Highlights 2006: MDN/Hg in Air

Truly the last year of planned monitoring Precipitation collection (wet deposition only)

One of four CA sites (added Sequoia NP July 2003, Converse Flats Apr 2006, Yurok Tribe-Requa Aug 2006, Covelo closed 2001)

2005 cumulative wet deposition similar to previous years (2000, 2003)

Mini study by USEPA Region IX in Guadalupe Hg air concentrations @ NASA and Calero

Highlights 2006: MDN

Results: MDN

San Jose Sequoia

2nd half 2003

2040 ng/m2

.115 m precip

17.7 ng/L (3600 ng/m2 13.4 ng/L all year)

2560 ng/m2

.526 m precip

4.87 ng/L

2004 2015 ng/m2

.257 m precip

7.88 ng/L

1740 ng/m2

.412 m precip

4.22 ng/L

2005 3560 ng/m2

.431m precip

8.26 ng/L

6415 ng/m2

1.29 m precip

4.98 ng/L

Results: NASA vs Calero Concentrations

NASA not directional, Calero max from W

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Plan 2007: MDN/Hg in Air

Analyze and summarize MDN @ San Jose data MDN reporting generally ~6 months behind Draft tech report early Q2 in ’07, final Q3

Follow up Guadalupe Watershed Air Data? Dependent on Region IX mobile lab willingness/

availability