| Report Year: 2009 |
| Center Lake, Dickinson County |
| Carbon Balance Table |
| Parameter | 6/2/2009 | 7/7/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 188 | 176 | 182.0 | - | 163.0 | 168.7 | 184.0 | 179.7 | 132.7 | 166.0 | 126.7 | 204.0 |
| Dissolved Organic Carbon (mM) | 0.99 | 0.89 | 0.94 | - | 2.10 | 1.04 | 1.23 | 1.16 | 1.36 | 1.47 | - | - |
| Temperature (oC) | 19.8 | 23.9 | 21.8 | - | 23.0 | 23.9 | 22.5 | 21.6 | 21.6 | 23.0 | 22.4 | 24.3 |
| Specific Conductivity (μS/cm) | 630.0 | 660.0 | 645.00 | - | 598.12 | 585.45 | 595.64 | 605.40 | 551.97 | 644.71 | 562.16 | 505.33 |
| pH | 8.1 | 8.5 | 8.3 | - | 8.3 | 9.3 | 8.8 | 8.8 | 8.7 | 8.6 | 8.8 | 8.9 |
| I (Ionic Strength ?) | 0.1103 | 0.1155 | 0.1129 | - | 0.1047 | 0.1025 | 0.1042 | 0.1059 | 0.0966 | 0.1227 | 0.0984 | 0.0884 |
| Dissolved Inorganic Carbon (mM) | 3.75 | 3.39 | 3.57 | - | 3.19 | 2.81 | 3.39 | 3.35 | 2.52 | 3.17 | 2.29 | 3.49 |
| pCO2 (μatm) | 1186 | 434 | 809.8 | - | 742.8 | 53.0 | 267.4 | 264.6 | 266.5 | 335.5 | 187.8 | 207.0 |
| Equilibrium CO2 | 14.76 | 13.07 | 13.92 | - | 13.45 | 13.09 | 13.72 | 14.16 | 14.13 | 13.06 | 13.74 | 13.38 |
| CO2 (μM) | 47.31 | 15.32 | 31.32 | - | 27.88 | 1.86 | 10.70 | 10.80 | 10.68 | 12.17 | 7.37 | 7.64 |
| Δ CO2 from Equilibrium | 32.553 | 2.249 | 17.40 | - | 14.43 | -11.23 | -3.02 | -3.37 | -3.45 | -0.89 | -6.37 | -5.74 |