| Report Year: 2009 |
| Lake Sugema, Van Buren County |
| Carbon Balance Table |
| Parameter | 6/17/2009 | 7/21/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 78 | 81 | 79.5 | - | - | - | 94.0 | 82.8 | 58.0 | 77.3 | 78.3 | 110.3 |
| Dissolved Organic Carbon (mM) | 0.58 | 0.53 | 0.56 | - | - | - | 0.70 | 0.48 | 0.89 | 0.96 | - | - |
| Temperature (oC) | 22.3 | 23.0 | 22.7 | - | - | - | 26.7 | 23.8 | 24.6 | 27.4 | 22.0 | 25.5 |
| Specific Conductivity (μS/cm) | 180.0 | 190.0 | 185.00 | - | - | - | 216.17 | 201.94 | 189.92 | 324.68 | 176.70 | 200.57 |
| pH | 8.8 | 8.1 | 8.4 | - | - | - | 8.8 | 8.6 | 8.1 | 8.8 | 8.4 | 8.6 |
| I (Ionic Strength ?) | 0.0315 | 0.0333 | 0.0324 | - | - | - | 0.0372 | 0.0353 | 0.0340 | 0.0683 | 0.0309 | 0.0351 |
| Dissolved Inorganic Carbon (mM) | 1.49 | 1.62 | 1.56 | - | - | - | 1.71 | 1.61 | 1.23 | 1.38 | 1.54 | 2.12 |
| pCO2 (μatm) | 114 | 628 | 371.3 | - | - | - | 237.6 | 212.9 | 820.9 | 101.0 | 457.7 | 282.2 |
| Equilibrium CO2 | 13.69 | 13.39 | 13.54 | - | - | - | 12.31 | 13.14 | 13.62 | 11.31 | 13.94 | 12.49 |
| CO2 (μM) | 4.24 | 22.73 | 13.48 | - | - | - | 8.21 | 7.49 | 27.17 | 3.14 | 18.71 | 9.45 |
| Δ CO2 from Equilibrium | -9.452 | 9.338 | -0.06 | - | - | - | -4.10 | -5.64 | 13.55 | -8.17 | 4.77 | -3.04 |