1. NAPA PLANT SITE RESTORATION PROJECT SOUTH UNIT BREACH 2010 Water Quality Monitoring

2. Three Breach Locations 1 st Breach CB8 1 st Breach CB8 –(Aug. 25, 2010) –(Sep. 7, 2010) 2 ND Breach “Y” 2 ND Breach “Y” –(Sep. 22, 2010) 3 rd Breach “Barge” 3 rd Breach “Barge” –(Oct. 5, 2010)

3. Water Quality Monitoring South Unit Breach 2010 Photo Before Photo After

4. Water Quality Collection Water Quality Collection Out going tide, based on adjusted tide schedule of Brazos Bridge Out going tide, based on adjusted tide schedule of Brazos Bridge 2 Hach Sondes- one was deployed to collect hourly readings of salinity. 2 Hach Sondes- one was deployed to collect hourly readings of salinity.

5. Water Quality Parameters Salinity Salinity Turbidity Turbidity pH pH Dissolved Oxygen Dissolved Oxygen Specific Conductivity Specific Conductivity Temperature Temperature

6. Water Quality Monitoring Plan Locations

7. Salinity Reduction Breach CB8

8. Salinity Reduction Breach at CB8 August 24, 2010- 1 day prior to breach August 25, 2010- day of breach

11. Continuous Sonde at CB8 220-Ft 70-Ft

13. Water Quality Monitoring Internal Units

15. “Y” Breach SU-B3

19. “Barge” Breach SU-CB2

22. Overall the decrease in salinity followed the projected models, allowing the Napa Plant Site to gradually transition to ambient conditions (Napa River). This gradual process made the salinity reduction phase a success. Overall the decrease in salinity followed the projected models, allowing the Napa Plant Site to gradually transition to ambient conditions (Napa River). This gradual process made the salinity reduction phase a success.

23. There is still an existing salt crust inside the unit that appears to be slowly dissolving as expected. There is still an existing salt crust inside the unit that appears to be slowly dissolving as expected.

24. Turbidity

25. Challenges Complex monitoring schedule in conjunction with permit regulations and multiple breaches Complex monitoring schedule in conjunction with permit regulations and multiple breaches Tide depth and time of sampling versus mudflats and boat access. Tide depth and time of sampling versus mudflats and boat access. Continuous Sonde deployment issues Continuous Sonde deployment issues

26. Wildlife Response Shorebirds Shorebirds Salmonids and other fish species Salmonids and other fish species Harbor seals Harbor seals Waterfowl Waterfowl

27. Thank you to GAIA, DFG, Cargill and DU for this great opportunity. Questions?