| Report Year: 2009 |
| Hannen Lake, Benton County |
| Carbon Balance Table |
| Parameter | 6/22/2009 | 7/27/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 173 | 164 | 168.5 | - | 116.3 | 130.0 | 124.7 | 143.7 | 113.7 | 138.0 | 148.0 | 164.0 |
| Dissolved Organic Carbon (mM) | 0.50 | 0.46 | 0.48 | - | 0.62 | 0.79 | 0.60 | 0.56 | 0.85 | 0.85 | - | - |
| Temperature (oC) | 26.8 | 24.4 | 25.6 | - | 26.3 | 24.2 | 26.5 | 24.7 | 24.5 | 25.7 | 24.1 | 25.3 |
| Specific Conductivity (μS/cm) | 360.0 | 350.0 | 355.00 | - | 259.50 | 306.39 | 289.37 | 405.85 | 360.86 | 334.40 | 275.55 | 375.99 |
| pH | 8.1 | 8.0 | 8.1 | - | 8.9 | 9.1 | 9.3 | 8.7 | 8.4 | 8.4 | 8.8 | 8.3 |
| I (Ionic Strength ?) | 0.0630 | 0.0613 | 0.0621 | - | 0.0454 | 0.0536 | 0.0506 | 0.0710 | 0.0631 | 0.0585 | 0.0482 | 0.0658 |
| Dissolved Inorganic Carbon (mM) | 3.44 | 3.29 | 3.37 | - | 2.18 | 2.32 | 2.09 | 2.70 | 2.21 | 2.68 | 2.80 | 3.23 |
| pCO2 (μatm) | 1141 | 1434 | 1287.6 | - | 150.6 | 96.4 | 60.1 | 308.5 | 452.1 | 591.0 | 231.4 | 794.4 |
| Equilibrium CO2 | 12.01 | 12.86 | 12.43 | - | 12.19 | 12.98 | 12.15 | 12.76 | 12.89 | 12.43 | 13.21 | 12.55 |
| CO2 (μM) | 37.03 | 49.82 | 43.43 | - | 5.03 | 3.27 | 2.08 | 10.68 | 16.45 | 20.50 | 8.85 | 27.00 |
| Δ CO2 from Equilibrium | 25.027 | 36.966 | 31.00 | - | -7.16 | -9.71 | -10.07 | -2.08 | 3.55 | 8.07 | -4.35 | 14.45 |