| Report Year: 2009 |
| Cold Springs Lake, Cass County |
| Carbon Balance Table |
| Parameter | 7/14/2009 | 6/9/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 117 | 105 | 111.0 | - | - | - | 128.5 | 147.7 | 82.7 | 103.0 | 95.3 | 111.7 |
| Dissolved Organic Carbon (mM) | 0.44 | 0.44 | 0.44 | - | - | - | 0.54 | 0.42 | 0.99 | 0.91 | - | - |
| Temperature (oC) | 25.8 | 22.0 | 23.9 | - | - | - | 25.2 | 24.1 | 24.5 | 25.3 | 23.8 | 26.8 |
| Specific Conductivity (μS/cm) | 240.0 | 230.0 | 235.00 | - | - | - | 290.11 | 322.38 | 280.35 | 263.58 | 191.71 | 237.81 |
| pH | 8.3 | 8.8 | 8.6 | - | - | - | 8.8 | 8.1 | 8.8 | 9.2 | 9.4 | 8.7 |
| I (Ionic Strength ?) | 0.0420 | 0.0403 | 0.0411 | - | - | - | 0.0508 | 0.0564 | 0.0491 | 0.0461 | 0.0335 | 0.0416 |
| Dissolved Inorganic Carbon (mM) | 2.31 | 2.00 | 2.15 | - | - | - | 2.41 | 2.94 | 1.56 | 1.78 | 1.55 | 2.14 |
| pCO2 (μatm) | 507 | 147 | 327.1 | - | - | - | 165.8 | 1006.2 | 119.0 | 48.3 | 83.1 | 216.2 |
| Equilibrium CO2 | 12.35 | 13.83 | 13.09 | - | - | - | 12.67 | 13.03 | 12.84 | 12.63 | 13.27 | 12.05 |
| CO2 (μM) | 16.93 | 5.49 | 11.21 | - | - | - | 5.94 | 35.53 | 4.20 | 1.72 | 3.40 | 7.00 |
| Δ CO2 from Equilibrium | 4.581 | -8.335 | -1.88 | - | - | - | -6.74 | 22.49 | -8.65 | -10.92 | -9.87 | -5.04 |