1 / 18

Carbaryl Monitoring in Glassy-Winged Sharpshooter Treatment Areas, Chico

Carbaryl Monitoring in Glassy-Winged Sharpshooter Treatment Areas, Chico. Johanna Walters and Kean S. Goh Department of Pesticide Regulation GWSS Public Information Meeting February 15, 2001 Chico. Outline . Introduction Monitoring Objectives Sampling Sites Sampling Methods

argyle
Download Presentation

Carbaryl Monitoring in Glassy-Winged Sharpshooter Treatment Areas, Chico

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Carbaryl Monitoring in Glassy-Winged Sharpshooter Treatment Areas, Chico Johanna Walters and Kean S. Goh Department of Pesticide Regulation GWSS Public Information Meeting February 15, 2001 Chico

  2. Outline • Introduction • Monitoring Objectives • Sampling Sites • Sampling Methods • Results and Conclusions

  3. Introduction • Department of Pesticide Regulation • Independent monitoring • Consultation • Environmental data • Urban environment

  4. Monitoring Objectives Obtain data on environmental concentration of Carbaryl to ensure • human safety • ecological safety • proper application

  5. Sampling Sites Selection Criteria • Sensitive areas • human & ecological • Worst-case monitoring • proximity to application • highest amount used • Highest frequency

  6. Sampling Sites

  7. Environmental Media • Tank Mixture • Air • Surface Water • Ground Water • Foliage • Fruits and Vegetables • Fish

  8. Carbaryl Application

  9. Tank Mixture

  10. Air Monitoring

  11. Water Sampling

  12. Results: Tank Mixture Location Date Sampled Concentration % _________________________________________ Whitman Ave11/5/00 0.142 Chico Mall “ 0.151 __________________________________________________________________________________________________ Label rate ranged 0.05 to 0.20%

  13. Results: Air • Whitman Ave • Four Intervals • 1 hour before • Duration of application plus 1 hour • 24 hours after • Another 24 hours • No residue detected • Health level 3,057 ppt

  14. Results: Foliar Safe levels: 5.6 ug/cm2

  15. Results: Surface Water • Sites • Little Chico Creek • Comanche Creek • Sampling dates • Prespray November 4, • Postspray November 5, • First Rain Event November 13 • No Carbaryl detected Minimum Detection Level 0.05 ppb

  16. Acknowledgments Consultants CDFG, NMFS, RWQCB, Co.Dept. of Ag. CDFA Collaborators Property Owners, Applicators Center for Analytical Chemistry C Cooper, J Hsu, J White, J Hernandez, H Feng, P Lee, D Tran DPR Field Staff Dave Kim, Dee Jones, Nina Bacey

More Related