| Report Year: 2009 |
| Clear Lake, Cerro Gordo County |
| Carbon Balance Table |
| Parameter | 6/25/2009 | 7/30/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 163 | 144 | 153.5 | - | 170.1 | 152.2 | 148.7 | 125.1 | 110.3 | 157.2 | 129.0 | 149.3 |
| Dissolved Organic Carbon (mM) | 0.71 | 0.72 | 0.71 | - | 0.65 | 0.76 | 0.81 | 0.78 | 1.06 | 1.04 | - | - |
| Temperature (oC) | 24.2 | 23.3 | 23.7 | - | 23.8 | 23.5 | 25.1 | 23.3 | 22.8 | 24.2 | 23.3 | 23.9 |
| Specific Conductivity (μS/cm) | 370.0 | 410.0 | 390.00 | - | 364.96 | 346.35 | 343.34 | 385.25 | 343.40 | 406.29 | 259.59 | 293.86 |
| pH | 8.3 | 8.4 | 8.3 | - | 7.6 | 8.6 | 8.7 | 8.8 | 8.7 | 8.5 | 8.9 | 8.5 |
| I (Ionic Strength ?) | 0.0648 | 0.0718 | 0.0683 | - | 0.0639 | 0.0606 | 0.0601 | 0.0674 | 0.0601 | 0.0711 | 0.0454 | 0.0514 |
| Dissolved Inorganic Carbon (mM) | 3.21 | 2.82 | 3.02 | - | 3.90 | 2.91 | 2.80 | 2.35 | 2.10 | 3.06 | 2.38 | 2.74 |
| pCO2 (μatm) | 712 | 513 | 612.6 | - | 13923.0 | 488.2 | 232.2 | 247.1 | 171.8 | 482.2 | 142.6 | 305.7 |
| Equilibrium CO2 | 12.95 | 13.31 | 13.13 | - | 13.13 | 13.24 | 12.63 | 13.30 | 13.56 | 12.99 | 13.51 | 13.47 |
| CO2 (μM) | 24.92 | 18.45 | 21.69 | - | 532.89 | 16.54 | 8.06 | 8.89 | 6.34 | 16.89 | 5.09 | 10.97 |
| Δ CO2 from Equilibrium | 11.976 | 5.140 | 8.56 | - | 519.76 | 3.30 | -4.58 | -4.41 | -7.22 | 3.90 | -8.43 | -2.50 |