Ebbert, James C.Embrey, Sandra S.2019-09-032019-09-032002Ebbert, J. C., & Embrey, S. S. (2002). Pesticides in surface water of the yakima river basin, washington, 1999–2000—their occurrence and an assessment of factors affecting concentrations and loads (Water-Resources Investigations Report No. 2001–4211) (p. 49). U.S. Geological Survey.http://hdl.handle.net/20.500.11867/17856Report, 49 pages, 3.2 Mb.The occurrence, distribution, and transport of pesticides in surface water of the Yakima River Basin were assessed using data collected during 1999–2000 as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program. Samples were collected at 34 sites located throughout the basin in August 1999 using a Lagrangian sampling design. Samples also were collected weekly and monthly from May 1999 through January 2000 at three of the sites. This report includes data for 47 pesticide compounds from the analysis of filtered water using ocadecyl (C-18) solid-phase extraction and gas chromatography/ mass spectrometry.en-USNO KNOWN COPYRIGHT The organization that has made the Item available reasonably believes that the Item is not restricted by copyright or related rights, but a conclusive determination could not be made. Please refer to the organization that has made the Item available for more information. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use.Resource managementWater qualityPesticidesEnvironmental monitoringTechnical Report