| Report Year: 2009 |
| Indian Lake, Van Buren County |
| Carbon Balance Table |
| Parameter | 7/22/2009 | 6/17/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 93 | 122 | 107.5 | - | - | - | 121.5 | 116.7 | 63.7 | 94.5 | 95.0 | 157.7 |
| Dissolved Organic Carbon (mM) | 0.53 | 0.46 | 0.49 | - | - | - | 0.71 | 0.64 | 1.12 | 1.09 | - | - |
| Temperature (oC) | 23.7 | 24.1 | 23.9 | - | - | - | 29.0 | 25.6 | 24.3 | 30.0 | 25.7 | 27.0 |
| Specific Conductivity (μS/cm) | 250.0 | 310.0 | 280.00 | - | - | - | 352.56 | 269.63 | 206.92 | 280.88 | 254.34 | 298.31 |
| pH | 8.1 | 8.4 | 8.3 | - | - | - | 9.2 | 8.5 | 9.0 | 9.1 | 9.1 | 8.8 |
| I (Ionic Strength ?) | 0.0438 | 0.0543 | 0.0490 | - | - | - | 0.0617 | 0.0472 | 0.0362 | 0.0492 | 0.0445 | 0.0522 |
| Dissolved Inorganic Carbon (mM) | 1.86 | 2.39 | 2.13 | - | - | - | 2.06 | 2.25 | 1.14 | 1.60 | 1.67 | 2.96 |
| pCO2 (μatm) | 644 | 447 | 545.3 | - | - | - | 241.3 | 409.0 | 86.3 | 336.8 | 165.4 | 1335.4 |
| Equilibrium CO2 | 13.12 | 12.98 | 13.05 | - | - | - | 11.32 | 12.46 | 12.99 | 11.03 | 12.55 | 11.97 |
| CO2 (μM) | 22.84 | 15.68 | 19.26 | - | - | - | 7.57 | 13.91 | 3.16 | 10.77 | 6.56 | 45.61 |
| Δ CO2 from Equilibrium | 9.715 | 2.693 | 6.20 | - | - | - | -3.75 | 1.44 | -9.84 | -0.26 | -6.00 | 33.64 |