| Report Year: 2009 |
| Browns Lake, Woodbury County |
| Carbon Balance Table |
| Parameter | 6/1/2009 | 7/6/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 195 | 175 | 185.0 | - | - | 163.0 | 180.3 | 153.0 | 136.3 | 162.8 | 137.3 | 179.7 |
| Dissolved Organic Carbon (mM) | 0.74 | 0.57 | 0.65 | - | - | 0.49 | 0.70 | 0.58 | 0.84 | 0.84 | - | - |
| Temperature (oC) | 22.6 | 26.4 | 24.5 | - | - | 20.7 | 25.3 | 24.9 | 24.6 | 24.2 | 25.7 | 27.1 |
| Specific Conductivity (μS/cm) | 690.0 | 640.0 | 665.00 | - | - | 633.14 | 733.61 | 666.89 | 738.76 | 745.92 | 689.37 | 969.70 |
| pH | 8.5 | 8.5 | 8.5 | - | - | 8.6 | 8.5 | 8.6 | 8.6 | 8.4 | 8.5 | 8.4 |
| I (Ionic Strength ?) | 0.1208 | 0.1120 | 0.1164 | - | - | 0.1108 | 0.1284 | 0.1167 | 0.1293 | 0.1305 | 0.1206 | 0.1697 |
| Dissolved Inorganic Carbon (mM) | 3.76 | 3.38 | 3.57 | - | - | 3.13 | 3.46 | 2.93 | 2.60 | 3.15 | 2.61 | 3.48 |
| pCO2 (μatm) | 477 | 479 | 478.1 | - | - | 333.6 | 497.0 | 419.0 | 275.0 | 530.5 | 358.2 | 595.7 |
| Equilibrium CO2 | 13.57 | 12.15 | 12.86 | - | - | 14.35 | 12.55 | 12.97 | 12.90 | 13.10 | 12.47 | 11.91 |
| CO2 (μM) | 17.50 | 15.72 | 16.61 | - | - | 12.94 | 16.99 | 13.46 | 9.64 | 17.99 | 12.34 | 18.96 |
| Δ CO2 from Equilibrium | 3.934 | 3.573 | 3.75 | - | - | -1.41 | 4.45 | 0.49 | -3.26 | 4.90 | -0.13 | 7.05 |