Technical Report No. 16

SURVEY FOR PESTICIDES ON THE PADILLA BAY NATIONAL ESTUARINE RESEARCH RESERVE DEMONSTRATION FARM, 1993

Douglas A. Bulthuis and Wilbur C. Anderson

August 1996

Bibliographic Citation
Bulthuis, Douglas A. and Wilbur C. Anderson. 1996. Survey for pesticides on the Padilla Bay National Estuarine Research Reserve Demonstration Farm. 1993. Washington State Department of Ecology (Publication No. 96-121), Padilla Bay National Estuarine Research Reserve Technical Report No. 16, Mount Vernon, Washington. 15 pp.

Abstract
Sediment samples were collected from fields on the Padilla Bay National Estuarine Research Reserve Demonstration Farm, from surface ditches that drained the farm, and from No Name Slough that flows through the farm. The concentration of chlorinated pesticides was determined in all samples, and the concentration of metals, total organic carbon, and grain size analysis determined in ditch and slough samples. Only two chlorinated pesticides (beta-BHC and 4, 4'-DDE) were detected. They were just above the detection limit in one ditch sample. The concentration of metals in sediments from the ditches and slough reflected the influence of seawater and the silt and clay composition of the sediments. There was no indication of high concentrations of chlorinated pesticides or heavy metals in the fields or ditches of the Padilla Bay National Estuarine Research Reserve Demonstration Farm.