section Washington State Department of Agriculture Olympia, Wash. [email protected] Communications Director Hector Castro 360-902-1815 Washington State Department of Agriculture Olympia, Wash. [email protected] Any use of product or firm names in this publication is for descriptive purposes only and does not imply endorsement by the author or the Department of Agriculture. Publication No. 102-629 (R/5/20) Do you need this publication in an alternate format? Please call the WSDA Receptionist at 360-902-1976 or TTY 800-833-6388. Ambient Monitoring for Pesticides in Washington State Surface Water May 2020 2017 Technical Report Washington State Department of Agriculture Natural Resources Assessment Section Lead author: Katie Noland Matthew Bischof, Margaret Drennan, Abbey Nickelson, Jadey Ryan Ambient Monitoring for Pesticides in Washington State Surface Water: 2016 Technical Report | i Acknowledgments The authors of this report would like to thank the following people and organizations for their important contributions to this study: • The Washington State Department of Ecology Manchester Environmental Laboratory staff for their care and attention to detail in every step of the process: method development, sample transport, logging, extraction, analysis, quality assurance and quality control, and data reporting. Without their work, this project would not be possible. • WSDA Natural Resources Assessment Section staff for their sampling assistance. • Yakama Nation: Elizabeth Sanchey, Environmental Management Program Manager • WSDA Pesticide Compliance: Gail Amos, Chris Sutherland, and David Bryson • Roza-Sunnyside Board of Joint Control: Elaine Brouillard • Chelan County Natural Resource Department: Mike Kaputa and Pete Cruickshank • The many private landowners who allow us to access our monitoring sites through their property. Ambient Monitoring for Pesticides in Washington State Surface Water: 2017 Technical Report | ii Table of Contents Acknowledgments ............................................................................................................... ii Table of Contents ............................................................................................................... iii List of Figures .......................................................................................................................v List of Tables ....................................................................................................................... vii Executive Summary ........................................................................................................... 1 Introduction .......................................................................................................................... 4 Study Area ............................................................................................................................ 6 Study Methodology ............................................................................................................ 7 Study Design .................................................................................................................... 7 Field Procedures ............................................................................................................. 7 Laboratory Analyses ....................................................................................................... 8 Data Quality, Quality Assurance, and Quality Control Measures ........................ 8 Field Replicates ........................................................................................................... 9 Blanks ........................................................................................................................... 9 Surrogates, Matrix Spikes, and Laboratory Control Samples ................................. 9 Assessment Criteria ..................................................................................................... 10 Pesticide Registration Toxicity Data .........................................................................11 National Recommended Water Quality Criteria ......................................................11 Washington State Water Quality Standards for Pesticides ....................................12 Relationship between WSDA Assessment Criteria and Sources ..........................12 Numeric Water Quality Standards for Temperature, pH, and Dissolved Oxygen ........................................................................................................................................... 13 Monitoring Site Results ...................................................................................................15 Bertrand Creek .............................................................................................................. 16 Lower Big Ditch ............................................................................................................. 23 Upper Big Ditch ............................................................................................................. 27 Burnt Bridge Creek ....................................................................................................... 32 Indian Slough ................................................................................................................. 36 Woodland Creek ............................................................................................................ 40 Brender Creek ................................................................................................................ 43 Lower Crab Creek ......................................................................................................... 50 Marion Drain ................................................................................................................... 54 Mission Creek ................................................................................................................ 58 Naneum Creek ............................................................................................................... 61 Ambient Monitoring for Pesticides in Washington State Surface Water: 2017 Technical Report | iii Snipes Creek .................................................................................................................. 64 Stemilt Creek .................................................................................................................. 68 Sulphur Creek Wasteway ......................................................................................................... 71 Statewide Results ..............................................................................................................75 Pesticide Detection Summary .................................................................................... 76 Herbicide Detections ..................................................................................................76 Fungicide Detections ..................................................................................................78 Insecticide Detections ................................................................................................79 Degradate and Other Pesticide Detections .............................................................80 Legacy Insecticide DDT and Degradate Detections ...............................................82 Conclusions ........................................................................................................................83 Program Changes ..............................................................................................................86 References ...........................................................................................................................87 Appendix A: Assessment Criteria for Pesticides ...................................................90 Assessment Criteria References ............................................................................... 96 Appendix B: 2017 Quality Assurance Summary ...................................................109 Data Qualification ........................................................................................................ 109 Analytical Quality Assurance and Quality Control Sample Summaries ......... 116 Field Replicate Results ............................................................................................ 116 Field Blank Results ...................................................................................................120 Laboratory Duplicates ..............................................................................................120 Matrix Spike/Matrix Spike Duplicate Results .........................................................121 Laboratory Blanks.....................................................................................................127 Surrogates .................................................................................................................128 Laboratory Control Samples ....................................................................................129