1. Small Tributary Loads The “Guadalupe River Study” Lester McKee, John Oram, Jon Leatherbarrow SFEI Autumn Bonnoma, Mark Stephenson, Wes Heim MLML Item #8

2. Sampling Location Item #8

3. Sampling Item #8

4. Suspended Sediment Loads Item #8

5. HgT v SSC (all data) Item #8

6. Sources of Mercury Item #8 HgT mg/kg (ppm)

7. Total Mercury Loads 111% MAQ96% MAQ 133% MAQ Item #8

8. Methylmercury Concentrations Item #8

9. Methyl Mercury Loads  40 g or 0.5% of total Hg load Item #8

10. Bedload Mercury Concentrations Item #8

11. Bedload Mercury Loads  1% of total Hg load Grainsize (mm) <0.5<1<2<4<8<16<32<64Total Percent Finer Than (%)161531517598100 Bed Load Sediment Transport (t)1783150258333399391331,663 Mercury (mg/kg)0.420.240.0940.0580.029 Bed Load Mercury Transport (g)7201415911 188 Item #8

12. WY05 Organic Contaminants Concentrations RangeFWMC WY 20033.4 – 90 ng/l55 ng/l WY 20040.7 – 66 ng/l26 ng/l tPBDEs = 2 to 3 x tPCBs Item #8

13. Organic Contaminants Loads Item #8

14. WY 2003 WY 2004 WY 2005 DischargeSSC 53.1 Mm 3 45.3 Mm 3 58.0 Mm 3 10,805 tons 8,578 tons 4,575 tons Item #8

15. tPCBs vs. SSC WY 2005 samples showed increased separation between rising and falling stages Item #8

16. Rising and Falling Stages tPCBstPBDEs Item #8

17. Project Schedule  WY 2005  Report completed read for review  WY 2006 funded by USACE/SCVWD / RMP  Complete QAQC for all WYs and get the data on the WWW  Write papers for Journal  WY 2007 funded?  Only WY 2006 currently guaranteed but everything in place for continuation  RMP funding not yet discussed  Future Modeling (if funding is found)?  Explore transport processes in more detail  Explore and predict the effects of management on Hg loads Item #8